From 2d900d8fe0aaf9c984e024956eb537ecdfe2c949 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 6 Jul 2019 11:51:09 +0200 Subject: [PATCH] avcodec/dnxhd_parser: Fix parser when input does not have nicely sized packets 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 --- 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;