./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor44833132
<...>
DUID 00:04:e6:d8:3e:4c:c1:15:84:42:dc:00:60:8c:e3:5f:26:b4
forked to background, child pid 5489
[ 39.283520][ T5490] 8021q: adding VLAN 0 to HW filter on device bond0
[ 39.301945][ T5490] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: OK
syzkaller
Warning: Permanently added '10.128.10.49' (ED25519) to the list of known hosts.
execve("./syz-executor44833132", ["./syz-executor44833132"], 0x7ffc18c65150 /* 10 vars */) = 0
brk(NULL) = 0x555570da9000
brk(0x555570da9e00) = 0x555570da9e00
arch_prctl(ARCH_SET_FS, 0x555570da9480) = 0
set_tid_address(0x555570da9750) = 5820
set_robust_list(0x555570da9760, 24) = 0
rseq(0x555570da9da0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor44833132", 4096) = 26
getrandom("\x06\x54\x3c\x18\xd8\x64\x86\xe5", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x555570da9e00
brk(0x555570dcae00) = 0x555570dcae00
brk(0x555570dcb000) = 0x555570dcb000
mprotect(0x7fab1c1ba000, 16384, PROT_READ) = 0
mmap(0x3ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3ffffffff000
mmap(0x400000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400000000000
mmap(0x400001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400001000000
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=0x7fab1c10ca60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fab1c1154e0}, NULL, 8) = 0
rt_sigaction(SIGBUS, {sa_handler=0x7fab1c10ca60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fab1c1154e0}, 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, child_tidptr=0x555570da9750) = 5821
./strace-static-x86_64: Process 5821 attached
[pid 5821] set_robust_list(0x555570da9760, 24) = 0
[pid 5821] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5821] setpgid(0, 0) = 0
[pid 5821] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5821] write(3, "1000", 4) = 4
[pid 5821] close(3) = 0
executing program
[pid 5821] write(1, "executing program\n", 18) = 18
[pid 5821] memfd_create("syzkaller", 0) = 3
[pid 5821] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5821] 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 5821] munmap(0x7fab13c00000, 138412032) = 0
[pid 5821] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5821] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5821] close(3) = 0
[pid 5821] close(4) = 0
[pid 5821] mkdir("./file1", 0777) = 0
syzkaller login: [ 61.618897][ T5821] loop0: detected capacity change from 0 to 32768
[ 61.664492][ T5821] =======================================================
[ 61.664492][ T5821] WARNING: The mand mount option has been deprecated and
[ 61.664492][ T5821] and is ignored by this kernel. Remove the mand
[ 61.664492][ T5821] option from the mount to silence this warning.
[ 61.664492][ T5821] =======================================================
[pid 5821] mount("/dev/loop0", "./file1", "ocfs2", MS_SYNCHRONOUS|MS_MANDLOCK|MS_DIRSYNC|MS_NODIRATIME|MS_STRICTATIME, "acl,heartbeat=none,errors=remount-ro,coherency=full,preferred_slot=00000000000000000001,localflocks,"...) = 0
[pid 5821] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5821] chdir("./file1") = 0
[pid 5821] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5821] mkdir("./file0", 0777) = 0
[pid 5821] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[ 61.715070][ T5821] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
[pid 5821] mkdir("./file2", 0777) = 0
[pid 5821] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[ 61.812490][ T5821] overlayfs: upper fs does not support tmpfile.
[ 61.821553][ T5821] overlayfs: upper fs does not support RENAME_WHITEOUT.
[ 61.829326][ T5821]
[ 61.831653][ T5821] ======================================================
[ 61.838649][ T5821] WARNING: possible circular locking dependency detected
[ 61.845658][ T5821] 6.14.0-rc4-syzkaller-00169-g1e15510b71c9 #0 Not tainted
[ 61.852752][ T5821] ------------------------------------------------------
[ 61.859758][ T5821] syz-executor448/5821 is trying to acquire lock:
[ 61.866160][ T5821] ffff888077cd42c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x135/0x28d0
[ 61.879852][ T5821]
[ 61.879852][ T5821] but task is already holding lock:
[ 61.887199][ T5821] ffff888077cd6ab8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x633/0x1930
[ 61.896692][ T5821]
[ 61.896692][ T5821] which lock already depends on the new lock.
