ffmpeg | branch: master | Michael Niedermayer <[email protected]> | Thu Feb 23 23:46:30 2017 +0100| [0d85c7bb5a4c398863848ecdf44a0c9f1778da06] | committer: Michael Niedermayer
avcodec/ituh263dec: Fix runtime error: left shift of 1342177279 by 1 places cannot be represented in type 'int' Fixes: 659/clusterfuzz-testcase-5866673603084288 Huge DMV could be created by an encoder ignoring the spec Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0d85c7bb5a4c398863848ecdf44a0c9f1778da06 --- libavcodec/ituh263dec.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c index 9a2c8e6..09b6a2f 100644 --- a/libavcodec/ituh263dec.c +++ b/libavcodec/ituh263dec.c @@ -303,6 +303,10 @@ static int h263p_decode_umotion(MpegEncContext * s, int pred) { code <<= 1; code += get_bits1(&s->gb); + if (code >= 32768) { + avpriv_request_sample(s->avctx, "Huge DMV"); + return AVERROR_INVALIDDATA; + } } sign = code & 1; code >>= 1; _______________________________________________ ffmpeg-cvslog mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
