./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1814897114
<...>
Warning: Permanently added '10.128.0.238' (ED25519) to the list of known hosts.
execve("./syz-executor1814897114", ["./syz-executor1814897114"], 0x7fffa6218fc0 /* 10 vars */) = 0
brk(NULL) = 0x55556dcd1000
brk(0x55556dcd1d00) = 0x55556dcd1d00
arch_prctl(ARCH_SET_FS, 0x55556dcd1380) = 0
set_tid_address(0x55556dcd1650) = 5819
set_robust_list(0x55556dcd1660, 24) = 0
rseq(0x55556dcd1ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor1814897114", 4096) = 28
getrandom("\x6d\xae\xbb\x46\x0d\xbe\xd8\x13", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x55556dcd1d00
brk(0x55556dcf2d00) = 0x55556dcf2d00
brk(0x55556dcf3000) = 0x55556dcf3000
mprotect(0x7fb04345a000, 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, child_tidptr=0x55556dcd1650) = 5820
./strace-static-x86_64: Process 5820 attached
[pid 5820] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5820] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5820] setpgid(0, 0) = 0
[pid 5820] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5820] write(3, "1000", 4) = 4
[pid 5820] close(3) = 0
[pid 5820] write(1, "executing program\n", 18) = 18
executing program
[pid 5820] memfd_create("syzkaller", 0) = 3
[pid 5820] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[pid 5820] 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 5820] munmap(0x7fb03ae00000, 138412032) = 0
[pid 5820] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5820] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5820] close(3) = 0
[pid 5820] close(4) = 0
[pid 5820] mkdir("./file1", 0777) = 0
syzkaller login: [ 73.930588][ T5820] loop0: detected capacity change from 0 to 32768
[ 73.963169][ T5820] =======================================================
[ 73.963169][ T5820] WARNING: The mand mount option has been deprecated and
[ 73.963169][ T5820] and is ignored by this kernel. Remove the mand
[ 73.963169][ T5820] option from the mount to silence this warning.
[ 73.963169][ T5820] =======================================================
[ 74.010394][ T5820] JBD2: Ignoring recovery information on journal
[pid 5820] 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 5820] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid 5820] chdir("./file1") = 0
[pid 5820] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5820] mkdirat(AT_FDCWD, "./file1", 000) = 0
[pid 5820] mkdirat(AT_FDCWD, "./file0", 000) = 0
[pid 5820] mkdir("./bus", 000) = 0
[ 74.037514][ T5820] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
[ 74.083843][ T5820] overlayfs: upper fs does not support tmpfile.
[ 74.091956][ T5820] overlayfs: upper fs does not support RENAME_WHITEOUT.
[ 74.099336][ T5820]
[ 74.101664][ T5820] ======================================================
[ 74.108662][ T5820] WARNING: possible circular locking dependency detected
[ 74.115671][ T5820] 6.15.0-rc7-syzkaller-00099-g94305e83eccb #0 Not tainted
[ 74.122759][ T5820] ------------------------------------------------------
[ 74.129755][ T5820] syz-executor181/5820 is trying to acquire lock:
[ 74.136147][ T5820] ffff888075b342c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 74.149654][ T5820]
[ 74.149654][ T5820] but task is already holding lock:
[ 74.156999][ T5820] ffff888075b39538 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[ 74.166463][ T5820]
[ 74.166463][ T5820] which lock already depends on the new lock.
[ 74.166463][ T5820]
[ 74.176848][ T5820]
[ 74.176848][ T5820] the existing dependency chain (in reverse order) is:
[ 74.185842][ T5820]
[ 74.185842][ T5820] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}:
[ 74.193645][ T5820] lock_acquire+0x120/0x360
[ 74.198658][ T5820] down_write+0x96/0x1f0
[ 74.203421][ T5820] ocfs2_xattr_set_handle+0x3b0/0x7a0
[ 74.209297][ T5820] ocfs2_init_security_set+0xbd/0xe0
[ 74.215085][ T5820] ocfs2_mknod+0x137f/0x2050
[ 74.220183][ T5820] ocfs2_mkdir+0x191/0x440
[ 74.225103][ T5820] vfs_mkdir+0x303/0x510
[ 74.229848][ T5820] do_mkdirat+0x247/0x590
[ 74.234685][ T5820] __x64_sys_mkdirat+0x87/0xa0
[ 74.239964][ T5820] do_syscall_64+0xf6/0x210
[ 74.244979][ T5820] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 74.251378][ T5820]
[ 74.251378][ T5820] -> #3 (jbd2_handle){.+.+}-{0:0}:
[ 74.258662][ T5820] lock_acquire+0x120/0x360
[ 74.263673][ T5820] start_this_handle+0x1fa7/0x21c0
[ 74.269292][ T5820] jbd2__journal_start+0x2c1/0x5b0
[ 74.274911][ T5820] jbd2_journal_start+0x2a/0x40
[ 74.280272][ T5820] ocfs2_start_trans+0x376/0x6d0
[ 74.285717][ T5820] ocfs2_reserve_suballoc_bits+0x711/0x4640
[ 74.292114][ T5820] ocfs2_reserve_new_metadata_blocks+0x403/0x940
[ 74.298950][ T5820] ocfs2_mknod+0xe08/0x2050
[ 74.303961][ T5820] ocfs2_mkdir+0x191/0x440
[ 74.308886][ T5820] vfs_mkdir+0x303/0x510
[ 74.313636][ T5820] do_mkdirat+0x247/0x590
[ 74.318470][ T5820] __x64_sys_mkdirat+0x87/0xa0
[ 74.323740][ T5820] do_syscall_64+0xf6/0x210
[ 74.328746][ T5820] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 74.335146][ T5820]
[ 74.335146][ T5820] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
[ 74.343647][ T5820] lock_acquire+0x120/0x360
[ 74.348656][ T5820] down_read+0x46/0x2e0
[ 74.353320][ T5820] ocfs2_start_trans+0x36a/0x6d0
[ 74.358759][ T5820] ocfs2_reserve_suballoc_bits+0x711/0x4640
[ 74.365156][ T5820] ocfs2_reserve_new_metadata_blocks+0x403/0x940
[ 74.371986][ T5820] ocfs2_mknod+0xe08/0x2050
[ 74.377011][ T5820] ocfs2_mkdir+0x191/0x440
[ 74.381947][ T5820] vfs_mkdir+0x303/0x510
[ 74.386707][ T5820] do_mkdirat+0x247/0x590
[ 74.391549][ T5820] __x64_sys_mkdirat+0x87/0xa0
[ 74.396844][ T5820] do_syscall_64+0xf6/0x210
[ 74.401868][ T5820] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 74.408273][ T5820]
[ 74.408273][ T5820] -> #1 (sb_internal#2){.+.+}-{0:0}:
[ 74.415741][ T5820] lock_acquire+0x120/0x360
[ 74.420757][ T5820] ocfs2_start_trans+0x26b/0x6d0
[ 74.426202][ T5820] ocfs2_mknod+0xe93/0x2050
[ 74.431218][ T5820] ocfs2_mkdir+0x191/0x440
[ 74.436151][ T5820] vfs_mkdir+0x303/0x510
[ 74.440904][ T5820] do_mkdirat+0x247/0x590
[ 74.445738][ T5820] __x64_sys_mkdirat+0x87/0xa0
[ 74.451008][ T5820] do_syscall_64+0xf6/0x210
[ 74.456018][ T5820] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 74.462416][ T5820]
[ 74.462416][ T5820] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}:
[ 74.472923][ T5820] validate_chain+0xb9b/0x2140
[ 74.478199][ T5820] __lock_acquire+0xaac/0xd20
[ 74.483381][ T5820] lock_acquire+0x120/0x360
[ 74.488388][ T5820] down_write+0x96/0x1f0
[ 74.493137][ T5820] ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 74.499799][ T5820] ocfs2_reserve_clusters_with_limit+0x1be/0xba0
[ 74.506628][ T5820] ocfs2_init_xattr_set_ctxt+0x376/0x700
[ 74.512764][ T5820] ocfs2_xattr_set+0xb70/0x11f0
[ 74.518118][ T5820] __vfs_setxattr+0x439/0x480
[ 74.523303][ T5820] __vfs_setxattr_noperm+0x12d/0x660
[ 74.529097][ T5820] vfs_setxattr+0x16b/0x2f0
[ 74.534107][ T5820] ovl_get_workdir+0xb86/0x1700
[ 74.539466][ T5820] ovl_fill_super+0x1386/0x35d0
[ 74.544829][ T5820] get_tree_nodev+0xbb/0x150
[ 74.549927][ T5820] vfs_get_tree+0x92/0x2b0
[ 74.554850][ T5820] do_new_mount+0x24a/0xa40
[ 74.559858][ T5820] __se_sys_mount+0x317/0x410