[ 61.896692][ T5821]
[ 61.907115][ T5821]
[ 61.907115][ T5821] the existing dependency chain (in reverse order) is:
[ 61.916116][ T5821]
[ 61.916116][ T5821] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}:
[ 61.923929][ T5821] lock_acquire+0x1ed/0x550
[ 61.928949][ T5821] down_write+0x99/0x220
[ 61.933714][ T5821] ocfs2_xattr_set_handle+0x539/0xa10
[ 61.939593][ T5821] ocfs2_init_security_set+0xbd/0xd0
[ 61.945384][ T5821] ocfs2_mknod+0x1ccf/0x2b30
[ 61.950496][ T5821] ocfs2_mkdir+0x1ab/0x470
[ 61.955439][ T5821] vfs_mkdir+0x2f9/0x4f0
[ 61.960205][ T5821] do_mkdirat+0x264/0x3a0
[ 61.965140][ T5821] __x64_sys_mkdir+0x6c/0x80
[ 61.970249][ T5821] do_syscall_64+0xf3/0x230
[ 61.975268][ T5821] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 61.981672][ T5821]
[ 61.981672][ T5821] -> #3 (jbd2_handle){.+.+}-{0:0}:
[ 61.988963][ T5821] lock_acquire+0x1ed/0x550
[ 61.993976][ T5821] start_this_handle+0x1eb4/0x2110
[ 61.999599][ T5821] jbd2__journal_start+0x2da/0x5d0
[ 62.005221][ T5821] jbd2_journal_start+0x29/0x40
[ 62.010598][ T5821] ocfs2_start_trans+0x3c9/0x700
[ 62.016065][ T5821] ocfs2_reserve_suballoc_bits+0x9f6/0x4e70
[ 62.022477][ T5821] ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0
[ 62.029314][ T5821] ocfs2_mknod+0x143a/0x2b30
[ 62.034416][ T5821] ocfs2_mkdir+0x1ab/0x470
[ 62.039342][ T5821] vfs_mkdir+0x2f9/0x4f0
[ 62.044094][ T5821] do_mkdirat+0x264/0x3a0
[ 62.048932][ T5821] __x64_sys_mkdir+0x6c/0x80
[ 62.054029][ T5821] do_syscall_64+0xf3/0x230
[ 62.059039][ T5821] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 62.065448][ T5821]
[ 62.065448][ T5821] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
[ 62.073954][ T5821] lock_acquire+0x1ed/0x550
[ 62.078973][ T5821] down_read+0xb1/0xa40
[ 62.083746][ T5821] ocfs2_start_trans+0x3be/0x700
[ 62.089190][ T5821] ocfs2_reserve_suballoc_bits+0x9f6/0x4e70
[ 62.095590][ T5821] ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0
[ 62.102426][ T5821] ocfs2_mknod+0x143a/0x2b30
[ 62.107524][ T5821] ocfs2_mkdir+0x1ab/0x470
[ 62.112449][ T5821] vfs_mkdir+0x2f9/0x4f0
[ 62.117198][ T5821] do_mkdirat+0x264/0x3a0
[ 62.122032][ T5821] __x64_sys_mkdir+0x6c/0x80
[ 62.127129][ T5821] do_syscall_64+0xf3/0x230
[ 62.132144][ T5821] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 62.138549][ T5821]
[ 62.138549][ T5821] -> #1 (sb_internal#2){.+.+}-{0:0}:
[ 62.146030][ T5821] lock_acquire+0x1ed/0x550
[ 62.151045][ T5821] ocfs2_start_trans+0x2b9/0x700
[ 62.156490][ T5821] ocfs2_mknod+0x150c/0x2b30
[ 62.161591][ T5821] ocfs2_mkdir+0x1ab/0x470
[ 62.166516][ T5821] vfs_mkdir+0x2f9/0x4f0
[ 62.171268][ T5821] do_mkdirat+0x264/0x3a0
[ 62.176103][ T5821] __x64_sys_mkdir+0x6c/0x80
[ 62.181200][ T5821] do_syscall_64+0xf3/0x230
[ 62.186212][ T5821] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 62.192611][ T5821]
[ 62.192611][ T5821] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}:
[ 62.203117][ T5821] validate_chain+0x18ef/0x5920
[ 62.208472][ T5821] __lock_acquire+0x1397/0x2100
[ 62.213827][ T5821] lock_acquire+0x1ed/0x550
[ 62.218835][ T5821] down_write+0x99/0x220
[ 62.223585][ T5821] ocfs2_reserve_local_alloc_bits+0x135/0x28d0
[ 62.230247][ T5821] ocfs2_reserve_clusters_with_limit+0x1b8/0xb60
[ 62.237077][ T5821] ocfs2_init_xattr_set_ctxt+0x433/0x8f0
[ 62.243215][ T5821] ocfs2_xattr_set+0xf4e/0x1930
[ 62.248570][ T5821] __vfs_setxattr+0x468/0x4a0
[ 62.253753][ T5821] __vfs_setxattr_noperm+0x12e/0x660
[ 62.259549][ T5821] vfs_setxattr+0x221/0x430
[ 62.264559][ T5821] ovl_get_workdir+0xda0/0x1930
