./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2088254617

<...>
Warning: Permanently added '10.128.1.252' (ED25519) to the list of known hosts.
execve("./syz-executor2088254617", ["./syz-executor2088254617"], 0x7ffccce4dbd0 /* 10 vars */) = 0
brk(NULL)                               = 0x555571baf000
brk(0x555571bafd00)                     = 0x555571bafd00
arch_prctl(ARCH_SET_FS, 0x555571baf380) = 0
set_tid_address(0x555571baf650)         = 5839
set_robust_list(0x555571baf660, 24)     = 0
rseq(0x555571bafca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor2088254617", 4096) = 28
getrandom("\x3d\x43\xcc\x20\xaa\x32\xb4\xf6", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555571bafd00
brk(0x555571bd0d00)                     = 0x555571bd0d00
brk(0x555571bd1000)                     = 0x555571bd1000
mprotect(0x7f20181f6000, 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
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 3
ioctl(3, LOOP_CLR_FD)                   = -1 ENXIO (No such device or address)
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5841 attached
 <unfinished ...>
[pid  5841] set_robust_list(0x555571baf660, 24 <unfinished ...>
[pid  5839] <... clone resumed>, child_tidptr=0x555571baf650) = 5841
[pid  5841] <... set_robust_list resumed>) = 0
[pid  5841] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5841] setpgid(0, 0)               = 0
[pid  5841] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5841] write(3, "1000", 4)         = 4
[pid  5841] close(3)                    = 0
executing program
[pid  5841] write(1, "executing program\n", 18) = 18
[pid  5841] memfd_create("syzkaller", 0) = 3
[pid  5841] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[pid  5841] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5841] munmap(0x7f200fc00000, 138412032) = 0
[pid  5841] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5841] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5841] close(3)                    = 0
[pid  5841] close(4)                    = 0
[pid  5841] mkdir("./file1", 0777)      = 0
[   90.646492][ T5841] loop0: detected capacity change from 0 to 32768
[   90.668172][ T5841] =======================================================
[   90.668172][ T5841] WARNING: The mand mount option has been deprecated and
[   90.668172][ T5841]          and is ignored by this kernel. Remove the mand
[   90.668172][ T5841]          option from the mount to silence this warning.
[pid  5841] mount("/dev/loop0", "./file1", "ocfs2", MS_MANDLOCK|MS_DIRSYNC|MS_NODIRATIME, "acl,heartbeat=none,errors=remount-ro,coherency=full,coherency=full,localflocks,intr,noacl,") = 0
[pid  5841] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid  5841] chdir("./file1")            = 0
[pid  5841] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5841] mkdirat(AT_FDCWD, "./bus", 010) = 0
[pid  5841] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5841] mkdirat(AT_FDCWD, "./file1", 000) = 0
[pid  5841] mkdirat(AT_FDCWD, "./file1/file0", 000) = 0
[   90.668172][ T5841] =======================================================
[   90.737672][ T5841] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
[   90.779438][ T5841] overlayfs: upper fs does not support tmpfile.
[   90.788728][ T5841] overlayfs: upper fs does not support RENAME_WHITEOUT.
[   90.796250][ T5841] 
[   90.798598][ T5841] ======================================================
[   90.805628][ T5841] WARNING: possible circular locking dependency detected
[   90.812672][ T5841] 6.16.0-rc4-syzkaller-00324-g1f988d0788f5 #0 Not tainted
[   90.819868][ T5841] ------------------------------------------------------
[   90.826893][ T5841] syz-executor208/5841 is trying to acquire lock:
[   90.833314][ T5841] ffff888079142640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   90.846861][ T5841] 
[   90.846861][ T5841] but task is already holding lock:
[   90.854251][ T5841] ffff888079146ab8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[   90.863781][ T5841] 
[   90.863781][ T5841] which lock already depends on the new lock.