[ 74.565037][ T5820] do_syscall_64+0xf6/0x210
[ 74.570048][ T5820] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 74.576447][ T5820]
[ 74.576447][ T5820] other info that might help us debug this:
[ 74.576447][ T5820]
[ 74.586656][ T5820] Chain exists of:
[ 74.586656][ T5820] &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> jbd2_handle --> &oi->ip_xattr_sem
[ 74.586656][ T5820]
[ 74.602377][ T5820] Possible unsafe locking scenario:
[ 74.602377][ T5820]
[ 74.609806][ T5820] CPU0 CPU1
[ 74.615150][ T5820] ---- ----
[ 74.620495][ T5820] lock(&oi->ip_xattr_sem);
[ 74.625070][ T5820] lock(jbd2_handle);
[ 74.631640][ T5820] lock(&oi->ip_xattr_sem);
[ 74.638732][ T5820] lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
[ 74.646004][ T5820]
[ 74.646004][ T5820] *** DEADLOCK ***
[ 74.646004][ T5820]
[ 74.654125][ T5820] 4 locks held by syz-executor181/5820:
[ 74.659649][ T5820] #0: ffff8880344100e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970
[ 74.669739][ T5820] #1: ffff888023490420 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
[ 74.678868][ T5820] #2: ffff888075b39800 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0
[ 74.689300][ T5820] #3: ffff888075b39538 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0
[ 74.699200][ T5820]
[ 74.699200][ T5820] stack backtrace:
[ 74.705093][ T5820] CPU: 0 UID: 0 PID: 5820 Comm: syz-executor181 Not tainted 6.15.0-rc7-syzkaller-00099-g94305e83eccb #0 PREEMPT(full)
[ 74.705121][ T5820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[ 74.705142][ T5820] Call Trace:
[ 74.705150][ T5820]
[ 74.705159][ T5820] dump_stack_lvl+0x189/0x250
[ 74.705177][ T5820] ? __pfx_dump_stack_lvl+0x10/0x10
[ 74.705192][ T5820] ? __pfx__printk+0x10/0x10
[ 74.705210][ T5820] ? print_lock_name+0xde/0x100
[ 74.705229][ T5820] print_circular_bug+0x2ee/0x310
[ 74.705243][ T5820] check_noncircular+0x134/0x160
[ 74.705256][ T5820] validate_chain+0xb9b/0x2140
[ 74.705274][ T5820] ? __mutex_unlock_slowpath+0x1cd/0x700
[ 74.705291][ T5820] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 74.705309][ T5820] __lock_acquire+0xaac/0xd20
[ 74.705325][ T5820] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 74.705342][ T5820] lock_acquire+0x120/0x360
[ 74.705356][ T5820] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 74.705373][ T5820] ? is_bpf_text_address+0x292/0x2b0
[ 74.705388][ T5820] ? is_bpf_text_address+0x26/0x2b0
[ 74.705405][ T5820] down_write+0x96/0x1f0
[ 74.705419][ T5820] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 74.705435][ T5820] ? __pfx_down_write+0x10/0x10
[ 74.705450][ T5820] ? arch_stack_walk+0xfc/0x150
[ 74.705475][ T5820] ocfs2_reserve_local_alloc_bits+0x125/0x24e0
[ 74.705492][ T5820] ? stack_trace_save+0x9c/0xe0
[ 74.705504][ T5820] ? __pfx_stack_trace_save+0x10/0x10
[ 74.705517][ T5820] ? check_path+0x21/0x40
[ 74.705526][ T5820] ? check_noncircular+0xe0/0x160
[ 74.705538][ T5820] ? lockdep_unlock+0x89/0x120
[ 74.705552][ T5820] ? validate_chain+0x897/0x2140
[ 74.705568][ T5820] ? __pfx_ocfs2_reserve_local_alloc_bits+0x10/0x10
[ 74.705584][ T5820] ? do_new_mount+0x24a/0xa40
[ 74.705606][ T5820] ? __lock_acquire+0xaac/0xd20
[ 74.705626][ T5820] ? do_raw_spin_unlock+0x122/0x240
[ 74.705639][ T5820] ? _raw_spin_unlock+0x28/0x50
[ 74.705651][ T5820] ? ocfs2_alloc_should_use_local+0x152/0x310
[ 74.705666][ T5820] ? ocfs2_reserve_clusters_with_limit+0x16b/0xba0
[ 74.705679][ T5820] ocfs2_reserve_clusters_with_limit+0x1be/0xba0
[ 74.705694][ T5820] ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10
[ 74.705709][ T5820] ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10
[ 74.705726][ T5820] ? __lock_acquire+0xaac/0xd20
[ 74.705743][ T5820] ocfs2_init_xattr_set_ctxt+0x376/0x700
