./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor414014298

<...>
forked to background, child pid 3178
no interfaces have a carrier
[   27.682184][ T3179] 8021q: adding VLAN 0 to HW filter on device bond0
[   27.697440][ T3179] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: OK

syzkaller
Warning: Permanently added '10.128.1.41' (ECDSA) to the list of known hosts.
execve("./syz-executor414014298", ["./syz-executor414014298"], 0x7fff16611830 /* 10 vars */) = 0
brk(NULL)                               = 0x5555574d5000
brk(0x5555574d5c40)                     = 0x5555574d5c40
arch_prctl(ARCH_SET_FS, 0x5555574d5300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
set_tid_address(0x5555574d55d0)         = 3607
set_robust_list(0x5555574d55e0, 24)     = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7f6c23bc5430, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f6c23bc5b00}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7f6c23bc54d0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f6c23bc5b00}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor414014298", 4096) = 27
brk(0x5555574f6c40)                     = 0x5555574f6c40
brk(0x5555574f7000)                     = 0x5555574f7000
mprotect(0x7f6c23c86000, 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, "/sys/kernel/debug/failslab/ignore-gfp-wait", O_WRONLY|O_CLOEXEC) = 3
write(3, "N", 1)                        = 1
close(3)                                = 0
openat(AT_FDCWD, "/sys/kernel/debug/fail_futex/ignore-private", O_WRONLY|O_CLOEXEC) = 3
write(3, "N", 1)                        = 1
close(3)                                = 0
openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", O_WRONLY|O_CLOEXEC) = 3
write(3, "N", 1)                        = 1
close(3)                                = 0
openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", O_WRONLY|O_CLOEXEC) = 3
write(3, "N", 1)                        = 1
close(3)                                = 0
openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/min-order", O_WRONLY|O_CLOEXEC) = 3
write(3, "0", 1)                        = 1
close(3)                                = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3608 attached
, child_tidptr=0x5555574d55d0) = 3608
[pid  3608] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3608] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3608] setpgid(0, 0)               = 0
[pid  3608] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3608] write(3, "1000", 4)         = 4
[pid  3608] close(3)                    = 0
[pid  3608] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3608] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3608] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3608] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3609], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3609
[pid  3608] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3608] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3609 attached
 <unfinished ...>
[pid  3609] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3609] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3609] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3608] <... futex resumed>)        = 0
[pid  3608] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3608] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3609] <... futex resumed>)        = 1
[pid  3609] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3609] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3608] <... futex resumed>)        = 0
[pid  3608] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3608] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3609] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3609] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3608] <... futex resumed>)        = 0
[pid  3608] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3608] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3609] <... futex resumed>)        = 1
[pid  3609] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3609] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3608] <... futex resumed>)        = 0
[pid  3609] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3608] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3608] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3609] <... ioctl resumed>)        = 0
[pid  3609] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3608] <... futex resumed>)        = 0
[pid  3609] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3608] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3609] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3608] <... futex resumed>)        = 0
[pid  3609] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3608] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3609] <... openat resumed>)       = 7
[pid  3609] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3608] <... futex resumed>)        = 0
[pid  3609] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3608] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3608] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3609] <... ioctl resumed>)        = 0
[pid  3609] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3608] <... futex resumed>)        = 0
[pid  3609] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3608] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3609] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3608] <... futex resumed>)        = 0
[pid  3609] <... openat resumed>)       = 8
[pid  3608] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3609] write(8, "16", 2)           = 2
[pid  3609] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3608] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3608] exit_group(0 <unfinished ...>
[pid  3609] <... ioctl resumed>)        = ?
[pid  3608] <... exit_group resumed>)   = ?
syzkaller login: [   44.849005][ T3609] block nbd0: shutting down sockets
[pid  3609] +++ exited with 0 +++
[pid  3608] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3608, si_uid=0, si_status=0, si_utime=0, si_stime=4} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555574d55d0) = 3613
./strace-static-x86_64: Process 3613 attached
[pid  3613] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3613] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3613] setpgid(0, 0)               = 0
[pid  3613] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3613] write(3, "1000", 4)         = 4
[pid  3613] close(3)                    = 0
[pid  3613] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3613] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3613] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3613] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3614 attached
, parent_tid=[3614], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3614
[pid  3613] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3613] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3614] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3614] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3614] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3613] <... futex resumed>)        = 0
[pid  3614] <... futex resumed>)        = 1
[pid  3613] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3614] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3613] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3614] <... ioctl resumed>)        = 0
[pid  3614] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3613] <... futex resumed>)        = 0
[pid  3613] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3614] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3613] <... futex resumed>)        = 0
[pid  3613] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3614] <... openat resumed>)       = 4
[pid  3614] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3613] <... futex resumed>)        = 0
[pid  3613] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3614] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3613] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3614] <... socketpair resumed>[5, 6]) = 0
[pid  3614] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3613] <... futex resumed>)        = 0
[pid  3614] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3613] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3614] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3613] <... futex resumed>)        = 0
[pid  3614] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3613] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3614] <... ioctl resumed>)        = 0
[pid  3614] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3613] <... futex resumed>)        = 0
[pid  3614] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3613] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3614] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3614] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3613] <... futex resumed>)        = 0
[pid  3614] <... openat resumed>)       = 7
[pid  3613] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3614] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3613] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3614] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3613] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3614] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3613] <... futex resumed>)        = 0
[pid  3614] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3613] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3614] <... ioctl resumed>)        = 0
[pid  3614] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3613] <... futex resumed>)        = 0
[pid  3614] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3613] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3614] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3613] <... futex resumed>)        = 0
[pid  3614] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3613] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3614] <... openat resumed>)       = 8
[pid  3614] write(8, "16", 2)           = 2
[pid  3614] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3613] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   45.000961][ T3614] debugfs: out of free dentries, can not create file 'timeout'
[pid  3613] exit_group(0)               = ?
[pid  3614] <... ioctl resumed>)        = ?
[   45.181692][ T3614] block nbd0: shutting down sockets
[pid  3614] +++ exited with 0 +++
[pid  3613] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3613, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3615 attached
, child_tidptr=0x5555574d55d0) = 3615
[pid  3615] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3615] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3615] setpgid(0, 0)               = 0
[pid  3615] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3615] write(3, "1000", 4)         = 4
[pid  3615] close(3)                    = 0
[pid  3615] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3615] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3615] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3615] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3616 attached
 <unfinished ...>
[pid  3616] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3615] <... clone resumed>, parent_tid=[3616], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3616
[pid  3616] <... set_robust_list resumed>) = 0
[pid  3615] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3616] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3615] <... futex resumed>)        = 0
[pid  3615] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3616] <... openat resumed>)       = 3
[pid  3616] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3615] <... futex resumed>)        = 0
[pid  3616] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3615] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3616] <... ioctl resumed>)        = 0
[pid  3615] <... futex resumed>)        = 0
[pid  3616] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3615] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3616] <... futex resumed>)        = 0
[pid  3615] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3615] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3616] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3615] <... futex resumed>)        = 0
[pid  3616] <... openat resumed>)       = 4
[pid  3615] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3616] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3615] <... futex resumed>)        = 0
[pid  3616] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3615] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3616] <... socketpair resumed>[5, 6]) = 0
[pid  3615] <... futex resumed>)        = 0
[pid  3616] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3615] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3616] <... futex resumed>)        = 0
[pid  3615] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3616] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3615] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3615] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3616] <... ioctl resumed>)        = 0
[pid  3616] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3615] <... futex resumed>)        = 0
[pid  3616] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3615] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3616] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 7
[pid  3615] <... futex resumed>)        = 0
[pid  3616] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3615] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3616] <... futex resumed>)        = 0
[pid  3616] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3615] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3615] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3616] <... futex resumed>)        = 0
[pid  3615] <... futex resumed>)        = 1
[pid  3616] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3615] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3616] <... ioctl resumed>)        = 0
[pid  3616] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3615] <... futex resumed>)        = 0
[pid  3616] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3615] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3616] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3616] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3615] <... futex resumed>)        = 0
[pid  3616] <... openat resumed>)       = 8
[pid  3615] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3616] write(8, "16", 2)           = 2
[pid  3616] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3615] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   45.328842][ T3616] debugfs: out of free dentries, can not create file 'timeout'
[pid  3615] exit_group(0)               = ?
[pid  3616] <... ioctl resumed>)        = ?
[   45.506655][ T3616] block nbd0: shutting down sockets
[pid  3616] +++ exited with 0 +++
[pid  3615] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3615, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3617 attached
, child_tidptr=0x5555574d55d0) = 3617
[pid  3617] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3617] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3617] setpgid(0, 0)               = 0
[pid  3617] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3617] write(3, "1000", 4)         = 4
[pid  3617] close(3)                    = 0
[pid  3617] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3617] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3617] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3617] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3618], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3618
[pid  3617] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3617] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3618 attached
 <unfinished ...>
[pid  3618] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3618] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3618] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3617] <... futex resumed>)        = 0
[pid  3617] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3617] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3618] <... futex resumed>)        = 1
[pid  3618] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3618] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3617] <... futex resumed>)        = 0
[pid  3617] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3617] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3618] <... futex resumed>)        = 1
[pid  3618] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3618] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3617] <... futex resumed>)        = 0
[pid  3617] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3617] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3618] <... futex resumed>)        = 1
[pid  3618] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3618] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3617] <... futex resumed>)        = 0
[pid  3617] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3617] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3618] <... futex resumed>)        = 1
[pid  3618] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3618] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3617] <... futex resumed>)        = 0
[pid  3617] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3618] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3617] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3618] <... openat resumed>)       = 7
[pid  3618] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3617] <... futex resumed>)        = 0
[pid  3618] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3617] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3617] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3618] <... ioctl resumed>)        = 0
[pid  3618] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3617] <... futex resumed>)        = 0
[pid  3618] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3617] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3618] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3617] <... futex resumed>)        = 0
[pid  3618] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3617] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3618] <... openat resumed>)       = 8
[pid  3618] write(8, "16", 2)           = 2
[pid  3618] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3617] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   45.658937][ T3618] debugfs: out of free dentries, can not create file 'timeout'
[pid  3617] exit_group(0 <unfinished ...>
[pid  3618] <... ioctl resumed>)        = ?
[pid  3617] <... exit_group resumed>)   = ?
[pid  3618] +++ exited with 0 +++
[   45.840773][ T3618] block nbd0: shutting down sockets
[pid  3617] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3617, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3619 attached
, child_tidptr=0x5555574d55d0) = 3619
[pid  3619] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3619] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3619] setpgid(0, 0)               = 0
[pid  3619] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3619] write(3, "1000", 4)         = 4
[pid  3619] close(3)                    = 0
[pid  3619] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3619] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3619] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3619] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3620], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3620
[pid  3619] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3619] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3620 attached
 <unfinished ...>
[pid  3620] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3620] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3620] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3619] <... futex resumed>)        = 0
[pid  3620] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3619] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3619] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3620] <... ioctl resumed>)        = 0
[pid  3620] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3619] <... futex resumed>)        = 0
[pid  3619] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3620] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3619] <... futex resumed>)        = 0
[pid  3619] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3620] <... openat resumed>)       = 4
[pid  3620] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3619] <... futex resumed>)        = 0
[pid  3620] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3619] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3619] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3620] <... socketpair resumed>[5, 6]) = 0
[pid  3620] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3619] <... futex resumed>)        = 0
[pid  3619] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3620] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3619] <... futex resumed>)        = 0
[pid  3619] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3620] <... ioctl resumed>)        = 0
[pid  3620] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3619] <... futex resumed>)        = 0
[pid  3620] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3619] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3620] <... openat resumed>)       = 7
[pid  3619] <... futex resumed>)        = 0
[pid  3620] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3619] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3620] <... futex resumed>)        = 0
[pid  3619] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3620] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3619] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3620] <... ioctl resumed>)        = 0
[pid  3620] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3619] <... futex resumed>)        = 0
[pid  3620] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3619] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3620] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3619] <... futex resumed>)        = 0
[pid  3620] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3619] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3620] <... openat resumed>)       = 8
[pid  3620] write(8, "16", 2)           = 2
[pid  3620] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3619] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3619] exit_group(0 <unfinished ...>
[pid  3620] <... ioctl resumed>)        = ?
[pid  3619] <... exit_group resumed>)   = ?
[pid  3620] +++ exited with 0 +++
[pid  3619] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3619, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3621 attached
, child_tidptr=0x5555574d55d0) = 3621
[   46.198225][ T3620] block nbd0: shutting down sockets
[pid  3621] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3621] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3621] setpgid(0, 0)               = 0
[pid  3621] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3621] write(3, "1000", 4)         = 4
[pid  3621] close(3)                    = 0
[pid  3621] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3621] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3621] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3621] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3622], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3622
[pid  3621] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3621] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3622 attached
 <unfinished ...>
[pid  3622] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3622] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3622] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3621] <... futex resumed>)        = 0
[pid  3621] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3621] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3622] <... futex resumed>)        = 1
[pid  3622] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3622] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3621] <... futex resumed>)        = 0
[pid  3621] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3621] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3622] <... futex resumed>)        = 1
[pid  3622] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3622] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3621] <... futex resumed>)        = 0
[pid  3621] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3621] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3622] <... futex resumed>)        = 1
[pid  3622] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3622] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3621] <... futex resumed>)        = 0
[pid  3621] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3621] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3622] <... futex resumed>)        = 1
[pid  3622] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3622] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3621] <... futex resumed>)        = 0
[pid  3622] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3621] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3622] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3621] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3622] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 7
[pid  3622] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3621] <... futex resumed>)        = 0
[pid  3622] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3621] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3621] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3622] <... ioctl resumed>)        = 0
[pid  3622] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3621] <... futex resumed>)        = 0
[pid  3622] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3621] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3622] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3621] <... futex resumed>)        = 0
[pid  3622] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3621] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3622] <... openat resumed>)       = 8
[pid  3622] write(8, "16", 2)           = 2
[pid  3622] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3621] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   46.349058][ T3622] debugfs: out of free dentries, can not create file 'timeout'
[pid  3621] exit_group(0)               = ?
[pid  3622] <... ioctl resumed>)        = ?
[   46.529579][ T3622] block nbd0: shutting down sockets
[pid  3622] +++ exited with 0 +++
[pid  3621] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3621, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3623 attached
, child_tidptr=0x5555574d55d0) = 3623
[pid  3623] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3623] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3623] setpgid(0, 0)               = 0
[pid  3623] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3623] write(3, "1000", 4)         = 4
[pid  3623] close(3)                    = 0
[pid  3623] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3623] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3623] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3623] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3624 attached
 <unfinished ...>
[pid  3624] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3623] <... clone resumed>, parent_tid=[3624], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3624
[pid  3624] <... set_robust_list resumed>) = 0
[pid  3623] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3624] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3623] <... futex resumed>)        = 0
[pid  3624] <... openat resumed>)       = 3
[pid  3623] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3624] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3623] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3624] <... futex resumed>)        = 0
[pid  3623] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3624] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3623] <... futex resumed>)        = 0
[pid  3624] <... ioctl resumed>)        = 0
[pid  3623] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3624] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3623] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3624] <... futex resumed>)        = 0
[pid  3623] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3624] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3623] <... futex resumed>)        = 0
[pid  3624] <... openat resumed>)       = 4
[pid  3623] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3624] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3623] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3624] <... futex resumed>)        = 0
[pid  3623] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3624] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3623] <... futex resumed>)        = 0
[pid  3624] <... socketpair resumed>[5, 6]) = 0
[pid  3623] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3624] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3623] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3624] <... futex resumed>)        = 0
[pid  3623] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3624] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3623] <... futex resumed>)        = 0
[pid  3623] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3624] <... ioctl resumed>)        = 0
[pid  3624] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3623] <... futex resumed>)        = 0
[pid  3624] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3623] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3624] <... openat resumed>)       = 7
[pid  3623] <... futex resumed>)        = 0
[pid  3624] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3623] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3624] <... futex resumed>)        = 0
[pid  3623] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3624] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3623] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3623] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3624] <... ioctl resumed>)        = 0
[pid  3624] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3624] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3623] <... futex resumed>)        = 0
[pid  3623] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3624] <... futex resumed>)        = 0
[pid  3623] <... futex resumed>)        = 1
[pid  3624] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3623] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3624] <... openat resumed>)       = 8
[pid  3624] write(8, "16", 2)           = 2
[pid  3624] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3623] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   46.699637][ T3624] debugfs: out of free dentries, can not create file 'timeout'
[pid  3623] exit_group(0)               = ?
