From 579795b2049bc8b0f291b302e7ab24f9561eaf24 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 23 Jan 2015 15:03:40 +0100
Subject: [PATCH] avfilter/af_channelmap: Check for missing argument in
get_channel_idx()
Fixes null pointer dereference
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
libavfilter/af_channelmap.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavfilter/af_channelmap.c b/libavfilter/af_channelmap.c
index c3454c5b698..2a43c12af20 100644
--- a/libavfilter/af_channelmap.c
+++ b/libavfilter/af_channelmap.c
@@ -93,6 +93,8 @@ static int get_channel_idx(char **map, int *ch, char delim, int max_ch)
int n = 0;
if (!next && delim == '-')
return AVERROR(EINVAL);
+ if (!*map)
+ return AVERROR(EINVAL);
len = strlen(*map);
sscanf(*map, "%d%n", ch, &n);
if (n != len)
--
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