./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2441445912

<...>
Warning: Permanently added '10.128.0.13' (ED25519) to the list of known hosts.
execve("./syz-executor2441445912", ["./syz-executor2441445912"], 0x7ffd568bf8d0 /* 10 vars */) = 0
brk(NULL)                               = 0x5555758ac000
brk(0x5555758ace00)                     = 0x5555758ace00
arch_prctl(ARCH_SET_FS, 0x5555758ac480) = 0
set_tid_address(0x5555758ac750)         = 5822
set_robust_list(0x5555758ac760, 24)     = 0
rseq(0x5555758acda0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor2441445912", 4096) = 28
getrandom("\xf2\x3a\xea\x78\xeb\x22\xfe\x1f", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x5555758ace00
brk(0x5555758cde00)                     = 0x5555758cde00
brk(0x5555758ce000)                     = 0x5555758ce000
mprotect(0x7f30df6d1000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
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=0x7f30df623a50, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f30df62c420}, NULL, 8) = 0
rt_sigaction(SIGBUS, {sa_handler=0x7f30df623a50, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f30df62c420}, 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 5823 attached
 <unfinished ...>
[pid  5823] set_robust_list(0x5555758ac760, 24 <unfinished ...>
[pid  5822] <... clone resumed>, child_tidptr=0x5555758ac750) = 5823
[pid  5823] <... set_robust_list resumed>) = 0
[pid  5823] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5823] setpgid(0, 0)               = 0
[pid  5823] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5823] write(3, "1000", 4)         = 4
[pid  5823] close(3)                    = 0
[pid  5823] write(1, "executing program\n", 18executing program
) = 18
[pid  5823] memfd_create("syzkaller", 0) = 3
[pid  5823] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[pid  5823] 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  5823] munmap(0x7f30d7200000, 138412032) = 0
[pid  5823] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5823] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5823] close(3)                    = 0
[pid  5823] close(4)                    = 0
[pid  5823] mkdir("./file1", 0777)      = 0
[   80.883245][ T5823] loop0: detected capacity change from 0 to 32768
[pid  5823] mount("/dev/loop0", "./file1", "ocfs2", MS_I_VERSION|MS_LAZYTIME, "localalloc=18446744073709551608,resv_level=00000000000000000002,heartbeat=none,coherency=buffered,er"...) = 0
[pid  5823] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid  5823] chdir("./file1")            = 0
[pid  5823] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5823] mkdir("./file0", 0777)      = 0
[pid  5823] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5823] mkdir("./file2", 0777)      = 0
[   80.951604][ T5823] JBD2: Ignoring recovery information on journal
[   80.985255][ T5823] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
[pid  5823] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[   81.054243][ T5823] overlayfs: upper fs does not support tmpfile.
[   81.065615][ T5823] overlayfs: upper fs does not support RENAME_WHITEOUT.
[   81.076349][ T5823] 
[   81.078746][ T5823] ======================================================
[   81.088132][ T5823] WARNING: possible circular locking dependency detected
[   81.096871][ T5823] 6.13.0-rc2-syzkaller-00159-gf932fb9b4074 #0 Not tainted
[   81.106054][ T5823] ------------------------------------------------------
[   81.114228][ T5823] syz-executor244/5823 is trying to acquire lock:
[   81.121287][ T5823] ffff888060fea640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x132/0x2840
[   81.136589][ T5823] 
[   81.136589][ T5823] but task is already holding lock:
[   81.144778][ T5823] ffff888060fedc78 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x633/0x1930
[   81.156708][ T5823] 
[   81.156708][ T5823] which lock already depends on the new lock.
