./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1235915365
<...>
Warning: Permanently added '10.128.1.240' (ED25519) to the list of known hosts.
execve("./syz-executor1235915365", ["./syz-executor1235915365"], 0x7ffd49e6da60 /* 10 vars */) = 0
brk(NULL) = 0x5555642e7000
brk(0x5555642e7e00) = 0x5555642e7e00
arch_prctl(ARCH_SET_FS, 0x5555642e7480) = 0
set_tid_address(0x5555642e7750) = 5840
set_robust_list(0x5555642e7760, 24) = 0
rseq(0x5555642e7da0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor1235915365", 4096) = 28
getrandom("\x42\x53\xfa\x84\x8c\x35\x01\x08", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x5555642e7e00
brk(0x555564308e00) = 0x555564308e00
brk(0x555564309000) = 0x555564309000
mprotect(0x7fdbd3f06000, 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=0x7fdbd3e58a60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fdbd3e614d0}, NULL, 8) = 0
rt_sigaction(SIGBUS, {sa_handler=0x7fdbd3e58a60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fdbd3e614d0}, 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 5841 attached
, child_tidptr=0x5555642e7750) = 5841
[pid 5841] set_robust_list(0x5555642e7760, 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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5841] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5841] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5841] close(3) = 0
[pid 5841] close(4) = 0
[pid 5841] mkdir("./file1", 0777) = 0
[ 90.797572][ T5841] loop0: detected capacity change from 0 to 32768
[ 90.825438][ T5841] =======================================================
[ 90.825438][ T5841] WARNING: The mand mount option has been deprecated and
[ 90.825438][ T5841] and is ignored by this kernel. Remove the mand
[ 90.825438][ T5841] option from the mount to silence this warning.
[ 90.825438][ T5841] =======================================================
[pid 5841] 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 5841] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5841] chdir("./file1") = 0
[pid 5841] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 90.892865][ T5841] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
[pid 5841] mkdirat(AT_FDCWD, "./file0", 000) = 0
[pid 5841] mkdir("./bus", 0777) = 0
[pid 5841] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[ 90.970895][ T5841] overlayfs: upper fs does not support tmpfile.
[ 90.979949][ T5841] overlayfs: upper fs does not support RENAME_WHITEOUT.
[ 90.987398][ T5841]
[ 90.989731][ T5841] ======================================================
[ 90.996742][ T5841] WARNING: possible circular locking dependency detected
[ 91.003757][ T5841] 6.16.0-rc7-syzkaller #0 Not tainted
[ 91.009119][ T5841] ------------------------------------------------------
[ 91.016127][ T5841] syz-executor123/5841 is trying to acquire lock:
[ 91.022528][ T5841] ffff88807ddd2640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 91.036039][ T5841]
[ 91.036039][ T5841] but task is already holding lock:
[ 91.043393][ T5841] ffff88807ddd5c78 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[ 91.052875][ T5841]
[ 91.052875][ T5841] which lock already depends on the new lock.
[ 91.052875][ T5841]
[ 91.063266][ T5841]
[ 91.063266][ T5841] the existing dependency chain (in reverse order) is:
[ 91.072273][ T5841]
[ 91.072273][ T5841] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}:
[ 91.080091][ T5841] lock_acquire+0x120/0x360
[ 91.085118][ T5841] down_write+0x96/0x1f0
[ 91.089899][ T5841] ocfs2_xattr_set_handle+0x3b0/0x7a0
[ 91.095807][ T5841] ocfs2_init_security_set+0xbd/0xe0
[ 91.101623][ T5841] ocfs2_mknod+0x137f/0x2050
[ 91.106741][ T5841] ocfs2_mkdir+0x191/0x440
[ 91.111685][ T5841] vfs_mkdir+0x306/0x510
[ 91.116459][ T5841] do_mkdirat+0x247/0x590
[ 91.121318][ T5841] __x64_sys_mkdirat+0x87/0xa0
