ci-upstream-net-kasan-gce/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci-upstream-net-kasan-gce/syz-executor162023192 <...> Warning: Permanently added '10.128.0.247' (ED25519) to the list of known hosts. execve("ci-upstream-net-kasan-gce/syz-executor162023192", ["ci-upstream-net-kasan-gce/syz-executor162023192"], 0x7fffc1b991f0 /* 10 vars */) = 0 brk(NULL) = 0x555587523000 brk(0x555587523d80) = 0x555587523d80 arch_prctl(ARCH_SET_FS, 0x555587523400) = 0 set_tid_address(0x5555875236d0) = 5648 set_robust_list(0x5555875236e0, 24) = 0 rseq({cpu_id_start=0, cpu_id=RSEQ_CPU_ID_UNINITIALIZED, rseq_cs=NULL, flags=0, node_id=0, mm_cid=0, slice_ctrl={request=0, granted=0, __reserved=0}, __reserved=0}, 33, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlinkat(AT_FDCWD, "/proc/self/exe", "/root/ci-upstream-net-kasan-gce/syz-executor162023192", 4096) = 53 getrandom("\x75\x05\xd1\x9d\x36\xe0\xde\xa5", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555587523d80 brk(0x555587544d80) = 0x555587544d80 brk(0x555587545000) = 0x555587545000 mprotect(0x7f6dfd8b0000, 20480, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555875236d0) = 5649 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5649 attached [pid 5648] rt_sigprocmask(SIG_SETMASK, [] [pid 5649] set_robust_list(0x5555875236e0, 24 [pid 5648] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5648] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5649] <... set_robust_list resumed>) = 0 [pid 5648] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5648] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5649] rt_sigprocmask(SIG_SETMASK, []ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5650 attached [pid 5648] <... clone resumed>, child_tidptr=0x5555875236d0) = 5650 [pid 5648] rt_sigprocmask(SIG_SETMASK, [] [pid 5650] set_robust_list(0x5555875236e0, 24 [pid 5648] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5650] <... set_robust_list resumed>) = 0 [pid 5649] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5648] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5650] rt_sigprocmask(SIG_SETMASK, [] [pid 5649] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5648] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5648] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5649] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5650] <... rt_sigprocmask resumed>, NULL, 8) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5651 attached [pid 5650] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5649] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5648] <... clone resumed>, child_tidptr=0x5555875236d0) = 5651 [pid 5651] set_robust_list(0x5555875236e0, 24 [pid 5650] <... rt_sigprocmask resumed>, [], 8) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5652 attached [pid 5648] rt_sigprocmask(SIG_SETMASK, [] [pid 5651] <... set_robust_list resumed>) = 0 [pid 5650] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5648] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5648] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5652] set_robust_list(0x5555875236e0, 24 [pid 5651] rt_sigprocmask(SIG_SETMASK, [] [pid 5649] <... clone resumed>, child_tidptr=0x5555875236d0) = 5652 [pid 5648] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5652] <... set_robust_list resumed>) = 0 [pid 5651] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5649] rt_sigprocmask(SIG_SETMASK, [] [pid 5648] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5652] rt_sigprocmask(SIG_SETMASK, []ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5653 attached [pid 5651] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5649] <... rt_sigprocmask resumed>, NULL, 8) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5654 attached [pid 5652] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5648] <... clone resumed>, child_tidptr=0x5555875236d0) = 5654 [pid 5654] set_robust_list(0x5555875236e0, 24 [pid 5653] set_robust_list(0x5555875236e0, 24 [pid 5652] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5651] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5648] rt_sigprocmask(SIG_SETMASK, [] [pid 5653] <... set_robust_list resumed>) = 0 [pid 5651] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5650] <... clone resumed>, child_tidptr=0x5555875236d0) = 5653 [pid 5648] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5654] <... set_robust_list resumed>) = 0 [pid 5652] <... prctl resumed>) = 0 [pid 5648] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5654] rt_sigprocmask(SIG_SETMASK, [] [pid 5653] rt_sigprocmask(SIG_SETMASK, [] [pid 5652] setpgid(0, 0 [pid 5650] rt_sigprocmask(SIG_SETMASK, [] [pid 5648] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5654] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5652] <... setpgid resumed>) = 0 [pid 5648] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5654] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5652] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECci-upstream-net-kasan-gce/strace-static-x86_64: Process 5655 attached [pid 5654] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5653] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5651] <... clone resumed>, child_tidptr=0x5555875236d0) = 5655 [pid 5650] <... rt_sigprocmask resumed>, NULL, 8) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5656 attached [pid 5648] <... clone resumed>, child_tidptr=0x5555875236d0) = 5656 [pid 5655] set_robust_list(0x5555875236e0, 24 [pid 5654] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5653] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5652] <... openat resumed>) = 3 [pid 5648] rt_sigprocmask(SIG_SETMASK, [] [pid 5656] set_robust_list(0x5555875236e0, 24 [pid 5655] <... set_robust_list resumed>) = 0 [pid 5653] <... prctl resumed>) = 0 [pid 5651] rt_sigprocmask(SIG_SETMASK, [] [pid 5655] rt_sigprocmask(SIG_SETMASK, [] [pid 5653] setpgid(0, 0 [pid 5655] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5653] <... setpgid resumed>) = 0 [pid 5651] <... rt_sigprocmask resumed>, NULL, 8) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5657 attached [pid 5648] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5656] <... set_robust_list resumed>) = 0 [pid 5655] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5653] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5652] write(3, "1000", 4 [pid 5657] set_robust_list(0x5555875236e0, 24 [pid 5656] rt_sigprocmask(SIG_SETMASK, [] [pid 5655] <... prctl resumed>) = 0 [pid 5654] <... clone resumed>, child_tidptr=0x5555875236d0) = 5657 executing program executing program [pid 5653] <... openat resumed>) = 3 [pid 5652] <... write resumed>) = 4 [pid 5657] <... set_robust_list resumed>) = 0 [pid 5656] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5655] setpgid(0, 0 [pid 5654] rt_sigprocmask(SIG_SETMASK, [] [pid 5653] write(3, "1000", 4 [pid 5652] close(3 [pid 5657] rt_sigprocmask(SIG_SETMASK, [] [pid 5656] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5657] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5656] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5655] <... setpgid resumed>) = 0 [pid 5654] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5653] <... write resumed>) = 4 [pid 5652] <... close resumed>) = 0 [pid 5657] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5656] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5657] <... prctl resumed>) = 0 [pid 5655] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5653] close(3 [pid 5652] write(1, "executing program\n", 18 [pid 5657] setpgid(0, 0 [pid 5655] <... openat resumed>) = 3 [pid 5653] <... close resumed>) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5658 attached [pid 5657] <... setpgid resumed>) = 0 [pid 5656] <... clone resumed>, child_tidptr=0x5555875236d0) = 5658 [pid 5652] <... write resumed>) = 18 [pid 5658] set_robust_list(0x5555875236e0, 24 [pid 5657] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5658] <... set_robust_list resumed>) = 0 [pid 5657] <... openat resumed>) = 3 [pid 5656] rt_sigprocmask(SIG_SETMASK, [] [pid 5655] write(3, "1000", 4 [pid 5653] write(1, "executing program\n", 18 [pid 5652] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5658] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5657] write(3, "1000", 4 [pid 5656] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5655] <... write resumed>) = 4 [pid 5653] <... write resumed>) = 18 [pid 5658] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5657] <... write resumed>) = 4 [pid 5652] <... socket resumed>) = 3 [pid 5658] <... prctl resumed>) = 0 [pid 5657] close(3 [pid 5655] close(3 [pid 