[ 62.269917][ T5821] ovl_fill_super+0x12b3/0x3640
[ 62.275277][ T5821] get_tree_nodev+0xb7/0x140
[ 62.280373][ T5821] vfs_get_tree+0x90/0x2b0
[ 62.285296][ T5821] do_new_mount+0x2be/0xb40
[ 62.290307][ T5821] __se_sys_mount+0x2d6/0x3c0
[ 62.295664][ T5821] do_syscall_64+0xf3/0x230
[ 62.300677][ T5821] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 62.307083][ T5821]
[ 62.307083][ T5821] other info that might help us debug this:
[ 62.307083][ T5821]
[ 62.317290][ T5821] Chain exists of:
[ 62.317290][ T5821] &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> jbd2_handle --> &oi->ip_xattr_sem
[ 62.317290][ T5821]
[ 62.333012][ T5821] Possible unsafe locking scenario:
[ 62.333012][ T5821]
[ 62.340443][ T5821] CPU0 CPU1
[ 62.345788][ T5821] ---- ----
[ 62.351133][ T5821] lock(&oi->ip_xattr_sem);
[ 62.355718][ T5821] lock(jbd2_handle);
[ 62.362299][ T5821] lock(&oi->ip_xattr_sem);
[ 62.369481][ T5821] lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
[ 62.376756][ T5821]
[ 62.376756][ T5821] *** DEADLOCK ***
[ 62.376756][ T5821]
[ 62.384886][ T5821] 4 locks held by syz-executor448/5821:
[ 62.390410][ T5821] #0: ffff88805e39c0e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0
[ 62.400501][ T5821] #1: ffff88807e5e0420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90
[ 62.409635][ T5821] #2: ffff888077cd6d80 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x1e1/0x430
[ 62.420069][ T5821] #3: ffff888077cd6ab8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x633/0x1930
[ 62.429980][ T5821]
[ 62.429980][ T5821] stack backtrace:
[ 62.435862][ T5821] CPU: 0 UID: 0 PID: 5821 Comm: syz-executor448 Not tainted 6.14.0-rc4-syzkaller-00169-g1e15510b71c9 #0
[ 62.435876][ T5821] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
[ 62.435887][ T5821] Call Trace:
[ 62.435897][ T5821]
[ 62.435904][ T5821] dump_stack_lvl+0x241/0x360
[ 62.435919][ T5821] ? __pfx_dump_stack_lvl+0x10/0x10
[ 62.435930][ T5821] ? __pfx__printk+0x10/0x10
[ 62.435950][ T5821] print_circular_bug+0x13a/0x1b0
[ 62.435970][ T5821] check_noncircular+0x36a/0x4a0
[ 62.435984][ T5821] ? __pfx_check_noncircular+0x10/0x10
[ 62.435996][ T5821] ? lockdep_lock+0x123/0x2b0
[ 62.436015][ T5821] validate_chain+0x18ef/0x5920
[ 62.436033][ T5821] ? __pfx_validate_chain+0x10/0x10
[ 62.436046][ T5821] ? lock_acquire+0x264/0x550
[ 62.436063][ T5821] ? mark_lock+0x9a/0x360
[ 62.436082][ T5821] ? ocfs2_get_system_file_inode+0x1e3/0x840
[ 62.436100][ T5821] ? __pfx_lock_release+0x10/0x10
[ 62.436117][ T5821] ? mark_lock+0x9a/0x360
[ 62.436133][ T5821] __lock_acquire+0x1397/0x2100
[ 62.436153][ T5821] lock_acquire+0x1ed/0x550
[ 62.436168][ T5821] ? ocfs2_reserve_local_alloc_bits+0x135/0x28d0
[ 62.436189][ T5821] ? __pfx_lock_acquire+0x10/0x10
[ 62.436205][ T5821] ? __pfx___might_resched+0x10/0x10
[ 62.436221][ T5821] ? __pfx_ocfs2_get_system_file_inode+0x10/0x10
[ 62.436238][ T5821] ? __pfx_validate_chain+0x10/0x10
[ 62.436251][ T5821] down_write+0x99/0x220
[ 62.436268][ T5821] ? ocfs2_reserve_local_alloc_bits+0x135/0x28d0
[ 62.436284][ T5821] ? __pfx_down_write+0x10/0x10
[ 62.436303][ T5821] ocfs2_reserve_local_alloc_bits+0x135/0x28d0
[ 62.436321][ T5821] ? __kfence_alloc+0x3ca/0x400
[ 62.436338][ T5821] ? mark_lock+0x9a/0x360
[ 62.436353][ T5821] ? ocfs2_reserve_clusters_with_limit+0xe6/0xb60
[ 62.436367][ T5821] ? __lock_acquire+0x1397/0x2100
[ 62.436383][ T5821] ? __pfx_ocfs2_reserve_local_alloc_bits+0x10/0x10
[ 62.436406][ T5821] ? __pfx_lock_acquire+0x10/0x10
[ 62.436421][ T5821] ? ocfs2_alloc_should_use_local+0x155/0x320