[ 91.126621][ T5841] do_syscall_64+0xfa/0x3b0
[ 91.131649][ T5841] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 91.138067][ T5841]
[ 91.138067][ T5841] -> #3 (jbd2_handle){.+.+}-{0:0}:
[ 91.145375][ T5841] lock_acquire+0x120/0x360
[ 91.150401][ T5841] start_this_handle+0x1fa7/0x21c0
[ 91.156049][ T5841] jbd2__journal_start+0x2c1/0x5b0
[ 91.161688][ T5841] jbd2_journal_start+0x2a/0x40
[ 91.167067][ T5841] ocfs2_start_trans+0x376/0x6d0
[ 91.172531][ T5841] ocfs2_reserve_suballoc_bits+0x711/0x4640
[ 91.178967][ T5841] ocfs2_reserve_new_metadata_blocks+0x403/0x940
[ 91.185840][ T5841] ocfs2_mknod+0xe08/0x2050
[ 91.190902][ T5841] ocfs2_mkdir+0x191/0x440
[ 91.195864][ T5841] vfs_mkdir+0x306/0x510
[ 91.200645][ T5841] do_mkdirat+0x247/0x590
[ 91.205509][ T5841] __x64_sys_mkdirat+0x87/0xa0
[ 91.210803][ T5841] do_syscall_64+0xfa/0x3b0
[ 91.215834][ T5841] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 91.222251][ T5841]
[ 91.222251][ T5841] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
[ 91.230781][ T5841] lock_acquire+0x120/0x360
[ 91.235807][ T5841] down_read+0x46/0x2e0
[ 91.240489][ T5841] ocfs2_start_trans+0x36a/0x6d0
[ 91.245955][ T5841] ocfs2_reserve_suballoc_bits+0x711/0x4640
[ 91.252373][ T5841] ocfs2_reserve_new_metadata_blocks+0x403/0x940
[ 91.259224][ T5841] ocfs2_mknod+0xe08/0x2050
[ 91.264256][ T5841] ocfs2_mkdir+0x191/0x440
[ 91.269197][ T5841] vfs_mkdir+0x306/0x510
[ 91.273968][ T5841] do_mkdirat+0x247/0x590
[ 91.278826][ T5841] __x64_sys_mkdirat+0x87/0xa0
[ 91.284123][ T5841] do_syscall_64+0xfa/0x3b0
[ 91.289156][ T5841] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 91.295574][ T5841]
[ 91.295574][ T5841] -> #1 (sb_internal#2){.+.+}-{0:0}:
[ 91.303063][ T5841] lock_acquire+0x120/0x360
[ 91.308090][ T5841] ocfs2_start_trans+0x26b/0x6d0
[ 91.313556][ T5841] ocfs2_mknod+0xe93/0x2050
[ 91.318582][ T5841] ocfs2_mkdir+0x191/0x440
[ 91.323520][ T5841] vfs_mkdir+0x306/0x510
[ 91.328293][ T5841] do_mkdirat+0x247/0x590
[ 91.333159][ T5841] __x64_sys_mkdirat+0x87/0xa0
[ 91.338458][ T5841] do_syscall_64+0xfa/0x3b0
[ 91.343488][ T5841] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 91.349907][ T5841]
[ 91.349907][ T5841] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}:
[ 91.360437][ T5841] validate_chain+0xb9b/0x2140
[ 91.365731][ T5841] __lock_acquire+0xab9/0xd20
[ 91.370926][ T5841] lock_acquire+0x120/0x360
[ 91.375952][ T5841] down_write+0x96/0x1f0
[ 91.380720][ T5841] ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 91.387399][ T5841] ocfs2_reserve_clusters_with_limit+0x1be/0xba0
[ 91.394252][ T5841] ocfs2_init_xattr_set_ctxt+0x376/0x700
[ 91.400417][ T5841] ocfs2_xattr_set+0xb70/0x11f0
[ 91.405795][ T5841] __vfs_setxattr+0x43c/0x480
[ 91.410994][ T5841] __vfs_setxattr_noperm+0x12d/0x660
[ 91.416802][ T5841] vfs_setxattr+0x16b/0x2f0
[ 91.421847][ T5841] ovl_get_workdir+0xbb7/0x1730
[ 91.427257][ T5841] ovl_fill_super+0x1386/0x35d0
[ 91.432665][ T5841] get_tree_nodev+0xbb/0x150
[ 91.437798][ T5841] vfs_get_tree+0x92/0x2b0
[ 91.442738][ T5841] do_new_mount+0x24a/0xa40
[ 91.447765][ T5841] __se_sys_mount+0x317/0x410
[ 91.452973][ T5841] do_syscall_64+0xfa/0x3b0
[ 91.458014][ T5841] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 91.464437][ T5841]
[ 91.464437][ T5841] other info that might help us debug this:
[ 91.464437][ T5841]
[ 91.474664][ T5841] Chain exists of:
[ 91.474664][ T5841] &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> jbd2_handle --> &oi->ip_xattr_sem
[ 91.474664][ T5841]
[ 91.490414][ T5841] Possible unsafe locking scenario:
[ 91.490414][ T5841]
[ 91.497862][ T5841] CPU0 CPU1
[ 91.503225][ T5841] ---- ----
[ 91.508596][ T5841] lock(&oi->ip_xattr_sem);
[ 91.513197][ T5841] lock(jbd2_handle);
[ 91.519791][ T5841] lock(&oi->ip_xattr_sem);
[ 91.526905][ T5841] lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
