./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3032846614

<...>
Warning: Permanently added '10.128.1.43' (ED25519) to the list of known hosts.
execve("./syz-executor3032846614", ["./syz-executor3032846614"], 0x7fff651ee9f0 /* 10 vars */) = 0
brk(NULL)                               = 0x555592081000
brk(0x555592081d40)                     = 0x555592081d40
arch_prctl(ARCH_SET_FS, 0x5555920813c0) = 0
set_tid_address(0x555592081690)         = 5820
set_robust_list(0x5555920816a0, 24)     = 0
rseq(0x555592081ce0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor3032846614", 4096) = 28
getrandom("\x09\x24\xc7\x60\xca\x41\xb9\x5b", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555592081d40
brk(0x5555920a2d40)                     = 0x5555920a2d40
brk(0x5555920a3000)                     = 0x5555920a3000
mprotect(0x7fcc24d11000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
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 5822 attached
, child_tidptr=0x555592081690) = 5822
[pid  5822] set_robust_list(0x5555920816a0, 24) = 0
[pid  5822] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5822] setpgid(0, 0)               = 0
[pid  5822] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5822] write(3, "1000", 4)         = 4
[pid  5822] close(3)                    = 0
executing program
[pid  5822] write(1, "executing program\n", 18) = 18
[pid  5822] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5822] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5822] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5822] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5822] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5822] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5822] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5823 attached
 <unfinished ...>
[pid  5823] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5822] <... clone3 resumed> => {parent_tid=[5823]}, 88) = 5823
[pid  5823] set_robust_list(0x7fcc24c439a0, 24) = 0
[pid  5822] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5823] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5822] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5823] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5822] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5822] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5823] memfd_create("syzkaller", 0) = 3
[pid  5823] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[pid  5823] 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  5823] munmap(0x7fcc1c800000, 138412032) = 0
[pid  5823] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5823] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5823] close(3)                    = 0
[pid  5823] close(4)                    = 0
[pid  5823] mkdir("./file1", 0777)      = 0
[   64.781624][ T5823] loop0: detected capacity change from 0 to 32768
[   64.828138][ T5823] =======================================================
[   64.828138][ T5823] WARNING: The mand mount option has been deprecated and
[   64.828138][ T5823]          and is ignored by this kernel. Remove the mand
[   64.828138][ T5823]          option from the mount to silence this warning.
[   64.828138][ T5823] =======================================================
[pid  5823] 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  5823] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3
[pid  5823] chdir("./file1")            = 0
[pid  5823] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5823] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5822] <... futex resumed>)        = 0
[pid  5823] <... futex resumed>)        = 1
[pid  5822] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5823] unlink(NULL <unfinished ...>
[pid  5822] <... futex resumed>)        = 0
[pid  5823] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5822] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5823] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5822] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5823] <... futex resumed>)        = 0
[pid  5822] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5823] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5822] <... futex resumed>)        = 0
[   64.878169][ T5823] JBD2: Ignoring recovery information on journal
[   64.905318][ T5823] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
[pid  5822] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5823] <... mkdirat resumed>)      = 0
[pid  5823] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5822] <... futex resumed>)        = 0
[pid  5823] <... futex resumed>)        = 1
[pid  5822] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5823] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5822] <... futex resumed>)        = 0
[pid  5823] <... mkdirat resumed>)      = 0
[pid  5822] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5823] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5822] <... futex resumed>)        = 0
[pid  5823] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5822] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5823] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5822] <... futex resumed>)        = 0
[pid  5823] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5822] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5823] <... mkdirat resumed>)      = 0
[pid  5823] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5822] <... futex resumed>)        = 0
[pid  5823] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5822] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5823] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5822] <... futex resumed>)        = 0
[pid  5823] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5822] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out)
[pid  5822] futex(0x7fcc24d175fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[   65.000134][ T5823] overlayfs: upper fs does not support tmpfile.
[   65.009581][ T5823] overlayfs: upper fs does not support RENAME_WHITEOUT.
[   65.017011][ T5823] 
[   65.019344][ T5823] ======================================================
[   65.026351][ T5823] WARNING: possible circular locking dependency detected
[   65.033388][ T5823] 6.13.0-syzkaller-02526-gc4b9570cfb63 #0 Not tainted
[   65.040135][ T5823] ------------------------------------------------------
[pid  5822] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c02000
[pid  5822] mprotect(0x7fcc24c03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5822] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5822] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c22990, parent_tid=0x7fcc24c22990, exit_signal=0, stack=0x7fcc24c02000, stack_size=0x20300, tls=0x7fcc24c226c0}./strace-static-x86_64: Process 5826 attached
 <unfinished ...>
[pid  5826] rseq(0x7fcc24c22fe0, 0x20, 0, 0x53053053 <unfinished ...>
[pid  5822] <... clone3 resumed> => {parent_tid=[5826]}, 88) = 5826
[pid  5826] <... rseq resumed>)         = 0
[pid  5826] set_robust_list(0x7fcc24c229a0, 24 <unfinished ...>
[pid  5822] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5826] <... set_robust_list resumed>) = 0
[pid  5826] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5822] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5826] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5826] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5822] futex(0x7fcc24d175f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5826] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5822] <... futex resumed>)        = 0
[pid  5826] futex(0x7fcc24d175fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5822] futex(0x7fcc24d175fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5826] <... futex resumed>)        = 0
[pid  5822] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[   65.047138][ T5823] syz-executor303/5823 is trying to acquire lock:
[   65.053531][ T5823] ffff888077ce42c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x132/0x2840
[   65.067035][ T5823] 
[   65.067035][ T5823] but task is already holding lock:
[   65.074405][ T5823] ffff888077c59538 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x633/0x1930
[   65.083873][ T5823] 
[   65.083873][ T5823] which lock already depends on the new lock.
[   65.083873][ T5823] 
[   65.094283][ T5823] 
[pid  5826] futex(0x7fcc24d175f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5822] futex(0x7fcc24d175f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5826] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5826] chown(NULL, 0, 0 <unfinished ...>
[pid  5822] <... futex resumed>)        = 0
[pid  5822] futex(0x7fcc24d175fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5826] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5826] futex(0x7fcc24d175fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5822] <... futex resumed>)        = 0
[   65.094283][ T5823] the existing dependency chain (in reverse order) is:
[   65.103307][ T5823] 
[   65.103307][ T5823] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}:
[   65.111114][ T5823]        lock_acquire+0x1ed/0x550
[   65.116148][ T5823]        down_write+0x99/0x220
[   65.120907][ T5823]        ocfs2_xattr_set_handle+0x539/0xa10
[   65.126783][ T5823]        ocfs2_init_security_set+0xbd/0xd0
[   65.132576][ T5823]        ocfs2_mknod+0x1ccf/0x2b30
[   65.137675][ T5823]        ocfs2_mkdir+0x1ab/0x470
[   65.142614][ T5823]        vfs_mkdir+0x2f9/0x4f0
[   65.147369][ T5823]        do_mkdirat+0x264/0x3a0
[   65.152205][ T5823]        __x64_sys_mkdirat+0x87/0xa0
[   65.157475][ T5823]        do_syscall_64+0xf3/0x230
[   65.162486][ T5823]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   65.168893][ T5823] 
[   65.168893][ T5823] -> #3 (jbd2_handle){.+.+}-{0:0}:
[   65.176171][ T5823]        lock_acquire+0x1ed/0x550
[   65.181186][ T5823]        start_this_handle+0x1eb4/0x2110
[   65.186890][ T5823]        jbd2__journal_start+0x2da/0x5d0
[   65.192507][ T5823]        jbd2_journal_start+0x29/0x40
[   65.197860][ T5823]        ocfs2_start_trans+0x3c9/0x700
[   65.203303][ T5823]        ocfs2_reserve_suballoc_bits+0x9f6/0x4e70
[   65.209704][ T5823]        ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0
[   65.216540][ T5823]        ocfs2_mknod+0x143a/0x2b30
[   65.221636][ T5823]        ocfs2_mkdir+0x1ab/0x470
[   65.226559][ T5823]        vfs_mkdir+0x2f9/0x4f0
[   65.231306][ T5823]        do_mkdirat+0x264/0x3a0
[   65.236138][ T5823]        __x64_sys_mkdirat+0x87/0xa0
[   65.241490][ T5823]        do_syscall_64+0xf3/0x230
[   65.246526][ T5823]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   65.252934][ T5823] 
[   65.252934][ T5823] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
[   65.261444][ T5823]        lock_acquire+0x1ed/0x550
[   65.266452][ T5823]        down_read+0xb1/0xa40
[   65.271113][ T5823]        ocfs2_start_trans+0x3be/0x700
[   65.276554][ T5823]        ocfs2_reserve_suballoc_bits+0x9f6/0x4e70
[   65.282950][ T5823]        ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0
[   65.289804][ T5823]        ocfs2_mknod+0x143a/0x2b30
[   65.294898][ T5823]        ocfs2_mkdir+0x1ab/0x470
[   65.299820][ T5823]        vfs_mkdir+0x2f9/0x4f0
[   65.304567][ T5823]        do_mkdirat+0x264/0x3a0
[   65.309404][ T5823]        __x64_sys_mkdirat+0x87/0xa0
[   65.314672][ T5823]        do_syscall_64+0xf3/0x230
