diff mbox series

[05/24] net: switch sock_setbindtodevice to sockptr_t

Message ID 20200720124737.118617-6-hch@lst.de (mailing list archive)
State Awaiting Upstream
Headers show
Series [01/24] bpfilter: reject kernel addresses | expand

Commit Message

Christoph Hellwig July 20, 2020, 12:47 p.m. UTC 
Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 net/core/sock.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/net/core/sock.c b/net/core/sock.c
index 91224709869389..bd20fc5cce0850 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -608,8 +608,7 @@  int sock_bindtoindex(struct sock *sk, int ifindex, bool lock_sk)
 }
 EXPORT_SYMBOL(sock_bindtoindex);
 
-static int sock_setbindtodevice(struct sock *sk, char __user *optval,
-				int optlen)
+static int sock_setbindtodevice(struct sock *sk, sockptr_t optval, int optlen)
 {
 	int ret = -ENOPROTOOPT;
 #ifdef CONFIG_NETDEVICES
@@ -631,7 +630,7 @@  static int sock_setbindtodevice(struct sock *sk, char __user *optval,
 	memset(devname, 0, sizeof(devname));
 
 	ret = -EFAULT;
-	if (copy_from_user(devname, optval, optlen))
+	if (copy_from_sockptr(devname, optval, optlen))
 		goto out;
 
 	index = 0;
@@ -839,7 +838,7 @@  int sock_setsockopt(struct socket *sock, int level, int optname,
 	 */
 
 	if (optname == SO_BINDTODEVICE)
-		return sock_setbindtodevice(sk, optval, optlen);
+		return sock_setbindtodevice(sk, USER_SOCKPTR(optval), optlen);
 
 	if (optlen < sizeof(int))
 		return -EINVAL;