INFO: task syz-executor303:3608 blocked for more than 143 seconds.
      Not tainted 6.0.0-rc2-next-20220826-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor303 state:D stack:28176 pid:3608  ppid:3607   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5197 [inline]
 __schedule+0xae5/0x52c0 kernel/sched/core.c:6509
 schedule+0xda/0x1b0 kernel/sched/core.c:6585
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6644
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
 blkdev_put+0xbc/0x770 block/bdev.c:910
 blkdev_close+0x64/0x80 block/fops.c:499
 __fput+0x27c/0xa90 fs/file_table.c:320
 task_work_run+0x16b/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xc3f/0x2b60 kernel/exit.c:818
 do_group_exit+0xd0/0x2a0 kernel/exit.c:948
 get_signal+0x238c/0x2610 kernel/signal.c:2858
 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
 exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd6636cc6a9
RSP: 002b:00007ffde8205a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 00007fd6636cc6a9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006
RBP: 0000000000000000 R08: 00007ffde8205bc8 R09: 00007ffde8205bc8
R10: 000000000000ffff R11: 0000000000000246 R12: 00007fd66368b730
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-next-20220826-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:227 [inline]
 watchdog+0xcf7/0xfd0 kernel/hung_task.c:384
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 6.0.0-rc2-next-20220826-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:200
Code: 81 e1 00 01 00 00 65 48 8b 14 25 80 6f 02 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 94 15 00 00 85 c0 74 2b 8b 82 70 15 00 00 <83> f8 02 75 20 48 8b 8a 78 15 00 00 8b 92 74 15 00 00 48 8b 01 48
RSP: 0018:ffffc900000d7a08 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900000d7a78 RCX: 0000000000000000
RDX: ffff88813fe557c0 RSI: ffffffff842a310d RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff89e6ad6a
R13: 000000000000000f R14: 1ffff9200001af49 R15: ffffffff89e6ad6a
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b39e622680 CR3: 000000000bc8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 insn_get_length arch/x86/lib/insn.c:706 [inline]
 insn_decode+0x9d/0x3b0 arch/x86/lib/insn.c:747
 text_poke_loc_init+0xa6/0x450 arch/x86/kernel/alternative.c:1580
 arch_jump_label_transform_queue+0x94/0x100 arch/x86/kernel/jump_label.c:138
 __jump_label_update+0x12e/0x410 kernel/jump_label.c:447
 jump_label_update+0x32f/0x410 kernel/jump_label.c:801
 static_key_disable_cpuslocked+0x152/0x1b0 kernel/jump_label.c:207
 static_key_disable+0x16/0x20 kernel/jump_label.c:215
 toggle_allocation_gate mm/kfence/core.c:825 [inline]
 toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:803
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>