[   90.863781][ T5841] 
[   90.874373][ T5841] 
[   90.874373][ T5841] the existing dependency chain (in reverse order) is:
[   90.883411][ T5841] 
[   90.883411][ T5841] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}:
[   90.891273][ T5841]        lock_acquire+0x120/0x360
[   90.896316][ T5841]        down_write+0x96/0x1f0
[   90.901115][ T5841]        ocfs2_xattr_set_handle+0x3b0/0x7a0
[   90.907031][ T5841]        ocfs2_init_security_set+0xbd/0xe0
[   90.912860][ T5841]        ocfs2_mknod+0x137f/0x2050
[   90.917993][ T5841]        ocfs2_mkdir+0x191/0x440
[   90.922962][ T5841]        vfs_mkdir+0x303/0x510
[   90.927765][ T5841]        do_mkdirat+0x247/0x590
[   90.932661][ T5841]        __x64_sys_mkdirat+0x87/0xa0
[   90.937985][ T5841]        do_syscall_64+0xfa/0x3b0
[   90.943028][ T5841]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   90.949458][ T5841] 
[   90.949458][ T5841] -> #3 (jbd2_handle){.+.+}-{0:0}:
[   90.956778][ T5841]        lock_acquire+0x120/0x360
[   90.961818][ T5841]        start_this_handle+0x1fa7/0x21c0
[   90.967466][ T5841]        jbd2__journal_start+0x2c1/0x5b0
[   90.973114][ T5841]        jbd2_journal_start+0x2a/0x40
[   90.978503][ T5841]        ocfs2_start_trans+0x376/0x6d0
[   90.983983][ T5841]        ocfs2_reserve_suballoc_bits+0x711/0x4640
[   90.990404][ T5841]        ocfs2_reserve_new_metadata_blocks+0x403/0x940
[   90.997264][ T5841]        ocfs2_mknod+0xe08/0x2050
[   91.002306][ T5841]        ocfs2_mkdir+0x191/0x440
[   91.007335][ T5841]        vfs_mkdir+0x303/0x510
[   91.012208][ T5841]        do_mkdirat+0x247/0x590
[   91.017073][ T5841]        __x64_sys_mkdirat+0x87/0xa0
[   91.022375][ T5841]        do_syscall_64+0xfa/0x3b0
[   91.027417][ T5841]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.033841][ T5841] 
[   91.033841][ T5841] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
[   91.042375][ T5841]        lock_acquire+0x120/0x360
[   91.047407][ T5841]        down_read+0x46/0x2e0
[   91.052096][ T5841]        ocfs2_start_trans+0x36a/0x6d0
[   91.057570][ T5841]        ocfs2_reserve_suballoc_bits+0x711/0x4640
[   91.064018][ T5841]        ocfs2_reserve_new_metadata_blocks+0x403/0x940
[   91.070916][ T5841]        ocfs2_mknod+0xe08/0x2050
[   91.075969][ T5841]        ocfs2_mkdir+0x191/0x440
[   91.080928][ T5841]        vfs_mkdir+0x303/0x510
[   91.085709][ T5841]        do_mkdirat+0x247/0x590
[   91.090572][ T5841]        __x64_sys_mkdirat+0x87/0xa0
[   91.095962][ T5841]        do_syscall_64+0xfa/0x3b0
[   91.101000][ T5841]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.107420][ T5841] 
[   91.107420][ T5841] -> #1 (sb_internal#2){.+.+}-{0:0}:
[   91.114914][ T5841]        lock_acquire+0x120/0x360
[   91.119941][ T5841]        ocfs2_start_trans+0x26b/0x6d0
[   91.125407][ T5841]        ocfs2_mknod+0xe93/0x2050
[   91.130452][ T5841]        ocfs2_mkdir+0x191/0x440
[   91.135412][ T5841]        vfs_mkdir+0x303/0x510
[   91.140188][ T5841]        do_mkdirat+0x247/0x590
[   91.145052][ T5841]        __x64_sys_mkdirat+0x87/0xa0
[   91.150351][ T5841]        do_syscall_64+0xfa/0x3b0
[   91.155395][ T5841]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.161826][ T5841] 
[   91.161826][ T5841] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}:
[   91.172355][ T5841]        validate_chain+0xb9b/0x2140
[   91.177651][ T5841]        __lock_acquire+0xab9/0xd20
[   91.182856][ T5841]        lock_acquire+0x120/0x360
[   91.187886][ T5841]        down_write+0x96/0x1f0
[   91.192661][ T5841]        ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   91.199452][ T5841]        ocfs2_reserve_clusters_with_limit+0x1be/0xba0
[   91.206310][ T5841]        ocfs2_init_xattr_set_ctxt+0x376/0x700
[   91.212475][ T5841]        ocfs2_xattr_set+0xb70/0x11f0
[   91.217865][ T5841]        __vfs_setxattr+0x439/0x480
[   91.223076][ T5841]        __vfs_setxattr_noperm+0x12d/0x660
[   91.228891][ T5841]        vfs_setxattr+0x16b/0x2f0
[   91.234023][ T5841]        ovl_get_workdir+0xbb7/0x1730
[   91.239413][ T5841]        ovl_fill_super+0x1386/0x35d0
[   91.244896][ T5841]        get_tree_nodev+0xbb/0x150
[   91.250021][ T5841]        vfs_get_tree+0x8f/0x2b0
[   91.254986][ T5841]        do_new_mount+0x24a/0xa40
[   91.260045][ T5841]        __se_sys_mount+0x317/0x410
[   91.265247][ T5841]        do_syscall_64+0xfa/0x3b0
[   91.270274][ T5841]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.276710][ T5841] 
[   91.276710][ T5841] other info that might help us debug this:
[   91.276710][ T5841] 
[   91.286945][ T5841] Chain exists of:
[   91.286945][ T5841]   &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> jbd2_handle --> &oi->ip_xattr_sem
[   91.286945][ T5841] 
[   91.302799][ T5841]  Possible unsafe locking scenario:
[   91.302799][ T5841] 
[   91.310255][ T5841]        CPU0                    CPU1
[   91.315624][ T5841]        ----                    ----
[   91.320993][ T5841]   lock(&oi->ip_xattr_sem);
[   91.325599][ T5841]                                lock(jbd2_handle);
[   91.332196][ T5841]                                lock(&oi->ip_xattr_sem);
[   91.339507][ T5841]   lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
[   91.346805][ T5841] 
[   91.346805][ T5841]  *** DEADLOCK ***
[   91.346805][ T5841] 
[   91.355159][ T5841] 4 locks held by syz-executor208/5841:
[   91.360732][ T5841]  #0: ffff88807e4280e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970
