ci-upstream-net-kasan-gce/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci-upstream-net-kasan-gce/syz-executor4135292595 <...> Warning: Permanently added '10.128.1.132' (ED25519) to the list of known hosts. execve("ci-upstream-net-kasan-gce/syz-executor4135292595", ["ci-upstream-net-kasan-gce/syz-executor4135292595"], 0x7ffc7a880780 /* 10 vars */) = 0 brk(NULL) = 0x555580f14000 brk(0x555580f14d80) = 0x555580f14d80 arch_prctl(ARCH_SET_FS, 0x555580f14400) = 0 set_tid_address(0x555580f146d0) = 5637 set_robust_list(0x555580f146e0, 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-executor4135292595", 4096) = 54 getrandom("\x3f\xd8\xce\x23\x8f\x31\xc6\x3a", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555580f14d80 brk(0x555580f35d80) = 0x555580f35d80 brk(0x555580f36000) = 0x555580f36000 mprotect(0x7f4157638000, 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 5638 attached , child_tidptr=0x555580f146d0) = 5638 [pid 5637] rt_sigprocmask(SIG_SETMASK, [] [pid 5638] set_robust_list(0x555580f146e0, 24) = 0 [pid 5638] rt_sigprocmask(SIG_SETMASK, [] [pid 5637] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5637] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5638] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5637] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5638] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5637] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5638] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5638] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDci-upstream-net-kasan-gce/strace-static-x86_64: Process 5639 attached [pid 5637] <... clone resumed>, child_tidptr=0x555580f146d0) = 5639 [pid 5637] rt_sigprocmask(SIG_SETMASK, [] [pid 5639] set_robust_list(0x555580f146e0, 24) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5640 attached [pid 5637] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5639] rt_sigprocmask(SIG_SETMASK, [] [pid 5638] <... clone resumed>, child_tidptr=0x555580f146d0) = 5640 [pid 5637] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5640] set_robust_list(0x555580f146e0, 24 [pid 5639] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5638] rt_sigprocmask(SIG_SETMASK, [] [pid 5637] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5640] <... set_robust_list resumed>) = 0 [pid 5639] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5638] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5637] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5640] rt_sigprocmask(SIG_SETMASK, [] [pid 5639] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5640] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5640] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5641 attached [pid 5640] setpgid(0, 0 [pid 5639] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5637] <... clone resumed>, child_tidptr=0x555580f146d0) = 5641 [pid 5641] set_robust_list(0x555580f146e0, 24 [pid 5640] <... setpgid resumed>) = 0 [pid 5637] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5637] rt_sigprocmask(SIG_BLOCK, ~[]ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5642 attached , [], 8) = 0 [pid 5641] <... set_robust_list resumed>) = 0 [pid 5640] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5637] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5642] set_robust_list(0x555580f146e0, 24 [pid 5641] rt_sigprocmask(SIG_SETMASK, [] [pid 5640] <... openat resumed>) = 3 [pid 5639] <... clone resumed>, child_tidptr=0x555580f146d0) = 5642 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5643 attached [pid 5642] <... set_robust_list resumed>) = 0 [pid 5641] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5639] rt_sigprocmask(SIG_SETMASK, [] [pid 5637] <... clone resumed>, child_tidptr=0x555580f146d0) = 5643 [pid 5643] set_robust_list(0x555580f146e0, 24 [pid 5641] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5640] write(3, "1000", 4 [pid 5637] rt_sigprocmask(SIG_SETMASK, [] [pid 5643] <... set_robust_list resumed>) = 0 [pid 5642] rt_sigprocmask(SIG_SETMASK, [] [pid 5641] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5640] <... write resumed>) = 4 [pid 5637] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5643] rt_sigprocmask(SIG_SETMASK, [] [pid 5642] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5641] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5640] close(3 [pid 5639] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5637] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5643] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5642] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5640] <... close resumed>) = 0 [pid 