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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-05 22:23:15 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-16 01:05:29 +0200 |
| commit | 873397e27e9780fe29ad13acfebfc8070d7579d8 (patch) | |
| tree | 056e1b97fc377d83b67007bbf6f84338eb0c8b58 | |
| parent | 260a286e5308ce9e6e4585aa7347194d34e2cc19 (diff) | |
| download | ffmpeg-873397e27e9780fe29ad13acfebfc8070d7579d8.tar.gz | |
avcodec/mjpegdec: Check that reference frame matches the current frame
Fixes: out of array read
Fixes: 2097/clusterfuzz-testcase-minimized-5036861833609216
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 4705edbbb96e193f51c72248f508ae5693702a48)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mjpegdec.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index 6311fe7a94..d78db06e26 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -1475,6 +1475,15 @@ int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask, return -1; } + if (reference) { + if (reference->width != s->picture_ptr->width || + reference->height != s->picture_ptr->height || + reference->format != s->picture_ptr->format) { + av_log(s->avctx, AV_LOG_ERROR, "Reference mismatching\n"); + return AVERROR_INVALIDDATA; + } + } + av_assert0(s->picture_ptr->data[0]); /* XXX: verify len field validity */ len = get_bits(&s->gb, 16); |