./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor735238040 <...> forked to background, child pid 3187 no interfaces have a carrier [ 23.383113][ T3188] 8021q: adding VLAN 0 to HW filter on device bond0 [ 23.392922][ T3188] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.43' (ECDSA) to the list of known hosts. execve("./syz-executor735238040", ["./syz-executor735238040"], 0x7fff477a2720 /* 10 vars */) = 0 brk(NULL) = 0x555557376000 brk(0x555557376c40) = 0x555557376c40 arch_prctl(ARCH_SET_FS, 0x555557376300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor735238040", 4096) = 27 brk(0x555557397c40) = 0x555557397c40 brk(0x555557398000) = 0x555557398000 mprotect(0x7fc468a44000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555573765d0) = 3609 ./strace-static-x86_64: Process 3609 attached [pid 3609] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3609] setpgid(0, 0) = 0 [pid 3609] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 3609] write(3, "1000", 4) = 4 [pid 3609] close(3) = 0 [pid 3609] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3 [pid 3609] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4 [pid 3609] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 5 [pid 3609] socketpair(AF_TIPC, SOCK_SEQPACKET, 0, [6, 7]) = 0 [pid 3609] ioctl(5, NBD_SET_SOCK, 6) = 0 [pid 3609] ioctl(3, NBD_SET_SIZE_BLOCKS, 17) = 0 syzkaller login: [ 40.277630][ T3609] nbd0: detected capacity change from 0 to 34 [pid 3609] ioctl(4, NBD_DO_IT [pid 3608] kill(-3609, SIGKILL) = 0 [pid 3609] <... ioctl resumed>) = ? [pid 3608] kill(3609, SIGKILL) = 0 [ 45.203826][ T3609] block nbd0: shutting down sockets [pid 3608] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 3608] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 3608] getdents64(3, 0x555557377620 /* 2 entries */, 32768) = 48 [pid 3608] getdents64(3, 0x555557377620 /* 0 entries */, 32768) = 0 [pid 3608] close(3) = 0 [ 70.436496][ T9] block nbd0: Possible stuck request ffff88801e418000: control (read@0,4096B). Runtime 30 seconds [ 76.196969][ T22] cfg80211: failed to load regulatory.db [ 100.516470][ T9] block nbd0: Possible stuck request ffff88801e418000: control (read@0,4096B). Runtime 60 seconds [ 101.601037][ T2975] udevd[2975]: worker [3611] /devices/virtual/block/nbd0 is taking a long time [ 130.596527][ T9] block nbd0: Possible stuck request ffff88801e418000: control (read@0,4096B). Runtime 90 seconds [ 160.676440][ T9] block nbd0: Possible stuck request ffff88801e418000: control (read@0,4096B). Runtime 120 seconds [ 190.756468][ T9] block nbd0: Possible stuck request ffff88801e418000: control (read@0,4096B). Runtime 150 seconds [ 220.836372][ T9] block nbd0: Possible stuck request ffff88801e418000: control (read@0,4096B). Runtime 180 seconds [ 222.334853][ T2975] udevd[2975]: worker [3611] /devices/virtual/block/nbd0 timeout; kill it [ 222.343570][ T2975] udevd[2975]: seq 7480 '/devices/virtual/block/nbd0' killed [ 250.916509][ T9] block nbd0: Possible stuck request ffff88801e418000: control (read@0,4096B). Runtime 210 seconds [ 280.996368][ T9] block nbd0: Possible stuck request ffff88801e418000: control (read@0,4096B). Runtime 240 seconds [ 286.116392][ T28] INFO: task syz-executor735:3609 blocked for more than 143 seconds. [ 286.124466][ T28] Not tainted 6.0.0-rc2-next-20220826-syzkaller #0 [ 286.131594][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.140298][ T28] task:syz-executor735 state:D stack:28176 pid:3609 ppid:3608 flags:0x00004006 [ 286.149561][ T28] Call Trace: [ 286.152840][ T28] [ 286.155760][ T28] __schedule+0xae5/0x52c0 [ 286.160265][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 286.165224][ T28] ? rcu_read_lock_sched_held+0xd/0x70 [ 286.170700][ T28] ? lock_release+0x560/0x780 [ 286.175383][ T28] ? io_schedule_timeout+0x140/0x140 [ 286.180685][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 