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Message-ID: <20251007083959.7893-1-arefev@swemel.ru>
Date: Tue, 7 Oct 2025 11:39:57 +0300
From: Denis Arefev <arefev@...mel.ru>
To: David Rhodes <david.rhodes@...rus.com>
Cc: Richard Fitzgerald <rf@...nsource.cirrus.com>,
Jaroslav Kysela <perex@...ex.cz>,
Takashi Iwai <tiwai@...e.com>,
linux-sound@...r.kernel.org,
patches@...nsource.cirrus.com,
linux-kernel@...r.kernel.org,
lvc-project@...uxtesting.org,
stable@...r.kernel.org
Subject: [PATCH] ALSA: hda: Fix missing pointer check in hda_component_manager_init function
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@...r.kernel.org
Signed-off-by: Denis Arefev <arefev@...mel.ru>
---
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
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