5643] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5640] write(1, "executing program\n", 18 [pid 5637] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5643] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5642] <... prctl resumed>) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5644 attached executing program [pid 5637] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5643] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5642] setpgid(0, 0 [pid 5640] <... write resumed>) = 18 [pid 5642] <... setpgid resumed>) = 0 [pid 5644] set_robust_list(0x555580f146e0, 24 [pid 5641] <... clone resumed>, child_tidptr=0x555580f146d0) = 5644 [pid 5644] <... set_robust_list resumed>) = 0 [pid 5641] rt_sigprocmask(SIG_SETMASK, [] [pid 5640] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTEci-upstream-net-kasan-gce/strace-static-x86_64: Process 5646 attached ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5645 attached [pid 5644] rt_sigprocmask(SIG_SETMASK, [] [pid 5642] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5637] <... clone resumed>, child_tidptr=0x555580f146d0) = 5646 [pid 5646] set_robust_list(0x555580f146e0, 24 [pid 5645] set_robust_list(0x555580f146e0, 24 [pid 5637] rt_sigprocmask(SIG_SETMASK, [] [pid 5646] <... set_robust_list resumed>) = 0 [pid 5644] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5645] <... set_robust_list resumed>) = 0 [pid 5643] <... clone resumed>, child_tidptr=0x555580f146d0) = 5645 [pid 5642] <... openat resumed>) = 3 [pid 5641] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5640] <... socket resumed>) = 3 [pid 5637] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5646] rt_sigprocmask(SIG_SETMASK, [] [pid 5645] rt_sigprocmask(SIG_SETMASK, [] [pid 5644] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5643] rt_sigprocmask(SIG_SETMASK, [] [pid 5642] write(3, "1000", 4 [pid 5646] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5646] rt_sigprocmask(SIG_BLOCK, ~[] [pid 5644] <... prctl resumed>) = 0 [pid 5645] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5643] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5642] <... write resumed>) = 4 [pid 5640] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=40, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|0x800, nlmsg_seq=0, nlmsg_pid=0}, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x08\x00\x1b\x00\x00\x00\x00\x00"], iov_len=40}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_DONTWAIT}, 0 [pid 5646] <... rt_sigprocmask resumed>, [], 8) = 0 [pid 5645] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5644] setpgid(0, 0 [pid 5642] close(3 [pid 5646] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5645] <... prctl resumed>) = 0 [pid 5644] <... setpgid resumed>) = 0 [pid 5642] <... close resumed>) = 0 ci-upstream-net-kasan-gce/strace-static-x86_64: Process 5647 attached [pid 5645] setpgid(0, 0 [pid 5644] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5642] write(1, "executing program\n", 18 [pid 5647] set_robust_list(0x555580f146e0, 24 [pid 5645] <... setpgid resumed>) = 0 [pid 5642] <... write resumed>) = 18 [pid 5647] <... set_robust_list resumed>) = 0 [pid 5645] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5644] <... openat resumed>) = 3 [pid 5642] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE [pid 5645] <... openat resumed>) = 3 [pid 5642] <... socket resumed>) = 3 executing program [pid 5647] rt_sigprocmask(SIG_SETMASK, [] [pid 5644] write(3, "1000", 4 [pid 5642] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=40, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|0x800, nlmsg_seq=0, nlmsg_pid=0}, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x08\x00\x1b\x00\x00\x00\x00\x00"], iov_len=40}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_DONTWAIT}, 0 [pid 5647] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 5646] <... clone resumed>, child_tidptr=0x555580f146d0) = 5647 [pid 5645] write(3, "1000", 4 [pid 5644] <... write resumed>) = 4 [pid 5646] rt_sigprocmask(SIG_SETMASK, [] [pid 5645] <... write resumed>) = 4 [pid 5646] <... rt_sigprocmask resumed>, NULL, 8) = 0 executing program [pid 5645] close(3) = 0 [pid 5647] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5645] write(1, "executing program\n", 18) = 18 [pid 5645] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE [pid 5644] close(3 [pid 5645] <... socket resumed>) = 3 [pid 5645] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=40, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|0x800, nlmsg_seq=0, nlmsg_pid=0}, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x08\x00\x1b\x00\x00\x00\x00\x00"], iov_len=40}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_DONTWAIT}, 0 [pid 5647] <... prctl resumed>) = 0 [pid 5644] <... close resumed>) = 0 [pid 5644] write(1, "executing program\n", 18 [pid 5647] setpgid(0, 0 [pid 5644] <... write resumed>) = 18 [pid 5647] <... setpgid resumed>) = 0 executing program [pid 5644] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE [pid 5647] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5644] <... socket resumed>) = 3 [pid 5644] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=40, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|0x800, nlmsg_seq=0, nlmsg_pid=0}, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x08\x00\x1b\x00\x00\x00\x00\x00"], iov_len=40}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_DONTWAIT}, 0 [pid 5647] <... openat resumed>) = 3 [pid 5647] write(3, "1000", 4) = 4 [pid 5647] close(3) = 0 executing program [pid 5647] write(1, "executing program\n", 18) = 18 [pid 5647] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 3 [ 92.019917][ T987] cfg80211: failed to load regulatory.db [ 286.572927][ T32] INFO: task syz-executor413:5642 blocked for more than 143 seconds. [ 286.573028][ T32] Not tainted syzkaller #0 [ 286.573087][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. ** replaying previous printk message ** [ 286.573087][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.573107][ T32] task:syz-executor413 state:D stack:26752 pid:5642 tgid:5642 ppid:5639 task_flags:0x400140 flags:0x00080002 [ 286.573386][ T32] Call Trace: [ 286.573419][ T32] [ 286.573460][ T32] __schedule+0x17d4/0x5820 [ 286.573665][ T32] ? __pfx___schedule+0x10/0x10 [ 286.573763][ T32] ? schedule+0x90/0x2b0 [ 286.573847][ T32] schedule+0x164/0x2b0 [ 286.573921][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.573993][ T32] __mutex_lock+0x7c1/0x1550 [ 286.574079][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.574169][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.574241][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.574305][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.574388][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.574440][ T32] ? do_syscall_64+0x166/0x520 [ 286.574521][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.574611][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.574708][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.574816][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.574886][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.574973][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.575060][ T32] ? __nla_parse+0x40/0x60 [ 286.575129][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.575212][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.575314][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.575417][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.575567][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.575652][ T32] ? security_capable+0x7e/0x2c0 [ 286.575757][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.575851][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.575932][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.576039][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.576125][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.576215][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.576319][ T32] ? down_read+0x2be/0x330 [ 286.576415][ T32] genl_rcv+0x28/0x40 [ 286.576487][ T32] netlink_unicast+0x7bd/0x940 [ 286.576580][ T32] netlink_sendmsg+0x813/0xb40 [ 286.576672][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.576766][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.576840][ T32] ? rcu_is_watching+0x16/0xb0 [ 286.576912][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.576974][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.577022][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.577081][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.577165][ T32] ? import_iovec+0x73/0xa0 [ 286.577259][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.577329][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.577401][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.577617][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.577670][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.577743][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.577855][ T32] do_syscall_64+0x166/0x520 [ 286.577928][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.577980][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.578034][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.578107][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.578168][ T32] RIP: 0033:0x7f41575a56b9 [ 286.578235][ T32] RSP: 002b:00007ffcb825c0b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.578297][ T32] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f41575a56b9 [ 286.578339][ T32] RDX: 0000000004008090 RSI: 0000200000000140 RDI: 0000000000000004 [ 286.578373][ T32] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 286.578417][ T32] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000 [ 286.578449][ T32] R13: 00007f415763d1e0 R14: 00007ffcb825c0e0 R15: 00007ffcb825c0d0 [ 286.578551][ T32] [ 286.578576][ T32] INFO: task syz-executor413:5644 blocked for more than 143 seconds. [ 286.578617][ T32] Not tainted syzkaller #0 [ 286.578648][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.578677][ T32] task:syz-executor413 state:D stack:26752 pid:5644 tgid:5644 ppid:5641 task_flags:0x400140 flags:0x00080002 [ 286.578856][ T32] Call Trace: [ 286.578883][ T32] [ 286.578921][ T32] __schedule+0x17d4/0x5820 [ 286.579061][ T32] ? __pfx___schedule+0x10/0x10 [ 286.579152][ T32] ? schedule+0x90/0x2b0 [ 286.579232][ T32] schedule+0x164/0x2b0 [ 286.579305][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.579377][ T32] __mutex_lock+0x7c1/0x1550 [ 286.579469][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.579559][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.579631][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.579703][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.579785][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.579836][ T32] ? do_syscall_64+0x166/0x520 [ 286.579908][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.579992][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.580069][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.580179][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.580249][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.580340][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.580432][ T32] ? __nla_parse+0x40/0x60 [ 286.580496][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.580596][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.580699][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.580799][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.580912][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.580994][ T32] ? security_capable+0x7e/0x2c0 [ 286.581093][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.581192][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.581222][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.581257][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.581282][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.581316][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.581357][ T32] ? down_read+0x2be/0x330 [ 286.581394][ T32] genl_rcv+0x28/0x40 [ 286.581423][ T32] netlink_unicast+0x7bd/0x940 [ 286.581455][ T32] netlink_sendmsg+0x813/0xb40 [ 286.581485][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.581521][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.581812][ T32] ? rcu_is_watching+0x16/0xb0 [ 286.581842][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.581868][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.581899][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.581928][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.581961][ T32] ? import_iovec+0x73/0xa0 [ 286.582000][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.582022][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.582048][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.582117][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.582139][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.582165][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.582205][ T32] do_syscall_64+0x166/0x520 [ 286.582234][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.582255][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.582279][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.582307][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.582330][ T32] RIP: 0033:0x7f41575a56b9 [ 286.582349][ T32] RSP: 002b:00007ffcb825c0b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.582373][ T32] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f41575a56b9 [ 286.582389][ T32] RDX: 0000000004008090 RSI: 0000200000000140 RDI: 0000000000000004 [ 286.582404][ T32] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 286.582417][ T32] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000 [ 286.582431][ T32] R13: 00007f415763d1e0 R14: 00007ffcb825c0e0 R15: 00007ffcb825c0d0 [ 286.582466][ T32] [ 286.582475][ T32] INFO: task syz-executor413:5645 blocked for more than 143 seconds. [ 286.582492][ T32] Not tainted syzkaller #0 [ 