[   91.370861][ T5841]  #1: ffff8880690f2428 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
[   91.380023][ T5841]  #2: ffff888079146d80 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0
[   91.390495][ T5841]  #3: ffff888079146ab8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[   91.400440][ T5841] 
[   91.400440][ T5841] stack backtrace:
[   91.406450][ T5841] CPU: 0 UID: 0 PID: 5841 Comm: syz-executor208 Not tainted 6.16.0-rc4-syzkaller-00324-g1f988d0788f5 #0 PREEMPT(full) 
[   91.406470][ T5841] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[   91.406487][ T5841] Call Trace:
[   91.406499][ T5841]  <TASK>
[   91.406507][ T5841]  dump_stack_lvl+0x189/0x250
[   91.406529][ T5841]  ? __pfx_dump_stack_lvl+0x10/0x10
[   91.406546][ T5841]  ? __pfx__printk+0x10/0x10
[   91.406568][ T5841]  ? print_lock_name+0xde/0x100
[   91.406588][ T5841]  print_circular_bug+0x2ee/0x310
[   91.406611][ T5841]  check_noncircular+0x134/0x160
[   91.406633][ T5841]  validate_chain+0xb9b/0x2140
[   91.406652][ T5841]  ? __mutex_unlock_slowpath+0x1cd/0x700
[   91.406671][ T5841]  ? __pfx___mutex_unlock_slowpath+0x10/0x10
[   91.406690][ T5841]  __lock_acquire+0xab9/0xd20
[   91.406708][ T5841]  ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   91.406733][ T5841]  lock_acquire+0x120/0x360
[   91.406747][ T5841]  ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   91.406778][ T5841]  ? is_bpf_text_address+0x26/0x2b0
[   91.406797][ T5841]  ? kernel_text_address+0xa5/0xe0
[   91.406823][ T5841]  down_write+0x96/0x1f0
[   91.406839][ T5841]  ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   91.406864][ T5841]  ? __pfx_down_write+0x10/0x10
[   91.406885][ T5841]  ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   91.406914][ T5841]  ? check_noncircular+0xe0/0x160
[   91.406934][ T5841]  ? lockdep_unlock+0x89/0x120
[   91.406958][ T5841]  ? validate_chain+0x897/0x2140
[   91.406976][ T5841]  ? __pfx_ocfs2_reserve_local_alloc_bits+0x10/0x10
[   91.407000][ T5841]  ? get_tree_nodev+0xbb/0x150
[   91.407031][ T5841]  ? __lock_acquire+0xab9/0xd20
[   91.407053][ T5841]  ? do_raw_spin_unlock+0x122/0x240
[   91.407075][ T5841]  ? _raw_spin_unlock+0x28/0x50
[   91.407097][ T5841]  ? ocfs2_alloc_should_use_local+0x152/0x310
[   91.407121][ T5841]  ? ocfs2_reserve_clusters_with_limit+0x16b/0xba0
[   91.407140][ T5841]  ocfs2_reserve_clusters_with_limit+0x1be/0xba0
[   91.407162][ T5841]  ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10
[   91.407184][ T5841]  ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10
[   91.407210][ T5841]  ? __lock_acquire+0xab9/0xd20
[   91.407228][ T5841]  ocfs2_init_xattr_set_ctxt+0x376/0x700
[   91.407251][ T5841]  ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10
[   91.407274][ T5841]  ? ocfs2_xattr_set+0xb36/0x11f0
[   91.407295][ T5841]  ? up_write+0x1c4/0x420
[   91.407313][ T5841]  ? ocfs2_xattr_set+0x334/0x11f0
[   91.407333][ T5841]  ocfs2_xattr_set+0xb70/0x11f0
[   91.407361][ T5841]  ? __pfx_ocfs2_xattr_set+0x10/0x10
[   91.407381][ T5841]  ? up+0xde/0x150
[   91.407398][ T5841]  ? smack_log+0xef/0x3f0
[   91.407419][ T5841]  ? __pfx___console_unlock+0x10/0x10
[   91.407439][ T5841]  ? smk_access+0x14c/0x4e0
[   91.407460][ T5841]  ? smk_tskacc+0x2fc/0x370
[   91.407481][ T5841]  ? posix_xattr_acl+0x93/0xc0
[   91.407499][ T5841]  ? evm_protect_xattr+0x4d4/0xa90
[   91.407518][ T5841]  ? __pfx_evm_protect_xattr+0x10/0x10
[   91.407533][ T5841]  ? safesetid_security_capable+0xa9/0x1a0
[   91.407558][ T5841]  ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10
[   91.407579][ T5841]  __vfs_setxattr+0x439/0x480
[   91.407598][ T5841]  __vfs_setxattr_noperm+0x12d/0x660
[   91.407616][ T5841]  vfs_setxattr+0x16b/0x2f0
[   91.407633][ T5841]  ? __pfx_vfs_setxattr+0x10/0x10
[   91.407648][ T5841]  ? up_write+0x1c4/0x420
[   91.407669][ T5841]  ovl_get_workdir+0xbb7/0x1730
[   91.407691][ T5841]  ? __pfx_ovl_get_workdir+0x10/0x10
[   91.407719][ T5841]  ? do_raw_spin_unlock+0x122/0x240
[   91.407741][ T5841]  ? _raw_spin_unlock+0x28/0x50
[   91.407763][ T5841]  ? ovl_inuse_trylock+0xae/0xf0
[   91.407794][ T5841]  ovl_fill_super+0x1386/0x35d0
[   91.407816][ T5841]  ? rcu_is_watching+0x15/0xb0
[   91.407837][ T5841]  ? shrinker_register+0x124/0x230
[   91.407858][ T5841]  ? __pfx_ovl_fill_super+0x10/0x10
[   91.407875][ T5841]  ? __pfx___mutex_lock+0x10/0x10
[   91.407891][ T5841]  ? __pfx___mutex_unlock_slowpath+0x10/0x10
[   91.407909][ T5841]  ? __raw_spin_lock_init+0x45/0x100
[   91.407935][ T5841]  ? sget_fc+0x962/0xa40
[   91.407956][ T5841]  ? __pfx_set_anon_super_fc+0x10/0x10
[   91.407977][ T5841]  ? __pfx_ovl_fill_super+0x10/0x10
[   91.407994][ T5841]  get_tree_nodev+0xbb/0x150
[   91.408017][ T5841]  vfs_get_tree+0x8f/0x2b0
[   91.408043][ T5841]  do_new_mount+0x24a/0xa40
[   91.408061][ T5841]  __se_sys_mount+0x317/0x410
[   91.408078][ T5841]  ? __pfx___se_sys_mount+0x10/0x10
[   91.408093][ T5841]  ? rcu_is_watching+0x15/0xb0
[   91.408112][ T5841]  ? __x64_sys_mount+0x20/0xc0
[   91.408128][ T5841]  do_syscall_64+0xfa/0x3b0
[   91.408143][ T5841]  ? lockdep_hardirqs_on+0x9c/0x150
[   91.408167][ T5841]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.408184][ T5841]  ? clear_bhb_loop+0x60/0xb0
[   91.408201][ T5841]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.408217][ T5841] RIP: 0033:0x7f201817ec19
