[FFmpeg-devel] [PATCH] lavfi/avf_showspectrum: check RDFT contet init.

[Nicolas George]

Fix a segfault with large window size.

Signed-off-by: Nicolas George <george at nsup.org>
---
 libavfilter/avf_showspectrum.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c
index 7bf3aab..764a000 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 allocate RDFT context. "
+                   "Maybe window too high.\n");
+            return AVERROR(EINVAL);
+        }
         s->rdft_bits = rdft_bits;
 
         /* RDFT buffers: x2 for each (display) channel buffer.
-- 
2.0.1