286.582512][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.582522][ T32] task:syz-executor413 state:D stack:26752 pid:5645 tgid:5645 ppid:5643 task_flags:0x400140 flags:0x00080002 [ 286.582589][ T32] Call Trace: [ 286.582600][ T32] [ 286.582657][ T32] __schedule+0x17d4/0x5820 [ 286.582715][ T32] ? __pfx___schedule+0x10/0x10 [ 286.582753][ T32] ? schedule+0x90/0x2b0 [ 286.582783][ T32] schedule+0x164/0x2b0 [ 286.582811][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.582839][ T32] __mutex_lock+0x7c1/0x1550 [ 286.582874][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.582909][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.582937][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.582967][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.582998][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.583020][ T32] ? do_syscall_64+0x166/0x520 [ 286.583047][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.583081][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.583114][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.583153][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.583180][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.583242][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.583279][ T32] ? __nla_parse+0x40/0x60 [ 286.583371][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.583482][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.583599][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.583701][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.583815][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.583890][ T32] ? security_capable+0x7e/0x2c0 [ 286.583980][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.584073][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.584148][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.584251][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.584323][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.584407][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.584520][ T32] ? down_read+0x2be/0x330 [ 286.584612][ T32] genl_rcv+0x28/0x40 [ 286.584694][ T32] netlink_unicast+0x7bd/0x940 [ 286.584792][ T32] netlink_sendmsg+0x813/0xb40 [ 286.584905][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.584988][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.585056][ T32] ? rcu_is_watching+0x16/0xb0 [ 286.585129][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.585191][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.585273][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.585345][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.585428][ T32] ? import_iovec+0x73/0xa0 [ 286.585532][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.585591][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.585657][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.585842][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.585903][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.585983][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.586089][ T32] do_syscall_64+0x166/0x520 [ 286.586176][ T32] ? trace_irq_disable+0x3b/0x140 [ 286.586237][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.586305][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.586377][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.586437][ T32] RIP: 0033:0x7f41575a56b9 [ 286.586488][ T32] RSP: 002b:00007ffcb825c0b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.586549][ T32] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f41575a56b9 [ 286.586591][ T32] RDX: 0000000004008090 RSI: 0000200000000140 RDI: 0000000000000004 [ 286.586631][ T32] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 286.586664][ T32] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000 [ 286.586702][ T32] R13: 00007f415763d1e0 R14: 00007ffcb825c0e0 R15: 00007ffcb825c0d0 [ 286.586787][ T32] [ 286.586809][ T32] INFO: task syz-executor413:5647 blocked for more than 143 seconds. [ 286.586854][ T32] Not tainted syzkaller #0 [ 286.586884][ T32] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.586906][ T32] task:syz-executor413 state:D stack:25384 pid:5647 tgid:5647 ppid:5646 task_flags:0x400140 flags:0x00080002 [ 286.587074][ T32] Call Trace: [ 286.587094][ T32] [ 286.587120][ T32] __schedule+0x17d4/0x5820 [ 286.587255][ T32] ? __pfx___schedule+0x10/0x10 [ 286.587347][ T32] ? schedule+0x90/0x2b0 [ 286.587427][ T32] schedule+0x164/0x2b0 [ 286.587509][ T32] schedule_preempt_disabled+0x13/0x30 [ 286.587588][ T32] __mutex_lock+0x7c1/0x1550 [ 286.587680][ T32] ? __mutex_lock+0x5d4/0x1550 [ 286.587774][ T32] ? nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.587838][ T32] ? __pfx___mutex_lock+0x10/0x10 [ 286.587897][ T32] ? __kasan_kmalloc+0x93/0xb0 [ 286.587977][ T32] ? __nla_validate_parse+0x2429/0x2d50 [ 286.588023][ T32] ? do_syscall_64+0x166/0x520 [ 286.588097][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.588184][ T32] nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.588244][ T32] ? __pfx___nla_validate_parse+0x10/0x10 [ 286.588304][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.588385][ T32] ? trace_kmalloc+0x2a/0xf0 [ 286.588510][ T32] ? __kmalloc_noprof+0x38c/0x720 [ 286.588604][ T32] ? __nla_parse+0x40/0x60 [ 286.588668][ T32] ? genl_family_rcv_msg_attrs_parse+0x20b/0x2f0 [ 286.588750][ T32] ? genl_family_rcv_msg_attrs_parse+0x265/0x2f0 [ 286.588853][ T32] genl_family_rcv_msg_doit+0x233/0x340 [ 286.588956][ T32] ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 [ 286.589063][ T32] ? bpf_lsm_capable+0x9/0x20 [ 286.589146][ T32] ? security_capable+0x7e/0x2c0 [ 286.589245][ T32] genl_rcv_msg+0x614/0x7a0 [ 286.589342][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.589425][ T32] ? __pfx_nfsd_nl_listener_set_doit+0x10/0x10 [ 286.589538][ T32] netlink_rcv_skb+0x226/0x4a0 [ 286.589602][ T32] ? __pfx_genl_rcv_msg+0x10/0x10 [ 286.589686][ T32] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 286.589804][ T32] ? down_read+0x2be/0x330 [ 286.589910][ T32] genl_rcv+0x28/0x40 [ 286.589984][ T32] netlink_unicast+0x7bd/0x940 [ 286.590072][ T32] netlink_sendmsg+0x813/0xb40 [ 286.590165][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.590249][ T32] ? apparmor_socket_sendmsg+0x98/0x360 [ 286.590316][ T32] ? rcu_is_watching+0x16/0xb0 [ 286.590387][ T32] ? __pfx_netlink_sendmsg+0x10/0x10 [ 286.590450][ T32] sock_sendmsg_nosec+0x13a/0x180 [ 286.590554][ T32] ____sys_sendmsg+0x54e/0x850 [ 286.590625][ T32] ? __pfx_____sys_sendmsg+0x10/0x10 [ 286.590708][ T32] ? import_iovec+0x73/0xa0 [ 286.590802][ T32] ___sys_sendmsg+0x2a5/0x360 [ 286.590855][ T32] ? __lock_acquire+0x6df/0x2e50 [ 286.590918][ T32] ? __pfx____sys_sendmsg+0x10/0x10 [ 286.591108][ T32] __x64_sys_sendmsg+0x1b1/0x290 [ 286.591175][ T32] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.591263][ T32] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 286.591372][ T32] do_syscall_64+0x166/0x520 [ 286.591452][ T32] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.591514][ T32] ? clear_bhb_loop+0x70/0xc0 [ 286.591586][ T32] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.591640][ T32] RIP: 0033:0x7f41575a56b9 [ 286.591691][ T32] RSP: 002b:00007ffcb825c0b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 286.591752][ T32] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f41575a56b9 [ 286.591793][ T32] RDX: 0000000004008090 RSI: 0000200000000140 RDI: 0000000000000004 [ 286.591826][ T32] RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000009 [ 286.591858][ T32] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000 [ 286.591896][ T32] R13: 00007f415763d1e0 R14: 00007ffcb825c0e0 R15: 00007ffcb825c0d0 [ 286.591981][ T32] [ 286.592016][ T32] [ 286.592016][ T32] Showing all locks held in the system: [ 286.592045][ T32] locks held by pr/ttyS0/16: 2, last CPU#0: [ 286.592086][ T32] #0: ffffffff8ec362b8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 [ 286.592243][ T32] #1: ffffffff9ad2aff8 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x67/0xc0 [ 286.592402][ T32] locks held by khungtaskd/32: 1, last CPU#1: [ 286.592443][ T32] #0: ffffffff8ed5c6e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.592794][ T32] locks held by getty/5370: 2, on CPU#0: [ 286.592835][ T32] #0: ffff888031e220a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.592993][ T32] #1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 [ 286.593167][ T32] locks held by syz-executor413/5640: 2, on CPU#0: [ 286.593210][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.593362][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.593506][ T32] locks held by syz-executor413/5642: 2, on CPU#0: [ 286.593544][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.593704][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.593849][ T32] locks held by syz-executor413/5644: 2, on CPU#0: [ 286.593891][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.594062][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.594198][ T32] locks held by syz-executor413/5645: 2, on CPU#0: [ 286.594239][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.594397][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.594545][ T32] locks held by syz-executor413/5647: 2, on CPU#0: [ 286.594586][ T32] #0: ffffffff902c0b28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 [ 