From 4b2a2969f3e06433a06f835d2af2bae4499314ae Mon Sep 17 00:00:00 2001
From: Timo Rothenpieler <timo@rothenpieler.org>
Date: Sun, 11 Jun 2017 15:08:43 +0200
Subject: [PATCH] avformat/librtmp: check return value of setsockopt

Fixes CID 1396837
---
 libavformat/librtmp.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavformat/librtmp.c b/libavformat/librtmp.c
index 146df660ac..f3cfa9a8e2 100644
--- a/libavformat/librtmp.c
+++ b/libavformat/librtmp.c
@@ -239,7 +239,10 @@ static int rtmp_open(URLContext *s, const char *uri, int flags)
 #if CONFIG_NETWORK
     if (ctx->buffer_size >= 0 && (flags & AVIO_FLAG_WRITE)) {
         int tmp = ctx->buffer_size;
-        setsockopt(r->m_sb.sb_socket, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp));
+        if (setsockopt(r->m_sb.sb_socket, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp))) {
+            rc = AVERROR_EXTERNAL;
+            goto fail;
+        }
     }
 #endif