On Tue, 07 Oct 2025 10:39:57 +0200, Denis Arefev wrote:

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: fd895a74dc1d ("ALSA: hda: realtek: Move hda_component implementation to module") Cc: stable@vger.kernel.org Signed-off-by: Denis Arefev arefev@swemel.ru

Thanks for the patch.

The Fixes tag isn't 100% correct, though; the given commit just moves the code into another file, and the lack of the return value from component_match_add() was present even before that commit, too.

Takashi

---

sound/hda/codecs/side-codecs/hda_component.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/sound/hda/codecs/side-codecs/hda_component.c b/sound/hda/codecs/side-codecs/hda_component.c index 71860e2d6377..84ddbab660e3 100644 --- a/sound/hda/codecs/side-codecs/hda_component.c +++ b/sound/hda/codecs/side-codecs/hda_component.c @@ -181,6 +181,8 @@ int hda_component_manager_init(struct hda_codec *cdc, sm->match_str = match_str; sm->index = i; component_match_add(dev, &match, hda_comp_match_dev_name, sm);

• if (IS_ERR(match))
  

• 	return PTR_ERR(match);
  

  }

ret = component_master_add_with_match(dev, ops, match); -- 2.43.0