./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4121748076

<...>
Warning: Permanently added '10.128.1.111' (ED25519) to the list of known hosts.
execve("./syz-executor4121748076", ["./syz-executor4121748076"], 0x7ffc615763f0 /* 10 vars */) = 0
brk(NULL)                               = 0x55556146b000
brk(0x55556146bd00)                     = 0x55556146bd00
arch_prctl(ARCH_SET_FS, 0x55556146b380) = 0
set_tid_address(0x55556146b650)         = 5827
set_robust_list(0x55556146b660, 24)     = 0
rseq(0x55556146bca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor4121748076", 4096) = 28
getrandom("\xb4\xce\x0d\xf8\xa3\xeb\x62\x6e", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55556146bd00
brk(0x55556148cd00)                     = 0x55556148cd00
brk(0x55556148d000)                     = 0x55556148d000
mprotect(0x7f5192394000, 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 5828 attached
 <unfinished ...>
[pid  5828] set_robust_list(0x55556146b660, 24 <unfinished ...>
[pid  5827] <... clone resumed>, child_tidptr=0x55556146b650) = 5828
[pid  5828] <... set_robust_list resumed>) = 0
[pid  5828] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5828] setpgid(0, 0)               = 0
[pid  5828] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5828] write(3, "1000", 4)         = 4
[pid  5828] close(3)                    = 0
[pid  5828] write(1, "executing program\n", 18executing program
) = 18
[pid  5828] memfd_create("syzkaller", 0) = 3
[pid  5828] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[pid  5828] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5828] munmap(0x7f5189e00000, 138412032) = 0
[pid  5828] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5828] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5828] close(3)                    = 0
[pid  5828] close(4)                    = 0
[pid  5828] mkdir("./file1", 0777)      = 0
[   95.203556][ T5828] loop0: detected capacity change from 0 to 32768
[   95.232132][ T5828] =======================================================
[   95.232132][ T5828] WARNING: The mand mount option has been deprecated and
[   95.232132][ T5828]          and is ignored by this kernel. Remove the mand
[   95.232132][ T5828]          option from the mount to silence this warning.
[   95.232132][ T5828] =======================================================
[   95.290035][ T5828] JBD2: Ignoring recovery information on journal
[pid  5828] mount("/dev/loop0", "./file1", "ocfs2", MS_MANDLOCK|MS_DIRSYNC|MS_NODIRATIME, "acl,heartbeat=none,dir_resv_level=00000000000000000003,resv_level=00000000000000000006,coherency=ful"...) = 0
[pid  5828] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid  5828] chdir("./file1")            = 0
[pid  5828] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5828] mkdirat(AT_FDCWD, "./file1", 000) = 0
[pid  5828] mkdirat(AT_FDCWD, "./file0", 000) = 0
[pid  5828] mkdir("./bus", 000)         = 0
[   95.336903][ T5828] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
[   95.393576][ T5828] overlayfs: upper fs does not support tmpfile.
[   95.404877][ T5828] overlayfs: upper fs does not support RENAME_WHITEOUT.
[   95.412612][ T5828] 
[   95.414978][ T5828] ======================================================
[   95.421997][ T5828] WARNING: possible circular locking dependency detected
[   95.429034][ T5828] 6.16.0-rc1-syzkaller-00005-g488ef3560196 #0 Not tainted
[   95.436146][ T5828] ------------------------------------------------------
[   95.443167][ T5828] syz-executor412/5828 is trying to acquire lock:
[   95.449579][ T5828] ffff88807386a640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   95.463109][ T5828] 
[   95.463109][ T5828] but task is already holding lock:
[   95.470481][ T5828] ffff88807386eab8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[   95.479983][ T5828] 
[   95.479983][ T5828] which lock already depends on the new lock.
