From 3258cc6507a2012d54889ce5f8efbde7e81d927d Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Sat, 28 Jul 2018 00:51:57 -0300
Subject: [PATCH] avcodec/bitstream_filters: check the input argument of
av_bsf_get_by_name() for NULL
Fixes crashes like "ffmpeg -h bsf" caused by passing NULL to strcmp()
Signed-off-by: James Almer <jamrial@gmail.com>
---
libavcodec/bitstream_filters.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c
index c21373621c7..34339215540 100644
--- a/libavcodec/bitstream_filters.c
+++ b/libavcodec/bitstream_filters.c
@@ -78,6 +78,9 @@ const AVBitStreamFilter *av_bsf_get_by_name(const char *name)
const AVBitStreamFilter *f = NULL;
void *i = 0;
+ if (!name)
+ return NULL;
+
while ((f = av_bsf_iterate(&i))) {
if (!strcmp(f->name, name))
return f;
--
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