[ 62.436437][ T5821] ? __pfx_lock_release+0x10/0x10
[ 62.436453][ T5821] ? do_raw_spin_lock+0x14f/0x370
[ 62.436468][ T5821] ? do_raw_spin_unlock+0x13c/0x8b0
[ 62.436483][ T5821] ? _raw_spin_unlock+0x28/0x50
[ 62.436496][ T5821] ? ocfs2_alloc_should_use_local+0x155/0x320
[ 62.436512][ T5821] ocfs2_reserve_clusters_with_limit+0x1b8/0xb60
[ 62.436527][ T5821] ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10
[ 62.436543][ T5821] ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10
[ 62.436561][ T5821] ? ocfs2_xattr_set+0xf00/0x1930
[ 62.436577][ T5821] ocfs2_init_xattr_set_ctxt+0x433/0x8f0
[ 62.436593][ T5821] ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10
[ 62.436608][ T5821] ? up_write+0x1a9/0x590
[ 62.436620][ T5821] ? __pfx_ocfs2_truncate_log_needs_flush+0x10/0x10
[ 62.436634][ T5821] ? __pfx_up_write+0x10/0x10
[ 62.436647][ T5821] ? __kmalloc_cache_noprof+0x243/0x390
[ 62.436658][ T5821] ? ocfs2_xattr_set+0x4d5/0x1930
[ 62.436672][ T5821] ocfs2_xattr_set+0xf4e/0x1930
[ 62.436691][ T5821] ? __pfx_ocfs2_xattr_set+0x10/0x10
[ 62.436705][ T5821] ? _prb_read_valid+0xa4c/0xad0
[ 62.436724][ T5821] ? mark_lock+0x9a/0x360
[ 62.436746][ T5821] ? smk_tskacc+0x300/0x370
[ 62.436762][ T5821] ? posix_xattr_acl+0xa9/0xd0
[ 62.436775][ T5821] ? evm_protect_xattr+0x4be/0xb40
[ 62.436794][ T5821] ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10
[ 62.436809][ T5821] __vfs_setxattr+0x468/0x4a0
[ 62.436830][ T5821] __vfs_setxattr_noperm+0x12e/0x660
[ 62.436849][ T5821] vfs_setxattr+0x221/0x430
[ 62.436868][ T5821] ? __pfx_vfs_setxattr+0x10/0x10
[ 62.436885][ T5821] ? _raw_spin_unlock+0x28/0x50
[ 62.436898][ T5821] ? dput+0x37/0x2b0
[ 62.436910][ T5821] ovl_get_workdir+0xda0/0x1930
[ 62.436929][ T5821] ? __pfx_ovl_get_workdir+0x10/0x10
[ 62.436946][ T5821] ? ovl_inuse_trylock+0xab/0xf0
[ 62.436965][ T5821] ? do_raw_spin_lock+0x14f/0x370
[ 62.436982][ T5821] ? _raw_spin_unlock+0x28/0x50
[ 62.436994][ T5821] ? ovl_inuse_trylock+0xab/0xf0
[ 62.437009][ T5821] ovl_fill_super+0x12b3/0x3640
[ 62.437032][ T5821] ? __pfx_ovl_fill_super+0x10/0x10
[ 62.437046][ T5821] ? __pfx_lockdep_init_map_type+0x10/0x10
[ 62.437063][ T5821] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 62.437084][ T5821] ? sget_fc+0x960/0xa50
[ 62.437099][ T5821] ? __pfx_set_anon_super_fc+0x10/0x10
[ 62.437113][ T5821] ? __pfx_ovl_fill_super+0x10/0x10
[ 62.437127][ T5821] get_tree_nodev+0xb7/0x140
[ 62.437142][ T5821] vfs_get_tree+0x90/0x2b0
[ 62.437158][ T5821] do_new_mount+0x2be/0xb40
[ 62.437178][ T5821] ? __pfx_do_new_mount+0x10/0x10
[ 62.437197][ T5821] __se_sys_mount+0x2d6/0x3c0
[ 62.437211][ T5821] ? __pfx___se_sys_mount+0x10/0x10
[ 62.437223][ T5821] ? exc_page_fault+0x590/0x8b0
[ 62.437238][ T5821] ? __x64_sys_mount+0x20/0xc0
[ 62.437250][ T5821] do_syscall_64+0xf3/0x230
[ 62.437265][ T5821] ? clear_bhb_loop+0x35/0x90
[ 62.437283][ T5821] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 62.437299][ T5821] RIP: 0033:0x7fab1c142599
[ 62.437314][ T5821] 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
[ 62.437324][ T5821] RSP: 002b:00007fff6c955b38 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 62.437337][ T5821] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fab1c142599
[ 62.437346][ T5821] RDX: 0000400000000000 RSI: 0000400000000380 RDI: 0000000000000000
[ 62.437354][ T5821] RBP: 0000000000000000 R08: 0000400000000140 R09: 00007fff6c955b70
[pid 5821] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5821] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5821] exit_group(0) = ?
