./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor332409252 <...> Warning: Permanently added '10.128.1.70' (ED25519) to the list of known hosts. execve("./syz-executor332409252", ["./syz-executor332409252"], 0x7ffd82e34ba0 /* 10 vars */) = 0 brk(NULL) = 0x555585277000 brk(0x555585277e00) = 0x555585277e00 arch_prctl(ARCH_SET_FS, 0x555585277480) = 0 set_tid_address(0x555585277750) = 5848 set_robust_list(0x555585277760, 24) = 0 rseq(0x555585277da0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor332409252", 4096) = 27 getrandom("\x37\xbf\x00\x70\x40\x95\x29\x7c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555585277e00 brk(0x555585298e00) = 0x555585298e00 brk(0x555585299000) = 0x555585299000 mprotect(0x7fe1a4478000, 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=0x7fe1a43caa60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fe1a43d3900}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fe1a43caa60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fe1a43d3900}, 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 5849 attached [pid 5849] set_robust_list(0x555585277760, 24 [pid 5848] <... clone resumed>, child_tidptr=0x555585277750) = 5849 [pid 5849] <... set_robust_list resumed>) = 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(3executing program ) = 0 [pid 5849] write(1, "executing program\n", 18) = 18 [pid 5849] memfd_create("syzkaller", 0) = 3 [pid 5849] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [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(0x7fe19be00000, 138412032) = 0 [pid 5849] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5849] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5849] close(3) = 0 [pid 5849] close(4) = 0 [pid 5849] mkdir("./file0", 0777) = 0 [ 79.406577][ T5849] loop0: detected capacity change from 0 to 32768 [ 79.436523][ T5849] (syz-executor332,5849,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xb3775c19, computed 0x2dd1c265. Applying ECC. [ 79.452562][ T5849] (syz-executor332,5849,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xb3775c19, computed 0x2dd1c265. Applying ECC. [ 79.482457][ T5849] JBD2: Ignoring recovery information on journal [pid 5849] mount("/dev/loop0", "./file0", "ocfs2", MS_NOSUID|MS_NOEXEC|MS_STRICTATIME, "journal_async_commit,heartbeat=none,usrquota,barrier=00000000000000000007,heartbeat=none,inode64,") = 0 [pid 5849] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5849] chdir("./file0") = 0 [pid 5849] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5849] mkdir("./file0", 0777) = 0 [pid 5849] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [ 79.510059][ T5849] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. [pid 5849] mkdir("./file1", 000) = 0 [pid 5849] mkdir("./bus", 000) = 0 [ 79.591205][ T5849] [ 79.593659][ T5849] ====================================================== [ 79.600684][ T5849] WARNING: possible circular locking dependency detected [ 79.607704][ T5849] 6.16.0-next-20250731-syzkaller #0 Not tainted [ 79.613933][ T5849] ------------------------------------------------------ [ 79.620943][ T5849] syz-executor332/5849 is trying to acquire lock: [ 79.627383][ T5849] ffff8880329d4618 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_setattr+0x969/0x1b40 [ 79.636360][ T5849] [ 79.636360][ T5849] but task is already holding lock: [ 79.643716][ T5849] ffff88807e063120 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_setattr+0x95a/0x1b40 [ 79.653011][ T5849] [ 79.653011][ T5849] which lock already depends on the new lock. [ 79.653011][ T5849] [ 79.663410][ T5849] [ 79.663410][ T5849] the existing dependency chain (in reverse order) is: [ 79.672443][ T5849] [ 79.672443][ T5849] -> #4 (&oi->ip_alloc_sem){+.+.}-{4:4}: [ 79.680276][ T5849] lock_acquire+0x120/0x360 [ 79.685313][ T5849] down_write+0x96/0x1f0 [ 79.690103][ T5849] ocfs2_try_remove_refcount_tree+0xb6/0x320 [ 79.696612][ T5849] ocfs2_xattr_set+0x595/0x11f0 [ 79.701999][ T5849] ocfs2_set_acl+0x701/0x7b0 [ 79.707092][ T5849] ocfs2_iop_set_acl+0x1aa/0x2a0 [ 79.712532][ T5849] vfs_remove_acl+0x48c/0x700 [ 79.717714][ T5849] ovl_workdir_create+0x594/0x8b0 [ 79.723239][ T5849] ovl_get_workdir+0x32f/0x17c0 [ 79.728596][ T5849] ovl_fill_super+0x1365/0x35b0 [ 79.733962][ T5849] get_tree_nodev+0xb8/0x150 [ 79.739068][ T5849] vfs_get_tree+0x8f/0x2b0 [ 79.744013][ T5849] do_new_mount+0x2a2/0x9e0 [ 79.749197][ T5849] __se_sys_mount+0x317/0x410 [ 79.754394][ T5849] do_syscall_64+0xfa/0x3b0 [ 79.759604][ T5849] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.766018][ T5849] [ 79.766018][ T5849] -> #3 (&oi->ip_xattr_sem){++++}-{4:4}: [ 79.773905][ T5849] lock_acquire+0x120/0x360 [ 79.778913][ T5849] down_read+0x46/0x2e0 [ 79.783582][ T5849] ocfs2_init_acl+0x2f9/0x720 [ 79.788762][ T5849] ocfs2_mknod+0x1321/0x2050 [ 79.793856][ T5849] ocfs2_mkdir+0x191/0x440 [ 79.798798][ T5849] vfs_mkdir+0x303/0x510 [ 79.803660][ T5849] do_mkdirat+0x247/0x590 [ 79.808511][ T5849] __x64_sys_mkdir+0x6c/0x80 [ 79.813613][ T5849] do_syscall_64+0xfa/0x3b0 [ 79.818631][ T5849] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.825134][ T5849] [ 79.825134][ T5849] -> #2 (jbd2_handle){.+.