./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2659442020

<...>
DUID 00:04:06:88:74:a7:04:75:62:cb:55:93:34:09:94:90:e1:fe
forked to background, child pid 3189
[   36.301450][ T3190] 8021q: adding VLAN 0 to HW filter on device bond0
[   36.310805][ T3190] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: OK

syzkaller
Warning: Permanently added '10.128.1.42' (ECDSA) to the list of known hosts.
execve("./syz-executor2659442020", ["./syz-executor2659442020"], 0x7ffe279a0490 /* 10 vars */) = 0
brk(NULL)                               = 0x5555571d4000
brk(0x5555571d4c40)                     = 0x5555571d4c40
arch_prctl(ARCH_SET_FS, 0x5555571d4300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
set_tid_address(0x5555571d45d0)         = 3617
set_robust_list(0x5555571d45e0, 24)     = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7fdef6e323c0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7fdef6e32a90}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7fdef6e32460, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fdef6e32a90}, 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-executor2659442020", 4096) = 28
brk(0x5555571f5c40)                     = 0x5555571f5c40
brk(0x5555571f6000)                     = 0x5555571f6000
mprotect(0x7fdef6ef3000, 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 3618 attached
, child_tidptr=0x5555571d45d0) = 3618
[pid  3618] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3618] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3618] setpgid(0, 0)               = 0
[pid  3618] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3618] write(3, "1000", 4)         = 4
[pid  3618] close(3)                    = 0
[pid  3618] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3618] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3618] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3618] clone(child_stack=0x7fdef6e223f0, 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 3619 attached
, parent_tid=[3619], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3619
[pid  3618] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3618] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3619] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3619] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3619] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3618] <... futex resumed>)        = 0
[pid  3618] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3618] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3619] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3619] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3618] <... futex resumed>)        = 0
[pid  3618] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3618] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3619] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3619] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3618] <... futex resumed>)        = 0
[pid  3618] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3618] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3619] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3619] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3618] <... futex resumed>)        = 0
[pid  3619] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3618] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3619] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3618] <... futex resumed>)        = 0
[pid  3619] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3618] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3619] <... ioctl resumed>)        = 0
[pid  3619] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3618] <... futex resumed>)        = 0
[pid  3619] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3618] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3619] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3618] <... futex resumed>)        = 0
[pid  3619] 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3618] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3619] <... ioctl resumed>)        = 0
[pid  3619] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3618] <... futex resumed>)        = 0
[pid  3619] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3618] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3619] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3618] <... futex resumed>)        = 0
[pid  3619] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3618] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3619] <... openat resumed>)       = 6
[pid  3619] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3618] <... futex resumed>)        = 0
[pid  3619] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3618] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3619] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3618] <... futex resumed>)        = 0
[pid  3619] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3618] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3619] <... openat resumed>)       = 7
[pid  3619] write(7, "5", 1)            = 1
[pid  3619] ioctl(6, NBD_DO_IT <unfinished ...>
[pid  3618] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3619] <... ioctl resumed>)        = 0
[pid  3619] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3619] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3618] exit_group(0)               = ?
[pid  3619] <... futex resumed>)        = ?
[pid  3619] +++ exited with 0 +++
[pid  3618] +++ exited with 0 +++
syzkaller login: [   58.133144][   T48] block nbd0: Receive control failed (result -107)
[   58.134075][   T48] block nbd0: Receive control failed (result -32)
[   58.148194][ T3619] block nbd0: shutting down sockets
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3618, 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 3622 attached
, child_tidptr=0x5555571d45d0) = 3622
[pid  3622] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3622] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3622] setpgid(0, 0)               = 0
[pid  3622] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3622] write(3, "1000", 4)         = 4
[pid  3622] close(3)                    = 0
[pid  3622] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3622] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3622] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3622] clone(child_stack=0x7fdef6e223f0, 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 3623 attached
, parent_tid=[3623], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3623
[pid  3622] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3622] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3623] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3623] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3622] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3622] futex(0x7fdef6ef94fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3622] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6de1000
[pid  3622] mprotect(0x7fdef6de2000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3622] clone(child_stack=0x7fdef6e013f0, 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
, parent_tid=[3624], tls=0x7fdef6e01700, child_tidptr=0x7fdef6e019d0) = 3624
[pid  3622] futex(0x7fdef6ef94f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3622] futex(0x7fdef6ef94fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3624] set_robust_list(0x7fdef6e019e0, 24) = 0
[pid  3624] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3623] <... openat resumed>)       = 3
[pid  3623] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3624] <... openat resumed>)       = 4
[pid  3623] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3624] futex(0x7fdef6ef94fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3622] <... futex resumed>)        = 0
[pid  3622] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3623] <... futex resumed>)        = 0
[pid  3622] <... futex resumed>)        = 1
[pid  3623] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3622] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3623] <... socket resumed>)       = 5
[pid  3623] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3622] <... futex resumed>)        = 0
[pid  3623] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3622] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3623] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3622] <... futex resumed>)        = 0
[pid  3623] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3622] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3624] futex(0x7fdef6ef94f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3623] <... ioctl resumed>)        = 0
[pid  3623] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3622] <... futex resumed>)        = 0
[pid  3623] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3622] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3622] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3623] <... ioctl resumed>)        = 0
[pid  3623] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3622] <... futex resumed>)        = 0
[pid  3622] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3622] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3623] 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|NBD_FLAG_SEND_CACHE) = 0
[pid  3623] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3622] <... futex resumed>)        = 0
[pid  3623] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3622] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3623] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3623] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3622] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3623] <... openat resumed>)       = 6
[pid  3623] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3622] <... futex resumed>)        = 0
[pid  3623] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3622] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3623] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3622] <... futex resumed>)        = 0
[pid  3623] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3622] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3623] <... openat resumed>)       = 7
[pid  3623] write(7, "5", 1)            = 1
[pid  3623] ioctl(6, NBD_DO_IT)         = 0
[pid  3623] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3622] <... futex resumed>)        = 0
[pid  3623] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3622] exit_group(0 <unfinished ...>
[pid  3624] <... futex resumed>)        = ?
[pid  3623] <... futex resumed>)        = ?
[pid  3622] <... exit_group resumed>)   = ?
[pid  3624] +++ exited with 0 +++
[pid  3623] +++ exited with 0 +++
[pid  3622] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3622, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3625
./strace-static-x86_64: Process 3625 attached
[pid  3625] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3625] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3625] clone(child_stack=0x7fdef6e223f0, 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 3626 attached
, parent_tid=[3626], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3626
[pid  3625] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3626] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3626] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3625] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3626] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3625] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3626] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3625] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3625] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[   58.342046][ T3620] block nbd0: Receive control failed (result -107)
[   58.342123][ T3620] block nbd0: Receive control failed (result -32)
[   58.357995][ T3622] block nbd0: shutting down sockets
[pid  3626] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3626] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3626] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3625] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3626] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3625] <... futex resumed>)        = 0
[pid  3626] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3625] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... ioctl resumed>)        = 0
[pid  3626] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3626] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3625] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3626] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3625] <... futex resumed>)        = 0
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3625] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... ioctl resumed>)        = 0
[pid  3626] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3626] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3625] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... openat resumed>)       = 6
[pid  3626] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3626] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3625] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3626] <... openat resumed>)       = 7
[pid  3626] write(7, "5", 1)            = 1
[pid  3626] ioctl(6, NBD_DO_IT)         = 0
[pid  3626] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3625] <... futex resumed>)        = 0
[pid  3626] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3625] exit_group(0 <unfinished ...>
[pid  3626] <... futex resumed>)        = ?
[pid  3625] <... exit_group resumed>)   = ?
[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=1} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3627
./strace-static-x86_64: Process 3627 attached
[pid  3627] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3627] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3627] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3627] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3628], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3628
[pid  3627] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3627] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3628 attached
 <unfinished ...>
[pid  3628] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3628] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3628] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3628] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3627] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3628] <... openat resumed>)       = 4
[pid  3627] <... futex resumed>)        = 0
[pid  3628] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3627] futex(0x7fdef6ef94ec, 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  3627] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3627] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3628] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3627] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3627] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3628] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3628] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3627] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3628] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3627] <... futex resumed>)        = 0
[pid  3628] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[   58.479586][   T48] block nbd0: Receive control failed (result -107)
[   58.479654][   T48] block nbd0: Receive control failed (result -32)
[   58.499242][ T3625] block nbd0: shutting down sockets
[pid  3627] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] <... ioctl resumed>)        = 0
[pid  3628] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3628] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3627] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3628] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3627] <... 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3627] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] <... ioctl resumed>)        = 0
[pid  3628] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3628] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3627] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3628] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3627] <... futex resumed>)        = 0
[pid  3628] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3627] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] <... openat resumed>)       = 6
[pid  3628] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3628] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3627] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3628] <... openat resumed>)       = 7
[pid  3628] write(7, "5", 1)            = 1
[pid  3628] ioctl(6, NBD_DO_IT)         = 0
[pid  3628] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3627] <... futex resumed>)        = 0
[pid  3628] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3627] exit_group(0 <unfinished ...>
[pid  3628] <... futex resumed>)        = ?
[pid  3627] <... exit_group 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=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3629 attached
, child_tidptr=0x5555571d45d0) = 3629
[pid  3629] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3629] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3629] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3629] clone(child_stack=0x7fdef6e223f0, 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=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3630
[pid  3629] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 3630 attached
) = 0
[pid  3629] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3630] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3630] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3629] <... futex resumed>)        = 0
[pid  3630] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3629] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3630] <... openat resumed>)       = 4
[pid  3629] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3629] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3630] <... futex resumed>)        = 0
[pid  3629] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3630] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3629] <... futex resumed>)        = 0
[pid  3630] <... socket resumed>)       = 5
[pid  3629] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3629] <... futex resumed>)        = 0
[pid  3630] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3629] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3629] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... ioctl resumed>)        = 0
[   58.599552][ T3620] block nbd0: Receive control failed (result -107)
[   58.599643][ T3620] block nbd0: Receive control failed (result -32)
[   58.618911][ T3627] block nbd0: shutting down sockets
[pid  3630] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3629] <... futex resumed>)        = 0
[pid  3630] <... futex resumed>)        = 1
[pid  3629] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3630] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3629] <... futex resumed>)        = 0
[pid  3629] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... ioctl resumed>)        = 0
[pid  3630] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3629] <... futex resumed>)        = 0
[pid  3630] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3629] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3630] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3629] <... futex resumed>)        = 0
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3629] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... ioctl resumed>)        = 0
[pid  3630] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3629] <... futex resumed>)        = 0
[pid  3630] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3629] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3630] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3629] <... futex resumed>)        = 0
[pid  3630] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3629] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... openat resumed>)       = 6
[pid  3630] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3629] <... futex resumed>)        = 0
[pid  3630] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3629] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3630] <... openat resumed>)       = 7
[pid  3630] write(7, "5", 1)            = 1
[pid  3630] ioctl(6, NBD_DO_IT)         = 0
[pid  3630] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3629] <... futex resumed>)        = 0
[pid  3630] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3629] exit_group(0 <unfinished ...>
[pid  3630] <... futex resumed>)        = ?
[pid  3629] <... exit_group resumed>)   = ?
