./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3123460569 <...> Warning: Permanently added '10.128.0.151' (ED25519) to the list of known hosts. execve("./syz-executor3123460569", ["./syz-executor3123460569"], 0x7ffe1c9360d0 /* 10 vars */) = 0 brk(NULL) = 0x55557affa000 brk(0x55557affae00) = 0x55557affae00 arch_prctl(ARCH_SET_FS, 0x55557affa480) = 0 set_tid_address(0x55557affa750) = 5835 set_robust_list(0x55557affa760, 24) = 0 rseq(0x55557affada0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3123460569", 4096) = 28 getrandom("\x93\xf7\x77\xa3\x87\xd3\x0d\x9b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557affae00 brk(0x55557b01be00) = 0x55557b01be00 brk(0x55557b01c000) = 0x55557b01c000 mprotect(0x7fb12f129000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7fb12f07ba60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fb12f084560}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fb12f07ba60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fb12f084560}, NULL, 8) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5837 attached [pid 5837] set_robust_list(0x55557affa760, 24 [pid 5835] <... clone resumed>, child_tidptr=0x55557affa750) = 5837 [pid 5837] <... set_robust_list resumed>) = 0 [pid 5837] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5837] setpgid(0, 0) = 0 [pid 5837] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5837] write(3, "1000", 4) = 4 [pid 5837] close(3) = 0 executing program [pid 5837] write(1, "executing program\n", 18) = 18 [pid 5837] memfd_create("syzkaller", 0) = 3 [pid 5837] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5837] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5837] munmap(0x7fb126c00000, 138412032) = 0 [pid 5837] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5837] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5837] close(3) = 0 [pid 5837] close(4) = 0 [pid 5837] mkdir("./file1", 0777) = 0 [ 79.305019][ T5837] loop0: detected capacity change from 0 to 32768 [ 79.353398][ T5837] ======================================================= [ 79.353398][ T5837] WARNING: The mand mount option has been deprecated and [ 79.353398][ T5837] and is ignored by this kernel. Remove the mand [ 79.353398][ T5837] option from the mount to silence this warning. [ 79.353398][ T5837] ======================================================= [pid 5837] mount("/dev/loop0", "./file1", "ocfs2", MS_MANDLOCK|MS_DIRSYNC|MS_NODIRATIME, "acl,heartbeat=none,nouser_xattr,coherency=full,data=writeback,localalloc=00000000000000000001,acl,no"...) = 0 [pid 5837] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5837] chdir("./file1") = 0 [pid 5837] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5837] mkdir("./file0", 0777) = 0 [pid 5837] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5837] mkdir("./bus", 0777) = 0 [pid 5837] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [ 79.406676][ T5837] ocfs2: Mounting device (7,0) on (node local, slot 0) with writeback data mode. [ 79.474957][ T5837] overlayfs: upper fs does not support tmpfile. [ 79.483662][ T5837] overlayfs: upper fs does not support RENAME_WHITEOUT. [ 79.490982][ T5837] [ 79.493313][ T5837] ====================================================== [ 79.500320][ T5837] WARNING: possible circular locking dependency detected [ 79.507342][ T5837] 6.16.0-rc7-syzkaller-00140-gec2df4364666 #0 Not tainted [ 79.514434][ T5837] ------------------------------------------------------ [ 79.521445][ T5837] syz-executor312/5837 is trying to acquire lock: [ 79.527843][ T5837] ffff888076e25100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 79.541107][ T5837] [ 79.541107][ T5837] but task is already holding lock: [ 79.548456][ T5837] ffff88807494dc78 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0 [ 79.557958][ T5837] [ 79.557958][ T5837] which lock already depends on the new lock. [ 79.557958][ T5837] [ 79.568345][ T5837] [ 79.568345][ T5837] the existing dependency chain (in reverse order) is: [ 79.577344][ T5837] [ 79.577344][ T5837] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}: [ 79.585162][ T5837] lock_acquire+0x120/0x360 [ 79.590178][ T5837] down_write+0x96/0x1f0 [ 79.594960][ T5837] ocfs2_xattr_set_handle+0x3b0/0x7a0 [ 79.600868][ T5837] ocfs2_init_security_set+0xbd/0xe0 [ 79.606681][ T5837] ocfs2_mknod+0x137f/0x2050 [ 79.611791][ T5837] ocfs2_mkdir+0x191/0x440 [ 79.616721][ T5837] vfs_mkdir+0x306/0x510 [ 79.621484][ T5837] do_mkdirat+0x247/0x590 [ 79.626332][ T5837] __x64_sys_mkdir+0x6c/0x80 [ 79.631464][ T5837] do_syscall_64+0xfa/0x3b0 [ 79.636489][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.642934][ T5837] [ 79.642934][ T5837] -> #3 (jbd2_handle){.+.+}-{0:0}: [ 79.650227][ T5837] lock_acquire+0x120/0x360 [ 79.655243][ T5837] start_this_handle+0x1fa7/0x21c0 [ 79.660871][ T5837] jbd2__journal_start+0x2c1/0x5b0 [ 79.666499][ T5837] jbd2_journal_start+0x2a/0x40 [ 79.671866][ T5837] ocfs2_start_trans+0x376/0x6d0 [ 79.677321][ T5837] ocfs2_reserve_suballoc_bits+0x711/0x4640 [ 79.683730][ T5837] ocfs2_reserve_new_metadata_blocks+0x403/0x940 [ 79.690572][ T5837] ocfs2_mknod+0xe08/0x2050 [ 79.695586][ T5837] ocfs2_mkdir+0x191/0x440 [ 79.700515][ T5837] vfs_mkdir+0x306/0x510 [ 79.705276][ T5837] do_mkdirat+0x247/0x590 [ 79.710128][ T5837] __x64_sys_mkdir+0x6c/0x80 [ 79.715250][ T5837] do_syscall_64+0xfa/0x3b0 [ 79.720266][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.726695][ T5837] [ 79.726695][ T5837] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: [ 79.735218][ T5837] lock_acquire+0x120/0x360 [ 79.740237][ T5837] down_read+0x46/0x2e0 [ 79.744909][ T5837] ocfs2_start_trans+0x36a/0x6d0 [ 79.750382][ T5837] ocfs2_reserve_suballoc_bits+0x711/0x4640 [ 79.756791][ T5837] ocfs2_reserve_new_metadata_blocks+0x403/0x940 [ 79.763632][ T5837] ocfs2_mknod+0xe08/0x2050 [ 79.768652][ T5837] ocfs2_mkdir+0x191/0x440 [ 79.773588][ T5837] vfs_mkdir+0x306/0x510 [ 79.778350][ T5837] do_mkdirat+0x247/0x590 [ 79.783203][ T5837] __x64_sys_mkdir+0x6c/0x80 [ 79.788311][ T5837] do_syscall_64+0xfa/0x3b0 [ 79.793329][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.799736][ T5837] [ 79.799736][ T5837] -> #1 (sb_internal#2){.+.