[pid 5821] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5821, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=22 /* 0.22 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 62.437362][ T5821] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff6c955b70
[ 62.437370][ T5821] R13: 00007fff6c955df8 R14: 431bde82d7b634db R15: 00007fab1c18b03b
[ 62.437383][ T5821]
[ 62.984908][ T5821] overlayfs: upper fs missing required features.
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5825 attached
, child_tidptr=0x555570da9750) = 5825
[pid 5825] set_robust_list(0x555570da9760, 24) = 0
[pid 5825] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5825] setpgid(0, 0) = 0
[pid 5825] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5825] write(3, "1000", 4) = 4
[pid 5825] close(3) = 0
executing program
[pid 5825] write(1, "executing program\n", 18) = 18
[pid 5825] memfd_create("syzkaller", 0) = 3
[pid 5825] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5825] 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 5825] munmap(0x7fab13c00000, 138412032) = 0
[pid 5825] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5825] close(3) = 0
[pid 5825] mkdir("./file0", 0777) = 0
[pid 5825] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5825] mkdir("./file2", 0777) = 0
[pid 5825] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5825] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = 0
[pid 5825] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5825] exit_group(0) = ?
[pid 5825] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5825, 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 5826 attached
[pid 5826] set_robust_list(0x555570da9760, 24
[pid 5820] <... clone resumed>, child_tidptr=0x555570da9750) = 5826
[pid 5826] <... set_robust_list resumed>) = 0
[pid 5826] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5826] setpgid(0, 0) = 0
[pid 5826] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5826] write(3, "1000", 4) = 4
[pid 5826] close(3) = 0
executing program
[pid 5826] write(1, "executing program\n", 18) = 18
[pid 5826] memfd_create("syzkaller", 0) = 3
[pid 5826] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5826] 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 5826] munmap(0x7fab13c00000, 138412032) = 0
[pid 5826] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5826] close(3) = 0
[pid 5826] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5826] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5826] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5826] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5826] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5826] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5826] exit_group(0) = ?
[pid 5826] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5826, 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 5827 attached
, child_tidptr=0x555570da9750) = 5827
[pid 5827] set_robust_list(0x555570da9760, 24) = 0
[pid 5827] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5827] setpgid(0, 0) = 0
[pid 5827] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[ 63.474560][ T5826] overlay: filesystem on ./file0 not supported as upperdir
[pid 5827] write(3, "1000", 4) = 4
[pid 5827] close(3) = 0
[pid 5827] write(1, "executing program\n", 18executing program
) = 18
[pid 5827] memfd_create("syzkaller", 0) = 3
[pid 5827] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5827] 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 5827] munmap(0x7fab13c00000, 138412032) = 0
[pid 5827] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5827] close(3) = 0
[pid 5827] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5827] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5827] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5827] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5827] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5827] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5827] exit_group(0) = ?
[pid 5827] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5827, 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)
[ 63.763901][ T5827] 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 5828 attached
, child_tidptr=0x555570da9750) = 5828
[pid 5828] set_robust_list(0x555570da9760, 24) = 0
[pid 5828] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5828] setpgid(0, 0) = 0
[pid 5828] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5828] write(3, "1000", 4) = 4
[pid 5828] close(3) = 0
[pid 5828] write(1, "executing program\n", 18executing program
) = 18
[pid 5828] memfd_create("syzkaller", 0) = 3
[pid 5828] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5828] 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 5828] munmap(0x7fab13c00000, 138412032) = 0
[pid 5828] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5828] close(3) = 0
[pid 5828] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5828] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5828] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5828] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5828] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5828] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5828] exit_group(0) = ?
[pid 5828] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5828, si_uid=0, si_status=0, si_utime=2 /* 0.02 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)
[ 64.049580][ T5828] overlay: filesystem on ./file0 not supported as upperdir
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555570da9750) = 5829
./strace-static-x86_64: Process 5829 attached
[pid 5829] set_robust_list(0x555570da9760, 24) = 0
[pid 5829] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5829] setpgid(0, 0) = 0
[pid 5829] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5829] write(3, "1000", 4) = 4
[pid 5829] close(3) = 0
executing program
[pid 5829] write(1, "executing program\n", 18) = 18
[pid 5829] memfd_create("syzkaller", 0) = 3
[pid 5829] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5829] 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 5829] munmap(0x7fab13c00000, 138412032) = 0
[pid 5829] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5829] close(3) = 0
[pid 5829] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5829] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5829] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5829] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5829] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5829] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5829] exit_group(0) = ?
[pid 5829] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5829, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[ 64.330888][ T5829] 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 5830 attached
, child_tidptr=0x555570da9750) = 5830
[pid 5830] set_robust_list(0x555570da9760, 24) = 0
[pid 5830] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5830] setpgid(0, 0) = 0
[pid 5830] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5830] write(3, "1000", 4) = 4
[pid 5830] close(3) = 0
[pid 5830] write(1, "executing program\n", 18executing program
) = 18
[pid 5830] memfd_create("syzkaller", 0) = 3
[pid 5830] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5830] 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 5830] munmap(0x7fab13c00000, 138412032) = 0
[pid 5830] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5830] close(3) = 0
[pid 5830] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5830] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5830] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5830] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5830] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5830] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5830] exit_group(0) = ?