[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=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3631
./strace-static-x86_64: Process 3631 attached
[pid  3631] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3631] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3631] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3631] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3632], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3632
[pid  3631] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3631] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3632 attached
 <unfinished ...>
[pid  3632] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3632] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3632] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3631] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3631] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3632] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3632] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3631] <... futex resumed>)        = 0
[pid  3632] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3631] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3632] <... socket resumed>)       = 5
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3631] futex(0x7fdef6ef94ec, 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] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3631] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[   58.730047][   T48] block nbd0: Receive control failed (result -107)
[   58.730125][   T48] block nbd0: Receive control failed (result -32)
[   58.743854][ T3621] block nbd0: shutting down sockets
[pid  3631] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... ioctl resumed>)        = 0
[pid  3632] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3631] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... ioctl resumed>)        = 0
[pid  3632] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3631] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3632] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3631] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... ioctl resumed>)        = 0
[pid  3632] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3631] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3632] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3631] <... futex resumed>)        = 0
[pid  3632] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3631] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... openat resumed>)       = 6
[pid  3632] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3631] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3632] <... openat resumed>)       = 7
[pid  3632] write(7, "5", 1)            = 1
[pid  3632] ioctl(6, NBD_DO_IT)         = 0
[pid  3632] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3631] <... futex resumed>)        = 0
[pid  3632] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3631] exit_group(0 <unfinished ...>
[pid  3632] <... futex resumed>)        = ?
[pid  3631] <... exit_group resumed>)   = ?
[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=1} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3633
./strace-static-x86_64: Process 3633 attached
[pid  3633] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3633] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3633] clone(child_stack=0x7fdef6e223f0, 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=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3634
[pid  3633] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3634 attached
 <unfinished ...>
[pid  3634] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3634] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3634] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3633] <... futex resumed>)        = 0
[pid  3633] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] futex(0x7fdef6ef94ec, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3633] <... futex resumed>)        = 0
[pid  3633] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... futex resumed>)        = 1
[pid  3634] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3634] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3633] <... futex resumed>)        = 0
[pid  3633] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3633] futex(0x7fdef6ef94ec, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3633] <... futex resumed>)        = 0
[pid  3634] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3633] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3634] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3633] <... futex resumed>)        = 0
[pid  3634] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[   58.871028][ T3620] block nbd0: Receive control failed (result -107)
[   58.871172][ T3620] block nbd0: Receive control failed (result -32)
[   58.876173][ T3631] block nbd0: shutting down sockets
[pid  3633] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... ioctl resumed>)        = 0
[pid  3634] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3633] <... futex resumed>)        = 0
[pid  3633] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3633] <... futex resumed>)        = 0
[pid  3634] <... ioctl resumed>)        = 0
[pid  3633] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3633] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3634] <... futex resumed>)        = 0
[pid  3633] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3634] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3633] <... futex resumed>)        = 0
[pid  3633] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... openat resumed>)       = 6
[pid  3634] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3633] <... futex resumed>)        = 0
[pid  3634] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3633] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3634] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3633] <... futex resumed>)        = 0
[pid  3634] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3633] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3634] <... openat resumed>)       = 7
[pid  3634] write(7, "5", 1)            = 1
[pid  3634] ioctl(6, NBD_DO_IT)         = 0
[pid  3634] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3633] <... futex resumed>)        = 0
[pid  3634] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3633] exit_group(0)               = ?
[pid  3634] <... futex resumed>)        = ?
[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=1} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3635 attached
, child_tidptr=0x5555571d45d0) = 3635
[pid  3635] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3635] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3635] clone(child_stack=0x7fdef6e223f0, 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 3636 attached
, parent_tid=[3636], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3636
[pid  3635] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3636] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3636] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3635] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3636] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3635] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3636] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3635] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[   58.978733][   T48] block nbd0: Receive control failed (result -107)
[   58.978848][   T48] block nbd0: Receive control failed (result -32)
[   58.998936][ T3634] block nbd0: shutting down sockets
[pid  3636] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3636] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3635] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3636] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3635] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] <... ioctl resumed>)        = 0
[pid  3636] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3635] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[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|NBD_FLAG_SEND_CACHE) = 0
[pid  3636] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3635] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 6
[pid  3636] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3636] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3635] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3635] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3636] <... openat resumed>)       = 7
[pid  3636] write(7, "5", 1)            = 1
[   59.112453][   T48] block nbd0: Receive control failed (result -107)
[   59.112527][   T48] block nbd0: Receive control failed (result -32)
[pid  3636] ioctl(6, NBD_DO_IT)         = 0
[pid  3636] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3635] <... futex resumed>)        = 0
[pid  3635] exit_group(0)               = ?
[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} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3637
./strace-static-x86_64: Process 3637 attached
[pid  3637] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3637] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3637] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3637] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3638], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3638
[pid  3637] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3637] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3638 attached
 <unfinished ...>
[pid  3638] set_robust_list(0x7fdef6e229e0, 24) = 0
[   59.162868][ T3636] block nbd0: shutting down sockets
[pid  3638] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3638] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3637] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3637] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3638] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3638] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3637] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3637] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3638] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3637] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3637] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3638] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3637] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... ioctl resumed>)        = 0
[pid  3638] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3637] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3638] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3637] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... ioctl resumed>)        = 0
[pid  3638] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3637] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... openat resumed>)       = 6
[pid  3638] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3637] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3638] <... openat resumed>)       = 7
[pid  3638] write(7, "5", 1)            = 1
[pid  3638] ioctl(6, NBD_DO_IT)         = 0
[pid  3638] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3637] <... futex resumed>)        = 0
[pid  3638] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3637] exit_group(0 <unfinished ...>
[pid  3638] <... futex resumed>)        = ?
[pid  3637] <... exit_group resumed>)   = ?
[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=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3639 attached
, child_tidptr=0x5555571d45d0) = 3639
[pid  3639] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3639] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3639] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3639] clone(child_stack=0x7fdef6e223f0, 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 3640 attached
, parent_tid=[3640], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3640
[pid  3639] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3640] set_robust_list(0x7fdef6e229e0, 24 <unfinished ...>
[pid  3639] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... set_robust_list resumed>) = 0
[pid  3640] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3640] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3639] <... futex resumed>)        = 0
[pid  3640] <... futex resumed>)        = 1
[pid  3639] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3639] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3640] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3639] <... futex resumed>)        = 0
[pid  3640] <... futex resumed>)        = 1
[pid  3639] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3639] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3640] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3639] <... futex resumed>)        = 0
[pid  3639] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3639] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... futex resumed>)        = 1
[   59.313472][ T3620] block nbd0: Receive control failed (result -107)
[   59.313549][ T3620] block nbd0: Receive control failed (result -32)
[   59.318993][ T3637] block nbd0: shutting down sockets
[pid  3640] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3640] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3640] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3639] <... futex resumed>)        = 0
[pid  3639] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3640] <... futex resumed>)        = 0
[pid  3639] <... futex resumed>)        = 1
[pid  3640] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3639] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... ioctl resumed>)        = 0
[pid  3640] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3639] <... futex resumed>)        = 0
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3639] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3640] <... ioctl resumed>)        = 0
[pid  3639] <... futex resumed>)        = 0
[pid  3640] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3639] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] <... futex resumed>)        = 0
[pid  3640] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3639] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3640] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3639] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3640] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3639] <... futex resumed>)        = 0
[pid  3640] <... openat resumed>)       = 6
[pid  3639] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3639] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3640] <... futex resumed>)        = 0
[pid  3639] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3640] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3639] <... futex resumed>)        = 0
[pid  3640] <... openat resumed>)       = 7
[pid  3639] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3640] write(7, "5", 1)            = 1
[pid  3640] ioctl(6, NBD_DO_IT)         = 0
[pid  3640] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3639] <... futex resumed>)        = 0
[pid  3639] exit_group(0)               = ?
[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=1} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3641 attached
, child_tidptr=0x5555571d45d0) = 3641
[pid  3641] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3641] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3641] clone(child_stack=0x7fdef6e223f0, 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=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3642
[pid  3641] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3642 attached
 <unfinished ...>
[pid  3642] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3642] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3642] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3641] <... futex resumed>)        = 0
[pid  3641] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] futex(0x7fdef6ef94ec, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3641] <... futex resumed>)        = 0
[pid  3641] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... futex resumed>)        = 1
[pid  3642] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3642] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3641] <... futex resumed>)        = 0
[pid  3641] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3641] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... futex resumed>)        = 1
[pid  3642] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3641] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   59.451762][   T48] block nbd0: Receive control failed (result -107)
[   59.451838][   T48] block nbd0: Receive control failed (result -32)
[   59.469569][ T3640] block nbd0: shutting down sockets
[pid  3641] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0} <unfinished ...>
[pid  3642] <... ioctl resumed>)        = 0
[pid  3642] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3641] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3642] <... futex resumed>)        = 0
[pid  3641] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3642] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3641] <... futex resumed>)        = 0
[pid  3641] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... ioctl resumed>)        = 0
[pid  3642] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3641] <... futex resumed>)        = 0
[pid  3642] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3641] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3642] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3641] <... futex resumed>)        = 0
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3641] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... ioctl resumed>)        = 0
[pid  3642] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3641] <... futex resumed>)        = 0
[pid  3642] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3641] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3642] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3641] <... futex resumed>)        = 0
[pid  3642] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3641] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... openat resumed>)       = 6
[pid  3642] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3641] <... futex resumed>)        = 0
[pid  3642] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3641] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3642] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3641] <... futex resumed>)        = 0
[pid  3642] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3641] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3642] <... openat resumed>)       = 7
[pid  3642] write(7, "5", 1)            = 1
[pid  3642] ioctl(6, NBD_DO_IT)         = 0
[pid  3642] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3641] <... futex resumed>)        = 0
[pid  3642] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3641] exit_group(0 <unfinished ...>
[pid  3642] <... futex resumed>)        = ?
[pid  3641] <... exit_group resumed>)   = ?
[pid  3642] +++ 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=2} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3643
./strace-static-x86_64: Process 3643 attached
[pid  3643] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3643] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3643] setpgid(0, 0)               = 0
[pid  3643] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3643] write(3, "1000", 4)         = 4
[pid  3643] close(3)                    = 0
[pid  3643] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3643] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3643] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3643] clone(child_stack=0x7fdef6e223f0, 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 3644 attached
 <unfinished ...>
[pid  3644] set_robust_list(0x7fdef6e229e0, 24 <unfinished ...>
[pid  3643] <... clone resumed>, parent_tid=[3644], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3644
[pid  3644] <... set_robust_list resumed>) = 0
[pid  3643] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3644] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3643] <... futex resumed>)        = 0
[pid  3643] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3644] <... openat resumed>)       = 3
[pid  3644] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3643] <... futex resumed>)        = 0
[pid  3644] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3643] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3644] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3643] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3644] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3644] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3643] <... futex resumed>)        = 0
[pid  3644] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3643] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3644] <... socket resumed>)       = 5
[pid  3643] <... futex resumed>)        = 0
[pid  3644] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3643] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3644] <... futex resumed>)        = 0
[pid  3643] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3643] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3643] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[   59.581923][ T3620] block nbd0: Receive control failed (result -107)
[   59.582036][ T3620] block nbd0: Receive control failed (result -32)
[   59.586615][ T3621] block nbd0: shutting down sockets
[pid  3644] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3644] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3643] <... futex resumed>)        = 0
[pid  3644] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3643] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3644] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3643] <... futex resumed>)        = 0
[pid  3644] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3643] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3644] <... ioctl resumed>)        = 0
[pid  3644] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3644] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3643] <... futex resumed>)        = 0
[pid  3643] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3644] <... futex resumed>)        = 0
[pid  3643] <... futex resumed>)        = 1
[pid  3644] 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3643] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3644] <... ioctl resumed>)        = 0
[pid  3644] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3643] <... futex resumed>)        = 0
[pid  3644] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3643] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3644] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3643] <... futex resumed>)        = 0
[pid  3644] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3643] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3644] <... openat resumed>)       = 6
[pid  3644] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3643] <... futex resumed>)        = 0
[pid  3644] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3643] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3644] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3643] <... futex resumed>)        = 0
[pid  3644] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3643] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3644] <... openat resumed>)       = 7
[pid  3644] write(7, "5", 1)            = 1
[pid  3644] ioctl(6, NBD_DO_IT)         = 0
[pid  3644] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3643] <... futex resumed>)        = 0
[pid  3644] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3643] exit_group(0 <unfinished ...>
[pid  3644] <... futex resumed>)        = ?
