Addresses should be all digits. Stops x25_bind using addresses
containing characters.
Signed-off-by: Andrew Hendry <[email protected]>
---
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 6c7104e..8cc7583 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -55,6 +55,7 @@
#include <linux/notifier.h>
#include <linux/init.h>
#include <linux/compat.h>
+#include <linux/ctype.h>
#include <net/x25.h>
#include <net/compat.h>
@@ -648,7 +649,7 @@ static int x25_bind(struct socket *sock, struct
sockaddr *uaddr, int addr_len)
{
struct sock *sk = sock->sk;
struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
- int rc = 0;
+ int len, i, rc = 0;
lock_kernel();
if (!sock_flag(sk, SOCK_ZAPPED) ||
@@ -658,6 +659,14 @@ static int x25_bind(struct socket *sock, struct
sockaddr *uaddr, int addr_len)
goto out;
}
+ len = strlen(addr->sx25_addr.x25_addr);
+ for (i = 0; i < len; i++) {
+ if (!isdigit(addr->sx25_addr.x25_addr[i])) {
+ rc = -EINVAL;
+ goto out;
+ }
+ }
+
x25_sk(sk)->source_addr = addr->sx25_addr;
x25_insert_socket(sk);
sock_reset_flag(sk, SOCK_ZAPPED);
--
1.6.3.3