ALSA: hda - Fix potential endless loop at applying quirks

commit 333f31436d3db19f4286f8862a00ea1d8d8420a1 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: 1f57825077dc ("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>

diff --git a/sound/pci/hda/hda_auto_parser.c b/sound/pci/hda/hda_auto_parser.c
index d3ea73171a3d22a2e41554e7df8d1fedc72a9751..8b1cf237b96ec4c4458f1471b250e071d0af1f30 100644 (file)
--- a/sound/pci/hda/hda_auto_parser.c
+++ b/sound/pci/hda/hda_auto_parser.c
@@ -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;
        }
 }