INFO: task kworker/u5:1:17918 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211102-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u5:1 state:D stack:26992 pid:17918 ppid: 2 flags:0x00004000
Workqueue: hci6 scan_update_work
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6397
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
hci_req_sync net/bluetooth/hci_request.c:209 [inline]
scan_update_work+0x26/0xb0 net/bluetooth/hci_request.c:1987
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task systemd-rfkill:8491 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211102-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:systemd-rfkill state:D stack:26368 pid: 8491 ppid: 1 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
__flush_work+0x56c/0xb10 kernel/workqueue.c:3084
__cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3171
hci_request_cancel_all+0x44/0x130 net/bluetooth/hci_request.c:2869
hci_dev_close_sync+0xa1/0x10b0 net/bluetooth/hci_sync.c:3970
hci_dev_do_close+0x32/0x70 net/bluetooth/hci_core.c:553
hci_rfkill_set_block+0x19c/0x1d0 net/bluetooth/hci_core.c:935
rfkill_set_block+0x1f9/0x540 net/rfkill/core.c:344
rfkill_fop_write+0x41a/0x500 net/rfkill/core.c:1276
vfs_write+0x28e/0xae0 fs/read_write.c:588
ksys_write+0x1ee/0x250 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f55547121b0
RSP: 002b:00007ffeca746f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000055dd09323040 RCX: 00007f55547121b0
RDX: 0000000000000008 RSI: 00007ffeca746fa0 RDI: 0000000000000003
RBP: 00007ffeca746f98 R08: 0000000000000003 R09: 0000000000001010
R10: 000000000001b0c0 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffeca746f90 R14: 0000000000000000 R15: 0000000000000003
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
3 locks held by kworker/u5:1/17918:
#0: ffff88804a4df938 ((wq_completion)hci6){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88804a4df938 ((wq_completion)hci6){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88804a4df938 ((wq_completion)hci6){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88804a4df938 ((wq_completion)hci6){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88804a4df938 ((wq_completion)hci6){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88804a4df938 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc90009de7db0 ((work_completion)(&hdev->scan_update)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffff88807c51d0d8 (&hdev->req_lock){+.+.}-{3:3}, at: hci_req_sync net/bluetooth/hci_request.c:209 [inline]
#2: ffff88807c51d0d8 (&hdev->req_lock){+.+.}-{3:3}, at: scan_update_work+0x26/0xb0 net/bluetooth/hci_request.c:1987
2 locks held by systemd-rfkill/8491:
#0: ffffffff8d6d6d28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0xff/0x500 net/rfkill/core.c:1260
#1: ffff88807c51d0d8 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x2a/0x70 net/bluetooth/hci_core.c:551
2 locks held by syz-executor.2/8580:
#0: ffffffff8c5c0e68 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
#1: ffffffff8d6d6d28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_open+0x10d/0x720 net/rfkill/core.c:1148
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-next-20211102-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+0x405/0x4f0 kernel/kthread.c:327
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: 2932 Comm: systemd-journal Not tainted 5.15.0-next-20211102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1169 [inline]
RIP: 0010:rcu_lockdep_current_cpu_online+0x5c/0x150 kernel/rcu/tree.c:1160
Code: 03 00 83 f8 07 89 c5 0f 87 f5 00 00 00 48 8d 3c ed a0 48 54 8b 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 ad 00 00 00 48 03 1c ed a0 48 54 8b 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc90001b6fe08 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 000000000003a900 RCX: ffffffff815cdc31
RDX: 1ffffffff16a8915 RSI: 0000000000000002 RDI: ffffffff8b5448a8
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8d8efe57
R10: fffffbfff1b1dfca R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f390514c8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f39029e4000 CR3: 000000007aaaf000 CR4: 00000000003506e0
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
rcu_read_lock_held_common kernel/rcu/update.c:102 [inline]
rcu_read_lock_sched_held+0x25/0x70 kernel/rcu/update.c:123
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x522/0x720 kernel/locking/lockdep.c:5648
do_write_seqcount_end include/linux/seqlock.h:565 [inline]
vtime_user_enter+0xea/0x170 kernel/sched/cputime.c:712
__context_tracking_enter+0xef/0x100 kernel/context_tracking.c:82
user_enter_irqoff include/linux/context_tracking.h:41 [inline]
__exit_to_user_mode kernel/entry/common.c:130 [inline]
syscall_exit_to_user_mode+0x48/0x60 kernel/entry/common.c:302
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f39046db840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007ffdefcf84d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: fffffffffffffffe RBX: 00007ffdefcf87e0 RCX: 00007f39046db840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055e2f63e4020
RBP: 000000000000000d R08: 000000000000c0c1 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000055e2f63d6040 R14: 00007ffdefcf87a0 R15: 000055e2f63e3e40
----------------
Code disassembly (best guess):
0: 03 00 add (%rax),%eax
2: 83 f8 07 cmp $0x7,%eax
5: 89 c5 mov %eax,%ebp
7: 0f 87 f5 00 00 00 ja 0x102
d: 48 8d 3c ed a0 48 54 lea -0x74abb760(,%rbp,8),%rdi
14: 8b
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 48 89 fa mov %rdi,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
* 2a: 0f 85 ad 00 00 00 jne 0xdd <-- trapping instruction
30: 48 03 1c ed a0 48 54 add -0x74abb760(,%rbp,8),%rbx
37: 8b
38: 48 rex.W
39: b8 00 00 00 00 mov $0x0,%eax
3e: 00 fc add %bh,%ah