[   91.408236][ T5841] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[   91.408250][ T5841] RSP: 002b:00007fff031bd0d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   91.408267][ T5841] RAX: ffffffffffffffda RBX: 2f31656c69662f2e RCX: 00007f201817ec19
[   91.408279][ T5841] RDX: 0000200000000000 RSI: 00002000000000c0 RDI: 0000000000000000
[   91.408290][ T5841] RBP: 0031656c69662f2e R08: 00002000000002c0 R09: 0000555571bb04c0
[   91.408302][ T5841] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff031bd100
[   91.408312][ T5841] R13: 00007fff031bd328 R14: 431bde82d7b634db R15: 00007f20181c703b
[pid  5841] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5841] exit_group(0)               = ?
[pid  5841] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5841, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=24 /* 0.24 s */} ---
[   91.408330][ T5841]  </TASK>
[   91.940303][ T1210] cfg80211: failed to load regulatory.db
[   91.947083][ T5841] overlayfs: upper fs missing required features.
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
 <unfinished ...>
[pid  5845] set_robust_list(0x555571baf660, 24) = 0
[pid  5845] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
executing program
[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", 18) = 18
[pid  5845] memfd_create("syzkaller", 0) = 3
[pid  5845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[pid  5839] <... clone resumed>, child_tidptr=0x555571baf650) = 5845
[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(0x7f200fc00000, 138412032) = 0
[pid  5845] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5845] close(3)                    = 0
[pid  5845] mkdirat(AT_FDCWD, "./bus", 010) = 0
[pid  5845] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5845] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5845] mkdirat(AT_FDCWD, "./file1/file0", 000) = 0
[pid  5845] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=4 /* 0.04 s */, si_stime=12 /* 0.12 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   92.181872][ 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 5846 attached
, child_tidptr=0x555571baf650) = 5846
[pid  5846] set_robust_list(0x555571baf660, 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) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5846] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5846] close(3)                    = 0
[pid  5846] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5846] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5846] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5846] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5846] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/file0,upperdir=./file1,") = -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=4 /* 0.04 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 5847 attached
, child_tidptr=0x555571baf650) = 5847
[pid  5847] set_robust_list(0x555571baf660, 24) = 0
[   92.455842][ T5846] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5847] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5847] close(3)                    = 0
[pid  5847] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5847] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5847] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5847] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5847] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/file0,upperdir=./file1,") = -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=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 5848 attached
, child_tidptr=0x555571baf650) = 5848
[pid  5848] set_robust_list(0x555571baf660, 24) = 0
[pid  5848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   92.792885][ T5847] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5848] close(3)                    = 0
[pid  5848] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5848] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5848] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5848] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5848] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/file0,upperdir=./file1,") = -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=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)
[   93.097405][ T5848] 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 5850 attached
, child_tidptr=0x555571baf650) = 5850
[pid  5850] set_robust_list(0x555571baf660, 24) = 0
[pid  5850] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5850] setpgid(0, 0)               = 0
[pid  5850] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5850] write(3, "1000", 4)         = 4
[pid  5850] close(3)                    = 0
executing program
[pid  5850] write(1, "executing program\n", 18) = 18
[pid  5850] memfd_create("syzkaller", 0) = 3
[pid  5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5850] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5850] close(3)                    = 0
[pid  5850] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5850] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5850] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5850] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5850] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=1 /* 0.01 s */, si_stime=14 /* 0.14 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   93.428424][ T5850] 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 5851 attached
, child_tidptr=0x555571baf650) = 5851