[   95.479983][ T5828] 
[   95.490386][ T5828] 
[   95.490386][ T5828] the existing dependency chain (in reverse order) is:
[   95.499408][ T5828] 
[   95.499408][ T5828] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}:
[   95.507407][ T5828]        lock_acquire+0x120/0x360
[   95.512472][ T5828]        down_write+0x96/0x1f0
[   95.517257][ T5828]        ocfs2_xattr_set_handle+0x3b0/0x7a0
[   95.523163][ T5828]        ocfs2_init_security_set+0xbd/0xe0
[   95.528989][ T5828]        ocfs2_mknod+0x137f/0x2050
[   95.534115][ T5828]        ocfs2_mkdir+0x191/0x440
[   95.539066][ T5828]        vfs_mkdir+0x306/0x510
[   95.543843][ T5828]        do_mkdirat+0x247/0x590
[   95.548767][ T5828]        __x64_sys_mkdirat+0x87/0xa0
[   95.554063][ T5828]        do_syscall_64+0xfa/0x3b0
[   95.559089][ T5828]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   95.565549][ T5828] 
[   95.565549][ T5828] -> #3 (jbd2_handle){.+.+}-{0:0}:
[   95.572863][ T5828]        lock_acquire+0x120/0x360
[   95.577901][ T5828]        start_this_handle+0x1fa7/0x21c0
[   95.583562][ T5828]        jbd2__journal_start+0x2c1/0x5b0
[   95.589216][ T5828]        jbd2_journal_start+0x2a/0x40
[   95.594606][ T5828]        ocfs2_start_trans+0x376/0x6d0
[   95.600080][ T5828]        ocfs2_reserve_suballoc_bits+0x711/0x4640
[   95.606510][ T5828]        ocfs2_reserve_new_metadata_blocks+0x403/0x940
[   95.613380][ T5828]        ocfs2_mknod+0xe08/0x2050
[   95.618419][ T5828]        ocfs2_mkdir+0x191/0x440
[   95.623377][ T5828]        vfs_mkdir+0x306/0x510
[   95.628151][ T5828]        do_mkdirat+0x247/0x590
[   95.633013][ T5828]        __x64_sys_mkdirat+0x87/0xa0
[   95.638308][ T5828]        do_syscall_64+0xfa/0x3b0
[   95.643342][ T5828]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   95.649764][ T5828] 
[   95.649764][ T5828] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
[   95.658300][ T5828]        lock_acquire+0x120/0x360
[   95.663339][ T5828]        down_read+0x46/0x2e0
[   95.668020][ T5828]        ocfs2_start_trans+0x36a/0x6d0
[   95.673504][ T5828]        ocfs2_reserve_suballoc_bits+0x711/0x4640
[   95.679933][ T5828]        ocfs2_reserve_new_metadata_blocks+0x403/0x940
[   95.686795][ T5828]        ocfs2_mknod+0xe08/0x2050
[   95.691838][ T5828]        ocfs2_mkdir+0x191/0x440
[   95.696781][ T5828]        vfs_mkdir+0x306/0x510
[   95.701556][ T5828]        do_mkdirat+0x247/0x590
[   95.706415][ T5828]        __x64_sys_mkdirat+0x87/0xa0
[   95.711710][ T5828]        do_syscall_64+0xfa/0x3b0
[   95.716739][ T5828]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   95.723159][ T5828] 
[   95.723159][ T5828] -> #1 (sb_internal#2){.+.+}-{0:0}:
[   95.730653][ T5828]        lock_acquire+0x120/0x360
[   95.735688][ T5828]        ocfs2_start_trans+0x26b/0x6d0
[   95.741163][ T5828]        ocfs2_mknod+0xe93/0x2050
[   95.746194][ T5828]        ocfs2_mkdir+0x191/0x440
[   95.751138][ T5828]        vfs_mkdir+0x306/0x510
[   95.755952][ T5828]        do_mkdirat+0x247/0x590
[   95.760815][ T5828]        __x64_sys_mkdirat+0x87/0xa0
[   95.766112][ T5828]        do_syscall_64+0xfa/0x3b0
[   95.771159][ T5828]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   95.777601][ T5828] 
[   95.777601][ T5828] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}:
[   95.788159][ T5828]        validate_chain+0xb9b/0x2140
[   95.793479][ T5828]        __lock_acquire+0xab9/0xd20
[   95.798694][ T5828]        lock_acquire+0x120/0x360
[   95.803728][ T5828]        down_write+0x96/0x1f0
[   95.808501][ T5828]        ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   95.815201][ T5828]        ocfs2_reserve_clusters_with_limit+0x1be/0xba0
[   95.822090][ T5828]        ocfs2_init_xattr_set_ctxt+0x376/0x700
[   95.828253][ T5828]        ocfs2_xattr_set+0xb70/0x11f0
[   95.833629][ T5828]        __vfs_setxattr+0x439/0x480
