From: Rémi Denis-Courmont <rdenis@simphalempin.com>
Date: Fri, 15 Feb 2008 10:35:45 +0000 (-0800)
Subject: [NET]: Make sure sockets implement splice_read
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=997b37da1515c1620692521786a74af271664eb7;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[NET]: Make sure sockets implement splice_read

Fixes a segmentation fault when trying to splice from a non-TCP socket.

Signed-off-by: Rémi Denis-Courmont <rdenis@simphalempin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/socket.c b/net/socket.c
index 7651de00850..b6d35cd72a5 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -701,6 +701,9 @@ static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
 {
 	struct socket *sock = file->private_data;
 
+	if (unlikely(!sock->ops->splice_read))
+		return -EINVAL;
+
 	return sock->ops->splice_read(sock, ppos, pipe, len, flags);
 }