[FFmpeg-devel] [PATCH 5/8] Reject audio tracks with invalid interleaver parameters in RM demuxer.

[fenrir at elivagar.org]

From: Laurent Aimar <fenrir at videolan.org>

---
 libavformat/rmdec.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c
index 1c96573..81f563e 100644
--- a/libavformat/rmdec.c
+++ b/libavformat/rmdec.c
@@ -215,8 +215,9 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
             ast->audio_framesize = st->codec->block_align;
             st->codec->block_align = coded_framesize;
 
-            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
-                av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
+            if (ast->audio_framesize <= 0 || sub_packet_h <= 0 ||
+                ast->audio_framesize >= UINT_MAX / sub_packet_h){
+                av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h is invalid\n");
                 return -1;
             }
 
@@ -252,8 +253,9 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
             if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
                 return ret;
 
-            if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
-                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
+            if (ast->audio_framesize <= 0 || sub_packet_h <= 0 ||
+                ast->audio_framesize >= UINT_MAX / sub_packet_h){
+                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h is invalid\n");
                 return -1;
             }
 
-- 
1.7.2.5