[pid  3643] <... exit_group resumed>)   = ?
[pid  3644] +++ exited with 0 +++
[pid  3643] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3643, 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=0x5555571d45d0) = 3645
./strace-static-x86_64: Process 3645 attached
[pid  3645] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3645] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3645] setpgid(0, 0)               = 0
[pid  3645] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3645] write(3, "1000", 4)         = 4
[pid  3645] close(3)                    = 0
[pid  3645] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3645] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3645] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3645] clone(child_stack=0x7fdef6e223f0, 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 3646 attached
 <unfinished ...>
[pid  3646] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3646] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3645] <... clone resumed>, parent_tid=[3646], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3646
[pid  3645] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3646] <... futex resumed>)        = 0
[pid  3645] <... futex resumed>)        = 1
[pid  3645] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3646] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[   59.710917][ T3620] block nbd0: Receive control failed (result -107)
[   59.710994][ T3620] block nbd0: Receive control failed (result -32)
[   59.715907][ T3621] block nbd0: shutting down sockets
[pid  3646] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3646] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3645] <... futex resumed>)        = 0
[pid  3645] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3646] <... futex resumed>)        = 0
[pid  3645] <... futex resumed>)        = 1
[pid  3646] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3645] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3646] <... openat resumed>)       = 4
[pid  3646] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3645] <... futex resumed>)        = 0
[pid  3646] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3645] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3646] <... socket resumed>)       = 5
[pid  3645] <... futex resumed>)        = 0
[pid  3646] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3645] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3646] <... futex resumed>)        = 0
[pid  3645] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3646] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3645] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3645] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3646] <... ioctl resumed>)        = 0
[pid  3646] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3645] <... futex resumed>)        = 0
[pid  3646] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3645] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3646] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3645] <... futex resumed>)        = 0
[pid  3646] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3645] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3646] <... ioctl resumed>)        = 0
[pid  3646] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3645] <... futex resumed>)        = 0
[pid  3646] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3645] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3646] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3645] <... futex resumed>)        = 0
[pid  3646] 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3645] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3646] <... ioctl resumed>)        = 0
[pid  3646] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3645] <... futex resumed>)        = 0
[pid  3646] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3645] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3646] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3645] <... futex resumed>)        = 0
[pid  3646] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3645] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3646] <... openat resumed>)       = 6
[pid  3646] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3645] <... futex resumed>)        = 0
[pid  3646] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3645] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3646] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3645] <... futex resumed>)        = 0
[pid  3646] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3645] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3646] <... openat resumed>)       = 7
[pid  3646] write(7, "5", 1)            = 1
[pid  3646] ioctl(6, NBD_DO_IT)         = 0
[pid  3646] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3645] <... futex resumed>)        = 0
[pid  3646] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3645] exit_group(0 <unfinished ...>
[pid  3646] <... futex resumed>)        = ?
[pid  3645] <... exit_group resumed>)   = ?
[pid  3646] +++ exited with 0 +++
[pid  3645] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3645, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3647
./strace-static-x86_64: Process 3647 attached
[pid  3647] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3647] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3647] setpgid(0, 0)               = 0
[pid  3647] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3647] write(3, "1000", 4)         = 4
[pid  3647] close(3)                    = 0
[pid  3647] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3647] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3647] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3647] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3648], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3648
[pid  3647] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3647] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3648 attached
 <unfinished ...>
[pid  3648] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3648] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3648] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3647] <... futex resumed>)        = 0
[pid  3647] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3647] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3648] <... futex resumed>)        = 1
[pid  3648] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3648] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3647] <... futex resumed>)        = 0
[pid  3647] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3647] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3648] <... futex resumed>)        = 1
[pid  3648] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3648] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3647] <... futex resumed>)        = 0
[pid  3647] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3647] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3648] <... futex resumed>)        = 1
[   59.869587][   T48] block nbd0: Receive control failed (result -107)
[   59.869664][   T48] block nbd0: Receive control failed (result -32)
[   59.874760][ T3621] block nbd0: shutting down sockets
[pid  3648] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3647] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3647] futex(0x7fdef6ef94fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3647] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6de1000
[pid  3647] mprotect(0x7fdef6de2000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3647] clone(child_stack=0x7fdef6e013f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3649], tls=0x7fdef6e01700, child_tidptr=0x7fdef6e019d0) = 3649
[pid  3647] futex(0x7fdef6ef94f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3647] futex(0x7fdef6ef94fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3649 attached
 <unfinished ...>
[pid  3649] set_robust_list(0x7fdef6e019e0, 24) = 0
[pid  3649] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3648] <... ioctl resumed>)        = 0
[pid  3648] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3648] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3649] <... ioctl resumed>)        = -1 EBUSY (Device or resource busy)
[pid  3649] futex(0x7fdef6ef94fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3647] <... futex resumed>)        = 0
[pid  3649] futex(0x7fdef6ef94f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3647] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3648] <... futex resumed>)        = 0
[pid  3647] <... futex resumed>)        = 1
[pid  3648] 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3647] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3648] <... ioctl resumed>)        = 0
[pid  3648] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3647] <... futex resumed>)        = 0
[pid  3648] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3647] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3648] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3647] <... futex resumed>)        = 0
[pid  3648] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3647] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3648] <... openat resumed>)       = 6
[pid  3648] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3647] <... futex resumed>)        = 0
[pid  3648] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3647] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3648] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3647] <... futex resumed>)        = 0
[pid  3648] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3647] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3648] <... openat resumed>)       = 7
[pid  3648] write(7, "5", 1)            = 1
[pid  3648] ioctl(6, NBD_DO_IT)         = 0
[pid  3648] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3647] <... futex resumed>)        = 0
[pid  3648] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3647] exit_group(0 <unfinished ...>
[pid  3649] <... futex resumed>)        = ?
[pid  3648] <... futex resumed>)        = ?
[pid  3647] <... exit_group resumed>)   = ?
[pid  3649] +++ exited with 0 +++
[pid  3648] +++ exited with 0 +++
[pid  3647] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3647, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
[   60.023478][ T3649] block nbd0: Device being setup by another task
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3650 attached
 <unfinished ...>
[pid  3650] set_robust_list(0x5555571d45e0, 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  3617] <... clone resumed>, child_tidptr=0x5555571d45d0) = 3650
[pid  3650] write(3, "1000", 4)         = 4
[pid  3650] close(3)                    = 0
[pid  3650] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3650] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3650] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3650] clone(child_stack=0x7fdef6e223f0, 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=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3651
[pid  3650] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3650] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3651] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3651] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3650] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3651] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3651] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3651] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
[pid  3650] <... futex resumed>)        = 1
[pid  3651] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3650] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3650] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3651] <... futex resumed>)        = 0
[pid  3650] <... futex resumed>)        = 1
[pid  3651] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3650] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... socket resumed>)       = 5
[pid  3651] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3650] futex(0x7fdef6ef94e8, 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 ...>
[   60.068666][ T3620] block nbd0: Receive control failed (result -107)
[   60.073844][ T3621] block nbd0: shutting down sockets
[pid  3650] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... ioctl resumed>)        = 0
[pid  3651] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3650] <... futex resumed>)        = 0
[pid  3651] <... futex resumed>)        = 1
[pid  3650] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3650] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3651] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3650] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3651] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3650] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... ioctl resumed>)        = 0
[pid  3651] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3650] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... openat resumed>)       = 6
[pid  3651] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3650] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3651] <... openat resumed>)       = 7
[pid  3651] write(7, "5", 1)            = 1
[pid  3651] ioctl(6, NBD_DO_IT)         = 0
[pid  3651] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3650] <... futex resumed>)        = 0
[pid  3651] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3650] exit_group(0 <unfinished ...>
[pid  3651] <... futex resumed>)        = ?
[pid  3650] <... exit_group resumed>)   = ?
[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=2} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3652 attached
, child_tidptr=0x5555571d45d0) = 3652
[pid  3652] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3652] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3652] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3652] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3653], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3653
[pid  3652] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3652] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3653 attached
 <unfinished ...>
[pid  3653] set_robust_list(0x7fdef6e229e0, 24) = 0
[   60.247981][ T3620] block nbd0: Receive control failed (result -107)
[   60.248058][ T3620] block nbd0: Receive control failed (result -32)
[   60.251000][ T3651] block nbd0: shutting down sockets
[pid  3653] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3653] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3653] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3652] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3653] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3652] <... futex resumed>)        = 0
[pid  3653] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3652] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] <... openat resumed>)       = 4
[pid  3653] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3652] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3652] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3653] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3652] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3652] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3653] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3653] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3652] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3652] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] <... ioctl resumed>)        = 0
[pid  3653] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3653] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3652] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3653] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3652] <... futex resumed>)        = 0
[pid  3653] <... ioctl resumed>)        = 0
[pid  3652] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3652] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3653] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3652] <... futex resumed>)        = 0
[pid  3653] <... openat resumed>)       = 6
[pid  3652] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3653] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3652] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3653] <... openat resumed>)       = 7
[pid  3653] write(7, "5", 1)            = 1
[pid  3653] ioctl(6, NBD_DO_IT)         = 0
[pid  3653] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3652] <... futex resumed>)        = 0
[pid  3653] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3652] exit_group(0 <unfinished ...>
[pid  3653] <... futex resumed>)        = ?
[pid  3652] <... exit_group resumed>)   = ?
[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=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 3654 attached
, child_tidptr=0x5555571d45d0) = 3654
[pid  3654] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3654] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3654] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3654] clone(child_stack=0x7fdef6e223f0, 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
 <unfinished ...>
[pid  3655] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3655] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] <... clone resumed>, parent_tid=[3655], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3655
[pid  3654] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3655] <... futex resumed>)        = 0
[pid  3654] <... futex resumed>)        = 1
[pid  3655] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3654] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... openat resumed>)       = 3
[pid  3655] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3655] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] <... futex resumed>)        = 0
[pid  3654] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3655] <... futex resumed>)        = 0
[pid  3655] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3655] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3655] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3654] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3655] <... futex resumed>)        = 0
[pid  3654] <... futex resumed>)        = 1
[pid  3655] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3655] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3654] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3654] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3655] <... futex resumed>)        = 0
[pid  3654] <... futex resumed>)        = 0
[pid  3654] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[   60.432214][   T48] block nbd0: Receive control failed (result -107)
[   60.432290][   T48] block nbd0: Receive control failed (result -32)
[   60.449229][ T3652] block nbd0: shutting down sockets
[pid  3655] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3655] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3654] <... futex resumed>)        = 0
[pid  3655] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... ioctl resumed>)        = 0
[pid  3655] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3654] <... futex resumed>)        = 0
[pid  3655] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3655] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3654] <... futex resumed>)        = 0
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3654] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... ioctl resumed>)        = 0
[pid  3655] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3654] <... futex resumed>)        = 0
[pid  3655] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... openat resumed>)       = 6
[pid  3655] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3654] <... futex resumed>)        = 0
[pid  3655] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3655] <... openat resumed>)       = 7
[pid  3655] write(7, "5", 1)            = 1
[pid  3655] ioctl(6, NBD_DO_IT)         = 0
[pid  3655] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3654] <... futex resumed>)        = 0
[pid  3655] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3654] exit_group(0 <unfinished ...>
[pid  3655] <... futex resumed>)        = ?
[pid  3654] <... exit_group resumed>)   = ?
[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=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3656
./strace-static-x86_64: Process 3656 attached
[pid  3656] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3656] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3656] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3656] clone(child_stack=0x7fdef6e223f0, 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=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3657
[pid  3656] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3656] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3657 attached
 <unfinished ...>
[pid  3657] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3657] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[   60.579869][ T3620] block nbd0: Receive control failed (result -107)
[   60.579950][ T3620] block nbd0: Receive control failed (result -32)
[   60.599341][ T3621] block nbd0: shutting down sockets
[pid  3657] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3656] <... futex resumed>)        = 0
[pid  3656] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3656] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3657] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3656] <... futex resumed>)        = 0
[pid  3657] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3656] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3657] <... socket resumed>)       = 5
[pid  3656] <... futex resumed>)        = 0
[pid  3657] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3656] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... futex resumed>)        = 0
[pid  3656] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3657] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3656] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... ioctl resumed>)        = 0
[pid  3657] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3656] <... futex resumed>)        = 0
[pid  3657] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3656] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... ioctl resumed>)        = 0
[pid  3657] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3656] <... futex resumed>)        = 0
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3656] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3657] <... ioctl resumed>)        = 0
[pid  3656] <... futex resumed>)        = 0
[pid  3657] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3656] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] <... futex resumed>)        = 0
[pid  3656] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3657] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3656] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3657] <... openat resumed>)       = 6
[pid  3656] <... futex resumed>)        = 0
[pid  3656] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3656] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3657] <... futex resumed>)        = 0
[pid  3656] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3657] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3656] <... futex resumed>)        = 0
[pid  3657] <... openat resumed>)       = 7
[pid  3656] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3657] write(7, "5", 1)            = 1
[pid  3657] ioctl(6, NBD_DO_IT)         = 0
[pid  3657] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3656] <... futex resumed>)        = 0
[pid  3657] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3656] exit_group(0 <unfinished ...>
[pid  3657] <... futex resumed>)        = ?
[pid  3656] <... exit_group resumed>)   = ?
[   60.732211][   T48] block nbd0: Receive control failed (result -107)
[   60.732287][   T48] block nbd0: Receive control failed (result -32)
[   60.749658][ T3657] block nbd0: shutting down sockets
[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=1} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3658
./strace-static-x86_64: Process 3658 attached
[pid  3658] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3658] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3658] clone(child_stack=0x7fdef6e223f0, 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
 <unfinished ...>
[pid  3659] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3659] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3658] <... clone resumed>, parent_tid=[3659], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3659
[pid  3658] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... futex resumed>)        = 0
[pid  3658] <... futex resumed>)        = 1
[pid  3659] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3659] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3659] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3658] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3658] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... futex resumed>)        = 0
[pid  3658] <... futex resumed>)        = 1
[pid  3659] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3659] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3659] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3658] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3658] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... futex resumed>)        = 0
[pid  3658] <... futex resumed>)        = 1
[pid  3659] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3659] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3659] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3658] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3658] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... futex resumed>)        = 0
[pid  3658] <... futex resumed>)        = 1
[pid  3659] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3658] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3659] <... ioctl resumed>)        = 0
[pid  3659] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3658] <... futex resumed>)        = 0
[pid  3659] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3658] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3658] <... futex resumed>)        = 0
[pid  3658] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out)
[pid  3658] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out)
[pid  3658] futex(0x7fdef6ef94fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6de1000
[pid  3658] mprotect(0x7fdef6de2000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3658] clone(child_stack=0x7fdef6e013f0, 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 3660 attached
 <unfinished ...>
[pid  3660] set_robust_list(0x7fdef6e019e0, 24) = 0
[pid  3660] futex(0x7fdef6ef94f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3658] <... clone resumed>, parent_tid=[3660], tls=0x7fdef6e01700, child_tidptr=0x7fdef6e019d0) = 3660
[pid  3658] futex(0x7fdef6ef94f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3658] futex(0x7fdef6ef94fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3660] <... futex resumed>)        = 0
[pid  3660] 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3659] <... ioctl resumed>)        = 0
[pid  3660] <... ioctl resumed>)        = 0
[pid  3659] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3659] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3660] futex(0x7fdef6ef94fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3658] <... futex resumed>)        = 0
[pid  3658] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... futex resumed>)        = 0
[pid  3659] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 6
[pid  3658] <... futex resumed>)        = 1
[pid  3659] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3658] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3659] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3658] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3658] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3659] <... futex resumed>)        = 0
[pid  3658] <... futex resumed>)        = 1
[pid  3659] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 7
[pid  3658] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3660] <... futex resumed>)        = 1
[pid  3659] write(7, "5", 1)            = 1
[pid  3660] futex(0x7fdef6ef94f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3659] ioctl(6, NBD_DO_IT)         = 0
[pid  3659] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3659] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3658] <... futex resumed>)        = 0
[pid  3658] exit_group(0 <unfinished ...>
[pid  3659] <... futex resumed>)        = ?
[pid  3658] <... exit_group resumed>)   = ?
[pid  3659] +++ exited with 0 +++
[pid  3660] <... futex resumed>)        = ?
[pid  3660] +++ 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} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3661
./strace-static-x86_64: Process 3661 attached
[pid  3661] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3661] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3661] setpgid(0, 0)               = 0
[pid  3661] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3661] write(3, "1000", 4)         = 4
[pid  3661] close(3)                    = 0
[pid  3661] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3661] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3661] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3661] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3662], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3662
[pid  3661] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3661] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3662 attached
 <unfinished ...>
[pid  3662] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3662] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3662] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3661] <... futex resumed>)        = 0
[pid  3661] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3661] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3662] <... futex resumed>)        = 1
[pid  3662] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3662] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3661] <... futex resumed>)        = 0
[pid  3661] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3661] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3662] <... futex resumed>)        = 1
[pid  3662] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3662] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3661] <... futex resumed>)        = 0
[pid  3661] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3661] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3662] <... futex resumed>)        = 1
[   60.920177][ T3620] block nbd0: Receive control failed (result -107)
[   60.920253][ T3620] block nbd0: Receive control failed (result -32)
[   60.929719][ T3660] block nbd0: shutting down sockets
[pid  3662] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3662] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3661] <... futex resumed>)        = 0
[pid  3661] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3662] <... futex resumed>)        = 1
[pid  3661] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3662] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3662] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3661] <... futex resumed>)        = 0
[pid  3662] 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3661] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3662] <... ioctl resumed>)        = 0
[pid  3661] <... futex resumed>)        = 0
[pid  3661] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3662] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3661] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3662] <... futex resumed>)        = 0
[pid  3661] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3662] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3661] <... futex resumed>)        = 0
[pid  3661] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3662] <... openat resumed>)       = 6
[pid  3662] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3661] <... futex resumed>)        = 0
[pid  3661] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3661] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3662] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 7
[pid  3662] write(7, "5", 1)            = 1
[pid  3662] ioctl(6, NBD_DO_IT)         = 0
[pid  3662] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3661] <... futex resumed>)        = 0
[pid  3662] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3661] exit_group(0 <unfinished ...>
[pid  3662] <... futex resumed>)        = ?
[pid  3661] <... exit_group resumed>)   = ?
[pid  3662] +++ exited with 0 +++
[pid  3661] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3661, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3663
./strace-static-x86_64: Process 3663 attached
[pid  3663] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3663] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3663] setpgid(0, 0)               = 0
[pid  3663] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3663] write(3, "1000", 4)         = 4
[pid  3663] close(3)                    = 0
[pid  3663] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3663] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3663] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3663] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3664], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3664
[pid  3663] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3663] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3664 attached
 <unfinished ...>
[pid  3664] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3664] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3664] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3663] <... futex resumed>)        = 0
[pid  3664] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3663] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3664] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3663] <... futex resumed>)        = 0
[pid  3663] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3664] <... openat resumed>)       = 4
[pid  3664] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3663] <... futex resumed>)        = 0
[pid  3664] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3663] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3664] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3663] <... futex resumed>)        = 0
[pid  3664] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3663] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3664] <... socket resumed>)       = 5
[pid  3664] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3663] <... futex resumed>)        = 0
[pid  3664] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3663] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3664] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3663] <... futex resumed>)        = 0
[pid  3664] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[   61.064570][   T48] block nbd0: Receive control failed (result -107)
[   61.064686][   T48] block nbd0: Receive control failed (result -32)
[   61.068825][ T3621] block nbd0: shutting down sockets
[pid  3663] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3664] <... ioctl resumed>)        = 0
[pid  3664] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3663] <... futex resumed>)        = 0
[pid  3664] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3663] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3664] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3663] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3664] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3664] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3663] <... futex resumed>)        = 0
[pid  3663] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3663] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3664] 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|NBD_FLAG_SEND_CACHE) = 0
[pid  3664] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3663] <... futex resumed>)        = 0
[pid  3663] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3663] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3664] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 6
[pid  3664] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3663] <... futex resumed>)        = 0
[pid  3664] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3663] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3664] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3663] <... futex resumed>)        = 0
[pid  3664] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3663] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3664] <... openat resumed>)       = 7
[pid  3664] write(7, "5", 1)            = 1
[pid  3664] ioctl(6, NBD_DO_IT)         = 0
[pid  3664] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3664] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3663] <... futex resumed>)        = 0
[pid  3663] exit_group(0 <unfinished ...>
[pid  3664] <... futex resumed>)        = ?
[pid  3663] <... exit_group resumed>)   = ?
[pid  3664] +++ exited with 0 +++
[pid  3663] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3663, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3665
./strace-static-x86_64: Process 3665 attached
[pid  3665] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3665] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3665] setpgid(0, 0)               = 0
[pid  3665] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3665] write(3, "1000", 4)         = 4
[pid  3665] close(3)                    = 0
[pid  3665] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3665] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3665] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3665] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3666], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3666
[pid  3665] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3665] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3666 attached
 <unfinished ...>
[pid  3666] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3666] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3666] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3665] <... futex resumed>)        = 0
[pid  3665] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3665] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3666] <... futex resumed>)        = 1
[pid  3666] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3666] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3665] <... futex resumed>)        = 0
[pid  3665] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3665] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3666] <... futex resumed>)        = 1
[pid  3666] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3666] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3665] <... futex resumed>)        = 0
[pid  3665] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3665] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3666] <... futex resumed>)        = 1
[pid  3666] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3666] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3665] <... futex resumed>)        = 0
[pid  3666] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3665] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3666] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3665] <... futex resumed>)        = 0
[pid  3666] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[   61.192549][   T48] block nbd0: Receive control failed (result -107)
[   61.192629][   T48] block nbd0: Receive control failed (result -32)
[   61.207816][ T3663] block nbd0: shutting down sockets
[pid  3665] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3666] <... ioctl resumed>)        = 0
[pid  3666] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3665] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3666] <... futex resumed>)        = 0
[pid  3665] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3666] 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3665] <... futex resumed>)        = 0
[pid  3666] <... ioctl resumed>)        = 0
[pid  3665] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3666] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3665] <... futex resumed>)        = 0
[pid  3666] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3665] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3666] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3665] <... futex resumed>)        = 0
[pid  3666] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3665] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3666] <... openat resumed>)       = 6
[pid  3666] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3665] <... futex resumed>)        = 0
[pid  3666] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3665] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3666] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3665] <... futex resumed>)        = 0
[pid  3666] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3665] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3666] <... openat resumed>)       = 7
[pid  3666] write(7, "5", 1)            = 1
[pid  3666] ioctl(6, NBD_DO_IT)         = 0
[pid  3666] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3665] <... futex resumed>)        = 0
[pid  3666] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3665] exit_group(0 <unfinished ...>
[pid  3666] <... futex resumed>)        = ?
