./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor449659077 <...> forked to background, child pid [ 23.237510][ T3188] 8021q: adding VLAN 0 to HW filter on device bond0 3187 no interfaces have a carrier [ 23.254885][ T3188] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.100' (ECDSA) to the list of known hosts. execve("./syz-executor449659077", ["./syz-executor449659077"], 0x7ffc64d95c70 /* 10 vars */) = 0 brk(NULL) = 0x5555560d7000 brk(0x5555560d7c40) = 0x5555560d7c40 arch_prctl(ARCH_SET_FS, 0x5555560d7300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor449659077", 4096) = 27 brk(0x5555560f8c40) = 0x5555560f8c40 brk(0x5555560f9000) = 0x5555560f9000 mprotect(0x7f75bc87c000, 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./strace-static-x86_64: Process 3610 attached , child_tidptr=0x5555560d75d0) = 3610 [pid 3610] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3610] setpgid(0, 0) = 0 [pid 3610] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 3610] write(3, "1000", 4) = 4 [pid 3610] close(3) = 0 [pid 3610] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY|O_APPEND|O_DIRECT|O_NOATIME) = 3 [pid 3610] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 4 [pid 3610] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0 [pid 3610] ioctl(4, NBD_SET_SOCK, 5) = 0 [pid 3610] ioctl(3, NBD_SET_SIZE_BLOCKS, 2047) = 0 syzkaller login: [ 39.374358][ T3610] nbd0: detected capacity change from 0 to 4094 [pid 3610] ioctl(3, NBD_DO_IT [pid 3609] kill(-3610, SIGKILL) = 0 [pid 3609] kill(3610, SIGKILL [pid 3610] <... ioctl resumed>) = ? [pid 3609] <... kill resumed>) = 0 [ 44.338270][ T3610] block nbd0: shutting down sockets [pid 3609] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 3609] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 3609] getdents64(3, 0x5555560d8620 /* 2 entries */, 32768) = 48 [pid 3609] getdents64(3, 0x5555560d8620 /* 0 entries */, 32768) = 0 [pid 3609] close(3) = 0 [ 69.833249][ T9] block nbd0: Possible stuck request ffff88801dba8000: control (read@0,4096B). Runtime 30 seconds [ 76.233596][ T143] cfg80211: failed to load regulatory.db [ 99.913256][ T9] block nbd0: Possible stuck request ffff88801dba8000: control (read@0,4096B). Runtime 60 seconds [ 101.637997][ T2975] udevd[2975]: worker [3612] /devices/virtual/block/nbd0 is taking a long time [ 129.993357][ T9] block nbd0: Possible stuck request ffff88801dba8000: control (read@0,4096B). Runtime 90 seconds [ 160.073221][ T9] block nbd0: Possible stuck request ffff88801dba8000: control (read@0,4096B). Runtime 120 seconds [ 190.153278][ T9] block nbd0: Possible stuck request ffff88801dba8000: control (read@0,4096B). Runtime 150 seconds [ 220.233173][ T9] block nbd0: Possible stuck request ffff88801dba8000: control (read@0,4096B). Runtime 180 seconds [ 222.367440][ T2975] udevd[2975]: worker [3612] /devices/virtual/block/nbd0 timeout; kill it [ 222.376178][ T2975] udevd[2975]: seq 7480 '/devices/virtual/block/nbd0' killed [ 250.313276][ T9] block nbd0: Possible stuck request ffff88801dba8000: control (read@0,4096B). Runtime 210 seconds [ 280.393146][ T9] block nbd0: Possible stuck request ffff88801dba8000: control (read@0,4096B). Runtime 240 seconds [ 286.153192][ T28] INFO: task syz-executor449:3610 blocked for more than 143 seconds. [ 286.161288][ T28] Not tainted 6.0.0-rc2-next-20220823-syzkaller #0 [ 286.168443][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.177163][ T28] task:syz-executor449 state:D stack:28024 pid:3610 ppid:3609 flags:0x00004006 [ 286.187313][ T28] Call Trace: [ 286.190595][ T28] [ 286.193643][ T28] __schedule+0xae5/0x52c0 [ 286.198172][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 286.203145][ T28] ? rcu_read_lock_sched_held+0xd/0x70 [ 286.208612][ T28] ? lock_release+0x560/0x780 [ 286.213319][ T28] ? io_schedule_timeout+0x140/0x140 [ 286.218612][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 286.223575][ T28] schedule+0xda/0x1b0 [ 286.227653][ T28] schedule_preempt_disabled+0xf/0x20 [ 286.233044][ T28] __mutex_lock+0xa44/0x1350 [ 286.237648][ T28] ? blkdev_put+0xbc/0x770 [ 286.242119][ T28] ? mutex_lock_io_nested+0x1190/0x1190 [ 286.247729][ T28] ? locks_check_ctx_file_list+0x1d/0x110 [ 286.253484][ T28] ? trace_hardirqs_on+0x2d/0x120 [ 286.258500][ T28] ? do_raw_spin_unlock+0x171/0x230 [ 286.263726][ T28] ? _raw_spin_unlock+0x24/0x40 [ 286.268594][ T28] ? locks_remove_file+0x2f7/0x570 [ 286.273731][ T28] blkdev_put+0xbc/0x770 [ 286.277987][ T28] blkdev_close+0x64/0x80 [ 286.282307][ T28] __fput+0x27c/0xa90 [ 286.286333][ T28] ? blkdev_fsync+0xa0/0xa0 [ 286.290859][ T28] task_work_run+0xdd/0x1a0 [ 286.295404][ T28] do_exit+0xc3f/0x2b60 [ 286.299583][ T28] ? rcu_read_lock_sched_held+0xd/0x70 [ 286.305079][ T28] ? lock_release+0x560/0x780 [ 286.309760][ T28] ? lock_downgrade+0x6e0/0x6e0 [ 286.314633][ T28] ? get_signal+0x93b/0x2610 [ 286.319233][ T28] ? mm_update_next_owner+0x7b0/0x7b0 [ 286.324636][ T28] ? do_raw_spin_lock+0x120/0x2a0 [ 286.329670][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 286.334632][ T28] do_group_exit+0xd0/0x2a0 [ 286.339144][ T28] get_signal+0x238c/0x2610 [ 286.343678][ T28] ? map_id_up+0x178/0x2f0 [ 286.348211][ T28] ? exit_signals+0x8b0/0x8b0 [ 286.352877][ T28] ? lock_release+0x560/0x780 [ 286.357576][ T28] ? __task_pid_nr_ns+0x168/0x4b0 [ 286.362623][ T28] ? lock_downgrade+0x6e0/0x6e0 [ 286.367500][ T28] arch_do_signal_or_restart+0x82/0x2300 [ 286.373183][ T28] ? from_kuid+0xc0/0xc0 [ 286.377439][ T28] ? __task_pid_nr_ns+0x18a/0x4b0 [ 286.382474][ T28] ? get_sigframe_size+0x10/0x10 [ 286.387486][ T28] ? ptrace_notify+0xfa/0x140 [ 286.392531][ T28] ? lock_downgrade+0x6e0/0x6e0 [ 286.397433][ T28] ? send_sig+0xfe/0x160 [ 286.401729][ T28] ? send_sig_info+0x140/0x140 [ 286.406537][ T28] ? trace_hardirqs_on+0x2d/0x120 [ 286.411593][ T28] exit_to_user_mode_prepare+0x15f/0x250 [ 286.417320][ T28] syscall_exit_to_user_mode+0x19/0x50 [ 286.422949][ T28] do_syscall_64+0x42/0xb0 [ 286.427418][ T28] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 286.433353][ T28] RIP: 0033:0x7f75bc80f6b9 [ 286.437755][ T28] RSP: 002b:00007fffe8cefa28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 286.446190][ T28] RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 00007f75bc80f6b9 [ 286.454197][ T28] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 [ 286.462157][ T28] RBP: 0000000000000000 R08: 00007fffe8cefbc8 R09: 00007fffe8cefbc8 [ 286.470168][ T28] R10: 00007fffe8cefbc8 R11: 0000000000000246 R12: 00007f75bc7ce740 [ 286.478220][ T28] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 286.486229][ T28] [ 286.489259][ T28] NMI backtrace for cpu 1 [ 286.493576][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-next-20220823-syzkaller #0 [ 286.502837][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.512872][ T28] Call Trace: [ 286.516133][ T28] [ 286.519050][ T28] dump_stack_lvl+0xcd/0x134 [ 286.523709][ T28] nmi_cpu_backtrace.cold+0x46/0x14f [ 286.529013][ T28] ? lapic_can_unplug_cpu+0x80/0x80 [ 286.534226][ T28] nmi_trigger_cpumask_backtrace+0x206/0x250 [ 286.540239][ T28] watchdog+0xcf7/0xfd0 [ 286.544417][ T28] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 286.550475][ T28] kthread+0x2e4/0x3a0 [ 286.554552][ T28] ? kthread_complete_and_exit+0x40/0x40 [ 286.560192][ T28] ret_from_fork+0x1f/0x30 [ 286.564628][ T28] [ 286.567728][ T28] Sending NMI from CPU 1 to CPUs 0: [ 286.572950][ C0] NMI backtrace for cpu 0 [ 286.572961][ C0] CPU: 0 PID: 41 Comm: kworker/u4:2 Not tainted 6.0.0-rc2-next-20220823-syzkaller #0 [ 286.572982][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.572997][ C0] Workqueue: events_unbound toggle_allocation_gate [ 