+}-{0:0}: [ 79.832415][ T5849] lock_acquire+0x120/0x360 [ 79.837454][ T5849] start_this_handle+0x1fa7/0x21c0 [ 79.843074][ T5849] jbd2__journal_start+0x2c1/0x5b0 [ 79.848698][ T5849] jbd2_journal_start+0x2a/0x40 [ 79.854075][ T5849] ocfs2_start_trans+0x376/0x6d0 [ 79.859591][ T5849] ocfs2_modify_bh+0xe8/0x470 [ 79.864786][ T5849] ocfs2_local_read_info+0x1465/0x17e0 [ 79.870750][ T5849] dquot_load_quota_sb+0x791/0xbd0 [ 79.876393][ T5849] dquot_load_quota_inode+0x2e1/0x5d0 [ 79.882272][ T5849] ocfs2_enable_quotas+0x1c6/0x450 [ 79.888094][ T5849] ocfs2_fill_super+0x50e7/0x63a0 [ 79.893720][ T5849] get_tree_bdev_flags+0x40b/0x4d0 [ 79.899352][ T5849] vfs_get_tree+0x8f/0x2b0 [ 79.904392][ T5849] do_new_mount+0x2a2/0x9e0 [ 79.909401][ T5849] __se_sys_mount+0x317/0x410 [ 79.914579][ T5849] do_syscall_64+0xfa/0x3b0 [ 79.919590][ T5849] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.926013][ T5849] [ 79.926013][ T5849] -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: [ 79.934522][ T5849] lock_acquire+0x120/0x360 [ 79.939573][ T5849] down_read+0x46/0x2e0 [ 79.944226][ T5849] ocfs2_start_trans+0x36a/0x6d0 [ 79.949673][ T5849] ocfs2_modify_bh+0xe8/0x470 [ 79.954854][ T5849] ocfs2_local_read_info+0x1465/0x17e0 [ 79.960827][ T5849] dquot_load_quota_sb+0x791/0xbd0 [ 79.966454][ T5849] dquot_load_quota_inode+0x2e1/0x5d0 [ 79.972435][ T5849] ocfs2_enable_quotas+0x1c6/0x450 [ 79.978058][ T5849] ocfs2_fill_super+0x50e7/0x63a0 [ 79.983591][ T5849] get_tree_bdev_flags+0x40b/0x4d0 [ 79.989225][ T5849] vfs_get_tree+0x8f/0x2b0 [ 79.994151][ T5849] do_new_mount+0x2a2/0x9e0 [ 79.999157][ T5849] __se_sys_mount+0x317/0x410 [ 80.004336][ T5849] do_syscall_64+0xfa/0x3b0 [ 80.009344][ T5849] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 80.015734][ T5849] [ 80.015734][ T5849] -> #0 (sb_internal#2){.+.+}-{0:0}: [ 80.023204][ T5849] validate_chain+0xb9b/0x2140 [ 80.028521][ T5849] __lock_acquire+0xab9/0xd20 [ 80.033883][ T5849] lock_acquire+0x120/0x360 [ 80.038893][ T5849] ocfs2_start_trans+0x26b/0x6d0 [ 80.044332][ T5849] ocfs2_setattr+0x969/0x1b40 [ 80.049520][ T5849] notify_change+0xb36/0xe40 [ 80.054616][ T5849] ovl_workdir_create+0x722/0x8b0 [ 80.060160][ T5849] ovl_get_workdir+0x32f/0x17c0 [ 80.065532][ T5849] ovl_fill_super+0x1365/0x35b0 [ 80.071246][ T5849] get_tree_nodev+0xb8/0x150 [ 80.076390][ T5849] vfs_get_tree+0x8f/0x2b0 [ 80.081318][ T5849] do_new_mount+0x2a2/0x9e0 [ 80.086374][ T5849] __se_sys_mount+0x317/0x410 [ 80.091563][ T5849] do_syscall_64+0xfa/0x3b0 [ 80.096585][ T5849] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 80.103010][ T5849] [ 80.103010][ T5849] other info that might help us debug this: [ 80.103010][ T5849] [ 80.113225][ T5849] Chain exists of: [ 80.113225][ T5849] sb_internal#2 --> &oi->ip_xattr_sem --> &oi->ip_alloc_sem [ 80.113225][ T5849] [ 80.126424][ T5849] Possible unsafe locking scenario: [ 80.126424][ T5849] [ 80.133877][ T5849] CPU0 CPU1 [ 80.139226][ T5849] ---- ---- [ 80.144571][ T5849] lock(&oi->ip_alloc_sem); [ 80.149145][ T5849] lock(&oi->ip_xattr_sem); [ 80.156236][ T5849] lock(&oi->ip_alloc_sem); [ 80.163341][ T5849] rlock(sb_internal#2); [ 80.167656][ T5849] [ 80.167656][ T5849] *** DEADLOCK *** [ 80.167656][ T5849] [ 80.175785][ T5849] 4 locks held by syz-executor332/5849: [ 80.181346][ T5849] #0: ffff888032c620e0 (&type->s_umount_key#42/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970 [ 80.191518][ T5849] #1: ffff8880329d4428 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 80.200749][ T5849] #2: ffff88807e063480 (&sb->s_type->i_mutex_key#17){+.+.}-{4:4}, at: ovl_workdir_create+0x6a8/0x8b0 [ 80.211694][ T5849] #3: ffff88807e063120 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_setattr+0x95a/0x1b40 [ 80.221426][ T5849] [ 80.221426][ T5849] stack backtrace: [ 80.227321][ T5849] CPU: 0 UID: 0 PID: 5849 Comm: syz-executor332 Not tainted 6.16.0-next-20250731-syzkaller #0 PREEMPT(full) [ 80.227335][ T5849] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 80.227345][ T5849] Call Trace: [ 80.227354][ T5849] [ 80.227359][ T5849] dump_stack_lvl+0x189/0x250 [ 80.227377][ T5849] ? __pfx_dump_stack_lvl+0x10/0x10 [ 80.227388][ T5849] ? __pfx__printk+0x10/0x10 [ 80.227401][ T5849] ? print_lock_name+0xde/0x100 [ 80.227413][ T5849] print_circular_bug+0x2ee/0x310 [ 80.227424][ T5849] check_noncircular+0x134/0x160 [ 80.227435][ T5849] validate_chain+0xb9b/0x2140 [ 80.227444][ T5849] ? lockdep_unlock+0x89/0x120 [ 80.227459][ T5849] __lock_acquire+0xab9/0xd20 [ 80.227474][ T5849] ? ocfs2_setattr+0x969/0x1b40 [ 80.227486][ T5849] lock_acquire+0x120/0x360 [ 80.227499][ T5849] ? ocfs2_setattr+0x969/0x1b40 [ 80.227513][ T5849] ? do_raw_spin_unlock+0x122/0x240 [ 80.227524][ T5849] ocfs2_start_trans+0x26b/0x6d0 [ 80.227534][ T5849] ? ocfs2_setattr+0x969/0x1b40 [ 80.227548][ T5849] ? __pfx_ocfs2_start_trans+0x10/0x10 [ 80.227557][ T5849] ? setattr_prepare+0x1e7/0xac0 [ 80.227570][ T5849] ocfs2_setattr+0x969/0x1b40 [ 80.227585][ T5849] ? __pfx_ocfs2_setattr+0x10/0x10 [ 80.227598][ T5849] ? ktime_get_coarse_real_ts64_mg+0x52/0x1e0 [ 80.227610][ T5849] ? seqcount_lockdep_reader_access+0x175/0x1c0 [ 80.227628][ T5849] ? ktime_get_coarse_real_ts64_mg+0x1be/0x1e0 [ 80.227648][ T5849] ? current_time+0x222/0x370 [ 80.227662][ T5849] ? evm_inode_setattr+0x1bd/0x7d0 [ 80.227676][ T5849] ? __pfx_current_time+0x10/0x10 [ 80.227692][ T5849] ? try_break_deleg+0x79/0x130 [ 80.227707][ T5849] ? __pfx_ocfs2_setattr+0x10/0x10 [ 80.227728][ T5849] notify_change+0xb36/0xe40 [ 80.227751][ T5849] ovl_workdir_create+0x722/0x8b0 [ 80.227778][ T5849] ? __pfx_ovl_workdir_create+0x10/0x10 [ 80.227804][ T5849] ? mnt_get_write_access+0x223/0x2a0 [ 80.227823][ T5849] ovl_get_workdir+0x32f/0x17c0 [ 80.227840][ T5849] ? __pfx_ovl_get_workdir+0x10/0x10 [ 80.227852][ T5849] ? __lock_acquire+0xab9/0xd20 [ 80.227867][ T5849] ? do_raw_spin_lock+0x121/0x290 [ 80.227879][ T5849] ? do_raw_spin_unlock+0x122/0x240 [ 80.227889][ T5849] ? _raw_spin_unlock+0x28/0x50 [ 80.227901][ T5849] ? ovl_inuse_trylock+0xae/0xf0 [ 80.227913][ T5849] ovl_fill_super+0x1365/0x35b0 [ 80.227927][ T5849] ? rcu_is_watching+0x15/0xb0 [ 80.227945][ T5849] ? __pfx_ovl_fill_super+0x10/0x10 [ 80.227956][ T5849] ? __mutex_unlock_slowpath+0x1a1/0x760 [ 80.227971][ T5849] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 80.227986][ T5849] ? __raw_spin_lock_init+0x45/0x100 [ 80.227999][ T5849] ? sget_fc+0x962/0xa40 [ 80.228009][ T5849] ? __pfx_set_anon_super_fc+0x10/0x10 [ 80.228020][ T5849] ? __pfx_ovl_fill_super+0x10/0x10 [ 80.228031][ T5849] get_tree_nodev+0xb8/0x150 [ 80.228043][ T5849] vfs_get_tree+0x8f/0x2b0 [ 80.228055][ T5849] do_new_mount+0x2a2/0x9e0 [ 80.228069][ T5849] ? ns_capable+0x8a/0xf0 [ 80.228083][ T5849] ? __pfx_do_new_mount+0x10/0x10 [ 80.228095][ T5849] ? path_mount+0x61c/0xfe0 [ 80.228107][ T5849] ? user_path_at+0x44/0x60 [ 80.228118][ T5849] __se_sys_mount+0x317/0x410 [ 80.228133][ T5849] ? __pfx___se_sys_mount+0x10/0x10 [ 80.228146][ T5849] ? rcu_is_watching+0x15/0xb0 [ 80.228161][ T5849] ? __x64_sys_mount+0x20/0xc0 [ 80.228174][ T5849] do_syscall_64+0xfa/0x3b0 [ 80.228189][ T5849] ? lockdep_hardirqs_on+0x9c/0x150 [ 80.228202][ T5849] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 80.228211][ T5849] ? clear_bhb_loop+0x60/0xb0 [ 80.228222][ T5849] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 80.228232][ T5849] RIP: 0033:0x7fe1a4400c19 [ 80.228246][ T5849] 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 [ 80.228282][ T5849] RSP: 002b:00007fff2b362738 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 80.228294][ T5849] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe1a4400c19 [ 80.228301][ T5849] RDX: 0000200000000340 RSI: 0000200000000600 RDI: 0000000000000000 [ 80.228307][ T5849] RBP: 0000000000000000 R08: 0000200000000240 R09: 00007fff2b362770 [ 80.228314][ T5849] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff2b362770 [ 80.228320][ T5849] R13: 00007fff2b3629f8 R14: 431bde82d7b634db R15: 00007fe1a444903b [ 80.228330][ T5849] [pid 5849] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=25 /* 0.25 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 5853 attached , child_tidptr=0x555585277750) = 5853 [ 80.646730][ T5849] overlayfs: upper fs does not support tmpfile. [ 80.653775][ T5849] overlayfs: upper fs does not support RENAME_WHITEOUT. [ 80.661504][ T5849] overlayfs: upper fs missing required features. [pid 5853] set_robust_list(0x555585277760, 24) = 0 [pid 5853] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5853] setpgid(0, 0) = 0 [pid 5853] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5853] write(3, "1000", 4) = 4 [pid 5853] close(3) = 0 [pid 5853] write(1, "executing program\n", 18executing program ) = 18 [pid 5853] memfd_create("syzkaller", 0) = 3 [pid 5853] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5853] 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 5853] munmap(0x7fe19be00000, 138412032) = 0 [pid 5853] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5853] close(3) = 0 [pid 5853] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5853] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5853] mkdir("./file1", 000) = 0 [pid 5853] mkdir("./bus", 000) = 0 [pid 5853] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = 0 [pid 5853] exit_group(0) = ? [pid 5853] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5853, si_uid=0, si_status=0, si_utime=2 /* 0.02 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 5854 attached , child_tidptr=0x555585277750) = 5854 [pid 5854] set_robust_list(0x555585277760, 24) = 0 [pid 5854] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5854] setpgid(0, 0) = 0 [pid 5854] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5854] write(3, "1000", 4) = 4 [pid 5854] close(3) = 0 [pid 5854] write(1, "executing program\n", 18executing program ) = 18 [pid 5854] memfd_create("syzkaller", 0) = 3 [pid 5854] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5854] 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 5854] munmap(0x7fe19be00000, 138412032) = 0 [pid 5854] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5854] close(3) = 0 [pid 5854] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5854] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5854] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5854] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5854] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5854] exit_group(0) = ? [pid 5854] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5854, 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 5855 attached , child_tidptr=0x555585277750) = 5855 [ 81.225958][ T5854] overlay: filesystem on ./bus not supported as upperdir [pid 5855] set_robust_list(0x555585277760, 