[   95.838851][ T5828]        __vfs_setxattr_noperm+0x12d/0x660
[   95.844689][ T5828]        vfs_setxattr+0x16b/0x2f0
[   95.849731][ T5828]        ovl_get_workdir+0xbb7/0x1730
[   95.855118][ T5828]        ovl_fill_super+0x1386/0x35d0
[   95.860505][ T5828]        get_tree_nodev+0xb8/0x150
[   95.865625][ T5828]        vfs_get_tree+0x92/0x2b0
[   95.870579][ T5828]        do_new_mount+0x24a/0xa40
[   95.875634][ T5828]        __se_sys_mount+0x317/0x410
[   95.880842][ T5828]        do_syscall_64+0xfa/0x3b0
[   95.885885][ T5828]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   95.892320][ T5828] 
[   95.892320][ T5828] other info that might help us debug this:
[   95.892320][ T5828] 
[   95.902557][ T5828] Chain exists of:
[   95.902557][ T5828]   &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> jbd2_handle --> &oi->ip_xattr_sem
[   95.902557][ T5828] 
[   95.918308][ T5828]  Possible unsafe locking scenario:
[   95.918308][ T5828] 
[   95.925768][ T5828]        CPU0                    CPU1
[   95.931142][ T5828]        ----                    ----
[   95.936509][ T5828]   lock(&oi->ip_xattr_sem);
[   95.941117][ T5828]                                lock(jbd2_handle);
[   95.947718][ T5828]                                lock(&oi->ip_xattr_sem);
[   95.954841][ T5828]   lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
[   95.962142][ T5828] 
[   95.962142][ T5828]  *** DEADLOCK ***
[   95.962142][ T5828] 
[   95.970301][ T5828] 4 locks held by syz-executor412/5828:
[   95.975851][ T5828]  #0: ffff8880340ac0e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970
[   95.985996][ T5828]  #1: ffff888033190428 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
[   95.995154][ T5828]  #2: ffff88807386ed80 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0
[   96.005631][ T5828]  #3: ffff88807386eab8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[   96.015591][ T5828] 
[   96.015591][ T5828] stack backtrace:
[   96.021524][ T5828] CPU: 0 UID: 0 PID: 5828 Comm: syz-executor412 Not tainted 6.16.0-rc1-syzkaller-00005-g488ef3560196 #0 PREEMPT(full) 
[   96.021543][ T5828] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[   96.021556][ T5828] Call Trace:
[   96.021566][ T5828]  <TASK>
[   96.021573][ T5828]  dump_stack_lvl+0x189/0x250
[   96.021599][ T5828]  ? __pfx_dump_stack_lvl+0x10/0x10
[   96.021621][ T5828]  ? __pfx__printk+0x10/0x10
[   96.021636][ T5828]  ? print_lock_name+0xde/0x100
[   96.021661][ T5828]  print_circular_bug+0x2ee/0x310
[   96.021686][ T5828]  check_noncircular+0x134/0x160
[   96.021712][ T5828]  validate_chain+0xb9b/0x2140
[   96.021735][ T5828]  ? __mutex_unlock_slowpath+0x1cd/0x700
[   96.021761][ T5828]  ? __pfx___mutex_unlock_slowpath+0x10/0x10
[   96.021788][ T5828]  __lock_acquire+0xab9/0xd20
[   96.021809][ T5828]  ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   96.021828][ T5828]  lock_acquire+0x120/0x360
[   96.021846][ T5828]  ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   96.021865][ T5828]  ? is_bpf_text_address+0x26/0x2b0
[   96.021887][ T5828]  ? kernel_text_address+0xa5/0xe0
[   96.021905][ T5828]  down_write+0x96/0x1f0
[   96.021920][ T5828]  ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   96.021937][ T5828]  ? __pfx_down_write+0x10/0x10
[   96.021954][ T5828]  ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[   96.021975][ T5828]  ? check_noncircular+0xe0/0x160
[   96.021999][ T5828]  ? lockdep_unlock+0x89/0x120
[   96.022015][ T5828]  ? validate_chain+0x897/0x2140
[   96.022036][ T5828]  ? __pfx_ocfs2_reserve_local_alloc_bits+0x10/0x10
[   96.022053][ T5828]  ? get_tree_nodev+0xb8/0x150
[   96.022076][ T5828]  ? __lock_acquire+0xab9/0xd20
[   96.022107][ T5828]  ? do_raw_spin_unlock+0x122/0x240
[   96.022123][ T5828]  ? _raw_spin_unlock+0x28/0x50
[   96.022142][ T5828]  ? ocfs2_alloc_should_use_local+0x152/0x310