[ 91.534200][ T5841]
[ 91.534200][ T5841] *** DEADLOCK ***
[ 91.534200][ T5841]
[ 91.542344][ T5841] 4 locks held by syz-executor123/5841:
[ 91.547890][ T5841] #0: ffff88807b9ca0e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970
[ 91.558023][ T5841] #1: ffff88807b8a6428 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
[ 91.567187][ T5841] #2: ffff88807ddd5f40 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0
[ 91.577651][ T5841] #3: ffff88807ddd5c78 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[ 91.587585][ T5841]
[ 91.587585][ T5841] stack backtrace:
[ 91.593473][ T5841] CPU: 1 UID: 0 PID: 5841 Comm: syz-executor123 Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(full)
[ 91.593492][ T5841] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[ 91.593501][ T5841] Call Trace:
[ 91.593510][ T5841]
[ 91.593517][ T5841] dump_stack_lvl+0x189/0x250
[ 91.593537][ T5841] ? __pfx_dump_stack_lvl+0x10/0x10
[ 91.593553][ T5841] ? __pfx__printk+0x10/0x10
[ 91.593572][ T5841] ? print_lock_name+0xde/0x100
[ 91.593590][ T5841] print_circular_bug+0x2ee/0x310
[ 91.593610][ T5841] check_noncircular+0x134/0x160
[ 91.593629][ T5841] validate_chain+0xb9b/0x2140
[ 91.593647][ T5841] ? __mutex_unlock_slowpath+0x1cd/0x700
[ 91.593665][ T5841] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 91.593684][ T5841] __lock_acquire+0xab9/0xd20
[ 91.593700][ T5841] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 91.593715][ T5841] lock_acquire+0x120/0x360
[ 91.593728][ T5841] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 91.593744][ T5841] ? is_bpf_text_address+0x26/0x2b0
[ 91.593760][ T5841] ? kernel_text_address+0xa5/0xe0
[ 91.593783][ T5841] down_write+0x96/0x1f0
[ 91.593800][ T5841] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 91.593816][ T5841] ? __pfx_down_write+0x10/0x10
[ 91.593836][ T5841] ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 91.593854][ T5841] ? check_noncircular+0xe0/0x160
[ 91.593872][ T5841] ? lockdep_unlock+0x89/0x120
[ 91.593893][ T5841] ? validate_chain+0x897/0x2140
[ 91.593910][ T5841] ? __pfx_ocfs2_reserve_local_alloc_bits+0x10/0x10
[ 91.593925][ T5841] ? get_tree_nodev+0xbb/0x150
[ 91.593952][ T5841] ? __lock_acquire+0xab9/0xd20
[ 91.593971][ T5841] ? do_raw_spin_unlock+0x122/0x240
[ 91.593998][ T5841] ? _raw_spin_unlock+0x28/0x50
[ 91.594019][ T5841] ? ocfs2_alloc_should_use_local+0x152/0x310
[ 91.594034][ T5841] ? ocfs2_reserve_clusters_with_limit+0x16b/0xba0
[ 91.594054][ T5841] ocfs2_reserve_clusters_with_limit+0x1be/0xba0
[ 91.594075][ T5841] ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10
[ 91.594097][ T5841] ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10
[ 91.594114][ T5841] ? ocfs2_xattr_set+0xadd/0x11f0
[ 91.594136][ T5841] ocfs2_init_xattr_set_ctxt+0x376/0x700
[ 91.594159][ T5841] ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10
[ 91.594182][ T5841] ? ocfs2_xattr_set+0xb36/0x11f0
[ 91.594203][ T5841] ? up_write+0x1c4/0x420
[ 91.594220][ T5841] ? ocfs2_xattr_set+0x334/0x11f0
[ 91.594241][ T5841] ocfs2_xattr_set+0xb70/0x11f0
[ 91.594268][ T5841] ? __pfx_ocfs2_xattr_set+0x10/0x10
[ 91.594289][ T5841] ? up+0xde/0x150
[ 91.594307][ T5841] ? smack_log+0xef/0x3f0
[ 91.594328][ T5841] ? __pfx___console_unlock+0x10/0x10
[ 91.594346][ T5841] ? smk_access+0x14c/0x4e0
[ 91.594368][ T5841] ? smk_tskacc+0x2fc/0x370
[ 91.594390][ T5841] ? posix_xattr_acl+0x93/0xc0
[ 91.594409][ T5841] ? evm_protect_xattr+0x4d4/0xa90
[ 91.594428][ T5841] ? __pfx_evm_protect_xattr+0x10/0x10
[ 91.594445][ T5841] ? safesetid_security_capable+0xa9/0x1a0
[ 91.594461][ T5841] ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10
[ 91.594483][ T5841] __vfs_setxattr+0x43c/0x480
[ 91.594502][ T5841] __vfs_setxattr_noperm+0x12d/0x660
[ 91.594523][ T5841] vfs_setxattr+0x16b/0x2f0
