./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3597681003

<...>
Warning: Permanently added '10.128.1.179' (ED25519) to the list of known hosts.
execve("./syz-executor3597681003", ["./syz-executor3597681003"], 0x7ffed0c09c40 /* 10 vars */) = 0
brk(NULL)                               = 0x555562521000
brk(0x555562521d00)                     = 0x555562521d00
arch_prctl(ARCH_SET_FS, 0x555562521380) = 0
set_tid_address(0x555562521650)         = 5826
set_robust_list(0x555562521660, 24)     = 0
rseq(0x555562521ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor3597681003", 4096) = 28
getrandom("\xe1\x85\xdf\xce\x46\xde\xb1\x91", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555562521d00
brk(0x555562542d00)                     = 0x555562542d00
brk(0x555562543000)                     = 0x555562543000
mprotect(0x7f24533ee000, 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 5827 attached
 <unfinished ...>
[pid  5827] set_robust_list(0x555562521660, 24 <unfinished ...>
[pid  5826] <... clone resumed>, child_tidptr=0x555562521650) = 5827
[pid  5827] <... set_robust_list resumed>) = 0
[pid  5827] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5827] setpgid(0, 0)               = 0
[pid  5827] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5827] write(3, "1000", 4)         = 4
[pid  5827] close(3)                    = 0
[pid  5827] write(1, "executing program\n", 18executing program
) = 18
[pid  5827] memfd_create("syzkaller", 0) = 3
[pid  5827] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[pid  5827] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5827] munmap(0x7f244ae00000, 138412032) = 0
[pid  5827] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5827] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5827] close(3)                    = 0
[pid  5827] close(4)                    = 0
[pid  5827] mkdir("./file1", 0777)      = 0
[   88.571664][ T5827] loop0: detected capacity change from 0 to 32768
[   88.587149][ T5827] =======================================================
[   88.587149][ T5827] WARNING: The mand mount option has been deprecated and
[   88.587149][ T5827]          and is ignored by this kernel. Remove the mand
[   88.587149][ T5827]          option from the mount to silence this warning.
[   88.587149][ T5827] =======================================================
[pid  5827] mount("/dev/loop0", "./file1", "ocfs2", MS_MANDLOCK|MS_DIRSYNC|MS_NODIRATIME, "acl,heartbeat=none,nouser_xattr,coherency=full,data=writeback,localalloc=00000000000000000001,acl,no"...) = 0
[pid  5827] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid  5827] chdir("./file1")            = 0
[pid  5827] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5827] mkdir("./file0", 000)       = 0
[pid  5827] mkdirat(AT_FDCWD, "./file1", 000) = 0
[   88.652393][ T5827] ocfs2: Mounting device (7,0) on (node local, slot 0) with writeback data mode.
[pid  5827] mkdir("./bus", 000)         = 0
[   88.728654][ T5827] overlayfs: upper fs does not support tmpfile.
[   88.737305][ T5827] overlayfs: upper fs does not support RENAME_WHITEOUT.
[   88.744530][ T5827] 
[   88.746852][ T5827] ======================================================
[   88.753852][ T5827] WARNING: possible circular locking dependency detected
[   88.760865][ T5827] 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 Not tainted
[   88.767610][ T5827] ------------------------------------------------------
[   88.774612][ T5827] syz-executor359/5827 is trying to acquire lock:
[   88.781007][ T5827] ffff888077d942c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
[   88.794242][ T5827] 
[   88.794242][ T5827] but task is already holding lock:
[   88.801592][ T5827] ffff888077da06f8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[   88.811069][ T5827] 
[   88.811069][ T5827] which lock already depends on the new lock.
[   88.811069][ T5827] 
[   88.821455][ T5827] 
[   88.821455][ T5827] the existing dependency chain (in reverse order) is:
[   88.830454][ T5827] 
[   88.830454][ T5827] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}:
[   88.838269][ T5827]        lock_acquire+0x120/0x360
[   88.843301][ T5827]        down_write+0x96/0x1f0
[   88.848067][ T5827]        ocfs2_xattr_set_handle+0x3b0/0x7a0
[   88.853952][ T5827]        ocfs2_init_security_set+0xbd/0xe0
[   88.859751][ T5827]        ocfs2_mknod+0x137f/0x2050
[   88.864849][ T5827]        ocfs2_mkdir+0x191/0x440
[   88.869774][ T5827]        vfs_mkdir+0x303/0x510
[   88.874523][ T5827]        do_mkdirat+0x247/0x590
[   88.879356][ T5827]        __x64_sys_mkdir+0x6c/0x80
[   88.884453][ T5827]        do_syscall_64+0xfa/0x3b0
[   88.889470][ T5827]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   88.895867][ T5827] 
[   88.895867][ T5827] -> #3 (jbd2_handle){.+.+}-{0:0}:
[   88.903166][ T5827]        lock_acquire+0x120/0x360
[   88.908190][ T5827]        start_this_handle+0x1fa7/0x21c0
[   88.913816][ T5827]        jbd2__journal_start+0x2c1/0x5b0
[   88.919471][ T5827]        jbd2_journal_start+0x2a/0x40
[   88.924836][ T5827]        ocfs2_start_trans+0x376/0x6d0
[   88.930287][ T5827]        ocfs2_reserve_suballoc_bits+0x711/0x4640
[   88.936719][ T5827]        ocfs2_reserve_new_metadata_blocks+0x403/0x940
[   88.943569][ T5827]        ocfs2_mknod+0xe08/0x2050
[   88.948588][ T5827]        ocfs2_mkdir+0x191/0x440
[   88.953516][ T5827]        vfs_mkdir+0x303/0x510
[   88.958265][ T5827]        do_mkdirat+0x247/0x590
[   88.963108][ T5827]        __x64_sys_mkdir+0x6c/0x80
[   88.968205][ T5827]        do_syscall_64+0xfa/0x3b0
[   88.973219][ T5827]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   88.979621][ T5827] 
[   88.979621][ T5827] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
[   88.988121][ T5827]        lock_acquire+0x120/0x360
[   88.993133][ T5827]        down_read+0x46/0x2e0
[   88.997815][ T5827]        ocfs2_start_trans+0x36a/0x6d0
[   89.003287][ T5827]        ocfs2_reserve_suballoc_bits+0x711/0x4640
[   89.009698][ T5827]        ocfs2_reserve_new_metadata_blocks+0x403/0x940
[   89.016544][ T5827]        ocfs2_mknod+0xe08/0x2050
[   89.021560][ T5827]        ocfs2_mkdir+0x191/0x440
[   89.026487][ T5827]        vfs_mkdir+0x303/0x510
[   89.031236][ T5827]        do_mkdirat+0x247/0x590
[   89.036070][ T5827]        __x64_sys_mkdir+0x6c/0x80
[   89.041178][ T5827]        do_syscall_64+0xfa/0x3b0
[   89.046197][ T5827]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   89.052597][ T5827] 
[   89.052597][ T5827] -> #1 (sb_internal#2){.+.+}-{0:0}:
[   89.060083][ T5827]        lock_acquire+0x120/0x360
[   89.065107][ T5827]        ocfs2_start_trans+0x26b/0x6d0
[   89.070562][ T5827]        ocfs2_reserve_suballoc_bits+0x711/0x4640
[   89.076969][ T5827]        ocfs2_reserve_new_metadata_blocks+0x403/0x940
[   89.083814][ T5827]        ocfs2_mknod+0xe08/0x2050
[   89.088831][ T5827]        ocfs2_mkdir+0x191/0x440
[   89.093762][ T5827]        vfs_mkdir+0x303/0x510
[   89.098519][ T5827]        do_mkdirat+0x247/0x590
[   89.103362][ T5827]        __x64_sys_mkdir+0x6c/0x80
[   89.108477][ T5827]        do_syscall_64+0xfa/0x3b0
[   89.113500][ T5827]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   89.119910][ T5827] 
[   89.119910][ T5827] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}:
[   89.130427][ T5827]        validate_chain+0xb9b/0x2140
[   89.135709][ T5827]        __lock_acquire+0xab9/0xd20
[   89.140901][ T5827]        lock_acquire+0x120/0x360
[   89.145917][ T5827]        down_write+0x96/0x1f0
[   89.150679][ T5827]        ocfs2_reserve_suballoc_bits+0x15e/0x4640
[   89.157091][ T5827]        ocfs2_reserve_clusters_with_limit+0x2fb/0xba0
[   89.163940][ T5827]        ocfs2_init_xattr_set_ctxt+0x376/0x700
[   89.170092][ T5827]        ocfs2_xattr_set+0xb70/0x11f0
[   89.175460][ T5827]        __vfs_setxattr+0x43c/0x480
[   89.180652][ T5827]        __vfs_setxattr_noperm+0x12d/0x660
