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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-22 00:09:05 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 21:34:53 +0200 |
| commit | 39adb150346f6f27b2ae290977b706f72699e20f (patch) | |
| tree | cec2b7caec671abeed89569a10073372a5b5f4e2 | |
| parent | 8fbc110d89bf9213db752fae460717a40726cdcc (diff) | |
| download | ffmpeg-39adb150346f6f27b2ae290977b706f72699e20f.tar.gz | |
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 <michael@niedermayer.cc>
(cherry picked from commit cf0c700b0c25f5d9fe50dd27086a06812822f11a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/avidec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/avidec.c b/libavformat/avidec.c index 26ff02bc21..fed74df171 100644 --- a/libavformat/avidec.c +++ b/libavformat/avidec.c @@ -442,7 +442,7 @@ 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; |