[ 91.594547][ T5841] ? __pfx_vfs_setxattr+0x10/0x10
[ 91.594564][ T5841] ? up_write+0x1c4/0x420
[ 91.594582][ T5841] ovl_get_workdir+0xbb7/0x1730
[ 91.594604][ T5841] ? __pfx_ovl_get_workdir+0x10/0x10
[ 91.594632][ T5841] ? do_raw_spin_unlock+0x122/0x240
[ 91.594652][ T5841] ? _raw_spin_unlock+0x28/0x50
[ 91.594673][ T5841] ? ovl_inuse_trylock+0xae/0xf0
[ 91.594692][ T5841] ovl_fill_super+0x1386/0x35d0
[ 91.594714][ T5841] ? rcu_is_watching+0x15/0xb0
[ 91.594733][ T5841] ? shrinker_register+0x124/0x230
[ 91.594754][ T5841] ? __pfx_ovl_fill_super+0x10/0x10
[ 91.594773][ T5841] ? __pfx___mutex_lock+0x10/0x10
[ 91.594788][ T5841] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 91.594807][ T5841] ? __raw_spin_lock_init+0x45/0x100
[ 91.594830][ T5841] ? sget_fc+0x962/0xa40
[ 91.594851][ T5841] ? __pfx_set_anon_super_fc+0x10/0x10
[ 91.594873][ T5841] ? __pfx_ovl_fill_super+0x10/0x10
[ 91.594891][ T5841] get_tree_nodev+0xbb/0x150
[ 91.594914][ T5841] vfs_get_tree+0x92/0x2b0
[ 91.594929][ T5841] do_new_mount+0x24a/0xa40
[ 91.594947][ T5841] __se_sys_mount+0x317/0x410
[ 91.594965][ T5841] ? __pfx___se_sys_mount+0x10/0x10
[ 91.594992][ T5841] ? __x64_sys_mount+0x20/0xc0
[ 91.595009][ T5841] do_syscall_64+0xfa/0x3b0
[ 91.595026][ T5841] ? lockdep_hardirqs_on+0x9c/0x150
[ 91.595040][ T5841] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 91.595055][ T5841] ? clear_bhb_loop+0x60/0xb0
[ 91.595071][ T5841] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 91.595086][ T5841] RIP: 0033:0x7fdbd3e8e559
[ 91.595101][ T5841] 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
[ 91.595114][ T5841] RSP: 002b:00007ffcd1cfa348 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 91.595130][ T5841] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdbd3e8e559
[ 91.595141][ T5841] RDX: 0000200000000b80 RSI: 0000200000000100 RDI: 0000000000000000
[ 91.595151][ T5841] RBP: 0000000000000000 R08: 0000200000000200 R09: 00007ffcd1cfa380
[ 91.595161][ T5841] R10: 0000000000000008 R11: 0000000000000246 R12: 00007ffcd1cfa380
[ 91.595171][ T5841] R13: 00007ffcd1cfa608 R14: 431bde82d7b634db R15: 00007fdbd3ed703b
[ 91.595187][ T5841]
[ 92.114975][ T977] cfg80211: failed to load regulatory.db
[pid 5841] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5841] exit_group(0) = ?
[pid 5841] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5841, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=22 /* 0.22 s */} ---
[ 92.117340][ T5841] overlayfs: upper fs missing required features.
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5849 attached
, child_tidptr=0x5555642e7750) = 5849
[pid 5849] set_robust_list(0x5555642e7760, 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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5849] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5849] close(3) = 0
[pid 5849] mkdirat(AT_FDCWD, "./file0", 000) = 0
[pid 5849] mkdir("./bus", 0777) = 0
[pid 5849] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5849] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = 0
[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=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 5850 attached
[pid 5850] set_robust_list(0x5555642e7760, 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
[pid 5840] <... clone resumed>, child_tidptr=0x5555642e7750) = 5850
[pid 5850] <... openat resumed>) = 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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5850] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5850] close(3) = 0
[pid 5850] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5850] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5850] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5850] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5850] exit_group(0) = ?
