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-executor4151838298 <...> Warning: Permanently added '10.128.0.184' (ED25519) to the list of known hosts. execve("ci-upstream-net-this-kasan-gce/syz-executor4151838298", ["ci-upstream-net-this-kasan-gce/syz-executor4151838298"], 0x7ffeebd8e080 /* 10 vars */) = 0 brk(NULL) = 0x555564070000 brk(0x555564070d80) = 0x555564070d80 arch_prctl(ARCH_SET_FS, 0x555564070400) = 0 set_tid_address(0x5555640706d0) = 5655 set_robust_list(0x5555640706e0, 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-executor4151838298", 4096) = 59 getrandom("\xba\xa4\xf8\xcd\x31\xac\xa2\xf5", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555564070d80 brk(0x555564091d80) = 0x555564091d80 brk(0x555564092000) = 0x555564092000 mprotect(0x7fc288670000, 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 5656 attached , child_tidptr=0x5555640706d0) = 5656 [pid 5656] set_robust_list(0x5555640706e0, 24) = 0 [pid 5656] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5655] rt_sigprocmask(SIG_SETMASK, [] [pid 5656] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5655] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5655] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5656] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5655] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5655] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5657 attached [pid 5657] set_robust_list(0x5555640706e0, 24 [pid 5656] <... clone resumed>, child_tidptr=0x5555640706d0) = 5657 [pid 5656] rt_sigprocmask(SIG_SETMASK, [] [pid 5657] <... set_robust_list resumed>) = 0 ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5658 attached [pid 5657] rt_sigprocmask(SIG_SETMASK, [] [pid 5656] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5655] <... clone resumed>, child_tidptr=0x5555640706d0) = 5658 [pid 5658] set_robust_list(0x5555640706e0, 24 [pid 5657] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5657] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5655] rt_sigprocmask(SIG_SETMASK, [] [pid 5658] <... set_robust_list resumed>) = 0 [pid 5657] <... prctl resumed>) = 0 [pid 5655] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5655] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5655] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5658] rt_sigprocmask(SIG_SETMASK, [] [pid 5657] setpgid(0, 0 [pid 5658] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5657] <... setpgid resumed>) = 0 [pid 5658] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5657] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5658] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5657] <... openat resumed>) = 3 [pid 5658] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5659 attached [pid 5657] write(3, "1000", 4 [pid 5655] <... clone resumed>, child_tidptr=0x5555640706d0) = 5659 [pid 5655] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5659] set_robust_list(0x5555640706e0, 24 [pid 5657] <... write resumed>) = 4 [pid 5655] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5659] <... set_robust_list resumed>) = 0 executing program [pid 5657] close(3 [pid 5659] rt_sigprocmask(SIG_SETMASK, [] [pid 5657] <... close resumed>) = 0 [pid 5655] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5657] write(1, "executing program\n", 18 [pid 5655] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5659] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5657] <... write resumed>) = 18 ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5661 attached ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5660 attached [pid 5659] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5657] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5658] <... clone resumed>, child_tidptr=0x5555640706d0) = 5660 [pid 5655] <... clone resumed>, child_tidptr=0x5555640706d0) = 5661 [pid 5661] set_robust_list(0x5555640706e0, 24 [pid 5660] set_robust_list(0x5555640706e0, 