ffmpeg | branch: release/3.3 | Michael Niedermayer <mich...@niedermayer.cc> | Sun Aug 12 22:43:33 2018 +0200| [488c246bf565d56f153874d1348435c7187679a1] | committer: Michael Niedermayer
avcodec/shorten: Check verbatim length Fixes: Timeout Fixes: 9252/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SHORTEN_fuzzer-5780720709533696 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit 7007dabec08f2f9f81661e71ef482dde394e17a8) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=488c246bf565d56f153874d1348435c7187679a1 --- libavcodec/shorten.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c index 68c2a2d804..010000d0a1 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -623,6 +623,11 @@ static int shorten_decode_frame(AVCodecContext *avctx, void *data, switch (cmd) { case FN_VERBATIM: len = get_ur_golomb_shorten(&s->gb, VERBATIM_CKSIZE_SIZE); + if (len < 0 || len > get_bits_left(&s->gb)) { + av_log(avctx, AV_LOG_ERROR, "verbatim length %d invalid\n", + len); + return AVERROR_INVALIDDATA; + } while (len--) get_ur_golomb_shorten(&s->gb, VERBATIM_BYTE_SIZE); break; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
