./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2944579277 <...> Warning: Permanently added '10.128.0.4' (ED25519) to the list of known hosts. execve("./syz-executor2944579277", ["./syz-executor2944579277"], 0x7ffe8b874c40 /* 10 vars */) = 0 brk(NULL) = 0x55558398d000 brk(0x55558398de00) = 0x55558398de00 arch_prctl(ARCH_SET_FS, 0x55558398d480) = 0 set_tid_address(0x55558398d750) = 5863 set_robust_list(0x55558398d760, 24) = 0 rseq(0x55558398dda0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2944579277", 4096) = 28 getrandom("\xe0\x88\x13\x1a\xcf\x5d\x77\xcc", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558398de00 brk(0x5555839aee00) = 0x5555839aee00 brk(0x5555839af000) = 0x5555839af000 mprotect(0x7fae9a9cf000, 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 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7fae9a916c10, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fae9a91e120}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fae9a916c10, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fae9a91e120}, NULL, 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55558398d750) = 5864 ./strace-static-x86_64: Process 5864 attached [pid 5864] set_robust_list(0x55558398d760, 24) = 0 [pid 5864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5864] setpgid(0, 0) = 0 [pid 5864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "1000", 4) = 4 [pid 5864] close(3) = 0 [pid 5864] write(1, "executing program\n", 18executing program ) = 18 [pid 5864] futex(0x7fae9a9d530c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5864] rt_sigaction(SIGRT_1, {sa_handler=0x7fae9a971540, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fae9a91e120}, NULL, 8) = 0 [pid 5864] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5864] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fae9a8e4000 [pid 5864] mprotect(0x7fae9a8e5000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5864] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5864] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fae9a904990, parent_tid=0x7fae9a904990, exit_signal=0, stack=0x7fae9a8e4000, stack_size=0x20240, tls=0x7fae9a9046c0}./strace-static-x86_64: Process 5865 attached => {parent_tid=[5865]}, 88) = 5865 [pid 5865] rseq(0x7fae9a904fe0, 0x20, 0, 0x53053053 [pid 5864] rt_sigprocmask(SIG_SETMASK, [], [pid 5865] <... rseq resumed>) = 0 [pid 5864] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5865] set_robust_list(0x7fae9a9049a0, 24 [pid 5864] futex(0x7fae9a9d5308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5865] <... set_robust_list resumed>) = 0 [pid 5864] <... futex resumed>) = 0 [pid 5865] rt_sigprocmask(SIG_SETMASK, [], [pid 5864] futex(0x7fae9a9d530c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5865] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5865] mremap(0x2000005ab000, 4096, 4096, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x200000ffe000 [pid 5864] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5864] exit_group(0) = ? [pid 5863] kill(-5864, SIGKILL) = 0 [pid 5863] kill(5864, SIGKILL) = 0 [pid 5863] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5863] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5863] getdents64(3, 0x55558398e7f0 /* 2 entries */, 32768) = 48 [pid 5863] getdents64(3, 0x55558398e7f0 /* 0 entries */, 32768) = 0 [pid 5863] close(3) = 0 [ 286.756851][ T31] INFO: task syz-executor294:5864 blocked for more than 143 seconds. [ 286.765224][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 286.772727][ T31] Blocked by coredump. [ 286.778249][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.787484][ T31] task:syz-executor294 state:D stack:26920 pid:5864 tgid:5864 ppid:5863 task_flags:0x40004c flags:0x00004002 [ 286.799986][ T31] Call Trace: [ 286.803392][ T31] [ 286.806753][ T31] __schedule+0x1737/0x4d30 [ 286.811495][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.816763][ T31] ? schedule+0x165/0x360 [ 286.821286][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.826641][ T31] ? __pfx___schedule+0x10/0x10 [ 286.831566][ T31] ? schedule+0x91/0x360 [ 286.836175][ T31] schedule+0x165/0x360 [ 286.840564][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.846496][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 286.852225][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 286.858557][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 286.865248][ T31] ? exit_mm+0xcc/0x2c0 [ 