[   89.186453][ T5827]        vfs_setxattr+0x16b/0x2f0
[   89.191469][ T5827]        ovl_get_workdir+0xbb7/0x1730
[   89.196837][ T5827]        ovl_fill_super+0x1386/0x35d0
[   89.202203][ T5827]        get_tree_nodev+0xbb/0x150
[   89.207306][ T5827]        vfs_get_tree+0x8f/0x2b0
[   89.212235][ T5827]        do_new_mount+0x24a/0xa40
[   89.217252][ T5827]        __se_sys_mount+0x317/0x410
[   89.222439][ T5827]        do_syscall_64+0xfa/0x3b0
[   89.227452][ T5827]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   89.233942][ T5827] 
[   89.233942][ T5827] other info that might help us debug this:
[   89.233942][ T5827] 
[   89.244156][ T5827] Chain exists of:
[   89.244156][ T5827]   &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4 --> jbd2_handle --> &oi->ip_xattr_sem
[   89.244156][ T5827] 
[   89.259976][ T5827]  Possible unsafe locking scenario:
[   89.259976][ T5827] 
[   89.267425][ T5827]        CPU0                    CPU1
[   89.272776][ T5827]        ----                    ----
[   89.278128][ T5827]   lock(&oi->ip_xattr_sem);
[   89.282726][ T5827]                                lock(jbd2_handle);
[   89.289308][ T5827]                                lock(&oi->ip_xattr_sem);
[   89.296404][ T5827]   lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4);
[   89.303682][ T5827] 
[   89.303682][ T5827]  *** DEADLOCK ***
[   89.303682][ T5827] 
[   89.311820][ T5827] 4 locks held by syz-executor359/5827:
[   89.317358][ T5827]  #0: ffff8880331d40e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970
[   89.327468][ T5827]  #1: ffff88803037a428 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
[   89.336606][ T5827]  #2: ffff888077da09c0 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0
[   89.347045][ T5827]  #3: ffff888077da06f8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[   89.356958][ T5827] 
[   89.356958][ T5827] stack backtrace:
[   89.362846][ T5827] CPU: 1 UID: 0 PID: 5827 Comm: syz-executor359 Not tainted 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full) 
[   89.362863][ T5827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[   89.362875][ T5827] Call Trace:
[   89.362884][ T5827]  <TASK>
[   89.362891][ T5827]  dump_stack_lvl+0x189/0x250
[   89.362918][ T5827]  ? __pfx_dump_stack_lvl+0x10/0x10
[   89.362937][ T5827]  ? __pfx__printk+0x10/0x10
[   89.362951][ T5827]  ? print_lock_name+0xde/0x100
[   89.362974][ T5827]  print_circular_bug+0x2ee/0x310
[   89.362994][ T5827]  check_noncircular+0x134/0x160
[   89.363014][ T5827]  validate_chain+0xb9b/0x2140
[   89.363033][ T5827]  ? __mutex_unlock_slowpath+0x1cd/0x700
[   89.363053][ T5827]  ? __pfx___mutex_unlock_slowpath+0x10/0x10
[   89.363074][ T5827]  __lock_acquire+0xab9/0xd20
[   89.363090][ T5827]  ? ocfs2_reserve_suballoc_bits+0x15e/0x4640
[   89.363108][ T5827]  lock_acquire+0x120/0x360
[   89.363122][ T5827]  ? ocfs2_reserve_suballoc_bits+0x15e/0x4640
[   89.363140][ T5827]  ? __kasan_check_byte+0x12/0x40
[   89.363155][ T5827]  ? unwind_next_frame+0xa5/0x2390
[   89.363174][ T5827]  down_write+0x96/0x1f0
[   89.363192][ T5827]  ? ocfs2_reserve_suballoc_bits+0x15e/0x4640
[   89.363209][ T5827]  ? __pfx_down_write+0x10/0x10
[   89.363240][ T5827]  ? lock_release+0x4b/0x3e0
[   89.363255][ T5827]  ocfs2_reserve_suballoc_bits+0x15e/0x4640
[   89.363274][ T5827]  ? is_bpf_text_address+0x26/0x2b0
[   89.363292][ T5827]  ? kernel_text_address+0xa5/0xe0
[   89.363306][ T5827]  ? __kernel_text_address+0xd/0x40
[   89.363318][ T5827]  ? unwind_get_return_address+0x4d/0x90
[   89.363334][ T5827]  ? __pfx_stack_trace_consume_entry+0x10/0x10
[   89.363359][ T5827]  ? arch_stack_walk+0xfc/0x150
[   89.363380][ T5827]  ? stack_trace_save+0x9c/0xe0
[   89.363399][ T5827]  ? __pfx_ocfs2_reserve_suballoc_bits+0x10/0x10
[   89.363418][ T5827]  ? check_path+0x21/0x40
[   89.363433][ T5827]  ? check_noncircular+0xe0/0x160
[   89.363452][ T5827]  ? lockdep_unlock+0x89/0x120
[   89.363464][ T5827]  ? validate_chain+0x897/0x2140
[   89.363481][ T5827]  ? get_tree_nodev+0xbb/0x150
[   89.363499][ T5827]  ? __lock_acquire+0xab9/0xd20