[pid  3624] <... ioctl resumed>)        = ?
[pid  3624] +++ exited with 0 +++
[pid  3623] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3623, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
[   46.877014][ T3624] block nbd0: shutting down sockets
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3625 attached
, child_tidptr=0x5555574d55d0) = 3625
[pid  3625] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3625] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3625] setpgid(0, 0)               = 0
[pid  3625] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3625] write(3, "1000", 4)         = 4
[pid  3625] close(3)                    = 0
[pid  3625] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3625] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3625] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3626], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3626
[pid  3625] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3626 attached
 <unfinished ...>
[pid  3626] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3626] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3626] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3625] <... futex resumed>)        = 0
[pid  3625] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... futex resumed>)        = 1
[pid  3626] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3626] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3625] <... futex resumed>)        = 0
[pid  3625] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... futex resumed>)        = 1
[pid  3626] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3626] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3625] <... futex resumed>)        = 0
[pid  3625] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... futex resumed>)        = 1
[pid  3626] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3626] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3625] <... futex resumed>)        = 0
[pid  3625] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... futex resumed>)        = 1
[pid  3626] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3626] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3626] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3625] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3626] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3625] <... futex resumed>)        = 0
[pid  3626] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3625] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... openat resumed>)       = 7
[pid  3626] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3626] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3625] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3626] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3625] <... futex resumed>)        = 0
[pid  3625] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... ioctl resumed>)        = 0
[pid  3626] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3626] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3625] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3626] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3625] <... futex resumed>)        = 0
[pid  3626] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3625] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... openat resumed>)       = 8
[pid  3626] write(8, "16", 2)           = 2
[pid  3626] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3625] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   47.019528][ T3626] debugfs: out of free dentries, can not create file 'timeout'
[pid  3625] exit_group(0)               = ?
[pid  3626] <... ioctl resumed>)        = ?
[   47.201556][ T3626] block nbd0: shutting down sockets
[pid  3626] +++ exited with 0 +++
[pid  3625] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3625, si_uid=0, si_status=0, si_utime=0, si_stime=4} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3627 attached
, child_tidptr=0x5555574d55d0) = 3627
[pid  3627] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3627] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3627] setpgid(0, 0)               = 0
[pid  3627] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3627] write(3, "1000", 4)         = 4
[pid  3627] close(3)                    = 0
[pid  3627] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3627] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3627] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3627] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3628 attached
 <unfinished ...>
[pid  3628] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3628] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3627] <... clone resumed>, parent_tid=[3628], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3628
[pid  3627] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3628] <... futex resumed>)        = 0
[pid  3628] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3628] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3628] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3627] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3627] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3628] <... futex resumed>)        = 0
[pid  3628] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3628] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3628] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3627] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3627] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3628] <... futex resumed>)        = 0
[pid  3627] <... futex resumed>)        = 1
[pid  3628] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3627] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] <... openat resumed>)       = 4
[pid  3628] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3627] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3628] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3627] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] <... socketpair resumed>[5, 6]) = 0
[pid  3628] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3628] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3627] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3628] <... futex resumed>)        = 0
[pid  3627] <... futex resumed>)        = 1
[pid  3628] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3627] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] <... ioctl resumed>)        = 0
[pid  3628] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3628] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3627] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3628] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 7
[pid  3627] <... futex resumed>)        = 0
[pid  3628] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3627] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] <... futex resumed>)        = 0
[pid  3627] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3628] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3627] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3627] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] <... ioctl resumed>)        = 0
[pid  3628] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3628] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3627] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3628] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3627] <... futex resumed>)        = 0
[pid  3628] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3627] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] <... openat resumed>)       = 8
[pid  3628] write(8, "16", 2)           = 2
[pid  3628] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3627] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   47.381538][ T3628] debugfs: out of free dentries, can not create file 'timeout'
[pid  3627] exit_group(0)               = ?
[pid  3628] <... ioctl resumed>)        = ?
[pid  3628] +++ exited with 0 +++
[pid  3627] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3627, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
[   47.556603][ T3628] block nbd0: shutting down sockets
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3629 attached
, child_tidptr=0x5555574d55d0) = 3629
[pid  3629] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3629] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3629] setpgid(0, 0)               = 0
[pid  3629] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3629] write(3, "1000", 4)         = 4
[pid  3629] close(3)                    = 0
[pid  3629] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3629] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3629] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3629] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3630], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3630
[pid  3629] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3629] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3630 attached
 <unfinished ...>
[pid  3630] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3630] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3630] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3629] <... futex resumed>)        = 0
[pid  3629] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3629] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... futex resumed>)        = 1
[pid  3630] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3630] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3629] <... futex resumed>)        = 0
[pid  3629] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3629] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... futex resumed>)        = 1
[pid  3630] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3630] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3629] <... futex resumed>)        = 0
[pid  3629] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3629] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... futex resumed>)        = 1
[pid  3630] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3630] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3629] <... futex resumed>)        = 0
[pid  3629] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3629] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... futex resumed>)        = 1
[pid  3630] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3630] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3629] <... futex resumed>)        = 0
[pid  3630] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3629] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3630] <... openat resumed>)       = 7
[pid  3629] <... futex resumed>)        = 0
[pid  3630] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3629] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... futex resumed>)        = 0
[pid  3629] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3630] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3629] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3630] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3629] <... futex resumed>)        = 0
[pid  3630] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3629] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... ioctl resumed>)        = 0
[pid  3630] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3629] <... futex resumed>)        = 0
[pid  3630] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3629] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3630] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3629] <... futex resumed>)        = 0
[pid  3630] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3629] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... openat resumed>)       = 8
[pid  3630] write(8, "16", 2)           = 2
[pid  3630] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3629] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   47.679995][ T3630] debugfs: out of free dentries, can not create file 'timeout'
[pid  3629] exit_group(0)               = ?
[pid  3630] <... ioctl resumed>)        = ?
[   47.860150][ T3630] block nbd0: shutting down sockets
[pid  3630] +++ exited with 0 +++
[pid  3629] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3629, si_uid=0, si_status=0, si_utime=0, si_stime=4} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3631 attached
, child_tidptr=0x5555574d55d0) = 3631
[pid  3631] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3631] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3631] setpgid(0, 0)               = 0
[pid  3631] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3631] write(3, "1000", 4)         = 4
[pid  3631] close(3)                    = 0
[pid  3631] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3631] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3631] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3631] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3632 attached
, parent_tid=[3632], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3632
[pid  3631] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3631] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3632] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3632] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3631] <... futex resumed>)        = 0
[pid  3632] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3632] <... ioctl resumed>)        = 0
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... futex resumed>)        = 0
[pid  3631] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3632] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3632] <... openat resumed>)       = 4
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... futex resumed>)        = 0
[pid  3631] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3632] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3632] <... socketpair resumed>[5, 6]) = 0
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... futex resumed>)        = 0
[pid  3631] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3632] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3632] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3631] <... futex resumed>)        = 0
[pid  3632] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... ioctl resumed>)        = 0
[pid  3632] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3631] <... futex resumed>)        = 0
[pid  3632] <... futex resumed>)        = 1
[pid  3631] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3631] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 7
[pid  3632] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3632] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3631] <... futex resumed>)        = 0
[pid  3632] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... ioctl resumed>)        = 0
[pid  3632] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3632] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3631] <... futex resumed>)        = 0
[pid  3632] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3631] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... openat resumed>)       = 8
[pid  3632] write(8, "16", 2)           = 2
[pid  3632] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3631] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   48.028973][ T3632] debugfs: out of free dentries, can not create file 'timeout'
[pid  3631] exit_group(0)               = ?
[pid  3632] <... ioctl resumed>)        = ?
[   48.220753][ T3632] block nbd0: shutting down sockets
[pid  3632] +++ exited with 0 +++
[pid  3631] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3631, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3633 attached
, child_tidptr=0x5555574d55d0) = 3633
[pid  3633] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3633] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3633] setpgid(0, 0)               = 0
[pid  3633] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3633] write(3, "1000", 4)         = 4
[pid  3633] close(3)                    = 0
[pid  3633] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3633] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3633] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3634], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3634
[pid  3633] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3634 attached
 <unfinished ...>
[pid  3634] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3634] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3634] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3633] <... futex resumed>)        = 0
[pid  3633] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... futex resumed>)        = 1
[pid  3634] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3634] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3633] <... futex resumed>)        = 0
[pid  3633] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... futex resumed>)        = 1
[pid  3634] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3634] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3633] <... futex resumed>)        = 0
[pid  3633] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... futex resumed>)        = 1
[pid  3634] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3634] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3633] <... futex resumed>)        = 0
[pid  3633] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... futex resumed>)        = 1
[pid  3634] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3634] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3633] <... futex resumed>)        = 0
[pid  3634] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3633] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3634] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3633] <... futex resumed>)        = 0
[pid  3634] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3633] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... openat resumed>)       = 7
[pid  3634] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3633] <... futex resumed>)        = 0
[pid  3634] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3633] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... ioctl resumed>)        = 0
[pid  3634] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3633] <... futex resumed>)        = 0
[pid  3634] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3633] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3634] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3634] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3633] <... futex resumed>)        = 0
[pid  3634] <... openat resumed>)       = 8
[pid  3634] write(8, "16", 2 <unfinished ...>
[pid  3633] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... write resumed>)        = 2
[pid  3634] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3633] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   48.401788][ T3634] debugfs: out of free dentries, can not create file 'timeout'
[pid  3633] exit_group(0)               = ?
[pid  3634] <... ioctl resumed>)        = ?
[   48.572141][ T3634] block nbd0: shutting down sockets
[pid  3634] +++ exited with 0 +++
[pid  3633] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3633, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3635 attached
, child_tidptr=0x5555574d55d0) = 3635
[pid  3635] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3635] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3635] setpgid(0, 0)               = 0
[pid  3635] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3635] write(3, "1000", 4)         = 4
[pid  3635] close(3)                    = 0
[pid  3635] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3635] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3635] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3636], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3636
[pid  3635] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3636 attached
 <unfinished ...>
[pid  3636] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3636] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3636] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3635] <... futex resumed>)        = 0
[pid  3635] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] <... futex resumed>)        = 1
[pid  3636] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3636] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3635] <... futex resumed>)        = 0
[pid  3635] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] <... futex resumed>)        = 1
[pid  3636] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3636] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3635] <... futex resumed>)        = 0
[pid  3635] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] <... futex resumed>)        = 1
[pid  3636] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3636] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3635] <... futex resumed>)        = 0
[pid  3635] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] <... futex resumed>)        = 1
[pid  3636] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3636] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3636] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3635] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3636] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3635] <... futex resumed>)        = 0
[pid  3636] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3635] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] <... openat resumed>)       = 7
[pid  3636] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3636] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3635] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3636] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3635] <... futex resumed>)        = 0
[pid  3636] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3635] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] <... ioctl resumed>)        = 0
[pid  3636] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3636] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3635] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3636] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3635] <... futex resumed>)        = 0
[pid  3636] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3635] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] <... openat resumed>)       = 8
[pid  3636] write(8, "16", 2)           = 2
[pid  3636] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3635] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   48.719117][ T3636] debugfs: out of free dentries, can not create file 'timeout'
[pid  3635] exit_group(0)               = ?
[pid  3636] <... ioctl resumed>)        = ?
[   48.898728][ T3636] block nbd0: shutting down sockets
[pid  3636] +++ exited with 0 +++
[pid  3635] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3635, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3637 attached
, child_tidptr=0x5555574d55d0) = 3637
[pid  3637] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3637] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3637] setpgid(0, 0)               = 0
[pid  3637] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3637] write(3, "1000", 4)         = 4
[pid  3637] close(3)                    = 0
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3637] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3637] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3637] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3638 attached
, parent_tid=[3638], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3638
[pid  3637] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3638] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3638] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3638] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3638] <... ioctl resumed>)        = 0
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... futex resumed>)        = 0
[pid  3637] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3638] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3638] <... openat resumed>)       = 4
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... futex resumed>)        = 0
[pid  3637] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3638] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3638] <... socketpair resumed>[5, 6]) = 0
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... futex resumed>)        = 0
[pid  3637] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3638] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... ioctl resumed>)        = 0
[pid  3638] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3638] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3637] <... futex resumed>)        = 0
[pid  3638] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... openat resumed>)       = 7
[pid  3638] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3638] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3637] <... futex resumed>)        = 0
[pid  3638] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... ioctl resumed>)        = 0
[pid  3638] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3638] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3637] <... futex resumed>)        = 0
[pid  3638] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... openat resumed>)       = 8
[pid  3638] write(8, "16", 2)           = 2
[pid  3638] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3637] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out)
[pid  3637] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out)
[   49.070167][ T3638] debugfs: out of free dentries, can not create file 'timeout'
[pid  3637] exit_group(0)               = ?
[pid  3638] <... ioctl resumed>)        = ?
[   49.250756][ T3638] block nbd0: shutting down sockets
[pid  3638] +++ exited with 0 +++
[pid  3637] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3637, si_uid=0, si_status=0, si_utime=0, si_stime=4} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3639 attached
, child_tidptr=0x5555574d55d0) = 3639
[pid  3639] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3639] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3639] setpgid(0, 0)               = 0
[pid  3639] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3639] write(3, "1000", 4)         = 4
[pid  3639] close(3)                    = 0
[pid  3639] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3639] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3639] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3639] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3640], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3640
[pid  3639] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3639] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3640 attached
 <unfinished ...>
[pid  3640] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3640] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3640] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3639] <... futex resumed>)        = 0
[pid  3639] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3639] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... futex resumed>)        = 1
[pid  3640] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3640] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3639] <... futex resumed>)        = 0
[pid  3639] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3639] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... futex resumed>)        = 1
[pid  3640] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3640] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3639] <... futex resumed>)        = 0
[pid  3639] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3639] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... futex resumed>)        = 1
[pid  3640] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3640] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3639] <... futex resumed>)        = 0
[pid  3639] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3639] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... futex resumed>)        = 1
[pid  3640] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3640] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3639] <... futex resumed>)        = 0
[pid  3640] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3639] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3640] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3639] <... futex resumed>)        = 0
[pid  3640] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3639] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... openat resumed>)       = 7
[pid  3640] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3639] <... futex resumed>)        = 0
[pid  3640] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3639] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3640] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3639] <... futex resumed>)        = 0
[pid  3640] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3639] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... ioctl resumed>)        = 0
[pid  3640] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3639] <... futex resumed>)        = 0
[pid  3640] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3639] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3640] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3639] <... futex resumed>)        = 0
[pid  3640] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3639] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... openat resumed>)       = 8
[pid  3640] write(8, "16", 2)           = 2
[pid  3640] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3639] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   49.399017][ T3640] debugfs: out of free dentries, can not create file 'timeout'
[pid  3639] exit_group(0)               = ?
[pid  3640] <... ioctl resumed>)        = ?