[   81.156708][ T5823] 
[   81.168676][ T5823] 
[   81.168676][ T5823] the existing dependency chain (in reverse order) is:
[   81.179448][ T5823] 
[   81.179448][ T5823] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}:
[   81.188202][ T5823]        lock_acquire+0x1ed/0x550
[   81.193607][ T5823]        down_write+0x99/0x220
[   81.199027][ T5823]        ocfs2_xattr_set_handle+0x539/0xa10
[   81.207811][ T5823]        ocfs2_init_security_set+0xbd/0xd0
[   81.214966][ T5823]        ocfs2_mknod+0x1ccf/0x2b30
[   81.221171][ T5823]        ocfs2_mkdir+0x1ab/0x470
[   81.226249][ T5823]        vfs_mkdir+0x2f9/0x4f0
[   81.232501][ T5823]        do_mkdirat+0x264/0x3a0
[   81.238089][ T5823]        __x64_sys_mkdir+0x6c/0x80
[   81.243755][ T5823]        do_syscall_64+0xf3/0x230
[   81.249080][ T5823]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   81.258199][ T5823] 
[   81.258199][ T5823] -> #3 (jbd2_handle){.+.+}-{0:0}:
[   81.269637][ T5823]        lock_acquire+0x1ed/0x550
[   81.277404][ T5823]        start_this_handle+0x1eb4/0x2110
[   81.284345][ T5823]        jbd2__journal_start+0x2da/0x5d0
[   81.290639][ T5823]        jbd2_journal_start+0x29/0x40
[   81.298848][ T5823]        ocfs2_start_trans+0x3c9/0x700
[   81.306094][ T5823]        ocfs2_reserve_suballoc_bits+0x9f6/0x4e70
[   81.312702][ T5823]        ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0
[   81.321179][ T5823]        ocfs2_mknod+0x143a/0x2b30
[   81.327817][ T5823]        ocfs2_mkdir+0x1ab/0x470
[   81.334369][ T5823]        vfs_mkdir+0x2f9/0x4f0
[   81.341230][ T5823]        do_mkdirat+0x264/0x3a0
[   81.347666][ T5823]        __x64_sys_mkdir+0x6c/0x80
[   81.355225][ T5823]        do_syscall_64+0xf3/0x230
[   81.363579][ T5823]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   81.372838][ T5823] 
[   81.372838][ T5823] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
[   81.383307][ T5823]        lock_acquire+0x1ed/0x550
[   81.390348][ T5823]        down_read+0xb1/0xa40
[   81.396197][ T5823]        ocfs2_start_trans+0x3be/0x700
[   81.402514][ T5823]        ocfs2_reserve_suballoc_bits+0x9f6/0x4e70
[   81.410141][ T5823]        ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0
[   81.417820][ T5823]        ocfs2_mknod+0x143a/0x2b30
[   81.423536][ T5823]        ocfs2_mkdir+0x1ab/0x470
[   81.429198][ T5823]        vfs_mkdir+0x2f9/0x4f0
[   81.434266][ T5823]        do_mkdirat+0x264/0x3a0
[   81.440081][ T5823]        __x64_sys_mkdir+0x6c/0x80
[   81.446237][ T5823]        do_syscall_64+0xf3/0x230
[   81.451851][ T5823]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   81.460794][ T5823] 
[   81.460794][ T5823] -> #1 (sb_internal#2){.+.+}-{0:0}:
[   81.471003][ T5823]        lock_acquire+0x1ed/0x550
[   81.476185][ T5823]        ocfs2_start_trans+0x2b9/0x700
[   81.483271][ T5823]        ocfs2_mknod+0x150c/0x2b30
[   81.490212][ T5823]        ocfs2_mkdir+0x1ab/0x470
[   81.497154][ T5823]        vfs_mkdir+0x2f9/0x4f0
[   81.504224][ T5823]        do_mkdirat+0x264/0x3a0
[   81.510028][ T5823]        __x64_sys_mkdir+0x6c/0x80
[   81.517453][ T5823]        do_syscall_64+0xf3/0x230
