audit: type=1326 audit(1692468246.458:334): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=21369 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f821e921b19 code=0x0
Bluetooth: hci6: link tx timeout
Bluetooth: hci6: killing stalled connection 11:aa:aa:aa:aa:aa
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 18820, name: kworker/u7:0
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
3 locks held by kworker/u7:0/18820:
 #0: ffff88800d283d38 ((wq_completion)hci6#2){+.+.}-{0:0}, at: process_one_work+0x69e/0x1450
 #1: ffff88803bdb7d98 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}, at: process_one_work+0x6d1/0x1450
 #2: ffffffff8560e8e0 (rcu_read_lock){....}-{1:2}, at: __check_timeout+0x171/0x480
CPU: 1 PID: 18820 Comm: kworker/u7:0 Not tainted 6.5.0-rc6-next-20230818 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Workqueue: hci6 hci_tx_work
Call Trace:
 <TASK>
 dump_stack_lvl+0xc1/0xf0
 __might_resched+0x2f9/0x510
 __mutex_lock+0x9e/0x1a30
 hci_cmd_sync_submit+0x3b/0x2d0
 hci_cmd_sync_queue+0x7b/0xb0
 hci_disconnect+0x1c2/0x450
 __check_timeout+0x2cc/0x480
 hci_tx_work+0x7cb/0x1a70
 process_one_work+0x7c8/0x1450
 worker_thread+0x80e/0x1190
 kthread+0x33f/0x440
 ret_from_fork+0x48/0x80
 ret_from_fork_asm+0x1b/0x30
 </TASK>

syz-executor.4[21384]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
=============================
[ BUG: Invalid wait context ]
6.5.0-rc6-next-20230818 #1 Tainted: G        W         
-----------------------------
kworker/u7:0/18820 is trying to lock:
ffff8880368749b0 (&hdev->unregister_lock){+.+.}-{3:3}, at: hci_cmd_sync_submit+0x3b/0x2d0
other info that might help us debug this:
loop4: detected capacity change from 0 to 63
context-{4:4}
3 locks held by kworker/u7:0/18820:
 #0: ffff88800d283d38 ((wq_completion)hci6#2){+.+.}-{0:0}, at: process_one_work+0x69e/0x1450
 #1: ffff88803bdb7d98 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}, at: process_one_work+0x6d1/0x1450
 #2: ffffffff8560e8e0 (rcu_read_lock){....}-{1:2}, at: __check_timeout+0x171/0x480
stack backtrace:
CPU: 1 PID: 18820 Comm: kworker/u7:0 Tainted: G        W          6.5.0-rc6-next-20230818 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Workqueue: hci6 hci_tx_work
Call Trace:
 <TASK>
 dump_stack_lvl+0x91/0xf0
 __lock_acquire+0x1605/0x6340
SELinux: security_context_str_to_sid (staff_u) failed with errno=-22
 lock_acquire+0x19a/0x4c0
 __mutex_lock+0x12a/0x1a30
 hci_cmd_sync_submit+0x3b/0x2d0
 hci_cmd_sync_queue+0x7b/0xb0
 hci_disconnect+0x1c2/0x450
 __check_timeout+0x2cc/0x480
 hci_tx_work+0x7cb/0x1a70
 process_one_work+0x7c8/0x1450
 worker_thread+0x80e/0x1190
 kthread+0x33f/0x440
 ret_from_fork+0x48/0x80
 ret_from_fork_asm+0x1b/0x30
 </TASK>
syz-executor.7[21399]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
loop7: detected capacity change from 0 to 8
FAT-fs (loop7): Unrecognized mount option "appraise_type=imasig" or missing value
syz-executor.7[21391]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
loop7: detected capacity change from 0 to 8
FAT-fs (loop7): Unrecognized mount option "appraise_type=imasig" or missing value
syz-executor.2[21411]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
loop2: detected capacity change from 0 to 264192
tmpfs: Bad value for 'nr_inodes'
syz-executor.2[21411]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
syz-executor.7[21417]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
loop7: detected capacity change from 0 to 264192
syz-executor.7[21420]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
loop7: detected capacity change from 0 to 264192
Bluetooth: hci6: command 0x0405 tx timeout
Bluetooth: hci6: command 0x0406 tx timeout
Bluetooth: hci6: command 0x0405 tx timeout