[   49.581666][ T3640] block nbd0: shutting down sockets
[pid  3640] +++ exited with 0 +++
[pid  3639] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3639, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555574d55d0) = 3641
./strace-static-x86_64: Process 3641 attached
[pid  3641] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3641] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3641] setpgid(0, 0)               = 0
[pid  3641] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3641] write(3, "1000", 4)         = 4
[pid  3641] close(3)                    = 0
[pid  3641] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3641] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3641] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3642], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3642
[pid  3641] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3642 attached
 <unfinished ...>
[pid  3642] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3642] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3642] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3641] <... futex resumed>)        = 0
[pid  3641] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... futex resumed>)        = 1
[pid  3642] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3642] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3641] <... futex resumed>)        = 0
[pid  3641] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... futex resumed>)        = 1
[pid  3642] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3642] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3641] <... futex resumed>)        = 0
[pid  3641] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... futex resumed>)        = 1
[pid  3642] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3642] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3641] <... futex resumed>)        = 0
[pid  3642] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3641] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out)
[pid  3641] futex(0x7f6c23c8c4fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b74000
[pid  3641] mprotect(0x7f6c23b75000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3641] clone(child_stack=0x7f6c23b943f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3643 attached
 <unfinished ...>
[pid  3642] <... ioctl resumed>)        = 0
[pid  3643] set_robust_list(0x7f6c23b949e0, 24 <unfinished ...>
[pid  3642] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3641] <... clone resumed>, parent_tid=[3643], tls=0x7f6c23b94700, child_tidptr=0x7f6c23b949d0) = 3643
[pid  3643] <... set_robust_list resumed>) = 0
[pid  3642] <... futex resumed>)        = 0
[pid  3641] futex(0x7f6c23c8c4f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3643] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3642] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3641] <... futex resumed>)        = 0
[pid  3641] futex(0x7f6c23c8c4fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3643] <... openat resumed>)       = 7
[pid  3643] futex(0x7f6c23c8c4fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3641] <... futex resumed>)        = 0
[pid  3643] futex(0x7f6c23c8c4f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3641] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3642] <... futex resumed>)        = 0
[pid  3641] <... futex resumed>)        = 1
[pid  3642] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3641] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... ioctl resumed>)        = 0
[pid  3642] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3642] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3641] <... futex resumed>)        = 0
[pid  3641] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3642] <... futex resumed>)        = 0
[pid  3641] <... futex resumed>)        = 1
[pid  3642] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3641] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... openat resumed>)       = 8
[pid  3642] write(8, "16", 2)           = 2
[pid  3642] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3641] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   49.740092][ T3642] debugfs: out of free dentries, can not create file 'timeout'
[pid  3641] exit_group(0 <unfinished ...>
[pid  3643] <... futex resumed>)        = ?
[pid  3642] <... ioctl resumed>)        = ?
[pid  3641] <... exit_group resumed>)   = ?
[pid  3642] +++ exited with 0 +++
[   49.919458][ T3642] block nbd0: shutting down sockets
[pid  3643] +++ exited with 0 +++
[pid  3641] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3641, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3644 attached
, child_tidptr=0x5555574d55d0) = 3644
[pid  3644] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3644] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3644] setpgid(0, 0)               = 0
[pid  3644] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3644] write(3, "1000", 4)         = 4
[pid  3644] close(3)                    = 0
[pid  3644] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3644] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3644] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3644] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3645], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3645
[pid  3644] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3644] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3645 attached
 <unfinished ...>
[pid  3645] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3645] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3645] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3644] <... futex resumed>)        = 0
[pid  3644] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3644] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3645] <... futex resumed>)        = 1
[pid  3645] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3645] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3644] <... futex resumed>)        = 0
[pid  3644] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3644] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3645] <... futex resumed>)        = 1
[pid  3645] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3645] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3644] <... futex resumed>)        = 0
[pid  3644] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3644] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3645] <... futex resumed>)        = 1
[pid  3645] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3645] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3644] <... futex resumed>)        = 0
[pid  3644] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3644] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3645] <... futex resumed>)        = 1
[pid  3645] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3645] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3644] <... futex resumed>)        = 0
[pid  3645] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3644] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3645] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3644] <... futex resumed>)        = 0
[pid  3645] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3644] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3645] <... openat resumed>)       = 7
[pid  3645] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3644] <... futex resumed>)        = 0
[pid  3645] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3644] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3644] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3645] <... ioctl resumed>)        = 0
[pid  3645] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3645] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3644] <... futex resumed>)        = 0
[pid  3644] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3645] <... futex resumed>)        = 0
[pid  3644] <... futex resumed>)        = 1
[pid  3645] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 8
[pid  3644] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3645] write(8, "16", 2)           = 2
[pid  3645] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3644] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3644] exit_group(0 <unfinished ...>
[pid  3645] <... ioctl resumed>)        = ?
[pid  3644] <... exit_group resumed>)   = ?
[   50.251481][ T3645] block nbd0: shutting down sockets
[pid  3645] +++ exited with 0 +++
[pid  3644] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3644, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3646 attached
, child_tidptr=0x5555574d55d0) = 3646
[pid  3646] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3646] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3646] setpgid(0, 0)               = 0
[pid  3646] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3646] write(3, "1000", 4)         = 4
[pid  3646] close(3)                    = 0
[pid  3646] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3646] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3646] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3646] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3647], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3647
./strace-static-x86_64: Process 3647 attached
[pid  3646] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3647] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3647] <... set_robust_list resumed>) = 0
[pid  3647] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3647] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3647] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3646] <... futex resumed>)        = 0
[pid  3646] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3647] <... futex resumed>)        = 0
[pid  3646] <... futex resumed>)        = 1
[pid  3647] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3647] <... ioctl resumed>)        = 0
[pid  3647] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3646] <... futex resumed>)        = 0
[pid  3647] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3647] <... openat resumed>)       = 4
[pid  3646] <... futex resumed>)        = 0
[pid  3647] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3647] <... futex resumed>)        = 0
[pid  3646] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3647] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3647] <... socketpair resumed>[5, 6]) = 0
[pid  3646] <... futex resumed>)        = 0
[pid  3647] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3647] <... futex resumed>)        = 0
[pid  3646] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3647] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3646] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3647] <... ioctl resumed>)        = 0
[pid  3647] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3646] <... futex resumed>)        = 0
[pid  3647] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3647] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3646] <... futex resumed>)        = 0
[pid  3647] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3647] <... openat resumed>)       = 7
[pid  3647] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3646] <... futex resumed>)        = 0
[pid  3647] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3647] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3646] <... futex resumed>)        = 0
[pid  3647] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3647] <... ioctl resumed>)        = 0
[pid  3647] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3646] <... futex resumed>)        = 0
[pid  3647] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3647] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3646] <... futex resumed>)        = 0
[pid  3647] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3646] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3647] <... openat resumed>)       = 8
[pid  3647] write(8, "16", 2)           = 2
[pid  3647] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3646] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   50.401538][ T3647] debugfs: out of free dentries, can not create file 'timeout'
[pid  3646] exit_group(0)               = ?
[pid  3647] <... ioctl resumed>)        = ?
[   50.584185][ T3647] block nbd0: shutting down sockets
[pid  3647] +++ exited with 0 +++
[pid  3646] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3646, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3648 attached
, child_tidptr=0x5555574d55d0) = 3648
[pid  3648] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3648] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3648] setpgid(0, 0)               = 0
[pid  3648] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3648] write(3, "1000", 4)         = 4
[pid  3648] close(3)                    = 0
[pid  3648] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3648] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3648] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3648] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3649 attached
, parent_tid=[3649], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3649
[pid  3648] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3649] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3649] <... set_robust_list resumed>) = 0
[pid  3649] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3649] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3648] <... futex resumed>)        = 0
[pid  3649] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3649] <... ioctl resumed>)        = 0
[pid  3648] <... futex resumed>)        = 0
[pid  3649] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3649] <... futex resumed>)        = 0
[pid  3648] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3649] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3649] <... openat resumed>)       = 4
[pid  3648] <... futex resumed>)        = 0
[pid  3649] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3649] <... futex resumed>)        = 0
[pid  3648] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3649] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3649] <... socketpair resumed>[5, 6]) = 0
[pid  3648] <... futex resumed>)        = 0
[pid  3649] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3649] <... futex resumed>)        = 0
[pid  3648] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3649] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3648] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3649] <... ioctl resumed>)        = 0
[pid  3649] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3648] <... futex resumed>)        = 0
[pid  3649] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3649] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3648] <... futex resumed>)        = 0
[pid  3649] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3649] <... openat resumed>)       = 7
[pid  3649] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3648] <... futex resumed>)        = 0
[pid  3649] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3649] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3648] <... futex resumed>)        = 0
[pid  3649] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3649] <... ioctl resumed>)        = 0
[pid  3649] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3648] <... futex resumed>)        = 0
[pid  3649] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3648] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3649] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3649] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3648] <... futex resumed>)        = 0
[pid  3649] <... openat resumed>)       = 8
[pid  3648] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3649] write(8, "16", 2)           = 2
[pid  3649] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3648] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   50.740746][ T3649] debugfs: out of free dentries, can not create file 'timeout'
[pid  3648] exit_group(0 <unfinished ...>
[pid  3649] <... ioctl resumed>)        = ?
[pid  3648] <... exit_group resumed>)   = ?
[   50.919720][ T3649] block nbd0: shutting down sockets
[pid  3649] +++ exited with 0 +++
[pid  3648] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3648, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3650 attached
, child_tidptr=0x5555574d55d0) = 3650
[pid  3650] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3650] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3650] setpgid(0, 0)               = 0
[pid  3650] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3650] write(3, "1000", 4)         = 4
[pid  3650] close(3)                    = 0
[pid  3650] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3650] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3650] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3650] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3651 attached
, parent_tid=[3651], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3651
[pid  3650] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3650] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3651] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3651] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3650] <... futex resumed>)        = 0
[pid  3651] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3651] <... ioctl resumed>)        = 0
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... futex resumed>)        = 0
[pid  3650] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3651] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3651] <... openat resumed>)       = 4
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... futex resumed>)        = 0
[pid  3650] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3651] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3651] <... socketpair resumed>[5, 6]) = 0
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... futex resumed>)        = 0
[pid  3650] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3651] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3651] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3650] <... futex resumed>)        = 0
[pid  3651] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... ioctl resumed>)        = 0
[pid  3651] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3651] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3650] <... futex resumed>)        = 0
[pid  3651] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... openat resumed>)       = 7
[pid  3651] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3651] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3650] <... futex resumed>)        = 0
[pid  3651] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... ioctl resumed>)        = 0
[pid  3651] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3651] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3650] <... futex resumed>)        = 0
[pid  3651] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3650] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... openat resumed>)       = 8
[pid  3651] write(8, "16", 2)           = 2
[pid  3651] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3650] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   51.080299][ T3651] debugfs: out of free dentries, can not create file 'timeout'
[pid  3650] exit_group(0)               = ?
[pid  3651] <... ioctl resumed>)        = ?
[   51.262089][ T3651] block nbd0: shutting down sockets
[pid  3651] +++ exited with 0 +++
[pid  3650] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3650, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3652 attached
, child_tidptr=0x5555574d55d0) = 3652
[pid  3652] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3652] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3652] setpgid(0, 0)               = 0
[pid  3652] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3652] write(3, "1000", 4)         = 4
[pid  3652] close(3)                    = 0
[pid  3652] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3652] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3652] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3652] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3653 attached
, parent_tid=[3653], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3653
[pid  3653] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3652] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] <... set_robust_list resumed>) = 0
[pid  3653] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3653] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3652] <... futex resumed>)        = 0
[pid  3653] <... futex resumed>)        = 1
[pid  3652] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3652] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3653] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3653] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3653] <... openat resumed>)       = 4
[pid  3652] <... futex resumed>)        = 0
[pid  3653] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] <... futex resumed>)        = 0
[pid  3652] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3653] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3653] <... socketpair resumed>[5, 6]) = 0
[pid  3652] <... futex resumed>)        = 0
[pid  3653] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] <... futex resumed>)        = 0
[pid  3652] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3653] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3653] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3652] <... futex resumed>)        = 0
[pid  3653] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] <... ioctl resumed>)        = 0
[pid  3653] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3653] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3652] <... futex resumed>)        = 0
[pid  3652] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3653] <... futex resumed>)        = 0
[pid  3652] <... futex resumed>)        = 1
[pid  3653] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] <... openat resumed>)       = 7
[pid  3653] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3653] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3653] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3652] <... futex resumed>)        = 0
[pid  3653] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] <... ioctl resumed>)        = 0
[pid  3653] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3653] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3653] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3652] <... futex resumed>)        = 0
[pid  3653] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3652] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] <... openat resumed>)       = 8
[pid  3653] write(8, "16", 2)           = 2
[pid  3653] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3652] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   51.409125][ T3653] debugfs: out of free dentries, can not create file 'timeout'
[pid  3652] exit_group(0)               = ?
[pid  3653] <... ioctl resumed>)        = ?
[   51.591385][ T3653] block nbd0: shutting down sockets
[pid  3653] +++ exited with 0 +++
[pid  3652] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3652, si_uid=0, si_status=0, si_utime=2, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3654 attached
, child_tidptr=0x5555574d55d0) = 3654
[pid  3654] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3654] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3654] setpgid(0, 0)               = 0
[pid  3654] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3654] write(3, "1000", 4)         = 4
[pid  3654] close(3)                    = 0
[pid  3654] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3654] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3654] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3654] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3655 attached
, parent_tid=[3655], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3655
[pid  3654] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3654] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3655] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3655] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3654] <... futex resumed>)        = 0
[pid  3654] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3654] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3655] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3654] <... futex resumed>)        = 0
[pid  3655] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3655] <... openat resumed>)       = 4
[pid  3654] <... futex resumed>)        = 0
[pid  3655] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... futex resumed>)        = 0
[pid  3654] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3655] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3655] <... socketpair resumed>[5, 6]) = 0
[pid  3654] <... futex resumed>)        = 0
[pid  3655] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... futex resumed>)        = 0
[pid  3654] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3655] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3654] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... ioctl resumed>)        = 0
[pid  3655] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3654] <... futex resumed>)        = 0
[pid  3655] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3655] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3654] <... futex resumed>)        = 0
[pid  3655] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... openat resumed>)       = 7
[pid  3655] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3654] <... futex resumed>)        = 0
[pid  3655] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3655] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3654] <... futex resumed>)        = 0
[pid  3655] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... ioctl resumed>)        = 0
[pid  3655] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3654] <... futex resumed>)        = 0
[pid  3655] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3655] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3654] <... futex resumed>)        = 0
[pid  3655] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3654] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... openat resumed>)       = 8
[pid  3655] write(8, "16", 2)           = 2
[pid  3655] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3654] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3654] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out)
[   51.758867][ T3655] debugfs: out of free dentries, can not create file 'timeout'
[pid  3654] exit_group(0)               = ?
[pid  3655] <... ioctl resumed>)        = ?
[   51.937908][ T3655] block nbd0: shutting down sockets
[pid  3655] +++ exited with 0 +++
[pid  3654] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3654, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555574d55d0) = 3656
./strace-static-x86_64: Process 3656 attached
[pid  3656] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3656] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3656] setpgid(0, 0)               = 0
[pid  3656] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3656] write(3, "1000", 4)         = 4
[pid  3656] close(3)                    = 0
[pid  3656] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3656] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3656] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3656] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3657], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3657
[pid  3656] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3656] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3657 attached
 <unfinished ...>
[pid  3657] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3657] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3657] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3656] <... futex resumed>)        = 0
[pid  3656] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3656] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... futex resumed>)        = 1
[pid  3657] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3657] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3656] <... futex resumed>)        = 0
[pid  3656] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3656] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... futex resumed>)        = 1
[pid  3657] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3657] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3656] <... futex resumed>)        = 0
[pid  3656] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3656] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... futex resumed>)        = 1
[pid  3657] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3657] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3656] <... futex resumed>)        = 0
[pid  3656] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3656] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... futex resumed>)        = 1
[pid  3657] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3657] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3656] <... futex resumed>)        = 0
[pid  3657] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3656] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3657] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3656] <... futex resumed>)        = 0
[pid  3657] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3656] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... openat resumed>)       = 7
[pid  3657] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3656] <... futex resumed>)        = 0
[pid  3657] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3656] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3657] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3656] <... futex resumed>)        = 0
[pid  3657] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3656] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... ioctl resumed>)        = 0
[pid  3657] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3656] <... futex resumed>)        = 0
[pid  3657] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3656] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3657] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3656] <... futex resumed>)        = 0
[pid  3657] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3656] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... openat resumed>)       = 8
[pid  3657] write(8, "16", 2)           = 2
[pid  3657] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3656] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   52.098635][ T3657] debugfs: out of free dentries, can not create file 'timeout'
[pid  3656] exit_group(0 <unfinished ...>
[pid  3657] <... ioctl resumed>)        = ?
[pid  3656] <... exit_group resumed>)   = ?
[pid  3657] +++ exited with 0 +++
[pid  3656] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3656, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555574d55d0) = 3658
./strace-static-x86_64: Process 3658 attached
[pid  3658] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3658] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3658] setpgid(0, 0)               = 0
[pid  3658] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3658] write(3, "1000", 4)         = 4
[pid  3658] close(3)                    = 0
[pid  3658] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3658] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3658] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3659 attached
, parent_tid=[3659], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3659
[pid  3658] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3658] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3659] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3659] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3659] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3658] <... futex resumed>)        = 0
[pid  3659] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... ioctl resumed>)        = 0
[pid  3658] <... futex resumed>)        = 0
[pid  3659] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3659] <... futex resumed>)        = 0
[pid  3658] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3659] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... openat resumed>)       = 4
[pid  3658] <... futex resumed>)        = 0
[pid  3659] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3659] <... futex resumed>)        = 0
[pid  3658] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3659] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... socketpair resumed>[5, 6]) = 0
[pid  3658] <... futex resumed>)        = 0
[pid  3659] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3659] <... futex resumed>)        = 0
[pid  3658] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3659] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[   52.279033][ T3657] block nbd0: shutting down sockets
[pid  3658] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3659] <... ioctl resumed>)        = 0
[pid  3659] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3658] <... futex resumed>)        = 0
[pid  3659] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3658] <... futex resumed>)        = 0
[pid  3659] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3659] <... openat resumed>)       = 7
[pid  3659] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3658] <... futex resumed>)        = 0
[pid  3659] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3658] <... futex resumed>)        = 0
[pid  3659] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3659] <... ioctl resumed>)        = 0
[pid  3659] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3658] <... futex resumed>)        = 0
[pid  3659] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3658] <... futex resumed>)        = 0
[pid  3659] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3658] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3659] <... openat resumed>)       = 8
[pid  3659] write(8, "16", 2)           = 2
[pid  3659] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3658] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3658] exit_group(0 <unfinished ...>
[pid  3659] <... ioctl resumed>)        = ?
[pid  3658] <... exit_group resumed>)   = ?
[   52.552072][ T3659] block nbd0: shutting down sockets
[pid  3659] +++ exited with 0 +++
[pid  3658] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3658, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3660 attached
, child_tidptr=0x5555574d55d0) = 3660
[pid  3660] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3660] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3660] setpgid(0, 0)               = 0
[pid  3660] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3660] write(3, "1000", 4)         = 4
[pid  3660] close(3)                    = 0
[pid  3660] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3660] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3660] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3660] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3661], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3661
[pid  3660] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3660] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3661 attached
 <unfinished ...>
[pid  3661] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3661] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3661] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3660] <... futex resumed>)        = 0
[pid  3660] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3660] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3661] <... futex resumed>)        = 1
[pid  3661] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3661] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3660] <... futex resumed>)        = 0
[pid  3660] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3660] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3661] <... futex resumed>)        = 1
[pid  3661] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3661] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3660] <... futex resumed>)        = 0
[pid  3661] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3660] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3661] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3660] <... futex resumed>)        = 0
[pid  3660] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3661] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3661] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3660] <... futex resumed>)        = 0
[pid  3661] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3660] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3660] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3661] <... ioctl resumed>)        = 0
[pid  3661] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3660] <... futex resumed>)        = 0
[pid  3661] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3660] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3661] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3661] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3660] <... futex resumed>)        = 0
[pid  3661] <... openat resumed>)       = 7
[pid  3660] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3661] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3660] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3661] <... futex resumed>)        = 0
[pid  3660] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3661] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3660] <... futex resumed>)        = 0
[pid  3660] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3661] <... ioctl resumed>)        = 0
[pid  3661] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3660] <... futex resumed>)        = 0
[pid  3661] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3660] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3661] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 8
[pid  3660] <... futex resumed>)        = 0
[pid  3661] write(8, "16", 2 <unfinished ...>
[pid  3660] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3661] <... write resumed>)        = 2
[pid  3661] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3660] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   52.699315][ T3661] debugfs: out of free dentries, can not create file 'timeout'
[pid  3660] exit_group(0)               = ?
[pid  3661] <... ioctl resumed>)        = ?
[pid  3661] +++ exited with 0 +++
[pid  3660] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3660, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3662 attached
, child_tidptr=0x5555574d55d0) = 3662
[   52.877933][ T3661] block nbd0: shutting down sockets
[pid  3662] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3662] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3662] setpgid(0, 0)               = 0
[pid  3662] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3662] write(3, "1000", 4)         = 4
[pid  3662] close(3)                    = 0
[pid  3662] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3662] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3662] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3662] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3663], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3663
./strace-static-x86_64: Process 3663 attached
[pid  3663] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3663] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3662] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3662] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3663] <... futex resumed>)        = 0
[pid  3663] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3663] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3662] <... futex resumed>)        = 0
[pid  3662] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3662] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3663] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3663] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3662] <... futex resumed>)        = 0
[pid  3662] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3662] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3663] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3663] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3662] <... futex resumed>)        = 0
[pid  3662] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3662] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3663] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3663] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3662] <... futex resumed>)        = 0
[pid  3662] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3662] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3663] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3663] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3662] <... futex resumed>)        = 0
[pid  3663] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3662] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3663] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3662] <... futex resumed>)        = 0
[pid  3663] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3662] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3663] <... openat resumed>)       = 7
[pid  3663] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3662] <... futex resumed>)        = 0
[pid  3663] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3662] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3663] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3662] <... futex resumed>)        = 0
[pid  3663] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3662] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3663] <... ioctl resumed>)        = 0
[pid  3663] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3662] <... futex resumed>)        = 0
[pid  3663] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3662] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3663] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3662] <... futex resumed>)        = 0
[pid  3663] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3662] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3663] <... openat resumed>)       = 8
[pid  3663] write(8, "16", 2)           = 2
[pid  3663] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3662] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   53.030093][ T3663] debugfs: out of free dentries, can not create file 'timeout'
[pid  3662] exit_group(0 <unfinished ...>
[pid  3663] <... ioctl resumed>)        = ?
[pid  3662] <... exit_group resumed>)   = ?
[pid  3663] +++ exited with 0 +++
[pid  3662] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3662, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3664 attached
, child_tidptr=0x5555574d55d0) = 3664
[pid  3664] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3664] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3664] setpgid(0, 0)               = 0
[pid  3664] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3664] write(3, "1000", 4)         = 4
[pid  3664] close(3)                    = 0
[pid  3664] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3664] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3664] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3664] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3665 attached
, parent_tid=[3665], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3665
[pid  3665] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3665] <... set_robust_list resumed>) = 0
[pid  3664] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3665] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3665] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3664] <... futex resumed>)        = 0
[pid  3665] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3665] <... ioctl resumed>)        = 0
[pid  3664] <... futex resumed>)        = 0
[pid  3665] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3665] <... futex resumed>)        = 0
[pid  3664] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3665] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3665] <... openat resumed>)       = 4
[pid  3664] <... futex resumed>)        = 0
[pid  3665] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3665] <... futex resumed>)        = 0
[pid  3664] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3665] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3665] <... socketpair resumed>[5, 6]) = 0
[pid  3664] <... futex resumed>)        = 0
[pid  3665] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3665] <... futex resumed>)        = 0
[pid  3664] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3665] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[   53.209222][ T3663] block nbd0: shutting down sockets
[pid  3664] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3665] <... ioctl resumed>)        = 0
[pid  3665] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3664] <... futex resumed>)        = 0
[pid  3665] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3665] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3664] <... futex resumed>)        = 0
[pid  3665] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3665] <... openat resumed>)       = 7
[pid  3665] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3664] <... futex resumed>)        = 0
[pid  3665] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3665] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3664] <... futex resumed>)        = 0
[pid  3665] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3665] <... ioctl resumed>)        = 0
[pid  3665] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3665] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3664] <... futex resumed>)        = 0
[pid  3664] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3665] <... futex resumed>)        = 0
[pid  3664] <... futex resumed>)        = 1
[pid  3665] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3664] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3665] <... openat resumed>)       = 8
[pid  3665] write(8, "16", 2)           = 2
[pid  3665] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3664] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3664] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out)
[   53.329332][ T3665] debugfs: out of free dentries, can not create file 'timeout'
[pid  3664] exit_group(0)               = ?
[pid  3665] <... ioctl resumed>)        = ?
[pid  3665] +++ exited with 0 +++
[pid  3664] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3664, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   53.508024][ T3665] block nbd0: shutting down sockets
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3666 attached
, child_tidptr=0x5555574d55d0) = 3666
[pid  3666] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3666] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3666] setpgid(0, 0)               = 0
[pid  3666] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3666] write(3, "1000", 4)         = 4
[pid  3666] close(3)                    = 0
[pid  3666] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3666] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3666] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3666] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3667 attached
, parent_tid=[3667], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3667
[pid  3667] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3667] <... set_robust_list resumed>) = 0
[pid  3666] <... futex resumed>)        = 0
[pid  3666] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3667] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3667] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3666] <... futex resumed>)        = 0
[pid  3667] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3667] <... ioctl resumed>)        = 0
[pid  3666] <... futex resumed>)        = 0
[pid  3667] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3667] <... futex resumed>)        = 0
[pid  3666] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3667] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3667] <... openat resumed>)       = 4
[pid  3666] <... futex resumed>)        = 0
[pid  3667] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3667] <... futex resumed>)        = 0
[pid  3666] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3667] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3667] <... socketpair resumed>[5, 6]) = 0
[pid  3666] <... futex resumed>)        = 0
[pid  3667] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3667] <... futex resumed>)        = 0
[pid  3666] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3667] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3667] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3666] <... futex resumed>)        = 0
[pid  3667] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3667] <... ioctl resumed>)        = 0
[pid  3667] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3667] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3666] <... futex resumed>)        = 0
[pid  3666] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3667] <... futex resumed>)        = 0
[pid  3666] <... futex resumed>)        = 1
[pid  3667] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3667] <... openat resumed>)       = 7
[pid  3667] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3666] <... futex resumed>)        = 0
[pid  3667] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3667] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3666] <... futex resumed>)        = 0
[pid  3667] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3666] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3667] <... ioctl resumed>)        = 0
[pid  3667] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3666] <... futex resumed>)        = 0
[pid  3667] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3666] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3667] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3666] <... futex resumed>)        = 0
[pid  3666] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3667] <... openat resumed>)       = 8
[pid  3667] write(8, "16", 2)           = 2
[pid  3667] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3666] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3666] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out)
[   53.669854][ T3667] debugfs: out of free dentries, can not create file 'timeout'
[pid  3666] exit_group(0)               = ?
[pid  3667] <... ioctl resumed>)        = ?
[   53.849432][ T3667] block nbd0: shutting down sockets
[pid  3667] +++ exited with 0 +++
[pid  3666] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3666, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3668 attached
, child_tidptr=0x5555574d55d0) = 3668
[pid  3668] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3668] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3668] setpgid(0, 0)               = 0
[pid  3668] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3668] write(3, "1000", 4)         = 4
[pid  3668] close(3)                    = 0
[pid  3668] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3668] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3668] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3668] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3669 attached
, parent_tid=[3669], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3669
[pid  3669] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3668] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3669] <... set_robust_list resumed>) = 0
[pid  3668] <... futex resumed>)        = 0
[pid  3668] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3669] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3669] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3668] <... futex resumed>)        = 0
[pid  3669] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3668] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3669] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3668] <... futex resumed>)        = 0
[pid  3669] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3668] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3669] <... ioctl resumed>)        = 0
[pid  3669] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3668] <... futex resumed>)        = 0
[pid  3669] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3668] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3669] <... openat resumed>)       = 4
[pid  3668] <... futex resumed>)        = 0
[pid  3669] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3668] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3668] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3669] <... futex resumed>)        = 0
[pid  3668] <... futex resumed>)        = 0
[pid  3669] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3668] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3669] <... socketpair resumed>[5, 6]) = 0
[pid  3669] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3669] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3668] <... futex resumed>)        = 0
[pid  3669] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3668] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3669] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3668] <... futex resumed>)        = 0
[pid  3668] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3669] <... ioctl resumed>)        = 0
[pid  3669] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3669] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3668] <... futex resumed>)        = 0
[pid  3668] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3669] <... futex resumed>)        = 0
[pid  3668] <... futex resumed>)        = 1
[pid  3669] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3668] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3669] <... openat resumed>)       = 7
[pid  3669] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3668] <... futex resumed>)        = 0
[pid  3669] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3668] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3669] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3668] <... futex resumed>)        = 0
[pid  3669] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3668] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3669] <... ioctl resumed>)        = 0
[pid  3669] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3668] <... futex resumed>)        = 0
[pid  3669] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3668] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3669] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3668] <... futex resumed>)        = 0
[pid  3668] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3669] <... openat resumed>)       = 8
[pid  3669] write(8, "16", 2)           = 2
[pid  3669] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3668] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   54.010025][ T3669] debugfs: out of free dentries, can not create file 'timeout'
[pid  3668] exit_group(0)               = ?
[pid  3669] <... ioctl resumed>)        = ?
[   54.190545][ T3669] block nbd0: shutting down sockets
[pid  3669] +++ exited with 0 +++
[pid  3668] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3668, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3670 attached
, child_tidptr=0x5555574d55d0) = 3670
[pid  3670] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3670] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3670] setpgid(0, 0)               = 0
[pid  3670] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3670] write(3, "1000", 4)         = 4
[pid  3670] close(3)                    = 0
[pid  3670] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3670] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3670] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3670] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3671], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3671
[pid  3670] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3670] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3671 attached
 <unfinished ...>
[pid  3671] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3671] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3671] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] <... futex resumed>)        = 0
[pid  3670] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3670] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3671] <... futex resumed>)        = 1
[pid  3671] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3671] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] <... futex resumed>)        = 0
[pid  3670] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3670] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3671] <... futex resumed>)        = 1
[pid  3671] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3671] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] <... futex resumed>)        = 0
[pid  3670] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3670] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3671] <... futex resumed>)        = 1
[pid  3671] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3671] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] <... futex resumed>)        = 0
[pid  3670] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3670] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3671] <... futex resumed>)        = 1
[pid  3671] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3671] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3670] <... futex resumed>)        = 0
[pid  3671] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3670] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3671] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3670] <... futex resumed>)        = 0
[pid  3671] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3670] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3671] <... openat resumed>)       = 7
[pid  3671] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3670] <... futex resumed>)        = 0
[pid  3671] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3670] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3671] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3670] <... futex resumed>)        = 0
[pid  3671] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3670] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3671] <... ioctl resumed>)        = 0
[pid  3671] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3670] <... futex resumed>)        = 0
[pid  3671] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3670] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3671] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3670] <... futex resumed>)        = 0
[pid  3671] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3670] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3671] <... openat resumed>)       = 8
[pid  3671] write(8, "16", 2)           = 2
[pid  3671] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3670] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3670] exit_group(0 <unfinished ...>
[pid  3671] <... ioctl resumed>)        = ?
[pid  3670] <... exit_group resumed>)   = ?
[pid  3671] +++ exited with 0 +++
[pid  3670] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3670, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
[   54.516493][ T3671] block nbd0: shutting down sockets
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3672 attached
, child_tidptr=0x5555574d55d0) = 3672
[pid  3672] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3672] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3672] setpgid(0, 0)               = 0
[pid  3672] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3672] write(3, "1000", 4)         = 4
[pid  3672] close(3)                    = 0
[pid  3672] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3672] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3672] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3672] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3673 attached
, parent_tid=[3673], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3673
[pid  3672] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3672] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3673] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3673] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3673] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3672] <... futex resumed>)        = 0
[pid  3673] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3673] <... ioctl resumed>)        = 0
[pid  3672] <... futex resumed>)        = 0
[pid  3673] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3673] <... futex resumed>)        = 0
[pid  3672] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3673] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3673] <... openat resumed>)       = 4
[pid  3672] <... futex resumed>)        = 0
[pid  3673] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3673] <... futex resumed>)        = 0
[pid  3672] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3673] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3673] <... socketpair resumed>[5, 6]) = 0
[pid  3672] <... futex resumed>)        = 0
[pid  3673] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3673] <... futex resumed>)        = 0
[pid  3672] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3673] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3672] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3673] <... ioctl resumed>)        = 0
[pid  3673] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3672] <... futex resumed>)        = 0
[pid  3673] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3673] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3672] <... futex resumed>)        = 0
[pid  3673] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3673] <... openat resumed>)       = 7
[pid  3673] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3672] <... futex resumed>)        = 0
[pid  3673] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3673] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3672] <... futex resumed>)        = 0
[pid  3673] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3673] <... ioctl resumed>)        = 0
[pid  3673] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3673] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3672] <... futex resumed>)        = 0
[pid  3672] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3673] <... futex resumed>)        = 0
[pid  3672] <... futex resumed>)        = 1
[pid  3673] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3672] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3673] <... openat resumed>)       = 8
[pid  3673] write(8, "16", 2)           = 2
[pid  3673] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3672] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3672] exit_group(0)               = ?
