ci-upstream-net-kasan-gce/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci-upstream-net-kasan-gce/syz-executor3062026832 <...> Warning: Permanently added '10.128.0.91' (ED25519) to the list of known hosts. execve("ci-upstream-net-kasan-gce/syz-executor3062026832", ["ci-upstream-net-kasan-gce/syz-executor3062026832"], 0x7ffe5c4e1670 /* 10 vars */) = 0 brk(NULL) = 0x555558861000 brk(0x555558861d80) = 0x555558861d80 arch_prctl(ARCH_SET_FS, 0x555558861400) = 0 set_tid_address(0x5555588616d0) = 5631 set_robust_list(0x5555588616e0, 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-executor3062026832", 4096) = 54 getrandom("\xc3\x97\xbd\x56\x9d\xf4\x3f\x3d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555558861d80 brk(0x555558882d80) = 0x555558882d80 brk(0x555558883000) = 0x555558883000 mprotect(0x7f1ab20a0000, 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|SIGCHLDci-upstream-net-kasan-gce/strace-static-x86_64: Process 5632 attached [pid 5632] set_robust_list(0x5555588616e0, 24 [pid 5631] <... clone resumed>, child_tidptr=0x5555588616d0) = 5632 [pid 5632] <... set_robust_list resumed>) = 0 [pid 5631] rt_sigprocmask(SIG_SETMASK, [] [pid 5632] rt_sigprocmask(SIG_SETMASK, [] [pid 5631] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5632] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5631] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5632] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5631] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5632] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5631] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5632] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci-upstream-net-kasan-gce/strace-static-x86_64: Process 5633 attached [pid 5633] set_robust_list(0x5555588616e0, 24ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5634 attached [pid 5632] <... clone resumed>, child_tidptr=0x5555588616d0) = 5633 [pid 5634] set_robust_list(0x5555588616e0, 24 [pid 5633] <... set_robust_list resumed>) = 0 [pid 5634] <... set_robust_list resumed>) = 0 [pid 5633] rt_sigprocmask(SIG_SETMASK, [] [pid 5631] <... clone resumed>, child_tidptr=0x5555588616d0) = 5634 [pid 5632] rt_sigprocmask(SIG_SETMASK, [] [pid 5631] rt_sigprocmask(SIG_SETMASK, [] [pid 5634] rt_sigprocmask(SIG_SETMASK, [] [pid 5633] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5632] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5631] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5633] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5631] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5634] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5633] <... prctl resumed>) = 0 [pid 5631] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5634] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5631] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5634] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5633] setpgid(0, 0 [pid 5634] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5633] <... setpgid resumed>) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5635 attached ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5636 attached [pid 5636] set_robust_list(0x5555588616e0, 24 [pid 5631] <... clone resumed>, child_tidptr=0x5555588616d0) = 5636 [pid 5635] set_robust_list(0x5555588616e0, 24 [pid 5636] <... set_robust_list resumed>) = 0 [pid 5634] <... clone resumed>, child_tidptr=0x5555588616d0) = 5635 [pid 5633] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5635] <... set_robust_list resumed>) = 0 [pid 5631] rt_sigprocmask(SIG_SETMASK, [] [pid 5635] rt_sigprocmask(SIG_SETMASK, [] [pid 5636] rt_sigprocmask(SIG_SETMASK, [] [pid 5634] rt_sigprocmask(SIG_SETMASK, [] [pid 5631] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5635] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5636] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5634] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5633] <... openat resumed>) = 3 [pid 5631] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5635] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5633] write(3, "1000", 4 [pid 5635] <... prctl resumed>) = 0 [pid 5633] <... write resumed>) = 4 [pid 5635] setpgid(0, 0 [pid 5633] close(3 [pid 5635] <... setpgid resumed>) = 0 [pid 5631] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5635] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5636] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5633] <... close resumed>) = 0 [pid 5631] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5635] <... openat resumed>) = 3 [pid 5636] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5635] write(3, "1000", 4 [pid 5636] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5633] write(1, "executing program\n", 18 [pid 5635] <... write