[   65.319680][ T5823]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   65.326078][ T5823] 
[   65.326078][ T5823] -> #1 (sb_internal#2){.+.+}-{0:0}:
[   65.333532][ T5823]        lock_acquire+0x1ed/0x550
[   65.338541][ T5823]        ocfs2_start_trans+0x2b9/0x700
[   65.343983][ T5823]        ocfs2_mknod+0x150c/0x2b30
[   65.349081][ T5823]        ocfs2_mkdir+0x1ab/0x470
[   65.354001][ T5823]        vfs_mkdir+0x2f9/0x4f0
[   65.358753][ T5823]        do_mkdirat+0x264/0x3a0
[   65.363605][ T5823]        __x64_sys_mkdirat+0x87/0xa0
[   65.368874][ T5823]        do_syscall_64+0xf3/0x230
[   65.373884][ T5823]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   65.380283][ T5823] 
[   65.380283][ T5823] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}:
[   65.390794][ T5823]        validate_chain+0x18ef/0x5920
[   65.396184][ T5823]        __lock_acquire+0x1397/0x2100
[   65.401550][ T5823]        lock_acquire+0x1ed/0x550
[   65.406565][ T5823]        down_write+0x99/0x220
[   65.411320][ T5823]        ocfs2_reserve_local_alloc_bits+0x132/0x2840
[   65.418003][ T5823]        ocfs2_reserve_clusters_with_limit+0x1b8/0xb60
[   65.424870][ T5823]        ocfs2_init_xattr_set_ctxt+0x420/0x8e0
[   65.431009][ T5823]        ocfs2_xattr_set+0xf4e/0x1930
[   65.436400][ T5823]        __vfs_setxattr+0x468/0x4a0
[   65.441587][ T5823]        __vfs_setxattr_noperm+0x12e/0x660
[   65.447379][ T5823]        vfs_setxattr+0x221/0x430
[   65.452427][ T5823]        ovl_get_workdir+0xda0/0x1930
[   65.457789][ T5823]        ovl_fill_super+0x12a8/0x3560
[   65.463151][ T5823]        get_tree_nodev+0xb7/0x140
[   65.468250][ T5823]        vfs_get_tree+0x90/0x2b0
[   65.473170][ T5823]        do_new_mount+0x2be/0xb40
[   65.478186][ T5823]        __se_sys_mount+0x2d6/0x3c0
[   65.483392][ T5823]        do_syscall_64+0xf3/0x230
[   65.488421][ T5823]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   65.494826][ T5823] 
[   65.494826][ T5823] other info that might help us debug this:
[   65.494826][ T5823] 
[   65.505038][ T5823] Chain exists of:
[   65.505038][ T5823]   &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> jbd2_handle --> &oi->ip_xattr_sem
[   65.505038][ T5823] 
[   65.520775][ T5823]  Possible unsafe locking scenario:
[   65.520775][ T5823] 
[   65.528205][ T5823]        CPU0                    CPU1
[   65.533554][ T5823]        ----                    ----
[   65.538896][ T5823]   lock(&oi->ip_xattr_sem);
[   65.543491][ T5823]                                lock(jbd2_handle);
[   65.550063][ T5823]                                lock(&oi->ip_xattr_sem);
[   65.557162][ T5823]   lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5);
[   65.564436][ T5823] 
[   65.564436][ T5823]  *** DEADLOCK ***
[   65.564436][ T5823] 
[   65.572580][ T5823] 4 locks held by syz-executor303/5823:
[   65.578116][ T5823]  #0: ffff8880359320e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0
[   65.588200][ T5823]  #1: ffff888023c54420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90
[   65.597324][ T5823]  #2: ffff888077c59800 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x1e1/0x430
[   65.607753][ T5823]  #3: ffff888077c59538 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x633/0x1930
[   65.617661][ T5823] 
[   65.617661][ T5823] stack backtrace:
[   65.623556][ T5823] CPU: 1 UID: 0 PID: 5823 Comm: syz-executor303 Not tainted 6.13.0-syzkaller-02526-gc4b9570cfb63 #0
[   65.623574][ T5823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[   65.623588][ T5823] Call Trace:
[   65.623596][ T5823]  <TASK>
[   65.623603][ T5823]  dump_stack_lvl+0x241/0x360
[   65.623633][ T5823]  ? __pfx_dump_stack_lvl+0x10/0x10
[   65.623653][ T5823]  ? __pfx__printk+0x10/0x10
[   65.623675][ T5823]  print_circular_bug+0x13a/0x1b0
[   65.623697][ T5823]  check_noncircular+0x36a/0x4a0
[   65.623718][ T5823]  ? __pfx_check_noncircular+0x10/0x10
[   65.623730][ T5823]  ? lockdep_lock+0x123/0x2b0
[   65.623742][ T5823]  validate_chain+0x18ef/0x5920
[   65.623754][ T5823]  ? __pfx_validate_chain+0x10/0x10
[   65.623769][ T5823]  ? __pfx_validate_chain+0x10/0x10
[   65.623783][ T5823]  ? mark_lock+0x9a/0x360
[   65.623795][ T5823]  ? ocfs2_get_system_file_inode+0x1d4/0x7b0
[   65.623809][ T5823]  ? __pfx_lock_release+0x10/0x10
[   65.623820][ T5823]  ? mark_lock+0x9a/0x360
[   65.623831][ T5823]  __lock_acquire+0x1397/0x2100
[   65.623844][ T5823]  lock_acquire+0x1ed/0x550
[   65.623854][ T5823]  ? ocfs2_reserve_local_alloc_bits+0x132/0x2840
[   65.623868][ T5823]  ? __pfx_lock_acquire+0x10/0x10
[   65.623879][ T5823]  ? __pfx___might_resched+0x10/0x10
[   65.623888][ T5823]  ? __pfx_ocfs2_get_system_file_inode+0x10/0x10
[   65.623901][ T5823]  ? __pfx_validate_chain+0x10/0x10
[   65.623912][ T5823]  ? lockdep_hardirqs_on_prepare+0x43d/0x780
[   65.623923][ T5823]  down_write+0x99/0x220
[   65.623935][ T5823]  ? ocfs2_reserve_local_alloc_bits+0x132/0x2840
[   65.623947][ T5823]  ? __pfx_down_write+0x10/0x10
[   65.623961][ T5823]  ocfs2_reserve_local_alloc_bits+0x132/0x2840
[   65.623976][ T5823]  ? mark_lock+0x9a/0x360
[   65.623987][ T5823]  ? __lock_acquire+0x1397/0x2100
[   65.623997][ T5823]  ? __pfx_ocfs2_reserve_local_alloc_bits+0x10/0x10
[   65.624013][ T5823]  ? __pfx_lock_acquire+0x10/0x10
[   65.624023][ T5823]  ? ocfs2_alloc_should_use_local+0x155/0x320
[   65.624035][ T5823]  ? __pfx_lock_release+0x10/0x10
[   65.624044][ T5823]  ? do_raw_spin_lock+0x14f/0x370
[   65.624054][ T5823]  ? do_raw_spin_unlock+0x13c/0x8b0
[   65.624063][ T5823]  ? _raw_spin_unlock+0x28/0x50
[   65.624072][ T5823]  ? ocfs2_alloc_should_use_local+0x155/0x320
[   65.624084][ T5823]  ocfs2_reserve_clusters_with_limit+0x1b8/0xb60
[   65.624095][ T5823]  ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10
[   65.624106][ T5823]  ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10
[   65.624119][ T5823]  ? ocfs2_xattr_set+0xf00/0x1930
[   65.624130][ T5823]  ocfs2_init_xattr_set_ctxt+0x420/0x8e0
[   65.624141][ T5823]  ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10
[   65.624151][ T5823]  ? up_write+0x1a9/0x590
[   65.624164][ T5823]  ? __pfx_ocfs2_truncate_log_needs_flush+0x10/0x10
[   65.624175][ T5823]  ? __pfx_up_write+0x10/0x10
[   65.624187][ T5823]  ? __kmalloc_cache_noprof+0x243/0x390
[   65.624197][ T5823]  ? ocfs2_xattr_set+0x4d5/0x1930
[   65.624207][ T5823]  ocfs2_xattr_set+0xf4e/0x1930
[   65.624220][ T5823]  ? __pfx_ocfs2_xattr_set+0x10/0x10
[   65.624230][ T5823]  ? _prb_read_valid+0xa39/0xac0
[   65.624247][ T5823]  ? mark_lock+0x9a/0x360
[   65.624261][ T5823]  ? smk_tskacc+0x300/0x370
[   65.624276][ T5823]  ? posix_xattr_acl+0xa9/0xd0
[   65.624287][ T5823]  ? evm_protect_xattr+0x4be/0xb30
[   65.624298][ T5823]  ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10
[   65.624309][ T5823]  __vfs_setxattr+0x468/0x4a0
[   65.624325][ T5823]  __vfs_setxattr_noperm+0x12e/0x660
[   65.624335][ T5823]  vfs_setxattr+0x221/0x430
[   65.624345][ T5823]  ? __pfx_vfs_setxattr+0x10/0x10
[   65.624361][ T5823]  ? _raw_spin_unlock+0x28/0x50
[   65.624370][ T5823]  ? dput+0x37/0x2b0
[   65.624380][ T5823]  ovl_get_workdir+0xda0/0x1930
[   65.624395][ T5823]  ? __pfx_ovl_get_workdir+0x10/0x10
[   65.624409][ T5823]  ? ovl_inuse_trylock+0xab/0xf0
[   65.624420][ T5823]  ? do_raw_spin_lock+0x14f/0x370
[   65.624432][ T5823]  ? _raw_spin_unlock+0x28/0x50
[   65.624441][ T5823]  ? ovl_inuse_trylock+0xab/0xf0
[   65.624453][ T5823]  ovl_fill_super+0x12a8/0x3560
[   65.624466][ T5823]  ? shrinker_register+0x118/0x230
[   65.624478][ T5823]  ? __pfx_lock_release+0x10/0x10
[   65.624491][ T5823]  ? __pfx_ovl_fill_super+0x10/0x10
[   65.624502][ T5823]  ? __pfx_lockdep_init_map_type+0x10/0x10
[   65.624513][ T5823]  ? __pfx___mutex_unlock_slowpath+0x10/0x10
[   65.624528][ T5823]  ? sget_fc+0x909/0x9c0
[   65.624540][ T5823]  ? __pfx_set_anon_super_fc+0x10/0x10
[   65.624551][ T5823]  ? __pfx_ovl_fill_super+0x10/0x10
[   65.624563][ T5823]  get_tree_nodev+0xb7/0x140
[   65.624575][ T5823]  vfs_get_tree+0x90/0x2b0
[   65.624587][ T5823]  do_new_mount+0x2be/0xb40
[   65.624597][ T5823]  ? __pfx_do_new_mount+0x10/0x10
[   65.624610][ T5823]  __se_sys_mount+0x2d6/0x3c0
[   65.624620][ T5823]  ? __pfx___se_sys_mount+0x10/0x10
[   65.624630][ T5823]  ? do_syscall_64+0x100/0x230
[   65.624642][ T5823]  ? __x64_sys_mount+0x20/0xc0
[   65.624651][ T5823]  do_syscall_64+0xf3/0x230
[   65.624663][ T5823]  ? clear_bhb_loop+0x35/0x90
[   65.624677][ T5823]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   65.624692][ T5823] RIP: 0033:0x7fcc24c8c589
[   65.624704][ T5823] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 18 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 b0 ff ff ff f7 d8 64 89 01 48
[   65.624711][ T5823] RSP: 002b:00007fcc24c43218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   65.624722][ T5823] RAX: ffffffffffffffda RBX: 00007fcc24d175e8 RCX: 00007fcc24c8c589
[   65.624728][ T5823] RDX: 0000000020000340 RSI: 00000000200000c0 RDI: 0000000000000000
[   65.624737][ T5823] RBP: 00007fcc24d175e0 R08: 0000000020000140 R09: 0000000000000000
[pid  5826] futex(0x7fcc24d175f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5823] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5823] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5822] exit_group(0 <unfinished ...>
[pid  5826] <... futex resumed>)        = ?
[pid  5822] <... exit_group resumed>)   = ?
[pid  5826] +++ exited with 0 +++
[pid  5823] <... futex resumed>)        = ?
[pid  5823] +++ exited with 0 +++
[pid  5822] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5822, si_uid=0, si_status=0, si_utime=0, si_stime=21 /* 0.21 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=0x555592081690) = 5827
[pid  5827] set_robust_list(0x5555920816a0, 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] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5827] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5827] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5827] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5827] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5827] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5827] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5828 attached
 <unfinished ...>
[pid  5828] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5828] set_robust_list(0x7fcc24c439a0, 24) = 0
[pid  5828] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5827] <... clone3 resumed> => {parent_tid=[5828]}, 88) = 5828
[pid  5828] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5827] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5828] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5827] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5828] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5827] <... futex resumed>)        = 0
[pid  5828] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5827] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5828] <... memfd_create resumed>) = 3
[pid  5828] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[   65.624747][ T5823] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc24ce4648
[   65.624756][ T5823] R13: 7269647265707075 R14: 7269647265776f6c R15: 0079616c7265766f
[   65.624772][ T5823]  </TASK>
[   66.173909][ T5823] overlayfs: upper fs missing required features.