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) = 0x7fe19be00000 [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5855] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5855] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=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 5857 attached [pid 5857] set_robust_list(0x555585277760, 24 [pid 5848] <... clone resumed>, child_tidptr=0x555585277750) = 5857 [pid 5857] <... set_robust_list resumed>) = 0 [ 81.529669][ T5855] overlay: filesystem on ./bus not supported as upperdir [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) = 0x7fe19be00000 [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5857] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5857] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=7 /* 0.07 s */, si_stime=11 /* 0.11 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, child_tidptr=0x555585277750) = 5859 ./strace-static-x86_64: Process 5859 attached [ 81.855962][ T5857] overlay: filesystem on ./bus not supported as upperdir [pid 5859] set_robust_list(0x555585277760, 24) = 0 [pid 5859] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5859] setpgid(0, 0) = 0 [pid 5859] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5859] write(3, "1000", 4) = 4 [pid 5859] close(3) = 0 executing program [pid 5859] write(1, "executing program\n", 18) = 18 [pid 5859] memfd_create("syzkaller", 0) = 3 [pid 5859] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5859] 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 5859] munmap(0x7fe19be00000, 138412032) = 0 [pid 5859] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5859] close(3) = 0 [pid 5859] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5859] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5859] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5859] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5859] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5859] exit_group(0) = ? [pid 5859] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5859, 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 5862 attached , child_tidptr=0x555585277750) = 5862 [pid 5862] set_robust_list(0x555585277760, 24) = 0 [pid 5862] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5862] setpgid(0, 0) = 0 [pid 5862] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5862] write(3, "1000", 4) = 4 [pid 5862] close(3) = 0 executing program [pid 5862] write(1, "executing program\n", 18) = 18 [ 82.166390][ T5859] overlay: filesystem on ./bus not supported as upperdir [pid 5862] memfd_create("syzkaller", 0) = 3 [pid 5862] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5862] 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 5862] munmap(0x7fe19be00000, 138412032) = 0 [pid 5862] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5862] close(3) = 0 [pid 5862] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5862] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5862] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5862] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5862] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5862] exit_group(0) = ? [pid 5862] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5862, 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 5863 attached , child_tidptr=0x555585277750) = 5863 [pid 5863] set_robust_list(0x555585277760, 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 executing program [pid 5863] write(1, "executing program\n", 18) = 18 [pid 5863] memfd_create("syzkaller", 0) = 3 [pid 5863] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [ 82.405080][ T5862] overlay: filesystem on ./bus not supported as upperdir [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5863] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5863] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=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) [ 82.628389][ T5863] overlay: filesystem on ./bus not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5864 attached , child_tidptr=0x555585277750) = 5864 [pid 5864] set_robust_list(0x555585277760, 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 [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) = 0x7fe19be00000 [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5864] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5864] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=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 5865 attached , child_tidptr=0x555585277750) = 5865 [pid 5865] set_robust_list(0x555585277760, 24) = 0 [ 82.953523][ T5864] overlay: filesystem on ./bus not supported as upperdir [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) = 0x7fe19be00000 [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5865] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5865] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=2 /* 0.02 s */, si_stime=11 /* 0.11 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 5868 attached , child_tidptr=0x555585277750) = 5868 [pid 5868] set_robust_list(0x555585277760, 24) = 0 [pid 5868] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5868] setpgid(0, 0) = 0 [ 83.216917][ T5865] overlay: filesystem on ./bus not supported as upperdir [pid 5868] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5868] write(3, "1000", 