[pid 5850] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5850, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5852 attached
, child_tidptr=0x5555642e7750) = 5852
[pid 5852] set_robust_list(0x5555642e7760, 24) = 0
[pid 5852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 92.503989][ T5850] overlay: filesystem on ./file0 not supported as upperdir
[pid 5852] setpgid(0, 0) = 0
[pid 5852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5852] write(3, "1000", 4) = 4
[pid 5852] close(3) = 0
executing program
[pid 5852] write(1, "executing program\n", 18) = 18
[pid 5852] memfd_create("syzkaller", 0) = 3
[pid 5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5852] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5852] close(3) = 0
[pid 5852] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5852] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5852] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5852] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5852] exit_group(0) = ?
[pid 5852] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5852, si_uid=0, si_status=0, si_utime=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 5853 attached
[pid 5853] set_robust_list(0x5555642e7760, 24
[pid 5840] <... clone resumed>, child_tidptr=0x5555642e7750) = 5853
[pid 5853] <... set_robust_list resumed>) = 0
[ 92.741697][ T5852] overlay: filesystem on ./file0 not supported as upperdir
[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
executing program
[pid 5853] write(1, "executing program\n", 18) = 18
[pid 5853] memfd_create("syzkaller", 0) = 3
[pid 5853] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5853] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5853] close(3) = 0
[pid 5853] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5853] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5853] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5853] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[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=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 5854 attached
, child_tidptr=0x5555642e7750) = 5854
[pid 5854] set_robust_list(0x5555642e7760, 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
executing program
[pid 5854] write(1, "executing program\n", 18) = 18
[pid 5854] memfd_create("syzkaller", 0) = 3
[pid 5854] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[ 92.997357][ T5853] overlay: filesystem on ./file0 not supported as upperdir
[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(0x7fdbcba00000, 138412032) = 0
[pid 5854] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5854] close(3) = 0
[pid 5854] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5854] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5854] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5854] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=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)
[ 93.170025][ T5854] overlay: filesystem on ./file0 not supported as upperdir
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555642e7750) = 5855
./strace-static-x86_64: Process 5855 attached
[pid 5855] set_robust_list(0x5555642e7760, 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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5855] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5855] close(3) = 0
[pid 5855] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5855] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5855] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5855] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=3 /* 0.03 s */, si_stime=8 /* 0.08 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5856 attached
, child_tidptr=0x5555642e7750) = 5856
[ 93.479353][ T5855] overlay: filesystem on ./file0 not supported as upperdir
[pid 5856] set_robust_list(0x5555642e7760, 24) = 0
[pid 5856] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5856] setpgid(0, 0) = 0
[pid 5856] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5856] write(3, "1000", 4) = 4
[pid 5856] close(3) = 0
[pid 5856] write(1, "executing program\n", 18executing program
) = 18
[pid 5856] memfd_create("syzkaller", 0) = 3
[pid 5856] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[pid 5856] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid 5856] munmap(0x7fdbcba00000, 138412032) = 0
[pid 5856] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5856] close(3) = 0
[pid 5856] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5856] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5856] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5856] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5856] exit_group(0) = ?
[pid 5856] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5856, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=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
, child_tidptr=0x5555642e7750) = 5857
[pid 5857] set_robust_list(0x5555642e7760, 24) = 0
[pid 5857] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 93.786609][ T5856] overlay: filesystem on ./file0 not supported as upperdir
[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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5857] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5857] close(3) = 0
[pid 5857] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5857] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5857] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5857] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=0, 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 5858 attached
[pid 5858] set_robust_list(0x5555642e7760, 24
[pid 5840] <... clone resumed>, child_tidptr=0x5555642e7750) = 5858
[pid 5858] <... set_robust_list resumed>) = 0
[pid 5858] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5858] setpgid(0, 0) = 0
[pid 5858] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5858] write(3, "1000", 4) = 4
[pid 5858] close(3) = 0
executing program
[pid 5858] write(1, "executing program\n", 18) = 18
[ 94.060069][ T5857] overlay: filesystem on ./file0 not supported as upperdir
[pid 5858] memfd_create("syzkaller", 0) = 3
[pid 5858] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[pid 5858] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid 5858] munmap(0x7fdbcba00000, 138412032) = 0
[pid 5858] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5858] close(3) = 0
[pid 5858] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5858] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5858] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5858] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5858] exit_group(0) = ?