+}-{0:0}: [ 79.807328][ T5837] lock_acquire+0x120/0x360 [ 79.812343][ T5837] ocfs2_start_trans+0x26b/0x6d0 [ 79.817809][ T5837] ocfs2_reserve_suballoc_bits+0x711/0x4640 [ 79.824217][ T5837] ocfs2_reserve_new_metadata_blocks+0x403/0x940 [ 79.831060][ T5837] ocfs2_mknod+0xe08/0x2050 [ 79.836076][ T5837] ocfs2_mkdir+0x191/0x440 [ 79.841004][ T5837] vfs_mkdir+0x306/0x510 [ 79.845764][ T5837] do_mkdirat+0x247/0x590 [ 79.850613][ T5837] __x64_sys_mkdir+0x6c/0x80 [ 79.855720][ T5837] do_syscall_64+0xfa/0x3b0 [ 79.860759][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.867681][ T5837] [ 79.867681][ T5837] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}: [ 79.878195][ T5837] validate_chain+0xb9b/0x2140 [ 79.883472][ T5837] __lock_acquire+0xab9/0xd20 [ 79.888658][ T5837] lock_acquire+0x120/0x360 [ 79.893670][ T5837] down_write+0x96/0x1f0 [ 79.898449][ T5837] ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 79.904872][ T5837] ocfs2_reserve_clusters_with_limit+0x2fb/0xba0 [ 79.911718][ T5837] ocfs2_init_xattr_set_ctxt+0x376/0x700 [ 79.917868][ T5837] ocfs2_xattr_set+0xb70/0x11f0 [ 79.923233][ T5837] __vfs_setxattr+0x43c/0x480 [ 79.928423][ T5837] __vfs_setxattr_noperm+0x12d/0x660 [ 79.934220][ T5837] vfs_setxattr+0x16b/0x2f0 [ 79.939233][ T5837] ovl_get_workdir+0xbb7/0x1730 [ 79.944602][ T5837] ovl_fill_super+0x1386/0x35d0 [ 79.949966][ T5837] get_tree_nodev+0xb8/0x150 [ 79.955076][ T5837] vfs_get_tree+0x92/0x2b0 [ 79.960001][ T5837] do_new_mount+0x24a/0xa40 [ 79.965016][ T5837] __se_sys_mount+0x317/0x410 [ 79.970205][ T5837] do_syscall_64+0xfa/0x3b0 [ 79.975222][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.981629][ T5837] [ 79.981629][ T5837] other info that might help us debug this: [ 79.981629][ T5837] [ 79.991845][ T5837] Chain exists of: [ 79.991845][ T5837] &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4 --> jbd2_handle --> &oi->ip_xattr_sem [ 79.991845][ T5837] [ 80.007584][ T5837] Possible unsafe locking scenario: [ 80.007584][ T5837] [ 80.015018][ T5837] CPU0 CPU1 [ 80.020370][ T5837] ---- ---- [ 80.025720][ T5837] lock(&oi->ip_xattr_sem); [ 80.030306][ T5837] lock(jbd2_handle); [ 80.036885][ T5837] lock(&oi->ip_xattr_sem); [ 80.043986][ T5837] lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4); [ 80.051273][ T5837] [ 80.051273][ T5837] *** DEADLOCK *** [ 80.051273][ T5837] [ 80.059403][ T5837] 4 locks held by syz-executor312/5837: [ 80.064931][ T5837] #0: ffff888030b140e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970 [ 80.075046][ T5837] #1: ffff88807f224428 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 80.084194][ T5837] #2: ffff88807494df40 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0 [ 80.094643][ T5837] #3: ffff88807494dc78 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0 [ 80.104568][ T5837] [ 80.104568][ T5837] stack backtrace: [ 80.110464][ T5837] CPU: 1 UID: 0 PID: 5837 Comm: syz-executor312 Not tainted 6.16.0-rc7-syzkaller-00140-gec2df4364666 #0 PREEMPT(full) [ 80.110484][ T5837] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 80.110499][ T5837] Call Trace: [ 80.110512][ T5837] [ 80.110520][ T5837] dump_stack_lvl+0x189/0x250 [ 80.110541][ T5837] ? __pfx_dump_stack_lvl+0x10/0x10 [ 80.110557][ T5837] ? __pfx__printk+0x10/0x10 [ 80.110578][ T5837] ? print_lock_name+0xde/0x100 [ 80.110597][ T5837] print_circular_bug+0x2ee/0x310 [ 80.110618][ T5837] check_noncircular+0x134/0x160 [ 80.110638][ T5837] validate_chain+0xb9b/0x2140 [ 80.110657][ T5837] ? __mutex_unlock_slowpath+0x1cd/0x700 [ 80.110678][ T5837] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 80.110698][ T5837] __lock_acquire+0xab9/0xd20 [ 80.110715][ T5837] ? ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 80.110734][ T5837] lock_acquire+0x120/0x360 [ 80.110747][ T5837] ? ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 80.110768][ T5837] ? __kasan_check_byte+0x12/0x40 [ 80.110783][ T5837] ? unwind_next_frame+0xa5/0x2390 [ 80.110802][ T5837] down_write+0x96/0x1f0 [ 80.110820][ T5837] ? ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 80.110840][ T5837] ? __pfx_down_write+0x10/0x10 [ 80.110859][ T5837] ? lock_release+0x4b/0x3e0 [ 80.110874][ T5837] ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 80.110895][ T5837] ? is_bpf_text_address+0x26/0x2b0 [ 80.110912][ T5837] ? kernel_text_address+0xa5/0xe0 [ 80.110935][ T5837] ? __kernel_text_address+0xd/0x40 [ 80.110957][ T5837] ? unwind_get_return_address+0x4d/0x90 [ 80.110973][ T5837] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 80.110993][ T5837] ? arch_stack_walk+0xfc/0x150 [ 80.111014][ T5837] ? stack_trace_save+0x9c/0xe0 [ 80.111033][ T5837] ? __pfx_ocfs2_reserve_suballoc_bits+0x10/0x10 [ 80.111054][ T5837] ? check_path+0x21/0x40 [ 80.111070][ T5837] ? check_noncircular+0xe0/0x160 [ 80.111089][ T5837] ? lockdep_unlock+0x89/0x120 [ 80.111110][ T5837] ? validate_chain+0x897/0x2140 [ 80.111128][ T5837] ? get_tree_nodev+0xb8/0x150 [ 80.111157][ T5837] ? __lock_acquire+0xab9/0xd20 [ 80.111177][ T5837] ? do_raw_spin_unlock+0x122/0x240 [ 80.111198][ T5837] ? _raw_spin_unlock+0x28/0x50 [ 80.111221][ T5837] ? ocfs2_alloc_should_use_local+0x152/0x310 [ 80.111238][ T5837] ? ocfs2_reserve_clusters_with_limit+0x16b/0xba0 [ 80.111265][ T5837] ocfs2_reserve_clusters_with_limit+0x2fb/0xba0 [ 80.111288][ T5837] ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10 [ 80.111311][ T5837] ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10 [ 80.111328][ T5837] ? __lock_acquire+0xab9/0xd20 [ 80.111346][ T5837] ocfs2_init_xattr_set_ctxt+0x376/0x700 [ 80.111370][ T5837] ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10 [ 80.111394][ T5837] ? ocfs2_xattr_set+0xb36/0x11f0 [ 80.111417][ T5837] ? up_write+0x1c4/0x420 [ 80.111434][ T5837] ? ocfs2_xattr_set+0x334/0x11f0 [ 80.111455][ T5837] ocfs2_xattr_set+0xb70/0x11f0 [ 80.111484][ T5837] ? __pfx_ocfs2_xattr_set+0x10/0x10 [ 80.111505][ T5837] ? up+0xde/0x150 [ 80.111524][ T5837] ? smack_log+0xef/0x3f0 [ 80.111547][ T5837] ? __pfx___console_unlock+0x10/0x10 [ 80.111565][ T5837] ? smk_access+0x14c/0x4e0 [ 80.111588][ T5837] ? smk_tskacc+0x2fc/0x370 [ 80.111611][ T5837] ? posix_xattr_acl+0x93/0xc0 [ 80.111631][ T5837] ? evm_protect_xattr+0x4d4/0xa90 [ 80.111651][ T5837] ? __pfx_evm_protect_xattr+0x10/0x10 [ 80.111669][ T5837] ? safesetid_security_capable+0xa9/0x1a0 [ 80.111686][ T5837] ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10 [ 80.111709][ T5837] __vfs_setxattr+0x43c/0x480 [ 80.111729][ T5837] __vfs_setxattr_noperm+0x12d/0x660 [ 80.111749][ T5837] vfs_setxattr+0x16b/0x2f0 [ 80.111767][ T5837] ? __pfx_vfs_setxattr+0x10/0x10 [ 80.111784][ T5837] ? up_write+0x1c4/0x420 [ 80.111803][ T5837] ovl_get_workdir+0xbb7/0x1730 [ 80.111827][ T5837] ? __pfx_ovl_get_workdir+0x10/0x10 [ 80.111855][ T5837] ? do_raw_spin_unlock+0x122/0x240 [ 80.111876][ T5837] ? _raw_spin_unlock+0x28/0x50 [ 80.111898][ T5837] ? ovl_inuse_trylock+0xae/0xf0 [ 80.111918][ T5837] ovl_fill_super+0x1386/0x35d0 [ 80.111941][ T5837] ? rcu_is_watching+0x15/0xb0 [ 80.111960][ T5837] ? shrinker_register+0x124/0x230 [ 80.111982][ T5837] ? __pfx_ovl_fill_super+0x10/0x10 [ 80.112001][ T5837] ? __pfx___mutex_lock+0x10/0x10 [ 80.112018][ T5837] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 80.112038][ T5837] ? __raw_spin_lock_init+0x45/0x100 [ 80.112062][ T5837] ? sget_fc+0x962/0xa40 [ 80.112083][ T5837] ? __pfx_set_anon_super_fc+0x10/0x10 [ 80.112106][ T5837] ? __pfx_ovl_fill_super+0x10/0x10 [ 80.112125][ T5837] get_tree_nodev+0xb8/0x150 [ 80.112148][ T5837] vfs_get_tree+0x92/0x2b0 [ 80.112164][ T5837] do_new_mount+0x24a/0xa40 [ 80.112184][ T5837] __se_sys_mount+0x317/0x410 [ 80.112203][ T5837] ? __pfx___se_sys_mount+0x10/0x10 [ 80.112222][ T5837] ? __x64_sys_mount+0x20/0xc0 [ 80.112239][ T5837] do_syscall_64+0xfa/0x3b0 [ 80.112263][ T5837] ? lockdep_hardirqs_on+0x9c/0x150 [ 80.112278][ T5837] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 80.112294][ T5837] ? clear_bhb_loop+0x60/0xb0 [ 80.112311][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 80.112326][ T5837] RIP: 0033:0x7fb12f0b1619 [ 80.112344][ T5837] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 80.112362][ T5837] RSP: 002b:00007ffd8067e208 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 80.112378][ T5837] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb12f0b1619 [ 80.112390][ T5837] RDX: 0000200000000000 RSI: 0000200000000080 RDI: 0000000000000000 [ 80.112400][ T5837] RBP: 0000000000000000 R08: 00002000000002c0 R09: 00007ffd8067e240 [ 80.112411][ T5837] R10: 0000000000010000 R11: 0000000000000246 R12: 00007ffd8067e240 [ 80.112422][ T5837] R13: 00007ffd8067e4c8 R14: 431bde82d7b634db R15: 00007fb12f0fa03b [ 80.112439][ T5837] [pid 5837] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5837] exit_group(0) = ? [pid 5837] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5837, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=20 /* 0.20 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5840 attached [pid 5840] set_robust_list(0x55557affa760, 24) = 0 [pid 5835] <... clone resumed>, child_tidptr=0x55557affa750) = 5840 [pid 5840] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5840] setpgid(0, 0) = 0 [pid 5840] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5840] write(3, "1000", 4) = 4 [pid 5840] close(3) = 0 [pid 5840] write(1, "executing program\n", 18executing program ) = 18 [pid 5840] memfd_create("syzkaller", 0) = 3 [pid 5840] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [ 80.677139][ T5837] overlayfs: upper fs missing required features. [pid 5840] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5840] munmap(0x7fb126c00000, 138412032) = 0 [pid 5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5840] close(3) = 0 [pid 5840] mkdir("./file0", 0777) = 0 [pid 5840] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5840] mkdir("./bus", 0777) = 0 [pid 5840] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5840] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = 0 [pid 5840] exit_group(0) = ? [pid 5840] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5840, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=8 /* 0.08 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5841 attached , child_tidptr=0x55557affa750) = 5841 [pid 5841] set_robust_list(0x55557affa760, 24) = 0 [pid 5841] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5841] setpgid(0, 0) = 0 [pid 5841] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5841] write(3, "1000", 4) = 4 [pid 5841] close(3) = 0 executing program [pid 5841] write(1, "executing program\n", 18) = 18 [pid 5841] memfd_create("syzkaller", 0) = 3 [pid 5841] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5841] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5841] munmap(0x7fb126c00000, 138412032) = 0 [pid 5841] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5841] close(3) = 0 [pid 5841] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5841] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5841] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5841] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5841] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5841] exit_group(0) = ? [pid 5841] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5841, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=12 /* 0.12 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5842 attached [pid 5842] set_robust_list(0x55557affa760, 24) = 0 [pid 5835] <... clone resumed>, child_tidptr=0x55557affa750) = 5842 [pid 5842] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5842] setpgid(0, 0) = 0 [pid 5842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5842] write(3, "1000", 4) = 4 [pid 5842] close(3) = 0 [pid 5842] write(1, "executing program\n", 18executing program ) = 18 [ 81.123938][ T5841] overlay: filesystem on ./file0 not supported as upperdir [pid 5842] memfd_create("syzkaller", 0) = 3 [pid 5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5842] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5842] munmap(0x7fb126c00000, 138412032) = 0 [pid 5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5842] close(3) = 0 [pid 5842] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5842] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5842] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5842] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5842] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5842] exit_group(0) = ? [pid 5842] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5842, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5844 attached , child_tidptr=0x55557affa750) = 5844 [pid 5844] set_robust_list(0x55557affa760, 24) = 0 [ 81.387223][ T5842] overlay: filesystem on ./file0 not supported as upperdir [pid 5844] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5844] setpgid(0, 0) = 0 [pid 5844] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5844] write(3, "1000", 4) = 4 [pid 5844] close(3) = 0 [pid 5844] write(1, "executing program\n", 18executing program ) = 18 [pid 5844] memfd_create("syzkaller", 0) = 3 [pid 