avformat/4xm: shrink packet if it was only partially initialized

Fixes use of uninitialized memory Fixes: msan_uninit-mem_7f6c76ab7950_4920_dracula.4xm Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
11 years ago · 9b195dd579
parent 2c635fabbf
commit 9b195dd579
1 changed files with 3 additions and 1 deletions
--- a/libavformat/4xm.c
+++ b/libavformat/4xm.c
@ -319,8 +319,10 @@ static int fourxm_read_packet(AVFormatContext *s,

            if (ret < 0) {
                av_free_packet(pkt);
-            } else
+            } else {
                packet_read = 1;
+                av_shrink_packet(pkt, ret + 8);
+            }
            break;

        case snd__TAG: