[SRU][F][PATCH 0/1] CVE-2021-46926

[Bethany Jamison]

[Impact]

ALSA: hda: intel-sdw-acpi: harden detection of controller

The existing code currently sets a pointer to an ACPI handle before
checking that it's actually a SoundWire controller. This can lead to
issues where the graph walk continues and eventually fails, but the
pointer was set already.

This patch changes the logic so that the information provided to
the caller is set when a controller is found.

[Fix]

Noble:	not affected
Jammy:	not affected
Focal: 	Backported - context conflict due to commits 6d2c666 (soundwire: 
	intel: transition to 3 steps initialization) and 08c2a4b (ALSA: 
	hda: move Intel SoundWire ACPI scan to dedicated module) which 
	could not be applied, fix change implemented as given 
Bionic:	not affected
Xenial: not affected
Trusty: not affected

[Test Case]

Compile and boot tested.

[Where problems could occur]

This fix affects those who use Intel SoundWire, an issue with this fix
would be visible to the user via unpredicted system behavior.

Libin Yang (1):
  ALSA: hda: intel-sdw-acpi: harden detection of controller

 drivers/soundwire/intel_init.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

-- 
2.34.1