./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1881304738 <...> Warning: Permanently added '10.128.0.70' (ED25519) to the list of known hosts. execve("./syz-executor1881304738", ["./syz-executor1881304738"], 0x7ffcb0053dd0 /* 10 vars */) = 0 brk(NULL) = 0x5555670d7000 brk(0x5555670d7d40) = 0x5555670d7d40 arch_prctl(ARCH_SET_FS, 0x5555670d73c0) = 0 set_tid_address(0x5555670d7690) = 5874 set_robust_list(0x5555670d76a0, 24) = 0 rseq(0x5555670d7ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1881304738", 4096) = 28 getrandom("\x55\xcc\x6d\x2f\x26\x7e\x6c\xd1", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555670d7d40 brk(0x5555670f8d40) = 0x5555670f8d40 brk(0x5555670f9000) = 0x5555670f9000 mprotect(0x7f8889b60000, 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 5875 attached [pid 5875] set_robust_list(0x5555670d76a0, 24 [pid 5874] <... clone resumed>, child_tidptr=0x5555670d7690) = 5875 [pid 5875] <... set_robust_list resumed>) = 0 [pid 5875] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5875] setpgid(0, 0) = 0 [pid 5875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5875] write(3, "1000", 4) = 4 [pid 5875] close(3) = 0 [pid 5875] write(1, "executing program\n", 18executing program ) = 18 [pid 5875] futex(0x7f8889b6630c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5875] rt_sigaction(SIGRT_1, {sa_handler=0x7f8889b021e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f8889af3860}, NULL, 8) = 0 [pid 5875] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5875] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f8889a75000 [pid 5875] mprotect(0x7f8889a76000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5875] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5875] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f8889a95990, parent_tid=0x7f8889a95990, exit_signal=0, stack=0x7f8889a75000, stack_size=0x20300, tls=0x7f8889a956c0}./strace-static-x86_64: Process 5876 attached [pid 5876] rseq(0x7f8889a95fe0, 0x20, 0, 0x53053053) = 0 [pid 5876] set_robust_list(0x7f8889a959a0, 24) = 0 [pid 5876] rt_sigprocmask(SIG_SETMASK, [], [pid 5875] <... clone3 resumed> => {parent_tid=[5876]}, 88) = 5876 [pid 5876] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5875] rt_sigprocmask(SIG_SETMASK, [], [pid 5876] futex(0x7f8889b66308, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5875] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5875] futex(0x7f8889b66308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5876] <... futex resumed>) = 0 [pid 5875] <... futex resumed>) = 1 [pid 5876] mremap(0x2000003c9000, 8192, 8192, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x2000001de000 [pid 5875] futex(0x7f8889b6630c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5875] futex(0x7f8889b6631c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5875] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5874] kill(-5875, SIGKILL) = 0 [pid 5875] <... mmap resumed>) = ? [pid 5874] kill(5875, SIGKILL) = 0 [pid 5874] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5874] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5874] getdents64(3, 0x5555670d8730 /* 2 entries */, 32768) = 48 [pid 5874] getdents64(3, 0x5555670d8730 /* 0 entries */, 32768) = 0 [pid 5874] close(3) = 0 [ 286.335132][ T31] INFO: task syz-executor188:5875 blocked for more than 143 seconds. [ 286.343641][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 286.350757][ T31] Blocked by coredump. [ 286.355401][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.364330][ T31] task:syz-executor188 state:D stack:26920 pid:5875 tgid:5875 ppid:5874 task_flags:0x40044c flags:0x00004006 [ 286.376484][ T31] Call Trace: [ 286.379765][ T31] [ 286.382947][ T31] __schedule+0x1737/0x4d30 [ 286.387500][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.392560][ T31] ? schedule+0x165/0x360 [ 286.396898][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.401761][ T31] ? __pfx___schedule+0x10/0x10 [ 286.407395][ T31] ? schedule+0x91/0x360 [ 286.411659][ T31] schedule+0x165/0x360 [ 286.416028][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.421495][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 286.427289][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 286.433192][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 286.439269][ T31] ? exit_mm+0xcc/0x2c0 [ 286.443677][ T31] ? __pfx_mm_release+0x10/0x10 [ 286.448536][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.453947][ T31] down_read+0x98/0x2e0 [ 286.458121][ T31] exit_mm+0xcc/0x2c0 [ 286.462118][ T31] ? __pfx_exit_mm+0x10/0x10 [ 286.467044][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.471821][ T31] do_exit+0x648/0x2300 [ 286.476628][ T31] ? do_raw_spin_lock+0x121/0x290 [ 286.481671][ T31] ? __pfx_do_exit+0x10/0x10 [ 286.486518][ T31] do_group_exit+0x21c/0x2d0 [ 286.491112][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.496518][ T31] get_signal+0x1286/0x1340 [ 286.501051][ T31] arch_do_signal_or_restart+0x9a/0x750 [ 286.506820][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.512030][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.517440][ T31] ? __pfx_arch_do_signal_or_restart+0x10/0x10 [ 286.523805][ T31] ? exit_to_user_mode_loop+0x40/0x110 [ 286.529358][ T31] exit_to_user_mode_loop+0x75/0x110 [ 286.534887][ T31] do_syscall_64+0x2bd/0x3b0 [ 286.539501][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.544943][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.551014][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.555897][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.561800][ T31] RIP: 0033:0x7f8889adc2e3 [ 286.566452][ T31] RSP: 002b:00007fffe4278c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 286.575101][ T31] RAX: fffffffffffffffc RBX: fffffffffffff000 RCX: 00007f8889adc2e3 [ 286.584658][ T31] RDX: 0000000000000000 RSI: 0000000000021000 RDI: 0000000000000000 [ 286.592794][ T31] RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000 [ 286.600767][ T31] R10: 0000000000020022 R11: 0000000000000246 R12: 00007fffe4278e30 [ 286.609011][ T31] R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000 [ 286.617209][ T31] [ 286.620292][ T31] [ 286.620292][ T31] Showing all locks held in the system: [ 286.628561][ T31] 1 lock held by khungtaskd/31: [ 286.633576][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.643630][ T31] 1 lock held by syslogd/5202: [ 286.648389][ T31] #0: ffff8880b8639f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 [ 286.658528][ T31] 2 locks held by getty/5611: [ 286.663349][ T31] #0: ffff88814da660a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.673274][ T31] #1: ffffc900036c32f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.683557][ T31] 1 lock held by syz-executor188/5875: [ 286.689007][ T31] #0: ffff8880793b2220 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 286.698495][ T31] 1 lock held by syz-executor188/5876: [ 286.704150][ T31] [ 286.706477][ T31] ============================================= [ 286.706477][ T31] [ 286.715200][ T31] NMI backtrace for cpu 1 [ 286.715221][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 286.715240][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.715250][ T31] Call Trace: [ 286.715257][ T31] [ 286.715264][ T31] dump_stack_lvl+0x189/0x250 [ 286.715290][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.715312][ T31] ? __pfx__printk+0x10/0x10 [ 286.715346][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.715369][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.715391][ T31] ? __pfx__printk+0x10/0x10 [ 286.715420][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.715441][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.715464][ T31] watchdog+0xf93/0xfe0 [ 286.715486][ T31] ? watchdog+0x1de/0xfe0 [ 286.715509][ T31] kthread+0x70e/0x8a0 [ 286.715534][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.715550][ T31] ? __pfx_kthread+0x10/0x10 [ 286.715573][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.715594][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.715613][ T31] ? __pfx_kthread+0x10/0x10 [ 286.715635][ T31] ret_from_fork+0x3f9/0x770 [ 286.715658][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.715683][ T31] ? __switch_to_asm+0x39/0x70 [ 286.715697][ T31] ? __switch_to_asm+0x33/0x70 [ 286.715711][ T31] ? __pfx_kthread+0x10/0x10 [ 286.715733][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.715764][ T31] [ 286.715770][ T31] Sending NMI from CPU 1 to CPUs 0: [ 286.862442][ C0] NMI backtrace for cpu 0 [ 286.862514][ C0] CPU: 0 UID: 0 PID: 5876 Comm: syz-executor188 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 286.862532][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.862542][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x70 [ 286.862560][ C0] Code: 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 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 [ 286.862572][ C0] RSP: 0018:ffffc900040f7278 EFLAGS: 00000246 [ 286.862585][ C0] RAX: ffffffff8b7844bf RBX: ffffffff8cdac6a1 RCX: ffff888033711e00 [ 286.862597][ C0] RDX: 0000000080000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 286.862606][ C0] RBP: ffffc900040f7450 R08: ffff888033711e00 R09: 0000000000000004 [ 286.862616][ C0] R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000006 [ 286.862624][ C0] R13: 0000000000ffc000 R14: 00001fe15bf2dfff R15: ffffffff8cdac701 [ 286.862635][ C0] FS: 00007f8889a956c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 [ 286.862648][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.862658][ C0] CR2: 00005619b137a168 CR3: 0000000075244000 CR4: 00000000003526f0 [ 286.862671][ C0] Call Trace: [ 286.862677][ C0] [ 286.862682][ C0] mt_validate+0x26cf/0x4380 [ 286.862708][ C0] ? __pfx_mt_validate+0x10/0x10 [ 286.862739][ C0] validate_mm+0xb6/0x4b0 [ 286.862759][ C0] ? __pfx_validate_mm+0x10/0x10 [ 286.862785][ C0] vma_link+0x366/0x450 [ 286.862803][ C0] ? __pfx_vma_link+0x10/0x10 [ 286.862824][ C0] ? anon_vma_clone+0x49b/0x4f0 [ 286.862839][ C0] ? anon_vma_name+0x87/0xf0 [ 286.862854][ C0] ? vm_area_dup+0x4f5/0x680 [ 286.862871][ C0] copy_vma+0x70c/0x940 [ 286.862898][ C0] ? __pfx_copy_vma+0x10/0x10 [ 286.862918][ C0] ? __pfx_move_page_tables+0x10/0x10 [ 286.862947][ C0] move_vma+0x81f/0x1840 [ 286.862965][ C0] ? __lock_acquire+0xab9/0xd20 [ 286.862988][ C0] ? arch_get_unmapped_area_topdown+0x251/0xbc0 [ 286.863006][ C0] ? __pfx_move_vma+0x10/0x10 [ 286.863026][ C0] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 286.863048][ C0] ? cap_mmap_addr+0xb0/0x100 [ 286.863065][ C0] ? bpf_lsm_mmap_addr+0x9/0x20 [ 286.863079][ C0] ? security_mmap_addr+0x71/0x270 [ 286.863098][ C0] mremap_to+0x6d6/0x7a0 [ 286.863119][ C0] ? __pfx_mremap_to+0x10/0x10 [ 286.863138][ C0] ? check_prep_vma+0x740/0xae0 [ 286.863161][ C0] __se_sys_mremap+0xa0b/0xef0 [ 286.863188][ C0] ? __pfx___se_sys_mremap+0x10/0x10 [ 286.863208][ C0] ? __pfx_ptrace_notify+0x10/0x10 [ 286.863230][ C0] ? __x64_sys_mremap+0x20/0xc0 [ 286.863248][ C0] do_syscall_64+0xfa/0x3b0 [ 286.863267][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.863281][ C0] ? __switch_to_asm+0x39/0x70 [ 286.863294][ C0] ? clear_bhb_loop+0x60/0xb0 [ 286.863310][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.863323][ C0] RIP: 0033:0x7f8889adc2a9 [ 286.863336][ 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 [ 286.863346][ C0] RSP: 002b:00007f8889a95238 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 286.863360][ C0] RAX: ffffffffffffffda RBX: 00007f8889b66308 RCX: 00007f8889adc2a9 [ 286.863371][ C0] RDX: 0000000000002000 RSI: 0000000000002000 RDI: 00002000003c9000 [ 286.863380][ C0] RBP: 00007f8889b66300 R08: 00002000001de000 R09: 00007f8889a956c0 [ 286.863390][ C0] R10: 0000000000000007 R11: 0000000000000246 R12: 00002000003c9000 [ 286.863399][ C0] R13: 0000000000000000 R14: 00007fffe4278be0 R15: 00007fffe4278cc8 [ 286.863417][ C0] [ 286.863485][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.228187][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.239451][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.249490][ T31] Call Trace: [ 287.252758][ T31] [ 287.255674][ T31] dump_stack_lvl+0x99/0x250 [ 287.260266][ T31] ? __asan_memcpy+0x40/0x70 [ 287.264856][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.270040][ T31] ? __pfx__printk+0x10/0x10 [ 287.274624][ T31] vpanic+0x281/0x750 [ 287.278593][ T31] ? __pfx_vpanic+0x10/0x10 [ 287.283083][ T31] ? __x2apic_send_IPI_mask+0x1e4/0x260 [ 287.288636][ T31] ? preempt_schedule+0xae/0xc0 [ 287.293478][ T31] ? preempt_schedule_common+0x83/0xd0 [ 287.298938][ T31] panic+0xb9/0xc0 [ 287.302650][ T31] ? __pfx_panic+0x10/0x10 [ 287.307054][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.312418][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 287.318559][ T31] watchdog+0xfd2/0xfe0 [ 287.322703][ T31] ? watchdog+0x1de/0xfe0 [ 287.327028][ T31] kthread+0x70e/0x8a0 [ 287.331084][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.335748][ T31] ? __pfx_kthread+0x10/0x10 [ 287.340333][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.345525][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.350710][ T31] ? __pfx_kthread+0x10/0x10 [ 287.355288][ T31] ret_from_fork+0x3f9/0x770 [ 287.359869][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.364969][ T31] ? __switch_to_asm+0x39/0x70 [ 287.369711][ T31] ? __switch_to_asm+0x33/0x70 [ 287.374452][ T31] ? __pfx_kthread+0x10/0x10 [ 287.379029][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.383782][ T31] [ 287.387036][ T31] Kernel Offset: disabled [ 287.391346][ T31] Rebooting in 86400 seconds..