[ 74.705759][ T5820] ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10
[ 74.705774][ T5820] ? ocfs2_xattr_set+0xb36/0x11f0
[ 74.705788][ T5820] ? up_write+0x1c4/0x420
[ 74.705798][ T5820] ? ocfs2_xattr_set+0x334/0x11f0
[ 74.705811][ T5820] ocfs2_xattr_set+0xb70/0x11f0
[ 74.705831][ T5820] ? __pfx_ocfs2_xattr_set+0x10/0x10
[ 74.705843][ T5820] ? up+0xde/0x150
[ 74.705859][ T5820] ? smack_log+0xef/0x3f0
[ 74.705877][ T5820] ? __pfx___console_unlock+0x10/0x10
[ 74.705888][ T5820] ? smk_access+0x14c/0x4e0
[ 74.705905][ T5820] ? smk_tskacc+0x2fc/0x370
[ 74.705923][ T5820] ? posix_xattr_acl+0x93/0xc0
[ 74.705939][ T5820] ? evm_protect_xattr+0x4d4/0xa90
[ 74.705955][ T5820] ? __pfx_evm_protect_xattr+0x10/0x10
[ 74.705969][ T5820] ? safesetid_security_capable+0xa9/0x1a0
[ 74.705983][ T5820] ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10
[ 74.705996][ T5820] __vfs_setxattr+0x439/0x480
[ 74.706017][ T5820] __vfs_setxattr_noperm+0x12d/0x660
[ 74.706036][ T5820] vfs_setxattr+0x16b/0x2f0
[ 74.706055][ T5820] ? __pfx_vfs_setxattr+0x10/0x10
[ 74.706071][ T5820] ? up_write+0x1c4/0x420
[ 74.706084][ T5820] ovl_get_workdir+0xb86/0x1700
[ 74.706102][ T5820] ? __pfx_ovl_get_workdir+0x10/0x10
[ 74.706125][ T5820] ? do_raw_spin_unlock+0x122/0x240
[ 74.706138][ T5820] ? _raw_spin_unlock+0x28/0x50
[ 74.706149][ T5820] ? ovl_inuse_trylock+0xae/0xf0
[ 74.706165][ T5820] ovl_fill_super+0x1386/0x35d0
[ 74.706183][ T5820] ? rcu_is_watching+0x15/0xb0
[ 74.706202][ T5820] ? shrinker_register+0x124/0x230
[ 74.706220][ T5820] ? __pfx_ovl_fill_super+0x10/0x10
[ 74.706235][ T5820] ? __pfx___mutex_lock+0x10/0x10
[ 74.706249][ T5820] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 74.706265][ T5820] ? __raw_spin_lock_init+0x45/0x100
[ 74.706282][ T5820] ? sget_fc+0x962/0xa40
[ 74.706296][ T5820] ? __pfx_set_anon_super_fc+0x10/0x10
[ 74.706311][ T5820] ? __pfx_ovl_fill_super+0x10/0x10
[ 74.706326][ T5820] get_tree_nodev+0xbb/0x150
[ 74.706341][ T5820] vfs_get_tree+0x92/0x2b0
[ 74.706357][ T5820] do_new_mount+0x24a/0xa40
[ 74.706376][ T5820] __se_sys_mount+0x317/0x410
[ 74.706389][ T5820] ? __pfx___se_sys_mount+0x10/0x10
[ 74.706401][ T5820] ? __x64_sys_mount+0x20/0xc0
[ 74.706412][ T5820] do_syscall_64+0xf6/0x210
[ 74.706427][ T5820] ? clear_bhb_loop+0x60/0xb0
[ 74.706441][ T5820] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 74.706453][ T5820] RIP: 0033:0x7fb0433e2bd9
[ 74.706475][ T5820] 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
[ 74.706486][ T5820] RSP: 002b:00007ffe672aa678 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 74.706499][ T5820] RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007fb0433e2bd9
[ 74.706508][ T5820] RDX: 0000200000000000 RSI: 0000200000006200 RDI: 0000000000000000
[ 74.706516][ T5820] RBP: 00007fb04345a5f0 R08: 0000200000000400 R09: 000055556dcd24c0
[ 74.706525][ T5820] R10: 0000000000004002 R11: 0000000000000246 R12: 00007ffe672aa6a0
[ 74.706533][ T5820] R13: 00007ffe672aa8c8 R14: 431bde82d7b634db R15: 00007fb04342b03b
[ 74.706546][ T5820]
[pid 5820] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5820] exit_group(0) = ?
[pid 5820] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5820, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=20 /* 0.20 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 5824 attached
, child_tidptr=0x55556dcd1650) = 5824
[pid 5824] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5824] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5824] setpgid(0, 0) = 0
[pid 5824] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5824] write(3, "1000", 4) = 4
[pid 5824] close(3) = 0
[pid 5824] write(1, "executing program\n", 18executing program
[ 75.234989][ T5820] overlayfs: upper fs missing required features.
) = 18
[pid 5824] memfd_create("syzkaller", 0) = 3
[pid 5824] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[pid 5824] 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 5824] munmap(0x7fb03ae00000, 138412032) = 0
[pid 5824] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5824] close(3) = 0
[pid 5824] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5824] mkdirat(AT_FDCWD, "./file0", 000) = 0
[pid 5824] mkdir("./bus", 000) = 0
[pid 5824] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5824] exit_group(0) = ?
[pid 5824] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5824, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=11 /* 0.11 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5825 attached
, child_tidptr=0x55556dcd1650) = 5825
[pid 5825] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5825] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5825] setpgid(0, 0) = 0
[pid 5825] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5825] write(3, "1000", 4) = 4
[pid 5825] close(3) = 0
[pid 5825] write(1, "executing program\n", 18executing program
) = 18
[pid 5825] memfd_create("syzkaller", 0) = 3
[pid 5825] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[ 75.411060][ T5824] overlayfs: workdir and upperdir must reside under the same mount
[pid 5825] 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 5825] munmap(0x7fb03ae00000, 138412032) = 0
[pid 5825] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5825] close(3) = 0
[pid 5825] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5825] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5825] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5825] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5825] exit_group(0) = ?
[pid 5825] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5825, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=8 /* 0.08 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 5826 attached
, child_tidptr=0x55556dcd1650) = 5826
[pid 5826] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5826] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5826] setpgid(0, 0) = 0
[pid 5826] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5826] write(3, "1000", 4) = 4
[pid 5826] close(3) = 0
executing program
[pid 5826] write(1, "executing program\n", 18) = 18
[pid 5826] memfd_create("syzkaller", 0) = 3
[pid 5826] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[ 75.615018][ T5825] overlayfs: workdir and upperdir must reside under the same mount
[pid 5826] 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 5826] munmap(0x7fb03ae00000, 138412032) = 0
[pid 5826] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5826] close(3) = 0
[pid 5826] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5826] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5826] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5826] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5826] exit_group(0) = ?
[pid 5826] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5826, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5827 attached
, child_tidptr=0x55556dcd1650) = 5827
[pid 5827] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5827] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5827] setpgid(0, 0) = 0
[pid 5827] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5827] write(3, "1000", 4) = 4
[pid 5827] close(3) = 0
executing program
[pid 5827] write(1, "executing program\n", 18) = 18
[pid 5827] memfd_create("syzkaller", 0) = 3
[pid 5827] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[ 75.772647][ T5826] overlayfs: workdir and upperdir must reside under the same mount
[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(0x7fb03ae00000, 138412032) = 0
[pid 5827] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5827] close(3) = 0
[pid 5827] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5827] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5827] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5827] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=4 /* 0.04 s */, si_stime=7 /* 0.07 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55556dcd1650) = 5828
./strace-static-x86_64: Process 5828 attached
[ 75.968629][ T5827] overlayfs: workdir and upperdir must reside under the same mount
[pid 5828] set_robust_list(0x55556dcd1660, 24) = 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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 138412032) = 0
[pid 5828] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5828] close(3) = 0
[pid 5828] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5828] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5828] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5828] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5828] exit_group(0) = ?
[pid 5828] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5828, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=8 /* 0.08 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 5829 attached
[pid 5829] set_robust_list(0x55556dcd1660, 24
[pid 5819] <... clone resumed>, child_tidptr=0x55556dcd1650) = 5829
[pid 5829] <... set_robust_list resumed>) = 0
[pid 5829] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5829] setpgid(0, 0) = 0
[ 76.273144][ T5828] overlayfs: workdir and upperdir must reside under the same mount
[pid 5829] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5829] write(3, "1000", 4) = 4
[pid 5829] close(3) = 0
executing program
[pid 5829] write(1, "executing program\n", 18) = 18
[pid 5829] memfd_create("syzkaller", 0) = 3
[pid 5829] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[pid 5829] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid 5829] munmap(0x7fb03ae00000, 138412032) = 0
[pid 5829] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5829] close(3) = 0
[pid 5829] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5829] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5829] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5829] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5829] exit_group(0) = ?
[pid 5829] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5829, si_uid=0, si_status=0, si_utime=1 /* 0.01 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 5830 attached
, child_tidptr=0x55556dcd1650) = 5830
[pid 5830] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5830] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 76.513193][ T5829] overlayfs: workdir and upperdir must reside under the same mount
[pid 5830] setpgid(0, 0) = 0
[pid 5830] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5830] write(3, "1000", 4) = 4
[pid 5830] close(3) = 0
[pid 5830] write(1, "executing program\n", 18executing program
) = 18
[pid 5830] memfd_create("syzkaller", 0) = 3
[pid 5830] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[pid 5830] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid 5830] munmap(0x7fb03ae00000, 138412032) = 0
[pid 5830] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5830] close(3) = 0
[pid 5830] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5830] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5830] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5830] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5830] exit_group(0) = ?