286.594732][ T32] #1: ffffffff8f09e380 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x53d/0x1ab0 [ 286.594876][ T32] [ 286.594888][ T32] ============================================= [ 286.594888][ T32] [ 286.594919][ T32] NMI backtrace for cpu 1 [ 286.594966][ T32] CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) [ 286.595016][ T32] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.595054][ T32] Call Trace: [ 286.595075][ T32] [ 286.595096][ T32] dump_stack_lvl+0xe8/0x150 [ 286.595170][ T32] nmi_cpu_backtrace+0x274/0x2d0 [ 286.595231][ T32] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.595340][ T32] nmi_trigger_cpumask_backtrace+0x17d/0x390 [ 286.595427][ T32] sys_info+0x135/0x170 [ 286.595479][ T32] watchdog+0xfd7/0x1030 [ 286.595561][ T32] ? watchdog+0x1c7/0x1030 [ 286.595633][ T32] kthread+0x38b/0x480 [ 286.595687][ T32] ? __pfx_watchdog+0x10/0x10 [ 286.595737][ T32] ? __pfx_kthread+0x10/0x10 [ 286.595799][ T32] ret_from_fork+0x514/0xb70 [ 286.595895][ T32] ? __pfx_ret_from_fork+0x10/0x10 [ 286.595980][ T32] ? __switch_to+0xc89/0x1420 [ 286.596051][ T32] ? __pfx_kthread+0x10/0x10 [ 286.596110][ T32] ret_from_fork_asm+0x1a/0x30 [ 286.596236][ T32] [ 286.596256][ T32] Sending NMI from CPU 1 to CPUs 0: [ 286.596312][ C0] NMI backtrace for cpu 0 [ 286.596325][ C0] CPU: 0 UID: 0 PID: 16 Comm: pr/ttyS0 Not tainted syzkaller #0 PREEMPT(full) [ 286.596345][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 286.596356][ C0] RIP: 0010:io_serial_in+0x77/0xc0 [ 286.596385][ 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 [ 286.596401][ C0] RSP: 0018:ffffc900001578b8 EFLAGS: 00000002 [ 286.596417][ C0] RAX: 1ffffffff35a5600 RBX: 00000000000003fd RCX: 0000000000000000 [ 286.596430][ C0] RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020 [ 286.596441][ C0] RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004 [ 286.596453][ C0] R10: dffffc0000000000 R11: ffffffff85712fa0 R12: dffffc0000000000 [ 286.596466][ C0] R13: 0000000000000000 R14: ffffffff9ad2b020 R15: 0000000000000000 [ 286.596478][ C0] FS: 0000000000000000(0000) GS:ffff888124ce0000(0000) knlGS:0000000000000000 [ 286.596493][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.596507][ C0] CR2: 000055f99f2830c8 CR3: 000000007ee30000 CR4: 00000000003526f0 [ 286.596524][ C0] Call Trace: [ 286.596530][ C0] [ 286.596538][ C0] wait_for_lsr+0x184/0x2f0 [ 286.596567][ C0] __serial8250_console_fifo_write+0xcd/0x3e0 [ 286.596591][ C0] serial8250_console_write+0xaa1/0x1200 [ 286.596622][ C0] ? __pfx_serial8250_console_write+0x10/0x10 [ 286.596647][ C0] ? __schedule+0x17ea/0x5820 [ 286.596677][ C0] nbcon_emit_next_record+0xef5/0x1a90 [ 286.596705][ C0] ? __pfx_nbcon_emit_next_record+0x10/0x10 [ 286.596728][ C0] ? nbcon_context_try_acquire+0x819/0xbd0 [ 286.596755][ C0] ? _raw_spin_lock_irqsave+0x4c/0x60 [ 286.596778][ C0] nbcon_kthread_func+0x679/0x880 [ 286.596800][ C0] ? nbcon_kthread_func+0x163/0x880 [ 286.596817][ C0] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 286.596840][ C0] ? __kthread_parkme+0x71/0x1f0 [ 286.596867][ C0] ? __kthread_parkme+0x199/0x1f0 [ 286.596895][ C0] kthread+0x38b/0x480 [ 286.596912][ C0] ? __pfx_nbcon_kthread_func+0x10/0x10 [ 286.596929][ C0] ? __pfx_kthread+0x10/0x10 [ 286.596947][ C0] ret_from_fork+0x514/0xb70 [ 286.596976][ C0] ? __pfx_ret_from_fork+0x10/0x10 [ 286.597011][ C0] ? __switch_to+0xc89/0x1420 [ 286.597037][ C0] ? __pfx_kthread+0x10/0x10 [ 286.597055][ C0] ret_from_fork_asm+0x1a/0x30 [ 286.597091][ C0] [ 286.597327][ T32] Kernel panic - not syncing: hung_task: blocked tasks [ 288.635221][ T32] CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) [ 288.644431][ T32] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 288.654503][ T32] Call Trace: [ 288.657810][ T32] [ 288.660746][ T32] vpanic+0x56d/0xa60 [ 288.664744][ T32] ? __pfx_vpanic+0x10/0x10 [ 288.669255][ T32] ? console_srcu_read_unlock+0x3a/0x60 [ 288.674806][ T32] panic+0xc5/0xd0 [ 288.678532][ T32] ? __pfx_panic+0x10/0x10 [ 288.682958][ T32] ? wq_watchdog_touch+0xf9/0x160 [ 288.687990][ T32] ? nmi_trigger_cpumask_backtrace+0x24d/0x390 [ 288.694147][ T32] watchdog+0x1030/0x1030 [ 288.698483][ T32] ? watchdog+0x1c7/0x1030 [ 288.702905][ T32] kthread+0x38b/0x480 [ 288.707002][ T32] ? __pfx_watchdog+0x10/0x10 [ 288.711676][ T32] ? __pfx_kthread+0x10/0x10 [ 288.716264][ T32] ret_from_fork+0x514/0xb70 [ 288.720864][ T32] ? __pfx_ret_from_fork+0x10/0x10 [ 288.725982][ T32] ? __switch_to+0xc89/0x1420 [ 288.730678][ T32] ? __pfx_kthread+0x10/0x10 [ 288.735325][ T32] ret_from_fork_asm+0x1a/0x30 [ 288.740127][ T32] [ 288.743872][ T32] Kernel Offset: disabled [ 288.748216][ T32] Rebooting in 86400 seconds..