kernel/linux.git/sound/hda/codecs/side-codecs/hda_component.c, branch linux-7.0.y

ALSA: hda: Fix missing pointer check in hda_component_manager_init function

2025-10-11T06:28:52+00:00

The __component_match_add function may assign the 'matchptr' pointer the value ERR_PTR(-ENOMEM), which will subsequently be dereferenced. The call stack leading to the error looks like this: hda_component_manager_init |-> component_match_add |-> component_match_add_release |-> __component_match_add ( ... ,**matchptr, ... ) |-> *matchptr = ERR_PTR(-ENOMEM); // assign |-> component_master_add_with_match( ... match) |-> component_match_realloc(match, match->num); // dereference Add IS_ERR() check to prevent the crash. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: ae7abe36e352 ("ALSA: hda/realtek: Add CS35L41 support for Thinkpad laptops") Cc: stable@vger.kernel.org Signed-off-by: Denis Arefev Signed-off-by: Takashi Iwai

ALSA: hda/component: Use guard() for mutex locks

2025-08-29T09:52:15+00:00

Replace the manual mutex lock/unlock pairs with guard(). Only code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250827072916.31933-16-tiwai@suse.de

ALSA: hda: Move codec drivers into sound/hda/codecs directory

2025-07-11T07:55:37+00:00

Now move the all remaining codec drivers from sound/pci/hda to sound/hda/codecs subdirectory. Some drivers are put under the further vendor subdirectory, and the vendor helper code (*_helper.c) are put under helpers subdirectory. Also the sub-codec drivers are moved under a different subdirectory, sound/hda/codecs/sub-codecs, for distinguishing from the main HD-audio codec drivers. The prefix patch_ and hda_ as well as the suffix _helper are dropped from file names as they are mostly superfluous. No functional changes but just file path shuffling. Reviewed-by: Richard Fitzgerald Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250709160434.1859-7-tiwai@suse.de