./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor674486198 <...> Warning: Permanently added '10.128.0.135' (ED25519) to the list of known hosts. execve("./syz-executor674486198", ["./syz-executor674486198"], 0x7ffcfdb11340 /* 10 vars */) = 0 brk(NULL) = 0x55555687c000 brk(0x55555687cd40) = 0x55555687cd40 arch_prctl(ARCH_SET_FS, 0x55555687c3c0) = 0 set_tid_address(0x55555687c690) = 5072 set_robust_list(0x55555687c6a0, 24) = 0 rseq(0x55555687cce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor674486198", 4096) = 27 getrandom("\x98\x6d\x8f\x7e\x44\x72\x64\x1e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555687cd40 brk(0x55555689dd40) = 0x55555689dd40 brk(0x55555689e000) = 0x55555689e000 mprotect(0x7f352e22c000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555687c690) = 5073 ./strace-static-x86_64: Process 5073 attached [pid 5073] set_robust_list(0x55555687c6a0, 24) = 0 [pid 5073] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5073] setpgid(0, 0) = 0 [pid 5073] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5073] write(3, "1000", 4) = 4 [pid 5073] close(3) = 0 [pid 5073] futex(0x7f352e23234c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5073] rt_sigaction(SIGRT_1, {sa_handler=0x7f352e1ce720, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f352e1bfda0}, NULL, 8) = 0 [pid 5073] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5073] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f352e143000 [pid 5073] mprotect(0x7f352e144000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5073] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5073] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f352e163990, parent_tid=0x7f352e163990, exit_signal=0, stack=0x7f352e143000, stack_size=0x20300, tls=0x7f352e1636c0}./strace-static-x86_64: Process 5074 attached [pid 5074] rseq(0x7f352e163fe0, 0x20, 0, 0x53053053 [pid 5073] <... clone3 resumed> => {parent_tid=[5074]}, 88) = 5074 [pid 5074] <... rseq resumed>) = 0 [pid 5074] set_robust_list(0x7f352e1639a0, 24) = 0 [pid 5074] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5073] rt_sigprocmask(SIG_SETMASK, [], [pid 5074] futex(0x7f352e232348, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5073] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5073] futex(0x7f352e232348, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5074] <... futex resumed>) = 0 [pid 5073] futex(0x7f352e23234c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5074] bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_DEVMAP_HASH, key_size=4, value_size=8, max_entries=8, map_flags=0, inner_map_fd=-1, map_name="", map_ifindex=0, btf_fd=-1, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0, map_extra=0}, 72) = 3 [pid 5074] futex(0x7f352e23234c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5074] futex(0x7f352e232348, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5073] <... futex resumed>) = 0 [pid 5073] futex(0x7f352e232348, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5073] futex(0x7f352e23234c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5074] <... futex resumed>) = 0 [pid 5074] socketpair(AF_UNIX, SOCK_STREAM, 0, [4, 5]) = 0 [pid 5074] futex(0x7f352e23234c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5073] <... futex resumed>) = 0 [pid 5073] futex(0x7f352e232348, FUTEX_WAKE_PRIVATE, 1000000 [pid 5074] recvmsg(5, [pid 5073] <... futex resumed>) = 0 [pid 5073] futex(0x7f352e23234c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5073] futex(0x7f352e23234c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 5073] futex(0x7f352e23235c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5073] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f352e122000 [pid 5073] mprotect(0x7f352e123000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5073] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5073] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f352e142990, parent_tid=0x7f352e142990, exit_signal=0, stack=0x7f352e122000, stack_size=0x20300, tls=0x7f352e1426c0}./strace-static-x86_64: Process 5075 attached => {parent_tid=[5075]}, 88) = 5075 [pid 5075] rseq(0x7f352e142fe0, 0x20, 0, 0x53053053) = 0 [pid 5073] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5075] set_robust_list(0x7f352e1429a0, 24) = 0 [pid 5075] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5075] futex(0x7f352e232358, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5073] futex(0x7f352e232358, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5075] <... futex resumed>) = 0 [pid 5073] futex(0x7f352e23235c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5075] bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_RINGBUF, key_size=0, value_size=0, max_entries=262144, map_flags=0, inner_map_fd=0, map_name="", map_ifindex=0, btf_fd=0, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0, map_extra=0}, 72) = 6 [pid 5075] futex(0x7f352e23235c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5073] <... futex resumed>) = 0 [pid 5075] futex(0x7f352e232358, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5073] futex(0x7f352e232358, FUTEX_WAKE_PRIVATE, 1000000 [pid 5075] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5073] <... futex resumed>) = 0 [pid 5075] sendmsg(5, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xaf\x41\x58\x18\xf0\xf6\xc5\x80\xe6\xe9\x76\x09\x97\x88\x3e\x48\xb6\xc8\x0f\x20\xaa\xbb\xe4\x88\xa2\xb1\x86\xd9\xd8\xc8\xcc\xf9\x3e\x60\xcd\xeb\x9f\xdf\x99\xeb\x99\xa2\x57\x7e\x97\x4a\x48\xea\xfe\x67\xfb\x97\xca\xcd\xc1\x67\xf0\xd3\x6f\x12\xf0\xbd\xf1\xf3\xcb\x05\x6d\x86\xdd\x86\x8b\x68\xfc\x71\x99\x0e\x0b\x19\xdf\x6e\xaf\x66\x40\x15\xa1\x75\x7e\xa6\x27\x1e\xdc\xa7\xa1\x48\xac\xba\xa4\xbb\x6e\x79"..., iov_len=222}, {iov_base=NULL, iov_len=0}, {iov_base=NULL, iov_len=0}, {iov_base=NULL, iov_len=0}, {iov_base=NULL, iov_len=0}, {iov_base=NULL, iov_len=0}, {iov_base=NULL, iov_len=0}], msg_iovlen=7, msg_control=[{cmsg_len=44, cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, cmsg_data=[6, 3, 4, 6, 6, 5, 6]}], msg_controllen=48, msg_flags=MSG_MORE}, MSG_OOB|MSG_PROBE|MSG_DONTWAIT|MSG_MORE [pid 5073] futex(0x7f352e23235c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5075] <... sendmsg resumed>) = 222 [pid 5075] futex(0x7f352e23235c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5075] futex(0x7f352e232358, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5073] <... futex resumed>) = 0 [pid 5073] futex(0x7f352e232358, FUTEX_WAKE_PRIVATE, 1000000 [pid 5075] <... futex resumed>) = 0 [pid 5073] <... futex resumed>) = 1 [pid 5075] sendmsg(4, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x1c", iov_len=1}], msg_iovlen=1, msg_control=[{cmsg_len=20, cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, cmsg_data=[0]}], msg_controllen=24, msg_flags=0}, MSG_OOB|MSG_DONTWAIT [pid 5073] futex(0x7f352e23235c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5075] <... sendmsg resumed>) = 1 [pid 5075] futex(0x7f352e23235c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5073] <... futex resumed>) = 0 [pid 5075] futex(0x7f352e232358, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5073] exit_group(0 [pid 5074] <... recvmsg resumed> ) = ? [pid 5073] <... exit_group resumed>) = ? [pid 5075] <... futex resumed>) = ? [pid 5074] +++ exited with 0 +++ [pid 5075] +++ exited with 0 +++ [pid 5073] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5073, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5076 attached [pid 5076] set_robust_list(0x55555687c6a0, 24 [pid 5072] <... clone resumed>, child_tidptr=0x55555687c690) = 5076 [pid 5076] <... set_robust_list resumed>) = 0 [pid 5076] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5076] setpgid(0, 0) = 0 [pid 5076] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5076] write(3, "1000", 4) = 4 [pid 5076] close(3) = 0 [pid 