[   81.524386][ T5823]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   81.531825][ T5823] 
[   81.531825][ T5823] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}:
[   81.544678][ T5823]        validate_chain+0x18ef/0x5920
[   81.551219][ T5823]        __lock_acquire+0x1397/0x2100
[   81.559794][ T5823]        lock_acquire+0x1ed/0x550
[   81.565723][ T5823]        down_write+0x99/0x220
[   81.571871][ T5823]        ocfs2_reserve_local_alloc_bits+0x132/0x2840
[   81.580829][ T5823]        ocfs2_reserve_clusters_with_limit+0x1b8/0xb60
[   81.590071][ T5823]        ocfs2_init_xattr_set_ctxt+0x420/0x8e0
[   81.597099][ T5823]        ocfs2_xattr_set+0xf4e/0x1930
[   81.603095][ T5823]        __vfs_setxattr+0x468/0x4a0
[   81.609643][ T5823]        __vfs_setxattr_noperm+0x12e/0x660
[   81.616041][ T5823]        vfs_setxattr+0x221/0x430
[   81.622499][ T5823]        ovl_get_workdir+0xd90/0x1920
[   81.628120][ T5823]        ovl_fill_super+0x12a8/0x3560
[   81.634820][ T5823]        get_tree_nodev+0xb7/0x140
[   81.641688][ T5823]        vfs_get_tree+0x90/0x2b0
[   81.647529][ T5823]        do_new_mount+0x2be/0xb40
[   81.654458][ T5823]        __se_sys_mount+0x2d6/0x3c0
[   81.660430][ T5823]        do_syscall_64+0xf3/0x230
[   81.666047][ T5823]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   81.674256][ T5823] 
[   81.674256][ T5823] other info that might help us debug this:
[   81.674256][ T5823] 
[   81.688233][ T5823] Chain exists of:
[   81.688233][ T5823]   &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> jbd2_handle --> &oi->ip_xattr_sem
[   81.688233][ T5823] 
[   81.708765][ T5823]  Possible unsafe locking scenario:
[   81.708765][ T5823] 
[   81.718267][ T5823]        CPU0                    CPU1
[   81.723838][ T5823]        ----                    ----
[   81.729995][ T5823]   lock(&oi->ip_xattr_sem);
[   81.735147][ T5823]                                lock(jbd2_handle);
[   81.744276][ T5823]                                lock(&oi->ip_xattr_sem);
[   81.753111][ T5823]   lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
[   81.762153][ T5823] 
[   81.762153][ T5823]  *** DEADLOCK ***
[   81.762153][ T5823] 
[   81.771714][ T5823] 4 locks held by syz-executor244/5823:
[   81.778152][ T5823]  #0: ffff88807a5b60e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0
[   81.790299][ T5823]  #1: ffff888060a52420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90
[   81.800281][ T5823]  #2: ffff888060fedf40 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x1e1/0x430
[   81.811388][ T5823]  #3: ffff888060fedc78 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x633/0x1930
[   81.823637][ T5823] 
[   81.823637][ T5823] stack backtrace:
[   81.831405][ T5823] CPU: 1 UID: 0 PID: 5823 Comm: syz-executor244 Not tainted 6.13.0-rc2-syzkaller-00159-gf932fb9b4074 #0
[   81.845298][ T5823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
[   81.856677][ T5823] Call Trace:
[   81.860654][ T5823]  <TASK>
[   81.864389][ T5823]  dump_stack_lvl+0x241/0x360
[   81.869972][ T5823]  ? __pfx_dump_stack_lvl+0x10/0x10
[   81.875832][ T5823]  ? __pfx__printk+0x10/0x10
[   81.882743][ T5823]  print_circular_bug+0x13a/0x1b0