286.185631][ T28] schedule+0xda/0x1b0 [ 286.189716][ T28] schedule_preempt_disabled+0xf/0x20 [ 286.195101][ T28] __mutex_lock+0xa44/0x1350 [ 286.199710][ T28] ? blkdev_put+0xbc/0x770 [ 286.204197][ T28] ? mutex_lock_io_nested+0x1190/0x1190 [ 286.209779][ T28] ? locks_check_ctx_file_list+0x1d/0x110 [ 286.215516][ T28] ? trace_hardirqs_on+0x2d/0x120 [ 286.220557][ T28] ? do_raw_spin_unlock+0x171/0x230 [ 286.225764][ T28] ? _raw_spin_unlock+0x24/0x40 [ 286.230649][ T28] ? locks_remove_file+0x2f7/0x570 [ 286.235766][ T28] blkdev_put+0xbc/0x770 [ 286.240030][ T28] blkdev_close+0x64/0x80 [ 286.244369][ T28] __fput+0x27c/0xa90 [ 286.248377][ T28] ? blkdev_fsync+0xa0/0xa0 [ 286.252903][ T28] task_work_run+0x16b/0x270 [ 286.257527][ T28] ? task_work_cancel+0x30/0x30 [ 286.262387][ T28] ? do_raw_spin_unlock+0x171/0x230 [ 286.267633][ T28] do_exit+0xc3f/0x2b60 [ 286.271798][ T28] ? rcu_read_lock_sched_held+0xd/0x70 [ 286.277305][ T28] ? lock_release+0x560/0x780 [ 286.281989][ T28] ? lock_downgrade+0x6e0/0x6e0 [ 286.286851][ T28] ? get_signal+0x93b/0x2610 [ 286.291452][ T28] ? mm_update_next_owner+0x7b0/0x7b0 [ 286.296834][ T28] ? do_raw_spin_lock+0x120/0x2a0 [ 286.301867][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 286.306816][ T28] do_group_exit+0xd0/0x2a0 [ 286.311324][ T28] get_signal+0x238c/0x2610 [ 286.315817][ T28] ? map_id_up+0x178/0x2f0 [ 286.320265][ T28] ? exit_signals+0x8b0/0x8b0 [ 286.324961][ T28] ? lock_release+0x560/0x780 [ 286.329646][ T28] ? __task_pid_nr_ns+0x168/0x4b0 [ 286.334685][ T28] ? lock_downgrade+0x6e0/0x6e0 [ 286.339551][ T28] arch_do_signal_or_restart+0x82/0x2300 [ 286.345203][ T28] ? from_kuid+0xc0/0xc0 [ 286.349463][ T28] ? __task_pid_nr_ns+0x18a/0x4b0 [ 286.354501][ T28] ? get_sigframe_size+0x10/0x10 [ 286.359455][ T28] ? ptrace_notify+0xfa/0x140 [ 286.364138][ T28] ? lock_downgrade+0x6e0/0x6e0 [ 286.369012][ T28] ? send_sig+0xfe/0x160 [ 286.373272][ T28] ? send_sig_info+0x140/0x140 [ 286.378076][ T28] ? trace_hardirqs_on+0x2d/0x120 [ 286.383115][ T28] exit_to_user_mode_prepare+0x15f/0x250 [ 286.388770][ T28] syscall_exit_to_user_mode+0x19/0x50 [ 286.394300][ T28] do_syscall_64+0x42/0xb0 [ 286.398732][ T28] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 286.404636][ T28] RIP: 0033:0x7fc4689d76d9 [ 286.409056][ T28] RSP: 002b:00007fff4349f658 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 286.417482][ T28] RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 00007fc4689d76d9 [ 286.425439][ T28] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000004 [ 286.433420][ T28] RBP: 0000000000000000 R08: 00007fff4349f7f8 R09: 00007fff4349f7f8 [ 286.441406][ T28] R10: 00007fff4349f7f8 R11: 0000000000000246 R12: 00007fc468996760 [ 286.449385][ T28] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 286.457375][ T28] [ 286.460390][ T28] NMI backtrace for cpu 1 [ 286.464705][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-next-20220826-syzkaller #0 [ 286.473965][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.484005][ T28] Call Trace: [ 286.487281][ T28] [ 286.490208][ T28] dump_stack_lvl+0xcd/0x134 [ 286.494868][ T28] nmi_cpu_backtrace.cold+0x46/0x14f [ 286.500172][ T28] ? lapic_can_unplug_cpu+0x80/0x80 [ 286.505379][ T28] nmi_trigger_cpumask_backtrace+0x206/0x250 [ 286.511382][ T28] watchdog+0xcf7/0xfd0 [ 286.515553][ T28] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 286.521546][ T28] kthread+0x2e4/0x3a0 [ 286.525622][ T28] ? kthread_complete_and_exit+0x40/0x40 [ 286.531264][ T28] ret_from_fork+0x1f/0x30 [ 286.535697][ T28] [ 286.538812][ T28] Sending NMI from CPU 1 to CPUs 0: [ 286.544030][ C0] NMI backtrace for cpu 0 [ 286.544039][ C0] CPU: 0 PID: 91 Comm: kworker/u4:4 Not tainted 6.0.0-rc2-next-20220826-syzkaller #0 [ 286.544060][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.544072][ C0] Workqueue: events_unbound toggle_allocation_gate [ 286.544095][ C0] RIP: 0010:kasan_check_range+0xde/0x180 [ 286.544127][ C0] Code: 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 80 38 00 <74> f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c 2c eb 0c [ 286.544146][ C0] RSP: 0018:ffffc900015b79a8 EFLAGS: 00000246 [ 286.544160][ C0] RAX: fffff520002b6f4f RBX: fffff520002b6f5d RCX: ffffffff842a1802 [ 286.544173][ C0] RDX: fffff520002b6f5d RSI: 0000000000000070 RDI: ffffc900015b7a78 [ 286.544186][ C0] RBP: fffff520002b6f4f R08: 0000000000000001 R09: ffffc900015b7ae7 [ 286.544199][ C0] R10: fffff520002b6f5c R11: 0000000000000001 R12: 0000000000000070 [ 286.544211][ C0] R13: 0000000000000000 R14: 1ffff920002b6f49 R15: ffffffff89e6ad6a [ 286.544224][ C0] FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 286.544240][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.544253][ C0] CR2: 000055a1a3d6aab8 CR3: 000000000bc8e000 CR4: 00000000003506f0 [ 286.544266][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.544277][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.544289][ C0] Call Trace: [ 286.544293][ C0] [ 286.544300][ C0] memset+0x20/0x40 [ 286.544317][ C0] insn_init+0x32/0x190 [ 286.544335][ C0] insn_decode+0x2b8/0x3b0 [ 286.544352][ C0] ? kmem_cache_alloc_bulk+0x1f1/0x860 [ 286.544378][ C0] text_poke_loc_init+0xa6/0x450 [ 286.544398][ C0] ? arch_jump_label_transform_queue+0x58/0x100 [ 286.544429][ C0] ? text_poke_memcpy+0x10/0x10 [ 286.544449][ C0] ? kmem_cache_alloc_bulk+0x1f1/0x860 [ 286.544474][ C0] ? kmem_cache_alloc_bulk+0x200/0x860 [ 286.544498][ C0] ? kmem_cache_alloc_bulk+0x1f6/0x860 [ 286.544524][ C0] ? kmem_cache_alloc_bulk+0x1f1/0x860 [ 286.544549][ C0] ? __jump_label_patch+0x173/0x330 [ 286.544577][ C0] arch_jump_label_transform_queue+0x94/0x100 [ 286.544609][ C0] __jump_label_update+0x12e/0x410 [ 286.544652][ C0] jump_label_update+0x32f/0x410 [ 286.544678][ C0] static_key_disable_cpuslocked+0x152/0x1b0 [ 286.544706][ C0] static_key_disable+0x16/0x20 [ 286.544730][ C0] toggle_allocation_gate+0x183/0x390 [ 286.544750][ C0] ? lock_release+0x780/0x780 [ 286.544774][ C0] ? wake_up_kfence_timer+0x20/0x20 [ 286.544793][ C0] ? trace_hardirqs_on+0x2d/0x120 [ 286.544812][ C0] ? finish_task_switch.isra.0+0x2b5/0xc80 [ 286.544834][ C0] ? read_word_at_a_time+0xe/0x20 [ 286.544855][ C0] ? strscpy+0xa1/0x2a0 [ 286.544876][ C0] process_one_work+0x991/0x1610 [ 286.544906][ C0] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 286.544935][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 286.544957][ C0] ? _raw_spin_lock_irq+0x41/0x50 [ 286.544979][ C0] worker_thread+0x665/0x1080 [ 286.545009][ C0] ? __kthread_parkme+0x15f/0x220 [ 286.545030][ C0] ? process_one_work+0x1610/0x1610 [ 286.545057][ C0] kthread+0x2e4/0x3a0 [ 286.545078][ C0] ? kthread_complete_and_exit+0x40/0x40 [ 286.545103][ C0] ret_from_fork+0x1f/0x30 [ 286.545134][ C0] [ 286.545141][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.110 msecs [ 286.546100][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 286.883937][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-next-20220826-syzkaller #0 [ 286.893231][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.903300][ T28] Call Trace: [ 286.906579][ T28] [ 286.909509][ T28] dump_stack_lvl+0xcd/0x134 [ 286.914117][ T28] panic+0x2c8/0x627 [ 286.918047][ T28] ? panic_print_sys_info.part.0+0x10b/0x10b [ 286.924322][ T28] ? lapic_can_unplug_cpu+0x80/0x80 [ 286.929559][ T28] ? preempt_schedule_thunk+0x16/0x18 [ 286.934947][ T28] ? watchdog.cold+0x135/0x426 [ 286.939733][ T28] watchdog.cold+0x146/0x426 [ 286.944330][ T28] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 286.950327][ T28] kthread+0x2e4/0x3a0 [ 286.954404][ T28] ? kthread_complete_and_exit+0x40/0x40 [ 286.960058][ T28] ret_from_fork+0x1f/0x30 [ 286.964492][ T28] [ 286.967658][ T28] Kernel Offset: disabled [ 286.971979][ T28] Rebooting in 86400 seconds..