4) = 4 [pid 5868] close(3) = 0 [pid 5868] write(1, "executing program\n", 18executing program ) = 18 [pid 5868] memfd_create("syzkaller", 0) = 3 [pid 5868] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5868] 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 5868] munmap(0x7fe19be00000, 138412032) = 0 [pid 5868] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5868] close(3) = 0 [pid 5868] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5868] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5868] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5868] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5868] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5868] exit_group(0) = ? [pid 5868] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5868, 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 5870 attached , child_tidptr=0x555585277750) = 5870 [pid 5870] set_robust_list(0x555585277760, 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) = 0x7fe19be00000 [ 83.489356][ T5868] overlay: filesystem on ./bus not supported as upperdir [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5870] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5870] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 83.708206][ T5870] overlay: filesystem on ./bus not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5871 attached , child_tidptr=0x555585277750) = 5871 [pid 5871] set_robust_list(0x555585277760, 24) = 0 [pid 5871] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [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) = 0x7fe19be00000 [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5871] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5871] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=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 5872 attached , child_tidptr=0x555585277750) = 5872 [ 84.005730][ T5871] overlay: filesystem on ./bus not supported as upperdir [pid 5872] set_robust_list(0x555585277760, 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) = 0x7fe19be00000 [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5872] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5872] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=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, child_tidptr=0x555585277750) = 5873 ./strace-static-x86_64: Process 5873 attached [ 84.274775][ T5872] overlay: filesystem on ./bus not supported as upperdir [pid 5873] set_robust_list(0x555585277760, 24) = 0 [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 executing program [pid 5873] write(1, "executing program\n", 18) = 18 [pid 5873] memfd_create("syzkaller", 0) = 3 [pid 5873] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5873] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5873] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=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 5874 attached , child_tidptr=0x555585277750) = 5874 [pid 5874] set_robust_list(0x555585277760, 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 [ 84.545777][ T5873] overlay: filesystem on ./bus not supported as upperdir 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) = 0x7fe19be00000 [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5874] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5874] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 84.860115][ T5874] overlay: filesystem on ./bus 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=0x555585277750) = 5875 [pid 5875] set_robust_list(0x555585277760, 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 [pid 5875] write(1, "executing program\n", 18executing program ) = 18 [pid 5875] memfd_create("syzkaller", 0) = 3 [pid 5875] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5875] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5875] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=2 /* 0.02 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) [ 85.148250][ T5875] overlay: filesystem on ./bus not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5876 attached , child_tidptr=0x555585277750) = 5876 [pid 5876] set_robust_list(0x555585277760, 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 [pid 5876] memfd_create("syzkaller", 0) = 3 [pid 5876] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [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(0x7fe19be00000, 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("./file1", 000) = -1 EEXIST (File exists) [pid 5876] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5876] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -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=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 5877 attached , child_tidptr=0x555585277750) = 5877 [pid 5877] set_robust_list(0x555585277760, 24) = 0 [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 [ 85.427039][ T5876] overlay: filesystem on ./bus not supported as upperdir [pid 5877] write(3, "1000", 4) = 4 [pid 5877] close(3executing program ) = 0 [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) = 0x7fe19be00000 [pid 5877] 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 5877] munmap(0x7fe19be00000, 138412032) = 0 [pid 5877] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5877] close(3) = 