[FFmpeg-devel] [PATCH 7/8] avcodec/svq3: Check that for 8 byte space before subtracting

[Michael Niedermayer]

No testcase

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavcodec/svq3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index f730358e2f9..30bc9334af7 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -1173,7 +1173,7 @@ static av_cold int svq3_decode_init(AVCodecContext *avctx)
         int w,h;
 
         size = AV_RB32(&extradata[4]);
-        if (size > extradata_end - extradata - 8)
+        if (extradata_end - extradata < 8 || size > extradata_end - extradata - 8)
             return AVERROR_INVALIDDATA;
         init_get_bits(&gb, extradata + 8, size * 8);
 
-- 
2.49.0