[   81.889824][ T5823]  check_noncircular+0x36a/0x4a0
[   81.895587][ T5823]  ? __pfx_check_noncircular+0x10/0x10
[   81.901990][ T5823]  ? lockdep_lock+0x123/0x2b0
[   81.907430][ T5823]  validate_chain+0x18ef/0x5920
[   81.913457][ T5823]  ? __pfx_validate_chain+0x10/0x10
[   81.919226][ T5823]  ? __pfx_validate_chain+0x10/0x10
[   81.925961][ T5823]  ? mark_lock+0x9a/0x360
[   81.930967][ T5823]  ? ocfs2_get_system_file_inode+0x1d4/0x7b0
[   81.937736][ T5823]  ? __pfx_lock_release+0x10/0x10
[   81.943661][ T5823]  ? mark_lock+0x9a/0x360
[   81.948607][ T5823]  __lock_acquire+0x1397/0x2100
[   81.954882][ T5823]  lock_acquire+0x1ed/0x550
[   81.960330][ T5823]  ? ocfs2_reserve_local_alloc_bits+0x132/0x2840
[   81.969216][ T5823]  ? __pfx_lock_acquire+0x10/0x10
[   81.975491][ T5823]  ? __pfx___might_resched+0x10/0x10
[   81.981186][ T5823]  ? __pfx_ocfs2_get_system_file_inode+0x10/0x10
[   81.989597][ T5823]  ? __pfx_validate_chain+0x10/0x10
[   81.997068][ T5823]  ? lockdep_hardirqs_on_prepare+0x43d/0x780
[   82.004316][ T5823]  down_write+0x99/0x220
[   82.010567][ T5823]  ? ocfs2_reserve_local_alloc_bits+0x132/0x2840
[   82.018072][ T5823]  ? __pfx_down_write+0x10/0x10
[   82.024867][ T5823]  ocfs2_reserve_local_alloc_bits+0x132/0x2840
[   82.031257][ T5823]  ? mark_lock+0x9a/0x360
[   82.036273][ T5823]  ? __lock_acquire+0x1397/0x2100
[   82.041437][ T5823]  ? __pfx_ocfs2_reserve_local_alloc_bits+0x10/0x10
[   82.050831][ T5823]  ? __pfx_lock_acquire+0x10/0x10
[   82.056467][ T5823]  ? ocfs2_alloc_should_use_local+0x155/0x320
[   82.063402][ T5823]  ? __pfx_lock_release+0x10/0x10
[   82.069419][ T5823]  ? do_raw_spin_lock+0x14f/0x370
[   82.074930][ T5823]  ? do_raw_spin_unlock+0x13c/0x8b0
[   82.080543][ T5823]  ? _raw_spin_unlock+0x28/0x50
[   82.086316][ T5823]  ? ocfs2_alloc_should_use_local+0x155/0x320
[   82.095669][ T5823]  ocfs2_reserve_clusters_with_limit+0x1b8/0xb60
[   82.102783][ T5823]  ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10
[   82.110427][ T5823]  ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10
[   82.117011][ T5823]  ? ocfs2_xattr_set+0xf00/0x1930
[   82.122540][ T5823]  ocfs2_init_xattr_set_ctxt+0x420/0x8e0
[   82.128478][ T5823]  ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10
[   82.135303][ T5823]  ? up_write+0x1a9/0x590
[   82.139671][ T5823]  ? __pfx_ocfs2_truncate_log_needs_flush+0x10/0x10
[   82.146683][ T5823]  ? __pfx_up_write+0x10/0x10
[   82.151409][ T5823]  ? __kmalloc_cache_noprof+0x243/0x390
[   82.157167][ T5823]  ? ocfs2_xattr_set+0x4d5/0x1930
[   82.163538][ T5823]  ocfs2_xattr_set+0xf4e/0x1930
[   82.168545][ T5823]  ? __pfx_ocfs2_xattr_set+0x10/0x10
[   82.174983][ T5823]  ? _prb_read_valid+0xa39/0xac0
[   82.180928][ T5823]  ? mark_lock+0x9a/0x360
[   82.185652][ T5823]  ? smk_tskacc+0x300/0x370
[   82.190224][ T5823]  ? posix_xattr_acl+0xa9/0xd0
[   82.195233][ T5823]  ? evm_protect_xattr+0x4be/0xb30
[   82.200928][ T5823]  ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10
[   82.207205][ T5823]  __vfs_setxattr+0x468/0x4a0
[   82.212195][ T5823]  __vfs_setxattr_noperm+0x12e/0x660
[   82.217892][ T5823]  vfs_setxattr+0x221/0x430
[   82.222690][ T5823]  ? __pfx_vfs_setxattr+0x10/0x10
[   82.228691][ T5823]  ? _raw_spin_unlock+0x28/0x50
[   82.233834][ T5823]  ? dput+0x37/0x2b0
[   82.238032][ T5823]  ovl_get_workdir+0xd90/0x1920
[   82.243288][ T5823]  ? __pfx_ovl_get_workdir+0x10/0x10
[   82.248963][ T5823]  ? ovl_inuse_trylock+0xab/0xf0
[   82.254399][ T5823]  ? do_raw_spin_lock+0x14f/0x370
[   82.260185][ T5823]  ? _raw_spin_unlock+0x28/0x50
[   82.265736][ T5823]  ? ovl_inuse_trylock+0xab/0xf0
[   82.271148][ T5823]  ovl_fill_super+0x12a8/0x3560
[   82.276965][ T5823]  ? __pfx___mutex_trylock_common+0x10/0x10
[   82.284638][ T5823]  ? shrinker_register+0x118/0x230
[   82.290865][ T5823]  ? __pfx_lock_release+0x10/0x10
[   82.296241][ T5823]  ? __pfx_ovl_fill_super+0x10/0x10
[   82.301679][ T5823]  ? __pfx_lockdep_init_map_type+0x10/0x10
[   82.307953][ T5823]  ? __pfx___mutex_lock+0x10/0x10
[   82.313679][ T5823]  ? __pfx___mutex_unlock_slowpath+0x10/0x10
[   82.320079][ T5823]  ? sget_fc+0x909/0x9c0
[   82.324537][ T5823]  ? __pfx_set_anon_super_fc+0x10/0x10
[   82.331850][ T5823]  ? __pfx_ovl_fill_super+0x10/0x10
[   82.337704][ T5823]  get_tree_nodev+0xb7/0x140
[   82.343168][ T5823]  vfs_get_tree+0x90/0x2b0
[   82.348010][ T5823]  do_new_mount+0x2be/0xb40
[   82.353658][ T5823]  ? __pfx_do_new_mount+0x10/0x10
[   82.359044][ T5823]  __se_sys_mount+0x2d6/0x3c0
[   82.364645][ T5823]  ? __pfx___se_sys_mount+0x10/0x10
[   82.370332][ T5823]  ? exc_page_fault+0x590/0x8b0
[   82.375332][ T5823]  ? __x64_sys_mount+0x20/0xc0
[   82.380224][ T5823]  do_syscall_64+0xf3/0x230
[   82.384874][ T5823]  ? clear_bhb_loop+0x35/0x90
[   82.389792][ T5823]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   82.396327][ T5823] RIP: 0033:0x7f30df6594d9
[   82.401026][ T5823] 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
[   82.422080][ T5823] RSP: 002b:00007fff05f79048 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   82.430895][ T5823] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f30df6594d9
[   82.439182][ T5823] RDX: 0000000020000000 RSI: 0000000020000080 RDI: 0000000000000000
[   82.447261][ T5823] RBP: 0000000000000000 R08: 0000000020000140 R09: 00007fff05f79080
[   82.455261][ T5823] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff05f79080
[pid  5823] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -1 EINVAL (Invalid argument)
[pid  5823] exit_group(0)               = ?
[pid  5823] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5823, si_uid=0, si_status=0, si_utime=6 /* 0.06 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)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5827 attached
, child_tidptr=0x5555758ac750) = 5827
[pid  5827] set_robust_list(0x5555758ac760, 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
[pid  5827] write(3, "1000", 4)         = 4
[pid  5827] close(3)                    = 0
executing program
[pid  5827] write(1, "executing program\n", 18) = 18
[   82.463905][ T5823] R13: 00007fff05f79308 R14: 431bde82d7b634db R15: 00007f30df6a203b
[   82.471905][ T5823]  </TASK>
[   82.476955][ T5823] overlayfs: upper fs missing required features.
