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ALSA: hda - potential (but unlikely) uninitialized variable

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This function is a bit unusual because it accepts negative values as
"conn_len".  It's theoretically possible for both "cache_len" and
"conn_len" to be -ENOSPC and in that case we would oops trying to run
memcmp() on the uninitialized "list" pointer.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Dan Carpenter 2015-04-17 16:19:46 +03:00 committed by Takashi Iwai
parent 7d4b5e978a
commit f4d7703179
1 changed files with 2 additions and 2 deletions
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4
sound/pci/hda/hda_proc.c
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@ -582,8 +582,8 @@ static void print_conn_list(struct snd_info_buffer *buffer,
/* Get Cache connections info */
cache_len = snd_hda_get_conn_list(codec, nid, &list);
if (cache_len != conn_len
|| memcmp(list, conn, conn_len)) {
if (cache_len >= 0 && (cache_len != conn_len ||
memcmp(list, conn, conn_len) != 0)) {
snd_iprintf(buffer, " In-driver Connection: %d\n", cache_len);
if (cache_len > 0) {
snd_iprintf(buffer, " ");