./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3009586470 <...> Warning: Permanently added '10.128.10.27' (ED25519) to the list of known hosts. execve("./syz-executor3009586470", ["./syz-executor3009586470"], 0x7ffc911b1730 /* 10 vars */) = 0 brk(NULL) = 0x55559307e000 brk(0x55559307ed40) = 0x55559307ed40 arch_prctl(ARCH_SET_FS, 0x55559307e3c0) = 0 set_tid_address(0x55559307e690) = 5873 set_robust_list(0x55559307e6a0, 24) = 0 rseq(0x55559307ece0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3009586470", 4096) = 28 getrandom("\x52\xf3\xf1\x32\xb2\x53\xb9\x8f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55559307ed40 brk(0x55559309fd40) = 0x55559309fd40 brk(0x5555930a0000) = 0x5555930a0000 mprotect(0x7f1876ab9000, 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 [pid 5874] set_robust_list(0x55559307e6a0, 24 [pid 5873] <... clone resumed>, child_tidptr=0x55559307e690) = 5874 [pid 5874] <... set_robust_list resumed>) = 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(0x7f1876abf30c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5874] rt_sigaction(SIGRT_1, {sa_handler=0x7f1876a5b1e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f1876a4c860}, 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) = 0x7f18769ce000 [pid 5874] mprotect(0x7f18769cf000, 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=0x7f18769ee990, parent_tid=0x7f18769ee990, exit_signal=0, stack=0x7f18769ce000, stack_size=0x20300, tls=0x7f18769ee6c0}./strace-static-x86_64: Process 5875 attached [pid 5875] rseq(0x7f18769eefe0, 0x20, 0, 0x53053053 [pid 5874] <... clone3 resumed> => {parent_tid=[5875]}, 88) = 5875 [pid 5875] <... rseq resumed>) = 0 [pid 5874] rt_sigprocmask(SIG_SETMASK, [], [pid 5875] set_robust_list(0x7f18769ee9a0, 24 [pid 5874] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5875] <... set_robust_list resumed>) = 0 [pid 5875] rt_sigprocmask(SIG_SETMASK, [], [pid 5874] futex(0x7f1876abf308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5875] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5874] <... futex resumed>) = 0 [pid 5875] mremap(0x20000092e000, 8192, 8192, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x200000167000 [pid 5874] futex(0x7f1876abf30c, 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, 0x55559307f730 /* 2 entries */, 32768) = 48 [pid 5873] getdents64(3, 0x55559307f730 /* 0 entries */, 32768) = 0 [pid 5873] close(3) = 0 [ 430.042065][ T31] INFO: task syz-executor300:5874 blocked for more than 143 seconds. [ 430.050236][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 430.058116][ T31] Blocked by coredump. [ 430.062906][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 430.071592][ T31] task:syz-executor300 state:D stack:26920 pid:5874 tgid:5874 ppid:5873 task_flags:0x40004c flags:0x00004002 [ 430.083802][ T31] Call Trace: [ 430.087101][ T31] [ 430.090138][ T31] __schedule+0x1737/0x4d30 [ 430.094994][ T31] ? __lock_acquire+0xab9/0xd20 [ 430.099884][ T31] ? schedule+0x165/0x360 [ 430.104921][ T31] ? __lock_acquire+0xab9/0xd20 [ 430.109800][ T31] ? __pfx___schedule+0x10/0x10 [ 430.114899][ T31] ? schedule+0x91/0x360 [ 430.119180][ T31] schedule+0x165/0x360 [ 430.123647][ T31] schedule_preempt_disabled+0x13/0x30 [ 430.129142][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 430.134958][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 430.140718][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 430.147080][ T31] ? exit_mm+0xcc/0x2c0 [ 430.151327][ T31] ? __pfx_mm_release+0x10/0x10 [ 430.156440][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.161686][ T31] down_read+0x98/0x2e0 [ 430.166633][ T31] exit_mm+0xcc/0x2c0 [ 430.170667][ T31] ? __pfx_exit_mm+0x10/0x10 [ 430.175531][ T31] ? rcu_is_watching+0x15/0xb0 [ 430.180342][ T31] do_exit+0x648/0x2300 [ 430.184810][ T31] ? __pfx_do_exit+0x10/0x10 [ 430.189455][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.194915][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.200149][ T31] do_group_exit+0x21c/0x2d0 [ 430.205027][ T31] __x64_sys_exit_group+0x3f/0x40 [ 430.210081][ T31] x64_sys_call+0x21f7/0x2200 [ 430.215009][ T31] do_syscall_64+0xfa/0x3b0 [ 430.219565][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.225064][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.231166][ T31] ? clear_bhb_loop+0x60/0xb0 [ 430.236086][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.242212][ T31] RIP: 0033:0x7f1876a33309 [ 430.246673][ T31] RSP: 002b:00007ffd4933ca88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 430.255301][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1876a33309 [ 430.263512][ T31] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 430.271500][ T31] RBP: 00007f1876abf2b0 R08: ffffffffffffffb0 R09: 7fffffffffffffff [ 430.280126][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1876abf2b0 [ 430.288339][ T31] R13: 0000000000000000 R14: 00007f1876abfe40 R15: 00007f1876a01120 [ 430.296535][ T31] [ 430.299625][ T31] [ 430.299625][ T31] Showing all locks held in the system: [ 430.307923][ T31] 1 lock held by khungtaskd/31: [ 430.312998][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.323088][ T31] 2 locks held by getty/5610: [ 430.327781][ T31] #0: ffff888033f710a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.337816][ T31] #1: ffffc900036cb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.348160][ T31] 1 lock held by syz-executor300/5874: [ 430.353786][ T31] #0: ffff88801c7bcd20 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 430.362792][ T31] 1 lock held by syz-executor300/5875: [ 430.368323][ T31] [ 430.370678][ T31] ============================================= [ 430.370678][ T31] [ 430.379421][ T31] NMI backtrace for cpu 1 [ 430.379444][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 430.379467][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.379490][ T31] Call Trace: [ 430.379497][ T31] [ 430.379504][ T31] dump_stack_lvl+0x189/0x250 [ 430.379535][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.379561][ T31] ? __pfx__printk+0x10/0x10 [ 430.379599][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.379624][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.379649][ T31] ? __pfx__printk+0x10/0x10 [ 430.379678][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.379701][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.379726][ T31] watchdog+0xf93/0xfe0 [ 430.379750][ T31] ? watchdog+0x1de/0xfe0 [ 430.379791][ T31] kthread+0x70e/0x8a0 [ 430.379823][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.379843][ T31] ? __pfx_kthread+0x10/0x10 [ 430.379872][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.379896][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.379921][ T31] ? __pfx_kthread+0x10/0x10 [ 430.379950][ T31] ret_from_fork+0x3f9/0x770 [ 430.379976][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.380005][ T31] ? __switch_to_asm+0x39/0x70 [ 430.380021][ T31] ? __switch_to_asm+0x33/0x70 [ 430.380036][ T31] ? __pfx_kthread+0x10/0x10 [ 430.380065][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.380098][ T31] [ 430.380105][ T31] Sending NMI from CPU 1 to CPUs 0: [ 430.527280][ C0] NMI backtrace for cpu 0 [ 430.527296][ C0] CPU: 0 UID: 0 PID: 5875 Comm: syz-executor300 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 430.527315][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.527325][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 [ 430.527347][ C0] Code: 8b 3d e4 43 29 0c 48 89 de 5b e9 b3 84 58 00 cc cc cc 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 08 4f 27 11 81 e2 00 01 ff 00 [ 430.527360][ C0] RSP: 0018:ffffc90004307278 EFLAGS: 00000286 [ 430.527375][ C0] RAX: ffffffff8b78380b RBX: 0000000000000001 RCX: ffff888079655a00 [ 430.527388][ C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 430.527397][ C0] RBP: ffffc90004307450 R08: ffff888079655a00 R09: 0000000000000004 [ 430.527407][ C0] R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000006 [ 430.527417][ C0] R13: ffff888078614a80 R14: 0000000000000300 R15: ffff88807e90320c [ 430.527428][ C0] FS: 00007f18769ee6c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 [ 430.527442][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.527453][ C0] CR2: 0000564332598660 CR3: 000000002475e000 CR4: 00000000003526f0 [ 430.527467][ C0] Call Trace: [ 430.527474][ C0] [ 430.527479][ C0] mt_validate+0x1a1b/0x4380 [ 430.527513][ C0] ? __pfx_mt_validate+0x10/0x10 [ 430.527535][ C0] ? __kasan_slab_alloc+0x6c/0x80 [ 430.527553][ C0] ? kmem_cache_alloc_bulk_noprof+0x4fd/0x790 [ 430.527575][ C0] ? kmem_cache_alloc_bulk_noprof+0xfa/0x790 [ 430.527604][ C0] validate_mm+0xb6/0x4b0 [ 430.527629][ C0] ? __pfx_validate_mm+0x10/0x10 [ 430.527661][ C0] vma_link+0x366/0x450 [ 430.527686][ C0] ? __pfx_vma_link+0x10/0x10 [ 430.527712][ C0] ? anon_vma_clone+0x49b/0x4f0 [ 430.527730][ C0] ? anon_vma_name+0x87/0xf0 [ 430.527747][ C0] ? vm_area_dup+0x4f5/0x680 [ 430.527769][ C0] copy_vma+0x70c/0x940 [ 430.527797][ C0] ? __pfx_copy_vma+0x10/0x10 [ 430.527823][ C0] ? __pfx_move_page_tables+0x10/0x10 [ 430.527845][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.527881][ C0] move_vma+0x81f/0x1840 [ 430.527903][ C0] ? __lock_acquire+0xab9/0xd20 [ 430.527930][ C0] ? arch_get_unmapped_area_topdown+0x251/0xbc0 [ 430.527953][ C0] ? __pfx_move_vma+0x10/0x10 [ 430.527979][ C0] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 430.528006][ C0] ? cap_mmap_addr+0xb0/0x100 [ 430.528027][ C0] ? bpf_lsm_mmap_addr+0x9/0x20 [ 430.528042][ C0] ? security_mmap_addr+0x71/0x270 [ 430.528066][ C0] mremap_to+0x6d6/0x7a0 [ 430.528093][ C0] ? __pfx_mremap_to+0x10/0x10 [ 430.528118][ C0] ? check_prep_vma+0x740/0xae0 [ 430.528152][ C0] __se_sys_mremap+0xa0b/0xef0 [ 430.528186][ C0] ? __pfx___se_sys_mremap+0x10/0x10 [ 430.528212][ C0] ? __pfx_ptrace_notify+0x10/0x10 [ 430.528239][ C0] ? __x64_sys_mremap+0x20/0xc0 [ 430.528262][ C0] do_syscall_64+0xfa/0x3b0 [ 430.528287][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.528314][ C0] ? __switch_to_asm+0x39/0x70 [ 430.528327][ C0] ? clear_bhb_loop+0x60/0xb0 [ 430.528357][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.528371][ C0] RIP: 0033:0x7f1876a352a9 [ 430.528384][ 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 [ 430.528395][ C0] RSP: 002b:00007f18769ee238 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 430.528409][ C0] RAX: ffffffffffffffda RBX: 00007f1876abf308 RCX: 00007f1876a352a9 [ 430.528419][ C0] RDX: 0000000000002000 RSI: 0000000000002000 RDI: 000020000092e000 [ 430.528428][ C0] RBP: 00007f1876abf300 R08: 0000200000167000 R09: 00007f18769ee6c0 [ 430.528437][ C0] R10: 0000000000000007 R11: 0000000000000246 R12: 000020000092e000 [ 430.528446][ C0] R13: 0000000000000000 R14: 00007ffd4933c920 R15: 00007ffd4933ca08 [ 430.528463][ C0] [ 430.528469][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.190 msecs [ 430.529344][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.926599][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 430.937882][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.947943][ T31] Call Trace: [ 430.951231][ T31] [ 430.954157][ T31] dump_stack_lvl+0x99/0x250 [ 430.958750][ T31] ? __asan_memcpy+0x40/0x70 [ 430.963358][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.968572][ T31] ? __pfx__printk+0x10/0x10 [ 430.973176][ T31] vpanic+0x281/0x750 [ 430.977167][ T31] ? __pfx_vpanic+0x10/0x10 [ 430.981682][ T31] ? __x2apic_send_IPI_mask+0x1e4/0x260 [ 430.987246][ T31] ? preempt_schedule+0xae/0xc0 [ 430.992114][ T31] ? preempt_schedule_common+0x83/0xd0 [ 430.997589][ T31] panic+0xb9/0xc0 [ 431.001320][ T31] ? __pfx_panic+0x10/0x10 [ 431.005746][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 431.011142][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 431.017316][ T31] watchdog+0xfd2/0xfe0 [ 431.021482][ T31] ? watchdog+0x1de/0xfe0 [ 431.025825][ T31] kthread+0x70e/0x8a0 [ 431.029908][ T31] ? __pfx_watchdog+0x10/0x10 [ 431.034594][ T31] ? __pfx_kthread+0x10/0x10 [ 431.039195][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 431.044400][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 431.049624][ T31] ? __pfx_kthread+0x10/0x10 [ 431.054228][ T31] ret_from_fork+0x3f9/0x770 [ 431.058825][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 431.063946][ T31] ? __switch_to_asm+0x39/0x70 [ 431.068705][ T31] ? __switch_to_asm+0x33/0x70 [ 431.073479][ T31] ? __pfx_kthread+0x10/0x10 [ 431.078103][ T31] ret_from_fork_asm+0x1a/0x30 [ 431.082876][ T31] [ 431.086235][ T31] Kernel Offset: disabled [ 431.090582][ T31] Rebooting in 86400 seconds..