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authorandrew hendry <andrew.hendry@gmail.com>2010-02-14 02:00:45 +0000
committerDavid S. Miller <davem@davemloft.net>2010-02-15 21:49:52 -0800
commita9288525d2aed806c1b8a785c226d4a9e6371650 (patch)
tree5de6722a6dfc60e603caa9631609d379b6547a1e /net
parentb18e7a06857833d2c7c8c8457e5a3a7c3327f643 (diff)
X25: Dont let x25_bind use addresses containing characters
Addresses should be all digits. Stops x25_bind using addresses containing characters. Signed-off-by: Andrew Hendry <andrew.hendry@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/x25/af_x25.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 6c7104edec60..9796f3ed1edb 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);