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Fix potential vulnerability in a cloned function #223

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Fix potential vulnerability in a cloned function #223

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11 changes: 1 addition & 10 deletions drivers/vhost/net.c
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Original file line number Diff line number Diff line change
Expand Up @@ -838,10 +838,6 @@ static int vhost_net_release(struct inode *inode, struct file *f)

static struct socket *get_raw_socket(int fd)
{
struct {
struct sockaddr_ll sa;
char buf[MAX_ADDR_LEN];
} uaddr;
int uaddr_len = sizeof uaddr, r;
struct socket *sock = sockfd_lookup(fd, &r);

Expand All @@ -854,12 +850,7 @@ static struct socket *get_raw_socket(int fd)
goto err;
}

r = sock->ops->getname(sock, (struct sockaddr *)&uaddr.sa,
&uaddr_len, 0);
if (r)
goto err;

if (uaddr.sa.sll_family != AF_PACKET) {
if (sock->sk->sk_family != AF_PACKET) {
r = -EPFNOSUPPORT;
goto err;
}
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