ffmpeg | branch: master | Michael Niedermayer <[email protected]> | Mon Jun 22 00:09:05 2020 +0200| [cf0c700b0c25f5d9fe50dd27086a06812822f11a] | committer: Michael Niedermayer
avformat/avidec: Fix io_fsize overflow Fixes: signed integer overflow: 7958120835074169528 * 9 cannot be represented in type 'long long' Fixes: 23382/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-6230683226996736 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cf0c700b0c25f5d9fe50dd27086a06812822f11a --- libavformat/avidec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/avidec.c b/libavformat/avidec.c index 5fc3e01aa9..df677a1618 100644 --- a/libavformat/avidec.c +++ b/libavformat/avidec.c @@ -439,7 +439,7 @@ static int calculate_bitrate(AVFormatContext *s) maxpos = FFMAX(maxpos, st->index_entries[j-1].pos); lensum += len; } - if (maxpos < avi->io_fsize*9/10) // index does not cover the whole file + if (maxpos < av_rescale(avi->io_fsize, 9, 10)) // index does not cover the whole file return 0; if (lensum*9/10 > maxpos || lensum < maxpos*9/10) // frame sum and filesize mismatch return 0; _______________________________________________ ffmpeg-cvslog mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
