./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor990345994 <...> Warning: Permanently added '10.128.0.226' (ED25519) to the list of known hosts. execve("./syz-executor990345994", ["./syz-executor990345994"], 0x7ffd50a70790 /* 10 vars */) = 0 brk(NULL) = 0x55555e2e5000 brk(0x55555e2e5d00) = 0x55555e2e5d00 arch_prctl(ARCH_SET_FS, 0x55555e2e5380) = 0 set_tid_address(0x55555e2e5650) = 5844 set_robust_list(0x55555e2e5660, 24) = 0 rseq(0x55555e2e5ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor990345994", 4096) = 27 getrandom("\xff\xb9\x3c\x84\xb4\xa2\x3a\xe3", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555e2e5d00 brk(0x55555e306d00) = 0x55555e306d00 brk(0x55555e307000) = 0x55555e307000 mprotect(0x7fe7403d0000, 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 5845 attached [pid 5845] set_robust_list(0x55555e2e5660, 24 [pid 5844] <... clone resumed>, child_tidptr=0x55555e2e5650) = 5845 [pid 5845] <... set_robust_list resumed>) = 0 [pid 5845] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5845] setpgid(0, 0) = 0 [pid 5845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5845] write(3, "1000", 4) = 4 [pid 5845] close(3) = 0 executing program [pid 5845] write(1, "executing program\n", 18) = 18 [pid 5845] creat("./file0", 000) = 3 [pid 5845] pipe2([4, 5], 0) = 0 [pid 5845] write(5, "\x15\x00\x00\x00\x65\xff\xff\x01\x7f\x00\x0e\x08\x00\x39\x50\x32\x30\x30\x30\x00\x00", 21) = 21 [pid 5845] dup(5) = 6 [pid 5845] write(6, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00", 24) = 24 [pid 5845] write(6, "\xb0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 176) = 176 [pid 5845] write(6, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 24) = 24 [pid 5845] write(6, "\x28\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00", 40) = 40 [pid 5845] mount(NULL, "./file0", "9p", 0, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006,") = 0 [pid 5845] openat(AT_FDCWD, "./file0", O_RDWR|O_CREAT|O_NONBLOCK|O_NOFOLLOW, 000) = 7 [pid 5845] writev(7, [{iov_base="\x14\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=131072}, {iov_base=NULL, iov_len=0}], 2 [pid 5844] kill(-5845, SIGKILL) = 0 [pid 5844] kill(5845, SIGKILL) = 0 [pid 5844] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5844] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5844] getdents64(3, 0x55555e2e66f0 /* 2 entries */, 32768) = 48 [pid 5844] getdents64(3, 0x55555e2e66f0 /* 0 entries */, 32768) = 0 [pid 5844] close(3) = 0 [ 286.621603][ T31] INFO: task syz-executor990:5845 blocked for more than 143 seconds. [ 286.629868][ T31] Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 [ 286.637510][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.646613][ T31] task:syz-executor990 state:D stack:24968 pid:5845 tgid:5845 ppid:5844 task_flags:0x400140 flags:0x00004006 [ 286.658857][ T31] Call Trace: [ 286.662253][ T31] [ 286.665222][ T31] __schedule+0x16a2/0x4cb0 [ 286.669921][ T31] ? do_raw_spin_lock+0x121/0x290 [ 286.674985][ T31] ? schedule+0x165/0x360 [ 286.679390][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.684283][ T31] ? __pfx___schedule+0x10/0x10 [ 286.689240][ T31] ? schedule+0x91/0x360 [ 286.693559][ T31] schedule+0x165/0x360 [ 286.697731][ T31] netfs_wait_for_request+0x1f0/0x600 [ 286.703196][ T31] ? __pfx_netfs_write_collection+0x10/0x10 [ 286.709199][ T31] ? __pfx_netfs_wait_for_request+0x10/0x10 [ 286.715122][ T31] ? __pfx_autoremove_wake_function+0x10/0x10 [ 286.721341][ T31] netfs_unbuffered_write_iter_locked+0x52a/0x910 [ 286.727895][ T31] netfs_unbuffered_write_iter+0x4c4/0x660 [ 286.733865][ T31] do_iter_readv_writev+0x56e/0x7f0 [ 286.739176][ T31] ? __pfx_do_iter_readv_writev+0x10/0x10 [ 286.744922][ T31] ? rcu_read_lock_any_held+0xb3/0x120 [ 286.750476][ T31] vfs_writev+0x31a/0x960 [ 286.754854][ T31] ? __pfx_vfs_writev+0x10/0x10 [ 286.760052][ T31] ? _raw_spin_lock_irq+0xae/0xf0 [ 286.765164][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.770548][ T31] do_writev+0x14d/0x2d0 [ 286.774861][ T31] ? __pfx_do_writev+0x10/0x10 [ 286.779868][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.784706][ T31] do_syscall_64+0xfa/0x3b0 [ 286.789289][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.794573][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.800730][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.805440][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.811409][ T31] RIP: 0033:0x7fe74035cf39 [ 286.815869][ T31] RSP: 002b:00007fff38fde958 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 286.824348][ T31] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fe74035cf39 [ 286.832407][ T31] RDX: 0000000000000002 RSI: 0000200000000000 RDI: 0000000000000007 [ 286.840708][ T31] RBP: 00002000000002c0 R08: 0000000000000006 R09: 0000000000000006 [ 286.848706][ T31] R10: 0000000000000006 R11: 0000000000000246 R12: 0000200000000400 [ 286.856750][ T31] R13: 00007fe7403a604e R14: 0000000000000001 R15: 0000000000000001 [ 286.864794][ T31] [ 286.867831][ T31] [ 286.867831][ T31] Showing all locks held in the system: [ 286.875591][ T31] 1 lock held by khungtaskd/31: [ 286.880595][ T31] #0: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.890646][ T31] 2 locks held by getty/5580: [ 286.895372][ T31] #0: ffff888030fce0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.905257][ T31] #1: ffffc90002fee2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.915478][ T31] 2 locks held by syz-executor990/5845: [ 286.921099][ T31] #0: ffff88807c262428 (sb_writers#8){.+.+}-{0:0}, at: vfs_writev+0x288/0x960 [ 286.930186][ T31] #1: ffff888078cb0148 (&sb->s_type->i_mutex_key#14){++++}-{4:4}, at: netfs_start_io_direct+0x1ef/0x230 [ 286.941516][ T31] [ 286.943849][ T31] ============================================= [ 286.943849][ T31] [ 286.952417][ T31] NMI backtrace for cpu 0 [ 286.952441][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full) [ 286.952463][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.952474][ T31] Call Trace: [ 286.952482][ T31] [ 286.952489][ T31] dump_stack_lvl+0x189/0x250 [ 286.952521][ T31] ? __wake_up_klogd+0xd9/0x110 [ 286.952544][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.952573][ T31] ? __pfx__printk+0x10/0x10 [ 286.952621][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.952649][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.952669][ T31] ? _printk+0xcf/0x120 [ 286.952692][ T31] ? __pfx__printk+0x10/0x10 [ 286.952713][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.952742][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.952769][ T31] watchdog+0xfee/0x1030 [ 286.952797][ T31] ? watchdog+0x1de/0x1030 [ 286.952831][ T31] kthread+0x711/0x8a0 [ 286.952857][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.952881][ T31] ? __pfx_kthread+0x10/0x10 [ 286.952904][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.952930][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.952956][ T31] ? __pfx_kthread+0x10/0x10 [ 286.952978][ T31] ret_from_fork+0x3fc/0x770 [ 286.953009][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.953042][ T31] ? __switch_to_asm+0x39/0x70 [ 286.953060][ T31] ? __switch_to_asm+0x33/0x70 [ 286.953078][ T31] ? __pfx_kthread+0x10/0x10 [ 286.953101][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.953138][ T31] [ 286.953146][ T31] Sending NMI from CPU 0 to CPUs 1: [ 287.110836][ C1] NMI backtrace for cpu 1 [ 287.110854][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full) [ 287.110874][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.110885][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x70 [ 287.110911][ C1] Code: 00 00 00 48 8b 3d a4 e6 f8 0b 48 89 de 5b e9 13 91 56 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 c0 99 92 65 8b 15 88 72 d9 10 81 e2 [ 287.110925][ C1] RSP: 0018:ffffc90000a08a40 EFLAGS: 00000802 [ 287.110941][ C1] RAX: f3f3f300f1f1f1f1 RBX: ffff8880b8739e00 RCX: 1ffff110170e7545 [ 287.110954][ C1] RDX: 0000000000000100 RSI: ffffffff8db5a5e7 RDI: 0000000000000001 [ 287.110965][ C1] RBP: ffffc90000a08b28 R08: 0000000000000003 R09: 0000000000000004 [ 287.110976][ C1] R10: dffffc0000000000 R11: fffff52000141158 R12: ffff8880b8739e00 [ 287.110988][ C1] R13: dffffc0000000000 R14: ffffc90000a08ac0 R15: 1ffff92000141154 [ 287.111001][ C1] FS: 0000000000000000(0000) GS:ffff888125d84000(0000) knlGS:0000000000000000 [ 287.111015][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.111026][ C1] CR2: 0000555fa9a8b660 CR3: 000000000df38000 CR4: 00000000003526f0 [ 287.111041][ C1] Call Trace: [ 287.111050][ C1] [ 287.111057][ C1] sched_clock+0xb/0x60 [ 287.111078][ C1] sched_clock_cpu+0x74/0x430 [ 287.111103][ C1] ? do_raw_spin_lock+0x121/0x290 [ 287.111122][ C1] ? __pfx_sched_clock_cpu+0x10/0x10 [ 287.111150][ C1] update_rq_clock+0x100/0x5b0 [ 287.111177][ C1] sched_balance_update_blocked_averages+0x20a/0x1580 [ 287.111204][ C1] ? kvm_sched_clock_read+0x11/0x20 [ 287.111226][ C1] ? sched_clock+0x3f/0x60 [ 287.111248][ C1] ? __pfx_sched_clock_cpu+0x10/0x10 [ 287.111271][ C1] ? __pfx_sched_balance_update_blocked_averages+0x10/0x10 [ 287.111303][ C1] _nohz_idle_balance+0x345/0x810 [ 287.111318][ C1] ? sched_clock+0x3f/0x60 [ 287.111341][ C1] ? __pfx__nohz_idle_balance+0x10/0x10 [ 287.111361][ C1] ? sched_balance_softirq+0x13/0x1a0 [ 287.111383][ C1] handle_softirqs+0x283/0x870 [ 287.111410][ C1] ? __irq_exit_rcu+0xca/0x1f0 [ 287.111436][ C1] ? __pfx_handle_softirqs+0x10/0x10 [ 287.111458][ C1] ? sched_clock_cpu+0x74/0x430 [ 287.111480][ C1] ? tick_do_update_jiffies64+0x54/0x310 [ 287.111499][ C1] ? irqtime_account_irq+0xb6/0x1c0 [ 287.111519][ C1] __irq_exit_rcu+0xca/0x1f0 [ 287.111542][ C1] ? __pfx___irq_exit_rcu+0x10/0x10 [ 287.111568][ C1] ? rcu_is_watching+0x15/0xb0 [ 287.111594][ C1] irq_exit_rcu+0x9/0x30 [ 287.111628][ C1] sysvec_call_function_single+0xa3/0xc0 [ 287.111651][ C1] [ 287.111657][ C1] [ 287.111663][ C1] asm_sysvec_call_function_single+0x1a/0x20 [ 287.111682][ C1] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 287.111705][ C1] Code: c3 dd 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 63 45 28 00 f3 0f 1e fa fb f4 98 dd 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 287.111718][ C1] RSP: 0018:ffffc90000197de0 EFLAGS: 000002c2 [ 287.111732][ C1] RAX: bfac171a76ceaf00 RBX: ffffffff81974c88 RCX: bfac171a76ceaf00 [ 287.111745][ C1] RDX: 0000000000000001 RSI: ffffffff8d96e77b RDI: ffffffff8be1b940 [ 287.111756][ C1] RBP: ffffc90000197f20 R08: ffff8880b8732f5b R09: 1ffff110170e65eb [ 287.111769][ C1] R10: dffffc0000000000 R11: ffffed10170e65ec R12: ffffffff8f9fdaf0 [ 287.111781][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003a52b40 [ 287.111794][ C1] ? do_idle+0x1e8/0x510 [ 287.111823][ C1] default_idle+0x13/0x20 [ 287.111837][ C1] default_idle_call+0x74/0xb0 [ 287.111852][ C1] do_idle+0x1e8/0x510 [ 287.111876][ C1] ? asm_sysvec_call_function_single+0x1a/0x20 [ 287.111893][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.111916][ C1] ? __pfx_do_idle+0x10/0x10 [ 287.111945][ C1] ? do_idle+0x4ef/0x510 [ 287.111979][ C1] cpu_startup_entry+0x44/0x60 [ 287.112003][ C1] start_secondary+0x101/0x110 [ 287.112023][ C1] common_startup_64+0x13e/0x147 [ 287.112049][ C1] [ 287.112057][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.221 msecs [ 287.112936][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.112972][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full) [ 287.113001][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.113016][ T31] Call Trace: [ 287.113026][ T31] [ 287.113037][ T31] dump_stack_lvl+0x99/0x250 [ 287.113074][ T31] ? __asan_memcpy+0x40/0x70 [ 287.113099][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.113131][ T31] ? __pfx__printk+0x10/0x10 [ 287.113169][ T31] panic+0x2db/0x790 [ 287.113209][ T31] ? __pfx_panic+0x10/0x10 [ 287.113241][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.113281][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.113312][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.113349][ T31] watchdog+0x102d/0x1030 [ 287.113389][ T31] ? watchdog+0x1de/0x1030 [ 287.113428][ T31] kthread+0x711/0x8a0 [ 287.113459][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.113487][ T31] ? __pfx_kthread+0x10/0x10 [ 287.113514][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.113544][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.113573][ T31] ? __pfx_kthread+0x10/0x10 [ 287.113600][ T31] ret_from_fork+0x3fc/0x770 [ 287.113634][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.113674][ T31] ? __switch_to_asm+0x39/0x70 [ 287.113695][ T31] ? __switch_to_asm+0x33/0x70 [ 287.113717][ T31] ? __pfx_kthread+0x10/0x10 [ 287.113743][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.113785][ T31] [ 287.663310][ T31] Kernel Offset: disabled [ 287.667655][ T31] Rebooting in 86400 seconds..