INFO: task krfcommd:2894 blocked for more than 143 seconds.
      Not tainted 5.14.0-rc5-next-20210811-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:krfcommd        state:D stack:29128 pid: 2894 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4698 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5955
 schedule+0xd3/0x270 kernel/sched/core.c:6034
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6093
 __mutex_lock_common kernel/locking/mutex.c:1036 [inline]
 __mutex_lock+0xa46/0x1300 kernel/locking/mutex.c:1096
 rfcomm_process_sessions net/bluetooth/rfcomm/core.c:1979 [inline]
 rfcomm_run+0x2ed/0x4a20 net/bluetooth/rfcomm/core.c:2086
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor732:6596 blocked for more than 143 seconds.
      Not tainted 5.14.0-rc5-next-20210811-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor732 state:D stack:28184 pid: 6596 ppid:  6564 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4698 [inline]
 __schedule+0x93a/0x26f0 kernel/sched/core.c:5955
 schedule+0xd3/0x270 kernel/sched/core.c:6034
 __lock_sock+0x13d/0x260 net/core/sock.c:2645
 lock_sock_nested+0xf6/0x120 net/core/sock.c:3178
 lock_sock include/net/sock.h:1612 [inline]
 rfcomm_sk_state_change+0xb4/0x390 net/bluetooth/rfcomm/sock.c:73
 __rfcomm_dlc_close+0x1b6/0x8a0 net/bluetooth/rfcomm/core.c:489
 rfcomm_dlc_close+0x1ea/0x240 net/bluetooth/rfcomm/core.c:520
 __rfcomm_sock_close+0xac/0x260 net/bluetooth/rfcomm/sock.c:220
 rfcomm_sock_shutdown+0xe9/0x210 net/bluetooth/rfcomm/sock.c:931
 rfcomm_sock_release+0x5f/0x140 net/bluetooth/rfcomm/sock.c:951
 __sock_release+0xcd/0x280 net/socket.c:649
 sock_close+0x18/0x20 net/socket.c:1311
 __fput+0x288/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0xbd4/0x2a60 kernel/exit.c:825
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x47f/0x2160 kernel/signal.c:2831
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x445fe9
RSP: 002b:00007ffd57efb998 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000445fe9
RDX: 0000000000000080 RSI: 00000000200001c0 RDI: 0000000000000004
RBP: 0000000000000003 R08: 000000ff00000001 R09: 000000ff00000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000015eb2b8
R13: 0000000000000072 R14: 00007ffd57efb9f0 R15: 0000000000000003
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210811-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline]
 watchdog+0xcb7/0xed0 kernel/hung_task.c:339
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 5.14.0-rc5-next-20210811-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:193
Code: ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 65 8b 05 a9 49 8c 7e 89 c1 <48> 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 f0 01 00 a9 00 01
RSP: 0018:ffffc90000cd7a00 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffffc90000cd7a68 RCX: 0000000080000000
RDX: 0000000000000000 RSI: ffff888011aed580 RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000002 R09: ffffc90000cd7aaf
R10: ffffffff83f4ac62 R11: 0000000000000000 R12: ffffffff81bae2c9
R13: 000000000000000f R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f59127a6010 CR3: 000000000b68e000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 insn_init arch/x86/lib/insn.c:66 [inline]
 insn_decode+0x2a5/0x4e0 arch/x86/lib/insn.c:742
 arch_jump_entry_size+0xa0/0x110 arch/x86/kernel/jump_label.c:24
 __jump_label_patch+0x7c/0x1b0 arch/x86/kernel/jump_label.c:45
 arch_jump_label_transform_queue+0x63/0x100 arch/x86/kernel/jump_label.c:137
 __jump_label_update+0x12e/0x400 kernel/jump_label.c:451
 jump_label_update+0x1d5/0x430 kernel/jump_label.c:830
 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:640 [inline]
 toggle_allocation_gate+0x185/0x390 mm/kfence/core.c:618
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2275
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2421
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.040 msecs