24) = 0 [pid 5657] <... socket resumed>) = 3 [pid 5655] rt_sigprocmask(SIG_SETMASK, [] [pid 5661] <... set_robust_list resumed>) = 0 [pid 5660] rt_sigprocmask(SIG_SETMASK, [] [pid 5658] rt_sigprocmask(SIG_SETMASK, [] [pid 5655] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5661] rt_sigprocmask(SIG_SETMASK, [] [pid 5660] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5655] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5661] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5660] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5655] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5661] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5660] <... prctl resumed>) = 0 [pid 5659] <... rt_sigprocmask resumed>, [], 8) = 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=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] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5661] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5660] setpgid(0, 0 [pid 5659] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5658] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5660] <... setpgid resumed>) = 0 [pid 5661] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5660] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5662 attached ) = 3 [pid 5655] <... clone resumed>, child_tidptr=0x5555640706d0) = 5662 [pid 5660] write(3, "1000", 4 [pid 5655] rt_sigprocmask(SIG_SETMASK, [] [pid 5660] <... write resumed>) = 4 [pid 5655] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5662] set_robust_list(0x5555640706e0, 24 [pid 5660] close(3ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5663 attached [pid 5662] <... set_robust_list resumed>) = 0 [pid 5660] <... close resumed>) = 0 ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5664 attached [pid 5662] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5660] write(1, "executing program\n", 18 [pid 5664] set_robust_list(0x5555640706e0, 24 [pid 5662] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5661] <... clone resumed>, child_tidptr=0x5555640706d0) = 5664 [pid 5660] <... write resumed>) = 18 [pid 5664] <... set_robust_list resumed>) = 0 [pid 5660] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5664] rt_sigprocmask(SIG_SETMASK, [] [pid 5662] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5661] rt_sigprocmask(SIG_SETMASK, [] [pid 5660] <... socket resumed>) = 3 [pid 5664] <... rt_sigprocmask resumed>, NULL, 8) = 0 executing program [pid 5662] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5661] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5664] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5663] set_robust_list(0x5555640706e0, 24 [pid 5660] 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 5664] <... prctl resumed>) = 0 ci-upstream-net-this-kasan-gce/strace-static-x86_64: Process 5665 attached [pid 5664] setpgid(0, 0 [pid 5663] <... set_robust_list resumed>) = 0 [pid 5659] <... clone resumed>, child_tidptr=0x5555640706d0) = 5663 [pid 5664] <... setpgid resumed>) = 0 [pid 5662] <... clone resumed>, child_tidptr=0x5555640706d0) = 5665 [pid 5659] rt_sigprocmask(SIG_SETMASK, [] [pid 5663] rt_sigprocmask(SIG_SETMASK, [] [pid 5659] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5664] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5662] rt_sigprocmask(SIG_SETMASK, [] executing program [pid 5665] set_robust_list(0x5555640706e0, 24 [pid 5664] <... openat resumed>) = 3 [pid 5663] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5662] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5665] <... set_robust_list resumed>) = 0 [pid 5663] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5665] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5665] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5664] write(3, "1000", 4 [pid 5665] setpgid(0, 0 [pid 5664] <... write resumed>) = 4 [pid 5665] <... setpgid resumed>) = 0 [pid 