[pid  3665] <... exit_group resumed>)   = ?
[pid  3666] +++ exited with 0 +++
[pid  3665] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3665, 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=0x5555571d45d0) = 3667
./strace-static-x86_64: Process 3667 attached
[pid  3667] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3667] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3667] setpgid(0, 0)               = 0
[pid  3667] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3667] write(3, "1000", 4)         = 4
[pid  3667] close(3)                    = 0
[pid  3667] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3667] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3667] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3667] clone(child_stack=0x7fdef6e223f0, 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 3668 attached
, parent_tid=[3668], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3668
[pid  3668] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3668] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3667] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3667] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3668] <... futex resumed>)        = 0
[pid  3668] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3668] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3667] <... futex resumed>)        = 0
[pid  3667] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3667] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3668] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3668] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3667] <... futex resumed>)        = 0
[pid  3668] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3667] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3667] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3668] <... socket resumed>)       = 5
[pid  3668] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3667] <... futex resumed>)        = 0
[pid  3668] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3667] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[   61.322754][ T3620] block nbd0: Receive control failed (result -107)
[   61.322871][ T3620] block nbd0: Receive control failed (result -32)
[   61.339144][ T3665] block nbd0: shutting down sockets
[pid  3667] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3668] <... ioctl resumed>)        = 0
[pid  3668] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3667] <... futex resumed>)        = 0
[pid  3668] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3667] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3667] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3668] <... ioctl resumed>)        = 0
[pid  3668] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3667] <... futex resumed>)        = 0
[pid  3668] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3667] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3668] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3667] <... futex resumed>)        = 0
[pid  3668] 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3667] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3668] <... ioctl resumed>)        = 0
[pid  3668] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3667] <... futex resumed>)        = 0
[pid  3668] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3667] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3668] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3667] <... futex resumed>)        = 0
[pid  3668] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3667] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3668] <... openat resumed>)       = 6
[pid  3668] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3667] <... futex resumed>)        = 0
[pid  3668] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3667] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3668] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3667] <... futex resumed>)        = 0
[pid  3668] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3667] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3668] <... openat resumed>)       = 7
[pid  3668] write(7, "5", 1)            = 1
[pid  3668] ioctl(6, NBD_DO_IT)         = 0
[pid  3668] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3667] <... futex resumed>)        = 0
[pid  3668] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3667] exit_group(0 <unfinished ...>
[pid  3668] <... futex resumed>)        = ?
[pid  3667] <... exit_group resumed>)   = ?
[pid  3668] +++ exited with 0 +++
[pid  3667] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3667, 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=0x5555571d45d0) = 3669
./strace-static-x86_64: Process 3669 attached
[pid  3669] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3669] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3669] setpgid(0, 0)               = 0
[pid  3669] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3669] write(3, "1000", 4)         = 4
[pid  3669] close(3)                    = 0
[pid  3669] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3669] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3669] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3669] clone(child_stack=0x7fdef6e223f0, 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 3670 attached
, parent_tid=[3670], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3670
[pid  3670] set_robust_list(0x7fdef6e229e0, 24 <unfinished ...>
[pid  3669] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3669] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3670] <... set_robust_list resumed>) = 0
[pid  3670] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3670] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3669] <... futex resumed>)        = 0
[pid  3670] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3669] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3669] <... futex resumed>)        = 0
[pid  3670] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3669] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3670] <... openat resumed>)       = 4
[pid  3670] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3669] <... futex resumed>)        = 0
[pid  3670] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3669] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3669] <... futex resumed>)        = 0
[pid  3670] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3669] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3670] <... socket resumed>)       = 5
[pid  3670] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3669] <... futex resumed>)        = 0
[pid  3670] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3669] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3669] <... futex resumed>)        = 0
[pid  3670] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3669] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3670] <... ioctl resumed>)        = 0
[pid  3670] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3669] <... futex resumed>)        = 0
[pid  3670] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3669] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3669] <... futex resumed>)        = 0
[pid  3670] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[   61.450627][ T3668] debugfs: out of free dentries, can not create directory 'nbd0'
[   61.450976][ T3620] block nbd0: Receive control failed (result -107)
[   61.451056][ T3620] block nbd0: Receive control failed (result -32)
[   61.456541][ T3667] block nbd0: shutting down sockets
[pid  3669] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3670] <... ioctl resumed>)        = 0
[pid  3670] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3669] <... futex resumed>)        = 0
[pid  3670] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3669] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3669] <... futex resumed>)        = 0
[pid  3670] <... ioctl resumed>)        = 0
[pid  3669] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3670] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3669] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3670] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3669] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3669] <... futex resumed>)        = 0
[pid  3670] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 6
[pid  3669] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3670] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3669] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3670] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3669] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3670] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3670] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3669] <... futex resumed>)        = 0
[pid  3670] <... openat resumed>)       = 7
[pid  3669] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3670] write(7, "5", 1)            = 1
[pid  3670] ioctl(6, NBD_DO_IT)         = 0
[pid  3670] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3669] <... futex resumed>)        = 0
[pid  3670] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3669] exit_group(0 <unfinished ...>
[pid  3670] <... futex resumed>)        = ?
[pid  3669] <... exit_group resumed>)   = ?
[pid  3670] +++ exited with 0 +++
[pid  3669] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3669, 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=0x5555571d45d0) = 3671
./strace-static-x86_64: Process 3671 attached
[pid  3671] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3671] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3671] setpgid(0, 0)               = 0
[pid  3671] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3671] write(3, "1000", 4)         = 4
[pid  3671] close(3)                    = 0
[pid  3671] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3671] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3671] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3671] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3672], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3672
[pid  3671] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3671] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3672 attached
 <unfinished ...>
[pid  3672] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3672] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3672] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3671] <... futex resumed>)        = 0
[pid  3672] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3671] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3672] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3671] <... futex resumed>)        = 0
[pid  3672] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3672] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3672] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3671] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3671] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3672] <... futex resumed>)        = 0
[pid  3671] <... futex resumed>)        = 1
[pid  3672] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3671] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3672] <... socket resumed>)       = 5
[pid  3672] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3671] <... futex resumed>)        = 0
[pid  3672] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3671] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3671] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3672] <... ioctl resumed>)        = 0
[pid  3672] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3671] <... futex resumed>)        = 0
[pid  3672] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3671] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3672] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3671] <... futex resumed>)        = 0
[   61.581234][ T3670] debugfs: out of free dentries, can not create directory 'nbd0'
[   61.581404][   T48] block nbd0: Receive control failed (result -107)
[   61.581922][   T48] block nbd0: Receive control failed (result -32)
[   61.588899][ T3669] block nbd0: shutting down sockets
[pid  3672] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3671] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3672] <... ioctl resumed>)        = 0
[pid  3672] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3671] <... futex resumed>)        = 0
[pid  3672] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3671] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3672] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3671] <... futex resumed>)        = 0
[pid  3672] 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3671] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3672] <... ioctl resumed>)        = 0
[pid  3672] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3671] <... futex resumed>)        = 0
[pid  3672] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3671] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3672] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3671] <... futex resumed>)        = 0
[pid  3672] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3671] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3672] <... openat resumed>)       = 6
[pid  3672] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3671] <... futex resumed>)        = 0
[pid  3672] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3671] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3672] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3671] <... futex resumed>)        = 0
[pid  3672] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3671] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3672] <... openat resumed>)       = 7
[pid  3672] write(7, "5", 1)            = 1
[pid  3672] ioctl(6, NBD_DO_IT)         = 0
[pid  3672] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3671] <... futex resumed>)        = 0
[pid  3672] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3671] exit_group(0 <unfinished ...>
[pid  3672] <... futex resumed>)        = ?
[pid  3671] <... exit_group resumed>)   = ?
[pid  3672] +++ exited with 0 +++
[pid  3671] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3671, si_uid=0, si_status=0, si_utime=1, si_stime=1} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3673 attached
, child_tidptr=0x5555571d45d0) = 3673
[pid  3673] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3673] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3673] setpgid(0, 0)               = 0
[pid  3673] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3673] write(3, "1000", 4)         = 4
[pid  3673] close(3)                    = 0
[pid  3673] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3673] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3673] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3673] clone(child_stack=0x7fdef6e223f0, 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 3674 attached
 <unfinished ...>
[pid  3674] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3673] <... clone resumed>, parent_tid=[3674], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3674
[pid  3674] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3673] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3674] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3673] <... futex resumed>)        = 0
[pid  3673] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3674] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3674] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3673] <... futex resumed>)        = 0
[pid  3673] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3673] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3674] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3674] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3673] <... futex resumed>)        = 0
[pid  3674] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3673] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3674] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3673] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3674] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3674] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3673] <... futex resumed>)        = 0
[pid  3673] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3673] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[   61.708783][ T3672] debugfs: out of free dentries, can not create directory 'nbd0'
[   61.708900][   T48] block nbd0: Receive control failed (result -107)
[   61.709082][   T48] block nbd0: Receive control failed (result -32)
[   61.713018][ T3621] block nbd0: shutting down sockets
[pid  3674] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3674] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3673] <... futex resumed>)        = 0
[pid  3674] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3673] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3673] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out)
[pid  3673] futex(0x7fdef6ef94fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3673] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6de1000
[pid  3673] mprotect(0x7fdef6de2000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3673] clone(child_stack=0x7fdef6e013f0, 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=0x7fdef6e01700, child_tidptr=0x7fdef6e019d0) = 3675
./strace-static-x86_64: Process 3675 attached
[pid  3673] futex(0x7fdef6ef94f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3675] set_robust_list(0x7fdef6e019e0, 24 <unfinished ...>
[pid  3673] futex(0x7fdef6ef94fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3675] <... set_robust_list resumed>) = 0
[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|NBD_FLAG_SEND_CACHE) = 0
[pid  3674] <... ioctl resumed>)        = 0
[pid  3675] futex(0x7fdef6ef94fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3674] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3675] <... futex resumed>)        = 1
[pid  3674] <... futex resumed>)        = 0
[pid  3673] <... futex resumed>)        = 0
[pid  3674] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3673] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3674] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3673] <... futex resumed>)        = 0
[pid  3674] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3673] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3675] futex(0x7fdef6ef94f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3674] <... openat resumed>)       = 6
[pid  3674] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3673] <... futex resumed>)        = 0
[pid  3674] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3673] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3674] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3673] <... futex resumed>)        = 0
[pid  3674] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3673] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3674] <... openat resumed>)       = 7
[pid  3674] write(7, "5", 1)            = 1
[pid  3674] ioctl(6, NBD_DO_IT)         = 0
[pid  3674] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3673] <... futex resumed>)        = 0
[pid  3674] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3673] exit_group(0 <unfinished ...>
[pid  3675] <... futex resumed>)        = ?
[pid  3674] <... futex resumed>)        = ?
[pid  3673] <... exit_group resumed>)   = ?