5844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5844] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5844] munmap(0x7fb126c00000, 138412032) = 0 [pid 5844] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5844] close(3) = 0 [pid 5844] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5844] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5844] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5844] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5844] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5844] exit_group(0) = ? [pid 5844] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5844, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- [ 81.718810][ T5844] overlay: filesystem on ./file0 not supported as upperdir openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5846 attached , child_tidptr=0x55557affa750) = 5846 [pid 5846] set_robust_list(0x55557affa760, 24) = 0 [pid 5846] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5846] setpgid(0, 0) = 0 [pid 5846] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5846] write(3, "1000", 4) = 4 [pid 5846] close(3) = 0 [pid 5846] write(1, "executing program\n", 18executing program ) = 18 [pid 5846] memfd_create("syzkaller", 0) = 3 [pid 5846] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5846] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5846] munmap(0x7fb126c00000, 138412032) = 0 [pid 5846] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5846] close(3) = 0 [pid 5846] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5846] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5846] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5846] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5846] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5846] exit_group(0) = ? [pid 5846] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5846, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=8 /* 0.08 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5847 attached , child_tidptr=0x55557affa750) = 5847 [ 82.013355][ T5846] overlay: filesystem on ./file0 not supported as upperdir [pid 5847] set_robust_list(0x55557affa760, 24) = 0 [pid 5847] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5847] setpgid(0, 0) = 0 [pid 5847] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "1000", 4) = 4 [pid 5847] close(3) = 0 executing program [pid 5847] write(1, "executing program\n", 18) = 18 [pid 5847] memfd_create("syzkaller", 0) = 3 [pid 5847] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5847] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5847] munmap(0x7fb126c00000, 138412032) = 0 [pid 5847] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5847] close(3) = 0 [pid 5847] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5847] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5847] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5847] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5847] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5847] exit_group(0) = ? [pid 5847] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5847, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=7 /* 0.07 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 82.350034][ T5847] overlay: filesystem on ./file0 not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5848 attached , child_tidptr=0x55557affa750) = 5848 [pid 5848] set_robust_list(0x55557affa760, 24) = 0 [pid 5848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5848] setpgid(0, 0) = 0 [pid 5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5848] write(3, "1000", 4) = 4 [pid 5848] close(3) = 0 executing program [pid 5848] write(1, "executing program\n", 18) = 18 [pid 5848] memfd_create("syzkaller", 0) = 3 [pid 5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5848] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5848] munmap(0x7fb126c00000, 138412032) = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5848] close(3) = 0 [pid 5848] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5848] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5848] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5848] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5848] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5848] exit_group(0) = ? [pid 5848] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5848, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=8 /* 0.08 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5849 attached , child_tidptr=0x55557affa750) = 5849 [pid 5849] set_robust_list(0x55557affa760, 24) = 0 [pid 5849] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5849] setpgid(0, 0) = 0 [pid 5849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "1000", 4) = 4 [pid 5849] close(3) = 0 [pid 5849] write(1, "executing program\n", 18executing program [ 82.648512][ T5848] overlay: filesystem on ./file0 not supported as upperdir ) = 18 [pid 5849] memfd_create("syzkaller", 0) = 3 [pid 5849] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5849] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5849] munmap(0x7fb126c00000, 138412032) = 0 [pid 5849] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5849] close(3) = 0 [pid 5849] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5849] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5849] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5849] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5849] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5849] exit_group(0) = ? [pid 5849] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5849, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5850 attached , child_tidptr=0x55557affa750) = 5850 [pid 5850] set_robust_list(0x55557affa760, 24) = 0 [pid 5850] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 82.923835][ T5849] overlay: filesystem on ./file0 not supported as upperdir [pid 5850] setpgid(0, 0) = 0 [pid 5850] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5850] write(3, "1000", 4) = 4 [pid 5850] close(3) = 0 executing program [pid 5850] write(1, "executing program\n", 18) = 18 [pid 5850] memfd_create("syzkaller", 0) = 3 [pid 5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5850] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5850] munmap(0x7fb126c00000, 138412032) = 0 [pid 5850] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5850] close(3) = 0 [pid 5850] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5850] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5850] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5850] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5850] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5850] exit_group(0) = ? [pid 5850] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5850, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5852 attached , child_tidptr=0x55557affa750) = 5852 [ 83.216076][ T5850] overlay: filesystem on ./file0 not supported as upperdir [pid 5852] set_robust_list(0x55557affa760, 24) = 0 [pid 5852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5852] setpgid(0, 0) = 0 [pid 5852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5852] write(3, "1000", 4) = 4 [pid 5852] close(3) = 0 executing program [pid 5852] write(1, "executing program\n", 18) = 18 [pid 5852] memfd_create("syzkaller", 0) = 3 [pid 5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5852] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5852] munmap(0x7fb126c00000, 138412032) = 0 [pid 5852] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5852] close(3) = 0 [pid 5852] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5852] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5852] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5852] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5852] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5852] exit_group(0) = ? [pid 5852] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5852, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=8 /* 0.08 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 83.559251][ T5852] overlay: filesystem on ./file0 not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5855 attached , child_tidptr=0x55557affa750) = 5855 [pid 5855] set_robust_list(0x55557affa760, 24) = 0 [pid 5855] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5855] setpgid(0, 0) = 0 [pid 5855] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5855] write(3, "1000", 4) = 4 [pid 5855] close(3) = 0 executing program [pid 5855] write(1, "executing program\n", 18) = 18 [pid 5855] memfd_create("syzkaller", 0) = 3 [pid 5855] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5855] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5855] munmap(0x7fb126c00000, 138412032) = 0 [pid 5855] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5855] close(3) = 0 [pid 5855] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5855] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5855] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5855] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5855] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5855] exit_group(0) = ? [pid 5855] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5855, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5856 attached , child_tidptr=0x55557affa750) = 5856 [pid 5856] set_robust_list(0x55557affa760, 24) = 0 [pid 5856] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5856] setpgid(0, 0) = 0 [pid 5856] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5856] write(3, "1000", 4) = 4 [pid 5856] close(3) = 0 executing program [pid 5856] write(1, "executing program\n", 18) = 18 [pid 5856] memfd_create("syzkaller", 0) = 3 [pid 5856] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [ 83.853939][ T5855] overlay: filesystem on ./file0 not supported as upperdir [pid 5856] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5856] munmap(0x7fb126c00000, 138412032) = 0 [pid 5856] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5856] close(3) = 0 [pid 5856] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5856] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5856] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5856] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5856] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5856] exit_group(0) = ? [pid 5856] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5856, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5857 attached , child_tidptr=0x55557affa750) = 5857 [ 84.076135][ T5856] overlay: filesystem on ./file0 not supported as upperdir [pid 5857] set_robust_list(0x55557affa760, 24) = 0 [pid 5857] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5857] setpgid(0, 0) = 0 [pid 5857] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5857] write(3, "1000", 4) = 4 [pid 5857] close(3) = 0 [pid 5857] write(1, "executing program\n", 18executing program ) = 18 [pid 5857] memfd_create("syzkaller", 0) = 3 [pid 5857] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5857] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5857] munmap(0x7fb126c00000, 138412032) = 0 [pid 5857] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5857] close(3) = 0 [pid 5857] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5857] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5857] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5857] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5857] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5857] exit_group(0) = ? [pid 5857] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5857, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=7 /* 0.07 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5858 attached , child_tidptr=0x55557affa750) = 5858 [ 84.366574][ T5857] overlay: filesystem on ./file0 not supported as upperdir [pid 5858] set_robust_list(0x55557affa760, 24) = 0 [pid 5858] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5858] setpgid(0, 0) = 0 [pid 5858] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5858] write(3, "1000", 4) = 4 [pid 5858] close(3) = 0 [pid 5858] write(1, "executing program\n", 18executing program ) = 18 [pid 5858] memfd_create("syzkaller", 0) = 3 [pid 5858] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5858] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5858] munmap(0x7fb126c00000, 138412032) = 0 [pid 5858] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5858] close(3) = 0 [pid 5858] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5858] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5858] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5858] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5858] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5858] exit_group(0) = ? [pid 5858] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5858, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} --- [ 