5076] futex(0x7f352e23234c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5076] rt_sigaction(SIGRT_1, {sa_handler=0x7f352e1ce720, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f352e1bfda0}, NULL, 8) = 0 [pid 5076] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5076] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f352e143000 [pid 5076] mprotect(0x7f352e144000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5076] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5076] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f352e163990, parent_tid=0x7f352e163990, exit_signal=0, stack=0x7f352e143000, stack_size=0x20300, tls=0x7f352e1636c0}./strace-static-x86_64: Process 5077 attached => {parent_tid=[5077]}, 88) = 5077 [pid 5076] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5077] rseq(0x7f352e163fe0, 0x20, 0, 0x53053053) = 0 [pid 5076] futex(0x7f352e232348, FUTEX_WAKE_PRIVATE, 1000000 [pid 5077] set_robust_list(0x7f352e1639a0, 24 [pid 5076] <... futex resumed>) = 0 [pid 5077] <... set_robust_list resumed>) = 0 [pid 5076] futex(0x7f352e23234c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5077] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5077] bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_DEVMAP_HASH, key_size=4, value_size=8, max_entries=8, map_flags=0, inner_map_fd=-1, map_name="", map_ifindex=0, btf_fd=-1, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0, map_extra=0}, 72) = 3 [pid 5077] futex(0x7f352e23234c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5077] futex(0x7f352e232348, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5076] <... futex resumed>) = 0 [pid 5076] futex(0x7f352e232348, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5077] <... futex resumed>) = 0 [pid 5076] futex(0x7f352e23234c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5077] socketpair(AF_UNIX, SOCK_STREAM, 0, [4, 5]) = 0 [pid 5077] futex(0x7f352e23234c, FUTEX_WAKE_PRIVATE, 1000000 [pid 5076] <... futex resumed>) = 0 [pid 5077] <... futex resumed>) = 1 [pid 5076] futex(0x7f352e232348, FUTEX_WAKE_PRIVATE, 1000000 [pid 5077] recvmsg(5, [pid 5076] <... futex resumed>) = 0 [ 75.140848][ T42] [ 75.143264][ T42] ============================================ [ 75.149522][ T42] WARNING: possible recursive locking detected [ 75.155698][ T42] 6.8.0-syzkaller-05243-g14bb1e8c8d4a #0 Not tainted [ 75.162420][ T42] -------------------------------------------- [ 75.169376][ T42] kworker/u8:2/42 is trying to acquire lock: [ 75.175386][ T42] ffffffff8f48b758 (unix_gc_lock){+.+.}-{2:2}, at: unix_notinflight+0x204/0x390 [ 75.184488][ T42] [pid 5076] futex(0x7f352e23234c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5076] futex(0x7f352e23235c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5076] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f352e122000 [pid 5076] mprotect(0x7f352e123000, 131072, PROT_READ|PROT_WRITE) = 0 [ 75.184488][ T42] but task is already holding lock: [ 75.191862][ T42] ffffffff8f48b758 (unix_gc_lock){+.+.}-{2:2}, at: __unix_gc+0x117/0xf10 [ 75.200378][ T42] [ 75.200378][ T42] other info that might help us debug this: [ 75.208713][ T42] Possible unsafe locking scenario: [ 75.208713][ T42] [ 75.216532][ T42] CPU0 [ 75.220002][ T42] ---- [ 75.223373][ T42] lock(unix_gc_lock); [ 75.227548][ T42] lock(unix_gc_lock); [ 75.231721][ T42] [ 75.231721][ T42] *** DEADLOCK *** [ 75.231721][ T42] [pid 5076] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5076] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f352e142990, parent_tid=0x7f352e142990, exit_signal=0, stack=0x7f352e122000, stack_size=0x20300, tls=0x7f352e1426c0}./strace-static-x86_64: Process 5078 attached [pid 5078] rseq(0x7f352e142fe0, 0x20, 0, 0x53053053 [pid 5076] <... clone3 resumed> => {parent_tid=[5078]}, 88) = 5078 [pid 5078] <... rseq resumed>) = 0 [pid 5078] set_robust_list(0x7f352e1429a0, 24 [pid 5076] rt_sigprocmask(SIG_SETMASK, [], [pid 