Vulnerability CVE-2024-35851
Published: 2024-05-17

Description:
In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: qca: fix NULL-deref on non-serdev suspend

Qualcomm ROME controllers can be registered from the Bluetooth line
discipline and in this case the HCI UART serdev pointer is NULL.

Add the missing sanity check to prevent a NULL-pointer dereference when
wakeup() is called for a non-serdev controller during suspend.

Just return true for now to restore the original behaviour and address
the crash with pre-6.2 kernels, which do not have commit e9b3e5b8c657
("Bluetooth: hci_qca: only assign wakeup with serial port support") that
causes the crash to happen already at setup() time.

 References:
https://git.kernel.org/stable/c/52f9041deaca3fc5c40ef3b9cb943993ec7d2489
https://git.kernel.org/stable/c/e60502b907be350c518819297b565007a94c706d
https://git.kernel.org/stable/c/6b47cdeb786c38e4174319218db3fa6d7b4bba88
https://git.kernel.org/stable/c/b64092d2f108f0cd1d7fd7e176f5fb2a67a2f189
https://git.kernel.org/stable/c/73e87c0a49fda31d7b589edccf4c72e924411371
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