5665] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5664] close(3) = 0 [pid 5664] write(1, "executing program\n", 18) = 18 [pid 5665] <... openat resumed>) = 3 [pid 5663] <... prctl resumed>) = 0 [pid 5664] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 [pid 5664] 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 5663] setpgid(0, 0 [pid 5665] write(3, "1000", 4) = 4 [pid 5665] close(3) = 0 [pid 5665] write(1, "executing program\n", 18 [pid 5663] <... setpgid resumed>) = 0 [pid 5665] <... write resumed>) = 18 [pid 5665] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 executing program [pid 5665] 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 5663] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5663] write(3, "1000", 4) = 4 [pid 5663] close(3) = 0 executing program [pid 5663] write(1, "executing program\n", 18) = 18 [pid 5663] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 [pid 5663] 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 5657] <... sendmsg resumed>) = 20 [pid 5657] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 4 [ 286.745147][ T31] INFO: task syz-executor415:5663 blocked for more than 143 seconds. [ 286.745188][ ** replaying previous printk message ** [ 286.745188][ T31] Not tainted syzkaller #0 [ 286.745217][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.745231][ T31] task:syz-executor415 state:D stack:27472 pid:5663 tgid:5663 ppid:5659 task_flags:0x400140 flags:0x00080002 [ 286.745300][ T31] Call Trace: [ 286.745313][ T31] [ 286.745331][ T31] __schedule+0x17db/0x58f0 [ 286.745465][ T31] ? __pfx___schedule+0x10/0x10 [ 286.745507][ T31] ? schedule+0x90/0x2b0 [ 286.745541][ T31] schedule+0x164/0x2b0 [ 286.745575][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.745607][ T31] __mutex_lock+0x7c1/0x1550 [ 286.745647][ T31] ? __mutex_lock+0x5d4/0x1550 [ 286.745684][ T31] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.745722][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 286.745755][ T31] ? __kasan_kmalloc+0x93/0xb0 [ 286.745791][ T31] ? __nla_validate_parse+0x2429/0x2d50 [ 286.745824][ T31] ? do_syscall_64+0x166/0x520 [ 286.745857][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.745891][ T31] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.745925][ T31] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.745968][ T31] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.745996][ T31] ? trace_kmalloc+0x2a/0xf0 [ 286.746033][ T31] ? __kmalloc_noprof+0x38c/0x720 [ 286.746070][ T31] ? __nla_parse+0x40/0x60 [ 286.746099][ T31] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.746132][ T31] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.746173][ T31] genl_family_rcv_msg_doit+0x233/0x340 [ 286.746218][ T31] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.746266][ T31] ? bpf_lsm_capable+0x9/0x20 [ 286.746296][ T31] ? security_capable+0x7e/0x2c0 [ 286.746328][ T31] genl_rcv_msg+0x614/0x7a0 [ 286.746376][ T31] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.746404][ T31] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.746434][ T31] netlink_rcv_skb+0x226/0x4a0 [ 286.746457][ T31] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.746485][ T31] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.746522][ T31] ? down_read+0x2be/0x330 [ 286.746544][ T31] genl_rcv+0x28/0x40 [ 286.746568][ T31] netlink_unicast+0x7bd/0x940 [ 286.746599][ T31] netlink_sendmsg+0x813/0xb40 [ 286.746630][ T31] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.746661][ T31] ? apparmor_socket_sendmsg+0x18b/0x360 [ 286.746686][ T31] ? rcu_is_watching+0x16/0xb0 [ 286.746709][ T31] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.746730][ T31] sock_sendmsg_nosec+0x13a/0x180 [ 286.746757][ T31] ____sys_sendmsg+0x54e/0x850 [ 286.746783][ T31] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.746813][ T31] ? import_iovec+0x73/0xa0 [ 286.746836][ T31] ___sys_sendmsg+0x2a5/0x360 [ 286.746856][ T31] ? __lock_acquire+0x6df/0x2e50 [ 286.746879][ T31] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.746948][ T31] __x64_sys_sendmsg+0x1b1/0x290 [ 286.746968][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.746992][ T31] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.747033][ T31] do_syscall_64+0x166/0x520 [ 286.747059][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.747077][ T31] ? clear_bhb_loop+0x70/0xc0 [ 286.747100][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.747119][ T31] RIP: 0033:0x7fc2885dd739 [ 286.747136][ T31] RSP: 002b:00007ffc0c3ac788 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.747157][ T31] RAX: ffffffffffffffda RBX: 0000200000000b80 RCX: 00007fc2885dd739 [ 286.747170][ T31] RDX: 0000000020040080 RSI: 0000200000000100 RDI: 0000000000000003 [ 286.747183][ T31] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 286.747194][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 286.747205][ T31] R13: 0000000000000000 R14: 00007ffc0c3ac7b0 R15: 00007ffc0c3ac7a0 [ 286.747235][ T31] [ 286.747244][ T31] INFO: task syz-executor415:5664 blocked for more than 143 seconds. [ 286.747258][ T31] Not tainted syzkaller #0 [ 286.747285][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.747293][ T31] task:syz-executor415 state:D stack:27472 pid:5664 tgid:5664 ppid:5661 task_flags:0x400140 flags:0x00080002 [ 286.747347][ T31] Call Trace: [ 286.747354][ T31] [ 286.747373][ T31] __schedule+0x17db/0x58f0 [ 286.747425][ T31] ? __pfx___schedule+0x10/0x10 [ 286.747458][ T31] ? schedule+0x90/0x2b0 [ 286.747485][ T31] schedule+0x164/0x2b0 [ 286.747512][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.747535][ T31] __mutex_lock+0x7c1/0x1550 [ 286.747566][ T31] ? __mutex_lock+0x5d4/0x1550 [ 286.747595][ T31] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.747618][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 286.747642][ T31] ? __kasan_kmalloc+0x93/0xb0 [ 286.747669][ T31] ? __nla_validate_parse+0x2429/0x2d50 [ 286.747687][ T31] ? do_syscall_64+0x166/0x520 [ 286.747712][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.747739][ T31] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.747765][ T31] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.747801][ T31] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.747822][ T31] ? trace_kmalloc+0x2a/0xf0 [ 286.747851][ T31] ? __kmalloc_noprof+0x38c/0x720 [ 286.747879][ T31] ? __nla_parse+0x40/0x60 [ 286.747903][ T31] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.747955][ T31] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.747991][ T31] genl_family_rcv_msg_doit+0x233/0x340 [ 286.748024][ T31] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.748063][ T31] ? bpf_lsm_capable+0x9/0x20 [ 286.748088][ T31] ? security_capable+0x7e/0x2c0 [ 286.748113][ T31] genl_rcv_msg+0x614/0x7a0 [ 286.748145][ T31] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.748171][ T31] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.748206][ T31] netlink_rcv_skb+0x226/0x4a0 [ 286.748229][ T31] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.748257][ T31] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.748293][ T31] ? down_read+0x2be/0x330 [ 286.748316][ T31] genl_rcv+0x28/0x40 [ 286.748340][ T31] netlink_unicast+0x7bd/0x940 [ 286.748383][ T31] netlink_sendmsg+0x813/0xb40 [ 286.748415][ T31] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.748445][ T31] ? apparmor_socket_sendmsg+0x18b/0x360 [ 286.748470][ T31] ? rcu_is_watching+0x16/0xb0 [ 286.748493][ T31] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.748514][ T31] sock_sendmsg_nosec+0x13a/0x180 [ 286.748540][ T31] ____sys_sendmsg+0x54e/0x850 [ 286.748566][ T31] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.748595][ T31] ? import_iovec+0x73/0xa0 [ 286.748618][ T31] ___sys_sendmsg+0x2a5/0x360 [ 286.748637][ T31] ? __lock_acquire+0x6df/0x2e50 [ 286.748659][ T31] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.748726][ T31] __x64_sys_sendmsg+0x1b1/0x290 [ 286.748746][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.748770][ T31] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.748798][ T31] ? do_user_addr_fault+0xc4c/0x1340 [ 286.748827][ T31] do_syscall_64+0x166/0x520 [ 286.748851][ T31] ? trace_irq_disable+0x3b/0x140 [ 286.748869][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.748887][ T31] ? clear_bhb_loop+0x70/0xc0 [ 286.748910][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.748928][ T31] RIP: 0033:0x7fc2885dd739 [ 286.748944][ T31] RSP: 002b:00007ffc0c3ac788 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.748963][ T31] RAX: ffffffffffffffda RBX: 0000200000000b80 RCX: 00007fc2885dd739 [ 286.748976][ T31] RDX: 0000000020040080 RSI: 0000200000000100 RDI: 0000000000000003 [ 286.748988][ T31] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 286.748999][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 286.749010][ T31] R13: 0000000000000000 R14: 00007ffc0c3ac7b0 R15: 00007ffc0c3ac7a0 [ 286.749040][ T31] [ 286.749047][ T31] INFO: task syz-executor415:5665 blocked for more than 143 seconds. [ 286.749061][ T31] Not tainted syzkaller #0 [ 286.749070][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.749077][ T31] task:syz-executor415 state:D stack:26944 pid:5665 tgid:5665 ppid:5662 task_flags:0x400140 flags:0x00080002 [ 286.749128][ T31] Call Trace: [ 286.749135][ T31] [ 286.749146][ T31] __schedule+0x17db/0x58f0 [ 286.749180][ T31] ? irqentry_exit+0x218/0x910 [ 286.749208][ T31] ? trace_irq_disable+0x3b/0x140 [ 286.749236][ T31] ? __pfx___schedule+0x10/0x10 [ 286.749269][ T31] ? schedule+0x90/0x2b0 [ 286.749296][ T31] schedule+0x164/0x2b0 [ 286.749323][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.749346][ T31] __mutex_lock+0x7c1/0x1550 [ 286.749384][ T31] ? __mutex_lock+0x5d4/0x1550 [ 286.749413][ T31] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.749436][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 286.749460][ T31] ? __kasan_kmalloc+0x93/0xb0 [ 286.749487][ T31] ? __nla_validate_parse+0x2429/0x2d50 [ 286.749505][ T31] ? do_syscall_64+0x166/0x520 [ 286.749529][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.749556][ T31] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.749582][ T31] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.749618][ T31] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.749638][ T31] ? trace_kmalloc+0x2a/0xf0 [ 286.749667][ T31] ? __kmalloc_noprof+0x38c/0x720 [ 286.749695][ T31] ? __nla_parse+0x40/0x60 [ 286.749719][ T31] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.749745][ T31] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.749779][ T31] genl_family_rcv_msg_doit+0x233/0x340 [ 286.749820][ T31] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.749859][ T31] ? bpf_lsm_capable+0x9/0x20 [ 286.749883][ T31] ? security_capable+0x7e/0x2c0 [ 286.749907][ T31] genl_rcv_msg+0x614/0x7a0 [ 286.749940][ T31] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.749965][ T31] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.750000][ T31] netlink_rcv_skb+0x226/0x4a0 [ 286.750022][ T31] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.750050][ T31] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.750087][ T31] ? down_read+0x2be/0x330 [ 286.750109][ T31] genl_rcv+0x28/0x40 [ 286.750133][ T31] netlink_unicast+0x7bd/0x940 [ 286.750164][ T31] netlink_sendmsg+0x813/0xb40 [ 286.750196][ T31] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.750226][ T31] ? apparmor_socket_sendmsg+0x18b/0x360 [ 286.750251][ T31] ? rcu_is_watching+0x16/0xb0 [ 286.750273][ T31] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.750294][ T31] sock_sendmsg_nosec+0x13a/0x180 [ 286.750321][ T31] ____sys_sendmsg+0x54e/0x850 [ 286.750346][ T31] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.750382][ T31] ? import_iovec+0x73/0xa0 [ 286.750405][ T31] ___sys_sendmsg+0x2a5/0x360 [ 286.750425][ T31] ? __lock_acquire+0x6df/0x2e50 [ 286.750447][ T31] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.750515][ T31] __x64_sys_sendmsg+0x1b1/0x290 [ 286.750534][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.750559][ T31] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.750586][ T31] ? do_user_addr_fault+0xc4c/0x1340 [ 286.750615][ T31] do_syscall_64+0x166/0x520 [ 286.750639][ T31] ? trace_irq_disable+0x3b/0x140 [ 286.750656][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.750674][ T31] ? clear_bhb_loop+0x70/0xc0 [ 286.750697][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.750715][ T31] RIP: 0033:0x7fc2885dd739 [ 286.750730][ T31] RSP: 002b:00007ffc0c3ac788 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.750748][ T31] RAX: ffffffffffffffda RBX: 0000200000000b80 RCX: 00007fc2885dd739 [ 286.750761][ T31] RDX: 0000000020040080 RSI: 0000200000000100 RDI: 0000000000000003 [ 286.750773][ T31] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 286.750784][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 286.750796][ T31] R13: 0000000000000000 R14: 00007ffc0c3ac7b0 R15: 00007ffc0c3ac7a0 [ 286.750825][ T31] [ 286.750833][ T31] INFO: task syz-executor415:5674 blocked for more than 143 seconds. [ 286.750846][ T31] Not tainted syzkaller #0 [ 286.750855][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.750862][ T31] task:syz-executor415 state:D stack:25872 pid:5674 tgid:5674 ppid:5656 task_flags:0x400140 flags:0x00080002 [ 286.750912][ T31] Call Trace: [ 286.750918][ T31] [ 286.750929][ T31] __schedule+0x17db/0x58f0 [ 286.750980][ T31] ? __pfx___schedule+0x10/0x10 [ 286.751013][ T31] ? schedule+0x90/0x2b0 [ 286.751040][ T31] schedule+0x164/0x2b0 [ 286.751065][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.751088][ T31] __mutex_lock+0x7c1/0x1550 [ 286.751119][ T31] ? __mutex_lock+0x5d4/0x1550 [ 286.751148][ T31] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.751170][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 286.751194][ T31] ? __kasan_kmalloc+0x93/0xb0 [ 286.751220][ T31] ? __nla_validate_parse+0x2429/0x2d50 [ 286.751239][ T31] ? do_syscall_64+0x166/0x520 [ 286.751263][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.751290][ T31] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.751316][ T31] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.751352][ T31] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.751380][ T31] ? trace_kmalloc+0x2a/0xf0 [ 286.751409][ T31] ? __kmalloc_noprof+0x38c/0x720 [ 286.751437][ T31] ? __nla_parse+0x40/0x60 [ 286.751461][ T31] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.751487][ T31] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.751520][ T31] genl_family_rcv_msg_doit+0x233/0x340 [ 286.751553][ T31] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.751591][ T31] ? bpf_lsm_capable+0x9/0x20 [ 286.751615][ T31] ? security_capable+0x7e/0x2c0 [ 286.751639][ T31] genl_rcv_msg+0x614/0x7a0 [ 286.751671][ T31] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.751697][ T31] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.751731][ T31] netlink_rcv_skb+0x226/0x4a0 [ 286.751754][ T31] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.751781][ T31] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.751818][ T31] ? down_read+0x2be/0x330 [ 286.751841][ T31] genl_rcv+0x28/0x40 [ 286.751864][ T31] netlink_unicast+0x7bd/0x940 [ 286.751895][ T31] netlink_sendmsg+0x813/0xb40 [ 286.751927][ T31] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.751957][ T31] ? apparmor_socket_sendmsg+0x18b/0x360 [ 286.751981][ T31] ? rcu_is_watching+0x16/0xb0 [ 286.752003][ T31] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.752024][ T31] sock_sendmsg_nosec+0x13a/0x180 [ 286.752051][ T31] ____sys_sendmsg+0x54e/0x850 [ 286.752076][ T31] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.752105][ T31] ? import_iovec+0x73/0xa0 [ 286.752128][ T31] ___sys_sendmsg+0x2a5/0x360 [ 286.752148][ T31] ? __lock_acquire+0x6df/0x2e50 [ 286.752169][ T31] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.752237][ T31] __x64_sys_sendmsg+0x1b1/0x290 [ 286.752257][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.752281][ T31] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.752309][ T31] ? do_user_addr_fault+0xc4c/0x1340 [ 286.752339][ T31] do_syscall_64+0x166/0x520 [ 286.752369][ T31] ? trace_irq_disable+0x3b/0x140 [ 286.752386][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.752405][ T31] ? clear_bhb_loop+0x70/0xc0 [ 286.752427][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.752446][ T31] RIP: 0033:0x7fc2885dd739 [ 286.752461][ T31] RSP: 002b:00007ffc0c3ac788 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.752479][ T31] RAX: ffffffffffffffda RBX: 0000200000000b80 RCX: 00007fc2885dd739 [ 286.752501][ T31] RDX: 0000000020040080 RSI: 0000200000000100 RDI: 0000000000000003 [ 286.752513][ T31] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 286.752524][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 286.752535][ T31] R13: 00007ffc0c3ac79c R14: 00007ffc0c3ac7b0 R15: 00007ffc0c3ac7a0 [ 286.752565][ T31] [ 286.752573][ T31] [ 286.752573][ T31] Showing all locks held in the system: [ 286.752582][ T31] locks held by pr/ttyS0/16: 2, last CPU#1: [ 286.752595][ T31] #0: ffffffff8ec362b8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 [ 286.752643][ T31] #1: ffffffff9ad32098 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x67/0xc0 [ 286.752694][ T31] locks held by khungtaskd/31: 1, last CPU#0: [ 286.752707][ T31] #0: ffffffff8ed5c6e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.752776][ T31] locks held by getty/5375: 2, on CPU#1: [ 286.752789][ T31] #0: ffff888035da40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.752837][ T31] #1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 [ 286.752882][ T31] locks held by syz-executor415/5660: 2, on CPU#0: [ 286.752895][ T31] #0: ffffffff902c1be8 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.752943][ T31] #1: ffffffff8f09e400 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.752991][ T31] locks held by syz-executor415/5663: 2, on CPU#1: [ 286.753005][ T31] #0: ffffffff902c1be8 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.753062][ T31] #1: ffffffff8f09e400 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.753110][ T31] locks held by syz-executor415/5664: 2, on CPU#0: [ 286.753123][ T31] #0: ffffffff902c1be8 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.753173][ T31] #1: ffffffff8f09e400 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.753219][ T31] locks held by syz-executor415/5665: 2, on CPU#0: [ 286.753232][ T31] #0: ffffffff902c1be8 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.753282][ T31] #1: ffffffff8f09e400 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.753328][ T31] locks held by syz-executor415/5674: 2, on CPU#0: [ 286.753341][ T31] #0: ffffffff902c1be8 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.753399][ T31] #1: ffffffff8f09e400 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.753446][ T31] [ 286.753451][ T31] ============================================= [ 286.753451][ T31] [ 286.753459][ T31] NMI backtrace for cpu 0 [ 286.753471][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) [ 286.753491][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.753500][ T31] Call Trace: [ 286.753508][ T31] [ 286.753515][ T31] dump_stack_lvl+0xe8/0x150 [ 286.753542][ T31] nmi_cpu_backtrace+0x274/0x2d0 [ 286.753564][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.753592][ T31] nmi_trigger_cpumask_backtrace+0x17d/0x390 [ 286.753617][ T31] sys_info+0x135/0x170 [ 286.753637][ T31] watchdog+0xfd7/0x1030 [ 286.753662][ T31] ? watchdog+0x1c7/0x1030 [ 286.753686][ T31] kthread+0x38b/0x480 [ 286.753704][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.753720][ T31] ? __pfx_kthread+0x10/0x10 [ 286.753739][ T31] ret_from_fork+0x514/0xb70 [ 286.753761][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.753787][ T31] ? __switch_to+0xc89/0x1420 [ 286.753814][ T31] ? __pfx_kthread+0x10/0x10 [ 286.753834][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.753873][ T31] [ 286.753880][ T31] Sending NMI from CPU 0 to CPUs 1: [ 286.753907][ C1] NMI backtrace for cpu 1 [ 286.753921][ C1] CPU: 1 UID: 0 PID: 16 Comm: pr/ttyS0 Not tainted syzkaller #0 PREEMPT(full) [ 286.753941][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.753951][ C1] RIP: 0010:delay_tsc+0x5d/0xd0 [ 286.753974][ C1] Code: 89 d7 49 c1 e7 20 49 09 c7 4d 29 f7 49 39 df 73 55 bf 01 00 00 00 e8 52 f6 b1 f5 65 48 8b 05 fa 88 b1 07 48 85 c0 74 1c f3 90 01 00 00 00 e8 e9 f4 b1 f5 e8 84 7a 01 00 39 c5 75 0e 0f 01 f9 [ 286.753989][ C1] RSP: 0018:ffffc900001578b8 EFLAGS: 00000082 [ 286.754005][ C1] RAX: 8000000000000001 RBX: 0000000000000899 RCX: ffffffff9a9db501 [ 286.754019][ C1] RDX: 0000000000000001 RSI: ffffffff8c6d9460 RDI: 00000000ffffffff [ 286.754031][ C1] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004 [ 286.754042][ C1] R10: dffffc0000000000 R11: ffffffff8be2e6c0 R12: 1ffffffff35a646d [ 286.754055][ C1] R13: 00000000ffffffff R14: 000000978ea0612d R15: 00000000000002e0 [ 286.754067][ C1] FS: 0000000000000000(0000) GS:ffff888124dd9000(0000) knlGS:0000000000000000 [ 286.754082][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.754095][ C1] CR2: 00007f19fbbbee9c CR3: 000000000eb48000 CR4: 00000000003526f0 [ 286.754112][ C1] Call Trace: [ 286.754120][ C1] [ 286.754127][ C1] wait_for_lsr+0x147/0x2f0 [ 286.754156][ C1] __serial8250_console_fifo_write+0x346/0x3e0 [ 286.754181][ C1] serial8250_console_write+0xaa1/0x1200 [ 286.754211][ C1] ? __pfx_serial8250_console_write+0x10/0x10 [ 286.754237][ C1] ? rcu_is_watching+0x16/0xb0 [ 286.754263][ C1] nbcon_emit_next_record+0xef5/0x1a90 [ 286.754288][ C1] ? __pfx_nbcon_emit_next_record+0x10/0x10 [ 286.754310][ C1] ? nbcon_context_try_acquire+0x819/0xbd0 [ 286.754335][ C1] ? _raw_spin_lock_irqsave+0x4c/0x60 [ 286.754358][ C1] nbcon_kthread_func+0x679/0x880 [ 286.754379][ C1] ? nbcon_kthread_func+0x163/0x880 [ 286.754397][ C1] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 286.754418][ C1] ? __kthread_parkme+0x71/0x1f0 [ 286.754443][ C1] ? __kthread_parkme+0x199/0x1f0 [ 286.754468][ C1] kthread+0x38b/0x480 [ 286.754485][ C1] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 286.754502][ C1] ? __pfx_kthread+0x10/0x10 [ 286.754519][ C1] ret_from_fork+0x514/0xb70 [ 286.754537][ C1] ? __pfx_ret_from_fork+0x10/0x10 [ 286.754563][ C1] ? __switch_to+0xc89/0x1420 [ 286.754587][ C1] ? __pfx_kthread+0x10/0x10 [ 286.754604][ C1] ret_from_fork_asm+0x1a/0x30 [ 286.754636][ C1] [ 286.754935][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 288.855843][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) [ 288.865348][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 288.875674][ T31] Call Trace: [ 288.879050][ T31] [ 288.881990][ T31] vpanic+0x56d/0xa60 [ 288.886079][ T31] ? __pfx_vpanic+0x10/0x10 [ 288.890690][ T31] ? console_srcu_read_unlock+0x3a/0x60 [ 288.896348][ T31] panic+0xc5/0xd0 [ 288.900085][ T31] ? __pfx_panic+0x10/0x10 [ 288.904692][ T31] ? wq_watchdog_touch+0xf9/0x160 [ 288.909901][ T31] ? nmi_trigger_cpumask_backtrace+0x24d/0x390 [ 288.916427][ T31] watchdog+0x1030/0x1030 [ 288.921031][ T31] ? watchdog+0x1c7/0x1030 [ 288.925474][ T31] kthread+0x38b/0x480 [ 288.930182][ T31] ? __pfx_watchdog+0x10/0x10 [ 288.935064][ T31] ? __pfx_kthread+0x10/0x10 [ 288.939766][ T31] ret_from_fork+0x514/0xb70 [ 288.944658][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 288.949983][ T31] ? __switch_to+0xc89/0x1420 [ 288.954773][ T31] ? __pfx_kthread+0x10/0x10 [ 288.959546][ T31] ret_from_fork_asm+0x1a/0x30 [ 288.964609][ T31] [ 288.968511][ T31] Kernel Offset: disabled [ 288.972854][ T31] Rebooting in 86400 seconds..