[pid 5830] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5830, 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)
[ 64.644340][ T5830] 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 5831 attached
, child_tidptr=0x555570da9750) = 5831
[pid 5831] set_robust_list(0x555570da9760, 24) = 0
[pid 5831] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5831] setpgid(0, 0) = 0
[pid 5831] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5831] write(3, "1000", 4) = 4
[pid 5831] close(3) = 0
executing program
[pid 5831] write(1, "executing program\n", 18) = 18
[pid 5831] memfd_create("syzkaller", 0) = 3
[pid 5831] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5831] 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 5831] munmap(0x7fab13c00000, 138412032) = 0
[pid 5831] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5831] close(3) = 0
[pid 5831] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5831] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5831] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5831] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5831] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5831] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5831] exit_group(0) = ?
[pid 5831] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5831, 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)
[ 64.989316][ T5831] 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 5832 attached
, child_tidptr=0x555570da9750) = 5832
[pid 5832] set_robust_list(0x555570da9760, 24) = 0
[pid 5832] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5832] setpgid(0, 0) = 0
[pid 5832] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5832] write(3, "1000", 4) = 4
[pid 5832] close(3) = 0
executing program
[pid 5832] write(1, "executing program\n", 18) = 18
[pid 5832] memfd_create("syzkaller", 0) = 3
[pid 5832] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5832] 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 5832] munmap(0x7fab13c00000, 138412032) = 0
[pid 5832] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5832] close(3) = 0
[pid 5832] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5832] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5832] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5832] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5832] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5832] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5832] exit_group(0) = ?
[pid 5832] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5832, 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)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5833 attached
, child_tidptr=0x555570da9750) = 5833
[ 65.304560][ T5832] overlay: filesystem on ./file0 not supported as upperdir
[pid 5833] set_robust_list(0x555570da9760, 24) = 0
[pid 5833] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5833] setpgid(0, 0) = 0
[pid 5833] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5833] write(3, "1000", 4) = 4
[pid 5833] close(3) = 0
executing program
[pid 5833] write(1, "executing program\n", 18) = 18
[pid 5833] memfd_create("syzkaller", 0) = 3
[pid 5833] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5833] 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 5833] munmap(0x7fab13c00000, 138412032) = 0
[pid 5833] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5833] close(3) = 0
[pid 5833] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5833] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5833] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5833] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5833] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5833] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5833] exit_group(0) = ?
[pid 5833] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5833, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=7 /* 0.07 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[ 65.658411][ T5833] 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, child_tidptr=0x555570da9750) = 5834
./strace-static-x86_64: Process 5834 attached
[pid 5834] set_robust_list(0x555570da9760, 24) = 0
[pid 5834] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5834] setpgid(0, 0) = 0
[pid 5834] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5834] write(3, "1000", 4) = 4
[pid 5834] close(3) = 0
executing program
[pid 5834] write(1, "executing program\n", 18) = 18
[pid 5834] memfd_create("syzkaller", 0) = 3
[pid 5834] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5834] 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 5834] munmap(0x7fab13c00000, 138412032) = 0
[pid 5834] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5834] close(3) = 0
[pid 5834] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5834] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5834] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5834] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5834] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5834] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5834] exit_group(0) = ?
[pid 5834] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5834, 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)
[ 66.025739][ T5834] 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 5835 attached
, child_tidptr=0x555570da9750) = 5835
[pid 5835] set_robust_list(0x555570da9760, 24) = 0
[pid 5835] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5835] setpgid(0, 0) = 0
[pid 5835] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5835] write(3, "1000", 4) = 4
[pid 5835] close(3) = 0
[pid 5835] write(1, "executing program\n", 18executing program
) = 18
[pid 5835] memfd_create("syzkaller", 0) = 3
[pid 5835] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5835] 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 5835] munmap(0x7fab13c00000, 138412032) = 0
[pid 5835] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5835] close(3) = 0
[pid 5835] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5835] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5835] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5835] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5835] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5835] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5835] exit_group(0) = ?
[pid 5835] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5835, si_uid=0, si_status=0, si_utime=1 /* 0.01 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 5836 attached
, child_tidptr=0x555570da9750) = 5836
[ 66.339253][ T5835] overlay: filesystem on ./file0 not supported as upperdir
[pid 5836] set_robust_list(0x555570da9760, 24) = 0
[pid 5836] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5836] setpgid(0, 0) = 0
[pid 5836] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5836] write(3, "1000", 4) = 4
[pid 5836] close(3) = 0
executing program
[pid 5836] write(1, "executing program\n", 18) = 18
[pid 5836] memfd_create("syzkaller", 0) = 3
[pid 5836] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5836] 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 5836] munmap(0x7fab13c00000, 138412032) = 0
[pid 5836] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5836] close(3) = 0
[pid 5836] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5836] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5836] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5836] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5836] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5836] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5836] exit_group(0) = ?