[pid  5827] memfd_create("syzkaller", 0) = 3
[pid  5827] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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)      = 0
[pid  5827] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5827] mkdir("./file2", 0777)      = 0
[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,,") = 0
[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=4 /* 0.04 s */, si_stime=13 /* 0.13 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 5828 attached
 <unfinished ...>
[pid  5828] set_robust_list(0x5555758ac760, 24 <unfinished ...>
[pid  5822] <... clone resumed>, child_tidptr=0x5555758ac750) = 5828
[pid  5828] <... set_robust_list resumed>) = 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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=13 /* 0.13 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 5829 attached
, child_tidptr=0x5555758ac750) = 5829
[pid  5829] set_robust_list(0x5555758ac760, 24) = 0
[pid  5829] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   83.032388][ T5828] overlay: filesystem on ./file0 not supported as upperdir
[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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=14 /* 0.14 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   83.344632][ T5829] 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 5830 attached
, child_tidptr=0x5555758ac750) = 5830
[pid  5830] set_robust_list(0x5555758ac760, 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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=12 /* 0.12 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 5831 attached
, child_tidptr=0x5555758ac750) = 5831
[   83.701086][ T5830] overlay: filesystem on ./file0 not supported as upperdir
[pid  5831] set_robust_list(0x5555758ac760, 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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=10 /* 0.10 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   84.046611][ 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=0x5555758ac750) = 5832
[pid  5832] set_robust_list(0x5555758ac760, 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
[pid  5832] write(1, "executing program\n", 18executing program
) = 18
[pid  5832] memfd_create("syzkaller", 0) = 3
[pid  5832] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=3 /* 0.03 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 5833 attached
[   84.397219][ T5832] overlay: filesystem on ./file0 not supported as upperdir
 <unfinished ...>
[pid  5833] set_robust_list(0x5555758ac760, 24 <unfinished ...>
[pid  5822] <... clone resumed>, child_tidptr=0x5555758ac750) = 5833
[pid  5833] <... set_robust_list resumed>) = 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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=2 /* 0.02 s */, si_stime=13 /* 0.13 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 5834 attached
, child_tidptr=0x5555758ac750) = 5834
[   84.761774][ T5833] overlay: filesystem on ./file0 not supported as upperdir
[pid  5834] set_robust_list(0x5555758ac760, 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
[pid  5834] write(1, "executing program\n", 18executing program
) = 18
[pid  5834] memfd_create("syzkaller", 0) = 3
[pid  5834] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=4 /* 0.04 s */, si_stime=12 /* 0.12 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   85.119012][ 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=0x5555758ac750) = 5835
[pid  5835] set_robust_list(0x5555758ac760, 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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=14 /* 0.14 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=0x5555758ac750) = 5836
[pid  5836] set_robust_list(0x5555758ac760, 24) = 0
[   85.470314][ T5835] overlay: filesystem on ./file0 not supported as upperdir
[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
[pid  5836] write(1, "executing program\n", 18executing program
) = 18
[pid  5836] memfd_create("syzkaller", 0) = 3
[pid  5836] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=4 /* 0.04 s */, si_stime=10 /* 0.10 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   85.736613][ T5836] 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 5837 attached
, child_tidptr=0x5555758ac750) = 5837
[pid  5837] set_robust_list(0x5555758ac760, 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
[pid  5837] write(1, "executing program\n", 18executing program
) = 18
[pid  5837] memfd_create("syzkaller", 0) = 3
[pid  5837] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=2 /* 0.02 s */, si_stime=12 /* 0.12 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   86.059328][ 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=0x5555758ac750) = 5838
[pid  5838] set_robust_list(0x5555758ac760, 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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=3 /* 0.03 s */, si_stime=11 /* 0.11 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5839 attached
, child_tidptr=0x5555758ac750) = 5839
[   86.438917][ T5838] overlay: filesystem on ./file0 not supported as upperdir
[pid  5839] set_robust_list(0x5555758ac760, 24) = 0
[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(3executing program
)                    = 0
[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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=13 /* 0.13 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   86.765401][ T5839] 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 5840 attached
, child_tidptr=0x5555758ac750) = 5840
[pid  5840] set_robust_list(0x5555758ac760, 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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=16 /* 0.16 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 5842 attached
, child_tidptr=0x5555758ac750) = 5842
[   87.138925][ T5840] overlay: filesystem on ./file0 not supported as upperdir
[pid  5842] set_robust_list(0x5555758ac760, 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(3executing program
)                    = 0
[pid  5842] write(1, "executing program\n", 18) = 18
[pid  5842] memfd_create("syzkaller", 0) = 3
