./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2799241119

<...>
Warning: Permanently added '10.128.0.82' (ED25519) to the list of known hosts.
execve("./syz-executor2799241119", ["./syz-executor2799241119"], 0x7ffee260a660 /* 10 vars */) = 0
brk(NULL)                               = 0x555567631000
brk(0x555567631e00)                     = 0x555567631e00
arch_prctl(ARCH_SET_FS, 0x555567631480) = 0
set_tid_address(0x555567631750)         = 5834
set_robust_list(0x555567631760, 24)     = 0
rseq(0x555567631da0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor2799241119", 4096) = 28
getrandom("\x67\x20\x3f\x1c\x08\x10\xa1\x8f", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555567631e00
brk(0x555567652e00)                     = 0x555567652e00
brk(0x555567653000)                     = 0x555567653000
mprotect(0x7f1bcc897000, 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=0x7f1bcc7e9a60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f1bcc7f24e0}, NULL, 8) = 0
rt_sigaction(SIGBUS, {sa_handler=0x7f1bcc7e9a60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f1bcc7f24e0}, 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 5835 attached
 <unfinished ...>
[pid  5835] set_robust_list(0x555567631760, 24) = 0
[pid  5835] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5834] <... clone resumed>, child_tidptr=0x555567631750) = 5835
[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
executing program
[pid  5835] write(1, "executing program\n", 18) = 18
[pid  5835] memfd_create("syzkaller", 0) = 3
[pid  5835] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5835] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5835] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5835] close(3)                    = 0
[pid  5835] close(4)                    = 0
[pid  5835] mkdir("./file1", 0777)      = 0
[  104.750045][ T5835] loop0: detected capacity change from 0 to 32768
[  104.777355][ T5835] =======================================================
[  104.777355][ T5835] WARNING: The mand mount option has been deprecated and
[  104.777355][ T5835]          and is ignored by this kernel. Remove the mand
[  104.777355][ T5835]          option from the mount to silence this warning.
[  104.777355][ T5835] =======================================================
[pid  5835] mount("/dev/loop0", "./file1", "ocfs2", MS_MANDLOCK|MS_DIRSYNC|MS_NODIRATIME, "nouser_xattr,heartbeat=none,errors=remount-ro,coherency=full,errors=continue,data=writeback,errors=r"...) = 0
[pid  5835] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid  5835] chdir("./file1")            = 0
[pid  5835] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5835] mkdir("./bus", 0777)        = 0
[  104.851964][ T5835] ocfs2: Mounting device (7,0) on (node local, slot 0) with writeback data mode.
[pid  5835] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5835] mkdirat(AT_FDCWD, "./file1", 000) = 0
[pid  5835] mkdirat(AT_FDCWD, "./file0", 000) = 0
[  104.942252][ T5835] overlayfs: upper fs does not support tmpfile.
[  104.951802][ T5835] overlayfs: upper fs does not support RENAME_WHITEOUT.
[  104.961220][ T5835] 
[  104.964177][ T5835] ======================================================
[  104.971740][ T5835] WARNING: possible circular locking dependency detected
[  104.979637][ T5835] 6.16.0-rc1-syzkaller-00236-g8c6bc74c7f89 #0 Not tainted
[  104.987426][ T5835] ------------------------------------------------------
[  104.994759][ T5835] syz-executor279/5835 is trying to acquire lock:
[  105.001865][ T5835] ffff888074022640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[  105.016126][ T5835] 
[  105.016126][ T5835] but task is already holding lock:
[  105.024241][ T5835] ffff888074024e38 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[  105.034766][ T5835] 
[  105.034766][ T5835] which lock already depends on the new lock.
[  105.034766][ T5835] 
[  105.046550][ T5835] 
[  105.046550][ T5835] the existing dependency chain (in reverse order) is:
[  105.056131][ T5835] 
[  105.056131][ T5835] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}:
[  105.064197][ T5835]        lock_acquire+0x120/0x360
[  105.069564][ T5835]        down_write+0x96/0x1f0
[  105.076100][ T5835]        ocfs2_xattr_set_handle+0x3b0/0x7a0
[  105.082565][ T5835]        ocfs2_init_security_set+0xbd/0xe0
[  105.088671][ T5835]        ocfs2_mknod+0x137f/0x2050
[  105.094002][ T5835]        ocfs2_mkdir+0x191/0x440
[  105.099236][ T5835]        vfs_mkdir+0x306/0x510
[  105.105704][ T5835]        do_mkdirat+0x247/0x590
[  105.111122][ T5835]        __x64_sys_mkdir+0x6c/0x80
[  105.119435][ T5835]        do_syscall_64+0xfa/0x3b0
[  105.124686][ T5835]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  105.131666][ T5835] 
[  105.131666][ T5835] -> #3 (jbd2_handle){.+.+}-{0:0}:
[  105.139701][ T5835]        lock_acquire+0x120/0x360
[  105.145632][ T5835]        start_this_handle+0x1fa7/0x21c0
[  105.152890][ T5835]        jbd2__journal_start+0x2c1/0x5b0
[  105.160021][ T5835]        jbd2_journal_start+0x2a/0x40
[  105.167343][ T5835]        ocfs2_start_trans+0x376/0x6d0
[  105.175778][ T5835]        ocfs2_reserve_suballoc_bits+0x711/0x4640
[  105.183465][ T5835]        ocfs2_reserve_new_inode+0x4f4/0xcc0
[  105.189829][ T5835]        ocfs2_mknod+0x83c/0x2050
[  105.196192][ T5835]        ocfs2_mkdir+0x191/0x440
[  105.201438][ T5835]        vfs_mkdir+0x306/0x510
[  105.206601][ T5835]        do_mkdirat+0x247/0x590
[  105.211748][ T5835]        __x64_sys_mkdir+0x6c/0x80
[  105.217518][ T5835]        do_syscall_64+0xfa/0x3b0
[  105.222662][ T5835]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  105.229088][ T5835] 
[  105.229088][ T5835] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
[  105.237794][ T5835]        lock_acquire+0x120/0x360
[  105.242930][ T5835]        down_read+0x46/0x2e0
[  105.247615][ T5835]        ocfs2_start_trans+0x36a/0x6d0
[  105.253466][ T5835]        ocfs2_reserve_suballoc_bits+0x711/0x4640
[  105.259893][ T5835]        ocfs2_reserve_new_inode+0x4f4/0xcc0
[  105.265976][ T5835]        ocfs2_mknod+0x83c/0x2050
[  105.271042][ T5835]        ocfs2_mkdir+0x191/0x440
[  105.276102][ T5835]        vfs_mkdir+0x306/0x510
[  105.280904][ T5835]        do_mkdirat+0x247/0x590
[  105.285768][ T5835]        __x64_sys_mkdir+0x6c/0x80
[  105.291112][ T5835]        do_syscall_64+0xfa/0x3b0
[  105.296194][ T5835]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  105.302669][ T5835] 
[  105.302669][ T5835] -> #1 (sb_internal#2){.+.+}-{0:0}:
[  105.310899][ T5835]        lock_acquire+0x120/0x360
[  105.316149][ T5835]        ocfs2_start_trans+0x26b/0x6d0
[  105.322000][ T5835]        ocfs2_mknod+0xe93/0x2050
[  105.327343][ T5835]        ocfs2_mkdir+0x191/0x440
[  105.332319][ T5835]        vfs_mkdir+0x306/0x510
[  105.337381][ T5835]        do_mkdirat+0x247/0x590
[  105.342244][ T5835]        __x64_sys_mkdir+0x6c/0x80
[  105.348012][ T5835]        do_syscall_64+0xfa/0x3b0
[  105.353474][ T5835]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  105.360128][ T5835] 
[  105.360128][ T5835] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}:
[  105.370691][ T5835]        validate_chain+0xb9b/0x2140
[  105.376029][ T5835]        __lock_acquire+0xab9/0xd20
[  105.382008][ T5835]        lock_acquire+0x120/0x360
[  105.387523][ T5835]        down_write+0x96/0x1f0
[  105.393295][ T5835]        ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[  105.400979][ T5835]        ocfs2_reserve_clusters_with_limit+0x1be/0xba0
[  105.408827][ T5835]        ocfs2_init_xattr_set_ctxt+0x376/0x700
[  105.415222][ T5835]        ocfs2_xattr_set+0xb70/0x11f0
[  105.420786][ T5835]        __vfs_setxattr+0x439/0x480
[  105.425998][ T5835]        __vfs_setxattr_noperm+0x12d/0x660