[pid  3675] +++ exited with 0 +++
[pid  3674] +++ exited with 0 +++
[pid  3673] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3673, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3676
./strace-static-x86_64: Process 3676 attached
[pid  3676] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3676] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3676] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3676] clone(child_stack=0x7fdef6e223f0, 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 3677 attached
 <unfinished ...>
[pid  3677] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3677] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3676] <... clone resumed>, parent_tid=[3677], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3677
[pid  3676] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... futex resumed>)        = 0
[pid  3676] <... futex resumed>)        = 1
[pid  3677] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3676] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... openat resumed>)       = 3
[pid  3677] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3677] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3676] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3676] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... futex resumed>)        = 0
[pid  3676] <... futex resumed>)        = 1
[pid  3677] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3677] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3677] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[   61.868270][ T3674] debugfs: out of free dentries, can not create directory 'nbd0'
[   61.868365][   T48] block nbd0: Receive control failed (result -107)
[   61.868476][   T48] block nbd0: Receive control failed (result -32)
[   61.881651][ T3673] block nbd0: shutting down sockets
[pid  3676] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3676] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... futex resumed>)        = 0
[pid  3676] <... futex resumed>)        = 1
[pid  3677] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3677] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3677] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3676] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3676] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3677] <... futex resumed>)        = 0
[pid  3676] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3677] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3676] <... futex resumed>)        = 0
[pid  3677] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3676] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3676] <... futex resumed>)        = 0
[pid  3676] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... ioctl resumed>)        = 0
[pid  3677] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3677] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3676] <... futex resumed>)        = 0
[pid  3676] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... futex resumed>)        = 0
[pid  3676] <... futex resumed>)        = 1
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3676] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... ioctl resumed>)        = 0
[pid  3677] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3676] <... futex resumed>)        = 0
[pid  3677] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3676] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3676] <... futex resumed>)        = 0
[pid  3677] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3676] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... openat resumed>)       = 6
[pid  3677] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3676] <... futex resumed>)        = 0
[pid  3677] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3676] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3677] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3676] <... futex resumed>)        = 0
[pid  3677] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3676] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3677] <... openat resumed>)       = 7
[pid  3677] write(7, "5", 1)            = 1
[pid  3677] ioctl(6, NBD_DO_IT)         = 0
[pid  3677] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3676] <... futex resumed>)        = 0
[pid  3677] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3676] exit_group(0 <unfinished ...>
[pid  3677] <... futex resumed>)        = ?
[pid  3676] <... exit_group 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=0, si_stime=1} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3678 attached
, child_tidptr=0x5555571d45d0) = 3678
[pid  3678] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3678] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3678] clone(child_stack=0x7fdef6e223f0, 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 3679 attached
 <unfinished ...>
[pid  3679] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3678] <... clone resumed>, parent_tid=[3679], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3679
[pid  3678] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3679] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3679] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3678] <... futex resumed>)        = 0
[pid  3678] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3678] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] <... futex resumed>)        = 0
[pid  3679] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3679] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3678] <... futex resumed>)        = 0
[pid  3679] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3678] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3679] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3678] <... futex resumed>)        = 0
[pid  3679] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3678] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] <... socket resumed>)       = 5
[pid  3679] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3678] <... futex resumed>)        = 0
[pid  3679] <... futex resumed>)        = 1
[pid  3678] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3679] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3678] <... futex resumed>)        = 0
[   62.040759][ T3677] debugfs: out of free dentries, can not create directory 'nbd0'
[   62.040841][   T48] block nbd0: Receive control failed (result -107)
[   62.040956][   T48] block nbd0: Receive control failed (result -32)
[   62.045322][ T3621] block nbd0: shutting down sockets
[pid  3678] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] <... ioctl resumed>)        = 0
[pid  3679] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3678] <... futex resumed>)        = 0
[pid  3679] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3678] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] <... ioctl resumed>)        = 0
[pid  3679] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3678] <... futex resumed>)        = 0
[pid  3678] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[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|NBD_FLAG_SEND_CACHE) = 0
[pid  3679] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3678] <... futex resumed>)        = 0
[pid  3678] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 6
[pid  3679] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3678] <... futex resumed>)        = 0
[pid  3678] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3678] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3679] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 7
[pid  3679] write(7, "5", 1)            = 1
[pid  3679] ioctl(6, NBD_DO_IT)         = 0
[pid  3679] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3678] <... futex resumed>)        = 0
[pid  3679] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3678] exit_group(0 <unfinished ...>
[pid  3679] <... futex resumed>)        = ?
[pid  3678] <... exit_group 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=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3681 attached
, child_tidptr=0x5555571d45d0) = 3681
[pid  3681] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3681] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3681] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3681] clone(child_stack=0x7fdef6e223f0, 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=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3682
[pid  3681] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3681] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3682 attached
 <unfinished ...>
[pid  3682] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3682] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3682] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3681] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3682] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3682] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3681] <... futex resumed>)        = 0
[pid  3682] <... socket resumed>)       = 5
[pid  3681] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3682] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3681] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3682] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[   62.184362][ T3679] debugfs: out of free dentries, can not create directory 'nbd0'
[   62.184492][   T48] block nbd0: Receive control failed (result -107)
[   62.184568][   T48] block nbd0: Receive control failed (result -32)
[   62.190310][ T3679] block nbd0: shutting down sockets
[pid  3682] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3682] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3681] <... futex resumed>)        = 0
[pid  3682] <... futex resumed>)        = 1
[pid  3681] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3682] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3681] <... futex resumed>)        = 0
[pid  3681] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] <... ioctl resumed>)        = 0
[pid  3682] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3682] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3681] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3682] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3681] <... 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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3681] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] <... ioctl resumed>)        = 0
[pid  3682] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3682] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3681] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3682] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3681] <... futex resumed>)        = 0
[pid  3682] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3681] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] <... openat resumed>)       = 6
[pid  3682] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3682] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3681] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3682] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3681] <... futex resumed>)        = 0
[pid  3682] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3681] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3682] <... openat resumed>)       = 7
[pid  3682] write(7, "5", 1)            = 1
[pid  3682] ioctl(6, NBD_DO_IT)         = 0
[pid  3682] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3681] <... futex resumed>)        = 0
[pid  3682] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3681] exit_group(0 <unfinished ...>
[pid  3682] <... futex resumed>)        = ?
[pid  3681] <... exit_group resumed>)   = ?
[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=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3683
./strace-static-x86_64: Process 3683 attached
[pid  3683] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3683] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3683] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3683] clone(child_stack=0x7fdef6e223f0, 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=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3684
[pid  3683] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3683] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3684 attached
 <unfinished ...>
[pid  3684] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3684] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3684] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3683] <... futex resumed>)        = 0
[pid  3683] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3683] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... futex resumed>)        = 1
[pid  3684] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3684] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3683] <... futex resumed>)        = 0
[pid  3683] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3683] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... futex resumed>)        = 1
[pid  3684] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3684] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3683] <... futex resumed>)        = 0
[pid  3683] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3683] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... futex resumed>)        = 1
[   62.330813][ T3682] debugfs: out of free dentries, can not create directory 'nbd0'
[   62.330904][ T3680] block nbd0: Receive control failed (result -107)
[   62.331016][ T3680] block nbd0: Receive control failed (result -32)
[   62.350757][ T3681] block nbd0: shutting down sockets
[pid  3684] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3684] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3683] <... futex resumed>)        = 0
[pid  3684] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3683] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3684] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3683] <... futex resumed>)        = 0
[pid  3684] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3683] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... ioctl resumed>)        = 0
[pid  3684] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3683] <... futex resumed>)        = 0
[pid  3684] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3683] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3684] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3683] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... ioctl resumed>)        = 0
[pid  3684] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3683] <... futex resumed>)        = 0
[pid  3684] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3683] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3684] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3683] <... futex resumed>)        = 0
[pid  3684] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3683] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... openat resumed>)       = 6
[pid  3684] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3683] <... futex resumed>)        = 0
[pid  3684] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3683] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3684] <... openat resumed>)       = 7
[pid  3684] write(7, "5", 1)            = 1
[pid  3684] ioctl(6, NBD_DO_IT)         = 0
[pid  3684] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3683] <... futex resumed>)        = 0
[pid  3684] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3683] exit_group(0 <unfinished ...>
[pid  3684] <... futex resumed>)        = ?
[pid  3683] <... exit_group 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=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3685
./strace-static-x86_64: Process 3685 attached
[pid  3685] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3685] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3685] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3685] clone(child_stack=0x7fdef6e223f0, 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 3686 attached
, parent_tid=[3686], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3686
[pid  3685] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3685] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3686] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3686] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3685] <... futex resumed>)        = 0
[pid  3685] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3685] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3686] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3685] <... futex resumed>)        = 0
[pid  3685] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3686] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3685] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... socket resumed>)       = 5
[pid  3686] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3685] <... futex resumed>)        = 0
[pid  3686] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3685] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[   62.481571][ T3684] debugfs: out of free dentries, can not create directory 'nbd0'
[   62.481733][ T3680] block nbd0: Receive control failed (result -107)
[   62.481788][ T3620] block nbd0: Receive control failed (result -107)
[   62.488450][ T3683] block nbd0: shutting down sockets
[pid  3685] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... ioctl resumed>)        = 0
[pid  3686] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3685] <... futex resumed>)        = 0
[pid  3686] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3685] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... ioctl resumed>)        = 0
[pid  3686] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3685] <... futex resumed>)        = 0
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3685] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3686] <... ioctl resumed>)        = 0
[pid  3685] <... futex resumed>)        = 0
[pid  3686] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3685] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... futex resumed>)        = 0
[pid  3685] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3686] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3685] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... openat resumed>)       = 6
[pid  3686] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3685] <... futex resumed>)        = 0
[pid  3686] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3685] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3686] <... openat resumed>)       = 7
[pid  3686] write(7, "5", 1)            = 1
[pid  3686] ioctl(6, NBD_DO_IT)         = 0
[pid  3686] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3686] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3685] <... futex resumed>)        = 0
[pid  3685] exit_group(0 <unfinished ...>
[pid  3686] <... futex resumed>)        = ?
[pid  3685] <... exit_group resumed>)   = ?
[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=2} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3687 attached
, child_tidptr=0x5555571d45d0) = 3687
[pid  3687] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3687] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3687] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3687] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3688], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3688
./strace-static-x86_64: Process 3688 attached
[pid  3687] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3687] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3688] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3688] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3688] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3687] <... futex resumed>)        = 0
[pid  3687] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3687] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] <... futex resumed>)        = 0
[pid  3688] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3688] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3687] <... futex resumed>)        = 0
[pid  3687] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3687] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3688] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3687] <... futex resumed>)        = 0
[pid  3687] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3687] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[   62.631863][ T3686] debugfs: out of free dentries, can not create directory 'nbd0'
[   62.632012][ T3620] block nbd0: Receive control failed (result -107)
[   62.632016][ T3680] block nbd0: Receive control failed (result -107)
[   62.656556][ T3685] block nbd0: shutting down sockets
[pid  3688] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3688] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3687] <... futex resumed>)        = 0
[pid  3688] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3687] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3687] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] <... ioctl resumed>)        = 0
[pid  3688] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3687] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3688] <... ioctl resumed>)        = 0
[pid  3687] <... futex resumed>)        = 0
[pid  3688] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3687] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] <... futex resumed>)        = 0
[pid  3688] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3687] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3688] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3687] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3688] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3687] <... futex resumed>)        = 0
[pid  3688] <... openat resumed>)       = 6
[pid  3687] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3687] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3688] <... futex resumed>)        = 0
[pid  3687] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3688] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3687] <... futex resumed>)        = 0
[pid  3688] <... openat resumed>)       = 7
[pid  3687] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3688] write(7, "5", 1)            = 1
[pid  3688] ioctl(6, NBD_DO_IT)         = 0
[pid  3688] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3687] <... futex resumed>)        = 0
[pid  3688] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3687] exit_group(0 <unfinished ...>
[pid  3688] <... futex resumed>)        = ?
