From 6801eb0a0981f113f5f09ed4799d9ae805af62a3 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 11 Aug 2014 02:16:43 +0200 Subject: [PATCH] avcodec/vc1dec: do not crash when flushing without an allocated frame Fixes Ticket3837 Found-by: Piotr Bandurski Signed-off-by: Michael Niedermayer --- libavcodec/vc1dec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c index 06deb7fad6..a73d6150b4 100644 --- a/libavcodec/vc1dec.c +++ b/libavcodec/vc1dec.c @@ -5514,7 +5514,7 @@ static void vc1_sprite_flush(AVCodecContext *avctx) Since we can't enforce it, clear to black the missing sprite. This is wrong but it looks better than doing nothing. */ - if (f->data[0]) + if (f && f->data[0]) for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++) for (i = 0; i < v->sprite_height>>!!plane; i++) memset(f->data[plane] + i * f->linesize[plane],