[  105.431994][ T5835]        vfs_setxattr+0x16b/0x2f0
[  105.437206][ T5835]        ovl_get_workdir+0xbb7/0x1730
[  105.442618][ T5835]        ovl_fill_super+0x1386/0x35d0
[  105.448300][ T5835]        get_tree_nodev+0xb8/0x150
[  105.455357][ T5835]        vfs_get_tree+0x92/0x2b0
[  105.460586][ T5835]        do_new_mount+0x24a/0xa40
[  105.466009][ T5835]        __se_sys_mount+0x317/0x410
[  105.473267][ T5835]        do_syscall_64+0xfa/0x3b0
[  105.479030][ T5835]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  105.485670][ T5835] 
[  105.485670][ T5835] other info that might help us debug this:
[  105.485670][ T5835] 
[  105.496422][ T5835] Chain exists of:
[  105.496422][ T5835]   &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> jbd2_handle --> &oi->ip_xattr_sem
[  105.496422][ T5835] 
[  105.512729][ T5835]  Possible unsafe locking scenario:
[  105.512729][ T5835] 
[  105.520241][ T5835]        CPU0                    CPU1
[  105.525635][ T5835]        ----                    ----
[  105.531833][ T5835]   lock(&oi->ip_xattr_sem);
[  105.537411][ T5835]                                lock(jbd2_handle);
[  105.544585][ T5835]                                lock(&oi->ip_xattr_sem);
[  105.552528][ T5835]   lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
[  105.560038][ T5835] 
[  105.560038][ T5835]  *** DEADLOCK ***
[  105.560038][ T5835] 
[  105.568559][ T5835] 4 locks held by syz-executor279/5835:
[  105.574497][ T5835]  #0: ffff88802ff020e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970
[  105.584682][ T5835]  #1: ffff88807afbe428 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
[  105.594213][ T5835]  #2: ffff888074025100 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0
[  105.604784][ T5835]  #3: ffff888074024e38 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[  105.615025][ T5835] 
[  105.615025][ T5835] stack backtrace:
[  105.621107][ T5835] CPU: 0 UID: 0 PID: 5835 Comm: syz-executor279 Not tainted 6.16.0-rc1-syzkaller-00236-g8c6bc74c7f89 #0 PREEMPT(full) 
[  105.621128][ T5835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[  105.621137][ T5835] Call Trace:
[  105.621147][ T5835]  <TASK>
[  105.621154][ T5835]  dump_stack_lvl+0x189/0x250
[  105.621181][ T5835]  ? __pfx_dump_stack_lvl+0x10/0x10
[  105.621202][ T5835]  ? __pfx__printk+0x10/0x10
[  105.621217][ T5835]  ? print_lock_name+0xde/0x100
[  105.621240][ T5835]  print_circular_bug+0x2ee/0x310
[  105.621265][ T5835]  check_noncircular+0x134/0x160
[  105.621289][ T5835]  validate_chain+0xb9b/0x2140
[  105.621312][ T5835]  ? __mutex_unlock_slowpath+0x1cd/0x700
[  105.621337][ T5835]  ? __pfx___mutex_unlock_slowpath+0x10/0x10
[  105.621362][ T5835]  __lock_acquire+0xab9/0xd20
[  105.621382][ T5835]  ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[  105.621400][ T5835]  lock_acquire+0x120/0x360
[  105.621417][ T5835]  ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[  105.621435][ T5835]  ? is_bpf_text_address+0x26/0x2b0
[  105.621458][ T5835]  ? kernel_text_address+0xa5/0xe0
[  105.621477][ T5835]  down_write+0x96/0x1f0
[  105.621490][ T5835]  ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[  105.621507][ T5835]  ? __pfx_down_write+0x10/0x10
[  105.621523][ T5835]  ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[  105.621544][ T5835]  ? check_noncircular+0xe0/0x160
[  105.621567][ T5835]  ? lockdep_unlock+0x89/0x120
[  105.621582][ T5835]  ? validate_chain+0x897/0x2140
[  105.621603][ T5835]  ? __pfx_ocfs2_reserve_local_alloc_bits+0x10/0x10
[  105.621620][ T5835]  ? get_tree_nodev+0xb8/0x150
[  105.621641][ T5835]  ? __lock_acquire+0xab9/0xd20
[  105.621665][ T5835]  ? do_raw_spin_unlock+0x122/0x240
[  105.621680][ T5835]  ? _raw_spin_unlock+0x28/0x50
[  105.621698][ T5835]  ? ocfs2_alloc_should_use_local+0x152/0x310
[  105.621714][ T5835]  ? ocfs2_reserve_clusters_with_limit+0x16b/0xba0
[  105.621736][ T5835]  ocfs2_reserve_clusters_with_limit+0x1be/0xba0