[pid  3687] <... exit_group resumed>)   = ?
[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=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3689
./strace-static-x86_64: Process 3689 attached
[pid  3689] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3689] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3689] clone(child_stack=0x7fdef6e223f0, 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=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3690
[pid  3689] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3690 attached
 <unfinished ...>
[pid  3690] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3690] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3690] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3689] <... futex resumed>)        = 0
[pid  3689] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] futex(0x7fdef6ef94ec, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3689] <... futex resumed>)        = 0
[pid  3689] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3690] <... futex resumed>)        = 1
[pid  3690] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3690] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3689] <... futex resumed>)        = 0
[pid  3689] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3689] futex(0x7fdef6ef94ec, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3689] <... futex resumed>)        = 0
[pid  3690] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3689] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[   62.771996][ T3688] debugfs: out of free dentries, can not create directory 'nbd0'
[   62.772134][ T3620] block nbd0: Receive control failed (result -107)
[   62.772139][ T3680] block nbd0: Receive control failed (result -107)
[   62.797641][ T3687] block nbd0: shutting down sockets
[pid  3689] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3690] <... ioctl resumed>)        = 0
[pid  3690] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3689] <... futex resumed>)        = 0
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3689] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3690] <... ioctl resumed>)        = 0
[pid  3689] <... futex resumed>)        = 0
[pid  3690] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3689] futex(0x7fdef6ef94ec, 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] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3689] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3690] <... openat resumed>)       = 6
[pid  3689] <... futex resumed>)        = 0
[pid  3690] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3689] futex(0x7fdef6ef94ec, 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  3689] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3690] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3689] <... futex resumed>)        = 0
[pid  3690] <... openat resumed>)       = 7
[pid  3689] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3690] write(7, "5", 1)            = 1
[pid  3690] ioctl(6, NBD_DO_IT)         = 0
[pid  3690] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3690] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3689] <... futex resumed>)        = 0
[pid  3689] exit_group(0 <unfinished ...>
[pid  3690] <... futex resumed>)        = ?
[pid  3689] <... exit_group resumed>)   = ?
[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=2} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3691
./strace-static-x86_64: Process 3691 attached
[pid  3691] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3691] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3691] clone(child_stack=0x7fdef6e223f0, 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=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3692
[pid  3691] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3692 attached
 <unfinished ...>
[pid  3692] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3692] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3692] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3691] <... futex resumed>)        = 0
[pid  3691] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] futex(0x7fdef6ef94ec, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3691] <... futex resumed>)        = 0
[pid  3691] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... futex resumed>)        = 1
[pid  3692] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3692] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3691] <... futex resumed>)        = 0
[pid  3691] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3691] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... futex resumed>)        = 1
[   62.889578][ T3690] debugfs: out of free dentries, can not create directory 'nbd0'
[   62.889724][ T3620] block nbd0: Receive control failed (result -107)
[   62.889728][ T3680] block nbd0: Receive control failed (result -107)
[   62.897436][ T3690] block nbd0: shutting down sockets
[pid  3692] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3692] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3691] <... futex resumed>)        = 0
[pid  3692] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3691] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... ioctl resumed>)        = 0
[pid  3692] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3691] <... futex resumed>)        = 0
[pid  3692] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3691] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3692] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3691] <... futex resumed>)        = 0
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3691] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... ioctl resumed>)        = 0
[pid  3692] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3691] <... futex resumed>)        = 0
[pid  3692] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3691] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3692] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3691] <... futex resumed>)        = 0
[pid  3692] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3691] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... openat resumed>)       = 6
[pid  3692] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3691] <... futex resumed>)        = 0
[pid  3692] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3691] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3692] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3691] <... futex resumed>)        = 0
[pid  3692] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3691] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3692] <... openat resumed>)       = 7
[pid  3692] write(7, "5", 1)            = 1
[pid  3692] ioctl(6, NBD_DO_IT)         = 0
[pid  3692] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3691] <... futex resumed>)        = 0
[pid  3692] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3691] exit_group(0 <unfinished ...>
[pid  3692] <... futex resumed>)        = ?
[pid  3691] <... exit_group resumed>)   = ?
[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=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555571d45d0) = 3693
./strace-static-x86_64: Process 3693 attached
[pid  3693] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3693] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3693] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3693] clone(child_stack=0x7fdef6e223f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3694], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3694
[pid  3693] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3693] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3694 attached
 <unfinished ...>
[pid  3694] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3694] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3694] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3694] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3693] <... futex resumed>)        = 0
[pid  3693] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3694] <... futex resumed>)        = 0
[pid  3694] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3694] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3694] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3693] <... futex resumed>)        = 1
[pid  3693] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3693] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3694] <... futex resumed>)        = 0
[pid  3693] <... futex resumed>)        = 1
[pid  3694] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3693] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3693] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3694] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3693] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3694] <... futex resumed>)        = 0
[pid  3693] <... futex resumed>)        = 1
[pid  3694] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[   63.049006][ T3692] debugfs: out of free dentries, can not create directory 'nbd0'
[   63.049121][ T3680] block nbd0: Receive control failed (result -107)
[   63.049327][ T3680] block nbd0: Receive control failed (result -32)
[   63.054254][ T3621] block nbd0: shutting down sockets
[pid  3693] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... ioctl resumed>)        = 0
[pid  3694] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3693] <... futex resumed>)        = 0
[pid  3694] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3693] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... ioctl resumed>)        = 0
[pid  3694] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3693] <... futex resumed>)        = 0
[pid  3694] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3693] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3694] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[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|NBD_FLAG_SEND_CACHE) = 0
[pid  3693] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3693] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3694] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3693] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... openat resumed>)       = 6
[pid  3694] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3693] <... futex resumed>)        = 0
[pid  3694] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3693] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3694] <... openat resumed>)       = 7
[pid  3694] write(7, "5", 1)            = 1
[pid  3694] ioctl(6, NBD_DO_IT)         = 0
[pid  3694] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3693] <... futex resumed>)        = 0
[pid  3694] <... futex resumed>)        = 1
[pid  3693] exit_group(0)               = ?
[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=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3695 attached
, child_tidptr=0x5555571d45d0) = 3695
[pid  3695] set_robust_list(0x5555571d45e0, 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(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3695] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3695] clone(child_stack=0x7fdef6e223f0, 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=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3696
[pid  3695] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3696 attached
 <unfinished ...>
[pid  3696] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3696] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3
[pid  3696] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3695] <... futex resumed>)        = 0
[pid  3695] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] <... futex resumed>)        = 1
[pid  3696] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3696] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3695] <... futex resumed>)        = 0
[pid  3695] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] <... futex resumed>)        = 1
[pid  3696] socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
[pid  3696] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3695] <... futex resumed>)        = 0
[pid  3695] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] <... futex resumed>)        = 1
[   63.204505][ T3694] debugfs: out of free dentries, can not create directory 'nbd0'
[   63.204633][ T3680] block nbd0: Receive control failed (result -107)
[   63.204637][ T3620] block nbd0: Receive control failed (result -107)
[   63.209942][ T3693] block nbd0: shutting down sockets
[pid  3696] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3695] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3695] futex(0x7fdef6ef94fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6de1000
[pid  3695] mprotect(0x7fdef6de2000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3695] clone(child_stack=0x7fdef6e013f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[3697], tls=0x7fdef6e01700, child_tidptr=0x7fdef6e019d0) = 3697
[pid  3695] futex(0x7fdef6ef94f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3695] futex(0x7fdef6ef94fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 3697 attached
 <unfinished ...>
[pid  3697] set_robust_list(0x7fdef6e019e0, 24) = 0
[pid  3697] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3696] <... ioctl resumed>)        = 0
[pid  3696] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3696] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3697] <... ioctl resumed>)        = -1 EBUSY (Device or resource busy)
[pid  3697] futex(0x7fdef6ef94fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] <... futex resumed>)        = 0
[pid  3697] futex(0x7fdef6ef94f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3695] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3696] <... futex resumed>)        = 0
[pid  3695] <... futex resumed>)        = 1
[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|NBD_FLAG_SEND_CACHE <unfinished ...>
[pid  3695] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] <... ioctl resumed>)        = 0
[pid  3696] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] <... futex resumed>)        = 0
[pid  3696] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3695] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] <... openat resumed>)       = 6
[pid  3696] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3695] <... futex resumed>)        = 0
[pid  3696] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3695] futex(0x7fdef6ef94e8, 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(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3696] <... openat resumed>)       = 7
[pid  3696] write(7, "5", 1)            = 1
[pid  3696] ioctl(6, NBD_DO_IT <unfinished ...>
[pid  3695] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[pid  3696] <... ioctl resumed>)        = 0
[pid  3696] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3696] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[   63.343438][ T3697] block nbd0: Device being setup by another task
[pid  3695] exit_group(0 <unfinished ...>
[pid  3697] <... futex resumed>)        = ?
[pid  3695] <... exit_group resumed>)   = ?
[pid  3697] +++ exited with 0 +++
[pid  3696] <... futex resumed>)        = ?