[pid 5858] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5858, si_uid=0, si_status=0, si_utime=2 /* 0.02 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)
[ 94.278186][ T5858] 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 5859 attached
, child_tidptr=0x5555642e7750) = 5859
[pid 5859] set_robust_list(0x5555642e7760, 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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5859] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5859] close(3) = 0
[pid 5859] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5859] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5859] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5859] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=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 5860 attached
, child_tidptr=0x5555642e7750) = 5860
[pid 5860] set_robust_list(0x5555642e7760, 24) = 0
[ 94.574302][ T5859] overlay: filesystem on ./file0 not supported as upperdir
[pid 5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5860] setpgid(0, 0) = 0
[pid 5860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5860] write(3, "1000", 4) = 4
[pid 5860] close(3) = 0
[pid 5860] write(1, "executing program\n", 18executing program
) = 18
[pid 5860] memfd_create("syzkaller", 0) = 3
[pid 5860] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[pid 5860] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid 5860] munmap(0x7fdbcba00000, 138412032) = 0
[pid 5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5860] close(3) = 0
[pid 5860] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5860] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5860] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5860] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5860] exit_group(0) = ?
[pid 5860] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5860, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 94.858928][ T5860] overlay: filesystem on ./file0 not supported as upperdir
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5861 attached
, child_tidptr=0x5555642e7750) = 5861
[pid 5861] set_robust_list(0x5555642e7760, 24) = 0
[pid 5861] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5861] setpgid(0, 0) = 0
[pid 5861] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5861] write(3, "1000", 4) = 4
[pid 5861] close(3) = 0
executing program
[pid 5861] write(1, "executing program\n", 18) = 18
[pid 5861] memfd_create("syzkaller", 0) = 3
[pid 5861] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[pid 5861] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid 5861] munmap(0x7fdbcba00000, 138412032) = 0
[pid 5861] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5861] close(3) = 0
[pid 5861] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5861] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5861] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5861] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5861] exit_group(0) = ?
[pid 5861] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5861, si_uid=0, si_status=0, si_utime=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 5862 attached
, child_tidptr=0x5555642e7750) = 5862
[pid 5862] set_robust_list(0x5555642e7760, 24) = 0
[pid 5862] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 95.083804][ T5861] overlay: filesystem on ./file0 not supported as upperdir
[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
[pid 5862] write(1, "executing program\n", 18executing program
) = 18
[pid 5862] memfd_create("syzkaller", 0) = 3
[pid 5862] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5862] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5862] close(3) = 0
[pid 5862] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5862] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5862] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5862] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555642e7750) = 5864
./strace-static-x86_64: Process 5864 attached
[pid 5864] set_robust_list(0x5555642e7760, 24) = 0
[pid 5864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 95.340359][ T5862] overlay: filesystem on ./file0 not supported as upperdir
[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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5864] close(3) = 0
[pid 5864] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5864] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5864] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5864] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=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 5865 attached
, child_tidptr=0x5555642e7750) = 5865
[pid 5865] set_robust_list(0x5555642e7760, 24) = 0
[pid 5865] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 95.606489][ T5864] overlay: filesystem on ./file0 not supported as upperdir
[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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5865] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5865] close(3) = 0
[pid 5865] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5865] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5865] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5865] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=0, 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 5866 attached
, child_tidptr=0x5555642e7750) = 5866
[ 95.836089][ T5865] overlay: filesystem on ./file0 not supported as upperdir
[pid 5866] set_robust_list(0x5555642e7760, 24) = 0
[pid 5866] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5866] setpgid(0, 0) = 0
[pid 5866] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5866] write(3, "1000", 4) = 4
[pid 5866] close(3) = 0
executing program
[pid 5866] write(1, "executing program\n", 18) = 18
[pid 5866] memfd_create("syzkaller", 0) = 3
[pid 5866] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[pid 5866] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid 5866] munmap(0x7fdbcba00000, 138412032) = 0
[pid 5866] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5866] close(3) = 0
[pid 5866] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5866] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5866] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5866] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5866] exit_group(0) = ?
[pid 5866] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5866, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=8 /* 0.08 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5867 attached
, child_tidptr=0x5555642e7750) = 5867
[pid 5867] set_robust_list(0x5555642e7760, 24) = 0
[ 96.082766][ T5866] overlay: filesystem on ./file0 not supported as upperdir
[pid 5867] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5867] setpgid(0, 0) = 0
[pid 5867] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5867] write(3, "1000", 4) = 4
[pid 5867] close(3) = 0
executing program
[pid 5867] write(1, "executing program\n", 18) = 18
[pid 5867] memfd_create("syzkaller", 0) = 3
[pid 5867] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[pid 5867] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid 5867] munmap(0x7fdbcba00000, 138412032) = 0
[pid 5867] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5867] close(3) = 0
[pid 5867] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5867] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5867] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5867] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5867] exit_group(0) = ?