[  105.621760][ T5835]  ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10
[  105.621784][ T5835]  ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10
[  105.621802][ T5835]  ? __lock_acquire+0xab9/0xd20
[  105.621823][ T5835]  ocfs2_init_xattr_set_ctxt+0x376/0x700
[  105.621839][ T5835]  ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10
[  105.621855][ T5835]  ? ocfs2_xattr_set+0xb36/0x11f0
[  105.621869][ T5835]  ? up_write+0x1c4/0x420
[  105.621880][ T5835]  ? ocfs2_xattr_set+0x334/0x11f0
[  105.621893][ T5835]  ocfs2_xattr_set+0xb70/0x11f0
[  105.621913][ T5835]  ? __pfx_ocfs2_xattr_set+0x10/0x10
[  105.621929][ T5835]  ? smack_log+0xef/0x3f0
[  105.621944][ T5835]  ? __pfx___console_unlock+0x10/0x10
[  105.621957][ T5835]  ? smk_access+0x14c/0x4e0
[  105.621972][ T5835]  ? smk_tskacc+0x2fc/0x370
[  105.621987][ T5835]  ? posix_xattr_acl+0x93/0xc0
[  105.622008][ T5835]  ? evm_protect_xattr+0x4d4/0xa90
[  105.622030][ T5835]  ? __pfx_evm_protect_xattr+0x10/0x10
[  105.622050][ T5835]  ? safesetid_security_capable+0xa9/0x1a0
[  105.622076][ T5835]  ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10
[  105.622090][ T5835]  __vfs_setxattr+0x439/0x480
[  105.622113][ T5835]  __vfs_setxattr_noperm+0x12d/0x660
[  105.622133][ T5835]  vfs_setxattr+0x16b/0x2f0
[  105.622154][ T5835]  ? __pfx_vfs_setxattr+0x10/0x10
[  105.622172][ T5835]  ? up_write+0x1c4/0x420
[  105.622186][ T5835]  ovl_get_workdir+0xbb7/0x1730
[  105.622210][ T5835]  ? __pfx_ovl_get_workdir+0x10/0x10
[  105.622239][ T5835]  ? do_raw_spin_unlock+0x122/0x240
[  105.622255][ T5835]  ? _raw_spin_unlock+0x28/0x50
[  105.622272][ T5835]  ? ovl_inuse_trylock+0xae/0xf0
[  105.622293][ T5835]  ovl_fill_super+0x1386/0x35d0
[  105.622318][ T5835]  ? rcu_is_watching+0x15/0xb0
[  105.622341][ T5835]  ? shrinker_register+0x124/0x230
[  105.622365][ T5835]  ? __pfx_ovl_fill_super+0x10/0x10
[  105.622385][ T5835]  ? __pfx___mutex_lock+0x10/0x10
[  105.622406][ T5835]  ? __pfx___mutex_unlock_slowpath+0x10/0x10
[  105.622430][ T5835]  ? __raw_spin_lock_init+0x45/0x100
[  105.622449][ T5835]  ? sget_fc+0x962/0xa40
[  105.622462][ T5835]  ? __pfx_set_anon_super_fc+0x10/0x10
[  105.622477][ T5835]  ? __pfx_ovl_fill_super+0x10/0x10
[  105.622498][ T5835]  get_tree_nodev+0xb8/0x150
[  105.622514][ T5835]  vfs_get_tree+0x92/0x2b0
[  105.622531][ T5835]  do_new_mount+0x24a/0xa40
[  105.622552][ T5835]  __se_sys_mount+0x317/0x410
[  105.622573][ T5835]  ? __pfx___se_sys_mount+0x10/0x10
[  105.622591][ T5835]  ? rcu_is_watching+0x15/0xb0
[  105.622613][ T5835]  ? __x64_sys_mount+0x20/0xc0
[  105.622632][ T5835]  do_syscall_64+0xfa/0x3b0
[  105.622654][ T5835]  ? lockdep_hardirqs_on+0x9c/0x150
[  105.622674][ T5835]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  105.622688][ T5835]  ? clear_bhb_loop+0x60/0xb0
[  105.622704][ T5835]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  105.622719][ T5835] RIP: 0033:0x7f1bcc81f599
[  105.622732][ T5835] 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
[  105.622745][ T5835] RSP: 002b:00007ffd13f33128 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  105.622772][ T5835] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1bcc81f599
[  105.622783][ T5835] RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000
[  105.622792][ T5835] RBP: 0000000000000000 R08: 0000200000000a00 R09: 00007ffd13f33160
[  105.622802][ T5835] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd13f33160
[pid  5835] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=24 /* 0.24 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=0x555567631750) = 5839
[pid  5839] set_robust_list(0x555567631760, 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
[  105.622811][ T5835] R13: 00007ffd13f333e8 R14: 431bde82d7b634db R15: 00007f1bcc86803b
[  105.622827][ T5835]  </TASK>
[  106.211354][ T5835] overlayfs: upper fs missing required features.