[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} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3698 attached
, child_tidptr=0x5555571d45d0) = 3698
[pid  3698] set_robust_list(0x5555571d45e0, 24) = 0
[pid  3698] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3698] setpgid(0, 0)               = 0
[pid  3698] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  3698] write(3, "1000", 4)         = 4
[pid  3698] close(3)                    = 0
[pid  3698] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3698] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdef6e02000
[pid  3698] mprotect(0x7fdef6e03000, 131072, PROT_READ|PROT_WRITE) = 0
[pid  3698] clone(child_stack=0x7fdef6e223f0, 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 3699 attached
, parent_tid=[3699], tls=0x7fdef6e22700, child_tidptr=0x7fdef6e229d0) = 3699
[pid  3699] set_robust_list(0x7fdef6e229e0, 24) = 0
[pid  3699] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3698] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3699] <... futex resumed>)        = 0
[pid  3699] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY <unfinished ...>
[pid  3698] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3699] <... openat resumed>)       = 3
[pid  3699] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3699] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3698] <... futex resumed>)        = 0
[pid  3698] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3699] <... futex resumed>)        = 0
[pid  3699] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4
[pid  3698] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3699] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3698] <... futex resumed>)        = 0
[pid  3699] socket(AF_INET, SOCK_STREAM, IPPROTO_IP <unfinished ...>
[pid  3698] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3698] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3699] <... socket resumed>)       = 5
[pid  3699] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3698] <... futex resumed>)        = 0
[pid  3698] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3698] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[   63.406845][ T3696] kobject_add_internal failed for 0 (error: -12 parent: mq)
[   63.408505][ T3620] block nbd0: Receive control failed (result -107)
[   63.429609][ T3696] block nbd0: shutting down sockets
[pid  3699] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3699] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3698] <... futex resumed>)        = 0
[pid  3699] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3698] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3699] ioctl(4, NBD_SET_SOCK, 5 <unfinished ...>
[pid  3698] <... futex resumed>)        = 0
[pid  3698] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3699] <... ioctl resumed>)        = 0
[pid  3699] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid  3699] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3698] <... futex resumed>)        = 0
[pid  3698] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3699] <... futex resumed>)        = 0
[pid  3698] <... futex resumed>)        = 1
[pid  3699] 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|NBD_FLAG_SEND_CACHE) = 0
[pid  3699] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3699] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid  3698] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3698] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3699] <... futex resumed>)        = 0
[pid  3698] <... futex resumed>)        = 1
[pid  3699] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 6
[pid  3698] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3699] futex(0x7fdef6ef94ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid  3698] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid  3699] futex(0x7fdef6ef94e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid  3698] futex(0x7fdef6ef94e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid  3699] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR <unfinished ...>
[pid  3698] <... futex resumed>)        = 0
[pid  3699] <... openat resumed>)       = 7
[pid  3698] futex(0x7fdef6ef94ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid  3699] write(7, "5", 1)            = 1
[pid  3699] ioctl(6, NBD_DO_IT <unfinished ...>
[pid  3698] <... futex resumed>)        = -1 ETIMEDOUT (Connection timed out)
[   63.585728][ T3699] ------------[ cut here ]------------
[   63.585735][ T3699] kernfs: can not remove 'nr_tags', no directory
[   63.585854][ T3699] WARNING: CPU: 0 PID: 3699 at fs/kernfs/dir.c:1576 kernfs_remove_by_name_ns+0xed/0x110
[   63.607719][ T3699] Modules linked in:
[   63.612077][ T3699] CPU: 0 PID: 3699 Comm: syz-executor265 Not tainted 5.18.0-next-20220527-syzkaller #0
[   63.621820][ T3699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   63.632042][ T3699] RIP: 0010:kernfs_remove_by_name_ns+0xed/0x110
[   63.639929][ T3699] Code: c3 e8 b7 0e 78 ff 4c 89 e7 41 bc fe ff ff ff e8 69 c4 5a ff eb da e8 a2 0e 78 ff 4c 89 ee 48 c7 c7 60 54 df 89 e8 dd d9 2f 07 <0f> 0b 41 bc fe ff ff ff eb bc e8 54 d4 c4 ff e9 71 ff ff ff e8 4a
[   63.659689][ T3699] RSP: 0018:ffffc90002fbfa38 EFLAGS: 00010286
[   63.665877][ T3699] RAX: 0000000000000000 RBX: ffffffff8c6715e8 RCX: 0000000000000000
[   63.673988][ T3699] RDX: ffff88802532bb00 RSI: ffffffff81610068 RDI: fffff520005f7f39
[   63.681991][ T3699] RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
[   63.690087][ T3699] R10: 0000000080000000 R11: 0000000000000001 R12: 0000000000000000
[   63.698200][ T3699] R13: ffffffff8a267d60 R14: 0000000000000000 R15: 0000000000000002
[   63.706290][ T3699] FS:  00007fdef6e22700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
[   63.715372][ T3699] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   63.722070][ T3699] CR2: 00007fdef6eb6450 CR3: 0000000021d88000 CR4: 00000000003506f0
[   63.730149][ T3699] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   63.738337][ T3699] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   63.746424][ T3699] Call Trace:
[   63.749710][ T3699]  <TASK>
[   63.752652][ T3699]  remove_files+0x96/0x1c0
[   63.757266][ T3699]  sysfs_remove_group+0x87/0x170
[   63.762258][ T3699]  sysfs_remove_groups+0x5c/0xa0
[   63.767341][ T3699]  __kobject_del+0x89/0x200
[   63.771892][ T3699]  kobject_del+0x3c/0x60
[   63.776296][ T3699]  blk_mq_sysfs_unregister+0x247/0x2c0
[pid  3698] exit_group(0)               = ?
[   63.781793][ T3699]  ? __blk_mq_register_dev+0x5b0/0x5b0
[   63.787714][ T3699]  ? blk_mq_debugfs_register_hctxs+0x100/0x100
[   63.794033][ T3699]  blk_mq_update_nr_hw_queues+0x48c/0xe10
[   63.799792][ T3699]  ? blk_mq_init_queue+0x140/0x140
[   63.805030][ T3699]  ? tomoyo_execute_permission+0x4a0/0x4a0
[   63.810880][ T3699]  nbd_start_device+0x153/0xc30
[   63.815847][ T3699]  ? bpf_lsm_capable+0x5/0x10
[   63.820556][ T3699]  ? security_capable+0x8f/0xc0
[   63.825555][ T3699]  nbd_ioctl+0x570/0xb90
[   63.829845][ T3699]  ? blkdev_bszset+0x1f0/0x1f0
[   63.834724][ T3699]  ? nbd_start_device+0xc30/0xc30
[   63.839781][ T3699]  ? find_held_lock+0x2d/0x110
[   63.844649][ T3699]  ? ptrace_notify+0xfa/0x140
[   63.849357][ T3699]  ? nbd_start_device+0xc30/0xc30
[   63.854522][ T3699]  blkdev_ioctl+0x36e/0x800
[   63.859050][ T3699]  ? blkdev_common_ioctl+0x1a50/0x1a50
[   63.864630][ T3699]  ? bpf_lsm_file_ioctl+0x5/0x10
[   63.869601][ T3699]  ? blkdev_common_ioctl+0x1a50/0x1a50
[   63.875187][ T3699]  __x64_sys_ioctl+0x193/0x200
[   63.879989][ T3699]  do_syscall_64+0x35/0xb0
[   63.884518][ T3699]  entry_SYSCALL_64_after_hwframe+0x46/0xb0
[   63.890448][ T3699] RIP: 0033:0x7fdef6e752a9
[   63.895051][ T3699] 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
[   63.914972][ T3699] RSP: 002b:00007fdef6e222e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   63.923514][ T3699] RAX: ffffffffffffffda RBX: 00007fdef6ef94e0 RCX: 00007fdef6e752a9
[   63.931488][ T3699] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006
[   63.939560][ T3699] RBP: 00007fdef6ec6184 R08: 0000000000000001 R09: 0000000000000035
[   63.947639][ T3699] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdef6ef94ec
[   63.955723][ T3699] R13: 00007fdef6e222f0 R14: 00007fdef6ef94e8 R15: 0000000000000001
[   63.963806][ T3699]  </TASK>
[   63.966831][ T3699] Kernel panic - not syncing: panic_on_warn set ...
[   63.973412][ T3699] CPU: 0 PID: 3699 Comm: syz-executor265 Not tainted 5.18.0-next-20220527-syzkaller #0
[   63.983053][ T3699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   63.993111][ T3699] Call Trace:
[   63.996395][ T3699]  <TASK>
[   63.999315][ T3699]  dump_stack_lvl+0xcd/0x134
[   64.003904][ T3699]  panic+0x2d7/0x636
[   64.007794][ T3699]  ? panic_print_sys_info.part.0+0x10b/0x10b
[   64.013777][ T3699]  ? __warn.cold+0x1d9/0x2cd
[   64.018361][ T3699]  ? kernfs_remove_by_name_ns+0xed/0x110
[   64.023996][ T3699]  __warn.cold+0x1ea/0x2cd
[   64.028427][ T3699]  ? kernfs_remove_by_name_ns+0xed/0x110
[   64.034071][ T3699]  report_bug+0x1bc/0x210
[   64.038416][ T3699]  handle_bug+0x3c/0x60
[   64.042585][ T3699]  exc_invalid_op+0x14/0x40
[   64.047104][ T3699]  asm_exc_invalid_op+0x1b/0x20
[   64.051971][ T3699] RIP: 0010:kernfs_remove_by_name_ns+0xed/0x110
[   64.058224][ T3699] Code: c3 e8 b7 0e 78 ff 4c 89 e7 41 bc fe ff ff ff e8 69 c4 5a ff eb da e8 a2 0e 78 ff 4c 89 ee 48 c7 c7 60 54 df 89 e8 dd d9 2f 07 <0f> 0b 41 bc fe ff ff ff eb bc e8 54 d4 c4 ff e9 71 ff ff ff e8 4a
[   64.077839][ T3699] RSP: 0018:ffffc90002fbfa38 EFLAGS: 00010286
[   64.083911][ T3699] RAX: 0000000000000000 RBX: ffffffff8c6715e8 RCX: 0000000000000000
[   64.091890][ T3699] RDX: ffff88802532bb00 RSI: ffffffff81610068 RDI: fffff520005f7f39
[   64.099860][ T3699] RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
[   64.107832][ T3699] R10: 0000000080000000 R11: 0000000000000001 R12: 0000000000000000
[   64.115803][ T3699] R13: ffffffff8a267d60 R14: 0000000000000000 R15: 0000000000000002
[   64.123792][ T3699]  ? vprintk+0x88/0x90
[   64.127874][ T3699]  ? kernfs_remove_by_name_ns+0xed/0x110
[   64.133522][ T3699]  remove_files+0x96/0x1c0
[   64.137958][ T3699]  sysfs_remove_group+0x87/0x170
[   64.142912][ T3699]  sysfs_remove_groups+0x5c/0xa0
[   64.147871][ T3699]  __kobject_del+0x89/0x200
[   64.152383][ T3699]  kobject_del+0x3c/0x60
[   64.156633][ T3699]  blk_mq_sysfs_unregister+0x247/0x2c0
[   64.162115][ T3699]  ? __blk_mq_register_dev+0x5b0/0x5b0
[   64.167579][ T3699]  ? blk_mq_debugfs_register_hctxs+0x100/0x100
[   64.173766][ T3699]  blk_mq_update_nr_hw_queues+0x48c/0xe10
[   64.179500][ T3699]  ? blk_mq_init_queue+0x140/0x140
[   64.184618][ T3699]  ? tomoyo_execute_permission+0x4a0/0x4a0
[   64.190446][ T3699]  nbd_start_device+0x153/0xc30
[   64.195307][ T3699]  ? bpf_lsm_capable+0x5/0x10
[   64.199991][ T3699]  ? security_capable+0x8f/0xc0
[   64.204861][ T3699]  nbd_ioctl+0x570/0xb90
[   64.209118][ T3699]  ? blkdev_bszset+0x1f0/0x1f0
[   64.213889][ T3699]  ? nbd_start_device+0xc30/0xc30
[   64.218926][ T3699]  ? find_held_lock+0x2d/0x110
[   64.223717][ T3699]  ? ptrace_notify+0xfa/0x140
[   64.228402][ T3699]  ? nbd_start_device+0xc30/0xc30
[   64.233449][ T3699]  blkdev_ioctl+0x36e/0x800
[   64.237964][ T3699]  ? blkdev_common_ioctl+0x1a50/0x1a50
[   64.243451][ T3699]  ? bpf_lsm_file_ioctl+0x5/0x10
[   64.248416][ T3699]  ? blkdev_common_ioctl+0x1a50/0x1a50
[   64.253897][ T3699]  __x64_sys_ioctl+0x193/0x200
[   64.258689][ T3699]  do_syscall_64+0x35/0xb0
[   64.263124][ T3699]  entry_SYSCALL_64_after_hwframe+0x46/0xb0
[   64.269035][ T3699] RIP: 0033:0x7fdef6e752a9
[   64.273457][ T3699] 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
[   64.293335][ T3699] RSP: 002b:00007fdef6e222e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   64.301759][ T3699] RAX: ffffffffffffffda RBX: 00007fdef6ef94e0 RCX: 00007fdef6e752a9
[   64.309732][ T3699] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006
[   64.317711][ T3699] RBP: 00007fdef6ec6184 R08: 0000000000000001 R09: 0000000000000035
[   64.325717][ T3699] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdef6ef94ec
[   64.333696][ T3699] R13: 00007fdef6e222f0 R14: 00007fdef6ef94e8 R15: 0000000000000001
[   64.341688][ T3699]  </TASK>
[   64.345022][ T3699] Kernel Offset: disabled
[   64.349390][ T3699] Rebooting in 86400 seconds..