[   89.363520][ T5827]  ? do_raw_spin_unlock+0x122/0x240
[   89.363540][ T5827]  ? _raw_spin_unlock+0x28/0x50
[   89.363553][ T5827]  ? ocfs2_alloc_should_use_local+0x152/0x310
[   89.363567][ T5827]  ? ocfs2_reserve_clusters_with_limit+0x16b/0xba0
[   89.363586][ T5827]  ocfs2_reserve_clusters_with_limit+0x2fb/0xba0
[   89.363606][ T5827]  ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10
[   89.363627][ T5827]  ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10
[   89.363642][ T5827]  ? __lock_acquire+0xab9/0xd20
[   89.363659][ T5827]  ocfs2_init_xattr_set_ctxt+0x376/0x700
[   89.363682][ T5827]  ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10
[   89.363703][ T5827]  ? ocfs2_xattr_set+0xb36/0x11f0
[   89.363723][ T5827]  ? up_write+0x1c4/0x420
[   89.363740][ T5827]  ? ocfs2_xattr_set+0x334/0x11f0
[   89.363760][ T5827]  ocfs2_xattr_set+0xb70/0x11f0
[   89.363786][ T5827]  ? __pfx_ocfs2_xattr_set+0x10/0x10
[   89.363805][ T5827]  ? up+0xde/0x150
[   89.363824][ T5827]  ? smack_log+0xef/0x3f0
[   89.363850][ T5827]  ? __pfx___console_unlock+0x10/0x10
[   89.363868][ T5827]  ? smk_access+0x14c/0x4e0
[   89.363881][ T5827]  ? smk_tskacc+0x2fc/0x370
[   89.363895][ T5827]  ? posix_xattr_acl+0x93/0xc0
[   89.363914][ T5827]  ? evm_protect_xattr+0x4d4/0xa90
[   89.363933][ T5827]  ? __pfx_evm_protect_xattr+0x10/0x10
[   89.363951][ T5827]  ? safesetid_security_capable+0xa9/0x1a0
[   89.363967][ T5827]  ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10
[   89.363986][ T5827]  __vfs_setxattr+0x43c/0x480
[   89.364004][ T5827]  __vfs_setxattr_noperm+0x12d/0x660
[   89.364020][ T5827]  vfs_setxattr+0x16b/0x2f0
[   89.364035][ T5827]  ? __pfx_vfs_setxattr+0x10/0x10
[   89.364050][ T5827]  ? up_write+0x1c4/0x420
[   89.364068][ T5827]  ovl_get_workdir+0xbb7/0x1730
[   89.364088][ T5827]  ? __pfx_ovl_get_workdir+0x10/0x10
[   89.364114][ T5827]  ? do_raw_spin_unlock+0x122/0x240
[   89.364133][ T5827]  ? _raw_spin_unlock+0x28/0x50
[   89.364145][ T5827]  ? ovl_inuse_trylock+0xae/0xf0
[   89.364162][ T5827]  ovl_fill_super+0x1386/0x35d0
[   89.364182][ T5827]  ? rcu_is_watching+0x15/0xb0
[   89.364200][ T5827]  ? shrinker_register+0x124/0x230
[   89.364220][ T5827]  ? __pfx_ovl_fill_super+0x10/0x10
[   89.364237][ T5827]  ? __pfx___mutex_lock+0x10/0x10
[   89.364252][ T5827]  ? __pfx___mutex_unlock_slowpath+0x10/0x10
[   89.364271][ T5827]  ? __raw_spin_lock_init+0x45/0x100
[   89.364293][ T5827]  ? sget_fc+0x962/0xa40
[   89.364312][ T5827]  ? __pfx_set_anon_super_fc+0x10/0x10
[   89.364323][ T5827]  ? __pfx_ovl_fill_super+0x10/0x10
[   89.364339][ T5827]  get_tree_nodev+0xbb/0x150
[   89.364355][ T5827]  vfs_get_tree+0x8f/0x2b0
[   89.364369][ T5827]  do_new_mount+0x24a/0xa40
[   89.364385][ T5827]  __se_sys_mount+0x317/0x410
[   89.364402][ T5827]  ? __pfx___se_sys_mount+0x10/0x10
[   89.364415][ T5827]  ? rcu_is_watching+0x15/0xb0
[   89.364432][ T5827]  ? __x64_sys_mount+0x20/0xc0
[   89.364447][ T5827]  do_syscall_64+0xfa/0x3b0
[   89.364463][ T5827]  ? lockdep_hardirqs_on+0x9c/0x150
[   89.364478][ T5827]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   89.364490][ T5827]  ? clear_bhb_loop+0x60/0xb0
[   89.364504][ T5827]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   89.364516][ T5827] RIP: 0033:0x7f2453376c19
[   89.364534][ T5827] 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
[   89.364547][ T5827] RSP: 002b:00007fffb3cfef28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   89.364560][ T5827] RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f2453376c19
[   89.364570][ T5827] RDX: 0000200000000000 RSI: 00002000000000c0 RDI: 0000000000000000
[   89.364578][ T5827] RBP: 00007f24533ee5f0 R08: 0000200000000380 R09: 00005555625224c0
[   89.364587][ T5827] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffb3cfef50
[   89.364595][ T5827] R13: 00007fffb3cff178 R14: 431bde82d7b634db R15: 00007f24533bf03b
[   89.364609][ T5827]  </TASK>
[pid  5827] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5827] exit_group(0)               = ?