[pid 5867] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5867, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 96.359739][ T5867] overlay: filesystem on ./file0 not supported as upperdir
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555642e7750) = 5868
./strace-static-x86_64: Process 5868 attached
[pid 5868] set_robust_list(0x5555642e7760, 24) = 0
[pid 5868] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5868] setpgid(0, 0) = 0
[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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5868] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5868] close(3) = 0
[pid 5868] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5868] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5868] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5868] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=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 5869 attached
, child_tidptr=0x5555642e7750) = 5869
[pid 5869] set_robust_list(0x5555642e7760, 24) = 0
[pid 5869] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 96.666544][ T5868] overlay: filesystem on ./file0 not supported as upperdir
[pid 5869] setpgid(0, 0) = 0
[pid 5869] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5869] write(3, "1000", 4) = 4
[pid 5869] close(3) = 0
executing program
[pid 5869] write(1, "executing program\n", 18) = 18
[pid 5869] memfd_create("syzkaller", 0) = 3
[pid 5869] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[pid 5869] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid 5869] munmap(0x7fdbcba00000, 138412032) = 0
[pid 5869] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5869] close(3) = 0
[pid 5869] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5869] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5869] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5869] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5869] exit_group(0) = ?
[pid 5869] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5869, si_uid=0, si_status=0, si_utime=1 /* 0.01 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 5870 attached
, child_tidptr=0x5555642e7750) = 5870
[pid 5870] set_robust_list(0x5555642e7760, 24) = 0
[pid 5870] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 96.905703][ T5869] overlay: filesystem on ./file0 not supported as upperdir
[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(3executing program
) = 0
[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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5870] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5870] close(3) = 0
[pid 5870] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5870] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5870] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5870] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=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 5871 attached
[pid 5871] set_robust_list(0x5555642e7760, 24
[pid 5840] <... clone resumed>, child_tidptr=0x5555642e7750) = 5871
[pid 5871] <... set_robust_list resumed>) = 0
[pid 5871] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5871] setpgid(0, 0) = 0
[ 97.175274][ T5870] overlay: filesystem on ./file0 not supported as upperdir
[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(3executing program
) = 0
[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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5871] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5871] close(3) = 0
[pid 5871] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5871] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5871] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5871] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 97.442089][ T5871] overlay: filesystem on ./file0 not supported as upperdir
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5872 attached
, child_tidptr=0x5555642e7750) = 5872
[pid 5872] set_robust_list(0x5555642e7760, 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
[pid 5872] write(1, "executing program\n", 18executing program
) = 18
[pid 5872] memfd_create("syzkaller", 0) = 3
[pid 5872] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5872] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5872] close(3) = 0
[pid 5872] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5872] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5872] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5872] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=1 /* 0.01 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 5873 attached
, child_tidptr=0x5555642e7750) = 5873
[pid 5873] set_robust_list(0x5555642e7760, 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
[ 97.746879][ T5872] overlay: filesystem on ./file0 not supported as upperdir
[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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5873] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5873] close(3) = 0
[pid 5873] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5873] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5873] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5873] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} ---
[ 98.001785][ T5873] 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 5874 attached
, child_tidptr=0x5555642e7750) = 5874
[pid 5874] set_robust_list(0x5555642e7760, 24) = 0
[pid 5874] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5874] setpgid(0, 0) = 0
[pid 5874] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5874] write(3, "1000", 4) = 4
[pid 5874] close(3) = 0
executing program
[pid 5874] write(1, "executing program\n", 18) = 18
[pid 5874] memfd_create("syzkaller", 0) = 3
[pid 5874] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5874] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5874] close(3) = 0
[pid 5874] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5874] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5874] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5874] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=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 5875 attached
, child_tidptr=0x5555642e7750) = 5875
[pid 5875] set_robust_list(0x5555642e7760, 24) = 0
[pid 5875] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 98.337073][ T5874] overlay: filesystem on ./file0 not supported as upperdir
[pid 5875] setpgid(0, 0) = 0
[pid 5875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5875] write(3, "1000", 4) = 4
[pid 5875] close(3) = 0
executing program
[pid 5875] write(1, "executing program\n", 18) = 18
[pid 5875] memfd_create("syzkaller", 0) = 3
[pid 5875] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5875] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5875] close(3) = 0
[pid 5875] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5875] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5875] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5875] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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 */} ---
