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avcodec/cbs_jpeg: Fix uninitialized end index in cbs_jpeg_split_fragment()

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Fixes: Out of array read
Fixes: 24043/clusterfuzz-testcase-minimized-ffmpeg_BSF_TRACE_HEADERS_fuzzer-5084566275751936.fuzz

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-07-10 19:37:57 +02:00
parent ed5ee04722
commit 4a10bc8f6f
1 changed files with 1 additions and 0 deletions
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libavcodec/cbs_jpeg.c
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@ -149,6 +149,7 @@ static int cbs_jpeg_split_fragment(CodedBitstreamContext *ctx,
break;
} else if (marker == JPEG_MARKER_SOS) {
next_marker = -1;
end = start;
for (i = start; i + 1 < frag->data_size; i++) {
if (frag->data[i] != 0xff)
continue;