[pid  5827] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5827, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=23 /* 0.23 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 5832 attached
, child_tidptr=0x555562521650) = 5832
[pid  5832] set_robust_list(0x555562521660, 24) = 0
[pid  5832] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5832] setpgid(0, 0)               = 0
[pid  5832] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5832] write(3, "1000", 4)         = 4
[pid  5832] close(3)                    = 0
[pid  5832] write(1, "executing program\n", 18executing program
) = 18
[pid  5832] memfd_create("syzkaller", 0) = 3
[pid  5832] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[   89.933205][ T5827] overlayfs: upper fs missing required features.
[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(0x7f244ae00000, 138412032) = 0
[pid  5832] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5832] close(3)                    = 0
[pid  5832] mkdir("./file0", 000)       = 0
[pid  5832] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5832] mkdir("./bus", 000)         = 0
[pid  5832] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5832] exit_group(0)               = ?
[pid  5832] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5832, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=11 /* 0.11 s */} ---
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
 <unfinished ...>
[pid  5833] set_robust_list(0x555562521660, 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 <unfinished ...>
[pid  5826] <... clone resumed>, child_tidptr=0x555562521650) = 5833
[pid  5833] <... openat resumed>)       = 3
[pid  5833] write(3, "1000", 4)         = 4
[pid  5833] close(3executing program
)                    = 0
[pid  5833] write(1, "executing program\n", 18) = 18
[pid  5833] memfd_create("syzkaller", 0) = 3
[pid  5833] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[   90.136355][ T5832] overlayfs: workdir and upperdir must reside under the same mount
[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(0x7f244ae00000, 138412032) = 0
[pid  5833] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5833] close(3)                    = 0
[pid  5833] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5833] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5833] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5833] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5833] exit_group(0)               = ?
[pid  5833] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5833, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=13 /* 0.13 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5834 attached
 <unfinished ...>
[pid  5834] set_robust_list(0x555562521660, 24 <unfinished ...>
[pid  5826] <... clone resumed>, child_tidptr=0x555562521650) = 5834
[pid  5834] <... set_robust_list resumed>) = 0
[pid  5834] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5834] setpgid(0, 0)               = 0
[pid  5834] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5834] write(3, "1000", 4)         = 4
[   90.310791][ T5833] overlayfs: workdir and upperdir must reside under the same mount
[pid  5834] close(3)                    = 0
executing program
[pid  5834] write(1, "executing program\n", 18) = 18
[pid  5834] memfd_create("syzkaller", 0) = 3
[pid  5834] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[pid  5834] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5834] munmap(0x7f244ae00000, 138412032) = 0
[pid  5834] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5834] close(3)                    = 0
[pid  5834] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5834] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5834] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5834] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5834] exit_group(0)               = ?
[pid  5834] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5834, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5836 attached
, child_tidptr=0x555562521650) = 5836
[pid  5836] set_robust_list(0x555562521660, 24) = 0
[pid  5836] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   90.565742][ T5834] overlayfs: workdir and upperdir must reside under the same mount
[pid  5836] setpgid(0, 0)               = 0
[pid  5836] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5836] write(3, "1000", 4)         = 4
[pid  5836] close(3)                    = 0
executing program
[pid  5836] write(1, "executing program\n", 18) = 18
[pid  5836] memfd_create("syzkaller", 0) = 3
[pid  5836] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5836] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5836] close(3)                    = 0
[pid  5836] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5836] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5836] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5836] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5836] exit_group(0)               = ?
[pid  5836] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5836, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5837 attached
, child_tidptr=0x555562521650) = 5837
[   90.878586][ T5836] overlayfs: workdir and upperdir must reside under the same mount
[pid  5837] set_robust_list(0x555562521660, 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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5837] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5837] close(3)                    = 0
[pid  5837] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5837] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5837] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5837] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5837] exit_group(0)               = ?
