./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1612066894

<...>
Warning: Permanently added '10.128.1.28' (ECDSA) to the list of known hosts.
execve("./syz-executor1612066894", ["./syz-executor1612066894"], 0x7ffeceded360 /* 10 vars */) = 0
brk(NULL)                               = 0x555555a1d000
brk(0x555555a1dc40)                     = 0x555555a1dc40
arch_prctl(ARCH_SET_FS, 0x555555a1d300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor1612066894", 4096) = 28
brk(0x555555a3ec40)                     = 0x555555a3ec40
brk(0x555555a3f000)                     = 0x555555a3f000
mprotect(0x7fe965de0000, 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=0x555555a1d5d0) = 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] socketpair(AF_UNIX, SOCK_STREAM, 0, [5, 6]) = 0
[pid  3609] ioctl(4, NBD_SET_SOCK, 5)   = 0
[pid  3609] ioctl(3, NBD_SET_SIZE_BLOCKS, 17) = 0
syzkaller login: [   38.331649][ T3609] nbd0: detected capacity change from 0 to 34
[pid  3609] ioctl(4, NBD_DO_IT <unfinished ...>
[pid  3608] kill(-3609, SIGKILL)        = 0
[pid  3608] kill(3609, SIGKILL <unfinished ...>
[pid  3609] <... ioctl resumed>)        = ?
[pid  3608] <... kill resumed>)         = 0
[   43.266535][ 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, 0x555555a1e620 /* 2 entries */, 32768) = 48
[pid  3608] getdents64(3, 0x555555a1e620 /* 0 entries */, 32768) = 0
[pid  3608] close(3)                    = 0
[   68.510558][    T9] block nbd0: Possible stuck request ffff88801e878000: control (read@0,4096B). Runtime 30 seconds
[   76.190706][   T14] cfg80211: failed to load regulatory.db
[   98.395255][ T2974] udevd[2974]: worker [3611] /devices/virtual/block/nbd0 is taking a long time
[   98.590241][    T9] block nbd0: Possible stuck request ffff88801e878000: control (read@0,4096B). Runtime 60 seconds
[  128.670263][    T9] block nbd0: Possible stuck request ffff88801e878000: control (read@0,4096B). Runtime 90 seconds
[  158.750193][    T9] block nbd0: Possible stuck request ffff88801e878000: control (read@0,4096B). Runtime 120 seconds
[  188.830255][    T9] block nbd0: Possible stuck request ffff88801e878000: control (read@0,4096B). Runtime 150 seconds
[  218.910186][    T9] block nbd0: Possible stuck request ffff88801e878000: control (read@0,4096B). Runtime 180 seconds
[  219.320345][ T2974] udevd[2974]: worker [3611] /devices/virtual/block/nbd0 timeout; kill it
[  219.329186][ T2974] udevd[2974]: seq 7481 '/devices/virtual/block/nbd0' killed
[  248.990269][    T9] block nbd0: Possible stuck request ffff88801e878000: control (read@0,4096B). Runtime 210 seconds
[  279.070189][    T9] block nbd0: Possible stuck request ffff88801e878000: control (read@0,4096B). Runtime 240 seconds
[  286.110203][   T28] INFO: task syz-executor161:3609 blocked for more than 143 seconds.
[  286.118373][   T28]       Not tainted 6.0.0-rc3-next-20220829-syzkaller #0
[  286.125454][   T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  286.134147][   T28] task:syz-executor161 state:D stack:28128 pid:3609  ppid:3608   flags:0x00004006
[  286.143443][   T28] Call Trace:
[  286.146735][   T28]  <TASK>
[  286.149662][   T28]  __schedule+0xae5/0x52c0
[  286.154203][   T28]  ? rwlock_bug.part.0+0x90/0x90
[  286.159161][   T28]  ? rcu_read_lock_sched_held+0xd/0x70
[  286.164652][   T28]  ? lock_release+0x560/0x780
[  286.169334][   T28]  ? io_schedule_timeout+0x140/0x140
[  286.174662][   T28]  ? rwlock_bug.part.0+0x90/0x90
[  286.179612][   T28]  schedule+0xda/0x1b0
[  286.183715][   T28]  schedule_preempt_disabled+0xf/0x20
[  286.189101][   T28]  __mutex_lock+0xa44/0x1350
[  286.193741][   T28]  ? blkdev_put+0xbc/0x770
[  286.198235][   T28]  ? mutex_lock_io_nested+0x1190/0x1190
[  286.203829][   T28]  ? locks_check_ctx_file_list+0x1d/0x110
[  286.209579][   T28]  ? trace_hardirqs_on+0x2d/0x120
[  286.214632][   T28]  ? do_raw_spin_unlock+0x171/0x230