[pid  3673] <... ioctl resumed>)        = ?
[pid  3673] +++ exited with 0 +++
[pid  3672] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3672, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   54.848204][ T3673] block nbd0: shutting down sockets
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3674 attached
, child_tidptr=0x5555574d55d0) = 3674
[pid  3674] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3674] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3674] setpgid(0, 0)               = 0
[pid  3674] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3674] write(3, "1000", 4)         = 4
[pid  3674] close(3)                    = 0
[pid  3674] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3674] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3674] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3674] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3675], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3675
[pid  3674] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3674] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3675 attached
 <unfinished ...>
[pid  3675] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3675] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3675] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3674] <... futex resumed>)        = 0
[pid  3674] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3674] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3675] <... futex resumed>)        = 1
[pid  3675] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3675] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3674] <... futex resumed>)        = 0
[pid  3674] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3674] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3675] <... futex resumed>)        = 1
[pid  3675] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3675] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3674] <... futex resumed>)        = 0
[pid  3674] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3674] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3675] <... futex resumed>)        = 1
[pid  3675] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3675] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3674] <... futex resumed>)        = 0
[pid  3674] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3674] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3675] <... futex resumed>)        = 1
[pid  3675] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3675] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3674] <... futex resumed>)        = 0
[pid  3675] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3674] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3675] <... openat resumed>)       = 7
[pid  3674] <... futex resumed>)        = 0
[pid  3675] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3674] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3675] <... futex resumed>)        = 0
[pid  3674] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3675] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3674] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3674] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3675] <... ioctl resumed>)        = 0
[pid  3675] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3674] <... futex resumed>)        = 0
[pid  3675] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3674] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3675] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3674] <... futex resumed>)        = 0
[pid  3675] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3674] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3675] <... openat resumed>)       = 8
[pid  3675] write(8, "16", 2)           = 2
[pid  3675] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3674] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   54.988500][ T3675] debugfs: out of free dentries, can not create file 'timeout'
[pid  3674] exit_group(0)               = ?
[pid  3675] <... ioctl resumed>)        = ?
[pid  3675] +++ exited with 0 +++
[pid  3674] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3674, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3676 attached
, child_tidptr=0x5555574d55d0) = 3676
[   55.167845][ T3675] block nbd0: shutting down sockets
[pid  3676] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3676] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3676] setpgid(0, 0)               = 0
[pid  3676] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3676] write(3, "1000", 4)         = 4
[pid  3676] close(3)                    = 0
[pid  3676] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3676] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3676] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3676] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3677], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3677
./strace-static-x86_64: Process 3677 attached
[pid  3676] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3676] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3677] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3677] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3676] <... futex resumed>)        = 0
[pid  3677] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3676] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... ioctl resumed>)        = 0
[pid  3676] <... futex resumed>)        = 0
[pid  3677] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3676] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... futex resumed>)        = 0
[pid  3676] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3677] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3676] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3677] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3676] <... futex resumed>)        = 0
[pid  3677] <... openat resumed>)       = 4
[pid  3676] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3676] <... futex resumed>)        = 0
[pid  3677] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3676] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... socketpair resumed>[5, 6]) = 0
[pid  3676] <... futex resumed>)        = 0
[pid  3677] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3676] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... futex resumed>)        = 0
[pid  3676] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3677] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3676] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3676] <... futex resumed>)        = 0
[pid  3677] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3676] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... ioctl resumed>)        = 0
[pid  3677] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3676] <... futex resumed>)        = 0
[pid  3677] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3676] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 7
[pid  3676] <... futex resumed>)        = 0
[pid  3677] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3676] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... futex resumed>)        = 0
[pid  3676] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3677] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3676] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3677] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3676] <... futex resumed>)        = 0
[pid  3676] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... ioctl resumed>)        = 0
[pid  3677] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3676] <... futex resumed>)        = 0
[pid  3676] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3676] <... futex resumed>)        = 0
[pid  3676] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... openat resumed>)       = 8
[pid  3677] write(8, "16", 2)           = 2
[pid  3677] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3676] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   55.309177][ T3677] debugfs: out of free dentries, can not create file 'timeout'
[pid  3676] exit_group(0)               = ?
[pid  3677] <... ioctl resumed>)        = ?
[pid  3677] +++ exited with 0 +++
[pid  3676] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3676, si_uid=0, si_status=0, si_utime=2, si_stime=4} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   55.488469][ T3677] block nbd0: shutting down sockets
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3678 attached
, child_tidptr=0x5555574d55d0) = 3678
[pid  3678] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3678] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3678] setpgid(0, 0)               = 0
[pid  3678] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3678] write(3, "1000", 4)         = 4
[pid  3678] close(3)                    = 0
[pid  3678] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3678] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3678] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3679], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3679
[pid  3678] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3679 attached
 <unfinished ...>
[pid  3679] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3679] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3679] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3678] <... futex resumed>)        = 0
[pid  3678] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] <... futex resumed>)        = 1
[pid  3679] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3679] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3678] <... futex resumed>)        = 0
[pid  3678] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] <... futex resumed>)        = 1
[pid  3679] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3679] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3678] <... futex resumed>)        = 0
[pid  3678] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] <... futex resumed>)        = 1
[pid  3679] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3679] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3678] <... futex resumed>)        = 0
[pid  3678] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] <... futex resumed>)        = 1
[pid  3679] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3678] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3678] futex(0x7f6c23c8c4fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3679] <... ioctl resumed>)        = 0
[pid  3678] <... futex resumed>)        = 0
[pid  3679] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3678] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid  3679] <... futex resumed>)        = 0
[pid  3678] <... mmap resumed>)         = 0x7f6c23b74000
[pid  3679] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3678] mprotect(0x7f6c23b75000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3678] clone(child_stack=0x7f6c23b943f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3680], tls=0x7f6c23b94700, child_tidptr=0x7f6c23b949d0) = 3680
[pid  3678] futex(0x7f6c23c8c4f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7f6c23c8c4fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3680 attached
 <unfinished ...>
[pid  3680] set_robust_list(0x7f6c23b949e0, 24) = 0
[pid  3680] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 7
[pid  3680] futex(0x7f6c23c8c4fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3678] <... futex resumed>)        = 0
[pid  3678] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3679] <... futex resumed>)        = 0
[pid  3678] <... futex resumed>)        = 1
[pid  3679] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3678] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3680] <... futex resumed>)        = 1
[pid  3680] futex(0x7f6c23c8c4f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3679] <... ioctl resumed>)        = 0
[pid  3679] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3678] <... futex resumed>)        = 0
[pid  3679] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3678] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3679] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3678] <... futex resumed>)        = 0
[pid  3679] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3678] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] <... openat resumed>)       = 8
[pid  3679] write(8, "16", 2)           = 2
[pid  3679] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3678] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   55.638785][ T3679] debugfs: out of free dentries, can not create file 'timeout'
[pid  3678] exit_group(0)               = ?
[pid  3680] <... futex resumed>)        = ?
[pid  3680] +++ exited with 0 +++
[pid  3679] <... ioctl resumed>)        = ?
[pid  3679] +++ exited with 0 +++
[pid  3678] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3678, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   55.817408][ T3679] block nbd0: shutting down sockets
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555574d55d0) = 3681
./strace-static-x86_64: Process 3681 attached
[pid  3681] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3681] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3681] setpgid(0, 0)               = 0
[pid  3681] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3681] write(3, "1000", 4)         = 4
[pid  3681] close(3)                    = 0
[pid  3681] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3681] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3681] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3681] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3682], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3682
[pid  3681] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 3682 attached
[pid  3681] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3682] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3682] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3682] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3681] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] <... futex resumed>)        = 0
[pid  3682] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3682] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3681] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3682] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3681] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3682] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3681] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3682] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3682] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] <... openat resumed>)       = 7
[pid  3682] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3682] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] <... ioctl resumed>)        = 0
[pid  3682] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3682] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3681] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3682] <... openat resumed>)       = 8
[pid  3681] <... futex resumed>)        = 0
[pid  3682] write(8, "16", 2 <unfinished ...>
[pid  3681] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] <... write resumed>)        = 2
[pid  3682] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3681] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   55.978863][ T3682] debugfs: out of free dentries, can not create file 'timeout'
[pid  3681] exit_group(0)               = ?
[pid  3682] <... ioctl resumed>)        = ?
[   56.155976][ T3682] block nbd0: shutting down sockets
[pid  3682] +++ exited with 0 +++
[pid  3681] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3681, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3683 attached
, child_tidptr=0x5555574d55d0) = 3683
[pid  3683] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3683] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3683] setpgid(0, 0)               = 0
[pid  3683] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3683] write(3, "1000", 4)         = 4
[pid  3683] close(3)                    = 0
[pid  3683] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3683] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3683] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3683] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3684], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3684
[pid  3683] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3683] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3684 attached
 <unfinished ...>
[pid  3684] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3684] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3684] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3683] <... futex resumed>)        = 0
[pid  3684] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3683] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3684] <... ioctl resumed>)        = 0
[pid  3683] <... futex resumed>)        = 0
[pid  3684] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3683] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... futex resumed>)        = 0
[pid  3683] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3684] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3683] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3684] <... openat resumed>)       = 4
[pid  3683] <... futex resumed>)        = 0
[pid  3684] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3683] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... futex resumed>)        = 0
[pid  3683] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3684] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3683] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3684] <... socketpair resumed>[5, 6]) = 0
[pid  3683] <... futex resumed>)        = 0
[pid  3684] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3683] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... futex resumed>)        = 0
[pid  3683] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3684] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3683] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3683] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... ioctl resumed>)        = 0
[pid  3684] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3684] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3683] <... futex resumed>)        = 0
[pid  3683] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3684] <... futex resumed>)        = 0
[pid  3683] <... futex resumed>)        = 1
[pid  3684] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3683] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... openat resumed>)       = 7
[pid  3684] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3683] <... futex resumed>)        = 0
[pid  3683] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3684] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3683] <... futex resumed>)        = 0
[pid  3683] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... ioctl resumed>)        = 0
[pid  3684] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3683] <... futex resumed>)        = 0
[pid  3684] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3683] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3684] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3683] <... futex resumed>)        = 0
[pid  3684] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3683] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... openat resumed>)       = 8
[pid  3684] write(8, "16", 2)           = 2
[pid  3684] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3683] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   56.310236][ T3684] debugfs: out of free dentries, can not create file 'timeout'
[pid  3683] exit_group(0)               = ?
[pid  3684] <... ioctl resumed>)        = ?
[pid  3684] +++ exited with 0 +++
[pid  3683] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3683, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3685 attached
, child_tidptr=0x5555574d55d0) = 3685
[   56.488052][ T3684] block nbd0: shutting down sockets
[pid  3685] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3685] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3685] setpgid(0, 0)               = 0
[pid  3685] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3685] write(3, "1000", 4)         = 4
[pid  3685] close(3)                    = 0
[pid  3685] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3685] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3685] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3685] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3686], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3686
[pid  3685] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3685] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3686 attached
 <unfinished ...>
[pid  3686] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3686] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3686] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3685] <... futex resumed>)        = 0
[pid  3685] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3685] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... futex resumed>)        = 1
[pid  3686] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3686] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3685] <... futex resumed>)        = 0
[pid  3685] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3685] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... futex resumed>)        = 1
[pid  3686] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3686] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3685] <... futex resumed>)        = 0
[pid  3685] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3685] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... futex resumed>)        = 1
[pid  3686] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3686] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3685] <... futex resumed>)        = 0
[pid  3685] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3685] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... futex resumed>)        = 1
[pid  3686] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3686] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3685] <... futex resumed>)        = 0
[pid  3686] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3685] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3686] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3685] <... futex resumed>)        = 0
[pid  3686] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3685] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... openat resumed>)       = 7
[pid  3686] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3685] <... futex resumed>)        = 0
[pid  3686] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3685] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3686] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3685] <... futex resumed>)        = 0
[pid  3686] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3685] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... ioctl resumed>)        = 0
[pid  3686] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3685] <... futex resumed>)        = 0
[pid  3686] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3685] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3686] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3685] <... futex resumed>)        = 0
[pid  3686] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3685] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... openat resumed>)       = 8
[pid  3686] write(8, "16", 2)           = 2
[pid  3686] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3685] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   56.628703][ T3686] debugfs: out of free dentries, can not create file 'timeout'
[pid  3685] exit_group(0)               = ?
[pid  3686] <... ioctl resumed>)        = ?
[   56.805307][ T3686] block nbd0: shutting down sockets
[pid  3686] +++ exited with 0 +++
[pid  3685] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3685, si_uid=0, si_status=0, si_utime=0, si_stime=4} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3687 attached
, child_tidptr=0x5555574d55d0) = 3687
[pid  3687] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3687] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3687] setpgid(0, 0)               = 0
[pid  3687] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3687] write(3, "1000", 4)         = 4
[pid  3687] close(3)                    = 0
[pid  3687] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3687] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3687] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3687] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3688 attached
 <unfinished ...>
[pid  3688] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3687] <... clone resumed>, parent_tid=[3688], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3688
[pid  3687] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3688] <... set_robust_list resumed>) = 0
[pid  3687] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3688] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3687] <... futex resumed>)        = 0
[pid  3688] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3688] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3687] <... futex resumed>)        = 0
[pid  3688] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] <... ioctl resumed>)        = 0
[pid  3688] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3687] <... futex resumed>)        = 0
[pid  3688] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3688] <... openat resumed>)       = 4
[pid  3687] <... futex resumed>)        = 0
[pid  3688] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3687] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3687] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] <... futex resumed>)        = 1
[pid  3687] <... futex resumed>)        = 0
[pid  3688] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] <... socketpair resumed>[5, 6]) = 0
[pid  3688] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3688] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3687] <... futex resumed>)        = 0
[pid  3687] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3688] <... futex resumed>)        = 0
[pid  3687] <... futex resumed>)        = 1
[pid  3688] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] <... ioctl resumed>)        = 0
[pid  3688] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3687] <... futex resumed>)        = 0
[pid  3688] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3688] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3687] <... futex resumed>)        = 0
[pid  3688] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] <... openat resumed>)       = 7
[pid  3688] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3687] <... futex resumed>)        = 0
[pid  3688] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3688] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3687] <... futex resumed>)        = 0
[pid  3688] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] <... ioctl resumed>)        = 0
[pid  3688] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3687] <... futex resumed>)        = 0
[pid  3688] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3688] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3687] <... futex resumed>)        = 0
[pid  3688] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3687] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] <... openat resumed>)       = 8
[pid  3688] write(8, "16", 2)           = 2
[pid  3688] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3687] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   56.939466][ T3688] debugfs: out of free dentries, can not create file 'timeout'
[pid  3687] exit_group(0)               = ?
[pid  3688] <... ioctl resumed>)        = ?
[   57.119414][ T3688] block nbd0: shutting down sockets
[pid  3688] +++ exited with 0 +++
[pid  3687] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3687, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3689 attached
, child_tidptr=0x5555574d55d0) = 3689
[pid  3689] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3689] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3689] setpgid(0, 0)               = 0
[pid  3689] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3689] write(3, "1000", 4)         = 4
[pid  3689] close(3)                    = 0
[pid  3689] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3689] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3689] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3690], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3690
[pid  3689] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3690 attached
 <unfinished ...>
[pid  3690] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3690] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3690] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3689] <... futex resumed>)        = 0
[pid  3689] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3690] <... futex resumed>)        = 1
[pid  3690] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3690] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3689] <... futex resumed>)        = 0
[pid  3689] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3690] <... futex resumed>)        = 1
[pid  3690] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3690] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3689] <... futex resumed>)        = 0
[pid  3689] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3690] <... futex resumed>)        = 1
[pid  3690] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3690] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3689] <... futex resumed>)        = 0
[pid  3689] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3690] <... futex resumed>)        = 1
[pid  3690] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3690] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3689] <... futex resumed>)        = 0
[pid  3690] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3689] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3690] <... openat resumed>)       = 7
[pid  3689] <... futex resumed>)        = 0
[pid  3690] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3689] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3690] <... futex resumed>)        = 0
[pid  3689] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3690] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3689] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3690] <... ioctl resumed>)        = 0
[pid  3690] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3689] <... futex resumed>)        = 0
[pid  3690] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3689] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3690] <... openat resumed>)       = 8
[pid  3689] <... futex resumed>)        = 0
[pid  3690] write(8, "16", 2 <unfinished ...>
[pid  3689] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3690] <... write resumed>)        = 2
[pid  3690] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3689] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   57.258291][ T3690] debugfs: out of free dentries, can not create file 'timeout'
[pid  3689] exit_group(0)               = ?
[pid  3690] <... ioctl resumed>)        = ?
[   57.440224][ T3690] block nbd0: shutting down sockets
[pid  3690] +++ exited with 0 +++
[pid  3689] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3689, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555574d55d0) = 3691
./strace-static-x86_64: Process 3691 attached
[pid  3691] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3691] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3691] setpgid(0, 0)               = 0
[pid  3691] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3691] write(3, "1000", 4)         = 4
[pid  3691] close(3)                    = 0
[pid  3691] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3691] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3691] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3692], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3692
[pid  3691] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3692 attached
 <unfinished ...>
[pid  3692] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3692] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3692] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3691] <... futex resumed>)        = 0
[pid  3691] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... futex resumed>)        = 1
[pid  3692] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3692] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3691] <... futex resumed>)        = 0
[pid  3691] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... futex resumed>)        = 1
[pid  3692] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3692] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3691] <... futex resumed>)        = 0
[pid  3691] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... futex resumed>)        = 1
[pid  3692] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3692] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3691] <... futex resumed>)        = 0
[pid  3691] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... futex resumed>)        = 1
[pid  3692] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3692] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3691] <... futex resumed>)        = 0
[pid  3692] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3691] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3692] <... openat resumed>)       = 7
[pid  3691] <... futex resumed>)        = 0
[pid  3692] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3691] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... futex resumed>)        = 0
[pid  3691] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3692] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3691] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3692] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3691] <... futex resumed>)        = 0
[pid  3692] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3691] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... ioctl resumed>)        = 0
[pid  3692] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3691] <... futex resumed>)        = 0
[pid  3692] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3691] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3692] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3692] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3691] <... futex resumed>)        = 0
[pid  3692] <... openat resumed>)       = 8
[pid  3691] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] write(8, "16", 2)           = 2
[pid  3692] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3691] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   57.581124][ T3692] debugfs: out of free dentries, can not create file 'timeout'
[pid  3691] exit_group(0)               = ?
[pid  3692] <... ioctl resumed>)        = ?
[   57.763154][ T3692] block nbd0: shutting down sockets
[pid  3692] +++ exited with 0 +++
[pid  3691] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3691, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3693 attached
, child_tidptr=0x5555574d55d0) = 3693
[pid  3693] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3693] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3693] setpgid(0, 0)               = 0
[pid  3693] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3693] write(3, "1000", 4)         = 4
[pid  3693] close(3)                    = 0
[pid  3693] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3693] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3693] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3693] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3694 attached
, parent_tid=[3694], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3694
[pid  3693] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3694] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... set_robust_list resumed>) = 0
[pid  3694] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3694] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3693] <... futex resumed>)        = 0
[pid  3694] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3694] <... ioctl resumed>)        = 0
[pid  3693] <... futex resumed>)        = 0
[pid  3694] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... futex resumed>)        = 0
[pid  3693] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3694] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3694] <... openat resumed>)       = 4
[pid  3693] <... futex resumed>)        = 0
[pid  3694] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... futex resumed>)        = 0
[pid  3693] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3694] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3694] <... socketpair resumed>[5, 6]) = 0
[pid  3693] <... futex resumed>)        = 0
[pid  3694] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... futex resumed>)        = 0
[pid  3693] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3694] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3693] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... ioctl resumed>)        = 0
[pid  3694] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3693] <... futex resumed>)        = 0
[pid  3694] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3694] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3693] <... futex resumed>)        = 0
[pid  3694] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... openat resumed>)       = 7
[pid  3694] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3693] <... futex resumed>)        = 0
[pid  3694] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3694] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3693] <... futex resumed>)        = 0
[pid  3694] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... ioctl resumed>)        = 0
[pid  3694] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3693] <... futex resumed>)        = 0
[pid  3694] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3694] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3693] <... futex resumed>)        = 0
[pid  3694] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3693] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... openat resumed>)       = 8
[pid  3694] write(8, "16", 2)           = 2
[pid  3694] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3693] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   57.919900][ T3694] debugfs: out of free dentries, can not create file 'timeout'
[pid  3693] exit_group(0 <unfinished ...>
[pid  3694] <... ioctl resumed>)        = ?
[pid  3693] <... exit_group resumed>)   = ?
[   58.098943][ T3694] block nbd0: shutting down sockets
[pid  3694] +++ exited with 0 +++
[pid  3693] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3693, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555574d55d0) = 3695
./strace-static-x86_64: Process 3695 attached
[pid  3695] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3695] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3695] setpgid(0, 0)               = 0
[pid  3695] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3695] write(3, "1000", 4)         = 4
[pid  3695] close(3)                    = 0
[pid  3695] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3695] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3695] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3696], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3696
./strace-static-x86_64: Process 3696 attached
[pid  3696] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3696] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3695] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] <... futex resumed>)        = 0
[pid  3696] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3696] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] <... futex resumed>)        = 0
[pid  3695] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3696] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] <... futex resumed>)        = 0
[pid  3695] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3696] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] <... futex resumed>)        = 0
[pid  3695] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3696] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] <... futex resumed>)        = 0
[pid  3695] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3696] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] <... futex resumed>)        = 0
[pid  3696] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3695] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3696] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3695] <... futex resumed>)        = 0
[pid  3696] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3695] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] <... openat resumed>)       = 7
[pid  3696] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] <... futex resumed>)        = 0
[pid  3696] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3695] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3696] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3695] <... futex resumed>)        = 0
[pid  3696] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3695] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] <... ioctl resumed>)        = 0
[pid  3696] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] <... futex resumed>)        = 0
[pid  3696] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3695] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3696] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3695] <... futex resumed>)        = 0
[pid  3696] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3695] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] <... openat resumed>)       = 8
[pid  3696] write(8, "16", 2)           = 2
[pid  3696] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3695] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   58.269536][ T3696] debugfs: out of free dentries, can not create file 'timeout'
[pid  3695] exit_group(0)               = ?
[pid  3696] <... ioctl resumed>)        = ?
[   58.442996][ T3696] block nbd0: shutting down sockets
[pid  3696] +++ exited with 0 +++
[pid  3695] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3695, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3697 attached
, child_tidptr=0x5555574d55d0) = 3697
[pid  3697] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3697] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3697] setpgid(0, 0)               = 0
[pid  3697] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3697] write(3, "1000", 4)         = 4
[pid  3697] close(3)                    = 0
[pid  3697] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3697] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3697] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3697] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3698], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3698
./strace-static-x86_64: Process 3698 attached
[pid  3698] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3698] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3697] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3698] <... futex resumed>)        = 0
[pid  3698] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3697] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3698] <... openat resumed>)       = 3
[pid  3698] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3697] <... futex resumed>)        = 0
[pid  3697] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3697] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3698] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3698] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3697] <... futex resumed>)        = 0
[pid  3697] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3697] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3698] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3698] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3697] <... futex resumed>)        = 0
[pid  3697] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3697] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3698] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3698] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3697] <... futex resumed>)        = 0
[pid  3697] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3697] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3698] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3698] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3697] <... futex resumed>)        = 0
[pid  3698] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3697] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3698] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3697] <... futex resumed>)        = 0
[pid  3698] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3697] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3698] <... openat resumed>)       = 7
[pid  3698] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3697] <... futex resumed>)        = 0
[pid  3698] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3697] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3698] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3697] <... futex resumed>)        = 0
[pid  3698] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3697] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3698] <... ioctl resumed>)        = 0
[pid  3698] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3697] <... futex resumed>)        = 0
[pid  3698] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3697] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3698] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3697] <... futex resumed>)        = 0
[pid  3698] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3697] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3698] <... openat resumed>)       = 8
[pid  3698] write(8, "16", 2)           = 2
[pid  3698] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3697] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   58.609558][ T3698] debugfs: out of free dentries, can not create file 'timeout'
[pid  3697] exit_group(0 <unfinished ...>
[pid  3698] <... ioctl resumed>)        = ?
[pid  3697] <... exit_group resumed>)   = ?
[   58.789419][ T3698] block nbd0: shutting down sockets
[pid  3698] +++ exited with 0 +++
[pid  3697] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3697, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3699 attached
, child_tidptr=0x5555574d55d0) = 3699
[pid  3699] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3699] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3699] setpgid(0, 0)               = 0
[pid  3699] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3699] write(3, "1000", 4)         = 4
[pid  3699] close(3)                    = 0
[pid  3699] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3699] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3699] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3699] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3700], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3700
[pid  3699] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3699] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3700 attached
 <unfinished ...>
[pid  3700] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3700] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3700] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3699] <... futex resumed>)        = 0
[pid  3699] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3699] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3700] <... futex resumed>)        = 1
[pid  3700] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3700] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3699] <... futex resumed>)        = 0
[pid  3699] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3699] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3700] <... futex resumed>)        = 1
[pid  3700] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3700] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3699] <... futex resumed>)        = 0
[pid  3699] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3699] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3700] <... futex resumed>)        = 1
[pid  3700] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3700] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3699] <... futex resumed>)        = 0
[pid  3699] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3699] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3700] <... futex resumed>)        = 1
[pid  3700] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3700] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3699] <... futex resumed>)        = 0
[pid  3700] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3699] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3700] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3699] <... futex resumed>)        = 0
[pid  3700] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3699] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3700] <... openat resumed>)       = 7
[pid  3700] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3699] <... futex resumed>)        = 0
[pid  3700] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3699] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3700] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3699] <... futex resumed>)        = 0
[pid  3700] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3699] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3700] <... ioctl resumed>)        = 0
[pid  3700] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3699] <... futex resumed>)        = 0
[pid  3700] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3699] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3700] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3699] <... futex resumed>)        = 0
[pid  3700] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 8
[pid  3699] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3700] write(8, "16", 2)           = 2
[pid  3700] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3699] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   58.949386][ T3700] debugfs: out of free dentries, can not create file 'timeout'
[pid  3699] exit_group(0)               = ?
[pid  3700] <... ioctl resumed>)        = ?
[   59.130255][ T3700] block nbd0: shutting down sockets
[pid  3700] +++ exited with 0 +++
[pid  3699] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3699, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3701 attached
, child_tidptr=0x5555574d55d0) = 3701
[pid  3701] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3701] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3701] setpgid(0, 0)               = 0
[pid  3701] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3701] write(3, "1000", 4)         = 4
[pid  3701] close(3)                    = 0
[pid  3701] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3701] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3701] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3701] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3702], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3702
[pid  3701] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3701] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3702 attached
 <unfinished ...>
[pid  3702] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3702] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3702] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3701] <... futex resumed>)        = 0
[pid  3701] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3701] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3702] <... futex resumed>)        = 1
[pid  3702] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3702] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3701] <... futex resumed>)        = 0
[pid  3701] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3701] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3702] <... futex resumed>)        = 1
[pid  3702] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3702] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3701] <... futex resumed>)        = 0
[pid  3701] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3701] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3702] <... futex resumed>)        = 1
[pid  3702] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3702] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3701] <... futex resumed>)        = 0
[pid  3701] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3701] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3702] <... futex resumed>)        = 1
[pid  3702] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3702] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3701] <... futex resumed>)        = 0
[pid  3702] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3701] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3702] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3701] <... futex resumed>)        = 0
[pid  3701] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3702] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 7
[pid  3702] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3701] <... futex resumed>)        = 0
[pid  3702] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3701] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3702] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3701] <... futex resumed>)        = 0
[pid  3702] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3701] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3702] <... ioctl resumed>)        = 0
[pid  3702] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3701] <... futex resumed>)        = 0
[pid  3702] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3701] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3702] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3701] <... futex resumed>)        = 0
[pid  3702] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3701] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3702] <... openat resumed>)       = 8
[pid  3702] write(8, "16", 2)           = 2
[pid  3702] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3701] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   59.279410][ T3702] debugfs: out of free dentries, can not create file 'timeout'
[pid  3701] exit_group(0 <unfinished ...>
[pid  3702] <... ioctl resumed>)        = ?
[pid  3701] <... exit_group resumed>)   = ?
[   59.458811][ T3702] block nbd0: shutting down sockets
[pid  3702] +++ exited with 0 +++
[pid  3701] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3701, si_uid=0, si_status=0, si_utime=2, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3703 attached
, child_tidptr=0x5555574d55d0) = 3703
[pid  3703] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3703] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3703] setpgid(0, 0)               = 0
[pid  3703] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3703] write(3, "1000", 4)         = 4
[pid  3703] close(3)                    = 0
[pid  3703] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3703] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3703] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3703] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3704 attached
 <unfinished ...>
[pid  3704] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3703] <... clone resumed>, parent_tid=[3704], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3704
[pid  3704] <... set_robust_list resumed>) = 0
[pid  3703] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3703] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3704] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3704] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3704] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3703] <... futex resumed>)        = 0
[pid  3703] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3704] <... futex resumed>)        = 0
[pid  3703] <... futex resumed>)        = 1
[pid  3704] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3704] <... ioctl resumed>)        = 0
[pid  3704] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3703] <... futex resumed>)        = 0
[pid  3704] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3704] <... openat resumed>)       = 4
[pid  3703] <... futex resumed>)        = 0
[pid  3704] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3704] <... futex resumed>)        = 0
[pid  3703] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3704] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3704] <... socketpair resumed>[5, 6]) = 0
[pid  3703] <... futex resumed>)        = 0
[pid  3704] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3704] <... futex resumed>)        = 0
[pid  3703] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3704] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3703] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3704] <... ioctl resumed>)        = 0
[pid  3704] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3703] <... futex resumed>)        = 0
[pid  3704] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3704] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3703] <... futex resumed>)        = 0
[pid  3704] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3704] <... openat resumed>)       = 7
[pid  3704] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3703] <... futex resumed>)        = 0
[pid  3704] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3704] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3703] <... futex resumed>)        = 0
[pid  3704] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3704] <... ioctl resumed>)        = 0
[pid  3704] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3703] <... futex resumed>)        = 0
[pid  3704] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3704] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3703] <... futex resumed>)        = 0
[pid  3704] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3703] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3704] <... openat resumed>)       = 8
[pid  3704] write(8, "16", 2)           = 2
[pid  3704] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3703] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   59.608667][ T3704] debugfs: out of free dentries, can not create file 'timeout'
[pid  3703] exit_group(0)               = ?
[pid  3704] <... ioctl resumed>)        = ?
[   59.790656][ T3704] block nbd0: shutting down sockets
[pid  3704] +++ exited with 0 +++
[pid  3703] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3703, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3705 attached
, child_tidptr=0x5555574d55d0) = 3705
[pid  3705] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3705] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3705] setpgid(0, 0)               = 0
[pid  3705] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3705] write(3, "1000", 4)         = 4
[pid  3705] close(3)                    = 0
[pid  3705] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3705] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3705] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3705] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3706], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3706
[pid  3705] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3705] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3706 attached
 <unfinished ...>
[pid  3706] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3706] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3706] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3705] <... futex resumed>)        = 0
[pid  3705] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3705] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3706] <... futex resumed>)        = 1
[pid  3706] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3706] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3705] <... futex resumed>)        = 0
[pid  3705] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3705] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3706] <... futex resumed>)        = 1
[pid  3706] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3706] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3705] <... futex resumed>)        = 0
[pid  3705] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3705] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3706] <... futex resumed>)        = 1
[pid  3706] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3706] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3705] <... futex resumed>)        = 0
[pid  3705] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3705] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3706] <... futex resumed>)        = 1
[pid  3706] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3706] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3705] <... futex resumed>)        = 0
[pid  3706] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3705] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3706] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3705] <... futex resumed>)        = 0
[pid  3706] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3705] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3706] <... openat resumed>)       = 7
[pid  3706] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3705] <... futex resumed>)        = 0
[pid  3706] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3705] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3706] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3705] <... futex resumed>)        = 0
[pid  3705] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3706] <... ioctl resumed>)        = 0
[pid  3706] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3705] <... futex resumed>)        = 0
[pid  3706] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3705] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3706] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3705] <... futex resumed>)        = 0
[pid  3706] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3705] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3706] <... openat resumed>)       = 8
[pid  3706] write(8, "16", 2)           = 2
[pid  3706] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3705] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3705] exit_group(0)               = ?