[pid 5830] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5830, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=8 /* 0.08 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5831 attached
, child_tidptr=0x55556dcd1650) = 5831
[pid 5831] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5831] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 76.773848][ T5830] overlayfs: workdir and upperdir must reside under the same mount
[pid 5831] setpgid(0, 0) = 0
[pid 5831] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5831] write(3, "1000", 4) = 4
[pid 5831] close(3) = 0
executing program
[pid 5831] write(1, "executing program\n", 18) = 18
[pid 5831] memfd_create("syzkaller", 0) = 3
[pid 5831] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[pid 5831] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid 5831] munmap(0x7fb03ae00000, 138412032) = 0
[pid 5831] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5831] close(3) = 0
[pid 5831] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5831] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5831] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5831] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5831] exit_group(0) = ?
[pid 5831] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5831, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 77.015456][ T5831] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55556dcd1650) = 5832
./strace-static-x86_64: Process 5832 attached
[pid 5832] set_robust_list(0x55556dcd1660, 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
executing program
[pid 5832] write(1, "executing program\n", 18) = 18
[pid 5832] memfd_create("syzkaller", 0) = 3
[pid 5832] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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) = -1 EEXIST (File exists)
[pid 5832] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5832] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5833 attached
[pid 5833] set_robust_list(0x55556dcd1660, 24
[pid 5819] <... clone resumed>, child_tidptr=0x55556dcd1650) = 5833
[pid 5833] <... set_robust_list resumed>) = 0
[pid 5833] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 77.287350][ T5832] overlayfs: workdir and upperdir must reside under the same mount
[pid 5833] setpgid(0, 0) = 0
[pid 5833] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5833] write(3, "1000", 4) = 4
[pid 5833] close(3) = 0
executing program
[pid 5833] write(1, "executing program\n", 18) = 18
[pid 5833] memfd_create("syzkaller", 0) = 3
[pid 5833] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=3 /* 0.03 s */, si_stime=7 /* 0.07 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 5834 attached
[pid 5834] set_robust_list(0x55556dcd1660, 24) = 0
[ 77.556636][ T5833] overlayfs: workdir and upperdir must reside under the same mount
[pid 5819] <... clone resumed>, child_tidptr=0x55556dcd1650) = 5834
[pid 5834] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5834] setpgid(0, 0) = 0
[pid 5834] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5834] write(3, "1000", 4) = 4
[pid 5834] close(3) = 0
[pid 5834] write(1, "executing program\n", 18executing program
) = 18
[pid 5834] memfd_create("syzkaller", 0) = 3
[pid 5834] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 138412032) = 0
[pid 5834] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5834] close(3) = 0
[pid 5834] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5834] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5834] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5834] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=10 /* 0.10 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5836 attached
[pid 5836] set_robust_list(0x55556dcd1660, 24
[pid 5819] <... clone resumed>, child_tidptr=0x55556dcd1650) = 5836
[pid 5836] <... set_robust_list resumed>) = 0
[pid 5836] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5836] setpgid(0, 0) = 0
[pid 5836] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5836] write(3, "1000", 4) = 4
[pid 5836] close(3) = 0
[pid 5836] write(1, "executing program\n", 18executing program
) = 18
[pid 5836] memfd_create("syzkaller", 0) = 3
[pid 5836] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[ 77.824231][ T5834] overlayfs: workdir and upperdir must reside under the same mount
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5837 attached
, child_tidptr=0x55556dcd1650) = 5837
[ 78.038162][ T5836] overlayfs: workdir and upperdir must reside under the same mount
[pid 5837] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5837] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5837] setpgid(0, 0) = 0
[pid 5837] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5837] write(3, "1000", 4) = 4
[pid 5837] close(3) = 0
[pid 5837] write(1, "executing program\n", 18executing program
) = 18
[pid 5837] memfd_create("syzkaller", 0) = 3
[pid 5837] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=4 /* 0.04 s */, si_stime=8 /* 0.08 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 5839 attached
, child_tidptr=0x55556dcd1650) = 5839
[pid 5839] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5839] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 78.325482][ T5837] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5839] exit_group(0) = ?