84.672250][ T5858] overlay: filesystem on ./file0 not supported as upperdir openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5860 attached , child_tidptr=0x55557affa750) = 5860 [pid 5860] set_robust_list(0x55557affa760, 24) = 0 [pid 5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5860] setpgid(0, 0) = 0 [pid 5860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5860] write(3, "1000", 4) = 4 [pid 5860] close(3) = 0 executing program [pid 5860] write(1, "executing program\n", 18) = 18 [pid 5860] memfd_create("syzkaller", 0) = 3 [pid 5860] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5860] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5860] munmap(0x7fb126c00000, 138412032) = 0 [pid 5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5860] close(3) = 0 [pid 5860] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5860] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5860] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5860] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5860] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5860] exit_group(0) = ? [pid 5860] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5860, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 85.026994][ T5860] overlay: filesystem on ./file0 not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5861 attached , child_tidptr=0x55557affa750) = 5861 [pid 5861] set_robust_list(0x55557affa760, 24) = 0 [pid 5861] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5861] setpgid(0, 0) = 0 [pid 5861] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5861] write(3, "1000", 4) = 4 [pid 5861] close(3) = 0 executing program [pid 5861] write(1, "executing program\n", 18) = 18 [pid 5861] memfd_create("syzkaller", 0) = 3 [pid 5861] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5861] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5861] munmap(0x7fb126c00000, 138412032) = 0 [pid 5861] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5861] close(3) = 0 [pid 5861] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5861] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5861] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5861] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5861] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5861] exit_group(0) = ? [pid 5861] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5861, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 85.366717][ T5861] overlay: filesystem on ./file0 not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5863 attached , child_tidptr=0x55557affa750) = 5863 [pid 5863] set_robust_list(0x55557affa760, 24) = 0 [pid 5863] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5863] setpgid(0, 0) = 0 [pid 5863] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5863] write(3, "1000", 4) = 4 [pid 5863] close(3) = 0 [pid 5863] write(1, "executing program\n", 18executing program ) = 18 [pid 5863] memfd_create("syzkaller", 0) = 3 [pid 5863] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5863] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5863] munmap(0x7fb126c00000, 138412032) = 0 [pid 5863] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5863] close(3) = 0 [pid 5863] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5863] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5863] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5863] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5863] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5863] exit_group(0) = ? [pid 5863] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5863, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5864 attached , child_tidptr=0x55557affa750) = 5864 [pid 5864] set_robust_list(0x55557affa760, 24) = 0 [pid 5864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5864] setpgid(0, 0) = 0 [pid 5864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "1000", 4) = 4 [ 85.706617][ T5863] overlay: filesystem on ./file0 not supported as upperdir [pid 5864] close(3) = 0 executing program [pid 5864] write(1, "executing program\n", 18) = 18 [pid 5864] memfd_create("syzkaller", 0) = 3 [pid 5864] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5864] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5864] munmap(0x7fb126c00000, 138412032) = 0 [pid 5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5864] close(3) = 0 [pid 5864] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5864] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5864] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5864] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5864] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5864] exit_group(0) = ? [pid 5864] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5864, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=7 /* 0.07 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 85.951740][ T5864] overlay: filesystem on ./file0 not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5865 attached , child_tidptr=0x55557affa750) = 5865 [pid 5865] set_robust_list(0x55557affa760, 24) = 0 [pid 5865] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5865] setpgid(0, 0) = 0 [pid 5865] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "1000", 4) = 4 [pid 5865] close(3) = 0 executing program [pid 5865] write(1, "executing program\n", 18) = 18 [pid 5865] memfd_create("syzkaller", 0) = 3 [pid 5865] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5865] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5865] munmap(0x7fb126c00000, 138412032) = 0 [pid 5865] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5865] close(3) = 0 [pid 5865] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5865] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5865] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5865] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5865] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5865] exit_group(0) = ? [pid 5865] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5865, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=12 /* 0.12 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 86.276412][ T5865] overlay: filesystem on ./file0 not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5866 attached , child_tidptr=0x55557affa750) = 5866 [pid 5866] set_robust_list(0x55557affa760, 24) = 0 [pid 5866] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5866] setpgid(0, 