[pid  5839] close(3)                    = 0
[pid  5839] write(1, "executing program\n", 18executing program
) = 18
[pid  5839] memfd_create("syzkaller", 0) = 3
[pid  5839] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 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("./bus", 0777)        = 0
[pid  5839] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5839] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5839] mkdirat(AT_FDCWD, "./file0", 000) = 0
[pid  5839] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=2 /* 0.02 s */, si_stime=12 /* 0.12 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5840 attached
, child_tidptr=0x555567631750) = 5840
[pid  5840] set_robust_list(0x555567631760, 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
[pid  5840] write(1, "executing program\n", 18executing program
) = 18
[pid  5840] memfd_create("syzkaller", 0) = 3
[pid  5840] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[  106.411902][ T5839] overlayfs: workdir and upperdir must reside under the same mount
[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(0x7f1bc4200000, 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("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5840] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5840] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5840] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5840] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=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, child_tidptr=0x555567631750) = 5842
./strace-static-x86_64: Process 5842 attached
[pid  5842] set_robust_list(0x555567631760, 24) = 0
[pid  5842] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5842] setpgid(0, 0)               = 0
[pid  5842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5842] write(3, "1000", 4)         = 4
[pid  5842] close(3)                    = 0
executing program
[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) = 0x7f1bc4200000
[  106.655601][ T5840] overlayfs: workdir and upperdir must reside under the same mount
[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(0x7f1bc4200000, 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("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5842] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5842] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5842] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5842] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=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 5843 attached
[  106.858728][ T5842] overlayfs: workdir and upperdir must reside under the same mount
 <unfinished ...>
[pid  5843] set_robust_list(0x555567631760, 24 <unfinished ...>
[pid  5834] <... clone resumed>, child_tidptr=0x555567631750) = 5843
[pid  5843] <... set_robust_list resumed>) = 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) = 0x7f1bc4200000
[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(0x7f1bc4200000, 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("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5843] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5843] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5843] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5843] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=0, si_stime=15 /* 0.15 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[  107.191591][ T5843] overlayfs: workdir and upperdir must reside under the same mount
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 5845 attached
, child_tidptr=0x555567631750) = 5845
[pid  5845] set_robust_list(0x555567631760, 24) = 0
[pid  5845] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5845] setpgid(0, 0)               = 0
[pid  5845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5845] write(3, "1000", 4)         = 4
[pid  5845] close(3)                    = 0
executing program
[pid  5845] write(1, "executing program\n", 18) = 18
[pid  5845] memfd_create("syzkaller", 0) = 3
[pid  5845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 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("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5845] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5845] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5845] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5845] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=3 /* 0.03 s */, si_stime=12 /* 0.12 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[  107.507112][ T5845] overlayfs: workdir and upperdir must reside under the same mount
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=0x555567631750) = 5849
[pid  5849] set_robust_list(0x555567631760, 24) = 0
[pid  5849] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5849] setpgid(0, 0)               = 0
[pid  5849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5849] write(3, "1000", 4)         = 4
[pid  5849] close(3)                    = 0
[pid  5849] write(1, "executing program\n", 18executing program
) = 18
[pid  5849] memfd_create("syzkaller", 0) = 3
[pid  5849] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 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("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5849] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5849] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5849] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5849] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=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 5850 attached
, child_tidptr=0x555567631750) = 5850
[pid  5850] set_robust_list(0x555567631760, 24) = 0
[  107.835852][ T5849] overlayfs: workdir and upperdir must reside under the same mount
[pid  5850] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5850] setpgid(0, 0)               = 0
[pid  5850] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5850] write(3, "1000", 4)         = 4
[pid  5850] close(3)                    = 0
executing program
[pid  5850] write(1, "executing program\n", 18) = 18
[pid  5850] memfd_create("syzkaller", 0) = 3
[pid  5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 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("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5850] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5850] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5850] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5850] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=10 /* 0.10 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[  108.134028][ T5850] overlayfs: workdir and upperdir must reside under the same mount
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=0x555567631750) = 5851
[pid  5851] set_robust_list(0x555567631760, 24) = 0
[pid  5851] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5851] setpgid(0, 0)               = 0
[pid  5851] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5851] write(3, "1000", 4)         = 4