[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(0x7fcc1c800000, 138412032) = 0
[pid  5828] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5828] close(3)                    = 0
[pid  5828] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5827] <... futex resumed>)        = 0
[pid  5828] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5827] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5828] <... futex resumed>)        = 0
[pid  5827] <... futex resumed>)        = 1
[pid  5828] unlink(NULL)                = -1 EFAULT (Bad address)
[pid  5827] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5828] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5827] <... futex resumed>)        = 0
[pid  5828] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5827] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5828] <... futex resumed>)        = 0
[pid  5828] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5827] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5828] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5828] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5827] <... futex resumed>)        = 0
[pid  5828] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5827] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5828] <... futex resumed>)        = 0
[pid  5827] <... futex resumed>)        = 1
[pid  5828] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5827] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5828] <... mkdirat resumed>)      = 0
[pid  5828] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5827] <... futex resumed>)        = 0
[pid  5828] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5827] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5828] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5827] <... futex resumed>)        = 0
[pid  5828] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5827] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5828] <... mkdirat resumed>)      = 0
[pid  5828] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5827] <... futex resumed>)        = 0
[pid  5827] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5828] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5827] <... futex resumed>)        = 0
[pid  5827] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5828] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5828] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5827] <... futex resumed>)        = 0
[pid  5828] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5827] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5828] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5827] <... futex resumed>)        = 0
[pid  5828] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5827] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5828] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5828] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5828] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5827] <... futex resumed>)        = 0
[pid  5827] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5828] <... futex resumed>)        = 0
[pid  5827] <... futex resumed>)        = 1
[pid  5828] chown(NULL, 0, 0 <unfinished ...>
[pid  5827] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5828] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5828] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5827] <... futex resumed>)        = 0
[pid  5828] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5827] exit_group(0 <unfinished ...>
[pid  5828] <... futex resumed>)        = ?
[pid  5827] <... exit_group resumed>)   = ?
[pid  5828] +++ exited with 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=9 /* 0.09 s */} ---
[   66.331870][ T5828] overlayfs: workdir and upperdir must reside under the same mount
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5829 attached
, child_tidptr=0x555592081690) = 5829
[pid  5829] set_robust_list(0x5555920816a0, 24) = 0
[pid  5829] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5829] setpgid(0, 0)               = 0
[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
[pid  5829] write(1, "executing program\n", 18executing program
) = 18
[pid  5829] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5829] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5829] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5829] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5829] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5829] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5829] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5830 attached
 <unfinished ...>
[pid  5830] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5829] <... clone3 resumed> => {parent_tid=[5830]}, 88) = 5830
[pid  5830] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5829] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5830] <... set_robust_list resumed>) = 0
[pid  5829] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5830] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5829] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5830] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5829] <... futex resumed>)        = 0
[pid  5829] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5830] <... memfd_create resumed>) = 3
[pid  5830] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5830] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5830] close(3)                    = 0
[pid  5830] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5829] <... futex resumed>)        = 0
[pid  5830] <... futex resumed>)        = 1
[pid  5829] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5830] unlink(NULL <unfinished ...>
[pid  5829] <... futex resumed>)        = 0
[pid  5830] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5829] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5830] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5829] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5830] <... futex resumed>)        = 0
[pid  5829] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5830] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5829] <... futex resumed>)        = 0
[pid  5830] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5829] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5830] <... futex resumed>)        = 0
[pid  5829] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5830] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5829] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5830] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5829] <... futex resumed>)        = 0
[pid  5830] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5829] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5830] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5830] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5829] <... futex resumed>)        = 0
[pid  5830] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5829] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5830] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5829] <... futex resumed>)        = 0
[pid  5830] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5829] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5830] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5830] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5829] <... futex resumed>)        = 0
[pid  5830] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5829] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5830] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5829] <... futex resumed>)        = 0
[pid  5830] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5829] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5830] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5830] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5829] <... futex resumed>)        = 0
[pid  5830] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5829] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5830] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5829] <... futex resumed>)        = 0
[pid  5830] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5829] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5830] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5830] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5829] <... futex resumed>)        = 0
[pid  5830] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5829] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5830] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5829] <... futex resumed>)        = 0
[pid  5830] chown(NULL, 0, 0 <unfinished ...>
[pid  5829] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5830] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5830] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5829] <... futex resumed>)        = 0
[pid  5829] exit_group(0)               = ?
[pid  5830] +++ exited with 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=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 5831 attached
 <unfinished ...>
[pid  5831] set_robust_list(0x5555920816a0, 24) = 0
[pid  5820] <... clone resumed>, child_tidptr=0x555592081690) = 5831
[pid  5831] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[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
[pid  5831] write(1, "executing program\n", 18executing program
) = 18
[pid  5831] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[   66.694732][ T5830] overlayfs: workdir and upperdir must reside under the same mount
[pid  5831] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5831] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5831] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5831] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5831] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5831] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5832 attached
 <unfinished ...>
[pid  5832] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5831] <... clone3 resumed> => {parent_tid=[5832]}, 88) = 5832
[pid  5832] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5831] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5832] <... set_robust_list resumed>) = 0
[pid  5832] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5831] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5832] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5831] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5831] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5832] memfd_create("syzkaller", 0) = 3
[pid  5832] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5832] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5832] close(3)                    = 0
[pid  5832] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5831] <... futex resumed>)        = 0
[pid  5832] unlink(NULL <unfinished ...>
[pid  5831] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5832] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5831] <... futex resumed>)        = 0
[pid  5832] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5832] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5831] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5831] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5832] <... futex resumed>)        = 0
[pid  5831] <... futex resumed>)        = 1
[pid  5832] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5831] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5832] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5832] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5831] <... futex resumed>)        = 0
[pid  5832] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5831] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5832] <... futex resumed>)        = 0
[pid  5831] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5832] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5832] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5831] <... futex resumed>)        = 0
[pid  5831] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5832] mkdirat(AT_FDCWD, "./bus", 000) = -1 EEXIST (File exists)
[pid  5832] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5831] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5831] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5832] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5831] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5832] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5832] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5831] <... futex resumed>)        = 0
[pid  5832] <... futex resumed>)        = 1
[pid  5831] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5832] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5831] <... futex resumed>)        = 0
[pid  5832] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5831] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5832] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5831] <... futex resumed>)        = 0
[pid  5832] chown(NULL, 0, 0 <unfinished ...>
[pid  5831] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5832] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5831] <... futex resumed>)        = 0
[pid  5831] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5832] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5831] <... futex resumed>)        = 0
[pid  5832] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5831] exit_group(0 <unfinished ...>
[pid  5832] <... futex resumed>)        = ?
[pid  5831] <... exit_group resumed>)   = ?
[pid  5832] +++ exited with 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=2 /* 0.02 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 5833 attached
, child_tidptr=0x555592081690) = 5833
[   66.924799][ T5832] overlayfs: workdir and upperdir must reside under the same mount
[pid  5833] set_robust_list(0x5555920816a0, 24) = 0
[pid  5833] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5833] setpgid(0, 0)               = 0
[pid  5833] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5833] write(3, "1000", 4)         = 4
[pid  5833] close(3)                    = 0
[pid  5833] write(1, "executing program\n", 18executing program
) = 18
[pid  5833] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5833] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5833] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5833] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5833] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5833] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5833] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5834 attached
 => {parent_tid=[5834]}, 88) = 5834
[pid  5834] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5834] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5833] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5834] <... set_robust_list resumed>) = 0
[pid  5833] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5834] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5833] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5834] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5833] <... futex resumed>)        = 0
[pid  5833] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5834] memfd_create("syzkaller", 0) = 3
[pid  5834] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5834] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5834] close(3)                    = 0
[pid  5834] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5833] <... futex resumed>)        = 0
[pid  5833] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5834] unlink(NULL <unfinished ...>
[pid  5833] <... futex resumed>)        = 0
[pid  5834] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5834] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5833] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5834] <... futex resumed>)        = 0
[pid  5833] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5834] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5833] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5834] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5833] <... futex resumed>)        = 0
[pid  5834] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5833] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5834] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5833] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5834] <... futex resumed>)        = 0
[pid  5833] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5834] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5833] <... futex resumed>)        = 0
[pid  5833] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5834] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5834] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5833] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5833] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5834] <... futex resumed>)        = 0
[pid  5833] <... futex resumed>)        = 1
[pid  5834] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5833] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5834] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5834] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5834] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5833] <... futex resumed>)        = 0
[pid  5834] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5833] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5834] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5833] <... futex resumed>)        = 0
[pid  5833] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5834] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5834] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5833] <... futex resumed>)        = 0
[pid  5834] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5833] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5834] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5833] <... futex resumed>)        = 0
[pid  5834] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5833] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5834] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5834] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5833] <... futex resumed>)        = 0
[pid  5834] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5833] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5834] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5833] <... futex resumed>)        = 0
[pid  5834] chown(NULL, 0, 0 <unfinished ...>
[pid  5833] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5834] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5834] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5833] <... futex resumed>)        = 0
[pid  5834] <... futex resumed>)        = 1
[pid  5833] exit_group(0 <unfinished ...>
[pid  5834] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid  5833] <... exit_group resumed>)   = ?
[pid  5834] +++ exited with 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=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} ---
[   67.265455][ T5834] overlayfs: workdir and upperdir must reside under the same mount
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5835 attached
, child_tidptr=0x555592081690) = 5835
[pid  5835] set_robust_list(0x5555920816a0, 24) = 0
[pid  5835] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5835] setpgid(0, 0)               = 0
[pid  5835] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5835] write(3, "1000", 4)         = 4
[pid  5835] close(3)                    = 0
[pid  5835] write(1, "executing program\n", 18executing program
) = 18
[pid  5835] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5835] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5835] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5835] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5835] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5835] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5835] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5836 attached
 <unfinished ...>
[pid  5836] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053 <unfinished ...>
[pid  5835] <... clone3 resumed> => {parent_tid=[5836]}, 88) = 5836
[pid  5836] <... rseq resumed>)         = 0
[pid  5836] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5835] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5836] <... set_robust_list resumed>) = 0
[pid  5835] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5836] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5835] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5836] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5835] <... futex resumed>)        = 0
[pid  5835] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5836] <... memfd_create resumed>) = 3
[pid  5836] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5836] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5836] close(3)                    = 0
[pid  5836] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5835] <... futex resumed>)        = 0
[pid  5836] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5835] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5836] <... futex resumed>)        = 0
[pid  5835] <... futex resumed>)        = 1
[pid  5836] unlink(NULL <unfinished ...>
[pid  5835] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5836] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5836] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5835] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5836] <... futex resumed>)        = 0
[pid  5835] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5836] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5835] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5836] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5836] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5835] <... futex resumed>)        = 0
[pid  5836] <... futex resumed>)        = 1
[pid  5836] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5835] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5836] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5836] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5835] <... futex resumed>)        = 0
[pid  5836] <... futex resumed>)        = 0
[pid  5835] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5836] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5835] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5835] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5836] <... futex resumed>)        = 0
[pid  5836] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5835] <... futex resumed>)        = 1
[pid  5836] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5835] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5836] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5835] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5836] <... futex resumed>)        = 0
[pid  5835] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5836] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5835] <... futex resumed>)        = 0
[pid  5835] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5836] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5836] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5835] <... futex resumed>)        = 0
[pid  5836] <... futex resumed>)        = 1
[pid  5835] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5836] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5835] <... futex resumed>)        = 0
[pid  5835] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5836] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5836] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5836] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5835] <... futex resumed>)        = 0
[pid  5835] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5836] <... futex resumed>)        = 0
[pid  5835] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5836] chown(NULL, 0, 0)           = -1 EFAULT (Bad address)
[pid  5836] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5835] <... futex resumed>)        = 0
[pid  5836] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5835] exit_group(0 <unfinished ...>
[pid  5836] <... futex resumed>)        = ?
[pid  5835] <... exit_group resumed>)   = ?