5078] <... set_robust_list resumed>) = 0 [pid 5076] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5078] rt_sigprocmask(SIG_SETMASK, [], [pid 5076] futex(0x7f352e232358, FUTEX_WAKE_PRIVATE, 1000000 [pid 5078] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5076] <... futex resumed>) = 0 [pid 5078] bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_RINGBUF, key_size=0, value_size=0, max_entries=262144, map_flags=0, inner_map_fd=0, map_name="", map_ifindex=0, btf_fd=0, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0, map_extra=0}, 72) = 6 [pid 5076] futex(0x7f352e23235c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5078] futex(0x7f352e23235c, FUTEX_WAKE_PRIVATE, 1000000 [pid 5076] <... futex resumed>) = 0 [pid 5076] futex(0x7f352e232358, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5076] futex(0x7f352e23235c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5078] <... futex resumed>) = 1 [ 75.239878][ T42] May be due to missing lock nesting notation [ 75.239878][ T42] [ 75.248209][ T42] 3 locks held by kworker/u8:2/42: [ 75.253342][ T42] #0: ffff888014c81148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 [ 75.265035][ T42] #1: ffffc90000b37d00 (unix_gc_work){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 [ 75.275276][ T42] #2: ffffffff8f48b758 (unix_gc_lock){+.+.}-{2:2}, at: __unix_gc+0x117/0xf10 [ 75.284344][ T42] [ 75.284344][ T42] stack backtrace: [ 75.290365][ T42] CPU: 0 PID: 42 Comm: kworker/u8:2 Not tainted 6.8.0-syzkaller-05243-g14bb1e8c8d4a #0 [ 75.300115][ T42] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 75.310467][ T42] Workqueue: events_unbound __unix_gc [ 75.315867][ T42] Call Trace: [ 75.319162][ T42] [ 75.322120][ T42] dump_stack_lvl+0x1e7/0x2e0 [ 75.327152][ T42] ? __pfx_dump_stack_lvl+0x10/0x10 [ 75.332408][ T42] ? print_deadlock_bug+0x479/0x620 [ 75.337903][ T42] ? _find_first_zero_bit+0xd4/0x100 [ 75.343592][ T42] validate_chain+0x15c1/0x58e0 [ 75.348557][ T42] ? lockdep_unlock+0x16a/0x300 [ 75.353461][ T42] ? __pfx_validate_chain+0x10/0x10 [ 75.358789][ T42] ? add_lock_to_list+0x1de/0x2e0 [ 75.363940][ T42] ? validate_chain+0x15a2/0x58e0 [ 75.369181][ T42] ? mark_lock+0x9a/0x350 [ 75.373619][ T42] __lock_acquire+0x1346/0x1fd0 [ 75.378531][ T42] lock_acquire+0x1e4/0x530 [ 75.383185][ T42] ? unix_notinflight+0x204/0x390 [ 75.388263][ T42] ? __pfx_lock_acquire+0x10/0x10 [ 75.393316][ T42] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 75.398808][ T42] ? scan_children+0x2ce/0x480 [ 75.403721][ T42] _raw_spin_lock+0x2e/0x40 [ 75.408260][ T42] ? unix_notinflight+0x204/0x390 [ 75.413371][ T42] unix_notinflight+0x204/0x390 [ 75.418305][ T42] unix_destruct_scm+0x221/0x350 [ 75.423447][ T42] ? __pfx_unix_destruct_scm+0x10/0x10 [ 75.428924][ T42] ? scan_children+0x2ce/0x480 [ 75.433805][ T42] ? __lock_acquire+0x1346/0x1fd0 [ 75.438865][ T42] ? __pfx_inc_inflight+0x10/0x10 [ 75.444078][ T42] skb_release_head_state+0x100/0x250 [ 75.449777][ T42] ? __unix_gc+0xaf3/0xf10 [ 75.454396][ T42] kfree_skb_reason+0x15d/0x390 [ 75.459408][ T42] __unix_gc+0xaf3/0xf10 [ 75.463864][ T42] ? __pfx___unix_gc+0x10/0x10 [ 75.468753][ T42] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 75.475235][ T42] ? process_scheduled_works+0x91b/0x1770 [ 75.480964][ T42] process_scheduled_works+0xa00/0x1770 [ 75.486639][ T42] ? __pfx_process_scheduled_works+0x10/0x10 [ 75.492640][ T42] ? assign_work+0x364/0x3d0 [ 75.497588][ T42] worker_thread+0x86d/0xd70 [ 75.502203][ T42] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 75.508449][ T42] ? __kthread_parkme+0x169/0x1d0 [ 75.513574][ T42] ? __pfx_worker_thread+0x10/0x10 [ 75.518718][ T42] kthread+0x2f0/0x390 [ 75.522824][ T42] ? __pfx_worker_thread+0x10/0x10 [ 75.527960][ T42] ? __pfx_kthread+0x10/0x10 [ 75.532568][ T42] ret_from_fork+0x4b/0x80 [ 75.537050][ T42] ? __pfx_kthread+0x10/0x10 [ 75.541852][ T42] ret_from_fork_asm+0x1a/0x30 [ 75.546629][ T42]