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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-08-22 20:31:32 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-08-28 22:06:44 +0200 |
| commit | bcb46903040e5a5199281f4ad0a1fdaf750ebc37 (patch) | |
| tree | 8072d86e3273c9389576b1fc817da098e2dc32c1 /libavformat | |
| parent | 936f2d2634b57071579221d604062019028f8c9b (diff) | |
| download | ffmpeg-bcb46903040e5a5199281f4ad0a1fdaf750ebc37.tar.gz | |
libavformat/iff: Check for overflow in body_end calculation
Fixes: signed integer overflow: -6322983228386819992 - 5557477266266529857 cannot be represented in type 'long'
Fixes: 50112/clusterfuzz-testcase-minimized-ffmpeg_dem_IFF_fuzzer-6329186221948928
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/iff.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/iff.c b/libavformat/iff.c index b37600605a..b8e8bffe03 100644 --- a/libavformat/iff.c +++ b/libavformat/iff.c @@ -501,6 +501,9 @@ static int iff_read_header(AVFormatContext *s) case ID_DST: case ID_MDAT: iff->body_pos = avio_tell(pb); + if (iff->body_pos < 0 || iff->body_pos + data_size > INT64_MAX) + return AVERROR_INVALIDDATA; + iff->body_end = iff->body_pos + data_size; iff->body_size = data_size; if (chunk_id == ID_DST) { |