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linux/include/net/bluetooth
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Chris Lu 421e88a0d8 Bluetooth: btusb: mediatek: Fix kernel crash when releasing mtk iso interface 
[ Upstream commit 4015b97976 ]

When performing reset tests and encountering abnormal card drop issues
that lead to a kernel crash, it is necessary to perform a null check
before releasing resources to avoid attempting to release a null pointer.

<4>[   29.158070] Hardware name: Google Quigon sku196612/196613 board (DT)
<4>[   29.158076] Workqueue: hci0 hci_cmd_sync_work [bluetooth]
<4>[   29.158154] pstate: 20400009 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
<4>[   29.158162] pc : klist_remove+0x90/0x158
<4>[   29.158174] lr : klist_remove+0x88/0x158
<4>[   29.158180] sp : ffffffc0846b3c00
<4>[   29.158185] pmr_save: 000000e0
<4>[   29.158188] x29: ffffffc0846b3c30 x28: ffffff80cd31f880 x27: ffffff80c1bdc058
<4>[   29.158199] x26: dead000000000100 x25: ffffffdbdc624ea3 x24: ffffff80c1bdc4c0
<4>[   29.158209] x23: ffffffdbdc62a3e6 x22: ffffff80c6c07000 x21: ffffffdbdc829290
<4>[   29.158219] x20: 0000000000000000 x19: ffffff80cd3e0648 x18: 000000031ec97781
<4>[   29.158229] x17: ffffff80c1bdc4a8 x16: ffffffdc10576548 x15: ffffff80c1180428
<4>[   29.158238] x14: 0000000000000000 x13: 000000000000e380 x12: 0000000000000018
<4>[   29.158248] x11: ffffff80c2a7fd10 x10: 0000000000000000 x9 : 0000000100000000
<4>[   29.158257] x8 : 0000000000000000 x7 : 7f7f7f7f7f7f7f7f x6 : 2d7223ff6364626d
<4>[   29.158266] x5 : 0000008000000000 x4 : 0000000000000020 x3 : 2e7325006465636e
<4>[   29.158275] x2 : ffffffdc11afeff8 x1 : 0000000000000000 x0 : ffffffdc11be4d0c
<4>[   29.158285] Call trace:
<4>[   29.158290]  klist_remove+0x90/0x158
<4>[   29.158298]  device_release_driver_internal+0x20c/0x268
<4>[   29.158308]  device_release_driver+0x1c/0x30
<4>[   29.158316]  usb_driver_release_interface+0x70/0x88
<4>[   29.158325]  btusb_mtk_release_iso_intf+0x68/0xd8 [btusb (HASH:e8b6 5)]
<4>[   29.158347]  btusb_mtk_reset+0x5c/0x480 [btusb (HASH:e8b6 5)]
<4>[   29.158361]  hci_cmd_sync_work+0x10c/0x188 [bluetooth (HASH:a4fa 6)]
<4>[   29.158430]  process_scheduled_works+0x258/0x4e8
<4>[   29.158441]  worker_thread+0x300/0x428
<4>[   29.158448]  kthread+0x108/0x1d0
<4>[   29.158455]  ret_from_fork+0x10/0x20
<0>[   29.158467] Code: 91343000 940139d1 f9400268 927ff914 (f9401297)
<4>[   29.158474] ---[ end trace 0000000000000000 ]---
<0>[   29.167129] Kernel panic - not syncing: Oops: Fatal exception
<2>[   29.167144] SMP: stopping secondary CPUs
<4>[   29.167158] ------------[ cut here ]------------

Fixes: ceac1cb025 ("Bluetooth: btusb: mediatek: add ISO data transmission functions")
Signed-off-by: Chris Lu <chris.lu@mediatek.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-12-07 06:24:54 +09:00
..
bluetooth.h Bluetooth: SCO: Add support for 16 bits transparent voice setting 2024-12-19 18:13:20 +01:00
coredump.h Bluetooth: Add support for hci devcoredump 2023-04-23 21:57:59 -07:00
hci.h Bluetooth: HCI: Fix tracking of advertisement set/instance 0x00 2025-11-13 15:33:58 -05:00
hci_core.h Bluetooth: btusb: mediatek: Fix kernel crash when releasing mtk iso interface 2025-12-07 06:24:54 +09:00
hci_mon.h Bluetooth: hci_sock: Correctly bounds check and pad HCI_MON_NEW_INDEX name 2023-10-13 20:06:33 -07:00
hci_sock.h Bluetooth: hci_core: Prefer struct_size over open coded arithmetic 2024-07-14 21:33:29 -04:00
hci_sync.h Bluetooth: hci_sync: fix set_local_name race condition 2025-09-04 15:31:47 +02:00
iso.h Bluetooth: ISO: Add broadcast support 2022-07-22 17:14:13 -07:00
l2cap.h Bluetooth: L2CAP: Fix corrupted list in hci_chan_del 2025-03-22 12:54:28 -07:00
mgmt.h Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete 2025-11-24 10:36:08 +01:00
rfcomm.h tty: rfcomm: prefer struct_size over open coded arithmetic 2024-07-14 21:33:31 -04:00
sco.h Bluetooth: af_bluetooth: Make BT_PKT_STATUS generic 2023-08-11 11:49:16 -07:00