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ALSA: hda - Fix potential endless loop at applying quirks

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commit 333f31436d upstream.

Since the chained quirks via chained_before flag is applied before the
depth check, it may lead to the endless recursive calls, when the
chain were set up incorrectly.  Fix it by moving the depth check at
the beginning of the loop.

Fixes: 1f57825077 ("ALSA: hda - Add chained_before flag to the fixup entry")
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai
2019-08-29 09:52:02 +02:00
committed by Greg Kroah-Hartman
parent e2cd24b629
commit 3dd3ca376c
1 changed files with 2 additions and 2 deletions
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4
sound/pci/hda/hda_auto_parser.c
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@@ -828,6 +828,8 @@ static void apply_fixup(struct hda_codec *codec, int id, int action, int depth)
while (id >= 0) {
const struct hda_fixup *fix = codec->fixup_list + id;
if (++depth > 10)
break;
if (fix->chained_before)
apply_fixup(codec, fix->chain_id, action, depth + 1);
@@ -867,8 +869,6 @@ static void apply_fixup(struct hda_codec *codec, int id, int action, int depth)
}
if (!fix->chained || fix->chained_before)
break;
if (++depth > 10)
break;
id = fix->chain_id;
}
}