[   96.022158][ T5828]  ? ocfs2_reserve_clusters_with_limit+0x16b/0xba0
[   96.022183][ T5828]  ocfs2_reserve_clusters_with_limit+0x1be/0xba0
[   96.022207][ T5828]  ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10
[   96.022233][ T5828]  ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10
[   96.022252][ T5828]  ? __lock_acquire+0xab9/0xd20
[   96.022274][ T5828]  ocfs2_init_xattr_set_ctxt+0x376/0x700
[   96.022290][ T5828]  ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10
[   96.022306][ T5828]  ? ocfs2_xattr_set+0xb36/0x11f0
[   96.022321][ T5828]  ? up_write+0x1c4/0x420
[   96.022333][ T5828]  ? ocfs2_xattr_set+0x334/0x11f0
[   96.022346][ T5828]  ocfs2_xattr_set+0xb70/0x11f0
[   96.022367][ T5828]  ? __pfx_ocfs2_xattr_set+0x10/0x10
[   96.022380][ T5828]  ? up+0xde/0x150
[   96.022395][ T5828]  ? smack_log+0xef/0x3f0
[   96.022410][ T5828]  ? __pfx___console_unlock+0x10/0x10
[   96.022423][ T5828]  ? smk_access+0x14c/0x4e0
[   96.022438][ T5828]  ? smk_tskacc+0x2fc/0x370
[   96.022453][ T5828]  ? posix_xattr_acl+0x93/0xc0
[   96.022474][ T5828]  ? evm_protect_xattr+0x4d4/0xa90
[   96.022496][ T5828]  ? __pfx_evm_protect_xattr+0x10/0x10
[   96.022515][ T5828]  ? safesetid_security_capable+0xa9/0x1a0
[   96.022534][ T5828]  ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10
[   96.022548][ T5828]  __vfs_setxattr+0x439/0x480
[   96.022571][ T5828]  __vfs_setxattr_noperm+0x12d/0x660
[   96.022592][ T5828]  vfs_setxattr+0x16b/0x2f0
[   96.022612][ T5828]  ? __pfx_vfs_setxattr+0x10/0x10
[   96.022631][ T5828]  ? up_write+0x1c4/0x420
[   96.022645][ T5828]  ovl_get_workdir+0xbb7/0x1730
[   96.022670][ T5828]  ? __pfx_ovl_get_workdir+0x10/0x10
[   96.022700][ T5828]  ? do_raw_spin_unlock+0x122/0x240
[   96.022716][ T5828]  ? _raw_spin_unlock+0x28/0x50
[   96.022734][ T5828]  ? ovl_inuse_trylock+0xae/0xf0
[   96.022754][ T5828]  ovl_fill_super+0x1386/0x35d0
[   96.022778][ T5828]  ? rcu_is_watching+0x15/0xb0
[   96.022802][ T5828]  ? shrinker_register+0x124/0x230
[   96.022826][ T5828]  ? __pfx_ovl_fill_super+0x10/0x10
[   96.022846][ T5828]  ? __pfx___mutex_lock+0x10/0x10
[   96.022859][ T5828]  ? __pfx___mutex_unlock_slowpath+0x10/0x10
[   96.022883][ T5828]  ? __raw_spin_lock_init+0x45/0x100
[   96.022902][ T5828]  ? sget_fc+0x962/0xa40
[   96.022916][ T5828]  ? __pfx_set_anon_super_fc+0x10/0x10
[   96.022930][ T5828]  ? __pfx_ovl_fill_super+0x10/0x10
[   96.022951][ T5828]  get_tree_nodev+0xb8/0x150
[   96.022967][ T5828]  vfs_get_tree+0x92/0x2b0
[   96.022984][ T5828]  do_new_mount+0x24a/0xa40
[   96.023006][ T5828]  __se_sys_mount+0x317/0x410
[   96.023026][ T5828]  ? __pfx___se_sys_mount+0x10/0x10
[   96.023044][ T5828]  ? rcu_is_watching+0x15/0xb0
[   96.023066][ T5828]  ? __x64_sys_mount+0x20/0xc0
[   96.023085][ T5828]  do_syscall_64+0xfa/0x3b0
[   96.023103][ T5828]  ? lockdep_hardirqs_on+0x9c/0x150
[   96.023124][ T5828]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   96.023138][ T5828]  ? clear_bhb_loop+0x60/0xb0
[   96.023154][ T5828]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   96.023169][ T5828] RIP: 0033:0x7f519231cbd9
[   96.023186][ T5828] 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
[   96.023198][ T5828] RSP: 002b:00007ffe4698ceb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   96.023214][ T5828] RAX: ffffffffffffffda RBX: 00002000000000c0 RCX: 00007f519231cbd9
[   96.023225][ T5828] RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000
[   96.023234][ T5828] RBP: 00007f51923945f0 R08: 0000200000000a00 R09: 000055556146c4c0
[   96.023245][ T5828] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe4698cee0
[   96.023254][ T5828] R13: 00007ffe4698d108 R14: 00002000000000c4 R15: 00007f519236503b
[pid  5828] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5828] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5828] exit_group(0)               = ?
