From b6f505ce0ae7bcb05a4ad118753407fd7d022829 Mon Sep 17 00:00:00 2001 From: Limin Wang Date: Sun, 28 Jun 2020 20:46:19 +0800 Subject: [PATCH] avcodec/mpeg12dec: Fix uninitialized data in fate-sub-cc-scte20 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The issue is introduced in a705bcd763e344fa, please tested with below command line: make V=1 fate-sub-cc-scte20 TARGET_EXEC="valgrind --error-exitcode=1" Reported-by: Martin Storsjö Reviewed-by: Martin Storsjö Signed-off-by: Limin Wang --- libavcodec/mpeg12dec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c index f0f92accf6..e9bdccc384 100644 --- a/libavcodec/mpeg12dec.c +++ b/libavcodec/mpeg12dec.c @@ -2276,6 +2276,8 @@ static int mpeg_decode_a53_cc(AVCodecContext *avctx, if (ret >= 0) { uint8_t field, cc1, cc2; uint8_t *cap = s1->a53_buf_ref->data; + + memset(s1->a53_buf_ref->data + old_size, 0, cc_count * 3); for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) { skip_bits(&gb, 2); // priority field = get_bits(&gb, 2);