[pid  3706] <... ioctl resumed>)        = ?
[   60.120669][ T3706] block nbd0: shutting down sockets
[pid  3706] +++ exited with 0 +++
[pid  3705] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3705, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3707 attached
, child_tidptr=0x5555574d55d0) = 3707
[pid  3707] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3707] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3707] setpgid(0, 0)               = 0
[pid  3707] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3707] write(3, "1000", 4)         = 4
[pid  3707] close(3)                    = 0
[pid  3707] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3707] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3707] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3707] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3708], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3708
[pid  3707] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3707] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3708 attached
 <unfinished ...>
[pid  3708] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3708] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3708] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3707] <... futex resumed>)        = 0
[pid  3707] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3707] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3708] <... futex resumed>)        = 1
[pid  3708] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3708] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3707] <... futex resumed>)        = 0
[pid  3707] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3707] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3708] <... futex resumed>)        = 1
[pid  3708] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3708] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3707] <... futex resumed>)        = 0
[pid  3707] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3707] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3708] <... futex resumed>)        = 1
[pid  3708] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3708] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3707] <... futex resumed>)        = 0
[pid  3707] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3707] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3708] <... futex resumed>)        = 1
[pid  3708] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3708] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3707] <... futex resumed>)        = 0
[pid  3708] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3707] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3708] <... openat resumed>)       = 7
[pid  3707] <... futex resumed>)        = 0
[pid  3708] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3707] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3708] <... futex resumed>)        = 0
[pid  3707] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3708] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3707] <... futex resumed>)        = 0
[pid  3707] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3708] <... ioctl resumed>)        = 0
[pid  3708] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3708] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3707] <... futex resumed>)        = 0
[pid  3707] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3708] <... futex resumed>)        = 0
[pid  3707] <... futex resumed>)        = 1
[pid  3708] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3707] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3708] <... openat resumed>)       = 8
[pid  3708] write(8, "16", 2)           = 2
[pid  3708] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3707] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   60.269652][ T3708] debugfs: out of free dentries, can not create file 'timeout'
[pid  3707] exit_group(0 <unfinished ...>
[pid  3708] <... ioctl resumed>)        = ?
[pid  3707] <... exit_group resumed>)   = ?
[pid  3708] +++ exited with 0 +++
[pid  3707] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3707, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   60.448423][ T3708] block nbd0: shutting down sockets
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3709 attached
, child_tidptr=0x5555574d55d0) = 3709
[pid  3709] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3709] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3709] setpgid(0, 0)               = 0
[pid  3709] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3709] write(3, "1000", 4)         = 4
[pid  3709] close(3)                    = 0
[pid  3709] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3709] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3709] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3709] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3710 attached
, parent_tid=[3710], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3710
[pid  3710] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3710] <... set_robust_list resumed>) = 0
[pid  3709] <... futex resumed>)        = 0
[pid  3710] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3710] <... openat resumed>)       = 3
[pid  3710] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3709] <... futex resumed>)        = 0
[pid  3710] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3710] <... ioctl resumed>)        = 0
[pid  3709] <... futex resumed>)        = 0
[pid  3710] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3710] <... futex resumed>)        = 0
[pid  3709] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3710] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3709] <... futex resumed>)        = 0
[pid  3710] <... openat resumed>)       = 4
[pid  3709] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3710] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3709] <... futex resumed>)        = 0
[pid  3710] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3710] <... socketpair resumed>[5, 6]) = 0
[pid  3709] <... futex resumed>)        = 0
[pid  3710] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3710] <... futex resumed>)        = 0
[pid  3709] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3710] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3710] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3709] <... futex resumed>)        = 0
[pid  3710] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3710] <... ioctl resumed>)        = 0
[pid  3710] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3709] <... futex resumed>)        = 0
[pid  3710] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3710] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3709] <... futex resumed>)        = 0
[pid  3710] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3710] <... openat resumed>)       = 7
[pid  3710] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3709] <... futex resumed>)        = 0
[pid  3710] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3710] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3709] <... futex resumed>)        = 0
[pid  3710] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3710] <... ioctl resumed>)        = 0
[pid  3710] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3709] <... futex resumed>)        = 0
[pid  3710] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3710] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3709] <... futex resumed>)        = 0
[pid  3710] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3709] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3710] <... openat resumed>)       = 8
[pid  3710] write(8, "16", 2)           = 2
[   60.588761][ T3710] debugfs: out of free dentries, can not create file 'timeout'
[pid  3710] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3709] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3709] exit_group(0 <unfinished ...>
[pid  3710] <... ioctl resumed>)        = ?
[pid  3709] <... exit_group resumed>)   = ?
[pid  3710] +++ exited with 0 +++
[pid  3709] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3709, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3711 attached
, child_tidptr=0x5555574d55d0) = 3711
[pid  3711] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3711] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3711] setpgid(0, 0)               = 0
[pid  3711] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3711] write(3, "1000", 4)         = 4
[pid  3711] close(3)                    = 0
[pid  3711] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3711] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3711] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3711] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3712], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3712
[pid  3711] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3711] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3712 attached
 <unfinished ...>
[pid  3712] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3712] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3712] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3711] <... futex resumed>)        = 0
[pid  3711] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3711] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3712] <... futex resumed>)        = 1
[pid  3712] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3712] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3711] <... futex resumed>)        = 0
[pid  3711] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3711] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3712] <... futex resumed>)        = 1
[pid  3712] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3712] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3711] <... futex resumed>)        = 0
[pid  3711] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3711] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3712] <... futex resumed>)        = 1
[pid  3712] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3712] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3711] <... futex resumed>)        = 0
[pid  3711] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3711] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3712] <... futex resumed>)        = 1
[   60.768708][ T3710] block nbd0: shutting down sockets
[pid  3712] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3712] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3711] <... futex resumed>)        = 0
[pid  3712] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3711] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3712] <... openat resumed>)       = 7
[pid  3711] <... futex resumed>)        = 0
[pid  3712] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3711] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3712] <... futex resumed>)        = 0
[pid  3711] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3712] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3711] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3711] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3712] <... ioctl resumed>)        = 0
[pid  3712] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3711] <... futex resumed>)        = 0
[pid  3712] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3711] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3712] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3711] <... futex resumed>)        = 0
[pid  3712] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3711] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3712] <... openat resumed>)       = 8
[pid  3712] write(8, "16", 2)           = 2
[pid  3712] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3711] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   60.868647][ T3712] debugfs: out of free dentries, can not create file 'timeout'
[pid  3711] exit_group(0)               = ?
[pid  3712] <... ioctl resumed>)        = ?
[pid  3712] +++ exited with 0 +++
[pid  3711] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3711, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
[   61.047806][ T3712] block nbd0: shutting down sockets
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3713 attached
, child_tidptr=0x5555574d55d0) = 3713
[pid  3713] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3713] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3713] setpgid(0, 0)               = 0
[pid  3713] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3713] write(3, "1000", 4)         = 4
[pid  3713] close(3)                    = 0
[pid  3713] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3713] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3713] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3713] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3714 attached
, parent_tid=[3714], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3714
[pid  3714] set_robust_list(0x7f6c23bb59e0, 24 <unfinished ...>
[pid  3713] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3714] <... set_robust_list resumed>) = 0
[pid  3713] <... futex resumed>)        = 0
[pid  3713] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3714] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3714] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3713] <... futex resumed>)        = 0
[pid  3713] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3714] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3713] <... futex resumed>)        = 0
[pid  3714] <... ioctl resumed>)        = 0
[pid  3713] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3714] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3713] <... futex resumed>)        = 0
[pid  3714] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3713] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3714] <... openat resumed>)       = 4
[pid  3713] <... futex resumed>)        = 0
[pid  3714] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3713] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3714] <... futex resumed>)        = 0
[pid  3713] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3713] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3714] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3713] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3714] <... socketpair resumed>[5, 6]) = 0
[pid  3714] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3714] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3713] <... futex resumed>)        = 0
[pid  3713] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3714] <... futex resumed>)        = 0
[pid  3713] <... futex resumed>)        = 1
[pid  3714] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3713] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3714] <... ioctl resumed>)        = 0
[pid  3714] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3713] <... futex resumed>)        = 0
[pid  3714] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3713] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3714] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3713] <... futex resumed>)        = 0
[pid  3714] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3713] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3714] <... openat resumed>)       = 7
[pid  3714] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3713] <... futex resumed>)        = 0
[pid  3714] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3713] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3714] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3713] <... futex resumed>)        = 0
[pid  3714] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3713] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3714] <... ioctl resumed>)        = 0
[pid  3714] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3713] <... futex resumed>)        = 0
[pid  3714] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3713] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3714] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3713] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3714] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 8
[pid  3714] write(8, "16", 2)           = 2
[pid  3714] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3713] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   61.179360][ T3714] debugfs: out of free dentries, can not create file 'timeout'
[pid  3713] exit_group(0)               = ?
[pid  3714] <... ioctl resumed>)        = ?
[   61.360573][ T3714] block nbd0: shutting down sockets
[pid  3714] +++ exited with 0 +++
[pid  3713] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3713, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555574d55d0) = 3715
./strace-static-x86_64: Process 3715 attached
[pid  3715] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3715] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3715] setpgid(0, 0)               = 0
[pid  3715] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3715] write(3, "1000", 4)         = 4
[pid  3715] close(3)                    = 0
[pid  3715] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3715] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3715] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3715] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3716], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3716
[pid  3715] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3715] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3716 attached
 <unfinished ...>
[pid  3716] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3716] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3716] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3715] <... futex resumed>)        = 0
[pid  3715] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3715] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3716] <... futex resumed>)        = 1
[pid  3716] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3716] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3715] <... futex resumed>)        = 0
[pid  3715] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3715] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3716] <... futex resumed>)        = 1
[pid  3716] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3716] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3715] <... futex resumed>)        = 0
[pid  3715] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3715] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3716] <... futex resumed>)        = 1
[pid  3716] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3716] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3715] <... futex resumed>)        = 0
[pid  3715] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3715] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3716] <... futex resumed>)        = 1
[pid  3716] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3716] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3715] <... futex resumed>)        = 0
[pid  3716] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3715] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3716] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3715] <... futex resumed>)        = 0
[pid  3716] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3715] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3716] <... openat resumed>)       = 7
[pid  3716] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3715] <... futex resumed>)        = 0
[pid  3716] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3715] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3716] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3715] <... futex resumed>)        = 0
[pid  3716] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3715] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3716] <... ioctl resumed>)        = 0
[pid  3716] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3715] <... futex resumed>)        = 0
[pid  3716] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3715] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3716] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3715] <... futex resumed>)        = 0
[pid  3716] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3715] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3716] <... openat resumed>)       = 8
[pid  3716] write(8, "16", 2)           = 2
[pid  3716] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3715] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   61.508589][ T3716] debugfs: out of free dentries, can not create file 'timeout'
[pid  3715] exit_group(0)               = ?
[pid  3716] <... ioctl resumed>)        = ?
[   61.689098][ T3716] block nbd0: shutting down sockets
[pid  3716] +++ exited with 0 +++
[pid  3715] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3715, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3717 attached
, child_tidptr=0x5555574d55d0) = 3717
[pid  3717] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3717] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3717] setpgid(0, 0)               = 0
[pid  3717] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3717] write(3, "1000", 4)         = 4
[pid  3717] close(3)                    = 0
[pid  3717] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3717] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3717] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3717] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3718], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3718
[pid  3717] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3717] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3718 attached
 <unfinished ...>
[pid  3718] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3718] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3718] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3717] <... futex resumed>)        = 0
[pid  3717] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3717] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3718] <... futex resumed>)        = 1
[pid  3718] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3718] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3717] <... futex resumed>)        = 0
[pid  3717] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3717] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3718] <... futex resumed>)        = 1
[pid  3718] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3718] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3717] <... futex resumed>)        = 0
[pid  3717] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3717] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3718] <... futex resumed>)        = 1
[pid  3718] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3718] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3717] <... futex resumed>)        = 0
[pid  3717] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3717] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3718] <... futex resumed>)        = 1
[pid  3718] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3718] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3717] <... futex resumed>)        = 0
[pid  3718] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3717] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3718] <... openat resumed>)       = 7
[pid  3717] <... futex resumed>)        = 0
[pid  3718] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3717] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3718] <... futex resumed>)        = 0
[pid  3717] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3718] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3717] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3718] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3717] <... futex resumed>)        = 0
[pid  3718] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3717] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3718] <... ioctl resumed>)        = 0
[pid  3718] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3717] <... futex resumed>)        = 0
[pid  3718] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3717] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3718] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3717] <... futex resumed>)        = 0
[pid  3718] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3717] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3718] <... openat resumed>)       = 8
[pid  3718] write(8, "16", 2)           = 2
[pid  3718] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3717] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   61.838485][ T3718] debugfs: out of free dentries, can not create file 'timeout'
[pid  3717] exit_group(0 <unfinished ...>
[pid  3718] <... ioctl resumed>)        = ?
[pid  3717] <... exit_group resumed>)   = ?
[pid  3718] +++ exited with 0 +++
[   62.021986][ T3718] block nbd0: shutting down sockets
[pid  3717] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3717, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3719 attached
, child_tidptr=0x5555574d55d0) = 3719
[pid  3719] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3719] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3719] setpgid(0, 0)               = 0
[pid  3719] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3719] write(3, "1000", 4)         = 4
[pid  3719] close(3)                    = 0
[pid  3719] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3719] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3719] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3719] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 3720 attached
, parent_tid=[3720], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3720
[pid  3719] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3719] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3720] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3720] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3720] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3719] <... futex resumed>)        = 0
[pid  3720] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3720] <... ioctl resumed>)        = 0
[pid  3719] <... futex resumed>)        = 0
[pid  3720] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3720] <... futex resumed>)        = 0
[pid  3720] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3719] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3720] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3719] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3720] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3719] <... futex resumed>)        = 0
[pid  3720] <... openat resumed>)       = 4
[pid  3719] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3720] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3719] <... futex resumed>)        = 0
[pid  3720] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3720] <... socketpair resumed>[5, 6]) = 0
[pid  3719] <... futex resumed>)        = 0
[pid  3720] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3720] <... futex resumed>)        = 0
[pid  3719] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3720] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3720] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3719] <... futex resumed>)        = 0
[pid  3720] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3720] <... ioctl resumed>)        = 0
[pid  3720] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3719] <... futex resumed>)        = 0
[pid  3720] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3719] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3720] <... openat resumed>)       = 7
[pid  3720] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3719] <... futex resumed>)        = 0
[pid  3720] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3720] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3719] <... futex resumed>)        = 0
[pid  3720] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3720] <... ioctl resumed>)        = 0
[pid  3720] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3719] <... futex resumed>)        = 0
[pid  3720] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3720] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3719] <... futex resumed>)        = 0
[pid  3720] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3719] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3720] <... openat resumed>)       = 8
[pid  3720] write(8, "16", 2)           = 2
[pid  3720] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3719] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3719] exit_group(0)               = ?
[pid  3720] <... ioctl resumed>)        = ?