[pid  5828] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5828, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=29 /* 0.29 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 5832 attached
, child_tidptr=0x55556146b650) = 5832
[pid  5832] set_robust_list(0x55556146b660, 24) = 0
[pid  5832] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   96.023270][ T5828]  </TASK>
[   96.550663][ T5828] overlayfs: upper fs missing required features.
[pid  5832] setpgid(0, 0)               = 0
[pid  5832] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5832] write(3, "1000", 4)         = 4
[pid  5832] close(3)                    = 0
[pid  5832] write(1, "executing program\n", 18executing program
) = 18
[pid  5832] memfd_create("syzkaller", 0) = 3
[pid  5832] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[pid  5832] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5832] munmap(0x7f5189e00000, 138412032) = 0
[pid  5832] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5832] close(3)                    = 0
[pid  5832] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5832] mkdirat(AT_FDCWD, "./file0", 000) = 0
[pid  5832] mkdir("./bus", 000)         = 0
[pid  5832] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5832] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5832] exit_group(0)               = ?
[pid  5832] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5832, si_uid=0, si_status=0, si_utime=5 /* 0.05 s */, si_stime=13 /* 0.13 s */} ---
[   96.840322][ T5832] overlayfs: workdir and upperdir must reside under the same mount
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5833 attached
, child_tidptr=0x55556146b650) = 5833
[pid  5833] set_robust_list(0x55556146b660, 24) = 0
[pid  5833] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5833] setpgid(0, 0)               = 0
[pid  5833] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5833] write(3, "1000", 4)         = 4
[pid  5833] close(3)                    = 0
[pid  5833] write(1, "executing program\n", 18executing program
) = 18
[pid  5833] memfd_create("syzkaller", 0) = 3
[pid  5833] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[pid  5833] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5833] munmap(0x7f5189e00000, 138412032) = 0
[pid  5833] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5833] close(3)                    = 0
[pid  5833] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5833] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5833] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5833] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5833] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5833] exit_group(0)               = ?
[pid  5833] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5833, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=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 5836 attached
 <unfinished ...>
[pid  5836] set_robust_list(0x55556146b660, 24 <unfinished ...>
[pid  5827] <... clone resumed>, child_tidptr=0x55556146b650) = 5836
[pid  5836] <... set_robust_list resumed>) = 0
[pid  5836] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5836] setpgid(0, 0)               = 0
[   97.200073][ T5833] overlayfs: workdir and upperdir must reside under the same mount
[pid  5836] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5836] write(3, "1000", 4)         = 4
[pid  5836] close(3)                    = 0
[pid  5836] write(1, "executing program\n", 18executing program
) = 18
[pid  5836] memfd_create("syzkaller", 0) = 3
[pid  5836] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[   97.301133][  T980] cfg80211: failed to load regulatory.db
[pid  5836] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5836] munmap(0x7f5189e00000, 138412032) = 0
[pid  5836] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5836] close(3)                    = 0
[pid  5836] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5836] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5836] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5836] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5836] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5836] exit_group(0)               = ?
[pid  5836] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5836, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=14 /* 0.14 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   97.541323][ T5836] 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 5837 attached
, child_tidptr=0x55556146b650) = 5837
[pid  5837] set_robust_list(0x55556146b660, 24) = 0
[pid  5837] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5837] setpgid(0, 0)               = 0
[pid  5837] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5837] write(3, "1000", 4)         = 4
[pid  5837] close(3)                    = 0
executing program
[pid  5837] write(1, "executing program\n", 18) = 18
[pid  5837] memfd_create("syzkaller", 0) = 3
[pid  5837] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[pid  5837] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5837] munmap(0x7f5189e00000, 138412032) = 0
[pid  5837] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5837] close(3)                    = 0
[pid  5837] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5837] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5837] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5837] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5837] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5837] exit_group(0)               = ?
