ffmpeg | branch: release/4.3 | Michael Niedermayer <[email protected]> | Sun Jan 31 14:59:27 2021 +0100| [fc0453d3e4e04cad2d71dc19489abdfb9a39c66f] | committer: Michael Niedermayer
avcodec/hevc_sei: Check payload size in decode_nal_sei_message() Fixes: out of array access Fixes: 29392/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-4821602850177024.fuzz Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> (cherry picked from commit 0791a515d38fd35c1e2a309ec8f4015153687b8c) Signed-off-by: Michael Niedermayer <[email protected]> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fc0453d3e4e04cad2d71dc19489abdfb9a39c66f --- libavcodec/hevc_sei.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c index 60570690cf..b4b90b570b 100644 --- a/libavcodec/hevc_sei.c +++ b/libavcodec/hevc_sei.c @@ -343,6 +343,8 @@ static int decode_nal_sei_message(GetBitContext *gb, void *logctx, HEVCSEI *s, byte = get_bits(gb, 8); payload_size += byte; } + if (get_bits_left(gb) < 8LL*payload_size) + return AVERROR_INVALIDDATA; if (nal_unit_type == HEVC_NAL_SEI_PREFIX) { return decode_nal_sei_prefix(gb, logctx, s, ps, payload_type, payload_size); } else { /* nal_unit_type == NAL_SEI_SUFFIX */ _______________________________________________ ffmpeg-cvslog mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
