./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor464896548 <...> Warning: Permanently added '10.128.1.202' (ED25519) to the list of known hosts. execve("./syz-executor464896548", ["./syz-executor464896548"], 0x7ffee23c78a0 /* 10 vars */) = 0 brk(NULL) = 0x55558baa9000 brk(0x55558baa9d40) = 0x55558baa9d40 arch_prctl(ARCH_SET_FS, 0x55558baa93c0) = 0 set_tid_address(0x55558baa9690) = 5873 set_robust_list(0x55558baa96a0, 24) = 0 rseq(0x55558baa9ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor464896548", 4096) = 27 getrandom("\x93\x4f\x43\x45\x80\xae\x6f\x12", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558baa9d40 brk(0x55558bacad40) = 0x55558bacad40 brk(0x55558bacb000) = 0x55558bacb000 mprotect(0x7fe4bf4af000, 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./strace-static-x86_64: Process 5874 attached , child_tidptr=0x55558baa9690) = 5874 [pid 5874] set_robust_list(0x55558baa96a0, 24) = 0 [pid 5874] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5874] setpgid(0, 0) = 0 [pid 5874] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5874] write(3, "1000", 4) = 4 [pid 5874] close(3) = 0 [pid 5874] write(1, "executing program\n", 18executing program ) = 18 [pid 5874] futex(0x7fe4bf4b530c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5874] rt_sigaction(SIGRT_1, {sa_handler=0x7fe4bf451220, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fe4bf4428a0}, NULL, 8) = 0 [pid 5874] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5874] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fe4bf3c4000 [pid 5874] mprotect(0x7fe4bf3c5000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5874] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5874] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fe4bf3e4990, parent_tid=0x7fe4bf3e4990, exit_signal=0, stack=0x7fe4bf3c4000, stack_size=0x20300, tls=0x7fe4bf3e46c0}./strace-static-x86_64: Process 5875 attached => {parent_tid=[5875]}, 88) = 5875 [pid 5875] rseq(0x7fe4bf3e4fe0, 0x20, 0, 0x53053053 [pid 5874] rt_sigprocmask(SIG_SETMASK, [], [pid 5875] <... rseq resumed>) = 0 [pid 5874] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5875] set_robust_list(0x7fe4bf3e49a0, 24 [pid 5874] futex(0x7fe4bf4b5308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5875] <... set_robust_list resumed>) = 0 [pid 5875] rt_sigprocmask(SIG_SETMASK, [], [pid 5874] <... futex resumed>) = 0 [pid 5875] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5874] futex(0x7fe4bf4b530c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5875] ioctl(-1, UFFDIO_API, {api=0xaa, features=0}) = -1 EBADF (Bad file descriptor) [pid 5875] futex(0x7fe4bf4b530c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5874] <... futex resumed>) = 0 [pid 5875] futex(0x7fe4bf4b5308, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5874] futex(0x7fe4bf4b5308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5875] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5874] <... futex resumed>) = 0 [pid 5875] mremap(0x200000000000, 6291458, 6291458, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x200000a00000 [pid 5874] futex(0x7fe4bf4b530c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5874] exit_group(0) = ? [pid 5873] kill(-5874, SIGKILL) = 0 [pid 5873] kill(5874, SIGKILL) = 0 [pid 5873] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5873] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5873] getdents64(3, 0x55558baaa730 /* 2 entries */, 32768) = 48 [pid 5873] getdents64(3, 0x55558baaa730 /* 0 entries */, 32768) = 0 [pid 5873] close(3) = 0 [ 290.187235][ T31] INFO: task syz-executor464:5874 blocked for more than 143 seconds. [ 290.195381][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 290.203533][ T31] Blocked by coredump. [ 290.208472][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 290.217514][ T31] task:syz-executor464 state:D stack:26920 pid:5874 tgid:5874 ppid:5873 task_flags:0x40004c flags:0x00004002 [ 290.230929][ T31] Call Trace: [ 290.234238][ T31] [ 290.237672][ T31] __schedule+0x1737/0x4d30 [ 290.242320][ T31] ? __lock_acquire+0xab9/0xd20 [ 290.247761][ T31] ? schedule+0x165/0x360 [ 290.252123][ T31] ? __lock_acquire+0xab9/0xd20 [ 290.257477][ T31] ? __pfx___schedule+0x10/0x10 [ 290.262364][ T31] ? schedule+0x91/0x360 [ 290.266618][ T31] schedule+0x165/0x360 [ 290.271337][ T31] schedule_preempt_disabled+0x13/0x30 [ 290.277177][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 290.282739][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 290.288925][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 