[pid  5837] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5837, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=14 /* 0.14 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5839 attached
, child_tidptr=0x55556146b650) = 5839
[pid  5839] set_robust_list(0x55556146b660, 24) = 0
[   97.877998][ T5837] overlayfs: workdir and upperdir must reside under the same mount
[pid  5839] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5839] setpgid(0, 0)               = 0
[pid  5839] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5839] write(3, "1000", 4)         = 4
[pid  5839] close(3)                    = 0
[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) = 0x7f5189e00000
[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(0x7f5189e00000, 138412032) = 0
[pid  5839] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5839] close(3)                    = 0
[pid  5839] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5839] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5839] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5839] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5839] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5839] exit_group(0)               = ?
[pid  5839] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5839, si_uid=0, si_status=0, si_utime=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 5840 attached
, child_tidptr=0x55556146b650) = 5840
[pid  5840] set_robust_list(0x55556146b660, 24) = 0
[pid  5840] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   98.214493][ T5839] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f5189e00000
[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(0x7f5189e00000, 138412032) = 0
[pid  5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5840] close(3)                    = 0
[pid  5840] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5840] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5840] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5840] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5840] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5840] exit_group(0)               = ?
[pid  5840] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5840, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=15 /* 0.15 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   98.522962][ T5840] 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 5842 attached
, child_tidptr=0x55556146b650) = 5842
[pid  5842] set_robust_list(0x55556146b660, 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) = 0x7f5189e00000
[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(0x7f5189e00000, 138412032) = 0
[pid  5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5842] close(3)                    = 0
[pid  5842] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5842] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5842] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5842] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5842] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5842] exit_group(0)               = ?
[pid  5842] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5842, si_uid=0, si_status=0, si_utime=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)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5845 attached
, child_tidptr=0x55556146b650) = 5845
[pid  5845] set_robust_list(0x55556146b660, 24) = 0
[pid  5845] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5845] setpgid(0, 0)               = 0
[   98.887412][ T5842] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5845] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5845] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5845] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5845] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5845] exit_group(0)               = ?
[pid  5845] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5845, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=13 /* 0.13 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   99.213720][ 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=0x55556146b650) = 5846
[pid  5846] set_robust_list(0x55556146b660, 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) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5846] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5846] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5846] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5846] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5846] exit_group(0)               = ?
[pid  5846] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5846, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=16 /* 0.16 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   99.581649][ T5846] 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, child_tidptr=0x55556146b650) = 5847
./strace-static-x86_64: Process 5847 attached
[pid  5847] set_robust_list(0x55556146b660, 24) = 0
[pid  5847] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5847] setpgid(0, 0)               = 0
[pid  5847] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5847] write(3, "1000", 4)         = 4
[pid  5847] close(3)                    = 0
[pid  5847] write(1, "executing program\n", 18executing program
) = 18
[pid  5847] memfd_create("syzkaller", 0) = 3
[pid  5847] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5847] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5847] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5847] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5847] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5847] exit_group(0)               = ?
[pid  5847] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5847, si_uid=0, si_status=0, si_utime=2 /* 0.02 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 5848 attached
, child_tidptr=0x55556146b650) = 5848
[   99.980434][ T5847] overlayfs: workdir and upperdir must reside under the same mount
[pid  5848] set_robust_list(0x55556146b660, 24) = 0
[pid  5848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5848] setpgid(0, 0)               = 0
[pid  5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5848] write(3, "1000", 4)         = 4
[pid  5848] close(3)                    = 0
[pid  5848] write(1, "executing program\n", 18executing program
) = 18
[pid  5848] memfd_create("syzkaller", 0) = 3
[pid  5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5848] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5848] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5848] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5848] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5848] exit_group(0)               = ?
[pid  5848] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5848, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=15 /* 0.15 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[  100.338184][ 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 5849 attached
, child_tidptr=0x55556146b650) = 5849
[pid  5849] set_robust_list(0x55556146b660, 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) = 0x7f5189e00000
[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(0x7f5189e00000, 138412032) = 0
[pid  5849] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5849] close(3)                    = 0
[pid  5849] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5849] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5849] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5849] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5849] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5849] exit_group(0)               = ?