5653] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5652] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=20, nlmsg_type=0x27 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=491510, nlmsg_pid=635427838}, "\x06\x00\x00\x00"], iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_DONTROUTE|MSG_CONFIRM|MSG_NOSIGNAL|MSG_MORE|MSG_BATCH}, MSG_EOR|MSG_BATCH|MSG_FASTOPEN [pid 5658] setpgid(0, 0 [pid 5657] <... close resumed>) = 0 [pid 5655] <... close resumed>) = 0 [pid 5653] <... socket resumed>) = 3 [pid 5658] <... setpgid resumed>) = 0 [pid 5657] write(1, "executing program\n", 18 executing program [pid 5658] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5657] <... write resumed>) = 18 [pid 5658] <... openat resumed>) = 3 [pid 5655] write(1, "executing program\n", 18 executing program [pid 5653] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=20, nlmsg_type=0x27 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=491510, nlmsg_pid=635427838}, "\x06\x00\x00\x00"], iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_DONTROUTE|MSG_CONFIRM|MSG_NOSIGNAL|MSG_MORE|MSG_BATCH}, MSG_EOR|MSG_BATCH|MSG_FASTOPEN [pid 5658] write(3, "1000", 4 [pid 5657] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5655] <... write resumed>) = 18 [pid 5658] <... write resumed>) = 4 [pid 5657] <... socket resumed>) = 3 [pid 5658] close(3 [pid 5657] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=20, nlmsg_type=0x27 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=491510, nlmsg_pid=635427838}, "\x06\x00\x00\x00"], iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_DONTROUTE|MSG_CONFIRM|MSG_NOSIGNAL|MSG_MORE|MSG_BATCH}, MSG_EOR|MSG_BATCH|MSG_FASTOPEN [pid 5658] <... close resumed>) = 0 [pid 5655] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5658] write(1, "executing program\n", 18) = 18 [pid 5658] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5655] <... socket resumed>) = 3 [pid 5658] <... socket resumed>) = 3 executing program [pid 5658] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=20, nlmsg_type=0x27 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=491510, nlmsg_pid=635427838}, "\x06\x00\x00\x00"], iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_DONTROUTE|MSG_CONFIRM|MSG_NOSIGNAL|MSG_MORE|MSG_BATCH}, MSG_EOR|MSG_BATCH|MSG_FASTOPEN [pid 5655] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=20, nlmsg_type=0x27 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=491510, nlmsg_pid=635427838}, "\x06\x00\x00\x00"], iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_DONTROUTE|MSG_CONFIRM|MSG_NOSIGNAL|MSG_MORE|MSG_BATCH}, MSG_EOR|MSG_BATCH|MSG_FASTOPEN [pid 5652] <... sendmsg resumed>) = 20 [pid 5652] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 4 [ 429.882164][ T32] INFO: task syz-executor162:5655 blocked for more than 143 seconds. [ 429.882224][ T32] Not tainted syzkaller #0 [ 429.882251][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.882267][ T32] task:syz-executor162 state:D stack:26800 pid:5655 tgid:5 ** replaying previous printk message ** [ 429.882267][ T32] task:syz-executor162 state:D stack:26800 pid:5655 tgid:5655 ppid:5651 task_flags:0x400140 flags:0x00080002 [ 429.882436][ T32] Call Trace: [ 429.882516][ T32] [ 429.882570][ T32] __schedule+0x17d4/0x5820 [ 429.882794][ T32] ? irqentry_exit+0x218/0x910 [ 429.882882][ T32] ? irqentry_exit+0x218/0x910 [ 429.882914][ T32] ? __pfx___schedule+0x10/0x10 [ 429.882941][ T32] ? schedule+0x90/0x2b0 [ 429.882961][ T32] schedule+0x164/0x2b0 [ 429.882985][ T32] schedule_preempt_disabled+0x13/0x30 [ 429.883006][ T32] __mutex_lock+0x7c1/0x1550 [ 429.883034][ T32] ? __mutex_lock+0x5d4/0x1550 [ 429.883060][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.883159][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 429.883180][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 429.883254][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 429.883330][ T32] ? do_syscall_64+0x166/0x520 [ 429.885586][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.885653][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.885681][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 429.885715][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 429.885736][ T32] ? trace_kmalloc+0x2a/0xf0 [ 429.885828][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 429.885857][ T32] ? __nla_parse+0x40/0x60 [ 429.885877][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 429.885968][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 429.888824][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 429.888860][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 429.888897][ T32] ? bpf_lsm_capable+0x9/0x20 [ 429.889017][ T32] ? security_capable+0x7e/0x2c0 [ 429.889125][ T32] genl_rcv_msg+0x614/0x7a0 [ 429.889156][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 429.889180][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 429.889214][ T32] netlink_rcv_skb+0x226/0x4a0 [ 429.889235][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 429.889260][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 429.889294][ T32] ? down_read+0x2be/0x330 [ 429.889323][ T32] genl_rcv+0x28/0x40 [ 429.889345][ T32] netlink_unicast+0x7bd/0x940 [ 429.889373][ T32] netlink_sendmsg+0x813/0xb40 [ 429.889403][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 429.889437][ T32] ? apparmor_socket_sendmsg+0x18b/0x360 [ 429.889487][ T32] ? rcu_is_watching+0x16/0xb0 [ 429.889579][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 429.889599][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 429.889711][ T32] ____sys_sendmsg+0x54e/0x850 [ 429.889734][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 429.889761][ T32] ? import_iovec+0x73/0xa0 [ 429.889848][ T32] ___sys_sendmsg+0x2a5/0x360 [ 429.889866][ T32] ? __lock_acquire+0x6df/0x2e50 [ 429.889923][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 429.889986][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 429.890003][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 429.890057][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 429.890082][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 429.890161][ T32] do_syscall_64+0x166/0x520 [ 429.890184][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.890203][ T32] ? clear_bhb_loop+0x70/0xc0 [ 429.891835][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.891857][ T32] RIP: 0033:0x7f6dfd81d739 [ 429.891927][ T32] RSP: 002b:00007ffc38572eb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 429.891981][ T32] RAX: ffffffffffffffda RBX: 0000200000000b80 RCX: 00007f6dfd81d739 [ 429.891995][ T32] RDX: 0000000020040080 RSI: 0000200000000100 RDI: 0000000000000003 [ 429.892006][ T32] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 429.892016][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 429.892027][ T32] R13: 0000000000000000 R14: 00007ffc38572ee0 R15: 00007ffc38572ed0 [ 429.892055][ T32] [ 429.892066][ T32] INFO: task syz-executor162:5658 blocked for more than 143 seconds. [ 429.892079][ T32] Not tainted syzkaller #0 [ 429.892088][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.892096][ T32] task:syz-executor162 state:D stack:27368 pid:5658 tgid:5658 ppid:5656 task_flags:0x400140 flags:0x00080002 [ 429.892147][ T32] Call Trace: [ 429.892153][ T32] [ 429.892164][ T32] __schedule+0x17d4/0x5820 [ 429.892211][ T32] ? __pfx___schedule+0x10/0x10 [ 429.892241][ T32] ? schedule+0x90/0x2b0 [ 429.892265][ T32] schedule+0x164/0x2b0 [ 429.892288][ T32] schedule_preempt_disabled+0x13/0x30 [ 429.892309][ T32] __mutex_lock+0x7c1/0x1550 [ 429.892337][ T32] ? __mutex_lock+0x5d4/0x1550 [ 429.892363][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.892385][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 429.892407][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 429.892439][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 429.892456][ T32] ? do_syscall_64+0x166/0x520 [ 429.892478][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.892504][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.892530][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 429.892563][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 429.892584][ T32] ? trace_kmalloc+0x2a/0xf0 [ 429.892612][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 429.892640][ T32] ? __nla_parse+0x40/0x60 [ 429.892661][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 429.892686][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 429.892717][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 429.892748][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 429.892785][ T32] ? bpf_lsm_capable+0x9/0x20 [ 429.892809][ T32] ? security_capable+0x7e/0x2c0 [ 429.892840][ T32] genl_rcv_msg+0x614/0x7a0 [ 429.892871][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 429.892894][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 429.892926][ T32] netlink_rcv_skb+0x226/0x4a0 [ 429.892946][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 429.892972][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 429.893006][ T32] ? down_read+0x2be/0x330 [ 429.893033][ T32] genl_rcv+0x28/0x40 [ 429.893055][ T32] netlink_unicast+0x7bd/0x940 [ 429.893084][ T32] netlink_sendmsg+0x813/0xb40 [ 429.893113][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 429.893140][ T32] ? apparmor_socket_sendmsg+0x18b/0x360 [ 429.893162][ T32] ? rcu_is_watching+0x16/0xb0 [ 429.893184][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 429.893203][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 429.893228][ T32] ____sys_sendmsg+0x54e/0x850 [ 429.896754][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 429.896788][ T32] ? import_iovec+0x73/0xa0 [ 429.896820][ T32] ___sys_sendmsg+0x2a5/0x360 [ 429.896838][ T32] ? __lock_acquire+0x6df/0x2e50 [ 429.896859][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 429.896922][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 429.896940][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 429.896962][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 429.896988][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 429.897031][ T32] do_syscall_64+0x166/0x520 [ 429.897054][ T32] ? trace_irq_disable+0x3b/0x140 [ 429.897146][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.897165][ T32] ? clear_bhb_loop+0x70/0xc0 [ 429.897187][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.897205][ T32] RIP: 0033:0x7f6dfd81d739 [ 429.897222][ T32] RSP: 002b:00007ffc38572eb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 429.897242][ T32] RAX: ffffffffffffffda RBX: 0000200000000b80 RCX: 00007f6dfd81d739 [ 429.897254][ T32] RDX: 0000000020040080 RSI: 0000200000000100 RDI: 0000000000000003 [ 429.897266][ T32] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 429.897277][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 429.897287][ T32] R13: 0000000000000000 R14: 00007ffc38572ee0 R15: 00007ffc38572ed0 [ 429.897315][ T32] [ 429.897324][ T32] INFO: task syz-executor162:5667 blocked for more than 143 seconds. [ 429.897337][ T32] Not tainted syzkaller #0 [ 429.897346][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.897354][ T32] task:syz-executor162 state:D stack:27472 pid:5667 tgid:5667 ppid:5649 task_flags:0x400140 flags:0x00080002 [ 429.897405][ T32] Call Trace: [ 429.897411][ T32] [ 429.897429][ T32] __schedule+0x17d4/0x5820 [ 429.897476][ T32] ? __pfx___schedule+0x10/0x10 [ 429.897505][ T32] ? schedule+0x90/0x2b0 [ 429.897529][ T32] schedule+0x164/0x2b0 [ 429.897552][ T32] schedule_preempt_disabled+0x13/0x30 [ 429.897572][ T32] __mutex_lock+0x7c1/0x1550 [ 429.897600][ T32] ? __mutex_lock+0x5d4/0x1550 [ 429.897627][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.897649][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 429.897670][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 429.897696][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 429.897713][ T32] ? do_syscall_64+0x166/0x520 [ 429.897734][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.897761][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.897787][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 429.897819][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 429.897840][ T32] ? trace_kmalloc+0x2a/0xf0 [ 429.897868][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 429.897896][ T32] ? __nla_parse+0x40/0x60 [ 429.897917][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 429.897949][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 429.897980][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 429.898011][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 429.898047][ T32] ? bpf_lsm_capable+0x9/0x20 [ 429.898071][ T32] ? security_capable+0x7e/0x2c0 [ 429.898103][ T32] genl_rcv_msg+0x614/0x7a0 [ 429.898133][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 429.900959][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 429.901000][ T32] netlink_rcv_skb+0x226/0x4a0 [ 429.901023][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 429.901049][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 429.901082][ T32] ? down_read+0x2be/0x330 [ 429.901110][ T32] genl_rcv+0x28/0x40 [ 429.901132][ T32] netlink_unicast+0x7bd/0x940 [ 429.901160][ T32] netlink_sendmsg+0x813/0xb40 [ 429.901189][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 429.901217][ T32] ? apparmor_socket_sendmsg+0x18b/0x360 [ 429.901254][ T32] ? rcu_is_watching+0x16/0xb0 [ 429.901275][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 429.901294][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 429.901358][ T32] ____sys_sendmsg+0x54e/0x850 [ 429.901381][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 429.901408][ T32] ? import_iovec+0x73/0xa0 [ 429.901445][ T32] ___sys_sendmsg+0x2a5/0x360 [ 429.901461][ T32] ? __lock_acquire+0x6df/0x2e50 [ 429.901482][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 429.901547][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 429.901563][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 429.901585][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 429.901610][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 429.901639][ T32] do_syscall_64+0x166/0x520 [ 429.901661][ T32] ? trace_irq_disable+0x3b/0x140 [ 429.901678][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.901696][ T32] ? clear_bhb_loop+0x70/0xc0 [ 429.901718][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.901735][ T32] RIP: 0033:0x7f6dfd81d739 [ 429.901751][ T32] RSP: 002b:00007ffc38572eb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 429.901770][ T32] RAX: ffffffffffffffda RBX: 0000200000000b80 RCX: 00007f6dfd81d739 [ 429.901783][ T32] RDX: 0000000020040080 RSI: 0000200000000100 RDI: 0000000000000003 [ 429.901795][ T32] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 429.901805][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 429.901816][ T32] R13: 00007ffc38572ecc R14: 00007ffc38572ee0 R15: 00007ffc38572ed0 [ 429.901845][ T32] [ 429.901897][ T32] [ 429.901897][ T32] Showing all locks held in the system: [ 429.901940][ T32] locks held by pr/ttyS0/16: 2, last CPU#0: [ 429.902024][ T32] #0: ffffffff8ec362b8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 [ 429.902135][ T32] #1: ffffffff9ad2aff8 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x67/0xc0 [ 429.902266][ T32] locks held by khungtaskd/32: 1, last CPU#1: [ 429.902278][ T32] #0: ffffffff8ed5c6e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 429.904767][ T32] locks held by getty/5367: 2, on CPU#0: [ 429.904783][ T32] #0: ffff888035b530a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 429.904948][ T32] #1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 [ 429.905078][ T32] locks held by syz-executor162/5655: 2, on CPU#1: [ 429.905091][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 429.905140][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.905218][ T32] locks held by syz-executor162/5657: 2, on CPU#0: [ 429.905231][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 429.905276][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.905319][ T32] locks held by syz-executor162/5658: 2, on CPU#0: [ 429.905331][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 429.905376][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.905419][ T32] locks held by syz-executor162/5667: 2, on CPU#1: [ 429.905431][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 429.905476][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.905519][ T32] locks held by syz-executor162/5991: 2, on CPU#1: [ 429.905531][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 429.905577][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 429.905622][ T32] [ 429.905627][ T32] ============================================= [ 429.905627][ T32] [ 429.905668][ T32] NMI backtrace for cpu 1 [ 429.905772][ T32] CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) [ 429.905792][ T32] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 429.905802][ T32] Call Trace: [ 429.905810][ T32] [ 429.905818][ T32] dump_stack_lvl+0xe8/0x150 [ 429.905885][ T32] nmi_cpu_backtrace+0x274/0x2d0 [ 429.905938][ T32] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 429.906056][ T32] nmi_trigger_cpumask_backtrace+0x17d/0x390 [ 429.906078][ T32] sys_info+0x135/0x170 [ 429.906095][ T32] watchdog+0xfd7/0x1030 [ 429.906157][ T32] ? watchdog+0x1c7/0x1030 [ 429.906179][ T32] kthread+0x38b/0x480 [ 429.906237][ T32] ? __pfx_watchdog+0x10/0x10 [ 429.906252][ T32] ? __pfx_kthread+0x10/0x10 [ 429.906270][ T32] ret_from_fork+0x514/0xb70 [ 429.906361][ T32] ? __pfx_ret_from_fork+0x10/0x10 [ 429.906387][ T32] ? __switch_to+0xc89/0x1420 [ 429.906463][ T32] ? __pfx_kthread+0x10/0x10 [ 429.906481][ T32] ret_from_fork_asm+0x1a/0x30 [ 429.906548][ T32] [ 429.906579][ T32] Sending NMI from CPU 1 to CPUs 0: [ 429.906633][ C0] NMI backtrace for cpu 0 [ 429.906646][ C0] CPU: 0 UID: 0 PID: 16 Comm: pr/ttyS0 Not tainted syzkaller #0 PREEMPT(full) [ 429.906666][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 429.906677][ C0] RIP: 0010:io_serial_in+0x77/0xc0 [ 429.906748][ C0] Code: e8 ae 83 56 fc 44 89 f9 d3 e3 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 7f 4b c6 fc 41 03 1e 89 da ec <0f> b6 c0 5b 41 5c 41 5e 41 5f c3 cc cc cc cc cc 44 89 f9 80 e1 07 [ 429.906766][ C0] RSP: 0018:ffffc900001578b8 EFLAGS: 00000002 [ 429.906782][ C0] RAX: 1ffffffff35a5600 RBX: 00000000000003fd RCX: 0000000000000000 [ 429.906796][ C0] RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020 [ 429.906808][ C0] RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004 [ 429.906820][ C0] R10: dffffc0000000000 R11: ffffffff85712fa0 R12: dffffc0000000000 [ 429.906836][ C0] R13: 0000000000000000 R14: ffffffff9ad2b020 R15: 0000000000000000 [ 429.906848][ C0] FS: 0000000000000000(0000) GS:ffff888124ce0000(0000) knlGS:0000000000000000 [ 429.906865][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 429.906879][ C0] CR2: 0000555587523340 CR3: 0000000073aac000 CR4: 00000000003526f0 [ 429.906896][ C0] Call Trace: [ 429.906903][ C0] [ 429.906920][ C0] wait_for_lsr+0x184/0x2f0 [ 429.906953][ C0] __serial8250_console_fifo_write+0xcd/0x3e0 [ 429.906977][ C0] serial8250_console_write+0xaa1/0x1200 [ 429.907004][ C0] ? lockdep_hardirqs_on+0x7b/0x110 [ 429.907034][ C0] ? __pfx_serial8250_console_write+0x10/0x10 [ 429.907061][ C0] ? __schedule+0x17ea/0x5820 [ 429.907092][ C0] nbcon_emit_next_record+0xef5/0x1a90 [ 429.907150][ C0] ? __pfx_nbcon_emit_next_record+0x10/0x10 [ 429.907173][ C0] ? nbcon_context_try_acquire+0x819/0xbd0 [ 429.907201][ C0] ? _raw_spin_lock_irqsave+0x4c/0x60 [ 429.907226][ C0] nbcon_kthread_func+0x679/0x880 [ 429.907249][ C0] ? nbcon_kthread_func+0x163/0x880 [ 429.907268][ C0] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 429.907291][ C0] ? __kthread_parkme+0x71/0x1f0 [ 429.907345][ C0] ? __kthread_parkme+0x199/0x1f0 [ 429.907375][ C0] kthread+0x38b/0x480 [ 429.907393][ C0] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 429.907411][ C0] ? __pfx_kthread+0x10/0x10 [ 429.907429][ C0] ret_from_fork+0x514/0xb70 [ 429.907460][ C0] ? __pfx_ret_from_fork+0x10/0x10 [ 429.907497][ C0] ? __switch_to+0xc89/0x1420 [ 429.907525][ C0] ? __pfx_kthread+0x10/0x10 [ 429.907543][ C0] ret_from_fork_asm+0x1a/0x30 [ 429.907581][ C0] [ 429.910517][ T32] Kernel panic - not syncing: hung_task: blocked tasks [ 431.593852][ T32] CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) [ 431.603059][ T32] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 431.613133][ T32] Call Trace: [ 431.616424][ T32] [ 431.619353][ T32] vpanic+0x56d/0xa60 [ 431.623401][ T32] ? __pfx___schedule+0x10/0x10 [ 431.628254][ T32] ? __pfx_vpanic+0x10/0x10 [ 431.632754][ T32] panic+0xc5/0xd0 [ 431.636493][ T32] ? __pfx_panic+0x10/0x10 [ 431.641020][ T32] ? preempt_schedule_common+0x7f/0xd0 [ 431.646495][ T32] ? preempt_schedule_thunk+0x16/0x40 [ 431.651871][ T32] ? nmi_trigger_cpumask_backtrace+0x31a/0x390 [ 431.658020][ T32] ? nmi_trigger_cpumask_backtrace+0x31f/0x390 [ 431.664198][ T32] watchdog+0x1030/0x1030 [ 431.668526][ T32] ? watchdog+0x1c7/0x1030 [ 431.672941][ T32] kthread+0x38b/0x480 [ 431.676997][ T32] ? __pfx_watchdog+0x10/0x10 [ 431.681672][ T32] ? __pfx_kthread+0x10/0x10 [ 431.686263][ T32] ret_from_fork+0x514/0xb70 [ 431.690861][ T32] ? __pfx_ret_from_fork+0x10/0x10 [ 431.695980][ T32] ? __switch_to+0xc89/0x1420 [ 431.700673][ T32] ? __pfx_kthread+0x10/0x10 [ 431.705255][ T32] ret_from_fork_asm+0x1a/0x30 [ 431.710089][ T32] [ 431.713565][ T32] Kernel Offset: disabled [ 431.717921][ T32] Rebooting in 86400 seconds..