0) = 0 [pid 5866] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5866] write(3, "1000", 4) = 4 [pid 5866] close(3) = 0 executing program [pid 5866] write(1, "executing program\n", 18) = 18 [pid 5866] memfd_create("syzkaller", 0) = 3 [pid 5866] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5866] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5866] munmap(0x7fb126c00000, 138412032) = 0 [pid 5866] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5866] close(3) = 0 [pid 5866] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5866] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5866] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5866] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5866] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5866] exit_group(0) = ? [pid 5866] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5866, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=8 /* 0.08 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 [ 86.650042][ T5866] overlay: filesystem on ./file0 not supported as upperdir openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5867 attached , child_tidptr=0x55557affa750) = 5867 [pid 5867] set_robust_list(0x55557affa760, 24) = 0 [pid 5867] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5867] setpgid(0, 0) = 0 [pid 5867] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5867] write(3, "1000", 4) = 4 [pid 5867] close(3) = 0 executing program [pid 5867] write(1, "executing program\n", 18) = 18 [pid 5867] memfd_create("syzkaller", 0) = 3 [pid 5867] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5867] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5867] munmap(0x7fb126c00000, 138412032) = 0 [pid 5867] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 86.832278][ T24] cfg80211: failed to load regulatory.db [pid 5867] close(3) = 0 [pid 5867] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5867] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5867] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5867] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5867] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5867] exit_group(0) = ? [pid 5867] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5867, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=12 /* 0.12 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5869 attached , child_tidptr=0x55557affa750) = 5869 [pid 5869] set_robust_list(0x55557affa760, 24) = 0 [pid 5869] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5869] setpgid(0, 0) = 0 [pid 5869] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5869] write(3, "1000", 4) = 4 [pid 5869] close(3) = 0 executing program [pid 5869] write(1, "executing program\n", 18) = 18 [pid 5869] memfd_create("syzkaller", 0) = 3 [pid 5869] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [ 86.953676][ T5867] overlay: filesystem on ./file0 not supported as upperdir [pid 5869] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5869] munmap(0x7fb126c00000, 138412032) = 0 [pid 5869] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5869] close(3) = 0 [pid 5869] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5869] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5869] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5869] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5869] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5869] exit_group(0) = ? [pid 5869] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5869, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=11 /* 0.11 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5870 attached , child_tidptr=0x55557affa750) = 5870 [ 87.185125][ T5869] overlay: filesystem on ./file0 not supported as upperdir [pid 5870] set_robust_list(0x55557affa760, 24) = 0 [pid 5870] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5870] setpgid(0, 0) = 0 [pid 5870] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5870] write(3, "1000", 4) = 4 [pid 5870] close(3) = 0 executing program [pid 5870] write(1, "executing program\n", 18) = 18 [pid 5870] memfd_create("syzkaller", 0) = 3 [pid 5870] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5870] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5870] munmap(0x7fb126c00000, 138412032) = 0 [pid 5870] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5870] close(3) = 0 [pid 5870] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5870] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5870] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5870] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5870] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5870] exit_group(0) = ? [pid 5870] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5870, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5871 attached , child_tidptr=0x55557affa750) = 5871 [pid 5871] set_robust_list(0x55557affa760, 24) = 0 [pid 5871] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 87.527878][ T5870] overlay: filesystem on ./file0 not supported as upperdir [pid 5871] setpgid(0, 0) = 0 [pid 5871] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5871] write(3, "1000", 4) = 4 [pid 5871] close(3) = 0 executing program [pid 5871] write(1, "executing program\n", 18) = 18 [pid 5871] memfd_create("syzkaller", 0) = 3 [pid 5871] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5871] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5871] munmap(0x7fb126c00000, 138412032) = 0 [pid 5871] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5871] close(3) = 0 [pid 5871] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5871] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5871] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5871] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5871] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5871] exit_group(0) = ? [pid 5871] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5871, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=11 /* 0.11 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 87.798077][ T5871] overlay: filesystem on ./file0 not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5872 attached , child_tidptr=0x55557affa750) = 5872 [pid 5872] set_robust_list(0x55557affa760, 24) = 0 [pid 5872] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5872] setpgid(0, 0) = 0 [pid 5872] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5872] write(3, "1000", 