From 638eec2ac34b7f65a8e84203ea4292440bc8fe50 Mon Sep 17 00:00:00 2001
From: Nicolas George <george@nsup.org>
Date: Sun, 3 Aug 2014 20:39:59 +0200
Subject: [PATCH] lavfi/avf_showspectrum: check RDFT context init.
Fix a segfault with large window size.
---
libavfilter/avf_showspectrum.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c
index 9130f6f4abd..bd4d818d6bb 100644
--- a/libavfilter/avf_showspectrum.c
+++ b/libavfilter/avf_showspectrum.c
@@ -177,6 +177,11 @@ static int config_output(AVFilterLink *outlink)
av_rdft_end(s->rdft);
s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
+ if (!s->rdft) {
+ av_log(ctx, AV_LOG_ERROR, "Unable to create RDFT context. "
+ "The window size might be too high.\n");
+ return AVERROR(EINVAL);
+ }
s->rdft_bits = rdft_bits;
/* RDFT buffers: x2 for each (display) channel buffer.
--
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