[pid  5851] close(3)                    = 0
executing program
[pid  5851] write(1, "executing program\n", 18) = 18
[pid  5851] memfd_create("syzkaller", 0) = 3
[pid  5851] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 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("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5851] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5851] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5851] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5851] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=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 5852 attached
, child_tidptr=0x555567631750) = 5852
[  108.452036][ T5851] overlayfs: workdir and upperdir must reside under the same mount
[pid  5852] set_robust_list(0x555567631760, 24) = 0
[pid  5852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5852] setpgid(0, 0)               = 0
[pid  5852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5852] write(3, "1000", 4)         = 4
[pid  5852] close(3)                    = 0
[pid  5852] write(1, "executing program\n", 18executing program
) = 18
[pid  5852] memfd_create("syzkaller", 0) = 3
[pid  5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 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("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5852] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5852] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5852] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5852] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[  108.749194][ T5852] overlayfs: workdir and upperdir must reside under the same mount
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5853 attached
, child_tidptr=0x555567631750) = 5853
[pid  5853] set_robust_list(0x555567631760, 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) = 0x7f1bc4200000
[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(0x7f1bc4200000, 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("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5853] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5853] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5853] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5853] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=1 /* 0.01 s */, si_stime=14 /* 0.14 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[  109.069857][ T5853] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5854 attached
, child_tidptr=0x555567631750) = 5854
[pid  5854] set_robust_list(0x555567631760, 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
executing program
[pid  5854] close(3)                    = 0
[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) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5854] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5854] close(3)                    = 0
[pid  5854] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5854] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5854] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5854] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5854] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=0, 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 5855 attached
 <unfinished ...>
[pid  5855] set_robust_list(0x555567631760, 24 <unfinished ...>
[pid  5834] <... clone resumed>, child_tidptr=0x555567631750) = 5855
[pid  5855] <... set_robust_list resumed>) = 0
[  109.387693][ T5854] overlayfs: workdir and upperdir must reside under the same mount
[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
[pid  5855] write(1, "executing program\n", 18executing program
) = 18
[pid  5855] memfd_create("syzkaller", 0) = 3
[pid  5855] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5855] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5855] close(3)                    = 0
[pid  5855] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5855] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5855] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5855] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5855] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=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)
[  109.693244][ T5855] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5856 attached
, child_tidptr=0x555567631750) = 5856
[pid  5856] set_robust_list(0x555567631760, 24) = 0
[pid  5856] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5856] setpgid(0, 0)               = 0
[pid  5856] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5856] write(3, "1000", 4)         = 4
[pid  5856] close(3)                    = 0
executing program
[pid  5856] write(1, "executing program\n", 18) = 18
[pid  5856] memfd_create("syzkaller", 0) = 3
[pid  5856] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5856] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5856] close(3)                    = 0
[pid  5856] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5856] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5856] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5856] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5856] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=1 /* 0.01 s */, si_stime=12 /* 0.12 s */} ---
[  110.031706][ T5856] overlayfs: workdir and upperdir must reside under the same mount
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=0x555567631750) = 5857
[pid  5857] set_robust_list(0x555567631760, 24) = 0
[pid  5857] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5857] setpgid(0, 0)               = 0
[pid  5857] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5857] write(3, "1000", 4)         = 4
[pid  5857] close(3executing program
)                    = 0
[pid  5857] write(1, "executing program\n", 18) = 18
[pid  5857] memfd_create("syzkaller", 0) = 3
[pid  5857] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5857] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5857] close(3)                    = 0
[pid  5857] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5857] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5857] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5857] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5857] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=2 /* 0.02 s */, si_stime=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5859 attached
, child_tidptr=0x555567631750) = 5859
[pid  5859] set_robust_list(0x555567631760, 24) = 0
[  110.325823][ T5857] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5859] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5859] close(3)                    = 0
[pid  5859] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5859] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5859] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5859] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5859] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5859] exit_group(0)               = ?
[pid  5859] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5859, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=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 5860 attached
 <unfinished ...>
[pid  5860] set_robust_list(0x555567631760, 24 <unfinished ...>
[pid  5834] <... clone resumed>, child_tidptr=0x555567631750) = 5860
[pid  5860] <... set_robust_list resumed>) = 0
[pid  5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[  110.647857][ T5859] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5860] close(3)                    = 0
[pid  5860] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5860] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5860] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5860] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5860] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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 */} ---
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 5861 attached
[  110.928736][ T5860] overlayfs: workdir and upperdir must reside under the same mount
 <unfinished ...>
[pid  5861] set_robust_list(0x555567631760, 24 <unfinished ...>
[pid  5834] <... clone resumed>, child_tidptr=0x555567631750) = 5861
[pid  5861] <... set_robust_list resumed>) = 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) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5861] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5861] close(3)                    = 0
[pid  5861] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5861] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5861] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5861] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5861] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=0x555567631750) = 5862
[pid  5862] set_robust_list(0x555567631760, 24) = 0
[pid  5862] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5862] setpgid(0, 0)               = 0
[  111.206604][ T5861] overlayfs: workdir and upperdir must reside under the same mount
[pid  5862] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5862] write(3, "1000", 4)         = 4
[pid  5862] close(3)                    = 0
executing program
[pid  5862] write(1, "executing program\n", 18) = 18
[pid  5862] memfd_create("syzkaller", 0) = 3
[pid  5862] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5862] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5862] close(3)                    = 0
[pid  5862] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5862] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5862] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5862] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5862] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=11 /* 0.11 s */} ---
[  111.537937][ T5862] overlayfs: workdir and upperdir must reside under the same mount
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5863 attached
, child_tidptr=0x555567631750) = 5863
[pid  5863] set_robust_list(0x555567631760, 24) = 0
[pid  5863] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5863] setpgid(0, 0)               = 0
[pid  5863] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5863] write(3, "1000", 4)         = 4
[pid  5863] close(3)                    = 0
executing program
[pid  5863] write(1, "executing program\n", 18) = 18
[pid  5863] memfd_create("syzkaller", 0) = 3
[pid  5863] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[pid  5863] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5863] munmap(0x7f1bc4200000, 138412032) = 0
[pid  5863] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5863] close(3)                    = 0
[pid  5863] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5863] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5863] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5863] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5863] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5863] exit_group(0)               = ?