[pid 5839] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5839, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=8 /* 0.08 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
[pid 5841] set_robust_list(0x55556dcd1660, 24
[pid 5819] <... clone resumed>, child_tidptr=0x55556dcd1650) = 5841
[pid 5841] <... set_robust_list resumed>) = 0
[pid 5841] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5841] setpgid(0, 0) = 0
[pid 5841] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5841] write(3, "1000", 4) = 4
[pid 5841] close(3) = 0
[pid 5841] write(1, "executing program\n", 18executing program
[ 78.596867][ T5839] overlayfs: workdir and upperdir must reside under the same mount
) = 18
[pid 5841] memfd_create("syzkaller", 0) = 3
[pid 5841] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 138412032) = 0
[pid 5841] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5841] close(3) = 0
[pid 5841] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5841] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5841] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5841] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5841] exit_group(0) = ?
[pid 5841] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5841, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=7 /* 0.07 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 5842 attached
, child_tidptr=0x55556dcd1650) = 5842
[ 78.847608][ T5841] overlayfs: workdir and upperdir must reside under the same mount
[pid 5842] set_robust_list(0x55556dcd1660, 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
[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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5842] exit_group(0) = ?
[pid 5842] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5842, si_uid=0, si_status=0, si_utime=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 5844 attached
, child_tidptr=0x55556dcd1650) = 5844
[pid 5844] set_robust_list(0x55556dcd1660, 24) = 0
[ 79.121149][ T5842] 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
[pid 5844] write(1, "executing program\n", 18executing program
) = 18
[pid 5844] memfd_create("syzkaller", 0) = 3
[pid 5844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 138412032) = 0
[pid 5844] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5844] close(3) = 0
[pid 5844] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5844] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5844] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5844] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -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=8 /* 0.08 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 79.383203][ T5844] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55556dcd1650) = 5845
./strace-static-x86_64: Process 5845 attached
[pid 5845] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5845] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5845] setpgid(0, 0) = 0
[pid 5845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5845] write(3, "1000", 4) = 4
[pid 5845] close(3) = 0
executing program
[pid 5845] write(1, "executing program\n", 18) = 18
[pid 5845] memfd_create("syzkaller", 0) = 3
[pid 5845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5845] exit_group(0) = ?
[pid 5845] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5845, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 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=0x55556dcd1650) = 5847
[pid 5847] set_robust_list(0x55556dcd1660, 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) = 0x7fb03ae00000
[ 79.697415][ T5845] 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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5847] exit_group(0) = ?
[pid 5847] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5847, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=9 /* 0.09 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=0x55556dcd1650) = 5848
[pid 5848] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 79.887307][ T5847] overlayfs: workdir and upperdir must reside under the same mount
[pid 5848] setpgid(0, 0) = 0
[pid 5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5848] write(3, "1000", 4) = 4
[pid 5848] close(3) = 0
[pid 5848] write(1, "executing program\n", 18executing program
) = 18
[pid 5848] memfd_create("syzkaller", 0) = 3
[pid 5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5848] exit_group(0) = ?
[pid 5848] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5848, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 80.119475][ T5848] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55556dcd1650) = 5850
./strace-static-x86_64: Process 5850 attached
[pid 5850] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5850] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5850] setpgid(0, 0) = 0
[pid 5850] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5850] write(3, "1000", 4) = 4
[pid 5850] close(3) = 0
executing program
[pid 5850] write(1, "executing program\n", 18) = 18
[pid 5850] memfd_create("syzkaller", 0) = 3
[pid 5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 138412032) = 0
[pid 5850] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5850] close(3) = 0
[pid 5850] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5850] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5850] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5850] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5850] exit_group(0) = ?
[pid 5850] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5850, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
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=0x55556dcd1650) = 5851
./strace-static-x86_64: Process 5851 attached
[pid 5851] set_robust_list(0x55556dcd1660, 24) = 0
[ 80.480839][ T5850] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5851] exit_group(0) = ?
[pid 5851] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5851, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5852 attached
, child_tidptr=0x55556dcd1650) = 5852
[pid 5852] set_robust_list(0x55556dcd1660, 24) = 0
[ 80.761498][ T5851] overlayfs: workdir and upperdir must reside under the same mount
[pid 5852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5852] setpgid(0, 0) = 0
[pid 5852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5852] write(3, "1000", 4) = 4
[pid 5852] close(3) = 0
[pid 5852] write(1, "executing program\n", 18executing program
) = 18
[pid 5852] memfd_create("syzkaller", 0) = 3
[pid 5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5852] exit_group(0) = ?
