avcodec/wmalosslessdec: deallocate uninitialized frame on decode_tilehdr() failure

Fixes use of uninitialized memory
partly fixes: msan_uninit-mem_7f7834b6a530_6473_luckynight-partial.wma
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit ae3856dcaf9c5ef339969c95a72bcaf7c4bba9ec)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c
index 6386930..8487af9 100644 (file)
--- a/libavcodec/wmalosslessdec.c
+++ b/libavcodec/wmalosslessdec.c
@@ -1040,6 +1040,7 @@ static int decode_frame(WmallDecodeCtx *s)
     /* decode tile information */
     if ((ret = decode_tilehdr(s))) {
         s->packet_loss = 1;
+        av_frame_unref(s->frame);
         return ret;
     }