[pid  5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   87.449009][ 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=0x5555758ac750) = 5843
[pid  5843] set_robust_list(0x5555758ac760, 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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=4 /* 0.04 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 5844 attached
, child_tidptr=0x5555758ac750) = 5844
[   87.818543][ T5843] overlay: filesystem on ./file0 not supported as upperdir
[pid  5844] set_robust_list(0x5555758ac760, 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
executing program
[pid  5844] write(1, "executing program\n", 18) = 18
[pid  5844] memfd_create("syzkaller", 0) = 3
[pid  5844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   88.143130][ 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=0x5555758ac750) = 5845
[pid  5845] set_robust_list(0x5555758ac760, 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
[pid  5845] write(1, "executing program\n", 18executing program
) = 18
[pid  5845] memfd_create("syzkaller", 0) = 3
[pid  5845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=1 /* 0.01 s */, si_stime=13 /* 0.13 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 5846 attached
, child_tidptr=0x5555758ac750) = 5846
[pid  5846] set_robust_list(0x5555758ac760, 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) = 0x7f30d7200000
[   88.381512][ T5845] overlay: filesystem on ./file0 not supported as upperdir
[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(0x7f30d7200000, 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] 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=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   88.643907][ 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=0x5555758ac750) = 5847
[pid  5847] set_robust_list(0x5555758ac760, 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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=3 /* 0.03 s */, si_stime=12 /* 0.12 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 5848 attached
, child_tidptr=0x5555758ac750) = 5848
[   88.991208][ T5847] overlay: filesystem on ./file0 not supported as upperdir
[pid  5848] set_robust_list(0x5555758ac760, 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
[pid  5848] write(1, "executing program\n", 18executing program
) = 18
[pid  5848] memfd_create("syzkaller", 0) = 3
[pid  5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=1 /* 0.01 s */, si_stime=12 /* 0.12 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   89.318513][ 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=0x5555758ac750) = 5849
[pid  5849] set_robust_list(0x5555758ac760, 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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=13 /* 0.13 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   89.625045][ T5849] 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 5850 attached
, child_tidptr=0x5555758ac750) = 5850
[pid  5850] set_robust_list(0x5555758ac760, 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
[pid  5850] write(1, "executing program\n", 18executing program
) = 18
[pid  5850] memfd_create("syzkaller", 0) = 3
[pid  5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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] exit_group(0)               = ?
[pid  5850] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5850, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=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 5851 attached
, child_tidptr=0x5555758ac750) = 5851
[pid  5851] set_robust_list(0x5555758ac760, 24) = 0
[pid  5851] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   89.944906][ T5850] overlay: filesystem on ./file0 not supported as upperdir
[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) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=1 /* 0.01 s */, si_stime=14 /* 0.14 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=0x5555758ac750) = 5852
[pid  5852] set_robust_list(0x5555758ac760, 24) = 0
[   90.263123][ T5851] overlay: filesystem on ./file0 not supported as upperdir
[pid  5852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5852] setpgid(0, 0)               = 0
[pid  5852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5852] write(3, "1000", 4)         = 4
[pid  5852] close(3)                    = 0
executing program
[pid  5852] write(1, "executing program\n", 18) = 18
[pid  5852] memfd_create("syzkaller", 0) = 3
[pid  5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f30d7200000
[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(0x7f30d7200000, 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] 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=15 /* 0.15 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   90.578614][ T5852] overlay: filesystem on ./file0 not supported as upperdir
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5853 attached
, child_tidptr=0x5555758ac750) = 5853
[pid  5853] set_robust_list(0x5555758ac760, 24) = 0
[pid  5853] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5853] setpgid(0, 0)               = 0
[pid  5853] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5853] write(3, "1000", 4)         = 4
[pid  5853] close(3)                    = 0
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) = 0x7f30d7200000
[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(0x7f30d7200000, 138412032) = 0
[pid  5853] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5853] close(3)                    = 0
[pid  5853] mkdir("./file0", 0777)      = -1 EEXIST (File exists)
[pid  5853] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5853] mkdir("./file2", 0777)      = -1 EEXIST (File exists)
[pid  5853] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5853] mount(NULL, "./file0", "overlay", 0, "workdir=./file0,lowerdir=.,upperdir=./file2,,") = -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=12 /* 0.12 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   90.921727][ T5853] 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 5854 attached
, child_tidptr=0x5555758ac750) = 5854
[pid  5854] set_robust_list(0x5555758ac760, 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) = 0x7f30d7200000