[pid  5837] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5837, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=12 /* 0.12 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5838 attached
, child_tidptr=0x555562521650) = 5838
[pid  5838] set_robust_list(0x555562521660, 24) = 0
[pid  5838] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5838] setpgid(0, 0)               = 0
[   91.181216][ T5837] overlayfs: workdir and upperdir must reside under the same mount
[pid  5838] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5838] write(3, "1000", 4)         = 4
[pid  5838] close(3)                    = 0
[pid  5838] write(1, "executing program\n", 18executing program
) = 18
[pid  5838] memfd_create("syzkaller", 0) = 3
[pid  5838] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[pid  5838] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5838] munmap(0x7f244ae00000, 138412032) = 0
[pid  5838] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5838] close(3)                    = 0
[pid  5838] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5838] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5838] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5838] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5838] exit_group(0)               = ?
[pid  5838] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5838, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=11 /* 0.11 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5839 attached
, child_tidptr=0x555562521650) = 5839
[   91.493961][ T5838] overlayfs: workdir and upperdir must reside under the same mount
[pid  5839] set_robust_list(0x555562521660, 24) = 0
[pid  5839] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5839] setpgid(0, 0)               = 0
[pid  5839] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5839] write(3, "1000", 4)         = 4
[pid  5839] close(3)                    = 0
executing program
[pid  5839] write(1, "executing program\n", 18) = 18
[pid  5839] memfd_create("syzkaller", 0) = 3
[pid  5839] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5839] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[   91.747092][  T979] cfg80211: failed to load regulatory.db
[pid  5839] close(3)                    = 0
[pid  5839] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5839] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5839] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5839] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5839] exit_group(0)               = ?
[pid  5839] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5839, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=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 5841 attached
, child_tidptr=0x555562521650) = 5841
[pid  5841] set_robust_list(0x555562521660, 24) = 0
[pid  5841] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5841] setpgid(0, 0)               = 0
[pid  5841] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5841] write(3, "1000", 4)         = 4
[pid  5841] close(3)                    = 0
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) = 0x7f244ae00000
[   91.837967][ T5839] overlayfs: workdir and upperdir must reside under the same mount
[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(0x7f244ae00000, 138412032) = 0
[pid  5841] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5841] close(3)                    = 0
[pid  5841] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5841] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5841] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5841] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5841] exit_group(0)               = ?
[pid  5841] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5841, si_uid=0, si_status=0, si_utime=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./strace-static-x86_64: Process 5842 attached
, child_tidptr=0x555562521650) = 5842
[pid  5842] set_robust_list(0x555562521660, 24) = 0
[pid  5842] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   92.076275][ T5841] overlayfs: workdir and upperdir must reside under the same mount
[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
[pid  5842] write(1, "executing program\n", 18executing program
) = 18
[pid  5842] memfd_create("syzkaller", 0) = 3
[pid  5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5842] close(3)                    = 0
[pid  5842] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5842] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5842] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5842] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5842] exit_group(0)               = ?
[pid  5842] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5842, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=12 /* 0.12 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5843 attached
, child_tidptr=0x555562521650) = 5843
[   92.374207][ T5842] overlayfs: workdir and upperdir must reside under the same mount
[pid  5843] set_robust_list(0x555562521660, 24) = 0
[pid  5843] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5843] setpgid(0, 0)               = 0
[pid  5843] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5843] write(3, "1000", 4)         = 4
[pid  5843] close(3executing program
)                    = 0
[pid  5843] write(1, "executing program\n", 18) = 18
[pid  5843] memfd_create("syzkaller", 0) = 3
[pid  5843] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[pid  5843] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5843] munmap(0x7f244ae00000, 138412032) = 0
[pid  5843] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5843] close(3)                    = 0
[pid  5843] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5843] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5843] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5843] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5843] exit_group(0)               = ?
[pid  5843] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5843, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5844 attached
, child_tidptr=0x555562521650) = 5844
[pid  5844] set_robust_list(0x555562521660, 24) = 0
[   92.694344][ T5843] overlayfs: workdir and upperdir must reside under the same mount
[pid  5844] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5844] setpgid(0, 0)               = 0
[pid  5844] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5844] write(3, "1000", 4)         = 4
[pid  5844] close(3)                    = 0
executing program
[pid  5844] write(1, "executing program\n", 18) = 18
[pid  5844] memfd_create("syzkaller", 0) = 3
[pid  5844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[pid  5844] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5844] munmap(0x7f244ae00000, 138412032) = 0
[pid  5844] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5844] close(3)                    = 0
[pid  5844] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5844] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5844] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5844] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5844] exit_group(0)               = ?
