./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2314469301 <...> Warning: Permanently added '10.128.0.161' (ED25519) to the list of known hosts. execve("./syz-executor2314469301", ["./syz-executor2314469301"], 0x7ffc20273980 /* 10 vars */) = 0 brk(NULL) = 0x555595392000 brk(0x555595392d40) = 0x555595392d40 arch_prctl(ARCH_SET_FS, 0x5555953923c0) = 0 set_tid_address(0x555595392690) = 5852 set_robust_list(0x5555953926a0, 24) = 0 rseq(0x555595392ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2314469301", 4096) = 28 getrandom("\x29\x2b\x14\xa0\xf5\xee\x1b\x35", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555595392d40 brk(0x5555953b3d40) = 0x5555953b3d40 brk(0x5555953b4000) = 0x5555953b4000 mprotect(0x7f8db03a5000, 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=0x555595392690) = 5853 ./strace-static-x86_64: Process 5853 attached [pid 5853] set_robust_list(0x5555953926a0, 24) = 0 [pid 5853] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5853] setpgid(0, 0) = 0 [pid 5853] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5853] write(3, "1000", 4) = 4 [pid 5853] close(3) = 0 [pid 5853] write(1, "executing program\n", 18executing program ) = 18 [pid 5853] futex(0x7f8db03ab30c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5853] rt_sigaction(SIGRT_1, {sa_handler=0x7f8db03471e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f8db0338860}, NULL, 8) = 0 [pid 5853] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5853] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f8db02ba000 [pid 5853] mprotect(0x7f8db02bb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5853] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5853] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f8db02da990, parent_tid=0x7f8db02da990, exit_signal=0, stack=0x7f8db02ba000, stack_size=0x20300, tls=0x7f8db02da6c0}./strace-static-x86_64: Process 5854 attached [pid 5854] rseq(0x7f8db02dafe0, 0x20, 0, 0x53053053) = 0 [pid 5854] set_robust_list(0x7f8db02da9a0, 24) = 0 [pid 5853] <... clone3 resumed> => {parent_tid=[5854]}, 88) = 5854 [pid 5854] rt_sigprocmask(SIG_SETMASK, [], [pid 5853] rt_sigprocmask(SIG_SETMASK, [], [pid 5854] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5853] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5854] mremap(0x2000003c9000, 8192, 8192, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x2000001de000 [pid 5853] futex(0x7f8db03ab308, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 91.861215][ T24] cfg80211: failed to load regulatory.db [pid 5852] kill(-5853, SIGKILL) = 0 [pid 5852] kill(5853, SIGKILL) = 0 [pid 5852] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5852] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5852] getdents64(3, 0x555595393730 /* 2 entries */, 32768) = 48 [pid 5852] getdents64(3, 0x555595393730 /* 0 entries */, 32768) = 0 [pid 5852] close(3) = 0 [ 286.421722][ T31] INFO: task syz-executor231:5853 blocked for more than 143 seconds. [ 286.430014][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 286.437164][ T31] Blocked by coredump. [ 286.442350][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.452011][ T31] task:syz-executor231 state:D stack:26920 pid:5853 tgid:5853 ppid:5852 task_flags:0x40044c flags:0x00004006 [ 286.464711][ T31] Call Trace: [ 286.468027][ T31] [ 286.471439][ T31] __schedule+0x1737/0x4d30 [ 286.476035][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.481437][ T31] ? schedule+0x165/0x360 [ 286.485810][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.491155][ T31] ? __pfx___schedule+0x10/0x10 [ 286.496071][ T31] ? schedule+0x91/0x360 [ 286.500820][ T31] schedule+0x165/0x360 [ 286.505021][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.510983][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 286.516569][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 286.522801][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 286.528910][ T31] ? exit_mm+0xcc/0x2c0 [ 286.533394][ T31] ? __pfx_mm_release+0x10/0x10 [ 286.538286][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.544041][ T31] down_read+0x98/0x2e0 [ 286.548240][ T31] exit_mm+0xcc/0x2c0 [ 286.552644][ T31] ? __pfx_exit_mm+0x10/0x10 [ 286.557280][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.562569][ T31] do_exit+0x648/0x2300 [ 286.566778][ T31] ? do_raw_spin_lock+0x121/0x290 [ 286.574012][ T31] ? __pfx_do_exit+0x10/0x10 [ 286.578668][ T31] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 286.585064][ T31] do_group_exit+0x21c/0x2d0 [ 286.590016][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.595268][ T31] get_signal+0x1286/0x1340 [ 286.600256][ T31] arch_do_signal_or_restart+0x9a/0x750 [ 286.605846][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.611102][ T31] ? __pfx_arch_do_signal_or_restart+0x10/0x10 [ 286.617311][ T31] ? __bad_area_nosemaphore+0x3fb/0x780 [ 286.623379][ T31] ? local_irq_enable_exit_to_user+0x5/0x10 [ 286.629590][ T31] irqentry_exit_to_user_mode+0x81/0x120 [ 286.635271][ T31] exc_page_fault+0x9f/0xf0 [ 286.640302][ T31] asm_exc_page_fault+0x26/0x30 [ 286.645194][ T31] RIP: 0033:0x7f8db02e1a90 [ 286.650065][ T31] RSP: 002b:00007ffef847f468 EFLAGS: 00010202 [ 286.656176][ T31] RAX: 00007f8db02e1a90 RBX: 0000000000000000 RCX: 00007f8db03212a9 [ 286.664915][ T31] RDX: 00000000000f4240 RSI: 00007ffef847f4c0 RDI: 0000000000000001 [ 286.673277][ T31] RBP: 00007f8db03ab30c R08: 00007f8db03ab30c R09: 0000000000000000 [ 286.682166][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000064 [ 286.690458][ T31] R13: 00007ffef847f500 R14: 00007f8db02ecde0 R15: 00007f8db03ab300 [ 286.698482][ T31] [ 286.702047][ T31] [ 286.702047][ T31] Showing all locks held in the system: [ 286.711474][ T31] 1 lock held by khungtaskd/31: [ 286.716359][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.726979][ T31] 2 locks held by getty/5611: [ 286.731969][ T31] #0: ffff8880310980a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.742075][ T31] #1: ffffc9000332e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.752525][ T31] 1 lock held by syz-executor231/5853: [ 286.758004][ T31] #0: ffff8880333737a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 286.767259][ T31] 1 lock held by syz-executor231/5854: [ 286.773028][ T31] [ 286.775372][ T31] ============================================= [ 286.775372][ T31] [ 286.784334][ T31] NMI backtrace for cpu 1 [ 286.784357][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 286.784379][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 286.784391][ T31] Call Trace: [ 286.784398][ T31] [ 286.784406][ T31] dump_stack_lvl+0x189/0x250 [ 286.784442][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.784470][ T31] ? __pfx__printk+0x10/0x10 [ 286.784510][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.784537][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.784563][ T31] ? __pfx__printk+0x10/0x10 [ 286.784594][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.784619][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.784646][ T31] watchdog+0xf93/0xfe0 [ 286.784672][ T31] ? watchdog+0x1de/0xfe0 [ 286.784697][ T31] kthread+0x70e/0x8a0 [ 286.784729][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.784748][ T31] ? __pfx_kthread+0x10/0x10 [ 286.784777][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.784802][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.784827][ T31] ? __pfx_kthread+0x10/0x10 [ 286.784855][ T31] ret_from_fork+0x3f9/0x770 [ 286.784882][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.784912][ T31] ? __switch_to_asm+0x39/0x70 [ 286.784928][ T31] ? __switch_to_asm+0x33/0x70 [ 286.784944][ T31] ? __pfx_kthread+0x10/0x10 [ 286.784973][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.785006][ T31] [ 286.785013][ T31] Sending NMI from CPU 1 to CPUs 0: [ 286.932626][ C0] NMI backtrace for cpu 0 [ 286.932643][ C0] CPU: 0 UID: 0 PID: 5854 Comm: syz-executor231 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 286.932664][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 286.932674][ C0] RIP: 0010:check_preemption_disabled+0x50/0x120 [ 286.932697][ C0] Code: c1 ff ff ff 7f 74 23 65 48 8b 0d 5b c1 67 07 48 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d e9 01 cb 02 00 cc <48> c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 74 c8 65 [ 286.932711][ C0] RSP: 0018:ffffc90004037200 EFLAGS: 00000046 [ 286.932727][ C0] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000080000000 [ 286.932737][ C0] RDX: 0000000000000000 RSI: ffffffff8de5b067 RDI: ffffffff8c04d400 [ 286.932749][ C0] RBP: 00000000ffffffff R08: ffff888029ff5a00 R09: 0000000000000004 [ 286.932760][ C0] R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000246 [ 286.932769][ C0] R13: ffff888029ff5a00 R14: ffff8880333737a0 R15: 0000000000000000 [ 286.932781][ C0] FS: 00007f8db02da6c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 [ 286.932795][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.932806][ C0] CR2: 000055d18f46e5a0 CR3: 0000000077262000 CR4: 00000000003526f0 [ 286.932822][ C0] Call Trace: [ 286.932830][ C0] [ 286.932840][ C0] lock_is_held_type+0xfe/0x190 [ 286.932866][ C0] mt_validate+0x2544/0x4380 [ 286.932898][ C0] ? __pfx_mt_validate+0x10/0x10 [ 286.932921][ C0] ? __kasan_slab_alloc+0x6c/0x80 [ 286.932939][ C0] ? kmem_cache_alloc_bulk_noprof+0x4fd/0x790 [ 286.932961][ C0] ? kmem_cache_alloc_bulk_noprof+0xfa/0x790 [ 286.932990][ C0] validate_mm+0xb6/0x4b0 [ 286.933015][ C0] ? __pfx_validate_mm+0x10/0x10 [ 286.933046][ C0] vma_link+0x366/0x450 [ 286.933079][ C0] ? __pfx_vma_link+0x10/0x10 [ 286.933105][ C0] ? anon_vma_clone+0x49b/0x4f0 [ 286.933124][ C0] ? anon_vma_name+0x87/0xf0 [ 286.933141][ C0] ? vm_area_dup+0x4f5/0x680 [ 286.933162][ C0] copy_vma+0x70c/0x940 [ 286.933190][ C0] ? __pfx_copy_vma+0x10/0x10 [ 286.933217][ C0] ? __pfx_move_page_tables+0x10/0x10 [ 286.933253][ C0] move_vma+0x81f/0x1840 [ 286.933275][ C0] ? __lock_acquire+0xab9/0xd20 [ 286.933302][ C0] ? arch_get_unmapped_area_topdown+0x251/0xbc0 [ 286.933325][ C0] ? __pfx_move_vma+0x10/0x10 [ 286.933351][ C0] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 286.933379][ C0] ? cap_mmap_addr+0xb0/0x100 [ 286.933400][ C0] ? bpf_lsm_mmap_addr+0x9/0x20 [ 286.933415][ C0] ? security_mmap_addr+0x71/0x270 [ 286.933439][ C0] mremap_to+0x6d6/0x7a0 [ 286.933466][ C0] ? __pfx_mremap_to+0x10/0x10 [ 286.933491][ C0] ? check_prep_vma+0x740/0xae0 [ 286.933519][ C0] __se_sys_mremap+0xa0b/0xef0 [ 286.933553][ C0] ? __pfx___se_sys_mremap+0x10/0x10 [ 286.933580][ C0] ? __pfx_ptrace_notify+0x10/0x10 [ 286.933605][ C0] ? __x64_sys_mremap+0x20/0xc0 [ 286.933629][ C0] do_syscall_64+0xfa/0x3b0 [ 286.933656][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.933671][ C0] ? __switch_to_asm+0x39/0x70 [ 286.933686][ C0] ? clear_bhb_loop+0x60/0xb0 [ 286.933705][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.933721][ C0] RIP: 0033:0x7f8db03212a9 [ 286.933736][ 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 [ 286.933750][ C0] RSP: 002b:00007f8db02da238 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 286.933766][ C0] RAX: ffffffffffffffda RBX: 00007f8db03ab308 RCX: 00007f8db03212a9 [ 286.933778][ C0] RDX: 0000000000002000 RSI: 0000000000002000 RDI: 00002000003c9000 [ 286.933789][ C0] RBP: 00007f8db03ab300 R08: 00002000001de000 R09: 00007f8db02da6c0 [ 286.933800][ C0] R10: 0000000000000007 R11: 0000000000000246 R12: 00002000003c9000 [ 286.933811][ C0] R13: 0000000000000000 R14: 00007ffef847f2b0 R15: 00007ffef847f398 [ 286.933830][ C0] [ 286.933837][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.212 msecs [ 286.934718][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.332199][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.343573][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.353635][ T31] Call Trace: [ 287.356930][ T31] [ 287.359873][ T31] dump_stack_lvl+0x99/0x250 [ 287.364486][ T31] ? __asan_memcpy+0x40/0x70 [ 287.369097][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.374306][ T31] ? __pfx__printk+0x10/0x10 [ 287.378919][ T31] vpanic+0x281/0x750 [ 287.382910][ T31] ? __pfx_vpanic+0x10/0x10 [ 287.387419][ T31] ? __x2apic_send_IPI_mask+0x1e4/0x260 [ 287.392987][ T31] ? preempt_schedule+0xae/0xc0 [ 287.397851][ T31] ? preempt_schedule_common+0x83/0xd0 [ 287.403332][ T31] panic+0xb9/0xc0 [ 287.407064][ T31] ? __pfx_panic+0x10/0x10 [ 287.411489][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.416873][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 287.423035][ T31] watchdog+0xfd2/0xfe0 [ 287.427202][ T31] ? watchdog+0x1de/0xfe0 [ 287.431539][ T31] kthread+0x70e/0x8a0 [ 287.435621][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.440301][ T31] ? __pfx_kthread+0x10/0x10 [ 287.444904][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.450121][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.455329][ T31] ? __pfx_kthread+0x10/0x10 [ 287.459930][ T31] ret_from_fork+0x3f9/0x770 [ 287.464531][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.469656][ T31] ? __switch_to_asm+0x39/0x70 [ 287.474420][ T31] ? __switch_to_asm+0x33/0x70 [ 287.479192][ T31] ? __pfx_kthread+0x10/0x10 [ 287.483802][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.488577][ T31] [ 287.491934][ T31] Kernel Offset: disabled [ 287.496265][ T31] Rebooting in 86400 seconds..