ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Tue Apr 2 02:18:34 2019 +0200| [af77adc02e4a814007c50d7fde6ef5e9837ca5a5] | committer: Michael Niedermayer
avcodec/qtrle: Check how much of the chunk is available before decoding Fixes: Timeout (10sec -> 2sec) Fixes: 13979/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QTRLE_fuzzer-5635157718990848 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=af77adc02e4a814007c50d7fde6ef5e9837ca5a5 --- libavcodec/qtrle.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/libavcodec/qtrle.c b/libavcodec/qtrle.c index 1613530e02..2c29547e5a 100644 --- a/libavcodec/qtrle.c +++ b/libavcodec/qtrle.c @@ -452,7 +452,7 @@ static int qtrle_decode_frame(AVCodecContext *avctx, int header, start_line; int height, row_ptr; int has_palette = 0; - int ret; + int ret, size; bytestream2_init(&s->g, avpkt->data, avpkt->size); @@ -461,7 +461,10 @@ static int qtrle_decode_frame(AVCodecContext *avctx, return avpkt->size; /* start after the chunk size */ - bytestream2_seek(&s->g, 4, SEEK_SET); + size = bytestream2_get_be32(&s->g) & 0x3FFFFFFF; + if (size - avpkt->size > size * (int64_t)avctx->discard_damaged_percentage / 100) + return AVERROR_INVALIDDATA; + /* fetch the header */ header = bytestream2_get_be16(&s->g); _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