0 [pid 5877] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5877] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5877] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5877] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5877] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5877] exit_group(0) = ? [pid 5877] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5877, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- [ 85.697322][ T5877] overlay: filesystem on ./bus 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 5878 attached , child_tidptr=0x555585277750) = 5878 [pid 5878] set_robust_list(0x555585277760, 24) = 0 [pid 5878] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5878] setpgid(0, 0) = 0 [pid 5878] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5878] write(3, "1000", 4) = 4 [pid 5878] close(3) = 0 [pid 5878] write(1, "executing program\n", 18executing program ) = 18 [pid 5878] memfd_create("syzkaller", 0) = 3 [pid 5878] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5878] 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 5878] munmap(0x7fe19be00000, 138412032) = 0 [pid 5878] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5878] close(3) = 0 [pid 5878] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5878] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5878] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5878] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5878] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5878] exit_group(0) = ? [pid 5878] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5878, 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) [ 86.051851][ T5878] overlay: filesystem on ./bus not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5879 attached , child_tidptr=0x555585277750) = 5879 [pid 5879] set_robust_list(0x555585277760, 24) = 0 [pid 5879] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5879] setpgid(0, 0) = 0 [pid 5879] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5879] write(3, "1000", 4) = 4 [pid 5879] close(3) = 0 [pid 5879] write(1, "executing program\n", 18executing program ) = 18 [pid 5879] memfd_create("syzkaller", 0) = 3 [pid 5879] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5879] 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 5879] munmap(0x7fe19be00000, 138412032) = 0 [pid 5879] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5879] close(3) = 0 [pid 5879] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5879] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5879] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5879] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5879] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5879] exit_group(0) = ? [pid 5879] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5879, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- [ 86.380135][ T5879] overlay: filesystem on ./bus 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, child_tidptr=0x555585277750) = 5880 ./strace-static-x86_64: Process 5880 attached [pid 5880] set_robust_list(0x555585277760, 24) = 0 [pid 5880] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5880] setpgid(0, 0) = 0 [pid 5880] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5880] write(3, "1000", 4) = 4 [pid 5880] close(3) = 0 executing program [pid 5880] write(1, "executing program\n", 18) = 18 [pid 5880] memfd_create("syzkaller", 0) = 3 [pid 5880] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5880] 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 5880] munmap(0x7fe19be00000, 138412032) = 0 [pid 5880] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5880] close(3) = 0 [pid 5880] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5880] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5880] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5880] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5880] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5880] exit_group(0) = ? [pid 5880] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5880, 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) [ 86.703166][ T5880] overlay: filesystem on ./bus not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5882 attached , child_tidptr=0x555585277750) = 5882 [pid 5882] set_robust_list(0x555585277760, 24) = 0 [pid 5882] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5882] setpgid(0, 0) = 0 [pid 5882] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [ 86.754508][ T929] cfg80211: failed to load regulatory.db [pid 5882] write(3, "1000", 4) = 4 [pid 5882] close(3) = 0 [pid 5882] write(1, "executing program\n", 18executing program ) = 18 [pid 5882] memfd_create("syzkaller", 0) = 3 [pid 5882] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5882] 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 5882] munmap(0x7fe19be00000, 138412032) = 0 [pid 5882] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5882] close(3) = 0 [pid 5882] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5882] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5882] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5882] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5882] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5882] exit_group(0) = ? [pid 