290.295012][ T31] ? exit_mm+0xcc/0x2c0 [ 290.299713][ T31] ? __pfx_mm_release+0x10/0x10 [ 290.304590][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 290.310267][ T31] down_read+0x98/0x2e0 [ 290.314439][ T31] exit_mm+0xcc/0x2c0 [ 290.318953][ T31] ? __pfx_exit_mm+0x10/0x10 [ 290.323662][ T31] ? rcu_is_watching+0x15/0xb0 [ 290.328932][ T31] do_exit+0x648/0x2300 [ 290.333131][ T31] ? __pfx_do_exit+0x10/0x10 [ 290.338659][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 290.343905][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 290.349570][ T31] do_group_exit+0x21c/0x2d0 [ 290.354186][ T31] __x64_sys_exit_group+0x3f/0x40 [ 290.359664][ T31] x64_sys_call+0x21f7/0x2200 [ 290.364396][ T31] do_syscall_64+0xfa/0x3b0 [ 290.369358][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 290.374576][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 290.381180][ T31] ? clear_bhb_loop+0x60/0xb0 [ 290.385877][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 290.392250][ T31] RIP: 0033:0x7fe4bf429349 [ 290.397129][ T31] RSP: 002b:00007ffd82179b48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 290.405575][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe4bf429349 [ 290.414081][ T31] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 290.422473][ T31] RBP: 00007fe4bf4b52b0 R08: ffffffffffffffb0 R09: 7fffffffffffffff [ 290.430811][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe4bf4b52b0 [ 290.439261][ T31] R13: 0000000000000000 R14: 00007fe4bf4b5e40 R15: 00007fe4bf3f7170 [ 290.448052][ T31] [ 290.451172][ T31] [ 290.451172][ T31] Showing all locks held in the system: [ 290.459485][ T31] 1 lock held by ksoftirqd/0/15: [ 290.464445][ T31] 1 lock held by khungtaskd/31: [ 290.469783][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 290.480104][ T31] 2 locks held by getty/5609: [ 290.484795][ T31] #0: ffff88814db7d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 290.495234][ T31] #1: ffffc9000331e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 290.505838][ T31] 1 lock held by syz-executor464/5874: [ 290.511608][ T31] #0: ffff88807ab62ce0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 290.520782][ T31] 1 lock held by syz-executor464/5875: [ 290.526315][ T31] [ 290.529061][ T31] ============================================= [ 290.529061][ T31] [ 290.537922][ T31] NMI backtrace for cpu 1 [ 290.537958][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 290.537982][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 290.537992][ T31] Call Trace: [ 290.538030][ T31] [ 290.538038][ T31] dump_stack_lvl+0x189/0x250 [ 290.538077][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 290.538099][ T31] ? __pfx__printk+0x10/0x10 [ 290.538137][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 290.538167][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 290.538189][ T31] ? __pfx__printk+0x10/0x10 [ 290.538214][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 290.538243][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 290.538269][ T31] watchdog+0xf93/0xfe0 [ 290.538308][ T31] ? watchdog+0x1de/0xfe0 [ 290.538330][ T31] kthread+0x70e/0x8a0 [ 290.538369][ T31] ? __pfx_watchdog+0x10/0x10 [ 290.538385][ T31] ? __pfx_kthread+0x10/0x10 [ 290.538408][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 290.538429][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 290.538449][ T31] ? __pfx_kthread+0x10/0x10 [ 290.538470][ T31] ret_from_fork+0x3f9/0x770 [ 290.538507][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 290.538532][ T31] ? __switch_to_asm+0x39/0x70 [ 290.538546][ T31] ? __switch_to_asm+0x33/0x70 [ 290.538559][ T31] ? __pfx_kthread+0x10/0x10 [ 290.538581][ T31] ret_from_fork_asm+0x1a/0x30 [ 290.538611][ T31] [ 290.538617][ T31] Sending NMI from CPU 1 to CPUs 0: [ 290.685962][ C0] NMI backtrace for cpu 0 [ 290.685982][ C0] CPU: 0 UID: 0 PID: 5875 Comm: syz-executor464 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 290.686000][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 290.686009][ C0] RIP: 0010:lockdep_hardirqs_on_prepare+0xb7/0x2a0 [ 290.686039][ C0] Code: a5 01 00 00 65 8b 05 a4 f0 49 11 85 c0 0f 85 c8 01 00 00 65 48 8b 1c 25 08 50 e7 92 48 8b 83 e0 0a 00 00 48 89 83 c8 0a 00 00 <48> c7 c7 e5 dd c7 8d e8 3d f3 e1 09 65 ff 05 a6 f3 49 11 83 bb e8 [ 290.686055][ C0] RSP: 0018:ffffc900043d7480 EFLAGS: 00000046 [ 290.686071][ C0] RAX: c8b901b50a67a6df RBX: ffff8880773c3c00 RCX: 8035f2d3d9c32000 [ 290.686082][ C0] RDX: 0000000000000000 RSI: ffffffff8c04d3e0 RDI: ffffffff8c04d3a0 [ 290.686093][ C0] RBP: ffffc900043d7550 R08: ffffffff8fe3cf37 R09: 1ffffffff1fc79e6 [ 290.686104][ C0] R10: dffffc0000000000 R11: fffffbfff1fc79e7 R12: dffffc0000000000 [ 290.686115][ C0] R13: 1ffff9200087aebc R14: ffffffff9a1a9718 R15: 1ffff9200087ae98 [ 290.686126][ C0] FS: 00007fe4bf3e46c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 [ 290.686139][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 290.686149][ C0] CR2: 000055b955f55168 CR3: 0000000011c7e000 CR4: 00000000003526f0 [ 290.686163][ C0] Call Trace: [ 290.686170][ C0] [ 290.686185][ C0] trace_hardirqs_on+0x28/0x40 [ 290.686219][ C0] _raw_spin_unlock_irqrestore+0x85/0x110 [ 290.686247][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 290.686263][ C0] ? debug_object_active_state+0xa4/0x260 [ 290.686318][ C0] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 290.686372][ C0] call_rcu+0xc3/0x9c0 [ 290.686396][ C0] ? __pfx_call_rcu+0x10/0x10 [ 290.686415][ C0] ? __phys_addr+0xd3/0x180 [ 290.686439][ C0] ? vms_complete_munmap_vmas+0x626/0x8a0 [ 290.686467][ C0] kmem_cache_free+0x309/0x400 [ 290.686487][ C0] vms_complete_munmap_vmas+0x626/0x8a0 [ 290.686511][ C0] do_vmi_align_munmap+0x358/0x420 [ 290.686537][ C0] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 290.686569][ C0] do_vmi_munmap+0x253/0x2e0 [ 290.686589][ C0] do_munmap+0xe1/0x140 [ 290.686609][ C0] ? __pfx_do_munmap+0x10/0x10 [ 290.686629][ C0] ? bpf_lsm_mmap_addr+0x9/0x20 [ 290.686659][ C0] ? security_mmap_addr+0x71/0x270 [ 290.686700][ C0] mremap_to+0x2df/0x7a0 [ 290.686725][ C0] ? __pfx_mremap_to+0x10/0x10 [ 290.686745][ C0] ? check_prep_vma+0x740/0xae0 [ 290.686767][ C0] __se_sys_mremap+0xa0b/0xef0 [ 290.686794][ C0] ? __pfx___se_sys_mremap+0x10/0x10 [ 290.686814][ C0] ? __pfx_ptrace_notify+0x10/0x10 [ 290.686841][ C0] ? __x64_sys_mremap+0x20/0xc0 [ 290.686859][ C0] do_syscall_64+0xfa/0x3b0 [ 290.686878][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 290.686896][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 290.686910][ C0] ? clear_bhb_loop+0x60/0xb0 [ 290.686926][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 290.686940][ C0] RIP: 0033:0x7fe4bf42b2e9 [ 290.686955][ 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 [ 290.686966][ C0] RSP: 002b:00007fe4bf3e4228 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 290.686981][ C0] RAX: ffffffffffffffda RBX: 00007fe4bf4b5308 RCX: 00007fe4bf42b2e9 [ 290.686991][ C0] RDX: 0000000000600002 RSI: 0000000000600002 RDI: 0000200000000000 [ 290.687001][ C0] RBP: 00007fe4bf4b5300 R08: 0000200000a00000 R09: 00007fe4bf3e46c0 [ 290.687011][ C0] R10: 0000000000000007 R11: 0000000000000246 R12: 00007fe4bf4b530c [ 290.687021][ C0] R13: 0000200000000000 R14: 00002000000000c0 R15: 00007ffd82179ac8 [ 290.687039][ C0] [ 290.687047][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.094 msecs [ 290.688533][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 290.688551][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 290.688571][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 290.688581][ T31] Call Trace: [ 290.688589][ T31] [ 290.688596][ T31] dump_stack_lvl+0x99/0x250 [ 290.688624][ T31] ? __asan_memcpy+0x40/0x70 [ 290.688665][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 290.688686][ T31] ? __pfx__printk+0x10/0x10 [ 290.688720][ T31] vpanic+0x281/0x750 [ 290.688741][ T31] ? __pfx_vpanic+0x10/0x10 [ 290.688758][ T31] ? preempt_schedule+0xae/0xc0 [ 290.688782][ T31] ? preempt_schedule_common+0x83/0xd0 [ 290.688808][ T31] panic+0xb9/0xc0 [ 290.688826][ T31] ? __pfx_panic+0x10/0x10 [ 290.688845][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 290.688878][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 290.688900][ T31] watchdog+0xfd2/0xfe0 [ 290.688925][ T31] ? watchdog+0x1de/0xfe0 [ 290.688947][ T31] kthread+0x70e/0x8a0 [ 290.688974][ T31] ? __pfx_watchdog+0x10/0x10 [ 290.688999][ T31] ? __pfx_kthread+0x10/0x10 [ 290.689023][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 290.689043][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 290.689063][ T31] ? __pfx_kthread+0x10/0x10 [ 290.689085][ T31] ret_from_fork+0x3f9/0x770 [ 290.689109][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 290.689133][ T31] ? __switch_to_asm+0x39/0x70 [ 290.689148][ T31] ? __switch_to_asm+0x33/0x70 [ 290.689162][ T31] ? __pfx_kthread+0x10/0x10 [ 290.689184][ T31] ret_from_fork_asm+0x1a/0x30 [ 290.689214][ T31] [ 291.210676][ T31] Kernel Offset: disabled [ 291.215028][ T31] Rebooting in 86400 seconds..