[v3] Bluetooth: fix race during h4 bluetooth initialization

[PATCH v3 0/2] Bluetooth: fix race during h4 bluetooth initialization

Jonathan Rissanen posted 2 patches 6 days, 4 hours ago

Diff against v2
Download series mbox

drivers/bluetooth/hci_h4.c    | 3 ---
drivers/bluetooth/hci_ldisc.c | 3 +++
2 files changed, 3 insertions(+), 3 deletions(-)

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[PATCH v3 0/2] Bluetooth: fix race during h4 bluetooth initialization

Posted by Jonathan Rissanen 6 days, 4 hours ago

Hi,

This series fixes a race condition that causes hci events to sometimes
be ignored during h4 initialization.

The first patch clears the HCI_UART_PROTO_INIT bit if device
registration fails. This is needed to prevent the second patch from
introducing a possible null pointer dereference.

The second patch contains the fix for the race condition.

Signed-off-by: Jonathan Rissanen <jonathan.rissanen@axis.com>
---
Changes in v3:
- Add "Fixes:" tag to the commits.
- Link to v2: https://lore.kernel.org/r/20260326-hci-init-fix-v2-0-a974211d0224@axis.com

Changes in v2:
- Added a patch before the fix that prevents possible null pointer dereference
  from being introduced.
- Link to v1: https://lore.kernel.org/r/20260320-hci-init-fix-v1-1-e1960a41baf2@axis.com

---
Jonathan Rissanen (2):
      Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error
      Bluetooth: hci_h4: Fix race during initialization

 drivers/bluetooth/hci_h4.c    | 3 ---
 drivers/bluetooth/hci_ldisc.c | 3 +++
 2 files changed, 3 insertions(+), 3 deletions(-)
---
base-commit: 05f7e89ab9731565d8a62e3b5d1ec206485eeb0b
change-id: 20260303-hci-init-fix-9657128a0104

Best regards,
-- 
Jonathan Rissanen <jonathan.rissanen@axis.com>