5882] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5882, 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) [ 87.031682][ T5882] overlay: filesystem on ./bus not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5883 attached , child_tidptr=0x555585277750) = 5883 [pid 5883] set_robust_list(0x555585277760, 24) = 0 [pid 5883] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5883] setpgid(0, 0) = 0 [pid 5883] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5883] write(3, "1000", 4) = 4 [pid 5883] close(3) = 0 [pid 5883] write(1, "executing program\n", 18executing program ) = 18 [pid 5883] memfd_create("syzkaller", 0) = 3 [pid 5883] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5883] 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 5883] munmap(0x7fe19be00000, 138412032) = 0 [pid 5883] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5883] close(3) = 0 [pid 5883] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5883] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5883] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5883] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5883] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5883] exit_group(0) = ? [pid 5883] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5883, 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 5884 attached , child_tidptr=0x555585277750) = 5884 [pid 5884] set_robust_list(0x555585277760, 24) = 0 [pid 5884] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5884] setpgid(0, 0) = 0 [pid 5884] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5884] write(3, "1000", 4) = 4 [pid 5884] close(3) = 0 executing program [pid 5884] write(1, "executing program\n", 18) = 18 [pid 5884] memfd_create("syzkaller", 0) = 3 [pid 5884] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [ 87.352491][ T5883] overlay: filesystem on ./bus not supported as upperdir [pid 5884] 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 5884] munmap(0x7fe19be00000, 138412032) = 0 [pid 5884] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5884] close(3) = 0 [pid 5884] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5884] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5884] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5884] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5884] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5884] exit_group(0) = ? [pid 5884] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5884, si_uid=0, si_status=0, si_utime=2 /* 0.02 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) [ 87.602543][ T5884] overlay: filesystem on ./bus not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5885 attached , child_tidptr=0x555585277750) = 5885 [pid 5885] set_robust_list(0x555585277760, 24) = 0 [pid 5885] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5885] setpgid(0, 0) = 0 [pid 5885] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5885] write(3, "1000", 4) = 4 [pid 5885] close(3) = 0 [pid 5885] write(1, "executing program\n", 18executing program ) = 18 [pid 5885] memfd_create("syzkaller", 0) = 3 [pid 5885] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5885] 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 5885] munmap(0x7fe19be00000, 138412032) = 0 [pid 5885] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5885] close(3) = 0 [pid 5885] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5885] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5885] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5885] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5885] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5885] exit_group(0) = ? [pid 5885] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5885, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 87.957039][ T5885] overlay: filesystem on ./bus not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5886 attached , child_tidptr=0x555585277750) = 5886 [pid 5886] set_robust_list(0x555585277760, 24) = 0 [pid 5886] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5886] setpgid(0, 0) = 0 [pid 5886] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5886] write(3, "1000", 4) = 4 [pid 5886] close(3) = 0 executing program [pid 5886] write(1, "executing program\n", 18) = 18 [pid 5886] memfd_create("syzkaller", 0) = 3 [pid 5886] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5886] 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 5886] munmap(0x7fe19be00000, 138412032) = 0 [pid 5886] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5886] close(3) = 0 [pid 5886] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5886] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5886] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5886] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5886] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5886] exit_group(0) = ? [pid 5886] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5886, 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 5887 attached , child_tidptr=0x555585277750) = 5887 [pid 5887] set_robust_list(0x555585277760, 24) = 0 [ 88.289693][ T5886] overlay: filesystem on ./bus not supported as upperdir [pid 5887] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5887] setpgid(0, 0) = 0 [pid 