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| author | Michael Niedermayer | 2019-11-18 09:45:29 +0100 |
|---|---|---|
| committer | Michael Niedermayer | 2019-12-31 19:51:57 +0100 |
| commit | ef722f7692a13d69bdf62befaaf5f504d1737fbc (patch) | |
| tree | 6d23e74ca9b6c195abfc26e27feb48b3e26c11e3 | |
| parent | 3c0fcc7779d3de5fedd68e02a26aa5ca43a7f5d1 (diff) | |
avcodec/iff: Skip overflowing runs in decode_delta_d()
Fixes: Timeout (107sec - 75ms>
Fixes: 18812/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-6295585225441280
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 185f441ba26a2112725db1e8f218e54ac8068bbb)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/iff.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/iff.c b/libavcodec/iff.c index 0656ae5509..267b09b6af 100644 --- a/libavcodec/iff.c +++ b/libavcodec/iff.c @@ -1359,6 +1359,8 @@ static void decode_delta_d(uint8_t *dst, bytestream2_seek_p(&pb, (offset / planepitch_byte) * pitch + (offset % planepitch_byte) + k * planepitch, SEEK_SET); if (opcode >= 0) { uint32_t x = bytestream2_get_be32(&gb); + if (opcode && 4 + (opcode - 1LL) * pitch > bytestream2_get_bytes_left_p(&pb)) + continue; while (opcode && bytestream2_get_bytes_left_p(&pb) > 0) { bytestream2_put_be32(&pb, x); bytestream2_skip_p(&pb, pitch - 4); |