./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3084656741 <...> Warning: Permanently added '10.128.0.162' (ED25519) to the list of known hosts. execve("./syz-executor3084656741", ["./syz-executor3084656741"], 0x7ffd749f3640 /* 10 vars */) = 0 brk(NULL) = 0x55557a13c000 brk(0x55557a13cd40) = 0x55557a13cd40 arch_prctl(ARCH_SET_FS, 0x55557a13c3c0) = 0 set_tid_address(0x55557a13c690) = 5847 set_robust_list(0x55557a13c6a0, 24) = 0 rseq(0x55557a13cce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3084656741", 4096) = 28 getrandom("\x89\xf9\xac\x23\x3d\x21\x71\x97", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557a13cd40 brk(0x55557a15dd40) = 0x55557a15dd40 brk(0x55557a15e000) = 0x55557a15e000 mprotect(0x7f25cef2c000, 16384, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55557a13c690) = 5848 ./strace-static-x86_64: Process 5848 attached [pid 5847] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC [pid 5848] set_robust_list(0x55557a13c6a0, 24) = 0 [pid 5847] <... openat resumed>) = 3 [pid 5847] write(3, "10000000000", 11) = 11 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "20", 2) = 2 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "1", 1) = 1 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "0", 1) = 1 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "0", 1) = 1 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "1", 1) = 1 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "100", 3) = 3 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "0", 1) = 1 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "0", 1) = 1 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "7 4 1 3", 7) = 7 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "1", 1) = 1 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "1", 1) = 1 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "0", 1) = 1 [pid 5847] close(3) = 0 [pid 5847] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "5848", 4) = 4 [pid 5847] close(3) = 0 [pid 5847] kill(5848, SIGKILL) = 0 [pid 5848] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5848, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5849 attached , child_tidptr=0x55557a13c690) = 5849 [pid 5849] set_robust_list(0x55557a13c6a0, 24) = 0 [pid 5849] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5849] setpgid(0, 0) = 0 [pid 5849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "1000", 4) = 4 [pid 5849] close(3) = 0 executing program [pid 5849] write(1, "executing program\n", 18) = 18 [pid 5849] futex(0x7f25cef3230c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5849] rt_sigaction(SIGRT_1, {sa_handler=0x7f25ceece4d0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f25ceebfb50}, NULL, 8) = 0 [pid 5849] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f25cee41000 [pid 5849] mprotect(0x7f25cee42000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5849] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5849] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f25cee61990, parent_tid=0x7f25cee61990, exit_signal=0, stack=0x7f25cee41000, stack_size=0x20300, tls=0x7f25cee616c0}./strace-static-x86_64: Process 5850 attached => {parent_tid=[5850]}, 88) = 5850 [pid 5850] rseq(0x7f25cee61fe0, 0x20, 0, 0x53053053 [pid 5849] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5850] <... rseq resumed>) = 0 [pid 5849] futex(0x7f25cef32308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5850] set_robust_list(0x7f25cee619a0, 24 [pid 5849] <... futex resumed>) = 0 [pid 5850] <... set_robust_list resumed>) = 0 [pid 5850] rt_sigprocmask(SIG_SETMASK, [], [pid 5849] futex(0x7f25cef3230c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5850] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5850] mmap(0x200000000000, 11755520, PROT_WRITE|PROT_SEM|PROT_GROWSDOWN|PROT_GROWSUP, MAP_PRIVATE|MAP_FIXED|MAP_32BIT|MAP_LOCKED|MAP_STACK, -1, 