286.573025][ C0] RIP: 0010:insn_get_opcode.part.0+0xba/0x990 [ 286.573099][ C0] Code: 38 d0 7f 08 84 c0 0f 85 93 07 00 00 48 8d 73 18 0f b6 6d 00 4c 89 63 68 48 b8 00 00 00 00 00 fc ff df 48 89 f2 48 89 74 24 18 <83> e6 07 48 c1 ea 03 0f b6 04 02 41 89 ed 40 38 f0 7f 08 84 c0 0f [ 286.573117][ C0] RSP: 0018:ffffc90000b27900 EFLAGS: 00000246 [ 286.573131][ C0] RAX: dffffc0000000000 RBX: ffffc90000b27a78 RCX: 0000000000000000 [ 286.573144][ C0] RDX: ffffc90000b27a90 RSI: ffffc90000b27a90 RDI: ffffc90000b27a78 [ 286.573157][ C0] RBP: 000000000000000f R08: 0000000000000005 R09: 0000000000000000 [ 286.573168][ C0] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff89e6ad6b [ 286.573180][ C0] R13: 0000000000000000 R14: 1ffff92000164f49 R15: ffffffff89e6ad6a [ 286.573192][ C0] FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 286.573211][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.573223][ C0] CR2: 000055b9e9c77680 CR3: 000000000bc8e000 CR4: 00000000003506f0 [ 286.573236][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.573246][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.573258][ C0] Call Trace: [ 286.573262][ C0] [ 286.573268][ C0] ? insn_get_prefixes.part.0+0x577/0x1200 [ 286.573303][ C0] insn_get_modrm+0x355/0x7c0 [ 286.573333][ C0] insn_get_sib+0x29c/0x330 [ 286.573363][ C0] insn_get_displacement+0x346/0x6c0 [ 286.573394][ C0] insn_decode+0x35b/0x3b0 [ 286.573422][ C0] ? __kmalloc+0xce/0x340 [ 286.573442][ C0] text_poke_loc_init+0xa6/0x450 [ 286.573462][ C0] ? arch_jump_label_transform_queue+0x58/0x100 [ 286.573493][ C0] ? text_poke_memcpy+0x10/0x10 [ 286.573516][ C0] ? __kmalloc+0xce/0x340 [ 286.573536][ C0] ? __jump_label_patch+0x173/0x330 [ 286.573565][ C0] arch_jump_label_transform_queue+0x94/0x100 [ 286.573596][ C0] __jump_label_update+0x12e/0x410 [ 286.573623][ C0] jump_label_update+0x32f/0x410 [ 286.573649][ C0] static_key_disable_cpuslocked+0x152/0x1b0 [ 286.573674][ C0] static_key_disable+0x16/0x20 [ 286.573697][ C0] toggle_allocation_gate+0x183/0x390 [ 286.573715][ C0] ? lock_release+0x780/0x780 [ 286.573736][ C0] ? wake_up_kfence_timer+0x20/0x20 [ 286.573753][ C0] ? trace_hardirqs_on+0x2d/0x120 [ 286.573772][ C0] ? finish_task_switch.isra.0+0x2b5/0xc80 [ 286.573794][ C0] ? read_word_at_a_time+0xe/0x20 [ 286.573813][ C0] ? strscpy+0xa1/0x2a0 [ 286.573832][ C0] process_one_work+0x991/0x1610 [ 286.573863][ C0] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 286.573892][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 286.573918][ C0] worker_thread+0x665/0x1080 [ 286.573947][ C0] ? __kthread_parkme+0x15f/0x220 [ 286.573968][ C0] ? process_one_work+0x1610/0x1610 [ 286.573995][ C0] kthread+0x2e4/0x3a0 [ 286.574021][ C0] ? kthread_complete_and_exit+0x40/0x40 [ 286.574045][ C0] ret_from_fork+0x1f/0x30 [ 286.574077][ C0] [ 286.574083][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.133 msecs [ 286.574971][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 286.574981][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-next-20220823-syzkaller #0 [ 286.575006][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 286.575018][ T28] Call Trace: [ 286.575024][ T28] [ 286.575031][ T28] dump_stack_lvl+0xcd/0x134 [ 286.575064][ T28] panic+0x2c8/0x627 [ 286.575102][ T28] ? panic_print_sys_info.part.0+0x10b/0x10b [ 286.575133][ T28] ? lapic_can_unplug_cpu+0x80/0x80 [ 286.575164][ T28] ? preempt_schedule_thunk+0x16/0x18 [ 286.575199][ T28] ? watchdog.cold+0x135/0x426 [ 286.575252][ T28] watchdog.cold+0x146/0x426 [ 286.575291][ T28] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 286.575329][ T28] kthread+0x2e4/0x3a0 [ 286.575354][ T28] ? kthread_complete_and_exit+0x40/0x40 [ 286.575384][ T28] ret_from_fork+0x1f/0x30 [ 286.575421][ T28] [ 286.578613][ T28] Kernel Offset: disabled [ 286.989164][ T28] Rebooting in 86400 seconds..