286.869473][ T31] ? __pfx_mm_release+0x10/0x10 [ 286.874745][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.880094][ T31] down_read+0x98/0x2e0 [ 286.884623][ T31] exit_mm+0xcc/0x2c0 [ 286.888830][ T31] ? __pfx_exit_mm+0x10/0x10 [ 286.893469][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.898735][ T31] do_exit+0x648/0x2300 [ 286.902960][ T31] ? __pfx_do_exit+0x10/0x10 [ 286.908113][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.913363][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.918909][ T31] do_group_exit+0x21c/0x2d0 [ 286.923569][ T31] __x64_sys_exit_group+0x3f/0x40 [ 286.928967][ T31] x64_sys_call+0x21f7/0x2200 [ 286.933699][ T31] do_syscall_64+0xfa/0x3b0 [ 286.938573][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.944111][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.950308][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.955490][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.961432][ T31] RIP: 0033:0x7fae9a949909 [ 286.966319][ T31] RSP: 002b:00007ffd1ac3aec8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 286.975497][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fae9a949909 [ 286.983600][ T31] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 286.992147][ T31] RBP: 00007fae9a9d52b0 R08: ffffffffffffffb0 R09: 7fffffffffffffff [ 287.000469][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fae9a9d52b0 [ 287.009011][ T31] R13: 0000000000000000 R14: 00007fae9a9d5e40 R15: 00007fae9a917220 [ 287.017393][ T31] [ 287.020552][ T31] [ 287.020552][ T31] Showing all locks held in the system: [ 287.028876][ T31] 1 lock held by khungtaskd/31: [ 287.034149][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 287.044479][ T31] 2 locks held by getty/5606: [ 287.049217][ T31] #0: ffff888033e830a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.059604][ T31] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 287.070175][ T31] 1 lock held by syz-executor294/5864: [ 287.076309][ T31] #0: ffff88807a8a01e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 287.085953][ T31] 1 lock held by syz-executor294/5865: [ 287.091536][ T31] [ 287.094458][ T31] ============================================= [ 287.094458][ T31] [ 287.103015][ T31] NMI backtrace for cpu 0 [ 287.103044][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.103068][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.103080][ T31] Call Trace: [ 287.103091][ T31] [ 287.103100][ T31] dump_stack_lvl+0x189/0x250 [ 287.103138][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.103167][ T31] ? __pfx__printk+0x10/0x10 [ 287.103242][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.103271][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.103299][ T31] ? __pfx__printk+0x10/0x10 [ 287.103331][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.103358][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.103385][ T31] watchdog+0xf93/0xfe0 [ 287.103412][ T31] ? watchdog+0x1de/0xfe0 [ 287.103439][ T31] kthread+0x70e/0x8a0 [ 287.103472][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.103492][ T31] ? __pfx_kthread+0x10/0x10 [ 287.103523][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.103549][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.103575][ T31] ? __pfx_kthread+0x10/0x10 [ 287.103605][ T31] ret_from_fork+0x3f9/0x770 [ 287.103633][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.103664][ T31] ? __switch_to_asm+0x39/0x70 [ 287.103680][ T31] ? __switch_to_asm+0x33/0x70 [ 287.103696][ T31] ? __pfx_kthread+0x10/0x10 [ 287.103726][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.103764][ T31] [ 287.247822][ T31] Sending NMI from CPU 0 to CPUs 1: [ 287.253095][ C1] NMI backtrace for cpu 1 [ 287.253114][ C1] CPU: 1 UID: 0 PID: 5865 Comm: syz-executor294 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.253135][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.253145][ C1] RIP: 0010:lock_is_held_type+0x10b/0x190 [ 287.253176][ C1] Code: 0f 95 c0 31 db 39 c5 0f 94 c3 eb 05 bb 01 00 00 00 48 c7 c7 67 b0 e5 8d e8 92 16 00 00 b8 ff ff ff ff 65 0f c1 05 f5 16 68 07 <83> f8 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 [ 287.253190][ C1] RSP: 0018:ffffc90003f77238 EFLAGS: 00000057 [ 287.253206][ C1] RAX: 0000000000000001 RBX: 0000000000000001 RCX: 1ffc87d248003f00 [ 287.253217][ C1] RDX: 0000000000000000 RSI: ffffffff8de5b067 RDI: ffffffff8c04d400 [ 287.253228][ C1] RBP: 00000000ffffffff R08: 0000000000000003 R09: 0000000000000004 [ 287.253239][ C1] R10: dffffc0000000000 R11: fffffbfff34924ec R12: 0000000000000246 [ 287.253250][ C1] R13: ffff88802c8a1e00 R14: ffff88807a8a01e0 R15: 0000000000000000 [ 287.253262][ C1] FS: 00007fae9a9046c0(0000) GS:ffff8881258ab000(0000) knlGS:0000000000000000 [ 287.253276][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.253287][ C1] CR2: 00005639b913d168 CR3: 000000005f53a000 CR4: 00000000003526f0 [ 287.253302][ C1] Call Trace: [ 287.253309][ C1] [ 287.253319][ C1] mt_validate+0x74f/0x4380 [ 287.253352][ C1] ? __pfx_mt_validate+0x10/0x10 [ 287.253393][ C1] validate_mm+0xb6/0x4b0 [ 287.253420][ C1] ? __pfx_validate_mm+0x10/0x10 [ 287.253453][ C1] vma_link+0x366/0x450 [ 287.253479][ C1] ? __pfx_vma_link+0x10/0x10 [ 287.253506][ C1] ? anon_vma_clone+0x49b/0x4f0 [ 287.253525][ C1] ? anon_vma_name+0x87/0xf0 [ 287.253543][ C1] ? vm_area_dup+0x4f5/0x680 [ 287.253566][ C1] copy_vma+0x70c/0x940 [ 287.253594][ C1] ? __pfx_copy_vma+0x10/0x10 [ 287.253622][ C1] ? __pfx_move_page_tables+0x10/0x10 [ 287.253660][ C1] move_vma+0x81f/0x1840 [ 287.253682][ C1] ? __lock_acquire+0xab9/0xd20 [ 287.253711][ C1] ? arch_get_unmapped_area_topdown+0x251/0xbc0 [ 287.253739][ C1] ? __pfx_move_vma+0x10/0x10 [ 287.253765][ C1] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 287.253795][ C1] ? cap_mmap_addr+0xb0/0x100 [ 287.253817][ C1] ? bpf_lsm_mmap_addr+0x9/0x20 [ 287.253833][ C1] ? security_mmap_addr+0x71/0x270 [ 287.253858][ C1] mremap_to+0x6d6/0x7a0 [ 287.253886][ C1] ? __pfx_mremap_to+0x10/0x10 [ 287.253912][ C1] ? check_prep_vma+0x740/0xae0 [ 287.253942][ C1] __se_sys_mremap+0xa0b/0xef0 [ 287.253983][ C1] ? __pfx___se_sys_mremap+0x10/0x10 [ 287.254011][ C1] ? __pfx_ptrace_notify+0x10/0x10 [ 287.254039][ C1] ? __x64_sys_mremap+0x20/0xc0 [ 287.254063][ C1] do_syscall_64+0xfa/0x3b0 [ 287.254089][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.254105][ C1] ? __switch_to_asm+0x39/0x70 [ 287.254120][ C1] ? clear_bhb_loop+0x60/0xb0 [ 287.254139][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.254154][ C1] RIP: 0033:0x7fae9a94b8a9 [ 287.254169][ C1] 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 [ 287.254182][ C1] RSP: 002b:00007fae9a904178 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 287.254198][ C1] RAX: ffffffffffffffda RBX: 00007fae9a9d5308 RCX: 00007fae9a94b8a9 [ 287.254211][ C1] RDX: 0000000000001000 RSI: 0000000000001000 RDI: 00002000005ab000 [ 287.254222][ C1] RBP: 00007fae9a9d5300 R08: 0000200000ffe000 R09: 00007fae9a9046c0 [ 287.254234][ C1] R10: 0000000000000007 R11: 0000000000000246 R12: 00002000005ab000 [ 287.254244][ C1] R13: 0000000000000000 R14: 00007ffd1ac3ad60 R15: 00007ffd1ac3ae48 [ 287.254264][ C1] [ 287.254271][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.177 msecs [ 287.628518][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.635402][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.646780][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.656868][ T31] Call Trace: [ 287.660160][ T31] [ 287.663109][ T31] dump_stack_lvl+0x99/0x250 [ 287.667714][ T31] ? __asan_memcpy+0x40/0x70 [ 287.672320][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.677547][ T31] ? __pfx__printk+0x10/0x10 [ 287.682255][ T31] vpanic+0x281/0x750 [ 287.686434][ T31] ? __pfx_vpanic+0x10/0x10 [ 287.691041][ T31] ? preempt_schedule+0xae/0xc0 [ 287.695906][ T31] ? preempt_schedule_common+0x83/0xd0 [ 287.701446][ T31] panic+0xb9/0xc0 [ 287.705296][ T31] ? __pfx_panic+0x10/0x10 [ 287.710254][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.715643][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 287.721899][ T31] watchdog+0xfd2/0xfe0 [ 287.726075][ T31] ? watchdog+0x1de/0xfe0 [ 287.730516][ T31] kthread+0x70e/0x8a0 [ 287.734697][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.739474][ T31] ? __pfx_kthread+0x10/0x10 [ 287.744366][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.749766][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.754980][ T31] ? __pfx_kthread+0x10/0x10 [ 287.759855][ T31] ret_from_fork+0x3f9/0x770 [ 287.764483][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.769607][ T31] ? __switch_to_asm+0x39/0x70 [ 287.774380][ T31] ? __switch_to_asm+0x33/0x70 [ 287.779160][ T31] ? __pfx_kthread+0x10/0x10 [ 287.783871][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.788747][ T31] [ 287.792237][ T31] Kernel Offset: disabled [ 287.796581][ T31] Rebooting in 86400 seconds..