0x93771000) = -1 EBADF (Bad file descriptor) [pid 5850] futex(0x7f25cef3230c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5850] futex(0x7f25cef32308, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5849] <... futex resumed>) = 0 [pid 5849] futex(0x7f25cef32308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5850] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5849] <... futex resumed>) = 0 [pid 5850] mremap(0x200000d59000, 4096, 4096, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x200000a91000 [pid 5849] futex(0x7f25cef3230c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5849] exit_group(0) = ? [ 92.026282][ T985] cfg80211: failed to load regulatory.db [pid 5847] kill(-5849, SIGKILL) = 0 [pid 5847] kill(5849, SIGKILL) = 0 [pid 5847] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5847] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5847] getdents64(3, 0x55557a13d730 /* 2 entries */, 32768) = 48 [pid 5847] getdents64(3, 0x55557a13d730 /* 0 entries */, 32768) = 0 [pid 5847] close(3) = 0 [ 252.024695][ T31] INFO: task syz-executor308:5849 blocked for more than 143 seconds. [ 252.032879][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 252.040644][ T31] Blocked by coredump. [ 252.045559][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 252.054342][ T31] task:syz-executor308 state:D stack:26920 pid:5849 tgid:5849 ppid:5847 task_flags:0x40004c flags:0x00004002 [ 252.067208][ T31] Call Trace: [ 252.070519][ T31] [ 252.073474][ T31] __schedule+0x1737/0x4d30 [ 252.079200][ T31] ? __lock_acquire+0xab9/0xd20 [ 252.084115][ T31] ? schedule+0x165/0x360 [ 252.088950][ T31] ? __lock_acquire+0xab9/0xd20 [ 252.093839][ T31] ? __pfx___schedule+0x10/0x10 [ 252.099248][ T31] ? schedule+0x91/0x360 [ 252.103566][ T31] schedule+0x165/0x360 [ 252.108240][ T31] schedule_preempt_disabled+0x13/0x30 [ 252.113831][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 252.120326][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 252.126400][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 252.132503][ T31] ? exit_mm+0xcc/0x2c0 [ 252.137190][ T31] ? __pfx_mm_release+0x10/0x10 [ 252.142077][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 252.147778][ T31] down_read+0x98/0x2e0 [ 252.151977][ T31] exit_mm+0xcc/0x2c0 [ 252.156561][ T31] ? __pfx_exit_mm+0x10/0x10 [ 252.161198][ T31] ? rcu_is_watching+0x15/0xb0 [ 252.166330][ T31] do_exit+0x648/0x2300 [ 252.170532][ T31] ? __pfx_do_exit+0x10/0x10 [ 252.175758][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 252.180993][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 252.186965][ T31] do_group_exit+0x21c/0x2d0 [ 252.191607][ T31] __x64_sys_exit_group+0x3f/0x40 [ 252.197501][ T31] x64_sys_call+0x21f7/0x2200 [ 252.202214][ T31] do_syscall_64+0xfa/0x3b0 [ 252.207179][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 252.212420][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 252.219015][ T31] ? clear_bhb_loop+0x60/0xb0 [ 252.223730][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 252.230077][ T31] RIP: 0033:0x7f25ceea65f9 [ 252.234858][ T31] RSP: 002b:00007ffd100448e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 252.243328][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f25ceea65f9 [ 252.251765][ T31] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 252.260091][ T31] RBP: 00007f25cef322b0 R08: ffffffffffffffb0 R09: 7fffffffffffffff [ 252.268430][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25cef322b0 [ 252.277910][ T31] R13: 0000000000000000 R14: 00007f25cef32e40 R15: 00007f25cee74380 [ 252.286334][ T31] [ 252.289450][ T31] [ 252.289450][ T31] Showing all locks held in the system: [ 252.297694][ T31] 1 lock held by khungtaskd/31: [ 252.302577][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 252.313463][ T31] 2 locks held by dhcpcd/5511: [ 252.325153][ T31] #0: ffff8880b8639f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 [ 252.335212][ T31] #1: ffff8880b8624008 (per_cpu_ptr(&psi_seq, cpu)){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 [ 252.345908][ T31] 2 locks held by getty/5605: [ 252.350604][ T31] #0: ffff88814d7660a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 252.360483][ T31] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 252.370739][ T31] 1 lock held by syz-executor308/5849: [ 252.376266][ T31] #0: ffff8880336281e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 252.385224][ T31] 1 lock held by syz-executor308/5850: [ 252.390702][ T31] 2 locks held by dhcpcd/5883: [ 252.395560][ T31] #0: ffff88805ffb0258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcd0 [ 252.405465][ T31] #1: ffffffff8e543338 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730 [ 252.423213][ T31] [ 252.426816][ T31] ============================================= [ 252.426816][ T31] [ 252.435369][ T31] NMI backtrace for cpu 1 [ 252.435393][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 252.435414][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 252.435426][ T31] Call Trace: [ 252.435433][ T31] [ 252.435441][ T31] dump_stack_lvl+0x189/0x250 [ 252.435476][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 252.435503][ T31] ? __pfx__printk+0x10/0x10 [ 252.435546][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 252.435575][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 252.435604][ T31] ? __pfx__printk+0x10/0x10 [ 252.435637][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 252.435664][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 252.435693][ T31] watchdog+0xf93/0xfe0 [ 252.435720][ T31] ? watchdog+0x1de/0xfe0 [ 252.435748][ T31] kthread+0x70e/0x8a0 [ 252.435782][ T31] ? __pfx_watchdog+0x10/0x10 [ 252.435803][ T31] ? __pfx_kthread+0x10/0x10 [ 252.435835][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 252.435862][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 252.435889][ T31] ? __pfx_kthread+0x10/0x10 [ 252.435920][ T31] ret_from_fork+0x3f9/0x770 [ 252.435949][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 252.435980][ T31] ? __switch_to_asm+0x39/0x70 [ 252.435997][ T31] ? __switch_to_asm+0x33/0x70 [ 252.436014][ T31] ? __pfx_kthread+0x10/0x10 [ 252.436044][ T31] ret_from_fork_asm+0x1a/0x30 [ 252.436079][ T31] [ 252.436086][ T31] Sending NMI from CPU 1 to CPUs 0: [ 252.585761][ C0] NMI backtrace for cpu 0 [ 252.585776][ C0] CPU: 0 UID: 0 PID: 5850 Comm: syz-executor308 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 252.585796][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 252.585806][ C0] RIP: 0010:__sanitizer_cov_trace_cmp8+0x18/0x90 [ 252.585827][ C0] Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 50 e7 92 65 8b 15 a8 4c 27 11 <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 3c 16 00 00 [ 252.585841][ C0] RSP: 0018:ffffc900040c7278 EFLAGS: 00000293 [ 252.585855][ C0] RAX: ffffffff8b782a4a RBX: 000000000000000c RCX: ffff888078d71e00 [ 252.585867][ C0] RDX: 0000000080000000 RSI: 00001fd4d15c3fff RDI: 00001fd4d15c2fff [ 252.585878][ C0] RBP: ffffc900040c7450 R08: ffff888078d71e00 R09: 0000000000000004 [ 252.585889][ C0] R10: 0000000000000003 R11: 0000000000000000 R12: ffff888074706a68 [ 252.585899][ C0] R13: 00001fd4d15c2fff R14: 00001fd4d15c3fff R15: 0000000000000001 [ 252.585910][ C0] FS: 00007f25cee616c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 [ 252.585923][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 252.585934][ C0] CR2: 00005591878bc168 CR3: 0000000075f0e000 CR4: 00000000003526f0 [ 252.585948][ C0] Call Trace: [ 252.585954][ C0] [ 252.585960][ C0] mt_validate+0xc5a/0x4380 [ 252.585992][ C0] ? __pfx_mt_validate+0x10/0x10 [ 252.586040][ C0] validate_mm+0xb6/0x4b0 [ 252.586065][ C0] ? __pfx_validate_mm+0x10/0x10 [ 252.586097][ C0] vma_link+0x366/0x450 [ 252.586122][ C0] ? __pfx_vma_link+0x10/0x10 [ 252.586149][ C0] ? anon_vma_clone+0x49b/0x4f0 [ 252.586167][ C0] ? anon_vma_name+0x87/0xf0 [ 252.586184][ C0] ? vm_area_dup+0x4f5/0x680 [ 252.586206][ C0] copy_vma+0x70c/0x940 [ 252.586234][ C0] ? __pfx_copy_vma+0x10/0x10 [ 252.586260][ C0] ? __pfx_move_page_tables+0x10/0x10 [ 252.586298][ C0] move_vma+0x81f/0x1840 [ 252.586320][ C0] ? __lock_acquire+0xab9/0xd20 [ 252.586346][ C0] ? arch_get_unmapped_area_topdown+0x251/0xbc0 [ 252.586369][ C0] ? __pfx_move_vma+0x10/0x10 [ 252.586395][ C0] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 252.586422][ C0] ? cap_mmap_addr+0xb0/0x100 [ 252.586443][ C0] ? bpf_lsm_mmap_addr+0x9/0x20 [ 252.586458][ C0] ? security_mmap_addr+0x71/0x270 [ 252.586482][ C0] mremap_to+0x6d6/0x7a0 [ 252.586509][ C0] ? __pfx_mremap_to+0x10/0x10 [ 252.586535][ C0] ? check_prep_vma+0x740/0xae0 [ 252.586563][ C0] __se_sys_mremap+0xa0b/0xef0 [ 252.586597][ C0] ? __pfx___se_sys_mremap+0x10/0x10 [ 252.586628][ C0] ? __pfx_ptrace_notify+0x10/0x10 [ 252.586654][ C0] ? __x64_sys_mremap+0x20/0xc0 [ 252.586678][ C0] do_syscall_64+0xfa/0x3b0 [ 252.586703][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 252.586719][ C0] ? __switch_to_asm+0x39/0x70 [ 252.586733][ C0] ? clear_bhb_loop+0x60/0xb0 [ 252.586751][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 252.586767][ C0] RIP: 0033:0x7f25ceea8599 [ 252.586781][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 [ 252.586794][ C0] RSP: 002b:00007f25cee61228 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 252.586809][ C0] RAX: ffffffffffffffda RBX: 00007f25cef32308 RCX: 00007f25ceea8599 [ 252.586820][ C0] RDX: 0000000000001000 RSI: 0000000000001000 RDI: 0000200000d59000 [ 252.586831][ C0] RBP: 00007f25cef32300 R08: 0000200000a91000 R09: 00007f25cee616c0 [ 252.586842][ C0] R10: 0000000000000007 R11: 0000000000000246 R12: 00007f25cef3230c [ 252.586852][ C0] R13: 0000200000d59000 R14: 0000200000000000 R15: 00007ffd10044868 [ 252.586872][ C0] [ 252.587983][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 252.955193][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 252.966484][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 252.976549][ T31] Call Trace: [ 252.979835][ T31] [ 252.982772][ T31] dump_stack_lvl+0x99/0x250 [ 252.987378][ T31] ? __asan_memcpy+0x40/0x70 [ 252.991980][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 252.997284][ T31] ? __pfx__printk+0x10/0x10 [ 253.001984][ T31] vpanic+0x281/0x750 [ 253.005979][ T31] ? __pfx_vpanic+0x10/0x10 [ 253.010487][ T31] ? __x2apic_send_IPI_mask+0x1e4/0x260 [ 253.016046][ T31] ? preempt_schedule+0xae/0xc0 [ 253.020909][ T31] ? preempt_schedule_common+0x83/0xd0 [ 253.026383][ T31] panic+0xb9/0xc0 [ 253.030114][ T31] ? __pfx_panic+0x10/0x10 [ 253.034543][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 253.039934][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 253.046098][ T31] watchdog+0xfd2/0xfe0 [ 253.050286][ T31] ? watchdog+0x1de/0xfe0 [ 253.054630][ T31] kthread+0x70e/0x8a0 [ 253.058747][ T31] ? __pfx_watchdog+0x10/0x10 [ 253.063501][ T31] ? __pfx_kthread+0x10/0x10 [ 253.068145][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 253.073373][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 253.078597][ T31] ? __pfx_kthread+0x10/0x10 [ 253.083227][ T31] ret_from_fork+0x3f9/0x770 [ 253.087829][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 253.092969][ T31] ? __switch_to_asm+0x39/0x70 [ 253.097752][ T31] ? __switch_to_asm+0x33/0x70 [ 253.102527][ T31] ? __pfx_kthread+0x10/0x10 [ 253.107146][ T31] ret_from_fork_asm+0x1a/0x30 [ 253.111944][ T31] [ 253.115391][ T31] Kernel Offset: disabled [ 253.119728][ T31] Rebooting in 86400 seconds..