Fixes: CID1604592 Overflowed constant
Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <[email protected]>
---
libavformat/sauce.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/libavformat/sauce.c b/libavformat/sauce.c
index 150be4705b5..55d288d3aea 100644
--- a/libavformat/sauce.c
+++ b/libavformat/sauce.c
@@ -34,7 +34,12 @@ int ff_sauce_read(AVFormatContext *avctx, uint64_t *fsize,
int *got_width, int g
AVIOContext *pb = avctx->pb;
char buf[36];
int datatype, filetype, t1, t2, nb_comments;
- uint64_t start_pos = avio_size(pb) - 128;
+ int64_t start_pos = avio_size(pb);
+
+ if (start_pos <= 0)
+ return AVERROR_INVALIDDATA;
+
+ start_pos -= 128;
avio_seek(pb, start_pos, SEEK_SET);
if (avio_read(pb, buf, 7) != 7)
--
2.45.2
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