[pid  5844] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5844, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5845 attached
, child_tidptr=0x555562521650) = 5845
[pid  5845] set_robust_list(0x555562521660, 24) = 0
[pid  5845] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   92.959823][ T5844] overlayfs: workdir and upperdir must reside under the same mount
[pid  5845] setpgid(0, 0)               = 0
[pid  5845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5845] write(3, "1000", 4)         = 4
[pid  5845] close(3)                    = 0
executing program
[pid  5845] write(1, "executing program\n", 18) = 18
[pid  5845] memfd_create("syzkaller", 0) = 3
[pid  5845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5845] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5845] close(3)                    = 0
[pid  5845] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5845] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5845] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5845] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5845] exit_group(0)               = ?
[pid  5845] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5845, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=13 /* 0.13 s */} ---
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=0x555562521650) = 5846
[pid  5846] set_robust_list(0x555562521660, 24) = 0
[   93.263494][ T5845] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5846] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5846] close(3)                    = 0
[pid  5846] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5846] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5846] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5846] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -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=1 /* 0.01 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 5847 attached
, child_tidptr=0x555562521650) = 5847
[pid  5847] set_robust_list(0x555562521660, 24) = 0
[pid  5847] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5847] setpgid(0, 0)               = 0
[pid  5847] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5847] write(3, "1000", 4)         = 4
[pid  5847] close(3)                    = 0
executing program
[pid  5847] write(1, "executing program\n", 18) = 18
[pid  5847] memfd_create("syzkaller", 0) = 3
[pid  5847] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[   93.559600][ T5846] overlayfs: workdir and upperdir must reside under the same mount
[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(0x7f244ae00000, 138412032) = 0
[pid  5847] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5847] close(3)                    = 0
[pid  5847] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5847] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5847] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5847] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5847] exit_group(0)               = ?
[pid  5847] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5847, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=12 /* 0.12 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5848 attached
, child_tidptr=0x555562521650) = 5848
[pid  5848] set_robust_list(0x555562521660, 24) = 0
[   93.812826][ T5847] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5848] close(3)                    = 0
[pid  5848] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5848] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5848] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5848] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -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=2 /* 0.02 s */, si_stime=13 /* 0.13 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   94.084815][ 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=0x555562521650) = 5849
[pid  5849] set_robust_list(0x555562521660, 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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5849] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5849] close(3)                    = 0
[pid  5849] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5849] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5849] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5849] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5849] exit_group(0)               = ?
[pid  5849] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5849, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=13 /* 0.13 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   94.423069][ T5849] 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=0x555562521650) = 5850
[pid  5850] set_robust_list(0x555562521660, 24) = 0
[pid  5850] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5850] setpgid(0, 0)               = 0
[pid  5850] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5850] write(3, "1000", 4)         = 4
[pid  5850] close(3)                    = 0
[pid  5850] write(1, "executing program\n", 18executing program
) = 18
[pid  5850] memfd_create("syzkaller", 0) = 3
[pid  5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5850] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5850] close(3)                    = 0
[pid  5850] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5850] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5850] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5850] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5850] exit_group(0)               = ?
[pid  5850] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5850, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=14 /* 0.14 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5851 attached
, child_tidptr=0x555562521650) = 5851
[   94.745605][ T5850] overlayfs: workdir and upperdir must reside under the same mount
[pid  5851] set_robust_list(0x555562521660, 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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5851] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5851] close(3)                    = 0
[pid  5851] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5851] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5851] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5851] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5851] exit_group(0)               = ?
[pid  5851] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5851, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=14 /* 0.14 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5853 attached
, child_tidptr=0x555562521650) = 5853
[pid  5853] set_robust_list(0x555562521660, 24) = 0
[pid  5853] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   95.004893][ T5851] overlayfs: workdir and upperdir must reside under the same mount
[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(3executing program
)                    = 0
[pid  5853] write(1, "executing program\n", 18) = 18
[pid  5853] memfd_create("syzkaller", 0) = 3
[pid  5853] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5853] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5853] close(3)                    = 0
[pid  5853] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5853] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5853] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5853] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5853] exit_group(0)               = ?
[pid  5853] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5853, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   95.328750][ 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=0x555562521650) = 5854
[pid  5854] set_robust_list(0x555562521660, 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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5854] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5854] close(3)                    = 0
[pid  5854] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5854] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5854] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5854] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5854] exit_group(0)               = ?
[pid  5854] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5854, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5855 attached
, child_tidptr=0x555562521650) = 5855
[   95.671188][ T5854] overlayfs: workdir and upperdir must reside under the same mount
[pid  5855] set_robust_list(0x555562521660, 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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5855] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5855] close(3)                    = 0
[pid  5855] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5855] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5855] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5855] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5855] exit_group(0)               = ?