[pid 5852] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5852, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 81.007762][ T5852] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55556dcd1650) = 5853
./strace-static-x86_64: Process 5853 attached
[pid 5853] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5853] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5853] setpgid(0, 0) = 0
[pid 5853] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5853] write(3, "1000", 4) = 4
[pid 5853] close(3) = 0
executing program
[pid 5853] write(1, "executing program\n", 18) = 18
[pid 5853] memfd_create("syzkaller", 0) = 3
[pid 5853] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5853] exit_group(0) = ?
[pid 5853] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5853, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=8 /* 0.08 s */} ---
[ 81.342717][ T5853] 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 5854 attached
, child_tidptr=0x55556dcd1650) = 5854
[pid 5854] set_robust_list(0x55556dcd1660, 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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5854] exit_group(0) = ?
[pid 5854] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5854, si_uid=0, si_status=0, si_utime=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 5855 attached
, child_tidptr=0x55556dcd1650) = 5855
[pid 5855] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5855] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5855] setpgid(0, 0) = 0
[ 81.627706][ T5854] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5855] exit_group(0) = ?
[pid 5855] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5855, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=10 /* 0.10 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5856 attached
, child_tidptr=0x55556dcd1650) = 5856
[pid 5856] set_robust_list(0x55556dcd1660, 24) = 0
[ 81.886587][ T5855] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5856] exit_group(0) = ?
[pid 5856] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5856, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5857 attached
, child_tidptr=0x55556dcd1650) = 5857
[pid 5857] set_robust_list(0x55556dcd1660, 24) = 0
[ 82.162195][ T5856] overlayfs: workdir and upperdir must reside under the same mount
[pid 5857] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5857] setpgid(0, 0) = 0
[pid 5857] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5857] write(3, "1000", 4) = 4
[pid 5857] close(3) = 0
executing program
[pid 5857] write(1, "executing program\n", 18) = 18
[pid 5857] memfd_create("syzkaller", 0) = 3
[pid 5857] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5857] exit_group(0) = ?
[pid 5857] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5857, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 82.405606][ T5857] 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 5858 attached
, child_tidptr=0x55556dcd1650) = 5858
[pid 5858] set_robust_list(0x55556dcd1660, 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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5858] exit_group(0) = ?
[pid 5858] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5858, si_uid=0, si_status=0, si_utime=4 /* 0.04 s */, si_stime=8 /* 0.08 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5859 attached
[pid 5859] set_robust_list(0x55556dcd1660, 24
[pid 5819] <... clone resumed>, child_tidptr=0x55556dcd1650) = 5859
[pid 5859] <... set_robust_list resumed>) = 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
[ 82.778224][ T5858] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5859] exit_group(0) = ?
[pid 5859] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5859, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 83.023020][ T5859] 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 5860 attached
, child_tidptr=0x55556dcd1650) = 5860
[pid 5860] set_robust_list(0x55556dcd1660, 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
[pid 5860] write(1, "executing program\n", 18executing program
) = 18
[pid 5860] memfd_create("syzkaller", 0) = 3
[pid 5860] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 138412032) = 0
[pid 5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5860] close(3) = 0
[pid 5860] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid 5860] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid 5860] mkdir("./bus", 000) = -1 EEXIST (File exists)
[pid 5860] mount(NULL, "./bus", "overlay", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5860] exit_group(0) = ?
[pid 5860] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5860, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=11 /* 0.11 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 83.344204][ T5860] overlayfs: workdir and upperdir must reside under the same mount
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55556dcd1650) = 5861
./strace-static-x86_64: Process 5861 attached
[pid 5861] set_robust_list(0x55556dcd1660, 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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5861] exit_group(0) = ?
[pid 5861] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5861, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=11 /* 0.11 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55556dcd1650) = 5862
./strace-static-x86_64: Process 5862 attached
[pid 5862] set_robust_list(0x55556dcd1660, 24) = 0
[ 83.630883][ T5861] overlayfs: workdir and upperdir must reside under the same mount
[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) = 0x7fb03ae00000
[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(0x7fb03ae00000, 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", MS_NOSUID|MS_REC, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid 5862] exit_group(0) = ?
[pid 5862] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5862, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5863 attached
, child_tidptr=0x55556dcd1650) = 5863
[pid 5863] set_robust_list(0x55556dcd1660, 24) = 0
[pid 5863] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[ 83.864513][ T5862] overlayfs: workdir and upperdir must reside under the same mount
[pid 5863] setpgid(0, 0) = 0
[pid 5863] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5863] write(3, "1000", 4) = 4
[pid 5863] close(3) = 0
executing program
[pid 5863] write(1, "executing program\n", 18) = 18
[pid 5863] memfd_create("syzkaller", 0) = 3
[pid 5863] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb03ae00000
[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(0x7fb03ae00000, 138412032) = 0
[pid 5863] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)