[pid  5836] +++ exited with 0 +++
[pid  5835] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5835, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} ---
[   67.645189][ T5836] overlayfs: workdir and upperdir must reside under the same mount
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5837 attached
, child_tidptr=0x555592081690) = 5837
[pid  5837] set_robust_list(0x5555920816a0, 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] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5837] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5837] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5837] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5837] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5837] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5837] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5838 attached
 <unfinished ...>
[pid  5838] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5837] <... clone3 resumed> => {parent_tid=[5838]}, 88) = 5838
[pid  5838] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5837] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5838] <... set_robust_list resumed>) = 0
[pid  5838] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5837] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5838] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5837] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5838] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5837] <... futex resumed>)        = 0
[pid  5837] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5838] <... memfd_create resumed>) = 3
[pid  5838] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5838] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5838] close(3)                    = 0
[pid  5838] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5837] <... futex resumed>)        = 0
[pid  5838] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5837] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5838] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5837] <... futex resumed>)        = 0
[pid  5838] unlink(NULL)                = -1 EFAULT (Bad address)
[pid  5837] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5838] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5837] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5838] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5837] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5838] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5837] <... futex resumed>)        = 0
[pid  5838] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5837] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5838] <... futex resumed>)        = 0
[pid  5837] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5838] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5837] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5838] <... futex resumed>)        = 0
[pid  5837] <... futex resumed>)        = 1
[pid  5838] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5837] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5838] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5838] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5837] <... futex resumed>)        = 0
[pid  5838] <... futex resumed>)        = 1
[pid  5837] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5838] mkdirat(AT_FDCWD, "./bus", 000) = -1 EEXIST (File exists)
[pid  5837] <... futex resumed>)        = 0
[pid  5837] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5838] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5837] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5838] <... futex resumed>)        = 0
[pid  5837] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5838] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5837] <... futex resumed>)        = 0
[pid  5837] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5838] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5838] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5837] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5838] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5837] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5838] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5838] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5837] <... futex resumed>)        = 0
[pid  5838] <... futex resumed>)        = 0
[pid  5837] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5838] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5837] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5837] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5838] <... futex resumed>)        = 0
[pid  5838] chown(NULL, 0, 0 <unfinished ...>
[pid  5837] <... futex resumed>)        = 1
[pid  5838] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5837] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5838] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5837] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5838] <... futex resumed>)        = 0
[pid  5837] exit_group(0 <unfinished ...>
[pid  5838] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid  5837] <... exit_group resumed>)   = ?
[pid  5838] +++ exited with 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=2 /* 0.02 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, child_tidptr=0x555592081690) = 5839
./strace-static-x86_64: Process 5839 attached
[   67.885614][ T5838] overlayfs: workdir and upperdir must reside under the same mount
[pid  5839] set_robust_list(0x5555920816a0, 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
[pid  5839] write(1, "executing program\n", 18executing program
) = 18
[pid  5839] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5839] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5839] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5839] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5839] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5839] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5839] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5840 attached
 <unfinished ...>
[pid  5840] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053 <unfinished ...>
[pid  5839] <... clone3 resumed> => {parent_tid=[5840]}, 88) = 5840
[pid  5840] <... rseq resumed>)         = 0
[pid  5839] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5840] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5839] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5840] <... set_robust_list resumed>) = 0
[pid  5839] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5840] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5839] <... futex resumed>)        = 0
[pid  5840] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5839] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5840] memfd_create("syzkaller", 0) = 3
[pid  5840] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[pid  5840] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5840] munmap(0x7fcc1c800000, 138412032) = 0
[pid  5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5840] close(3)                    = 0
[pid  5840] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5839] <... futex resumed>)        = 0
[pid  5840] <... futex resumed>)        = 1
[pid  5839] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5840] unlink(NULL <unfinished ...>
[pid  5839] <... futex resumed>)        = 0
[pid  5840] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5839] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5840] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5839] <... futex resumed>)        = 0
[pid  5840] <... futex resumed>)        = 1
[pid  5839] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5840] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5839] <... futex resumed>)        = 0
[pid  5840] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5839] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5840] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5839] <... futex resumed>)        = 0
[pid  5840] <... futex resumed>)        = 1
[pid  5839] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5840] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5839] <... futex resumed>)        = 0
[pid  5840] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5839] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5840] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5839] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5840] <... futex resumed>)        = 0
[pid  5840] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5839] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5840] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5839] <... futex resumed>)        = 0
[pid  5839] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5840] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5839] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5840] <... futex resumed>)        = 0
[pid  5840] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5839] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5839] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5840] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5840] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5839] <... futex resumed>)        = 0
[pid  5840] <... futex resumed>)        = 1
[pid  5839] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5840] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5839] <... futex resumed>)        = 0
[pid  5840] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5839] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5840] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5839] <... futex resumed>)        = 0
[pid  5840] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5839] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5840] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5839] <... futex resumed>)        = 0
[pid  5840] chown(NULL, 0, 0 <unfinished ...>
[pid  5839] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5840] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5840] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5839] <... futex resumed>)        = 0
[pid  5839] exit_group(0 <unfinished ...>
[pid  5840] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid  5840] +++ exited with 0 +++
[pid  5839] <... exit_group resumed>)   = ?
[pid  5839] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5839, si_uid=0, si_status=0, si_utime=1 /* 0.01 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 5841 attached
, child_tidptr=0x555592081690) = 5841
[pid  5841] set_robust_list(0x5555920816a0, 24) = 0
[pid  5841] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[   68.205389][ T5840] overlayfs: workdir and upperdir must reside under the same mount
[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] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5841] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5841] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5841] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5841] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5841] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5841] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5842 attached
 <unfinished ...>
[pid  5842] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5842] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5841] <... clone3 resumed> => {parent_tid=[5842]}, 88) = 5842
[pid  5842] <... set_robust_list resumed>) = 0
[pid  5842] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5841] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5842] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5842] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5841] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5841] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5842] <... futex resumed>)        = 0
[pid  5841] <... futex resumed>)        = 1
[pid  5842] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5841] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5842] <... memfd_create resumed>) = 3
[pid  5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5842] close(3)                    = 0
[pid  5842] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5841] <... futex resumed>)        = 0
[pid  5842] <... futex resumed>)        = 1
[pid  5841] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5842] unlink(NULL <unfinished ...>
[pid  5841] <... futex resumed>)        = 0
[pid  5842] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5841] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5842] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5841] <... futex resumed>)        = 0
[pid  5842] <... futex resumed>)        = 1
[pid  5841] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5842] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5841] <... futex resumed>)        = 0
[pid  5842] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5841] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5842] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5841] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5842] <... futex resumed>)        = 0
[pid  5841] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5842] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5841] <... futex resumed>)        = 0
[pid  5842] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5841] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5842] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5841] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5842] <... futex resumed>)        = 0
[pid  5841] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5842] mkdirat(AT_FDCWD, "./bus", 000) = -1 EEXIST (File exists)
[pid  5841] <... futex resumed>)        = 0
[pid  5842] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5841] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5842] <... futex resumed>)        = 0
[pid  5841] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5842] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5841] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5842] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5841] <... futex resumed>)        = 0
[pid  5842] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5841] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5842] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5842] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5841] <... futex resumed>)        = 0
[pid  5842] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5841] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5842] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5841] <... futex resumed>)        = 0
[pid  5842] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5841] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5842] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5841] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5842] <... futex resumed>)        = 0
[pid  5841] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5842] chown(NULL, 0, 0 <unfinished ...>
[pid  5841] <... futex resumed>)        = 0
[pid  5842] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5842] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5841] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5842] <... futex resumed>)        = 0
[pid  5841] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5842] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5841] exit_group(0 <unfinished ...>
[pid  5842] <... futex resumed>)        = ?
[pid  5841] <... exit_group resumed>)   = ?
[pid  5842] +++ exited with 0 +++
[pid  5841] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5841, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=7 /* 0.07 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   68.521890][ T5842] 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 5843 attached
, child_tidptr=0x555592081690) = 5843
[pid  5843] set_robust_list(0x5555920816a0, 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(3)                    = 0
[pid  5843] write(1, "executing program\n", 18executing program
) = 18
[pid  5843] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5843] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5843] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5843] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5843] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5843] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5843] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5844 attached
 <unfinished ...>
[pid  5844] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5843] <... clone3 resumed> => {parent_tid=[5844]}, 88) = 5844
[pid  5844] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5843] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5844] <... set_robust_list resumed>) = 0
[pid  5843] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5844] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5843] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5844] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5844] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5843] <... futex resumed>)        = 0
[pid  5843] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5844] <... memfd_create resumed>) = 3
[pid  5844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5844] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5844] close(3)                    = 0
[pid  5844] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5843] <... futex resumed>)        = 0
[pid  5844] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5843] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5844] <... futex resumed>)        = 0
[pid  5843] <... futex resumed>)        = 1
[pid  5844] unlink(NULL <unfinished ...>
[pid  5843] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5844] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5844] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5844] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5843] <... futex resumed>)        = 0
[pid  5843] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5844] <... futex resumed>)        = 0
[pid  5843] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5844] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5844] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5843] <... futex resumed>)        = 0
[pid  5844] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5843] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5844] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5843] <... futex resumed>)        = 0
[pid  5844] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5843] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5844] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5843] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5844] <... futex resumed>)        = 0
[pid  5843] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5844] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5843] <... futex resumed>)        = 0
[pid  5844] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5843] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5844] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5843] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5844] <... futex resumed>)        = 0
[pid  5843] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5844] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5843] <... futex resumed>)        = 0
[pid  5843] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5844] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5844] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5843] <... futex resumed>)        = 0
[pid  5844] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5843] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5844] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5843] <... futex resumed>)        = 0
[pid  5843] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5844] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW) = -1 EFAULT (Bad address)
[pid  5844] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5843] <... futex resumed>)        = 0
[pid  5844] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5843] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5844] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5844] chown(NULL, 0, 0 <unfinished ...>
[pid  5843] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5844] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5844] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5843] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5844] <... futex resumed>)        = 0
[pid  5843] exit_group(0 <unfinished ...>
[pid  5844] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid  5844] +++ exited with 0 +++
[pid  5843] <... exit_group resumed>)   = ?
[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=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   68.906449][ T5844] 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 5845 attached
, child_tidptr=0x555592081690) = 5845
[pid  5845] set_robust_list(0x5555920816a0, 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] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5845] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5845] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5845] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5845] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5845] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5845] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5846 attached
 <unfinished ...>
[pid  5846] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053 <unfinished ...>
[pid  5845] <... clone3 resumed> => {parent_tid=[5846]}, 88) = 5846
[pid  5846] <... rseq resumed>)         = 0
[pid  5845] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5846] set_robust_list(0x7fcc24c439a0, 24) = 0
[pid  5846] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5846] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5845] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5846] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5845] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5846] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5845] <... futex resumed>)        = 0
[pid  5845] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5846] <... memfd_create resumed>) = 3
[pid  5846] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5846] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5846] close(3)                    = 0
[pid  5846] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5845] <... futex resumed>)        = 0
[pid  5846] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5845] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5846] <... futex resumed>)        = 0
[pid  5845] <... futex resumed>)        = 1
[pid  5846] unlink(NULL <unfinished ...>
[pid  5845] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5846] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5846] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5845] <... futex resumed>)        = 0
[pid  5846] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5845] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5846] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5845] <... futex resumed>)        = 0
[pid  5846] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5845] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5846] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5846] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5845] <... futex resumed>)        = 0
[pid  5846] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5845] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5846] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5845] <... futex resumed>)        = 0
[pid  5846] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5845] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5846] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5846] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5846] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5845] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5845] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5846] <... futex resumed>)        = 0
[pid  5845] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5846] mkdirat(AT_FDCWD, "./bus", 000) = -1 EEXIST (File exists)
[pid  5846] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5845] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5846] <... futex resumed>)        = 0
[pid  5845] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5846] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5845] <... futex resumed>)        = 0
[pid  5845] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5846] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5846] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5845] <... futex resumed>)        = 0
[pid  5845] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5845] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5846] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW) = -1 EFAULT (Bad address)
[pid  5846] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5845] <... futex resumed>)        = 0
[pid  5846] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5845] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5846] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5845] <... futex resumed>)        = 0
[pid  5846] chown(NULL, 0, 0 <unfinished ...>
[pid  5845] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5846] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5846] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5845] <... futex resumed>)        = 0
[pid  5846] <... futex resumed>)        = 1
[pid  5845] exit_group(0 <unfinished ...>
[pid  5846] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5845] <... exit_group resumed>)   = ?