[pid  5851] set_robust_list(0x555571baf660, 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) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5851] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5851] close(3)                    = 0
[pid  5851] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5851] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5851] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5851] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5851] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=4 /* 0.04 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, child_tidptr=0x555571baf650) = 5854
./strace-static-x86_64: Process 5854 attached
[   93.751200][ T5851] overlayfs: workdir and upperdir must reside under the same mount
[pid  5854] set_robust_list(0x555571baf660, 24) = 0
[pid  5854] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5854] setpgid(0, 0)               = 0
[pid  5854] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5854] write(3, "1000", 4)         = 4
[pid  5854] close(3)                    = 0
[pid  5854] write(1, "executing program\n", 18executing program
) = 18
[pid  5854] memfd_create("syzkaller", 0) = 3
[pid  5854] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5854] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5854] close(3)                    = 0
[pid  5854] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5854] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5854] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5854] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5854] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=5 /* 0.05 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 5857 attached
, child_tidptr=0x555571baf650) = 5857
[   94.140576][ T5854] overlayfs: workdir and upperdir must reside under the same mount
[pid  5857] set_robust_list(0x555571baf660, 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(3)                    = 0
executing program
[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) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5857] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5857] close(3)                    = 0
[pid  5857] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5857] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5857] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5857] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5857] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=4 /* 0.04 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, child_tidptr=0x555571baf650) = 5858
./strace-static-x86_64: Process 5858 attached
[pid  5858] set_robust_list(0x555571baf660, 24) = 0
[pid  5858] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5858] setpgid(0, 0)               = 0
[pid  5858] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5858] write(3, "1000", 4)         = 4
[pid  5858] close(3)                    = 0
[pid  5858] write(1, "executing program\n", 18executing program
) = 18
[pid  5858] memfd_create("syzkaller", 0) = 3
[pid  5858] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[   94.479864][ T5857] overlayfs: workdir and upperdir must reside under the same mount
[pid  5858] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5858] munmap(0x7f200fc00000, 138412032) = 0
[pid  5858] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5858] close(3)                    = 0
[pid  5858] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5858] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5858] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5858] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5858] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5858] exit_group(0)               = ?
[pid  5858] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5858, si_uid=0, si_status=0, si_utime=4 /* 0.04 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 5859 attached
, child_tidptr=0x555571baf650) = 5859
[   94.734778][ T5858] overlayfs: workdir and upperdir must reside under the same mount
[pid  5859] set_robust_list(0x555571baf660, 24) = 0
[pid  5859] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5859] setpgid(0, 0)               = 0
[pid  5859] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5859] write(3, "1000", 4)         = 4
[pid  5859] close(3)                    = 0
[pid  5859] write(1, "executing program\n", 18executing program
) = 18
[pid  5859] memfd_create("syzkaller", 0) = 3
[pid  5859] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5859] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5859] close(3)                    = 0
[pid  5859] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5859] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5859] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5859] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5859] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=15 /* 0.15 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 5860 attached
, child_tidptr=0x555571baf650) = 5860
[pid  5860] set_robust_list(0x555571baf660, 24) = 0
[pid  5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5860] setpgid(0, 0)               = 0
[   95.053006][ T5859] overlayfs: workdir and upperdir must reside under the same mount
[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(3executing program
)                    = 0
[pid  5860] write(1, "executing program\n", 18) = 18
[pid  5860] memfd_create("syzkaller", 0) = 3
[pid  5860] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5860] close(3)                    = 0
