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| author | Michael Niedermayer | 2019-10-29 19:12:23 +0100 |
|---|---|---|
| committer | Michael Niedermayer | 2019-12-31 19:51:56 +0100 |
| commit | afd3574959914c4496edafcc51b26eea19f7fe3c (patch) | |
| tree | 9ff4cb68b5d08689096d694cd87f87a9cd049b90 | |
| parent | f75b377857d34b6e797d918eae4625e387b27950 (diff) | |
avcodec/iff: Move index use after check in decodeplane8()
Fixes: index 9 out of bounds for type 'const uint64_t [8][256]'
Fixes: 18409/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-5767030560522240
Fixes: 18720/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-5651995784642560
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 a1f8b36cc45406f66aac635a4db32d2a5cc29f43)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/iff.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavcodec/iff.c b/libavcodec/iff.c index 500f9bf367..0656ae5509 100644 --- a/libavcodec/iff.c +++ b/libavcodec/iff.c @@ -456,11 +456,12 @@ static av_cold int decode_init(AVCodecContext *avctx) */ static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane) { - const uint64_t *lut = plane8_lut[plane]; + const uint64_t *lut; if (plane >= 8) { av_log(NULL, AV_LOG_WARNING, "Ignoring extra planes beyond 8\n"); return; } + lut = plane8_lut[plane]; do { uint64_t v = AV_RN64A(dst) | lut[*buf++]; AV_WN64A(dst, v); |