netdev - [PATCH] Make sure sockets implement splice

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Message-Id: <200802141853.35016.rdenis@simphalempin.com>
Date:	Thu, 14 Feb 2008 18:53:34 +0200
From:	Rémi Denis-Courmont <rdenis@...phalempin.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: [PATCH] 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@...phalempin.com>
---
 net/socket.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/net/socket.c b/net/socket.c
index 7651de0..b6d35cd 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);
 }
 
-- 
1.5.4.1

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