[pid  5846] <... futex resumed>)        = ?
[pid  5846] +++ exited with 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=0, 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 5847 attached
[   69.180899][ T5846] overlayfs: workdir and upperdir must reside under the same mount
, child_tidptr=0x555592081690) = 5847
[pid  5847] set_robust_list(0x5555920816a0, 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] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5847] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5847] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5847] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5847] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5847] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5847] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5848 attached
 <unfinished ...>
[pid  5848] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5848] set_robust_list(0x7fcc24c439a0, 24) = 0
[pid  5847] <... clone3 resumed> => {parent_tid=[5848]}, 88) = 5848
[pid  5848] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5847] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5848] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5847] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5848] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5847] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5848] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5847] <... futex resumed>)        = 0
[pid  5847] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5848] memfd_create("syzkaller", 0) = 3
[pid  5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5848] close(3)                    = 0
[pid  5848] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5847] <... futex resumed>)        = 0
[pid  5847] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5848] <... futex resumed>)        = 1
[pid  5847] <... futex resumed>)        = 0
[pid  5848] unlink(NULL <unfinished ...>
[pid  5847] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5848] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5848] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5847] <... futex resumed>)        = 0
[pid  5848] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5847] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5848] <... futex resumed>)        = 0
[pid  5847] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5848] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5848] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5847] <... futex resumed>)        = 0
[pid  5848] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5847] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5848] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5847] <... futex resumed>)        = 0
[pid  5848] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5847] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5848] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5848] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5847] <... futex resumed>)        = 0
[pid  5848] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5847] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5848] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5848] mkdirat(AT_FDCWD, "./bus", 000) = -1 EEXIST (File exists)
[pid  5848] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5847] <... futex resumed>)        = 0
[pid  5848] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5847] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5847] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5848] <... futex resumed>)        = 0
[pid  5847] <... futex resumed>)        = 1
[pid  5848] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5847] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5848] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5848] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5848] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5847] <... futex resumed>)        = 0
[pid  5847] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5848] <... futex resumed>)        = 0
[pid  5847] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5848] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW) = -1 EFAULT (Bad address)
[pid  5848] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5847] <... futex resumed>)        = 0
[pid  5848] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5847] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5848] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5847] <... futex resumed>)        = 0
[pid  5848] chown(NULL, 0, 0 <unfinished ...>
[pid  5847] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5848] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5848] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5847] <... futex resumed>)        = 0
[pid  5848] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[   69.563843][ T5848] overlayfs: workdir and upperdir must reside under the same mount
[pid  5847] exit_group(0 <unfinished ...>
[pid  5848] <... futex resumed>)        = ?
[pid  5847] <... exit_group resumed>)   = ?
[pid  5848] +++ exited with 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=1 /* 0.01 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 5849 attached
, child_tidptr=0x555592081690) = 5849
[pid  5849] set_robust_list(0x5555920816a0, 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] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5849] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5849] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5849] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5849] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5849] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5850 attached
 <unfinished ...>
[pid  5850] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5849] <... clone3 resumed> => {parent_tid=[5850]}, 88) = 5850
[pid  5850] set_robust_list(0x7fcc24c439a0, 24) = 0
[pid  5850] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5850] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5849] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5849] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5850] <... futex resumed>)        = 0
[pid  5849] <... futex resumed>)        = 1
[pid  5850] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5849] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5850] <... memfd_create resumed>) = 3
[pid  5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5850] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5850] close(3)                    = 0
[pid  5850] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5849] <... futex resumed>)        = 0
[pid  5850] unlink(NULL <unfinished ...>
[pid  5849] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5850] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5849] <... futex resumed>)        = 0
[pid  5850] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5849] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5850] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5849] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5850] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5850] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5850] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5849] <... futex resumed>)        = 0
[pid  5849] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5849] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5850] <... futex resumed>)        = 0
[pid  5849] <... futex resumed>)        = 1
[pid  5850] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5849] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5850] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5850] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5849] <... futex resumed>)        = 0
[pid  5849] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5849] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5850] <... futex resumed>)        = 1
[pid  5850] mkdirat(AT_FDCWD, "./bus", 000) = -1 EEXIST (File exists)
[pid  5850] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5850] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5849] <... futex resumed>)        = 0
[pid  5849] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5850] <... futex resumed>)        = 0
[pid  5849] <... futex resumed>)        = 1
[pid  5850] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5849] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5850] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5850] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5849] <... futex resumed>)        = 0
[pid  5850] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5849] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5850] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5849] <... futex resumed>)        = 0
[pid  5850] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5849] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5850] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5850] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5850] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5849] <... futex resumed>)        = 0
[pid  5849] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5850] <... futex resumed>)        = 0
[pid  5849] <... futex resumed>)        = 1
[pid  5850] chown(NULL, 0, 0 <unfinished ...>
[pid  5849] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5850] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5850] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5850] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5849] <... futex resumed>)        = 0
[pid  5849] exit_group(0 <unfinished ...>
[pid  5850] <... futex resumed>)        = ?
[pid  5849] <... exit_group resumed>)   = ?
[pid  5850] +++ exited with 0 +++
[   69.881366][ T5850] overlayfs: workdir and upperdir must reside under the same mount
[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=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 5851 attached
, child_tidptr=0x555592081690) = 5851
[pid  5851] set_robust_list(0x5555920816a0, 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
[pid  5851] write(1, "executing program\n", 18executing program
) = 18
[pid  5851] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5851] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5851] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5851] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5851] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5851] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5851] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5852 attached
 <unfinished ...>
[pid  5852] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5851] <... clone3 resumed> => {parent_tid=[5852]}, 88) = 5852
[pid  5852] set_robust_list(0x7fcc24c439a0, 24) = 0
[pid  5851] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5852] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5851] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5852] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5851] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5852] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5851] <... futex resumed>)        = 0
[pid  5852] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5851] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5852] <... memfd_create resumed>) = 3
[pid  5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5852] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5852] close(3)                    = 0
[pid  5852] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5851] <... futex resumed>)        = 0
[pid  5852] <... futex resumed>)        = 1
[pid  5851] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5851] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5852] unlink(NULL)                = -1 EFAULT (Bad address)
[pid  5852] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5852] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5851] <... futex resumed>)        = 0
[pid  5851] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5852] <... futex resumed>)        = 0
[pid  5851] <... futex resumed>)        = 1
[pid  5852] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists)
[pid  5851] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5852] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5851] <... futex resumed>)        = 0
[pid  5852] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5851] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5852] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5852] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5851] <... futex resumed>)        = 0
[pid  5852] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5851] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5852] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5851] <... futex resumed>)        = 0
[pid  5852] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5851] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5852] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5851] <... futex resumed>)        = 0
[pid  5852] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5851] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5852] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5851] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5852] <... futex resumed>)        = 0
[pid  5851] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5852] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5851] <... futex resumed>)        = 0
[pid  5851] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5852] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5852] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5851] <... futex resumed>)        = 0
[pid  5852] <... futex resumed>)        = 1
[pid  5851] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5852] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5851] <... futex resumed>)        = 0
[pid  5852] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5851] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5852] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5851] <... futex resumed>)        = 0
[pid  5852] chown(NULL, 0, 0 <unfinished ...>
[pid  5851] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5852] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5851] <... futex resumed>)        = 0
[pid  5851] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5852] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5851] <... futex resumed>)        = 0
[pid  5852] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5851] exit_group(0 <unfinished ...>
[pid  5852] <... futex resumed>)        = ?
[pid  5851] <... exit_group resumed>)   = ?
[pid  5852] +++ exited with 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=2 /* 0.02 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 5853 attached
, child_tidptr=0x555592081690) = 5853
[pid  5853] set_robust_list(0x5555920816a0, 24) = 0
[pid  5853] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5853] setpgid(0, 0)               = 0
[pid  5853] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5853] write(3, "1000", 4)         = 4
[pid  5853] close(3)                    = 0
[pid  5853] write(1, "executing program\n", 18executing program
) = 18
[pid  5853] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5853] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5853] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5853] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5853] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5853] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5853] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5854 attached
 <unfinished ...>
[pid  5854] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5853] <... clone3 resumed> => {parent_tid=[5854]}, 88) = 5854
[pid  5854] set_robust_list(0x7fcc24c439a0, 24) = 0
[pid  5854] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5854] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5853] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5853] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5854] <... futex resumed>)        = 0
[pid  5853] <... futex resumed>)        = 1
[   70.151755][ T5852] overlayfs: workdir and upperdir must reside under the same mount
[pid  5854] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5853] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5854] <... memfd_create resumed>) = 3
[pid  5854] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5854] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5854] close(3)                    = 0
[pid  5854] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5853] <... futex resumed>)        = 0
[pid  5854] unlink(NULL <unfinished ...>
[pid  5853] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5854] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5853] <... futex resumed>)        = 0
[pid  5854] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5853] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5854] <... futex resumed>)        = 0
[pid  5853] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5854] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5853] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5854] <... futex resumed>)        = 0
[pid  5853] <... futex resumed>)        = 1
[pid  5854] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5853] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5854] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5854] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5854] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5853] <... futex resumed>)        = 0
[pid  5853] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5854] <... futex resumed>)        = 0
[pid  5853] <... futex resumed>)        = 1
[pid  5853] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5854] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5854] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5853] <... futex resumed>)        = 0
[pid  5854] <... futex resumed>)        = 1
[pid  5853] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5854] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5853] <... futex resumed>)        = 0
[pid  5854] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5854] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5853] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5854] <... futex resumed>)        = 0
[pid  5853] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5854] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5853] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5854] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5853] <... futex resumed>)        = 0
[pid  5854] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5853] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5854] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5854] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5853] <... futex resumed>)        = 0
[pid  5854] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5853] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5854] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5853] <... futex resumed>)        = 0
[pid  5854] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5853] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5854] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5853] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5854] <... futex resumed>)        = 0
[pid  5853] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5854] chown(NULL, 0, 0 <unfinished ...>
[pid  5853] <... futex resumed>)        = 0
[pid  5854] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5853] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5854] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5853] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5854] <... futex resumed>)        = 0
[pid  5853] exit_group(0 <unfinished ...>
[pid  5854] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid  5853] <... exit_group resumed>)   = ?
[pid  5854] +++ exited with 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 */} ---
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=0x555592081690) = 5855
[pid  5855] set_robust_list(0x5555920816a0, 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
[pid  5855] write(1, "executing program\n", 18executing program
) = 18
[pid  5855] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5855] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5855] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5855] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5855] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5855] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5855] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5856 attached
[   70.403804][ T5854] overlayfs: workdir and upperdir must reside under the same mount
 <unfinished ...>
[pid  5856] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5855] <... clone3 resumed> => {parent_tid=[5856]}, 88) = 5856
[pid  5856] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5855] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5856] <... set_robust_list resumed>) = 0
[pid  5855] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5856] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5855] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5856] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5855] <... futex resumed>)        = 0
[pid  5855] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5856] <... memfd_create resumed>) = 3
[pid  5856] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5856] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5856] close(3)                    = 0
[pid  5856] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5855] <... futex resumed>)        = 0
[pid  5856] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5855] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5856] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5855] <... futex resumed>)        = 0
[pid  5856] unlink(NULL <unfinished ...>
[pid  5855] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5856] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5856] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5855] <... futex resumed>)        = 0
[pid  5856] <... futex resumed>)        = 1
[pid  5855] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5856] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5855] <... futex resumed>)        = 0
[pid  5856] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5855] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5856] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5855] <... futex resumed>)        = 0
[pid  5856] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5855] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5856] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5855] <... futex resumed>)        = 0
[pid  5856] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5855] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5856] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5856] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5855] <... futex resumed>)        = 0
[pid  5856] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5855] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5856] <... futex resumed>)        = 0
[pid  5855] <... futex resumed>)        = 1
[pid  5856] mkdirat(AT_FDCWD, "./bus", 000) = -1 EEXIST (File exists)
[pid  5855] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5856] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5855] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5856] <... futex resumed>)        = 0
[pid  5855] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5856] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5855] <... futex resumed>)        = 0
[pid  5855] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5856] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5856] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5856] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5855] <... futex resumed>)        = 0
[pid  5855] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5856] <... futex resumed>)        = 0
[pid  5855] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5856] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW) = -1 EFAULT (Bad address)
[pid  5856] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5856] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5855] <... futex resumed>)        = 0
[pid  5856] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5855] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5856] chown(NULL, 0, 0)           = -1 EFAULT (Bad address)
[pid  5855] <... futex resumed>)        = 0
[pid  5856] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5855] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5856] <... futex resumed>)        = 0
[pid  5855] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5856] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5855] exit_group(0 <unfinished ...>
[pid  5856] <... futex resumed>)        = ?