[pid  5860] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5860] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5860] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5860] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5860] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=2 /* 0.02 s */, si_stime=13 /* 0.13 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555571baf650) = 5862
./strace-static-x86_64: Process 5862 attached
[pid  5862] set_robust_list(0x555571baf660, 24) = 0
[pid  5862] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5862] setpgid(0, 0)               = 0
[   95.348019][ T5860] 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) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5862] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5862] close(3)                    = 0
[pid  5862] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5862] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5862] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5862] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5862] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=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 5863 attached
, child_tidptr=0x555571baf650) = 5863
[   95.632052][ T5862] overlayfs: workdir and upperdir must reside under the same mount
[pid  5863] set_robust_list(0x555571baf660, 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) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5863] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5863] close(3)                    = 0
[pid  5863] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5863] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5863] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5863] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5863] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=16 /* 0.16 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   95.995572][ T5863] 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 5864 attached
, child_tidptr=0x555571baf650) = 5864
[pid  5864] set_robust_list(0x555571baf660, 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) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5864] close(3)                    = 0
[pid  5864] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5864] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5864] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5864] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5864] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=4 /* 0.04 s */, si_stime=12 /* 0.12 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   96.378358][ T5864] 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 5865 attached
, child_tidptr=0x555571baf650) = 5865
[pid  5865] set_robust_list(0x555571baf660, 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(3executing program
)                    = 0
[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) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5865] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5865] close(3)                    = 0
[pid  5865] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5865] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5865] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5865] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5865] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=13 /* 0.13 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5866 attached
, child_tidptr=0x555571baf650) = 5866
[pid  5866] set_robust_list(0x555571baf660, 24) = 0
[pid  5866] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   96.749605][ T5865] overlayfs: workdir and upperdir must reside under the same mount
[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
[pid  5866] write(1, "executing program\n", 18executing program
) = 18
[pid  5866] memfd_create("syzkaller", 0) = 3
[pid  5866] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5866] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5866] close(3)                    = 0
[pid  5866] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5866] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5866] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5866] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5866] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=5 /* 0.05 s */, si_stime=12 /* 0.12 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   97.037590][ T5866] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555571baf650) = 5867
./strace-static-x86_64: Process 5867 attached
[pid  5867] set_robust_list(0x555571baf660, 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
executing program
[pid  5867] write(1, "executing program\n", 18) = 18
[pid  5867] memfd_create("syzkaller", 0) = 3
[pid  5867] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5867] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5867] close(3)                    = 0
[pid  5867] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5867] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5867] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5867] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5867] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=1 /* 0.01 s */, si_stime=15 /* 0.15 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5868 attached
 <unfinished ...>
[pid  5868] set_robust_list(0x555571baf660, 24 <unfinished ...>
