[FFmpeg-devel] [PATCH 5/5] avcodec/dnxhd_parser: Fix parser when input does not have nicely sized packets
Michael Niedermayer
michael at niedermayer.cc
Sat Jul 6 13:57:49 EEST 2019
Fixes: out of array access
Fixes: 15522/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DNXHD_fuzzer-5747756078989312
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
libavcodec/dnxhd_parser.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavcodec/dnxhd_parser.c b/libavcodec/dnxhd_parser.c
index 31a3158fea..63b4ff89e1 100644
--- a/libavcodec/dnxhd_parser.c
+++ b/libavcodec/dnxhd_parser.c
@@ -79,8 +79,9 @@ static int dnxhd_find_frame_end(DNXHDParserContext *dctx,
if (remaining <= 0)
continue;
}
+ remaining += i - 47;
dctx->remaining = remaining;
- if (buf_size - i + 47 >= dctx->remaining) {
+ if (buf_size >= dctx->remaining) {
pc->frame_start_found = 0;
pc->state64 = -1;
dctx->cur_byte = 0;
--
2.22.0
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