[   62.352177][ T3720] block nbd0: shutting down sockets
[pid  3720] +++ exited with 0 +++
[pid  3719] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3719, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3721 attached
, child_tidptr=0x5555574d55d0) = 3721
[pid  3721] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3721] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3721] setpgid(0, 0)               = 0
[pid  3721] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3721] write(3, "1000", 4)         = 4
[pid  3721] close(3)                    = 0
[pid  3721] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3721] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3721] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3721] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3722], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3722
[pid  3721] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3721] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3722 attached
 <unfinished ...>
[pid  3722] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3722] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3722] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3721] <... futex resumed>)        = 0
[pid  3721] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3721] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3722] <... futex resumed>)        = 1
[pid  3722] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3722] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3721] <... futex resumed>)        = 0
[pid  3721] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3721] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3722] <... futex resumed>)        = 1
[pid  3722] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3722] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3721] <... futex resumed>)        = 0
[pid  3721] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3721] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3722] <... futex resumed>)        = 1
[pid  3722] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3722] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3721] <... futex resumed>)        = 0
[pid  3721] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3721] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3722] <... futex resumed>)        = 1
[pid  3722] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3722] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3721] <... futex resumed>)        = 0
[pid  3722] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3721] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3722] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3721] <... futex resumed>)        = 0
[pid  3722] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3721] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3722] <... openat resumed>)       = 7
[pid  3722] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3721] <... futex resumed>)        = 0
[pid  3722] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3721] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3722] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3721] <... futex resumed>)        = 0
[pid  3722] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3721] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3722] <... ioctl resumed>)        = 0
[pid  3722] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3721] <... futex resumed>)        = 0
[pid  3722] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3721] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3722] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3721] <... futex resumed>)        = 0
[pid  3722] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3721] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3722] <... openat resumed>)       = 8
[pid  3722] write(8, "16", 2)           = 2
[pid  3722] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3721] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   62.498665][ T3722] debugfs: out of free dentries, can not create file 'timeout'
[pid  3721] exit_group(0)               = ?
[pid  3722] <... ioctl resumed>)        = ?
[pid  3722] +++ exited with 0 +++
[pid  3721] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3721, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[   62.678449][ T3722] block nbd0: shutting down sockets
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555574d55d0) = 3723
./strace-static-x86_64: Process 3723 attached
[pid  3723] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3723] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3723] setpgid(0, 0)               = 0
[pid  3723] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3723] write(3, "1000", 4)         = 4
[pid  3723] close(3)                    = 0
[pid  3723] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3723] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3723] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3723] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3724], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3724
[pid  3723] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3723] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3724 attached
 <unfinished ...>
[pid  3724] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3724] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3724] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3723] <... futex resumed>)        = 0
[pid  3724] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3723] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3724] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3723] <... futex resumed>)        = 0
[pid  3723] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3724] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3724] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3723] <... futex resumed>)        = 0
[pid  3724] <... futex resumed>)        = 1
[pid  3723] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3724] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3723] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3724] <... openat resumed>)       = 4
[pid  3724] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3723] <... futex resumed>)        = 0
[pid  3724] <... futex resumed>)        = 1
[pid  3723] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3724] socketpair(AF_UNIX, SOCK_STREAM, 0,  <unfinished ...>
[pid  3723] <... futex resumed>)        = 0
[pid  3723] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3724] <... socketpair resumed>[5, 6]) = 0
[pid  3724] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3723] <... futex resumed>)        = 0
[pid  3724] <... futex resumed>)        = 1
[pid  3724] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3723] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3723] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3724] <... ioctl resumed>)        = 0
[pid  3724] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3723] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3724] <... futex resumed>)        = 0
[pid  3723] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3724] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3723] <... futex resumed>)        = 0
[pid  3724] <... openat resumed>)       = 7
[pid  3723] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3724] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3723] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3724] <... futex resumed>)        = 0
[pid  3723] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3724] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3723] <... futex resumed>)        = 0
[pid  3723] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3724] <... ioctl resumed>)        = 0
[pid  3724] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3723] <... futex resumed>)        = 0
[pid  3724] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3723] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3724] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3724] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3723] <... futex resumed>)        = 0
[pid  3724] <... openat resumed>)       = 8
[pid  3724] write(8, "16", 2 <unfinished ...>
[pid  3723] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3724] <... write resumed>)        = 2
[pid  3724] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3723] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3723] exit_group(0 <unfinished ...>
[pid  3724] <... ioctl resumed>)        = ?
[pid  3723] <... exit_group resumed>)   = ?
[   63.011416][ T3724] block nbd0: shutting down sockets
[pid  3724] +++ exited with 0 +++
[pid  3723] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3723, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3725 attached
, child_tidptr=0x5555574d55d0) = 3725
[pid  3725] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3725] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3725] setpgid(0, 0)               = 0
[pid  3725] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3725] write(3, "1000", 4)         = 4
[pid  3725] close(3)                    = 0
[pid  3725] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3725] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3725] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3725] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3726], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3726
[pid  3725] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3725] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3726 attached
 <unfinished ...>
[pid  3726] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3726] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3726] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3725] <... futex resumed>)        = 0
[pid  3725] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3725] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3726] <... futex resumed>)        = 1
[pid  3726] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3726] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3725] <... futex resumed>)        = 0
[pid  3725] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3726] <... futex resumed>)        = 1
[pid  3725] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3726] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3726] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3725] <... futex resumed>)        = 0
[pid  3725] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3725] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3726] <... futex resumed>)        = 1
[pid  3726] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3726] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3725] <... futex resumed>)        = 0
[pid  3725] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3725] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3726] <... futex resumed>)        = 1
[pid  3726] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3726] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3725] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3726] <... futex resumed>)        = 0
[pid  3725] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3725] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3726] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 7
[pid  3726] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3725] <... futex resumed>)        = 0
[pid  3726] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3725] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3726] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3725] <... futex resumed>)        = 0
[pid  3726] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3725] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3726] <... ioctl resumed>)        = 0
[pid  3726] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3725] <... futex resumed>)        = 0
[pid  3726] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3725] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3726] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3725] <... futex resumed>)        = 0
[pid  3726] <... openat resumed>)       = 8
[pid  3725] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3726] write(8, "16", 2)           = 2
[pid  3726] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3725] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   63.189456][ T3726] debugfs: out of free dentries, can not create file 'timeout'
[pid  3725] exit_group(0)               = ?
[pid  3726] <... ioctl resumed>)        = ?
[   63.370863][ T3726] block nbd0: shutting down sockets
[pid  3726] +++ exited with 0 +++
[pid  3725] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3725, si_uid=0, si_status=0, si_utime=1, si_stime=3} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3727 attached
, child_tidptr=0x5555574d55d0) = 3727
[pid  3727] set_robust_list(0x5555574d55e0, 24) = 0
[pid  3727] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3727] setpgid(0, 0)               = 0
[pid  3727] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3727] write(3, "1000", 4)         = 4
[pid  3727] close(3)                    = 0
[pid  3727] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3727] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b95000
[pid  3727] mprotect(0x7f6c23b96000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3727] clone(child_stack=0x7f6c23bb53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3728], tls=0x7f6c23bb5700, child_tidptr=0x7f6c23bb59d0) = 3728
[pid  3727] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3727] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3728 attached
 <unfinished ...>
[pid  3728] set_robust_list(0x7f6c23bb59e0, 24) = 0
[pid  3728] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3728] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3727] <... futex resumed>)        = 0
[pid  3727] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3727] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3728] <... futex resumed>)        = 1
[pid  3728] ioctl(3, NBD_SET_FLAGS, NBD_FLAG_HAS_FLAGS|NBD_FLAG_READ_ONLY|NBD_FLAG_SEND_FLUSH|NBD_FLAG_SEND_FUA|NBD_FLAG_ROTATIONAL|NBD_FLAG_SEND_TRIM|NBD_FLAG_SEND_WRITE_ZEROES|NBD_FLAG_SEND_DF|NBD_FLAG_CAN_MULTI_CONN|NBD_FLAG_SEND_RESIZE) = 0
[pid  3728] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3727] <... futex resumed>)        = 0
[pid  3727] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3727] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3728] <... futex resumed>)        = 1
[pid  3728] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3728] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3727] <... futex resumed>)        = 0
[pid  3727] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3727] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3728] <... futex resumed>)        = 1
[pid  3728] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3728] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3727] <... futex resumed>)        = 0
[pid  3727] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3727] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3728] <... futex resumed>)        = 1
[pid  3728] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3727] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3727] futex(0x7f6c23c8c4fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3727] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6c23b74000
[pid  3727] mprotect(0x7f6c23b75000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3727] clone(child_stack=0x7f6c23b943f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3729], tls=0x7f6c23b94700, child_tidptr=0x7f6c23b949d0) = 3729
[pid  3727] futex(0x7f6c23c8c4f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3727] futex(0x7f6c23c8c4fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3729 attached
 <unfinished ...>
[pid  3729] set_robust_list(0x7f6c23b949e0, 24) = 0
[pid  3729] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 7
[pid  3729] futex(0x7f6c23c8c4fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3727] <... futex resumed>)        = 0
[pid  3727] futex(0x7f6c23c8c4f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3727] futex(0x7f6c23c8c4fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3729] <... futex resumed>)        = 1
[pid  3729] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3728] <... ioctl resumed>)        = 0
[pid  3728] futex(0x7f6c23c8c4ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3728] futex(0x7f6c23c8c4e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3729] <... ioctl resumed>)        = -1 EBUSY (Device or resource busy)
[pid  3729] futex(0x7f6c23c8c4fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3729] futex(0x7f6c23c8c4f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3727] <... futex resumed>)        = 0
[pid  3727] futex(0x7f6c23c8c4e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3728] <... futex resumed>)        = 0
[pid  3727] <... futex resumed>)        = 1
[pid  3728] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3727] futex(0x7f6c23c8c4ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3728] <... openat resumed>)       = 8
[pid  3728] write(8, "16", 2)           = 2
[   63.525731][ T3729] block nbd0: Device being setup by another task
[pid  3728] ioctl(7, NBD_DO_IT <unfinished ...>
[pid  3727] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   63.565930][ T3728] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
[   63.577639][ T3728] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
[   63.586045][ T3728] CPU: 0 PID: 3728 Comm: syz-executor414 Not tainted 5.19.0-rc3-next-20220624-syzkaller #0
[   63.596027][ T3728] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   63.606083][ T3728] RIP: 0010:blk_mq_free_rqs+0x3f8/0x960
[   63.611649][ T3728] Code: de e8 0c f0 96 fd 83 fb 3f 0f 87 7e f2 61 05 e8 ae f3 96 fd b8 00 10 00 00 89 d9 48 d3 e0 4c 01 e8 48 89 44 24 08 48 8b 04 24 <0f> b6 00 84 c0 74 08 3c 03 0f 8e 96 03 00 00 41 8b 1f 31 ff 31 ed
[   63.631258][ T3728] RSP: 0018:ffffc9000325faa8 EFLAGS: 00010286
[   63.637320][ T3728] RAX: dffffc0000000000 RBX: 0000000000000004 RCX: 0000000000000004
[   63.645288][ T3728] RDX: ffff88807dc7d7c0 RSI: ffffffff83e3bb02 RDI: 0000000000000005
[   63.653253][ T3728] RBP: ffff888027059000 R08: 0000000000000005 R09: 000000000000003f
[   63.661216][ T3728] R10: 0000000000000004 R11: 0000000000000001 R12: ffffc9000325fb60
[   63.669181][ T3728] R13: ffff888074500000 R14: ffff88801dee3000 R15: 0000000000000000
[   63.677147][ T3728] FS:  00007f6c23bb5700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
[   63.686076][ T3728] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   63.692661][ T3728] CR2: 00007f6c23c70aa6 CR3: 0000000017990000 CR4: 00000000003506f0
[   63.700628][ T3728] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   63.708596][ T3728] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   63.716560][ T3728] Call Trace:
[   63.719833][ T3728]  <TASK>
[   63.722761][ T3728]  ? _raw_spin_unlock_irq+0x1f/0x40
[   63.727963][ T3728]  blk_mq_sched_free_rqs+0x1d4/0x250
[   63.733255][ T3728]  ? blk_mq_sched_insert_requests+0x9a0/0x9a0
[   63.739329][ T3728]  ? kobject_put+0xb9/0x540
[   63.743829][ T3728]  ? kobject_del+0x44/0x60
[   63.748242][ T3728]  elevator_switch_mq+0xc2/0x6c0
[   63.753187][ T3728]  blk_mq_update_nr_hw_queues+0x3ee/0xdf0
[   63.758914][ T3728]  ? blk_mq_init_queue+0x140/0x140
[   63.764026][ T3728]  ? tomoyo_execute_permission+0x4a0/0x4a0
[   63.769835][ T3728]  nbd_start_device+0x153/0xc30
[   63.774692][ T3728]  ? bpf_lsm_capable+0x5/0x10
[   63.779378][ T3728]  ? security_capable+0x8f/0xc0
[   63.784226][ T3728]  nbd_ioctl+0x5a5/0xbd0
[   63.788474][ T3728]  ? blkdev_bszset+0x1f0/0x1f0
[   63.793244][ T3728]  ? nbd_start_device+0xc30/0xc30
[   63.798277][ T3728]  ? find_held_lock+0x2d/0x110
[   63.803050][ T3728]  ? ptrace_notify+0xfa/0x140
[   63.807728][ T3728]  ? nbd_start_device+0xc30/0xc30
[   63.812762][ T3728]  blkdev_ioctl+0x36e/0x800
[   63.817268][ T3728]  ? blkdev_common_ioctl+0x1a50/0x1a50
[   63.822738][ T3728]  ? bpf_lsm_file_ioctl+0x5/0x10
[   63.827683][ T3728]  ? blkdev_common_ioctl+0x1a50/0x1a50
[   63.833148][ T3728]  __x64_sys_ioctl+0x193/0x200
[   63.837921][ T3728]  do_syscall_64+0x35/0xb0
[   63.842339][ T3728]  entry_SYSCALL_64_after_hwframe+0x46/0xb0
[   63.848232][ T3728] RIP: 0033:0x7f6c23c08319
[   63.852646][ T3728] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[   63.872249][ T3728] RSP: 002b:00007f6c23bb52e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   63.880661][ T3728] RAX: ffffffffffffffda RBX: 00007f6c23c8c4e0 RCX: 00007f6c23c08319
[   63.888629][ T3728] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007
[   63.896597][ T3728] RBP: 00007f6c23c59194 R08: 0000000000000002 R09: 0000000000003631
[   63.904562][ T3728] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6c23c8c4ec
[   63.912532][ T3728] R13: 00007f6c23bb52f0 R14: 00007f6c23c8c4e8 R15: 0000000000000002
[   63.920500][ T3728]  </TASK>
[   63.923515][ T3728] Modules linked in:
[   63.927738][ T3728] ---[ end trace 0000000000000000 ]---
[   63.933341][ T3728] RIP: 0010:blk_mq_free_rqs+0x3f8/0x960
[   63.939030][ T3728] Code: de e8 0c f0 96 fd 83 fb 3f 0f 87 7e f2 61 05 e8 ae f3 96 fd b8 00 10 00 00 89 d9 48 d3 e0 4c 01 e8 48 89 44 24 08 48 8b 04 24 <0f> b6 00 84 c0 74 08 3c 03 0f 8e 96 03 00 00 41 8b 1f 31 ff 31 ed
[   63.958787][ T3728] RSP: 0018:ffffc9000325faa8 EFLAGS: 00010286
[   63.964848][ T3728] RAX: dffffc0000000000 RBX: 0000000000000004 RCX: 0000000000000004
[   63.972951][ T3728] RDX: ffff88807dc7d7c0 RSI: ffffffff83e3bb02 RDI: 0000000000000005
[   63.981094][ T3728] RBP: ffff888027059000 R08: 0000000000000005 R09: 000000000000003f
[   63.989177][ T3728] R10: 0000000000000004 R11: 0000000000000001 R12: ffffc9000325fb60
[   63.997355][ T3728] R13: ffff888074500000 R14: ffff88801dee3000 R15: 0000000000000000
[   64.005340][ T3728] FS:  00007f6c23bb5700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
[   64.014432][ T3728] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   64.021170][ T3728] CR2: 00007f6c23c70aa6 CR3: 0000000017990000 CR4: 00000000003506f0
[   64.029312][ T3728] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   64.037523][ T3728] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   64.045505][ T3728] Kernel panic - not syncing: Fatal exception
[   64.051721][ T3728] Kernel Offset: disabled
[   64.056039][ T3728] Rebooting in 86400 seconds..