[pid  5849] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5849, si_uid=0, si_status=0, si_utime=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 5851 attached
, child_tidptr=0x55556146b650) = 5851
[  100.748401][ T5849] overlayfs: workdir and upperdir must reside under the same mount
[pid  5851] set_robust_list(0x55556146b660, 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) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5851] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5851] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5851] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5851] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5851] exit_group(0)               = ?
[pid  5851] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5851, si_uid=0, si_status=0, si_utime=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 5852 attached
, child_tidptr=0x55556146b650) = 5852
[pid  5852] set_robust_list(0x55556146b660, 24) = 0
[pid  5852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[  101.104297][ T5851] overlayfs: workdir and upperdir must reside under the same mount
[pid  5852] setpgid(0, 0)               = 0
[pid  5852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5852] write(3, "1000", 4)         = 4
[pid  5852] close(3)                    = 0
executing program
[pid  5852] write(1, "executing program\n", 18) = 18
[pid  5852] memfd_create("syzkaller", 0) = 3
[pid  5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[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(0x7f5189e00000, 138412032) = 0
[pid  5852] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5852] close(3)                    = 0
[pid  5852] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5852] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5852] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5852] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5852] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5852] exit_group(0)               = ?
[pid  5852] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5852, si_uid=0, si_status=0, si_utime=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 5853 attached
, child_tidptr=0x55556146b650) = 5853
[  101.429225][ T5852] overlayfs: workdir and upperdir must reside under the same mount
[pid  5853] set_robust_list(0x55556146b660, 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
[pid  5853] write(1, "executing program\n", 18executing program
) = 18
[pid  5853] memfd_create("syzkaller", 0) = 3
[pid  5853] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[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(0x7f5189e00000, 138412032) = 0
[pid  5853] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5853] close(3)                    = 0
[pid  5853] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5853] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5853] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5853] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5853] chdir(NULL)                 = -1 EFAULT (Bad address)
[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=2 /* 0.02 s */, si_stime=14 /* 0.14 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[  101.784929][ 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=0x55556146b650) = 5854
[pid  5854] set_robust_list(0x55556146b660, 24) = 0
[pid  5854] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5854] setpgid(0, 0)               = 0
[pid  5854] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5854] write(3, "1000", 4)         = 4
[pid  5854] close(3)                    = 0
executing program
[pid  5854] write(1, "executing program\n", 18) = 18
[pid  5854] memfd_create("syzkaller", 0) = 3
[pid  5854] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5854] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5854] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5854] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5854] chdir(NULL)                 = -1 EFAULT (Bad address)
[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=4 /* 0.04 s */, si_stime=12 /* 0.12 s */} ---
[  102.160766][ T5854] 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 5855 attached
, child_tidptr=0x55556146b650) = 5855
[pid  5855] set_robust_list(0x55556146b660, 24) = 0
[pid  5855] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5855] setpgid(0, 0)               = 0
[pid  5855] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5855] write(3, "1000", 4)         = 4
[pid  5855] close(3)                    = 0
executing program
[pid  5855] write(1, "executing program\n", 18) = 18
[pid  5855] memfd_create("syzkaller", 0) = 3
[pid  5855] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[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(0x7f5189e00000, 138412032) = 0
[pid  5855] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5855] close(3)                    = 0
[pid  5855] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5855] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5855] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5855] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5855] chdir(NULL)                 = -1 EFAULT (Bad address)
[pid  5855] exit_group(0)               = ?
[pid  5855] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5855, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=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 5856 attached
, child_tidptr=0x55556146b650) = 5856
[  102.491071][ T5855] overlayfs: workdir and upperdir must reside under the same mount
[pid  5856] set_robust_list(0x55556146b660, 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) = 0x7f5189e00000
[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(0x7f5189e00000, 138412032) = 0
[pid  5856] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5856] close(3)                    = 0
[pid  5856] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5856] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5856] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5856] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5856] chdir(NULL)                 = -1 EFAULT (Bad address)
[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=4 /* 0.04 s */, si_stime=14 /* 0.14 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5857 attached
, child_tidptr=0x55556146b650) = 5857
[  102.859746][ T5856] overlayfs: workdir and upperdir must reside under the same mount
[pid  5857] set_robust_list(0x55556146b660, 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", 4executing program
)         = 4
[pid  5857] close(3)                    = 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) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5857] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5857] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5857] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5857] chdir(NULL)                 = -1 EFAULT (Bad address)
[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=13 /* 0.13 s */} ---
[  103.238390][ T5857] 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 5858 attached
, child_tidptr=0x55556146b650) = 5858
[pid  5858] set_robust_list(0x55556146b660, 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
executing program
[pid  5858] write(1, "executing program\n", 18) = 18
[pid  5858] memfd_create("syzkaller", 0) = 3
[pid  5858] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5858] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5858] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5858] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5858] chdir(NULL)                 = -1 EFAULT (Bad address)
[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=5 /* 0.05 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 5859 attached
, child_tidptr=0x55556146b650) = 5859
[pid  5859] set_robust_list(0x55556146b660, 24) = 0
[pid  5859] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5859] setpgid(0, 0)               = 0
[pid  5859] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5859] write(3, "1000", 4)         = 4
[pid  5859] close(3)                    = 0
executing program
[pid  5859] write(1, "executing program\n", 18) = 18
[pid  5859] memfd_create("syzkaller", 0) = 3
[pid  5859] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[  103.588088][ T5858] overlayfs: workdir and upperdir must reside under the same mount
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5859] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5859] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5859] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5859] chdir(NULL)                 = -1 EFAULT (Bad address)
[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=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 5861 attached
, child_tidptr=0x55556146b650) = 5861
[  103.885064][ T5859] overlayfs: workdir and upperdir must reside under the same mount
[pid  5861] set_robust_list(0x55556146b660, 24) = 0
[pid  5861] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5861] setpgid(0, 0)               = 0
[pid  5861] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5861] write(3, "1000", 4)         = 4
[pid  5861] close(3)                    = 0
[pid  5861] write(1, "executing program\n", 18executing program
) = 18
[pid  5861] memfd_create("syzkaller", 0) = 3
[pid  5861] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[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(0x7f5189e00000, 138412032) = 0
[pid  5861] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5861] close(3)                    = 0
[pid  5861] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5861] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5861] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5861] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5861] chdir(NULL)                 = -1 EFAULT (Bad address)
[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=2 /* 0.02 s */, si_stime=14 /* 0.14 s */} ---
[  104.242379][ T5861] 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 5862 attached
, child_tidptr=0x55556146b650) = 5862
[pid  5862] set_robust_list(0x55556146b660, 24) = 0
[pid  5862] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5862] setpgid(0, 0)               = 0
[pid  5862] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5862] write(3, "1000", 4)         = 4
[pid  5862] close(3)                    = 0
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) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5862] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5862] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5862] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5862] chdir(NULL)                 = -1 EFAULT (Bad address)
[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=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)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5863 attached
 <unfinished ...>
[pid  5863] set_robust_list(0x55556146b660, 24 <unfinished ...>
[pid  5827] <... clone resumed>, child_tidptr=0x55556146b650) = 5863
[pid  5863] <... set_robust_list resumed>) = 0
[pid  5863] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5863] setpgid(0, 0)               = 0
[  104.599403][ T5862] overlayfs: workdir and upperdir must reside under the same mount
[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
[pid  5863] write(1, "executing program\n", 18executing program
) = 18
[pid  5863] memfd_create("syzkaller", 0) = 3
[pid  5863] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5863] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5863] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5863] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5863] chdir(NULL)                 = -1 EFAULT (Bad address)
[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=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)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5864 attached
, child_tidptr=0x55556146b650) = 5864
[pid  5864] set_robust_list(0x55556146b660, 24) = 0
[pid  5864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5864] setpgid(0, 0)               = 0
[  104.935110][ T5863] overlayfs: workdir and upperdir must reside under the same mount
[pid  5864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5864] write(3, "1000", 4)         = 4
[pid  5864] close(3)                    = 0
executing program
[pid  5864] write(1, "executing program\n", 18) = 18
[pid  5864] memfd_create("syzkaller", 0) = 3
[pid  5864] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5189e00000
[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(0x7f5189e00000, 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, "./file1", 000) = -1 EEXIST (File exists)
[pid  5864] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5864] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5864] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5864] chdir(NULL)                 = -1 EFAULT (Bad address)
[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=3 /* 0.03 s */, si_stime=15 /* 0.15 s */} ---
[  105.252447][ T5864] 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 5865 attached
, child_tidptr=0x55556146b650) = 5865
[pid  5865] set_robust_list(0x55556146b660, 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) = 0x7f5189e00000