[pid 5836] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5836, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[ 66.647294][ T5836] 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, child_tidptr=0x555570da9750) = 5837
./strace-static-x86_64: Process 5837 attached
[pid 5837] set_robust_list(0x555570da9760, 24) = 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) = 0x7fab13c00000
[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(0x7fab13c00000, 138412032) = 0
[pid 5837] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5837] close(3) = 0
[pid 5837] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5837] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5837] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5837] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5837] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5837] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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=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)
[ 66.977921][ T5837] 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 5838 attached
, child_tidptr=0x555570da9750) = 5838
[pid 5838] set_robust_list(0x555570da9760, 24) = 0
[pid 5838] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5838] setpgid(0, 0) = 0
[pid 5838] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5838] write(3, "1000", 4) = 4
[pid 5838] close(3) = 0
executing program
[pid 5838] write(1, "executing program\n", 18) = 18
[pid 5838] memfd_create("syzkaller", 0) = 3
[pid 5838] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5838] 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 5838] munmap(0x7fab13c00000, 138412032) = 0
[pid 5838] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5838] close(3) = 0
[pid 5838] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5838] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5838] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5838] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5838] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5838] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5838] exit_group(0) = ?
[pid 5838] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5838, 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 5839 attached
, child_tidptr=0x555570da9750) = 5839
[pid 5839] set_robust_list(0x555570da9760, 24) = 0
[ 67.267337][ T5838] overlay: filesystem on ./file0 not supported as upperdir
[pid 5839] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5839] setpgid(0, 0) = 0
[pid 5839] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5839] write(3, "1000", 4) = 4
[pid 5839] close(3) = 0
executing program
[pid 5839] write(1, "executing program\n", 18) = 18
[pid 5839] memfd_create("syzkaller", 0) = 3
[pid 5839] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5839] 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 5839] munmap(0x7fab13c00000, 138412032) = 0
[pid 5839] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5839] close(3) = 0
[pid 5839] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5839] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5839] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5839] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5839] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5839] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5839] exit_group(0) = ?
[pid 5839] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5839, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=8 /* 0.08 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[ 67.581296][ T5839] 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 5840 attached
, child_tidptr=0x555570da9750) = 5840
[pid 5840] set_robust_list(0x555570da9760, 24) = 0
[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
executing program
[pid 5840] write(1, "executing program\n", 18) = 18
[pid 5840] memfd_create("syzkaller", 0) = 3
[pid 5840] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[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(0x7fab13c00000, 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) = -1 EEXIST (File exists)
[pid 5840] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5840] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5840] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5840] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5840] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[ 67.933872][ T5840] 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 5841 attached
, child_tidptr=0x555570da9750) = 5841
[pid 5841] set_robust_list(0x555570da9760, 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
[pid 5841] write(1, "executing program\n", 18executing program
) = 18
[pid 5841] memfd_create("syzkaller", 0) = 3
[pid 5841] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[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(0x7fab13c00000, 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("./file2", 0777) = -1 EEXIST (File exists)
[pid 5841] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5841] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5841] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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=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)
[ 68.298705][ T5841] 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 5842 attached
, child_tidptr=0x555570da9750) = 5842
[pid 5842] set_robust_list(0x555570da9760, 24) = 0
[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
[pid 5842] memfd_create("syzkaller", 0) = 3
[pid 5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[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(0x7fab13c00000, 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("./file2", 0777) = -1 EEXIST (File exists)
[pid 5842] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5842] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5842] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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=2 /* 0.02 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)
[ 68.630780][ T5842] 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 5843 attached
, child_tidptr=0x555570da9750) = 5843
[pid 5843] set_robust_list(0x555570da9760, 24) = 0
[pid 5843] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5843] setpgid(0, 0) = 0
[pid 5843] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5843] write(3, "1000", 4) = 4
[pid 5843] close(3) = 0
executing program
[pid 5843] write(1, "executing program\n", 18) = 18
[pid 5843] memfd_create("syzkaller", 0) = 3
[pid 5843] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5843] 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 5843] munmap(0x7fab13c00000, 138412032) = 0
[pid 5843] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5843] close(3) = 0
[pid 5843] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5843] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5843] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5843] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5843] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5843] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5843] exit_group(0) = ?
[pid 5843] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5843, si_uid=0, si_status=0, si_utime=2 /* 0.02 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 5844 attached
, child_tidptr=0x555570da9750) = 5844
[ 68.913666][ T5843] overlay: filesystem on ./file0 not supported as upperdir
[pid 5844] set_robust_list(0x555570da9760, 24) = 0
[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) = 0x7fab13c00000
[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(0x7fab13c00000, 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("./file2", 0777) = -1 EEXIST (File exists)
[pid 5844] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5844] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5844] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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=8 /* 0.08 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 69.248188][ T5844] 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 5845 attached
, child_tidptr=0x555570da9750) = 5845
[pid 5845] set_robust_list(0x555570da9760, 24) = 0
[pid 5845] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5845] setpgid(0, 0) = 0
[pid 5845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5845] write(3, "1000", 4) = 4
[pid 5845] close(3) = 0
executing program
[pid 5845] write(1, "executing program\n", 18) = 18
[pid 5845] memfd_create("syzkaller", 0) = 3
[pid 5845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5845] 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 5845] munmap(0x7fab13c00000, 138412032) = 0
[pid 5845] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5845] close(3) = 0
[pid 5845] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5845] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5845] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5845] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5845] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5845] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5845] exit_group(0) = ?
[pid 5845] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5845, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=7 /* 0.07 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[ 69.520209][ T5845] 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=0x555570da9750) = 5846
[pid 5846] set_robust_list(0x555570da9760, 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
executing program
[pid 5846] write(1, "executing program\n", 18) = 18
[pid 5846] memfd_create("syzkaller", 0) = 3
[pid 5846] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[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(0x7fab13c00000, 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("./file2", 0777) = -1 EEXIST (File exists)
[pid 5846] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5846] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5846] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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=7 /* 0.07 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 69.857191][ T5846] 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 5847 attached
, child_tidptr=0x555570da9750) = 5847
[pid 5847] set_robust_list(0x555570da9760, 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) = 0x7fab13c00000
[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(0x7fab13c00000, 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("./file2", 0777) = -1 EEXIST (File exists)
[pid 5847] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5847] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5847] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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 */} ---
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 5848 attached
, child_tidptr=0x555570da9750) = 5848
[ 70.150056][ T5847] overlay: filesystem on ./file0 not supported as upperdir
[pid 5848] set_robust_list(0x555570da9760, 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) = 0x7fab13c00000
[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(0x7fab13c00000, 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("./file2", 0777) = -1 EEXIST (File exists)
[pid 5848] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5848] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5848] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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=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)
[ 70.445354][ T5848] 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 5849 attached
, child_tidptr=0x555570da9750) = 5849
[pid 5849] set_robust_list(0x555570da9760, 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
executing program
[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) = 0x7fab13c00000
[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(0x7fab13c00000, 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("./file2", 0777) = -1 EEXIST (File exists)
[pid 5849] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5849] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5849] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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=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 5850 attached
, child_tidptr=0x555570da9750) = 5850
[ 70.789184][ T5849] overlay: filesystem on ./file0 not supported as upperdir
[pid 5850] set_robust_list(0x555570da9760, 24) = 0
[pid 5850] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[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) = 0x7fab13c00000
[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(0x7fab13c00000, 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("./file2", 0777) = -1 EEXIST (File exists)
[pid 5850] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5850] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5850] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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=4 /* 0.04 s */, si_stime=6 /* 0.06 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 71.080320][ T5850] 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 5851 attached
, child_tidptr=0x555570da9750) = 5851
[pid 5851] set_robust_list(0x555570da9760, 24) = 0
[pid 5851] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5851] setpgid(0, 0) = 0
[pid 5851] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5851] write(3, "1000", 4) = 4
[pid 5851] close(3) = 0
executing program
[pid 5851] write(1, "executing program\n", 18) = 18
[pid 5851] memfd_create("syzkaller", 0) = 3
[pid 5851] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[pid 5851] 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 5851] munmap(0x7fab13c00000, 138412032) = 0
[pid 5851] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5851] close(3) = 0
[pid 5851] mkdir("./file0", 0777) = -1 EEXIST (File exists)
[pid 5851] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5851] mkdir("./file2", 0777) = -1 EEXIST (File exists)
[pid 5851] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5851] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5851] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[pid 5851] exit_group(0) = ?
[pid 5851] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5851, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} ---
[ 71.403733][ T5851] 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 5852 attached
, child_tidptr=0x555570da9750) = 5852
[pid 5852] set_robust_list(0x555570da9760, 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
[pid 5852] write(1, "executing program\n", 18executing program
) = 18
[pid 5852] memfd_create("syzkaller", 0) = 3
[pid 5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fab13c00000
[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(0x7fab13c00000, 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("./file2", 0777) = -1 EEXIST (File exists)
[pid 5852] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5852] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid 5852] openat(AT_FDCWD, NULL, O_RDONLY) = -1 EFAULT (Bad address)
[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=6 /* 0.06 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
[ 71.757049][ T5852] overlay: filesystem on ./file0 not supported as upperdir
, child_tidptr=0x555570da9750) = 5853
[pid 5853] set_robust_list(0x555570da9760, 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