[pid  5855] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5855, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   95.973060][ T5855] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5856 attached
, child_tidptr=0x555562521650) = 5856
[pid  5856] set_robust_list(0x555562521660, 24) = 0
[pid  5856] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5856] setpgid(0, 0)               = 0
[pid  5856] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5856] write(3, "1000", 4)         = 4
[pid  5856] close(3)                    = 0
[pid  5856] write(1, "executing program\n", 18executing program
) = 18
[pid  5856] memfd_create("syzkaller", 0) = 3
[pid  5856] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5856] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5856] close(3)                    = 0
[pid  5856] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5856] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5856] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5856] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5856] exit_group(0)               = ?
[pid  5856] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5856, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5857 attached
, child_tidptr=0x555562521650) = 5857
[pid  5857] set_robust_list(0x555562521660, 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
[   96.283352][ T5856] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5857] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5857] close(3)                    = 0
[pid  5857] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5857] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5857] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5857] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5857] exit_group(0)               = ?
[pid  5857] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5857, si_uid=0, si_status=0, si_utime=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./strace-static-x86_64: Process 5858 attached
, child_tidptr=0x555562521650) = 5858
[   96.598666][ T5857] overlayfs: workdir and upperdir must reside under the same mount
[pid  5858] set_robust_list(0x555562521660, 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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5858] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5858] close(3)                    = 0
[pid  5858] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5858] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5858] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5858] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5858] exit_group(0)               = ?
[pid  5858] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5858, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=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=0x555562521650) = 5859
[pid  5859] set_robust_list(0x555562521660, 24) = 0
[   96.906370][ T5858] overlayfs: workdir and upperdir must reside under the same mount
[pid  5859] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5859] setpgid(0, 0)               = 0
[pid  5859] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5859] write(3, "1000", 4)         = 4
[pid  5859] close(3)                    = 0
[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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5859] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5859] close(3)                    = 0
[pid  5859] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5859] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5859] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5859] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5859] exit_group(0)               = ?
[pid  5859] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5859, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=11 /* 0.11 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5860 attached
, child_tidptr=0x555562521650) = 5860
[   97.228267][ T5859] overlayfs: workdir and upperdir must reside under the same mount
[pid  5860] set_robust_list(0x555562521660, 24) = 0
[pid  5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5860] setpgid(0, 0)               = 0
[pid  5860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5860] write(3, "1000", 4)         = 4
[pid  5860] close(3)                    = 0
executing program
[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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5860] close(3)                    = 0
[pid  5860] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5860] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5860] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5860] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5860] exit_group(0)               = ?
[pid  5860] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5860, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=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=0x555562521650) = 5861
[   97.559272][ T5860] overlayfs: workdir and upperdir must reside under the same mount
[pid  5861] set_robust_list(0x555562521660, 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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5861] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5861] close(3)                    = 0
[pid  5861] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5861] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5861] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5861] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5861] exit_group(0)               = ?
[pid  5861] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5861, si_uid=0, si_status=0, si_utime=2 /* 0.02 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 5862 attached
, child_tidptr=0x555562521650) = 5862
[   97.884781][ T5861] overlayfs: workdir and upperdir must reside under the same mount
[pid  5862] set_robust_list(0x555562521660, 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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5862] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5862] close(3)                    = 0
[pid  5862] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5862] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5862] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5862] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5862] exit_group(0)               = ?
[pid  5862] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5862, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=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 5864 attached
, child_tidptr=0x555562521650) = 5864
[   98.154988][ T5862] overlayfs: workdir and upperdir must reside under the same mount
[pid  5864] set_robust_list(0x555562521660, 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
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) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5864] close(3)                    = 0
[pid  5864] mkdir("./file0", 000)       = -1 EEXIST (File exists)
[pid  5864] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5864] mkdir("./bus", 000)         = -1 EEXIST (File exists)
[pid  5864] mount(NULL, "./bus", "overlay", 0, "volatile,workdir=./bus,upperdir=./file1,lowerdir=./file0,") = -1 EINVAL (Invalid argument)
[pid  5864] exit_group(0)               = ?
[pid  5864] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5864, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=12 /* 0.12 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   98.476498][ 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=0x555562521650) = 5865
[pid  5865] set_robust_list(0x555562521660, 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
[pid  5865] write(1, "executing program\n", 18executing program
) = 18
[pid  5865] memfd_create("syzkaller", 0) = 3
[pid  5865] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f244ae00000
[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(0x7f244ae00000, 138412032) = 0
[pid  5865] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)