ffmpeg | branch: release/3.2 | Michael Niedermayer <mich...@niedermayer.cc> | Mon Aug 20 22:19:23 2018 +0200| [2df51ffcb7f2f1ee14715e28793ef549b0a7f565] | committer: Michael Niedermayer
avcodec/vb: Check for end of bytestream before reading blocktype Fixes: Timeout Fixes: 9601/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VB_fuzzer-4550228702134272 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 1cbac9ce20d32806febf64cbd9f830e1485695ca) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2df51ffcb7f2f1ee14715e28793ef549b0a7f565 --- libavcodec/vb.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/vb.c b/libavcodec/vb.c index 021657f7d8..c6dd6fb456 100644 --- a/libavcodec/vb.c +++ b/libavcodec/vb.c @@ -107,6 +107,10 @@ static int vb_decode_framedata(VBDecContext *c, int offset) blk2 = 0; for (blk = 0; blk < blocks; blk++) { if (!(blk & 3)) { + if (bytestream2_get_bytes_left(&g) < 1) { + av_log(c->avctx, AV_LOG_ERROR, "Insufficient data\n"); + return AVERROR_INVALIDDATA; + } blocktypes = bytestream2_get_byte(&g); } switch (blocktypes & 0xC0) { _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