[pid  5855] <... exit_group resumed>)   = ?
[pid  5856] +++ exited with 0 +++
[   70.617379][ T5856] overlayfs: workdir and upperdir must reside under the same mount
[pid  5855] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5855, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=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, child_tidptr=0x555592081690) = 5857
./strace-static-x86_64: Process 5857 attached
[pid  5857] set_robust_list(0x5555920816a0, 24) = 0
[pid  5857] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5857] setpgid(0, 0)               = 0
[pid  5857] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5857] write(3, "1000", 4)         = 4
[pid  5857] close(3)                    = 0
executing program
[pid  5857] write(1, "executing program\n", 18) = 18
[pid  5857] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5857] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5857] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5857] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5857] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5857] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5857] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5858 attached
 => {parent_tid=[5858]}, 88) = 5858
[pid  5858] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053 <unfinished ...>
[pid  5857] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5858] <... rseq resumed>)         = 0
[pid  5857] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5858] set_robust_list(0x7fcc24c439a0, 24) = 0
[pid  5858] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5857] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5858] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5857] <... futex resumed>)        = 0
[pid  5858] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5857] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5858] <... memfd_create resumed>) = 3
[pid  5858] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5858] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5858] close(3)                    = 0
[pid  5858] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5857] <... futex resumed>)        = 0
[pid  5858] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5857] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5857] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5858] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5858] unlink(NULL)                = -1 EFAULT (Bad address)
[pid  5858] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5857] <... futex resumed>)        = 0
[pid  5858] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5857] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5858] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5857] <... futex resumed>)        = 0
[pid  5858] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5857] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5858] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5858] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5857] <... futex resumed>)        = 0
[pid  5858] <... futex resumed>)        = 1
[pid  5857] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5858] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5857] <... futex resumed>)        = 0
[pid  5858] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5857] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5858] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5857] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5858] <... futex resumed>)        = 0
[pid  5857] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5858] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5857] <... futex resumed>)        = 0
[pid  5858] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5857] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5858] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5857] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5858] <... futex resumed>)        = 0
[pid  5857] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5858] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5857] <... futex resumed>)        = 0
[pid  5857] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5858] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5858] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5857] <... futex resumed>)        = 0
[pid  5857] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5858] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5857] <... futex resumed>)        = 0
[pid  5858] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5858] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5857] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5858] <... futex resumed>)        = 0
[pid  5857] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5858] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5857] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5858] chown(NULL, 0, 0)           = -1 EFAULT (Bad address)
[pid  5857] <... futex resumed>)        = 0
[pid  5858] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5857] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5858] <... futex resumed>)        = 0
[pid  5857] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5858] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5857] exit_group(0 <unfinished ...>
[pid  5858] <... futex resumed>)        = ?
[pid  5857] <... exit_group resumed>)   = ?
[pid  5858] +++ exited with 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=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   70.976055][ T5858] 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 5859 attached
, child_tidptr=0x555592081690) = 5859
[pid  5859] set_robust_list(0x5555920816a0, 24) = 0
[pid  5859] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5859] setpgid(0, 0)               = 0
[pid  5859] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5859] write(3, "1000", 4)         = 4
[pid  5859] close(3)                    = 0
executing program
[pid  5859] write(1, "executing program\n", 18) = 18
[pid  5859] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5859] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5859] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5859] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5859] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5859] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5859] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5860 attached
 <unfinished ...>
[pid  5860] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5859] <... clone3 resumed> => {parent_tid=[5860]}, 88) = 5860
[pid  5860] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5859] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5860] <... set_robust_list resumed>) = 0
[pid  5859] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5860] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5859] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5860] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5860] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5859] <... futex resumed>)        = 0
[pid  5860] <... memfd_create resumed>) = 3
[pid  5859] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5860] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5860] close(3)                    = 0
[pid  5860] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5860] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5859] <... futex resumed>)        = 0
[pid  5860] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5859] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5860] unlink(NULL)                = -1 EFAULT (Bad address)
[pid  5859] <... futex resumed>)        = 0
[pid  5860] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5859] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5860] <... futex resumed>)        = 0
[pid  5859] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5860] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5859] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5860] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5860] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5859] <... futex resumed>)        = 0
[pid  5860] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5859] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5860] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5859] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5860] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5859] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5860] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5859] <... futex resumed>)        = 0
[pid  5860] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5859] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5860] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5860] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5859] <... futex resumed>)        = 0
[pid  5860] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5859] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5859] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5860] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5860] mkdirat(AT_FDCWD, "./bus", 000) = -1 EEXIST (File exists)
[pid  5860] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5859] <... futex resumed>)        = 0
[pid  5860] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5859] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5860] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5859] <... futex resumed>)        = 0
[pid  5860] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = -1 EINVAL (Invalid argument)
[pid  5859] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5860] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5859] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5860] <... futex resumed>)        = 0
[pid  5859] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5860] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5859] <... futex resumed>)        = 0
[pid  5860] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5859] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5860] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5859] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5860] <... futex resumed>)        = 0
[pid  5859] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5860] chown(NULL, 0, 0 <unfinished ...>
[pid  5859] <... futex resumed>)        = 0
[pid  5860] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5859] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5860] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5859] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5860] <... futex resumed>)        = 0
[pid  5859] exit_group(0 <unfinished ...>
[pid  5860] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid  5859] <... exit_group resumed>)   = ?
[pid  5860] +++ exited with 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=1 /* 0.01 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)
[   71.414885][ T5860] 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 5861 attached
, child_tidptr=0x555592081690) = 5861
[pid  5861] set_robust_list(0x5555920816a0, 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
executing program
[pid  5861] close(3)                    = 0
[pid  5861] write(1, "executing program\n", 18) = 18
[pid  5861] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5861] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5861] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5861] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5861] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5861] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5861] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5862 attached
 => {parent_tid=[5862]}, 88) = 5862
[pid  5862] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053 <unfinished ...>
[pid  5861] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5862] <... rseq resumed>)         = 0
[pid  5861] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5862] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5861] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5862] <... set_robust_list resumed>) = 0
[pid  5861] <... futex resumed>)        = 0
[pid  5862] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5861] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5862] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5862] memfd_create("syzkaller", 0) = 3
[pid  5862] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5862] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5862] close(3)                    = 0
[pid  5862] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5862] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5861] <... futex resumed>)        = 0
[pid  5862] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5861] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5862] unlink(NULL <unfinished ...>
[pid  5861] <... futex resumed>)        = 0
[pid  5862] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5861] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5862] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5861] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5862] <... futex resumed>)        = 0
[pid  5861] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5862] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5861] <... futex resumed>)        = 0
[pid  5862] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5861] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5862] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5861] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5862] <... futex resumed>)        = 0
[pid  5861] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5862] mkdirat(AT_FDCWD, "./file0", 000) = -1 EEXIST (File exists)
[pid  5861] <... futex resumed>)        = 0
[pid  5862] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5861] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5862] <... futex resumed>)        = 0
[pid  5861] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5862] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5861] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5862] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5861] <... futex resumed>)        = 0
[pid  5862] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5861] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5862] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5862] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5862] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5861] <... futex resumed>)        = 0
[pid  5862] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5861] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5862] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5861] <... futex resumed>)        = 0
[pid  5861] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5862] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5862] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5861] <... futex resumed>)        = 0
[pid  5862] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5861] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5862] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5861] <... futex resumed>)        = 0
[pid  5862] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5861] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5862] <... futex resumed>)        = 0
[pid  5862] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5861] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5861] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5862] <... futex resumed>)        = 0
[pid  5861] <... futex resumed>)        = 1
[pid  5862] chown(NULL, 0, 0 <unfinished ...>
[pid  5861] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5862] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5862] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5862] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5861] <... futex resumed>)        = 0
[pid  5861] exit_group(0)               = ?
[pid  5862] <... futex resumed>)        = ?
[pid  5862] +++ exited with 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=8 /* 0.08 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   71.747370][ T5862] 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 5863 attached
, child_tidptr=0x555592081690) = 5863
[pid  5863] set_robust_list(0x5555920816a0, 24) = 0
[pid  5863] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5863] setpgid(0, 0)               = 0
[pid  5863] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5863] write(3, "1000", 4)         = 4
[pid  5863] close(3)                    = 0
executing program
[pid  5863] write(1, "executing program\n", 18) = 18
[pid  5863] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5863] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5863] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5863] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5863] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5863] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5863] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5864 attached
 <unfinished ...>
[pid  5864] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5864] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5863] <... clone3 resumed> => {parent_tid=[5864]}, 88) = 5864
[pid  5864] <... set_robust_list resumed>) = 0
[pid  5863] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5864] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5863] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5864] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5863] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5864] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5863] <... futex resumed>)        = 0
[pid  5863] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5864] <... memfd_create resumed>) = 3
[pid  5864] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[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(0x7fcc1c800000, 138412032) = 0
[pid  5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5864] close(3)                    = 0
[pid  5864] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5863] <... futex resumed>)        = 0
[pid  5863] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5864] <... futex resumed>)        = 1
[pid  5863] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5864] unlink(NULL)                = -1 EFAULT (Bad address)
[pid  5864] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5863] <... futex resumed>)        = 0
[pid  5864] <... futex resumed>)        = 1
[pid  5863] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5864] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5863] <... futex resumed>)        = 0
[pid  5864] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5863] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5864] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5863] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5864] <... futex resumed>)        = 0
[pid  5863] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5864] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5863] <... futex resumed>)        = 0
[pid  5864] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5863] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5864] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5863] <... futex resumed>)        = 0
[pid  5864] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5863] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5864] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5863] <... futex resumed>)        = 0
[pid  5864] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5863] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5864] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5863] <... futex resumed>)        = 0
[pid  5864] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5863] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5864] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5863] <... futex resumed>)        = 0
[pid  5864] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5863] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5864] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5864] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5863] <... futex resumed>)        = 0
[pid  5864] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5863] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5864] <... futex resumed>)        = 0
[pid  5863] <... futex resumed>)        = 1
[pid  5864] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW) = -1 EFAULT (Bad address)
[pid  5863] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5864] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5864] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5863] <... futex resumed>)        = 0
[pid  5863] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5864] <... futex resumed>)        = 0
[pid  5863] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5864] chown(NULL, 0, 0)           = -1 EFAULT (Bad address)
[pid  5864] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5863] <... futex resumed>)        = 0
[pid  5864] <... futex resumed>)        = 1
[pid  5863] exit_group(0 <unfinished ...>
[pid  5864] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid  5863] <... exit_group resumed>)   = ?
