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X25: Dont let x25_bind use addresses containing characters

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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>
This commit is contained in:
andrew hendry 2010-02-14 02:00:45 +00:00 committed by David S. Miller
parent b18e7a0685
commit a9288525d2
1 changed files with 10 additions and 1 deletions
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11
net/x25/af_x25.c
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@ -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);