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.
My static checker complains about this.
Signed-off-by: Dan Carpenter dan.carpenter@oracle.com
diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c index ce5a6da..387fdfc 100644 --- a/sound/pci/hda/hda_proc.c +++ b/sound/pci/hda/hda_proc.c @@ -556,8 +556,8 @@ 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, " ");