resumed>) = 4 executing program [pid 5635] close(3 [pid 5633] <... write resumed>) = 18 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5638 attached [pid 5635] <... close resumed>) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5637 attached [pid 5631] <... clone resumed>, child_tidptr=0x5555588616d0) = 5638 [pid 5638] set_robust_list(0x5555588616e0, 24 [pid 5635] write(1, "executing program\n", 18 [pid 5633] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC executing program [pid 5631] rt_sigprocmask(SIG_SETMASK, [] [pid 5638] <... set_robust_list resumed>) = 0 [pid 5637] set_robust_list(0x5555588616e0, 24 [pid 5631] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5638] rt_sigprocmask(SIG_SETMASK, [] [pid 5635] <... write resumed>) = 18 [pid 5636] <... clone resumed>, child_tidptr=0x5555588616d0) = 5637 [pid 5633] <... socket resumed>) = 3 [pid 5631] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5638] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5637] <... set_robust_list resumed>) = 0 [pid 5635] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5636] rt_sigprocmask(SIG_SETMASK, [] [pid 5631] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5638] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5637] rt_sigprocmask(SIG_SETMASK, [] [pid 5633] 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=524285, nlmsg_pid=4096}, "\x06\x00\x00\x00"], iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_CONFIRM|MSG_NOSIGNAL|MSG_MORE|MSG_ZEROCOPY}, MSG_PROBE|MSG_EOR|MSG_MORE|MSG_ZEROCOPY [pid 5631] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5638] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5637] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5635] <... socket resumed>) = 3 [pid 5636] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5638] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5637] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5635] 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=524285, nlmsg_pid=4096}, "\x06\x00\x00\x00"], iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_CONFIRM|MSG_NOSIGNAL|MSG_MORE|MSG_ZEROCOPY}, MSG_PROBE|MSG_EOR|MSG_MORE|MSG_ZEROCOPYci-upstream-net-kasan-gce/strace-static-x86_64: Process 5640 attached ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5639 attached [pid 5638] <... clone resumed>, child_tidptr=0x5555588616d0) = 5639 [pid 5637] <... prctl resumed>) = 0 [pid 5631] <... clone resumed>, child_tidptr=0x5555588616d0) = 5640 [pid 5637] setpgid(0, 0 [pid 5639] set_robust_list(0x5555588616e0, 24 [pid 5637] <... setpgid resumed>) = 0 [pid 5631] rt_sigprocmask(SIG_SETMASK, [] [pid 5640] set_robust_list(0x5555588616e0, 24 [pid 5638] rt_sigprocmask(SIG_SETMASK, [] [pid 5637] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5631] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5640] <... set_robust_list resumed>) = 0 [pid 5638] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5640] rt_sigprocmask(SIG_SETMASK, [] [pid 5639] <... set_robust_list resumed>) = 0 [pid 5637] <... openat resumed>) = 3 [pid 5640] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5639] rt_sigprocmask(SIG_SETMASK, [] [pid 5637] write(3, "1000", 4 [pid 5640] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5639] <... rt_sigprocmask resumed>, NULL, 8) = 0 executing program [pid 5637] <... write resumed>) = 4 [pid 5640] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5639] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5637] close(3 [pid 5639] <... prctl resumed>) = 0 [pid 5637] <... close resumed>) = 0 [pid 5639] setpgid(0, 0 [pid 5637] write(1, "executing program\n", 18 [pid 5639] <... setpgid resumed>) = 0 [pid 5637] <... write resumed>) = 18 [pid 5640] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5639] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5637] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5639] <... openat resumed>) = 3 [pid 5637] <... socket resumed>) = 3 [pid 5637] 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=524285, nlmsg_pid=4096}, "\x06\x00\x00\x00"], iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_CONFIRM|MSG_NOSIGNAL|MSG_MORE|MSG_ZEROCOPY}, MSG_PROBE|MSG_EOR|MSG_MORE|MSG_ZEROCOPYci-upstream-net-kasan-gce/strace-static-x86_64: Process 5643 attached [pid 5639] write(3, "1000", 4 [pid 5643] set_robust_list(0x5555588616e0, 24 [pid 5639] <... write resumed>) = 4 [pid 5640] <... clone resumed>, child_tidptr=0x5555588616d0) = 5643 [pid 5640] rt_sigprocmask(SIG_SETMASK, [] [pid 5639] close(3 [pid 5640] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5643] <... set_robust_list resumed>) = 0 [pid 5639] <... close resumed>) = 0 [pid 5643] rt_sigprocmask(SIG_SETMASK, [] [pid 5639] write(1, "executing program\n", 18 [pid 5643] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5639] <... write resumed>) = 18 [pid 5643] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5639] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5643] <... prctl resumed>) = 0 executing program [pid 5643] setpgid(0, 0 [pid 5639] <... socket resumed>) = 3 [pid 5643] <... setpgid resumed>) = 0 [pid 5639] 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=524285, nlmsg_pid=4096}, "\x06\x00\x00\x00"], iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_CONFIRM|MSG_NOSIGNAL|MSG_MORE|MSG_ZEROCOPY}, MSG_PROBE|MSG_EOR|MSG_MORE|MSG_ZEROCOPY [pid 5643] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5643] write(3, "1000", 4) = 4 [pid 5643] close(3) = 0 executing program [pid 5643] write(1, "executing program\n", 18) = 18 [pid 5643] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 [pid 5643] 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=524285, nlmsg_pid=4096}, "\x06\x00\x00\x00"], iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_CONFIRM|MSG_NOSIGNAL|MSG_MORE|MSG_ZEROCOPY}, MSG_PROBE|MSG_EOR|MSG_MORE|MSG_ZEROCOPY [pid 5633] <... sendmsg resumed>) = 20 [pid 5633] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 4 [ 91.972132][ T988] cfg80211: failed to load regulatory.db [ 286.523779][ T32] INFO: task syz-executor306:5637 blocked for more than 143 seconds. [ 286.523867][ T32] Not tainted syzkaller #0 [ 286.523918][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.523950][ T32] task:syz-executor306 state:D stack:27472 pid:5637 tgid:5637 ppid:5636 ** replaying previous printk message ** [ 286.523950][ T32] task:syz-executor306 state:D stack:27472 pid:5637 tgid:5637 ppid:5636 task_flags:0x400140 flags:0x00080002 [ 286.524114][ T32] Call Trace: [ 286.524143][ T32] [ 286.524172][ T32] __schedule+0x17d4/0x5820 [ 286.524279][ T32] ? __pfx___schedule+0x10/0x10 [ 286.524333][ T32] ? schedule+0x90/0x2b0 [ 286.524371][ T32] schedule+0x164/0x2b0 [ 286.524417][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.524450][ T32] __mutex_lock+0x7c1/0x1550 [ 286.524501][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.524551][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.524595][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.524641][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.524695][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.524733][ T32] ? do_syscall_64+0x166/0x520 [ 286.524803][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.524834][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.524886][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.524924][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.524958][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.525002][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.525061][ T32] ? __nla_parse+0x40/0x60 [ 286.525102][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.525135][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.525759][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.526440][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.526488][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.526519][ T32] ? security_capable+0x7e/0x2c0 [ 286.526575][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.526613][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.526649][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.526689][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.526715][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.526747][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.526787][ T32] ? down_read+0x2be/0x330 [ 286.526823][ T32] genl_rcv+0x28/0x40 [ 286.526851][ T32] netlink_unicast+0x7bd/0x940 [ 286.526885][ T32] netlink_sendmsg+0x813/0xb40 [ 286.526920][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.526954][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.526984][ T32] ? rcu_is_watching+0x16/0xb0 [ 286.527011][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.527035][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.527065][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.527093][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.527122][ T32] ? import_iovec+0x73/0xa0 [ 286.527187][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.527238][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.527285][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.527465][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.527510][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.527583][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.527659][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 286.527750][ T32] do_syscall_64+0x166/0x520 [ 286.531569][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.532227][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.532295][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.532369][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.532433][ T32] RIP: 0033:0x7f1ab200d6b9 [ 286.532490][ T32] RSP: 002b:00007fffe5c22408 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.532553][ T32] RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007f1ab200d6b9 [ 286.532594][ T32] RDX: 0000000004008090 RSI: 0000200000000040 RDI: 0000000000000003 [ 286.532644][ T32] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000009 [ 286.532684][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe5c22588 [ 286.532716][ T32] R13: 0000000000000002 R14: 00007fffe5c22430 R15: 00007fffe5c22420 [ 286.532806][ T32] [ 286.532837][ T32] INFO: task syz-executor306:5639 blocked for more than 143 seconds. [ 286.532879][ T32] Not tainted syzkaller #0 [ 286.532909][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.532945][ T32] task:syz-executor306 state:D stack:27368 pid:5639 tgid:5639 ppid:5638 task_flags:0x400140 flags:0x00080002 [ 286.533132][ T32] Call Trace: [ 286.533210][ T32] [ 286.533244][ T32] __schedule+0x17d4/0x5820 [ 286.533545][ T32] ? __pfx___schedule+0x10/0x10 [ 286.533647][ T32] ? schedule+0x90/0x2b0 [ 286.533721][ T32] schedule+0x164/0x2b0 [ 286.533799][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.533870][ T32] __mutex_lock+0x7c1/0x1550 [ 286.533956][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.534042][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.534113][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.534194][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.534272][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.534327][ T32] ? do_syscall_64+0x166/0x520 [ 286.534410][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.534502][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.534579][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.534701][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.534787][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.534873][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.534967][ T32] ? __nla_parse+0x40/0x60 [ 286.535018][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.535103][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.535222][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.535320][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.535381][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.535413][ T32] ? security_capable+0x7e/0x2c0 [ 286.535543][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.535654][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.535734][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.535838][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.535904][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.535988][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.536098][ T32] ? down_read+0x2be/0x330 [ 286.536180][ T32] genl_rcv+0x28/0x40 [ 286.536255][ T32] netlink_unicast+0x7bd/0x940 [ 286.536326][ T32] netlink_sendmsg+0x813/0xb40 [ 286.536405][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.536497][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.536587][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.536658][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.536737][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.536808][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.536894][ T32] ? import_iovec+0x73/0xa0 [ 286.537025][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.537089][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.537171][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.537350][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.537403][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.537472][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.537543][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 286.537714][ T32] do_syscall_64+0x166/0x520 [ 286.537846][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.537915][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.537992][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.538085][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.538164][ T32] RIP: 0033:0x7f1ab200d6b9 [ 286.538223][ T32] RSP: 002b:00007fffe5c22408 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.538325][ T32] RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007f1ab200d6b9 [ 286.538377][ T32] RDX: 0000000004008090 RSI: 0000200000000040 RDI: 0000000000000003 [ 286.538423][ T32] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000009 [ 286.538475][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe5c22588 [ 286.538513][ T32] R13: 0000000000000002 R14: 00007fffe5c22430 R15: 00007fffe5c22420 [ 286.538615][ T32] [ 286.538627][ T32] INFO: task syz-executor306:5643 