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avcodec/sgidec: do not forget the number of components in read_uncompressed_sgi()

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Fixes: out of array access
Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SGI_fuzzer-6704753329700864
Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SGI_fuzzer-6683986844057600
Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SGI_fuzzer-6697387691474944

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-01-12 00:16:01 +01:00
parent fc263f073e
commit 9f0602a717
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1 changed files with 1 additions and 1 deletions
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libavcodec/sgidec.c
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@ -159,7 +159,7 @@ static int read_uncompressed_sgi(uint8_t *const out[4], const ptrdiff_t stride[4
unsigned rowsize = width * bytes_per_channel;
/* Test buffer size. */
if (rowsize * (int64_t)height > bytestream2_get_bytes_left(g))
if (rowsize * (int64_t)height * nb_components > bytestream2_get_bytes_left(g))
return AVERROR_INVALIDDATA;
for (unsigned z = 0; z < nb_components; z++) {