[pid  5839] <... clone resumed>, child_tidptr=0x555571baf650) = 5868
[pid  5868] <... set_robust_list resumed>) = 0
[   97.441345][ 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
executing program
[pid  5868] write(1, "executing program\n", 18) = 18
[pid  5868] memfd_create("syzkaller", 0) = 3
[pid  5868] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5868] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5868] close(3)                    = 0
[pid  5868] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5868] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5868] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5868] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5868] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=4 /* 0.04 s */, si_stime=13 /* 0.13 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 5869 attached
, child_tidptr=0x555571baf650) = 5869
[   97.786500][ T5868] overlayfs: workdir and upperdir must reside under the same mount
[pid  5869] set_robust_list(0x555571baf660, 24) = 0
[pid  5869] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5869] setpgid(0, 0)               = 0
[pid  5869] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5869] write(3, "1000", 4)         = 4
[pid  5869] close(3)                    = 0
executing program
[pid  5869] write(1, "executing program\n", 18) = 18
[pid  5869] memfd_create("syzkaller", 0) = 3
[pid  5869] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[pid  5869] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5869] munmap(0x7f200fc00000, 138412032) = 0
[pid  5869] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5869] close(3)                    = 0
[pid  5869] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5869] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5869] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5869] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5869] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5869] exit_group(0)               = ?
[pid  5869] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5869, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=13 /* 0.13 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5870 attached
, child_tidptr=0x555571baf650) = 5870
[pid  5870] set_robust_list(0x555571baf660, 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
[   98.131239][ T5869] overlayfs: workdir and upperdir must reside under the same mount
[pid  5870] memfd_create("syzkaller", 0) = 3
[pid  5870] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5870] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5870] close(3)                    = 0
[pid  5870] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5870] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5870] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5870] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5870] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=16 /* 0.16 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 5872 attached
, child_tidptr=0x555571baf650) = 5872
[pid  5872] set_robust_list(0x555571baf660, 24) = 0
[pid  5872] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   98.458961][ T5870] 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
executing program
[pid  5872] write(1, "executing program\n", 18) = 18
[pid  5872] memfd_create("syzkaller", 0) = 3
[pid  5872] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5872] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5872] close(3)                    = 0
[pid  5872] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5872] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5872] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5872] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5872] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=0, si_stime=17 /* 0.17 s */} ---
[   98.854116][ 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=0x555571baf650) = 5873
[pid  5873] set_robust_list(0x555571baf660, 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) = 0x7f200fc00000
[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(0x7f200fc00000, 138412032) = 0
[pid  5873] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5873] close(3)                    = 0
[pid  5873] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5873] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5873] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5873] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5873] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/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=3 /* 0.03 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)
[   99.248530][ T5873] 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 5874 attached
, child_tidptr=0x555571baf650) = 5874
[pid  5874] set_robust_list(0x555571baf660, 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) = 0x7f200fc00000
[pid  5874] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5874] munmap(0x7f200fc00000, 138412032) = 0
[pid  5874] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5874] close(3)                    = 0
[pid  5874] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5874] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5874] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5874] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5874] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5874] exit_group(0)               = ?