4) = 4 [pid 5872] close(3) = 0 executing program [pid 5872] write(1, "executing program\n", 18) = 18 [pid 5872] memfd_create("syzkaller", 0) = 3 [pid 5872] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5872] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5872] munmap(0x7fb126c00000, 138412032) = 0 [pid 5872] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5872] close(3) = 0 [pid 5872] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5872] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5872] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5872] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5872] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5872] exit_group(0) = ? [pid 5872] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5872, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5873 attached , child_tidptr=0x55557affa750) = 5873 [pid 5873] set_robust_list(0x55557affa760, 24) = 0 [ 88.117880][ T5872] overlay: filesystem on ./file0 not supported as upperdir [pid 5873] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5873] setpgid(0, 0) = 0 [pid 5873] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5873] write(3, "1000", 4) = 4 [pid 5873] close(3) = 0 [pid 5873] write(1, "executing program\n", 18executing program ) = 18 [pid 5873] memfd_create("syzkaller", 0) = 3 [pid 5873] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5873] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5873] munmap(0x7fb126c00000, 138412032) = 0 [pid 5873] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5873] close(3) = 0 [pid 5873] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5873] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5873] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5873] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5873] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5873] exit_group(0) = ? [pid 5873] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5873, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=13 /* 0.13 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 88.423211][ T5873] overlay: filesystem on ./file0 not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5874 attached , child_tidptr=0x55557affa750) = 5874 [pid 5874] set_robust_list(0x55557affa760, 24) = 0 [pid 5874] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5874] setpgid(0, 0) = 0 [pid 5874] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5874] write(3, "1000", 4) = 4 [pid 5874] close(3) = 0 executing program [pid 5874] write(1, "executing program\n", 18) = 18 [pid 5874] memfd_create("syzkaller", 0) = 3 [pid 5874] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5874] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5874] munmap(0x7fb126c00000, 138412032) = 0 [pid 5874] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5874] close(3) = 0 [pid 5874] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5874] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5874] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5874] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5874] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5874] exit_group(0) = ? [pid 5874] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5874, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 88.755329][ T5874] overlay: filesystem on ./file0 not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5875 attached , child_tidptr=0x55557affa750) = 5875 [pid 5875] set_robust_list(0x55557affa760, 24) = 0 [pid 5875] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5875] setpgid(0, 0) = 0 [pid 5875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5875] write(3, "1000", 4) = 4 [pid 5875] close(3) = 0 executing program [pid 5875] write(1, "executing program\n", 18) = 18 [pid 5875] memfd_create("syzkaller", 0) = 3 [pid 5875] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5875] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5875] munmap(0x7fb126c00000, 138412032) = 0 [pid 5875] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5875] close(3) = 0 [pid 5875] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5875] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5875] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5875] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5875] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5875] exit_group(0) = ? [pid 5875] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5875, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=11 /* 0.11 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5876 attached , child_tidptr=0x55557affa750) = 5876 [pid 5876] set_robust_list(0x55557affa760, 24) = 0 [pid 5876] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5876] setpgid(0, 0) = 0 [pid 5876] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5876] write(3, "1000", 4) = 4 [pid 5876] close(3) = 0 executing program [pid 5876] write(1, "executing program\n", 18) = 18 [ 89.058940][ T5875] overlay: filesystem on ./file0 not supported as upperdir [pid 5876] memfd_create("syzkaller", 0) = 3 [pid 5876] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000 [pid 5876] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5876] munmap(0x7fb126c00000, 138412032) = 0 [pid 5876] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5876] close(3) = 0 [pid 5876] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5876] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5876] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 5876] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5876] mount(NULL, "./file0", "overlay", MS_POSIXACL, "workdir=./file0,lowerdir=.,upperdir=./bus,,") = -1 EINVAL (Invalid argument) [pid 5876] exit_group(0) = ? [pid 5876] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5876, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5877 attached , child_tidptr=0x55557affa750) = 5877 [pid 5877] set_robust_list(0x55557affa760, 24) = 0 [ 89.321911][ T5876] overlay: filesystem on ./file0 not supported as upperdir [pid 5877] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5877] setpgid(0, 0) = 0 [pid 5877] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5877] write(3, "1000", 4) = 4 [pid 5877] close(3) = 0 executing program [pid 5877] write(1, "executing program\n", 18) = 18 [pid 5877] memfd_create("syzkaller", 0) = 3 [pid 5877] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb126c00000