Commit d3904b73 authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by David S. Miller

[NET]: Cleanup the error path in sk_attach_filter

The sk_filter_uncharge is called for error handling and
for releasing the former filter, but this will have to
be done in a bit different manner, so cleanup the error
path a bit.
Signed-off-by: default avatarPavel Emelyanov <xemul@openvz.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 309dd5fc
......@@ -398,7 +398,7 @@ int sk_chk_filter(struct sock_filter *filter, int flen)
*/
int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk)
{
struct sk_filter *fp;
struct sk_filter *fp, *old_fp;
unsigned int fsize = sizeof(struct sock_filter) * fprog->len;
int err;
......@@ -418,19 +418,18 @@ int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk)
fp->len = fprog->len;
err = sk_chk_filter(fp->insns, fp->len);
if (!err) {
struct sk_filter *old_fp;
rcu_read_lock_bh();
old_fp = rcu_dereference(sk->sk_filter);
rcu_assign_pointer(sk->sk_filter, fp);
rcu_read_unlock_bh();
fp = old_fp;
if (err) {
sk_filter_uncharge(sk, fp);
return err;
}
if (fp)
sk_filter_uncharge(sk, fp);
return err;
rcu_read_lock_bh();
old_fp = rcu_dereference(sk->sk_filter);
rcu_assign_pointer(sk->sk_filter, fp);
rcu_read_unlock_bh();
sk_filter_uncharge(sk, old_fp);
return 0;
}
int sk_detach_filter(struct sock *sk)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment