ci-upstream-net-this-kasan-gce/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci-upstream-net-this-kasan-gce/syz-executor2108924933 <...> Warning: Permanently added '10.128.1.48' (ED25519) to the list of known hosts. execve("ci-upstream-net-this-kasan-gce/syz-executor2108924933", ["ci-upstream-net-this-kasan-gce/syz-executor2108924933"], 0x7ffc0a546090 /* 10 vars */) = 0 brk(NULL) = 0x55556f12b000 brk(0x55556f12bd80) = 0x55556f12bd80 arch_prctl(ARCH_SET_FS, 0x55556f12b400) = 0 set_tid_address(0x55556f12b6d0) = 5652 set_robust_list(0x55556f12b6e0, 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-this-kasan-gce/syz-executor2108924933", 4096) = 59 getrandom("\x94\x68\xc8\xc9\x34\xe1\x16\xb6", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556f12bd80 brk(0x55556f14cd80) = 0x55556f14cd80 brk(0x55556f14d000) = 0x55556f14d000 mprotect(0x7f10dc3d4000, 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-this-kasan-gce/strace-static-x86_64: Process 5653 attached , child_tidptr=0x55556f12b6d0) = 5653 [pid 5652] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5652] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5653] set_robust_list(0x55556f12b6e0, 24 [pid 5652] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5653] <... set_robust_list resumed>) = 0 [pid 5652] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5653] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5654 attached [pid 5652] <... clone resumed>, child_tidptr=0x55556f12b6d0) = 5654 [pid 5653] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5652] rt_sigprocmask(SIG_SETMASK, [] [pid 5654] set_robust_list(0x55556f12b6e0, 24 [pid 5652] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5654] <... set_robust_list resumed>) = 0 [pid 5652] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5653] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5654] rt_sigprocmask(SIG_SETMASK, [] [pid 5653] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5652] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5654] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5652] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5654] rt_sigprocmask(SIG_BLOCK, ~[]ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5656 attached ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5655 attached [pid 5652] <... clone resumed>, child_tidptr=0x55556f12b6d0) = 5655 [pid 5656] set_robust_list(0x55556f12b6e0, 24 [pid 5655] set_robust_list(0x55556f12b6e0, 24 [pid 5654] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5653] <... clone resumed>, child_tidptr=0x55556f12b6d0) = 5656 [pid 5652] rt_sigprocmask(SIG_SETMASK, [] [pid 5656] <... set_robust_list resumed>) = 0 [pid 5655] <... set_robust_list resumed>) = 0 [pid 5654] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5653] rt_sigprocmask(SIG_SETMASK, [] [pid 5655] rt_sigprocmask(SIG_SETMASK, [] [pid 5652] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5656] rt_sigprocmask(SIG_SETMASK, [] [pid 5652] rt_sigprocmask(SIG_BLOCK, ~[]ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5657 attached , [], 8) = 0 [pid 5652] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5656] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5655] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5653] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5657] set_robust_list(0x55556f12b6e0, 24 [pid 5656] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5655] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5654] <... clone resumed>, child_tidptr=0x55556f12b6d0) = 5657 [pid 5656] <... prctl resumed>) = 0 [pid 5655] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5654] rt_sigprocmask(SIG_SETMASK, [] [pid 5656] setpgid(0, 0 [pid 5655] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5656] <... setpgid resumed>) = 0 [pid 5654] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5656] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5659 attached ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5658 attached [pid 5657] <... set_robust_list resumed>) = 0 [pid 5656] <... openat resumed>) = 3 [pid 5659] set_robust_list(0x55556f12b6e0, 24 [pid 5656] write(3, "1000", 4 [pid 5659] <... set_robust_list resumed>) = 0 [pid 5657] rt_sigprocmask(SIG_SETMASK, [] [pid 5656] <... write resumed>) = 4 [pid 5655] <... clone resumed>, child_tidptr=0x55556f12b6d0) = 5658 [pid 5658] set_robust_list(0x55556f12b6e0, 24 [pid 5659] rt_sigprocmask(SIG_SETMASK, [] [pid 5658] <... set_robust_list resumed>) = 0 [pid 5657] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5656] close(3 [pid 5655] rt_sigprocmask(SIG_SETMASK, [] [pid 5652] <... clone resumed>, child_tidptr=0x55556f12b6d0) = 5659 [pid 5659] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5657] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5656] <... close resumed>) = 0 [pid 5652] rt_sigprocmask(SIG_SETMASK, [] [pid 5658] rt_sigprocmask(SIG_SETMASK, [] [pid 5657] <... prctl resumed>) = 0 [pid 5656] write(1, "executing program\n", 18 [pid 5655] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5659] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5658] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5657] setpgid(0, 0 [pid 5652] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5657] <... setpgid resumed>) = 0 [pid 5656] <... write resumed>) = 18 [pid 5652] rt_sigprocmask(SIG_BLOCK, ~[] executing program [pid 5656] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5652] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5656] <... socket resumed>) = 3 [pid 5652] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5656] 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-this-kasan-gce/strace-static-x86_64: Process 5660 attached [pid 5659] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5658] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5657] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5652] <... clone resumed>, child_tidptr=0x55556f12b6d0) = 5660 [pid 5660] set_robust_list(0x55556f12b6e0, 24 [pid 5659] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5658] <... prctl resumed>) = 0 [pid 5657] <... openat resumed>) = 3 [pid 5652] rt_sigprocmask(SIG_SETMASK, [] [pid 5660] <... set_robust_list resumed>) = 0 ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5661 attached [pid 5652] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5660] rt_sigprocmask(SIG_SETMASK, [] [pid 5658] setpgid(0, 0 [pid 5657] write(3, "1000", 4 [pid 5661] set_robust_list(0x55556f12b6e0, 24 [pid 5660] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5659] <... clone resumed>, child_tidptr=0x55556f12b6d0) = 5661 [pid 5658] <... setpgid resumed>) = 0 [pid 5657] <... write resumed>) = 4 [pid 5661] <... set_robust_list resumed>) = 0 [pid 5660] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5659] rt_sigprocmask(SIG_SETMASK, [] [pid 5658] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5657] close(3 executing program [pid 5661] rt_sigprocmask(SIG_SETMASK, [] [pid 5660] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5659] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5658] <... openat resumed>) = 3 [pid 5657] <... close resumed>) = 0 [pid 5661] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5657] write(1, "executing program\n", 18 [pid 5661] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5660] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5658] write(3, "1000", 4 [pid 5657] <... write resumed>) = 18 [pid 5661] <... prctl resumed>) = 0 [pid 5658] <... write resumed>) = 4 [pid 5657] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5661] setpgid(0, 0 [pid 5658] close(3 [pid 5657] <... socket resumed>) = 3 [pid 5661] <... setpgid resumed>) = 0 [pid 5658] <... close resumed>) = 0 [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=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 5661] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC executing program [pid 5658] write(1, "executing program\n", 18) = 18 [pid 5658] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERICci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5662 attached [pid 5660] <... clone resumed>, child_tidptr=0x55556f12b6d0) = 5662 [pid 5658] <... socket resumed>) = 3 [pid 5662] set_robust_list(0x55556f12b6e0, 24 [pid 5661] <... openat resumed>) = 3 [pid 5660] rt_sigprocmask(SIG_SETMASK, [] [pid 5662] <... set_robust_list resumed>) = 0 [pid 5661] write(3, "1000", 4 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=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 5662] rt_sigprocmask(SIG_SETMASK, [] [pid 5661] <... write resumed>) = 4 [pid 5660] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5661] close(3) = 0 [pid 5662] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5661] write(1, "executing program\n", 18 [pid 5662] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5661] <... write resumed>) = 18 [pid 5661] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 [pid 5661] 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 5662] <... prctl resumed>) = 0 [pid 5662] setpgid(0, 0) = 0 [pid 5662] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5662] write(3, "1000", 4) = 4 [pid 5662] close(3) = 0 [pid 5662] write(1, "executing program\n", 18) = 18 [pid 5662] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 executing program [pid 5662] 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 5656] <... sendmsg resumed>) = 20 [pid 5656] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 4 [ 286.556530][ T32] INFO: task syz-executor210:5658 blocked for more than 143 seconds. [ 286.556593][ T32] Not tainted syzkaller #0 [ 286.558444][ ** replaying previous printk message ** [ 286.558444][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.558482][ T32] task:syz-executor210 state:D stack:27472 pid:5658 tgid:5658 ppid:5655 task_flags:0x400140 flags:0x00080002 [ 286.558556][ T32] Call Trace: [ 286.558567][ T32] [ 286.558579][ T32] __schedule+0x17d4/0x5820 [ 286.558653][ T32] ? __pfx___schedule+0x10/0x10 [ 286.558681][ T32] ? schedule+0x90/0x2b0 [ 286.558706][ T32] schedule+0x164/0x2b0 [ 286.558728][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.558749][ T32] __mutex_lock+0x7c1/0x1550 [ 286.558778][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.558804][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.558831][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.558853][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.558879][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.558897][ T32] ? do_syscall_64+0x166/0x520 [ 286.558918][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.558945][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.558970][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.559002][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.559021][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.559050][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.559078][ T32] ? __nla_parse+0x40/0x60 [ 286.559098][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.559124][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.559155][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.559187][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.559223][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.559253][ T32] ? security_capable+0x7e/0x2c0 [ 286.559289][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.559319][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.559341][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.559582][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.559605][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.559630][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.559664][ T32] ? down_read+0x2be/0x330 [ 286.559691][ T32] genl_rcv+0x28/0x40 [ 286.559713][ T32] netlink_unicast+0x7bd/0x940 [ 286.559741][ T32] netlink_sendmsg+0x813/0xb40 [ 286.559770][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.559798][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.559820][ T32] ? rcu_is_watching+0x16/0xb0 [ 286.559842][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.559861][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.559886][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.559918][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.559953][ T32] ? import_iovec+0x73/0xa0 [ 286.559982][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.560000][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.560021][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.560085][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.560102][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.560124][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.560149][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 286.560178][ T32] do_syscall_64+0x166/0x520 [ 286.560200][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.560217][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.560235][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.560257][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.560275][ T32] RIP: 0033:0x7f10dc3416b9 [ 286.560301][ T32] RSP: 002b:00007ffd40223538 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.560321][ T32] RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007f10dc3416b9 [ 286.560334][ T32] RDX: 0000000004008090 RSI: 0000200000000040 RDI: 0000000000000003 [ 286.560346][ T32] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000009 [ 286.560357][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd402236b8 [ 286.560368][ T32] R13: 0000000000000002 R14: 00007ffd40223560 R15: 00007ffd40223550 [ 286.560397][ T32] [ 286.560410][ T32] INFO: task syz-executor210:5661 blocked for more than 143 seconds. [ 286.560423][ T32] Not tainted syzkaller #0 [ 286.560432][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.560440][ T32] task:syz-executor210 state:D stack:27472 pid:5661 tgid:5661 ppid:5659 task_flags:0x400140 flags:0x00080002 [ 286.560497][ T32] Call Trace: [ 286.560504][ T32] [ 286.560514][ T32] __schedule+0x17d4/0x5820 [ 286.560561][ T32] ? __pfx___schedule+0x10/0x10 [ 286.560591][ T32] ? schedule+0x90/0x2b0 [ 286.560615][ T32] schedule+0x164/0x2b0 [ 286.560637][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.560659][ T32] __mutex_lock+0x7c1/0x1550 [ 286.560686][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.560713][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.560734][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.560756][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.560781][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.560797][ T32] ? do_syscall_64+0x166/0x520 [ 286.560818][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.560869][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.560895][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.560928][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.560948][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.560975][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.561003][ T32] ? __nla_parse+0x40/0x60 [ 286.561024][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.561048][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.561080][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.561110][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.561146][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.561170][ T32] ? security_capable+0x7e/0x2c0 [ 286.561201][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.561231][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.561254][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.561287][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.561307][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.561332][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.561366][ T32] ? down_read+0x2be/0x330 [ 286.561393][ T32] genl_rcv+0x28/0x40 [ 286.561415][ T32] netlink_unicast+0x7bd/0x940 [ 286.561442][ T32] netlink_sendmsg+0x813/0xb40 [ 286.561477][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.561505][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.561527][ T32] ? rcu_is_watching+0x16/0xb0 [ 286.561548][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.561567][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.561592][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.561624][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.561660][ T32] ? import_iovec+0x73/0xa0 [ 286.561689][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.561706][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.561726][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.561790][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.561806][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.561828][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.561853][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 286.561881][ T32] do_syscall_64+0x166/0x520 [ 286.561903][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.561919][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.561937][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.561959][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.561976][ T32] RIP: 0033:0x7f10dc3416b9 [ 286.561991][ T32] RSP: 002b:00007ffd40223538 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.562009][ T32] RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007f10dc3416b9 [ 286.562022][ T32] RDX: 0000000004008090 RSI: 0000200000000040 RDI: 0000000000000003 [ 286.562033][ T32] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000009 [ 286.562044][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd402236b8 [ 286.562055][ T32] R13: 0000000000000002 R14: 00007ffd40223560 R15: 00007ffd40223550 [ 286.562084][ T32] [ 286.562092][ T32] INFO: task syz-executor210:5662 blocked for more than 143 seconds. [ 286.562104][ T32] Not tainted syzkaller #0 [ 286.562113][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.562121][ T32] task:syz-executor210 state:D stack:27472 pid:5662 tgid:5662 ppid:5660 task_flags:0x400140 flags:0x00080002 [ 286.562171][ T32] Call Trace: [ 286.562176][ T32] [ 286.562187][ T32] __schedule+0x17d4/0x5820 [ 286.562233][ T32] ? __pfx___schedule+0x10/0x10 [ 286.562262][ T32] ? schedule+0x90/0x2b0 [ 286.562286][ T32] schedule+0x164/0x2b0 [ 286.562309][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.562330][ T32] __mutex_lock+0x7c1/0x1550 [ 286.562358][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.562384][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.562406][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.562428][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.562452][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.562479][ T32] ? do_syscall_64+0x166/0x520 [ 286.562500][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.562526][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.562552][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.562584][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.562605][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.562632][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.562660][ T32] ? __nla_parse+0x40/0x60 [ 286.562681][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.562706][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.562737][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.562768][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.562804][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.562827][ T32] ? security_capable+0x7e/0x2c0 [ 286.562858][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.562887][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.562910][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.562943][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.562963][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.562988][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.563021][ T32] ? down_read+0x2be/0x330 [ 286.563049][ T32] genl_rcv+0x28/0x40 [ 286.563071][ T32] netlink_unicast+0x7bd/0x940 [ 286.563099][ T32] netlink_sendmsg+0x813/0xb40 [ 286.563127][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.563155][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.563178][ T32] ? rcu_is_watching+0x16/0xb0 [ 286.563199][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.563217][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.563241][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.563273][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.563309][ T32] ? import_iovec+0x73/0xa0 [ 286.563337][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.563355][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.563376][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.563439][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.563455][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.563485][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.563510][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 286.563537][ T32] do_syscall_64+0x166/0x520 [ 286.563559][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.563575][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.563593][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.563615][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.563632][ T32] RIP: 0033:0x7f10dc3416b9 [ 286.563647][ T32] RSP: 002b:00007ffd40223538 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.563664][ T32] RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007f10dc3416b9 [ 286.563677][ T32] RDX: 0000000004008090 RSI: 0000200000000040 RDI: 0000000000000003 [ 286.563689][ T32] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000009 [ 286.563699][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd402236b8 [ 286.563711][ T32] R13: 0000000000000002 R14: 00007ffd40223560 R15: 00007ffd40223550 [ 286.563738][ T32] [ 286.563746][ T32] INFO: task syz-executor210:5671 blocked for more than 143 seconds. [ 286.563758][ T32] Not tainted syzkaller #0 [ 286.563767][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.563774][ T32] task:syz-executor210 state:D stack:26400 pid:5671 tgid:5671 ppid:5653 task_flags:0x400140 flags:0x00080002 [ 286.563821][ T32] Call Trace: [ 286.563827][ T32] [ 286.563837][ T32] __schedule+0x17d4/0x5820 [ 286.563884][ T32] ? __pfx___schedule+0x10/0x10 [ 286.563914][ T32] ? schedule+0x90/0x2b0 [ 286.563937][ T32] schedule+0x164/0x2b0 [ 286.563978][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.563999][ T32] __mutex_lock+0x7c1/0x1550 [ 286.564027][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.564052][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.564074][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.564096][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.564120][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.564136][ T32] ? do_syscall_64+0x166/0x520 [ 286.564157][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.564183][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.564209][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.564246][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.564266][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.564294][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.564322][ T32] ? __nla_parse+0x40/0x60 [ 286.564342][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.564367][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.564399][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.564430][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.564470][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.564494][ T32] ? security_capable+0x7e/0x2c0 [ 286.564526][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.564554][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.564578][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.564611][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.564631][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.564656][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.564690][ T32] ? down_read+0x2be/0x330 [ 286.564718][ T32] genl_rcv+0x28/0x40 [ 286.564740][ T32] netlink_unicast+0x7bd/0x940 [ 286.564767][ T32] netlink_sendmsg+0x813/0xb40 [ 286.564796][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.564830][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.564852][ T32] ? rcu_is_watching+0x16/0xb0 [ 286.564873][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.564892][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.564916][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.564942][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.564974][ T32] ? import_iovec+0x73/0xa0 [ 286.564999][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.565014][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.565036][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.565098][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.565117][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.565139][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.565168][ T32] ? do_user_addr_fault+0xc4c/0x1340 [ 286.565198][ T32] do_syscall_64+0x166/0x520 [ 286.565218][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.565233][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.565250][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.565271][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.565289][ T32] RIP: 0033:0x7f10dc3416b9 [ 286.565305][ T32] RSP: 002b:00007ffd40223538 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.565323][ T32] RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007f10dc3416b9 [ 286.565336][ T32] RDX: 0000000004008090 RSI: 0000200000000040 RDI: 0000000000000003 [ 286.565348][ T32] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000009 [ 286.565358][ T32] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000021b61 [ 286.565369][ T32] R13: 00007ffd4022354c R14: 00007ffd40223560 R15: 00007ffd40223550 [ 286.565399][ T32] [ 286.565416][ T32] [ 286.565416][ T32] Showing all locks held in the system: [ 286.565425][ T32] locks held by pr/ttyS0/16: 2, last CPU#1: [ 286.565437][ T32] #0: ffffffff8ec362b8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 [ 286.565492][ T32] #1: ffffffff9ad2bff8 (&port_lock_key){-...}-{3:3}, at: univ8250_console_device_lock+0x67/0xc0 [ 286.565538][ T32] locks held by khungtaskd/32: 1, last CPU#0: [ 286.565550][ T32] #0: ffffffff8ed5c6e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.565622][ T32] locks held by getty/5372: 2, on CPU#1: [ 286.565634][ T32] #0: ffff888031c140a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.565679][ T32] #1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 [ 286.565729][ T32] locks held by syz-executor210/5657: 2, on CPU#1: [ 286.565741][ T32] #0: ffffffff902c0a28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.565787][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.565831][ T32] locks held by syz-executor210/5658: 2, on CPU#0: [ 286.565843][ T32] #0: ffffffff902c0a28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.565889][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.565932][ T32] locks held by syz-executor210/5661: 2, on CPU#0: [ 286.565944][ T32] #0: ffffffff902c0a28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.565988][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.566031][ T32] locks held by syz-executor210/5662: 2, on CPU#1: [ 286.566044][ T32] #0: ffffffff902c0a28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.566089][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.566131][ T32] locks held by syz-executor210/5671: 2, on CPU#1: [ 286.566144][ T32] #0: ffffffff902c0a28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.566667][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.566715][ T32] [ 286.566720][ T32] ============================================= [ 286.566720][ T32] [ 286.566730][ T32] NMI backtrace for cpu 0 [ 286.566751][ T32] CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) [ 286.566770][ T32] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.566779][ T32] Call Trace: [ 286.566786][ T32] [ 286.566793][ T32] dump_stack_lvl+0xe8/0x150 [ 286.566818][ T32] nmi_cpu_backtrace+0x274/0x2d0 [ 286.566837][ T32] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.566866][ T32] nmi_trigger_cpumask_backtrace+0x17d/0x390 [ 286.566888][ T32] sys_info+0x135/0x170 [ 286.566903][ T32] watchdog+0xfd7/0x1030 [ 286.566926][ T32] ? watchdog+0x1c7/0x1030 [ 286.566949][ T32] kthread+0x38b/0x480 [ 286.566966][ T32] ? __pfx_watchdog+0x10/0x10 [ 286.566980][ T32] ? __pfx_kthread+0x10/0x10 [ 286.566998][ T32] ret_from_fork+0x514/0xb70 [ 286.567027][ T32] ? __pfx_ret_from_fork+0x10/0x10 [ 286.567053][ T32] ? __switch_to+0xc89/0x1420 [ 286.567079][ T32] ? __pfx_kthread+0x10/0x10 [ 286.567096][ T32] ret_from_fork_asm+0x1a/0x30 [ 286.567135][ T32] [ 286.567142][ T32] Sending NMI from CPU 0 to CPUs 1: [ 286.567172][ C1] NMI backtrace for cpu 1 [ 286.567183][ C1] CPU: 1 UID: 0 PID: 16 Comm: pr/ttyS0 Not tainted syzkaller #0 PREEMPT(full) [ 286.567204][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.567215][ C1] RIP: 0010:preempt_count_add+0x1e/0x140 [ 286.567245][ C1] Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 49 bf 00 00 00 00 00 fc ff df 48 63 c7 65 48 01 05 02 37 ff 11 <48> c7 c0 40 55 9d 9a 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 b8 00 [ 286.567262][ C1] RSP: 0018:ffffc90000157898 EFLAGS: 00000082 [ 286.567278][ C1] RAX: 0000000000000001 RBX: 0000000000000899 RCX: ffffffff9a9d5501 [ 286.567291][ C1] RDX: 0000000000000001 RSI: ffffffff8c6d8b60 RDI: 0000000000000001 [ 286.567304][ C1] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004 [ 286.567315][ C1] R10: dffffc0000000000 R11: ffffffff8be1d6c0 R12: 1ffffffff35a5859 [ 286.567329][ C1] R13: 00000000ffffffff R14: 000000998cc1b850 R15: dffffc0000000000 [ 286.567343][ C1] FS: 0000000000000000(0000) GS:ffff888124ddf000(0000) knlGS:0000000000000000 [ 286.567358][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.567372][ C1] CR2: 000055fac313c0d0 CR3: 000000000eb48000 CR4: 00000000003526f0 [ 286.567388][ C1] Call Trace: [ 286.567395][ C1] [ 286.567403][ C1] delay_tsc+0x67/0xd0 [ 286.567423][ C1] wait_for_lsr+0x147/0x2f0 [ 286.567451][ C1] __serial8250_console_fifo_write+0xcd/0x3e0 [ 286.567475][ C1] serial8250_console_write+0xaa1/0x1200 [ 286.567501][ C1] ? lockdep_hardirqs_on+0x7b/0x110 [ 286.567530][ C1] ? __pfx_serial8250_console_write+0x10/0x10 [ 286.567555][ C1] ? __schedule+0x17ea/0x5820 [ 286.567585][ C1] nbcon_emit_next_record+0xef5/0x1a90 [ 286.567613][ C1] ? __pfx_nbcon_emit_next_record+0x10/0x10 [ 286.567636][ C1] ? nbcon_context_try_acquire+0x819/0xbd0 [ 286.567663][ C1] ? _raw_spin_lock_irqsave+0x4c/0x60 [ 286.567686][ C1] nbcon_kthread_func+0x679/0x880 [ 286.567709][ C1] ? nbcon_kthread_func+0x163/0x880 [ 286.567727][ C1] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 286.567749][ C1] ? __kthread_parkme+0x71/0x1f0 [ 286.567777][ C1] ? __kthread_parkme+0x199/0x1f0 [ 286.567806][ C1] kthread+0x38b/0x480 [ 286.567823][ C1] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 286.567841][ C1] ? __pfx_kthread+0x10/0x10 [ 286.567859][ C1] ret_from_fork+0x514/0xb70 [ 286.567889][ C1] ? __pfx_ret_from_fork+0x10/0x10 [ 286.567918][ C1] ? __switch_to+0xc89/0x1420 [ 286.567945][ C1] ? __pfx_kthread+0x10/0x10 [ 286.567971][ C1] ret_from_fork_asm+0x1a/0x30 [ 286.568008][ C1] [ 286.570691][ T32] Kernel panic - not syncing: hung_task: blocked tasks [ 288.656552][ T32] CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) [ 288.665662][ T32] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 288.675845][ T32] Call Trace: [ 288.679125][ T32] [ 288.682074][ T32] vpanic+0x56d/0xa60 [ 288.686489][ T32] ? __pfx___schedule+0x10/0x10 [ 288.691335][ T32] ? __pfx_vpanic+0x10/0x10 [ 288.695871][ T32] panic+0xc5/0xd0 [ 288.699607][ T32] ? __pfx_panic+0x10/0x10 [ 288.704450][ T32] ? preempt_schedule_common+0x7f/0xd0 [ 288.709904][ T32] ? preempt_schedule_thunk+0x16/0x40 [ 288.715274][ T32] ? nmi_trigger_cpumask_backtrace+0x31a/0x390 [ 288.721431][ T32] ? nmi_trigger_cpumask_backtrace+0x31f/0x390 [ 288.728109][ T32] watchdog+0x1030/0x1030 [ 288.733068][ T32] ? watchdog+0x1c7/0x1030 [ 288.737495][ T32] kthread+0x38b/0x480 [ 288.741569][ T32] ? __pfx_watchdog+0x10/0x10 [ 288.746506][ T32] ? __pfx_kthread+0x10/0x10 [ 288.751118][ T32] ret_from_fork+0x514/0xb70 [ 288.755709][ T32] ? __pfx_ret_from_fork+0x10/0x10 [ 288.760813][ T32] ? __switch_to+0xc89/0x1420 [ 288.765487][ T32] ? __pfx_kthread+0x10/0x10 [ 288.770069][ T32] ret_from_fork_asm+0x1a/0x30 [ 288.774852][ T32] [ 288.778173][ T32] Kernel Offset: disabled [ 288.782508][ T32] Rebooting in 86400 seconds..