[SRU][F/J/L][PATCH 0/1] CVE-2023-31083

[Yuxuan Luo]

[Impact]
An issue was discovered in drivers/bluetooth/hci_ldisc.c in the Linux
kernel 6.2. In hci_uart_tty_ioctl, there is a race condition between
HCIUARTSETPROTO and HCIUARTGETPROTO. HCI_UART_PROTO_SET is set before
hu->proto is set. A NULL pointer dereference may occur.

[Backport]
It is a clean cherry pick.

[Test]
Smoked tested via calling the `hcitool` command.

[Potential Regression]
Expect very low regression potential.

Lee, Chun-Yi (1):
  Bluetooth: hci_ldisc: check HCI_UART_PROTO_READY flag in
    HCIUARTGETPROTO

 drivers/bluetooth/hci_ldisc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

-- 
2.34.1