har0ke/FFmpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

avformat/webpenc: Check filesize in trailer

Browse Source 
not sure this is possible

Fixes: CID1604446 Overflowed constant

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7734c583f777fdba2f6463cf525385ebe5cf10db)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-07-11 22:13:42 +02:00
parent 591680a0cf
commit 2248217d42
No known key found for this signature in database
GPG Key ID: B18E8928B3948D64
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavformat/webpenc.c
View File

@ -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);