5887] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5887] write(3, "1000", 4) = 4 [pid 5887] close(3executing program ) = 0 [pid 5887] write(1, "executing program\n", 18) = 18 [pid 5887] memfd_create("syzkaller", 0) = 3 [pid 5887] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5887] 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 5887] munmap(0x7fe19be00000, 138412032) = 0 [pid 5887] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5887] close(3) = 0 [pid 5887] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5887] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5887] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5887] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5887] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5887] exit_group(0) = ? [pid 5887] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5887, si_uid=0, si_status=0, si_utime=2 /* 0.02 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 5888 attached [pid 5888] set_robust_list(0x555585277760, 24 [pid 5848] <... clone resumed>, child_tidptr=0x555585277750) = 5888 [pid 5888] <... set_robust_list resumed>) = 0 [pid 5888] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5888] setpgid(0, 0) = 0 [pid 5888] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [ 88.599324][ T5887] overlay: filesystem on ./bus not supported as upperdir [pid 5888] write(3, "1000", 4) = 4 [pid 5888] close(3) = 0 executing program [pid 5888] write(1, "executing program\n", 18) = 18 [pid 5888] memfd_create("syzkaller", 0) = 3 [pid 5888] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5888] 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 5888] munmap(0x7fe19be00000, 138412032) = 0 [pid 5888] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5888] close(3) = 0 [pid 5888] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5888] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5888] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5888] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5888] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5888] exit_group(0) = ? [pid 5888] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5888, 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) [ 88.881796][ T5888] overlay: filesystem on ./bus not supported as upperdir clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5889 attached , child_tidptr=0x555585277750) = 5889 [pid 5889] set_robust_list(0x555585277760, 24) = 0 [pid 5889] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5889] setpgid(0, 0) = 0 [pid 5889] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5889] write(3, "1000", 4) = 4 [pid 5889] close(3) = 0 executing program [pid 5889] write(1, "executing program\n", 18) = 18 [pid 5889] memfd_create("syzkaller", 0) = 3 [pid 5889] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5889] 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 5889] munmap(0x7fe19be00000, 138412032) = 0 [pid 5889] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5889] close(3) = 0 [pid 5889] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5889] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5889] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5889] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5889] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5889] exit_group(0) = ? [pid 5889] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5889, 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 5890 attached , child_tidptr=0x555585277750) = 5890 [ 89.189056][ T5889] overlay: filesystem on ./bus not supported as upperdir [pid 5890] set_robust_list(0x555585277760, 24) = 0 [pid 5890] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5890] setpgid(0, 0) = 0 [pid 5890] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5890] write(3, "1000", 4) = 4 [pid 5890] close(3) = 0 executing program [pid 5890] write(1, "executing program\n", 18) = 18 [pid 5890] memfd_create("syzkaller", 0) = 3 [pid 5890] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000 [pid 5890] 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 5890] munmap(0x7fe19be00000, 138412032) = 0 [pid 5890] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5890] close(3) = 0 [pid 5890] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 5890] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5890] mkdir("./file1", 000) = -1 EEXIST (File exists) [pid 5890] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5890] mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,workdir=./bus,lowerdir=./file0,") = -1 EINVAL (Invalid argument) [pid 5890] exit_group(0) = ? [pid 5890] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5890, 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, child_tidptr=0x555585277750) = 5891 ./strace-static-x86_64: Process 5891 attached [ 89.517115][ T5890] overlay: filesystem on ./bus not supported as upperdir [pid 5891] set_robust_list(0x555585277760, 24) = 0 [pid 5891] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5891] setpgid(0, 0) = 0 [pid 5891] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5891] write(3, "1000", 4) = 4 [pid 5891] close(3) = 0 [pid 5891] write(1, "executing program\n", 18) = 18 executing program [pid 5891] memfd_create("syzkaller", 0) = 3 [pid 5891] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe19be00000