[pid  5863] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5863, si_uid=0, si_status=0, si_utime=0, 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)
[  111.861536][ T5863] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555567631750) = 5864
./strace-static-x86_64: Process 5864 attached
[pid  5864] set_robust_list(0x555567631760, 24) = 0
[pid  5864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5864] setpgid(0, 0)               = 0
[pid  5864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5864] write(3, "1000", 4)         = 4
[pid  5864] close(3)                    = 0
[pid  5864] write(1, "executing program\n", 18executing program
) = 18
[pid  5864] memfd_create("syzkaller", 0) = 3
[pid  5864] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5864] close(3)                    = 0
[pid  5864] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5864] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5864] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5864] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5864] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=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 5865 attached
, child_tidptr=0x555567631750) = 5865
[  112.227293][ T5864] overlayfs: workdir and upperdir must reside under the same mount
[pid  5865] set_robust_list(0x555567631760, 24) = 0
[pid  5865] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5865] setpgid(0, 0)               = 0
[pid  5865] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5865] write(3, "1000", 4)         = 4
[pid  5865] close(3)                    = 0
executing program
[pid  5865] write(1, "executing program\n", 18) = 18
[pid  5865] memfd_create("syzkaller", 0) = 3
[pid  5865] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5865] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5865] close(3)                    = 0
[pid  5865] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5865] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5865] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5865] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5865] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=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 5866 attached
, child_tidptr=0x555567631750) = 5866
[  112.538805][ T5865] overlayfs: workdir and upperdir must reside under the same mount
[pid  5866] set_robust_list(0x555567631760, 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) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5866] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5866] close(3)                    = 0
[pid  5866] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5866] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5866] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5866] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5866] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=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)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5867 attached
, child_tidptr=0x555567631750) = 5867
[  112.891641][ T5866] overlayfs: workdir and upperdir must reside under the same mount
[pid  5867] set_robust_list(0x555567631760, 24) = 0
[pid  5867] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5867] setpgid(0, 0)               = 0
[pid  5867] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5867] write(3, "1000", 4)         = 4
[pid  5867] close(3)                    = 0
[pid  5867] write(1, "executing program\n", 18executing program
) = 18
[pid  5867] memfd_create("syzkaller", 0) = 3
[pid  5867] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5867] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5867] close(3)                    = 0
[pid  5867] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5867] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5867] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5867] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5867] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=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 5868 attached
 <unfinished ...>
[pid  5868] set_robust_list(0x555567631760, 24 <unfinished ...>
[pid  5834] <... clone resumed>, child_tidptr=0x555567631750) = 5868
[pid  5868] <... set_robust_list resumed>) = 0
[  113.221033][ T5867] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5868] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5868] close(3)                    = 0
[pid  5868] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5868] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5868] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5868] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5868] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=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)
[  113.544796][ T5868] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5870 attached
, child_tidptr=0x555567631750) = 5870
[pid  5870] set_robust_list(0x555567631760, 24) = 0
[pid  5870] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5870] setpgid(0, 0)               = 0
[pid  5870] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5870] write(3, "1000", 4)         = 4
[pid  5870] close(3)                    = 0
executing program
[pid  5870] write(1, "executing program\n", 18) = 18
[pid  5870] memfd_create("syzkaller", 0) = 3
[pid  5870] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5870] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5870] close(3)                    = 0
[pid  5870] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5870] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5870] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5870] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5870] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=1 /* 0.01 s */, si_stime=11 /* 0.11 s */} ---
[  113.871933][ T5870] overlayfs: workdir and upperdir must reside under the same mount
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5871 attached
, child_tidptr=0x555567631750) = 5871
[pid  5871] set_robust_list(0x555567631760, 24) = 0
[pid  5871] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5871] setpgid(0, 0)               = 0
[pid  5871] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5871] write(3, "1000", 4)         = 4
[pid  5871] close(3)                    = 0
executing program
[pid  5871] write(1, "executing program\n", 18) = 18
[pid  5871] memfd_create("syzkaller", 0) = 3
[pid  5871] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5871] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5871] close(3)                    = 0
[pid  5871] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5871] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5871] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5871] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5871] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=0, 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 5872 attached
, child_tidptr=0x555567631750) = 5872
[pid  5872] set_robust_list(0x555567631760, 24) = 0
[pid  5872] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[  114.206186][ T5871] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5872] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5872] close(3)                    = 0
[pid  5872] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5872] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5872] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5872] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5872] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[  114.500566][ T5872] overlayfs: workdir and upperdir must reside under the same mount
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=0x555567631750) = 5873
[pid  5873] set_robust_list(0x555567631760, 24) = 0
[pid  5873] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5873] setpgid(0, 0)               = 0
[pid  5873] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5873] write(3, "1000", 4)         = 4
[pid  5873] close(3)                    = 0
executing program
[pid  5873] write(1, "executing program\n", 18) = 18
[pid  5873] memfd_create("syzkaller", 0) = 3
[pid  5873] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bc4200000
[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(0x7f1bc4200000, 138412032) = 0
[pid  5873] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5873] close(3)                    = 0
[pid  5873] mkdir("./bus", 0777)        = -1 EEXIST (File exists)
[pid  5873] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} ---
[pid  5873] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5873] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5873] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5873] exit_group(0)               = ?
[pid  5873] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5873, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=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 5874 attached
, child_tidptr=0x555567631750) = 5874
[  114.873421][ T5873] overlayfs: workdir and upperdir must reside under the same mount
[pid  5874] set_robust_list(0x555567631760, 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) = 0x7f1bc4200000