[FFmpeg-cvslog] avformat/tta: Better totalframes check
Michael Niedermayer
git at videolan.org
Mon Oct 9 00:00:52 EEST 2023
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Sep 30 21:28:55 2023 +0200| [5f0d00464a50994de0993e045e09313ca8d7cc8f] | committer: Michael Niedermayer
avformat/tta: Better totalframes check
Fixes: signed integer overflow: 4 * 740491135 cannot be represented in type 'int'
Fixes: 51896/clusterfuzz-testcase-minimized-ffmpeg_dem_TTA_fuzzer-6298893367508992
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5f0d00464a50994de0993e045e09313ca8d7cc8f
---
libavformat/tta.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/tta.c b/libavformat/tta.c
index 2183045940..5477654014 100644
--- a/libavformat/tta.c
+++ b/libavformat/tta.c
@@ -91,7 +91,7 @@ static int tta_read_header(AVFormatContext *s)
c->totalframes = nb_samples / c->frame_size + (c->last_frame_size < c->frame_size);
c->currentframe = 0;
- if(c->totalframes >= UINT_MAX/sizeof(uint32_t) || c->totalframes <= 0){
+ if(c->totalframes >= (INT_MAX - 4)/sizeof(uint32_t) || c->totalframes <= 0){
av_log(s, AV_LOG_ERROR, "totalframes %d invalid\n", c->totalframes);
return AVERROR_INVALIDDATA;
}
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