[  286.219839][   T28]  ? _raw_spin_unlock+0x24/0x40
[  286.224718][   T28]  ? locks_remove_file+0x2f7/0x570
[  286.229838][   T28]  blkdev_put+0xbc/0x770
[  286.234113][   T28]  blkdev_close+0x64/0x80
[  286.238505][   T28]  __fput+0x27c/0xa90
[  286.242513][   T28]  ? blkdev_fsync+0xa0/0xa0
[  286.247026][   T28]  task_work_run+0x16b/0x270
[  286.251656][   T28]  ? task_work_cancel+0x30/0x30
[  286.256518][   T28]  ? do_raw_spin_unlock+0x171/0x230
[  286.261764][   T28]  do_exit+0xc3f/0x2b60
[  286.265934][   T28]  ? rcu_read_lock_sched_held+0xd/0x70
[  286.271569][   T28]  ? lock_release+0x560/0x780
[  286.276273][   T28]  ? lock_downgrade+0x6e0/0x6e0
[  286.281155][   T28]  ? get_signal+0x93b/0x2610
[  286.285760][   T28]  ? mm_update_next_owner+0x7b0/0x7b0
[  286.291163][   T28]  ? do_raw_spin_lock+0x120/0x2a0
[  286.296197][   T28]  ? rwlock_bug.part.0+0x90/0x90
[  286.301163][   T28]  do_group_exit+0xd0/0x2a0
[  286.305693][   T28]  get_signal+0x238c/0x2610
[  286.310224][   T28]  ? map_id_up+0x178/0x2f0
[  286.314653][   T28]  ? exit_signals+0x8b0/0x8b0
[  286.319321][   T28]  ? lock_release+0x560/0x780
[  286.324027][   T28]  ? __task_pid_nr_ns+0x168/0x4b0
[  286.329069][   T28]  ? lock_downgrade+0x6e0/0x6e0
[  286.333976][   T28]  arch_do_signal_or_restart+0x82/0x2300
[  286.339625][   T28]  ? from_kuid+0xc0/0xc0
[  286.344014][   T28]  ? __task_pid_nr_ns+0x18a/0x4b0
[  286.349063][   T28]  ? get_sigframe_size+0x10/0x10
[  286.354041][   T28]  ? ptrace_notify+0xfa/0x140
[  286.358756][   T28]  ? lock_downgrade+0x6e0/0x6e0
[  286.363637][   T28]  ? send_sig+0xfe/0x160
[  286.367889][   T28]  ? send_sig_info+0x140/0x140
[  286.372676][   T28]  ? trace_hardirqs_on+0x2d/0x120
[  286.377713][   T28]  exit_to_user_mode_prepare+0x15f/0x250
[  286.383426][   T28]  syscall_exit_to_user_mode+0x19/0x50
[  286.388906][   T28]  do_syscall_64+0x42/0xb0
[  286.393440][   T28]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[  286.399352][   T28] RIP: 0033:0x7fe965d736a9
[  286.403823][   T28] RSP: 002b:00007fff9603c618 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  286.412265][   T28] RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 00007fe965d736a9
[  286.420266][   T28] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000004
[  286.428243][   T28] RBP: 0000000000000000 R08: 00007fff9603c7b8 R09: 00007fff9603c7b8
[  286.436241][   T28] R10: 00007fff9603c7b8 R11: 0000000000000246 R12: 00007fe965d32730
[  286.444240][   T28] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[  286.452236][   T28]  </TASK>
[  286.455304][   T28] NMI backtrace for cpu 1
[  286.459644][   T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc3-next-20220829-syzkaller #0
[  286.468918][   T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
[  286.478957][   T28] Call Trace:
[  286.482221][   T28]  <TASK>
[  286.485152][   T28]  dump_stack_lvl+0xcd/0x134
[  286.489813][   T28]  nmi_cpu_backtrace.cold+0x46/0x14f
[  286.495094][   T28]  ? lapic_can_unplug_cpu+0x80/0x80
[  286.500302][   T28]  nmi_trigger_cpumask_backtrace+0x206/0x250
[  286.506294][   T28]  watchdog+0xcf7/0xfd0
[  286.510454][   T28]  ? proc_dohung_task_timeout_secs+0x80/0x80
[  286.516446][   T28]  kthread+0x2e4/0x3a0
[  286.520518][   T28]  ? kthread_complete_and_exit+0x40/0x40
[  286.526155][   T28]  ret_from_fork+0x1f/0x30
[  286.530592][   T28]  </TASK>
[  286.533702][   T28] Sending NMI from CPU 1 to CPUs 0:
[  286.538969][    C0] NMI backtrace for cpu 0
[  286.538980][    C0] CPU: 0 PID: 56 Comm: kworker/u4:4 Not tainted 6.0.0-rc3-next-20220829-syzkaller #0
[  286.539000][    C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
[  286.539011][    C0] Workqueue: events_unbound toggle_allocation_gate
[  286.539034][    C0] RIP: 0010:insn_get_prefixes.part.0+0x8f6/0x1200
[  286.539072][    C0] Code: df 48 89 fa 48 c1 ea 03 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 34 08 00 00 48 8b 04 24 48 8d 78 04 c6 40 14 01 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 48
[  286.539088][    C0] RSP: 0018:ffffc90001577910 EFLAGS: 00000246
[  286.539102][    C0] RAX: ffffc90001577a78 RBX: 0000000000000000 RCX: 0000000000000000
[  286.539113][    C0] RDX: 0000000000000004 RSI: ffffffff842a086b RDI: ffffc90001577a7c
[  286.539126][    C0] RBP: ffffc90001577acb R08: 0000000000000005 R09: 0000000000000002
[  286.539136][    C0] R10: 00000000fffffff3 R11: 0000000000000001 R12: 000000000000000f
[  286.539147][    C0] R13: 00000000fffffff3 R14: 000000000000000f R15: 000000000000001f
[  286.539158][    C0] FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
[  286.539175][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  286.539187][    C0] CR2: 00007fffc892e438 CR3: 000000000bc8e000 CR4: 00000000003506f0
[  286.539199][    C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  286.539209][    C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  286.539220][    C0] Call Trace:
[  286.539225][    C0]  <TASK>
[  286.539234][    C0]  insn_get_modrm+0x646/0x7c0
[  286.539254][    C0]  insn_get_sib+0x29c/0x330
[  286.539271][    C0]  insn_get_displacement+0x346/0x6c0
[  286.539290][    C0]  insn_decode+0x35b/0x3b0
[  286.539306][    C0]  ? kmem_cache_alloc+0x120/0x3d0
[  286.539329][    C0]  text_poke_loc_init+0xa6/0x450
[  286.539347][    C0]  ? arch_jump_label_transform_queue+0x58/0x100
[  286.539374][    C0]  ? text_poke_memcpy+0x10/0x10
[  286.539397][    C0]  ? kmem_cache_alloc+0x120/0x3d0
[  286.539417][    C0]  ? __jump_label_patch+0x173/0x330
[  286.539443][    C0]  arch_jump_label_transform_queue+0x94/0x100
[  286.539471][    C0]  __jump_label_update+0x12e/0x410
[  286.539496][    C0]  jump_label_update+0x32f/0x410
[  286.539520][    C0]  static_key_disable_cpuslocked+0x152/0x1b0
[  286.539543][    C0]  static_key_disable+0x16/0x20
[  286.539565][    C0]  toggle_allocation_gate+0x183/0x390
[  286.539584][    C0]  ? lock_release+0x780/0x780
[  286.539603][    C0]  ? wake_up_kfence_timer+0x20/0x20
[  286.539621][    C0]  ? trace_hardirqs_on+0x2d/0x120
[  286.539639][    C0]  ? finish_task_switch.isra.0+0x2b5/0xc80
[  286.539660][    C0]  ? read_word_at_a_time+0xe/0x20
[  286.539680][    C0]  ? strscpy+0xa1/0x2a0
[  286.539698][    C0]  process_one_work+0x991/0x1610
[  286.539727][    C0]  ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[  286.539752][    C0]  ? rwlock_bug.part.0+0x90/0x90
[  286.539776][    C0]  worker_thread+0x665/0x1080
[  286.539802][    C0]  ? __kthread_parkme+0x15f/0x220
[  286.539822][    C0]  ? process_one_work+0x1610/0x1610
[  286.539846][    C0]  kthread+0x2e4/0x3a0
[  286.539865][    C0]  ? kthread_complete_and_exit+0x40/0x40
[  286.539887][    C0]  ret_from_fork+0x1f/0x30
[  286.539916][    C0]  </TASK>
[  286.539964][   T28] Kernel panic - not syncing: hung_task: blocked tasks
[  286.853847][   T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc3-next-20220829-syzkaller #0
[  286.863125][   T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
[  286.873172][   T28] Call Trace:
[  286.876447][   T28]  <TASK>
[  286.879373][   T28]  dump_stack_lvl+0xcd/0x134
[  286.883973][   T28]  panic+0x2c8/0x627
[  286.887894][   T28]  ? panic_print_sys_info.part.0+0x110/0x110
[  286.893875][   T28]  ? irq_work_claim+0x76/0x90
[  286.898552][   T28]  ? lapic_can_unplug_cpu+0x80/0x80
[  286.903752][   T28]  ? irq_work_queue+0x29/0x80
[  286.908427][   T28]  ? watchdog.cold+0x135/0x426
[  286.913204][   T28]  watchdog.cold+0x146/0x426
[  286.917796][   T28]  ? proc_dohung_task_timeout_secs+0x80/0x80
[  286.923784][   T28]  kthread+0x2e4/0x3a0
[  286.927852][   T28]  ? kthread_complete_and_exit+0x40/0x40
[  286.933487][   T28]  ret_from_fork+0x1f/0x30
[  286.937914][   T28]  </TASK>
[  286.940985][   T28] Kernel Offset: disabled
[  286.945305][   T28] Rebooting in 86400 seconds..