Luiz Augusto von Dentz f1a8f402f1 Bluetooth: L2CAP: Fix deadlock ... This fixes the following deadlock introduced by 39a92a55be ("bluetooth/l2cap: sync sock recv cb and release") ============================================ WARNING: possible recursive locking detected 6.10.0-rc3-g4029dba6b6f1 #6823 Not tainted -------------------------------------------- kworker/u5:0/35 is trying to acquire lock: ffff888002ec2510 (&chan->lock#2/1){+.+.}-{3:3}, at: l2cap_sock_recv_cb+0x44/0x1e0 but task is already holding lock: ffff888002ec2510 (&chan->lock#2/1){+.+.}-{3:3}, at: l2cap_get_chan_by_scid+0xaf/0xd0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&chan->lock#2/1); lock(&chan->lock#2/1); *** DEADLOCK *** May be due to missing lock nesting notation 3 locks held by kworker/u5:0/35: #0: ffff888002b8a940 ((wq_completion)hci0#2){+.+.}-{0:0}, at: process_one_work+0x750/0x930 #1: ffff888002c67dd0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x44e/0x930 #2: ffff888002ec2510 (&chan->lock#2/1){+.+.}-{3:3}, at: l2cap_get_chan_by_scid+0xaf/0xd0 To fix the original problem this introduces l2cap_chan_lock at l2cap_conless_channel to ensure that l2cap_sock_recv_cb is called with chan->lock held. Fixes: 89e856e124 ("bluetooth/l2cap: sync sock recv cb and release") Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>		2024-06-28 14:32:02 -04:00
..
acpi	ACPI: EC: Evaluate orphan _REG under EC device	2024-06-13 11:28:54 +02:00
asm-generic	asm-generic cleanups for 6.10	2024-05-20 15:18:34 -07:00
clocksource
crypto	This push fixes a bug in the new ecc P521 code as well as a buggy	2024-05-20 08:47:54 -07:00
drm	Short summary of fixes pull:	2024-05-27 13:47:14 +10:00
dt-bindings	dt-bindings: net: dp8386x: Add MIT license along with GPL-2.0	2024-06-07 12:16:22 +01:00
keys
kunit
kvm
linux	net/mlx5: IFC updates for changing max EQs	2024-06-28 12:58:10 +01:00
math-emu
media
memory
misc
net	Bluetooth: L2CAP: Fix deadlock	2024-06-28 14:32:02 -04:00
pcmcia
ras	tracing/treewide: Remove second parameter of __assign_str()	2024-05-22 20:14:47 -04:00
rdma	The usual shower of singleton fixes and minor series all over MM,	2024-05-19 09:21:03 -07:00
rv
scsi	scsi: core: Introduce the BLIST_SKIP_IO_HINTS flag	2024-06-13 21:03:13 -04:00
soc	I'm actually surprised this time. There aren't any new Qualcomm SoC clk	2024-05-18 12:48:37 -07:00
sound	ALSA: dmaengine: Synchronize dma channel after drop()	2024-06-11 17:13:31 +01:00
target
trace	tracing/net_sched: NULL pointer dereference in perf_trace_qdisc_reset()	2024-06-27 11:06:30 +02:00
uapi	vfs-6.10-rc4.fixes	2024-06-11 12:04:21 -07:00
ufs
vdso
video
xen