[pid  5874] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5874, si_uid=0, si_status=0, si_utime=4 /* 0.04 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 5875 attached
, child_tidptr=0x555571baf650) = 5875
[   99.596290][ T5874] overlayfs: workdir and upperdir must reside under the same mount
[pid  5875] set_robust_list(0x555571baf660, 24) = 0
[pid  5875] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5875] setpgid(0, 0)               = 0
[pid  5875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5875] write(3, "1000", 4)         = 4
[pid  5875] close(3)                    = 0
[pid  5875] write(1, "executing program\n", 18executing program
) = 18
[pid  5875] memfd_create("syzkaller", 0) = 3
[pid  5875] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[pid  5875] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5875] munmap(0x7f200fc00000, 138412032) = 0
[pid  5875] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5875] close(3)                    = 0
[pid  5875] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5875] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5875] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5875] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5875] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5875] exit_group(0)               = ?
[pid  5875] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5875, si_uid=0, si_status=0, si_utime=3 /* 0.03 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 5876 attached
, child_tidptr=0x555571baf650) = 5876
[   99.931576][ T5875] overlayfs: workdir and upperdir must reside under the same mount
[pid  5876] set_robust_list(0x555571baf660, 24) = 0
[pid  5876] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5876] setpgid(0, 0)               = 0
[pid  5876] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5876] write(3, "1000", 4)         = 4
[pid  5876] close(3)                    = 0
[pid  5876] write(1, "executing program\n", 18executing program
) = 18
[pid  5876] memfd_create("syzkaller", 0) = 3
[pid  5876] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[pid  5876] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5876] munmap(0x7f200fc00000, 138412032) = 0
[pid  5876] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5876] close(3)                    = 0
[pid  5876] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5876] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5876] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5876] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5876] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5876] exit_group(0)               = ?
[pid  5876] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5876, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=12 /* 0.12 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[  100.309907][ T5876] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555571baf650) = 5877
./strace-static-x86_64: Process 5877 attached
[pid  5877] set_robust_list(0x555571baf660, 24) = 0
[pid  5877] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5877] setpgid(0, 0)               = 0
[pid  5877] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5877] write(3, "1000", 4)         = 4
[pid  5877] close(3)                    = 0
[pid  5877] write(1, "executing program\n", 18executing program
) = 18
[pid  5877] memfd_create("syzkaller", 0) = 3
[pid  5877] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000
[pid  5877] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5877] munmap(0x7f200fc00000, 138412032) = 0
[pid  5877] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5877] close(3)                    = 0
[pid  5877] mkdirat(AT_FDCWD, "./bus", 010) = -1 EEXIST (File exists)
[pid  5877] unlinkat(AT_FDCWD, NULL, 0) = -1 EFAULT (Bad address)
[pid  5877] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5877] mkdirat(AT_FDCWD, "./file1/file0", 000) = -1 EEXIST (File exists)
[pid  5877] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file1/file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5877] exit_group(0)               = ?
[pid  5877] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5877, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=15 /* 0.15 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 5878 attached
, child_tidptr=0x555571baf650) = 5878
[  100.702795][ T5877] overlayfs: workdir and upperdir must reside under the same mount
[pid  5878] set_robust_list(0x555571baf660, 24) = 0
[pid  5878] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5878] setpgid(0, 0)               = 0
[pid  5878] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5878] write(3, "1000", 4)         = 4
[pid  5878] close(3)                    = 0
[pid  5878] write(1, "executing program\n", 18executing program
) = 18
[pid  5878] memfd_create("syzkaller", 0) = 3
[pid  5878] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f200fc00000