ALSA: hda: Fix missing pointer check in hda_component_manager_init function

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[ Upstream commit 1cf11d80db ]

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: ae7abe36e3 ("ALSA: hda/realtek: Add CS35L41 support for Thinkpad laptops")
Cc: stable@vger.kernel.org
Signed-off-by: Denis Arefev <arefev@swemel.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
[ Modified the source code path due to 6.12 doesn't have
commit:6014e9021b28 ("ALSA: hda: Move codec drivers into sound/hda/codecs directory
") ]
Signed-off-by: Rajani Kantha <681739313@139.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Denis Arefev 2025-11-14 11:28:09 +08:00 • committed by Greg Kroah-Hartman

parent 3010739f53

commit 218a8504e6

1 changed files with 4 additions and 0 deletions

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sound/pci/hda/hda_component.c

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