blocked for more than 143 seconds. [ 286.538682][ T32] Not tainted syzkaller #0 [ 286.538708][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.538741][ T32] task:syz-executor306 state:D stack:27472 pid:5643 tgid:5643 ppid:5640 task_flags:0x400140 flags:0x00080002 [ 286.538932][ T32] Call Trace: [ 286.538956][ T32] [ 286.538993][ T32] __schedule+0x17d4/0x5820 [ 286.539170][ T32] ? __pfx___schedule+0x10/0x10 [ 286.539282][ T32] ? schedule+0x90/0x2b0 [ 286.539368][ T32] schedule+0x164/0x2b0 [ 286.539459][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.539557][ T32] __mutex_lock+0x7c1/0x1550 [ 286.539673][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.539788][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.539873][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.539982][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.540075][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.540170][ T32] ? do_syscall_64+0x166/0x520 [ 286.540252][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.540377][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.540455][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.540595][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.540674][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.540772][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.540878][ T32] ? __nla_parse+0x40/0x60 [ 286.540959][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.541049][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.541176][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.541294][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.541428][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.541518][ T32] ? security_capable+0x7e/0x2c0 [ 286.541642][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.541759][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.541858][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.542014][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.542097][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.542235][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.542354][ T32] ? down_read+0x2be/0x330 [ 286.542464][ T32] genl_rcv+0x28/0x40 [ 286.542565][ T32] netlink_unicast+0x7bd/0x940 [ 286.542663][ T32] netlink_sendmsg+0x813/0xb40 [ 286.542788][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.542892][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.542998][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.543079][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.543208][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.543301][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.543573][ T32] ? import_iovec+0x73/0xa0 [ 286.543692][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.543754][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.543834][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.544048][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.544127][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.544211][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.544305][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 286.544397][ T32] do_syscall_64+0x166/0x520 [ 286.544490][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.544552][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.544615][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.544715][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.544798][ T32] RIP: 0033:0x7f1ab200d6b9 [ 286.544850][ T32] RSP: 002b:00007fffe5c22408 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.544928][ T32] RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007f1ab200d6b9 [ 286.544975][ T32] RDX: 0000000004008090 RSI: 0000200000000040 RDI: 0000000000000003 [ 286.545019][ T32] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000009 [ 286.545056][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe5c22588 [ 286.545100][ T32] R13: 0000000000000002 R14: 00007fffe5c22430 R15: 00007fffe5c22420 [ 286.545214][ T32] [ 286.545247][ T32] INFO: task syz-executor306:5650 blocked for more than 143 seconds. [ 286.545295][ T32] Not tainted syzkaller #0 [ 286.545330][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.545356][ T32] task:syz-executor306 state:D stack:25704 pid:5650 tgid:5650 ppid:5632 task_flags:0x400140 flags:0x00080002 [ 286.545552][ T32] Call Trace: [ 286.545575][ T32] [ 286.545610][ T32] __schedule+0x17d4/0x5820 [ 286.545769][ T32] ? __pfx___schedule+0x10/0x10 [ 286.545887][ T32] ? schedule+0x90/0x2b0 [ 286.545964][ T32] schedule+0x164/0x2b0 [ 286.546063][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.546163][ T32] __mutex_lock+0x7c1/0x1550 [ 286.546271][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.546376][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.546461][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.546546][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.546648][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.546708][ T32] ? do_syscall_64+0x166/0x520 [ 286.546788][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.546891][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.546991][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.547107][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.547199][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.547298][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.547420][ T32] ? __nla_parse+0x40/0x60 [ 286.547511][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.547610][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.547720][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.547844][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.547971][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.548074][ T32] ? security_capable+0x7e/0x2c0 [ 286.548201][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.548318][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.548405][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.548532][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.548606][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.548724][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.548837][ T32] ? down_read+0x2be/0x330 [ 286.548948][ T32] genl_rcv+0x28/0x40 [ 286.549036][ T32] netlink_unicast+0x7bd/0x940 [ 286.549145][ T32] netlink_sendmsg+0x813/0xb40 [ 286.549202][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.549247][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.549284][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.549313][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.549347][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.549382][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.549419][ T32] ? import_iovec+0x73/0xa0 [ 286.549461][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.549486][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.549516][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.549665][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.549754][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.549843][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.549932][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 286.550033][ T32] do_syscall_64+0x166/0x520 [ 286.550129][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.550192][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.550265][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.550359][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.550429][ T32] RIP: 0033:0x7f1ab200d6b9 [ 286.550487][ T32] RSP: 002b:00007fffe5c22408 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.550566][ T32] RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007f1ab200d6b9 [ 286.550618][ T32] RDX: 0000000004008090 RSI: 0000200000000040 RDI: 0000000000000003 [ 286.550658][ T32] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000009 [ 286.550704][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000015106 [ 286.550749][ T32] R13: 00007fffe5c2241c R14: 00007fffe5c22430 R15: 00007fffe5c22420 [ 286.550844][ T32] [ 286.550947][ T32] [ 286.550947][ T32] Showing all locks held in the system: [ 286.550974][ T32] locks held by pr/ttyS0/16: 2, last CPU#0: [ 286.551017][ T32] #0: ffffffff8ec362b8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 [ 286.551230][ T32] #1: ffffffff9ad2aff8 (&port_lock_key){-...}-{3:3}, at: univ8250_console_device_lock+0x67/0xc0 [ 286.551411][ T32] locks held by khungtaskd/32: 1, last CPU#1: [ 286.551458][ T32] #0: ffffffff8ed5c6e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.551696][ T32] locks held by getty/5374: 2, on CPU#0: [ 286.551743][ T32] #0: ffff8880292cc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.551925][ T32] #1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 [ 286.552117][ T32] locks held by syz-executor306/5635: 2, on CPU#1: [ 286.552165][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.552342][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.552533][ T32] locks held by syz-executor306/5637: 2, on CPU#1: [ 286.552580][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.552765][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.552934][ T32] locks held by syz-executor306/5639: 2, on CPU#1: [ 286.552981][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.553171][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.553362][ T32] locks held by syz-executor306/5643: 2, on CPU#1: [ 286.553526][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.553712][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.553896][ T32] locks held by syz-executor306/5650: 2, on CPU#0: [ 286.553949][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.554144][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.554303][ T32] [ 286.554316][ T32] ============================================= [ 286.554316][ T32] [ 286.554387][ T32] NMI backtrace for cpu 1 [ 286.554477][ T32] CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) [ 286.554553][ T32] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.554588][ T32] Call Trace: [ 286.554612][ T32] [ 286.554629][ T32] dump_stack_lvl+0xe8/0x150 [ 286.554722][ T32] nmi_cpu_backtrace+0x274/0x2d0 [ 286.554828][ T32] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.554942][ T32] nmi_trigger_cpumask_backtrace+0x17d/0x390 [ 286.555025][ T32] sys_info+0x135/0x170 [ 286.555103][ T32] watchdog+0xfd7/0x1030 [ 286.555209][ T32] ? watchdog+0x1c7/0x1030 [ 286.555328][ T32] kthread+0x38b/0x480 [ 286.555406][ T32] ? __pfx_watchdog+0x10/0x10 [ 286.555456][ T32] ? __pfx_kthread+0x10/0x10 [ 286.555526][ T32] ret_from_fork+0x514/0xb70 [ 286.555632][ T32] ? __pfx_ret_from_fork+0x10/0x10 [ 286.555733][ T32] ? __switch_to+0xc89/0x1420 [ 286.555821][ T32] ? __pfx_kthread+0x10/0x10 [ 286.555888][ T32] ret_from_fork_asm+0x1a/0x30 [ 286.556038][ T32] [ 286.556062][ T32] Sending NMI from CPU 1 to CPUs 0: [ 286.556153][ C0] NMI backtrace for cpu 0 [ 286.556168][ C0] CPU: 0 UID: 0 PID: 16 Comm: pr/ttyS0 Not tainted syzkaller #0 PREEMPT(full) [ 286.556190][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.556202][ C0] RIP: 0010:io_serial_in+0x77/0xc0 [ 286.556235][ 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 [ 286.556253][ C0] RSP: 0018:ffffc900001578b8 EFLAGS: 00000002 [ 286.556271][ C0] RAX: 1ffffffff35a5600 RBX: 00000000000003fd RCX: 0000000000000000 [ 286.556285][ C0] RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020 [ 286.556297][ C0] RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004 [ 286.556311][ C0] R10: dffffc0000000000 R11: ffffffff85712fa0 R12: dffffc0000000000 [ 286.556326][ C0] R13: 0000000000000000 R14: ffffffff9ad2b020 R15: 0000000000000000 [ 286.556340][ C0] FS: 0000000000000000(0000) GS:ffff888124ce0000(0000) knlGS:0000000000000000 [ 286.556356][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.556370][ C0] CR2: 000055e70f6b40f0 CR3: 000000000eb48000 CR4: 00000000003526f0 [ 286.556389][ C0] Call Trace: [ 286.556396][ C0] [ 286.556405][ C0] wait_for_lsr+0x184/0x2f0 [ 286.556437][ C0] __serial8250_console_fifo_write+0xcd/0x3e0 [ 286.556464][ C0] serial8250_console_write+0xaa1/0x1200 [ 286.556493][ C0] ? lockdep_hardirqs_on+0x7b/0x110 [ 286.556525][ C0] ? __pfx_serial8250_console_write+0x10/0x10 [ 286.556553][ C0] ? __schedule+0x17ea/0x5820 [ 286.556586][ C0] nbcon_emit_next_record+0xef5/0x1a90 [ 286.556624][ C0] ? __pfx_nbcon_emit_next_record+0x10/0x10 [ 286.556651][ C0] ? nbcon_context_try_acquire+0x819/0xbd0 [ 286.556681][ C0] ? _raw_spin_lock_irqsave+0x4c/0x60 [ 286.556707][ C0] nbcon_kthread_func+0x679/0x880 [ 286.556732][ C0] ? nbcon_kthread_func+0x163/0x880 [ 286.556752][ C0] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 286.556777][ C0] ? __kthread_parkme+0x71/0x1f0 [ 286.556807][ C0] ? __kthread_parkme+0x199/0x1f0 [ 286.556839][ C0] kthread+0x38b/0x480 [ 286.556858][ C0] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 286.556877][ C0] ? __pfx_kthread+0x10/0x10 [ 286.556897][ C0] ret_from_fork+0x514/0xb70 [ 286.556930][ C0] ? __pfx_ret_from_fork+0x10/0x10 [ 286.556962][ C0] ? __switch_to+0xc89/0x1420 [ 286.556991][ C0] ? __pfx_kthread+0x10/0x10 [ 286.557011][ C0] ret_from_fork_asm+0x1a/0x30 [ 286.557052][ C0] [ 286.557181][ T32] Kernel panic - not syncing: hung_task: blocked tasks [ 288.604887][ T32] CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) [ 288.614025][ T32] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 288.624096][ T32] Call Trace: [ 288.627394][ T32] [ 288.630354][ T32] vpanic+0x56d/0xa60 [ 288.634381][ T32] ? __pfx_vpanic+0x10/0x10 [ 288.638917][ T32] ? console_srcu_read_unlock+0x3a/0x60 [ 288.644491][ T32] panic+0xc5/0xd0 [ 288.648246][ T32] ? __pfx_panic+0x10/0x10 [ 288.652695][ T32] ? wq_watchdog_touch+0xf9/0x160 [ 288.657744][ T32] ? nmi_trigger_cpumask_backtrace+0x24d/0x390 [ 288.663920][ T32] watchdog+0x1030/0x1030 [ 288.668274][ T32] ? watchdog+0x1c7/0x1030 [ 288.672715][ T32] kthread+0x38b/0x480 [ 288.676808][ T32] ? __pfx_watchdog+0x10/0x10 [ 288.681501][ T32] ? __pfx_kthread+0x10/0x10 [ 288.686112][ T32] ret_from_fork+0x514/0xb70 [ 288.690739][ T32] ? __pfx_ret_from_fork+0x10/0x10 [ 288.695884][ T32] ? __switch_to+0xc89/0x1420 [ 288.700588][ T32] ? __pfx_kthread+0x10/0x10 [ 288.705195][ T32] ret_from_fork_asm+0x1a/0x30 [ 288.710003][ T32] [ 288.713781][ T32] Kernel Offset: disabled [ 288.718123][ T32] Rebooting in 86400 seconds..