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| author | Michael Niedermayer <michael@niedermayer.cc> | 2024-07-11 22:13:42 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2024-07-21 17:02:12 +0200 |
| commit | 7734c583f777fdba2f6463cf525385ebe5cf10db (patch) | |
| tree | c263bdb0e827db06619373ec66a1c6badaaa8acb | |
| parent | be30913538d4be9a50672ceb683f8745d8aa75a9 (diff) | |
| download | ffmpeg-7734c583f777fdba2f6463cf525385ebe5cf10db.tar.gz | |
avformat/webpenc: Check filesize in trailer
not sure this is possible
Fixes: CID1604446 Overflowed constant
Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/webpenc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/webpenc.c b/libavformat/webpenc.c index 1c5b93e0ab..ce0d046aa9 100644 --- a/libavformat/webpenc.c +++ b/libavformat/webpenc.c @@ -190,7 +190,7 @@ static int webp_write_trailer(AVFormatContext *s) if (!ret) { filesize = avio_tell(s->pb); - if (avio_seek(s->pb, 4, SEEK_SET) == 4) { + if (filesize >= 8 && avio_seek(s->pb, 4, SEEK_SET) == 4) { avio_wl32(s->pb, filesize - 8); // Note: without the following, avio only writes 8 bytes to the file. avio_seek(s->pb, filesize, SEEK_SET); |