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=0x5555642e7750) = 5877
[pid 5877] set_robust_list(0x5555642e7760, 24) = 0
[ 98.590195][ T5875] overlay: filesystem on ./file0 not supported as upperdir
[pid 5877] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5877] setpgid(0, 0) = 0
[pid 5877] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5877] write(3, "1000", 4) = 4
[pid 5877] close(3) = 0
executing program
[pid 5877] write(1, "executing program\n", 18) = 18
[pid 5877] memfd_create("syzkaller", 0) = 3
[pid 5877] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5877] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5877] close(3) = 0
[pid 5877] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5877] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5877] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5877] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=0, si_stime=12 /* 0.12 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5878 attached
[pid 5878] set_robust_list(0x5555642e7760, 24
[pid 5840] <... clone resumed>, child_tidptr=0x5555642e7750) = 5878
[pid 5878] <... set_robust_list resumed>) = 0
[pid 5878] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5878] setpgid(0, 0) = 0
[ 98.885263][ T5877] overlay: filesystem on ./file0 not supported as upperdir
[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
executing program
[pid 5878] write(1, "executing program\n", 18) = 18
[pid 5878] memfd_create("syzkaller", 0) = 3
[pid 5878] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5878] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5878] close(3) = 0
[pid 5878] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5878] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5878] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5878] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=0, si_stime=12 /* 0.12 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5879 attached
, child_tidptr=0x5555642e7750) = 5879
[ 99.160176][ T5878] overlay: filesystem on ./file0 not supported as upperdir
[pid 5879] set_robust_list(0x5555642e7760, 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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5879] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5879] close(3) = 0
[pid 5879] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5879] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5879] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5879] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=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 5880 attached
, child_tidptr=0x5555642e7750) = 5880
[ 99.461777][ T5879] overlay: filesystem on ./file0 not supported as upperdir
[pid 5880] set_robust_list(0x5555642e7760, 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
[pid 5880] write(1, "executing program\n", 18executing program
) = 18
[pid 5880] memfd_create("syzkaller", 0) = 3
[pid 5880] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5880] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5880] close(3) = 0
[pid 5880] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5880] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5880] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5880] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=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)
[ 99.741964][ T5880] 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 5881 attached
, child_tidptr=0x5555642e7750) = 5881
[pid 5881] set_robust_list(0x5555642e7760, 24) = 0
[pid 5881] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5881] setpgid(0, 0) = 0
[pid 5881] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5881] write(3, "1000", 4) = 4
[pid 5881] close(3) = 0
[pid 5881] write(1, "executing program\n", 18executing program
) = 18
[pid 5881] memfd_create("syzkaller", 0) = 3
[pid 5881] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[pid 5881] 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 5881] munmap(0x7fdbcba00000, 138412032) = 0
[pid 5881] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5881] close(3) = 0
[pid 5881] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5881] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5881] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5881] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./file0,") = -1 EINVAL (Invalid argument)
[pid 5881] exit_group(0) = ?
[pid 5881] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5881, 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 5882 attached
[pid 5882] set_robust_list(0x5555642e7760, 24
[pid 5840] <... clone resumed>, child_tidptr=0x5555642e7750) = 5882
[pid 5882] <... set_robust_list resumed>) = 0
[pid 5882] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 100.109647][ T5881] overlay: filesystem on ./file0 not supported as upperdir
[pid 5882] setpgid(0, 0) = 0
[pid 5882] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5882] write(3, "1000", 4) = 4
[pid 5882] close(3) = 0
executing program
[pid 5882] write(1, "executing program\n", 18) = 18
[pid 5882] memfd_create("syzkaller", 0) = 3
[pid 5882] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5882] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5882] close(3) = 0
[pid 5882] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5882] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5882] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5882] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=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 5883 attached
, child_tidptr=0x5555642e7750) = 5883
[ 100.361529][ T5882] overlay: filesystem on ./file0 not supported as upperdir
[pid 5883] set_robust_list(0x5555642e7760, 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
executing program
[pid 5883] write(1, "executing program\n", 18) = 18
[pid 5883] memfd_create("syzkaller", 0) = 3
[pid 5883] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5883] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5883] close(3) = 0
[pid 5883] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5883] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5883] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5883] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=0, si_stime=12 /* 0.12 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5884 attached
, child_tidptr=0x5555642e7750) = 5884
[ 100.648640][ T5883] overlay: filesystem on ./file0 not supported as upperdir
[pid 5884] set_robust_list(0x5555642e7760, 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) = 0x7fdbcba00000
[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(0x7fdbcba00000, 138412032) = 0
[pid 5884] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5884] close(3) = 0
[pid 5884] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5884] mkdir("./bus", 0777) = -1 EEXIST (File exists)
[pid 5884] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid 5884] mount(NULL, "./file0", "overlay", MS_NOEXEC, "workdir=./bus,lowerdir=.,upperdir=./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=9 /* 0.09 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)