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avformat/sauce: Check avio_size() for failure

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Fixes: CID1604592 Overflowed constant

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 759aae590c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2024-07-11 20:49:08 +02:00
parent 358be1d9cb
commit 477d964e32
1 changed files with 6 additions and 1 deletions
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7
libavformat/sauce.c
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@@ -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 < 128)
return AVERROR_INVALIDDATA;
start_pos -= 128;
avio_seek(pb, start_pos, SEEK_SET);
if (avio_read(pb, buf, 7) != 7)