[pid  5864] +++ exited with 0 +++
[pid  5863] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5863, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   72.103524][ T5864] overlayfs: workdir and upperdir must reside under the same mount
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5865 attached
, child_tidptr=0x555592081690) = 5865
[pid  5865] set_robust_list(0x5555920816a0, 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] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5865] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5865] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5865] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5865] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5865] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5865] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5866 attached
 <unfinished ...>
[pid  5866] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5865] <... clone3 resumed> => {parent_tid=[5866]}, 88) = 5866
[pid  5866] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5865] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5866] <... set_robust_list resumed>) = 0
[pid  5865] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5866] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5865] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5866] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5865] <... futex resumed>)        = 0
[pid  5866] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5865] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5866] <... memfd_create resumed>) = 3
[pid  5866] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[pid  5866] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5866] munmap(0x7fcc1c800000, 138412032) = 0
[pid  5866] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5866] close(3)                    = 0
[pid  5866] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5865] <... futex resumed>)        = 0
[pid  5866] <... futex resumed>)        = 1
[pid  5865] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5866] unlink(NULL <unfinished ...>
[pid  5865] <... futex resumed>)        = 0
[pid  5866] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5865] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5866] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5865] <... futex resumed>)        = 0
[pid  5866] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5865] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5866] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5865] <... futex resumed>)        = 0
[pid  5866] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5865] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5866] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5865] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5866] <... futex resumed>)        = 0
[pid  5865] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5866] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5865] <... futex resumed>)        = 0
[pid  5866] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5865] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5866] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5865] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5866] <... futex resumed>)        = 0
[pid  5865] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5866] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5865] <... futex resumed>)        = 0
[pid  5866] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5865] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5866] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5865] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5866] <... futex resumed>)        = 0
[pid  5865] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5866] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5865] <... futex resumed>)        = 0
[pid  5865] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5866] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5866] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5865] <... futex resumed>)        = 0
[pid  5866] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5865] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5866] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5865] <... futex resumed>)        = 0
[pid  5866] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW) = -1 EFAULT (Bad address)
[pid  5865] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5866] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5865] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5866] <... futex resumed>)        = 0
[pid  5866] chown(NULL, 0, 0 <unfinished ...>
[pid  5865] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5866] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5865] <... futex resumed>)        = 0
[pid  5866] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5865] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5866] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5865] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5865] exit_group(0 <unfinished ...>
[pid  5866] <... futex resumed>)        = ?
[pid  5865] <... exit_group resumed>)   = ?
[pid  5866] +++ exited with 0 +++
[pid  5865] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5865, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=7 /* 0.07 s */} ---
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
[   72.409674][ T5866] 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 5867 attached
, child_tidptr=0x555592081690) = 5867
[pid  5867] set_robust_list(0x5555920816a0, 24) = 0
[pid  5867] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5867] setpgid(0, 0)               = 0
[pid  5867] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5867] write(3, "1000", 4)         = 4
[pid  5867] close(3)                    = 0
[pid  5867] write(1, "executing program\n", 18executing program
) = 18
[pid  5867] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5867] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5867] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5867] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5867] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5867] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5867] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5868 attached
 <unfinished ...>
[pid  5868] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5867] <... clone3 resumed> => {parent_tid=[5868]}, 88) = 5868
[pid  5868] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5867] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5868] <... set_robust_list resumed>) = 0
[pid  5867] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5868] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5867] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5868] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5867] <... futex resumed>)        = 0
[pid  5868] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5867] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5868] <... memfd_create resumed>) = 3
[pid  5868] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[pid  5868] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5868] munmap(0x7fcc1c800000, 138412032) = 0
[pid  5868] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5868] close(3)                    = 0
[pid  5868] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5868] <... futex resumed>)        = 1
[pid  5867] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5868] unlink(NULL <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5868] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5867] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5868] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5868] <... futex resumed>)        = 1
[pid  5867] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5868] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5868] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5867] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5868] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5868] <... futex resumed>)        = 1
[pid  5867] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5868] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5868] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5867] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5868] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5867] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5868] <... futex resumed>)        = 0
[pid  5867] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5868] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5868] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5867] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5868] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5867] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5868] <... futex resumed>)        = 0
[pid  5867] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5868] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5867] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5868] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5868] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5868] <... futex resumed>)        = 1
[pid  5867] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5868] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5868] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5867] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5868] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5868] <... futex resumed>)        = 1
[pid  5867] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5868] chown(NULL, 0, 0 <unfinished ...>
[pid  5867] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5868] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5868] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5868] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5867] <... futex resumed>)        = 0
[pid  5867] exit_group(0 <unfinished ...>
[pid  5868] <... futex resumed>)        = ?
[pid  5867] <... exit_group resumed>)   = ?
[pid  5868] +++ exited with 0 +++
[pid  5867] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5867, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=8 /* 0.08 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   72.773935][ T5868] 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 5869 attached
, child_tidptr=0x555592081690) = 5869
[pid  5869] set_robust_list(0x5555920816a0, 24) = 0
[pid  5869] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5869] setpgid(0, 0)               = 0
[pid  5869] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5869] write(3, "1000", 4)         = 4
[pid  5869] close(3)                    = 0
[pid  5869] write(1, "executing program\n", 18executing program
) = 18
[pid  5869] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5869] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5869] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5869] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5869] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5869] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5869] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5870 attached
 <unfinished ...>
[pid  5870] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5870] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5869] <... clone3 resumed> => {parent_tid=[5870]}, 88) = 5870
[pid  5870] <... set_robust_list resumed>) = 0
[pid  5869] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5870] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5869] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5870] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5869] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5870] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5869] <... futex resumed>)        = 0
[pid  5870] <... memfd_create resumed>) = 3
[pid  5870] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[pid  5869] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5870] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5870] munmap(0x7fcc1c800000, 138412032) = 0
[pid  5870] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5870] close(3)                    = 0
[pid  5870] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5869] <... futex resumed>)        = 0
[pid  5870] <... futex resumed>)        = 1
[pid  5869] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5870] unlink(NULL <unfinished ...>
[pid  5869] <... futex resumed>)        = 0
[pid  5870] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5869] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5870] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5869] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5870] <... futex resumed>)        = 0
[pid  5869] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5870] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5869] <... futex resumed>)        = 0
[pid  5870] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5869] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5870] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5869] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5870] <... futex resumed>)        = 0
[pid  5869] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5870] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5869] <... futex resumed>)        = 0
[pid  5870] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5869] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5870] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5869] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5870] <... futex resumed>)        = 0
[pid  5869] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5870] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5869] <... futex resumed>)        = 0
[pid  5870] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5869] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5870] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5870] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5869] <... futex resumed>)        = 0
[pid  5869] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5870] <... futex resumed>)        = 0
[pid  5869] <... futex resumed>)        = 1
[pid  5870] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5869] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5870] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5870] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5869] <... futex resumed>)        = 0
[pid  5870] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5869] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5870] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5869] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5870] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5870] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5869] <... futex resumed>)        = 0
[pid  5870] <... futex resumed>)        = 1
[pid  5869] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5869] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5870] chown(NULL, 0, 0)           = -1 EFAULT (Bad address)
[pid  5870] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5869] <... futex resumed>)        = 0
[pid  5870] <... futex resumed>)        = 1
[pid  5869] exit_group(0 <unfinished ...>
[pid  5870] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid  5869] <... exit_group resumed>)   = ?
[pid  5870] +++ exited with 0 +++
[pid  5869] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5869, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=7 /* 0.07 s */} ---
[   73.117189][ T5870] overlayfs: workdir and upperdir must reside under the same mount
restart_syscall(<... resuming interrupted clone ...>) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = -1 EBUSY (Device or resource busy)
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5871 attached
, child_tidptr=0x555592081690) = 5871
[pid  5871] set_robust_list(0x5555920816a0, 24) = 0
[pid  5871] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5871] setpgid(0, 0)               = 0
[pid  5871] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5871] write(3, "1000", 4)         = 4
[pid  5871] close(3)                    = 0
[pid  5871] write(1, "executing program\n", 18executing program
) = 18
[pid  5871] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5871] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5871] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5871] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5871] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5871] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5871] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5872 attached
 => {parent_tid=[5872]}, 88) = 5872
[pid  5872] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053 <unfinished ...>
[pid  5871] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5872] <... rseq resumed>)         = 0
[pid  5872] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5871] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5872] <... set_robust_list resumed>) = 0
[pid  5871] <... futex resumed>)        = 0
[pid  5872] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5871] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5872] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5872] memfd_create("syzkaller", 0) = 3
[pid  5872] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[pid  5872] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5872] munmap(0x7fcc1c800000, 138412032) = 0
[pid  5872] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5872] close(3)                    = 0
[pid  5872] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5871] <... futex resumed>)        = 0
[pid  5872] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5871] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5872] unlink(NULL <unfinished ...>
[pid  5871] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5872] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5872] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5871] <... futex resumed>)        = 0
[pid  5872] <... futex resumed>)        = 1
[pid  5871] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5872] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5871] <... futex resumed>)        = 0
[pid  5872] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5871] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5872] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5871] <... futex resumed>)        = 0
[pid  5871] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5872] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5871] <... futex resumed>)        = 0
[pid  5872] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5871] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5872] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5871] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5872] <... futex resumed>)        = 0
[pid  5871] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5872] mkdirat(AT_FDCWD, "./bus", 000) = -1 EEXIST (File exists)
[pid  5871] <... futex resumed>)        = 0
[pid  5872] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5871] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5872] <... futex resumed>)        = 0
[pid  5871] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5872] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5871] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5872] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5872] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5871] <... futex resumed>)        = 0
[pid  5871] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5872] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5872] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5871] <... futex resumed>)        = 0
[pid  5872] <... futex resumed>)        = 1
[pid  5871] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5872] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5871] <... futex resumed>)        = 0
[pid  5872] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5871] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5872] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5871] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5872] <... futex resumed>)        = 0
[pid  5871] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5872] chown(NULL, 0, 0 <unfinished ...>
[pid  5871] <... futex resumed>)        = 0
[pid  5872] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5872] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5871] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5872] <... futex resumed>)        = 0
[pid  5871] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5872] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5871] exit_group(0 <unfinished ...>
[pid  5872] <... futex resumed>)        = ?
[pid  5872] +++ exited with 0 +++
[pid  5871] <... exit_group resumed>)   = ?
[pid  5871] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5871, si_uid=0, si_status=0, si_utime=0, si_stime=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 5873 attached
, child_tidptr=0x555592081690) = 5873
[   73.478804][ T5872] overlayfs: workdir and upperdir must reside under the same mount
[pid  5873] set_robust_list(0x5555920816a0, 24) = 0
[pid  5873] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5873] setpgid(0, 0)               = 0
[pid  5873] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5873] write(3, "1000", 4)         = 4
[pid  5873] close(3)                    = 0
[pid  5873] write(1, "executing program\n", 18executing program
) = 18
[pid  5873] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5873] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5873] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5873] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5873] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5873] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5873] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5874 attached
 <unfinished ...>
[pid  5874] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5874] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5873] <... clone3 resumed> => {parent_tid=[5874]}, 88) = 5874
[pid  5874] <... set_robust_list resumed>) = 0
[pid  5873] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5874] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5873] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5874] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5873] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5874] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5873] <... futex resumed>)        = 0
[pid  5873] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5874] <... memfd_create resumed>) = 3
[pid  5874] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[pid  5874] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5874] munmap(0x7fcc1c800000, 138412032) = 0
[pid  5874] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5874] close(3)                    = 0
[pid  5874] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5873] <... futex resumed>)        = 0
[pid  5874] <... futex resumed>)        = 1
[pid  5873] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5874] unlink(NULL <unfinished ...>
[pid  5873] <... futex resumed>)        = 0
[pid  5874] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5873] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5874] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5873] <... futex resumed>)        = 0
[pid  5874] <... futex resumed>)        = 1
[pid  5873] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5874] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5873] <... futex resumed>)        = 0
[pid  5874] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5873] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5874] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5873] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5874] <... futex resumed>)        = 0
[pid  5873] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5874] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5873] <... futex resumed>)        = 0
[pid  5874] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5873] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5874] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5873] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5874] <... futex resumed>)        = 0
[pid  5873] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5874] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5873] <... futex resumed>)        = 0
[pid  5874] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5873] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5874] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5873] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5873] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5874] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5873] <... futex resumed>)        = 0
[pid  5873] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5874] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5874] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5873] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5874] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5873] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5874] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5873] <... futex resumed>)        = 0
[pid  5874] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5873] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5874] <... futex resumed>)        = 0
[pid  5873] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5874] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5873] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5874] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5873] <... futex resumed>)        = 0
[pid  5874] chown(NULL, 0, 0 <unfinished ...>
[pid  5873] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5874] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5874] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5873] <... futex resumed>)        = 0
[pid  5874] <... futex resumed>)        = 1
[pid  5873] exit_group(0 <unfinished ...>
[pid  5874] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid  5873] <... exit_group resumed>)   = ?
