From 11b6a82412bcd372adf694a26d83b07d337e1325 Mon Sep 17 00:00:00 2001 From: Mina Nagy Zaki Date: Wed, 8 Jun 2011 19:24:25 +0300 Subject: [PATCH] lavfi: avfilter_merge_formats: handle case where inputs are same This fixes a double-free crash if lists are the same due to the two merge_ref() calls at the end of the (useless) merging that happens. Signed-off-by: Anton Khirnov --- libavfilter/formats.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavfilter/formats.c b/libavfilter/formats.c index 9d048d7be2..206eff5587 100644 --- a/libavfilter/formats.c +++ b/libavfilter/formats.c @@ -45,6 +45,9 @@ AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b) AVFilterFormats *ret; unsigned i, j, k = 0, m_count; + if (a == b) + return a; + ret = av_mallocz(sizeof(*ret)); /* merge list of formats */