[pid  5874] +++ exited with 0 +++
[pid  5873] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5873, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=7 /* 0.07 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   73.832842][ T5874] 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 5875 attached
, child_tidptr=0x555592081690) = 5875
[pid  5875] set_robust_list(0x5555920816a0, 24) = 0
[pid  5875] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5875] setpgid(0, 0)               = 0
[pid  5875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5875] write(3, "1000", 4)         = 4
[pid  5875] close(3)                    = 0
executing program
[pid  5875] write(1, "executing program\n", 18) = 18
[pid  5875] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5875] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5875] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5875] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5875] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5875] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5875] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5876 attached
 <unfinished ...>
[pid  5876] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5875] <... clone3 resumed> => {parent_tid=[5876]}, 88) = 5876
[pid  5876] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5875] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5876] <... set_robust_list resumed>) = 0
[pid  5875] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5876] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5876] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5875] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5876] <... futex resumed>)        = 0
[pid  5875] <... futex resumed>)        = 1
[pid  5876] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5875] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5876] <... memfd_create resumed>) = 3
[pid  5876] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[pid  5876] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216
[pid  5876] munmap(0x7fcc1c800000, 138412032) = 0
[pid  5876] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5876] close(3)                    = 0
[pid  5876] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5875] <... futex resumed>)        = 0
[pid  5876] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5875] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5876] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5875] <... futex resumed>)        = 0
[pid  5875] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5876] unlink(NULL)                = -1 EFAULT (Bad address)
[pid  5876] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5875] <... futex resumed>)        = 0
[pid  5876] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5875] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5876] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5875] <... futex resumed>)        = 0
[pid  5876] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5875] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5876] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5876] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5875] <... futex resumed>)        = 0
[pid  5876] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5875] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5876] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5875] <... futex resumed>)        = 0
[pid  5876] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5875] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5876] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5876] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5875] <... futex resumed>)        = 0
[pid  5876] <... futex resumed>)        = 1
[pid  5875] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5876] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5875] <... futex resumed>)        = 0
[pid  5876] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5875] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5876] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5875] <... futex resumed>)        = 0
[pid  5876] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  5875] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5876] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5875] <... futex resumed>)        = 0
[pid  5875] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5876] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5876] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5875] <... futex resumed>)        = 0
[pid  5876] <... futex resumed>)        = 1
[pid  5875] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5876] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5875] <... futex resumed>)        = 0
[pid  5876] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5875] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5876] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5875] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5876] <... futex resumed>)        = 0
[pid  5875] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5876] chown(NULL, 0, 0 <unfinished ...>
[pid  5875] <... futex resumed>)        = 0
[pid  5875] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5876] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5876] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5875] <... futex resumed>)        = 0
[pid  5876] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5875] exit_group(0 <unfinished ...>
[pid  5876] <... futex resumed>)        = ?
[pid  5875] <... exit_group resumed>)   = ?
[pid  5876] +++ exited with 0 +++
[pid  5875] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5875, si_uid=0, si_status=0, si_utime=0, 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)
[   74.085373][ T5876] 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 5877 attached
, child_tidptr=0x555592081690) = 5877
[pid  5877] set_robust_list(0x5555920816a0, 24) = 0
[pid  5877] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5877] setpgid(0, 0)               = 0
[pid  5877] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5877] write(3, "1000", 4)         = 4
[pid  5877] close(3)                    = 0
[pid  5877] write(1, "executing program\n", 18executing program
) = 18
[pid  5877] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5877] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5877] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5877] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5877] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5877] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5877] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5878 attached
 <unfinished ...>
[pid  5878] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5878] set_robust_list(0x7fcc24c439a0, 24 <unfinished ...>
[pid  5877] <... clone3 resumed> => {parent_tid=[5878]}, 88) = 5878
[pid  5878] <... set_robust_list resumed>) = 0
[pid  5877] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5878] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid  5877] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5878] <... rt_sigprocmask resumed>NULL, 8) = 0
[pid  5877] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5878] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5877] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5878] <... memfd_create resumed>) = 3
[pid  5878] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[pid  5878] 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  5878] munmap(0x7fcc1c800000, 138412032) = 0
[pid  5878] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5878] close(3)                    = 0
[pid  5878] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5877] <... futex resumed>)        = 0
[pid  5878] <... futex resumed>)        = 1
[pid  5877] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5878] unlink(NULL <unfinished ...>
[pid  5877] <... futex resumed>)        = 0
[pid  5878] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5877] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5878] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5878] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5877] <... futex resumed>)        = 0
[pid  5878] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5877] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5878] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5877] <... futex resumed>)        = 0
[pid  5878] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5878] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5877] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5878] <... futex resumed>)        = 0
[pid  5877] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5878] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5877] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5878] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5877] <... futex resumed>)        = 0
[pid  5878] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5877] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5878] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5878] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5877] <... futex resumed>)        = 0
[pid  5878] <... futex resumed>)        = 1
[pid  5877] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5878] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5877] <... futex resumed>)        = 0
[pid  5878] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5877] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5878] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5877] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5878] <... futex resumed>)        = 0
[pid  5877] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5878] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5877] <... futex resumed>)        = 0
[pid  5877] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5878] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5878] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5877] <... futex resumed>)        = 0
[pid  5878] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5877] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5878] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5877] <... futex resumed>)        = 0
[pid  5878] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW <unfinished ...>
[pid  5877] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5878] <... open resumed>)         = -1 EFAULT (Bad address)
[pid  5878] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5878] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5877] <... futex resumed>)        = 0
[pid  5877] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5878] <... futex resumed>)        = 0
[pid  5877] <... futex resumed>)        = 1
[pid  5878] chown(NULL, 0, 0 <unfinished ...>
[pid  5877] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5878] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5878] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5877] <... futex resumed>)        = 0
[pid  5878] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5877] exit_group(0)               = ?
[pid  5878] <... futex resumed>)        = ?
[pid  5878] +++ exited with 0 +++
[pid  5877] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5877, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=9 /* 0.09 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   74.489704][ T5878] 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 5879 attached
, child_tidptr=0x555592081690) = 5879
[pid  5879] set_robust_list(0x5555920816a0, 24) = 0
[pid  5879] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5879] setpgid(0, 0)               = 0
[pid  5879] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5879] write(3, "1000", 4)         = 4
[pid  5879] close(3)                    = 0
[pid  5879] write(1, "executing program\n", 18executing program
) = 18
[pid  5879] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5879] rt_sigaction(SIGRT_1, {sa_handler=0x7fcc24cb2470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fcc24ca3b20}, NULL, 8) = 0
[pid  5879] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
[pid  5879] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fcc24c23000
[pid  5879] mprotect(0x7fcc24c24000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  5879] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
[pid  5879] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fcc24c43990, parent_tid=0x7fcc24c43990, exit_signal=0, stack=0x7fcc24c23000, stack_size=0x20300, tls=0x7fcc24c436c0}./strace-static-x86_64: Process 5880 attached
 <unfinished ...>
[pid  5880] rseq(0x7fcc24c43fe0, 0x20, 0, 0x53053053) = 0
[pid  5879] <... clone3 resumed> => {parent_tid=[5880]}, 88) = 5880
[pid  5879] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5880] set_robust_list(0x7fcc24c439a0, 24) = 0
[pid  5879] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5880] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid  5879] <... futex resumed>)        = 0
[pid  5879] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} <unfinished ...>
[pid  5880] memfd_create("syzkaller", 0) = 3
[pid  5880] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcc1c800000
[pid  5880] 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  5880] munmap(0x7fcc1c800000, 138412032) = 0
[pid  5880] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5880] close(3)                    = 0
[pid  5880] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5879] <... futex resumed>)        = 0
[pid  5880] <... futex resumed>)        = 1
[pid  5879] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5880] unlink(NULL <unfinished ...>
[pid  5879] <... futex resumed>)        = 0
[pid  5880] <... unlink resumed>)       = -1 EFAULT (Bad address)
[pid  5879] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5880] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5879] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5880] <... futex resumed>)        = 0
[pid  5879] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5880] mkdirat(AT_FDCWD, "./file1", 000 <unfinished ...>
[pid  5879] <... futex resumed>)        = 0
[pid  5880] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5879] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5880] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5879] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5880] <... futex resumed>)        = 0
[pid  5879] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5880] mkdirat(AT_FDCWD, "./file0", 000 <unfinished ...>
[pid  5879] <... futex resumed>)        = 0
[pid  5880] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5880] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5879] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5880] <... futex resumed>)        = 0
[pid  5879] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5880] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5879] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5880] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5879] <... futex resumed>)        = 0
[pid  5880] mkdirat(AT_FDCWD, "./bus", 000 <unfinished ...>
[pid  5879] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5880] <... mkdirat resumed>)      = -1 EEXIST (File exists)
[pid  5880] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5879] <... futex resumed>)        = 0
[pid  5880] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5879] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5880] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5879] <... futex resumed>)        = 0
[pid  5880] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1," <unfinished ...>
[pid  5879] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5880] <... mount resumed>)        = -1 EINVAL (Invalid argument)
[pid  5880] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  5879] <... futex resumed>)        = 0
[pid  5880] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5879] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5880] <... futex resumed>)        = 0
[pid  5879] <... futex resumed>)        = 1
[pid  5880] open(NULL, O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW) = -1 EFAULT (Bad address)
[pid  5879] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5880] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5879] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5880] <... futex resumed>)        = 0
[pid  5879] futex(0x7fcc24d175e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  5880] chown(NULL, 0, 0 <unfinished ...>
[pid  5879] <... futex resumed>)        = 0
[pid  5880] <... chown resumed>)        = -1 EFAULT (Bad address)
[pid  5879] futex(0x7fcc24d175ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  5880] futex(0x7fcc24d175ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  5879] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  5880] futex(0x7fcc24d175e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  5879] exit_group(0 <unfinished ...>
[pid  5880] <... futex resumed>)        = ?
[pid  5879] <... exit_group resumed>)   = ?
[pid  5880] +++ exited with 0 +++
[pid  5879] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5879, si_uid=0, si_status=0, si_utime=0, si_stime=10 /* 0.10 s */} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   74.896888][ T5880] 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 5881 attached
, child_tidptr=0x555592081690) = 5881
[pid  5881] set_robust_list(0x5555920816a0, 24) = 0
[pid  5881] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5881] setpgid(0, 0)               = 0
[pid  5881] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5881] write(3, "1000", 4)         = 4
[pid  5881] close(3)                    = 0
executing program
[pid  5881] write(1, "executing program\n", 18) = 18