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af_unix: Rename unlinked_skb in manage_oob().

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When OOB skb has been already consumed, manage_oob() returns the next
skb if exists.  In such a case, we need to fall back to the else branch
below.

Then, we need to keep two skbs and free them later with consume_skb()
and kfree_skb().

Let's rename unlinked_skb accordingly.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20240905193240.17565-3-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kuniyuki Iwashima 2024-09-05 12:32:38 -07:00 committed by Jakub Kicinski
parent 579770dd89
commit beb2c5f19b
1 changed files with 6 additions and 6 deletions
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12
net/unix/af_unix.c
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@ -2654,7 +2654,7 @@ static int unix_stream_recv_urg(struct unix_stream_read_state *state)
static struct sk_buff *manage_oob(struct sk_buff *skb, struct sock *sk,
int flags, int copied)
{
struct sk_buff *unlinked_skb = NULL;
struct sk_buff *read_skb = NULL, *unread_skb = NULL;
struct unix_sock *u = unix_sk(sk);
if (!unix_skb_len(skb)) {
@ -2665,14 +2665,14 @@ static struct sk_buff *manage_oob(struct sk_buff *skb, struct sock *sk,
} else if (flags & MSG_PEEK) {
skb = skb_peek_next(skb, &sk->sk_receive_queue);
} else {
unlinked_skb = skb;
read_skb = skb;
skb = skb_peek_next(skb, &sk->sk_receive_queue);
__skb_unlink(unlinked_skb, &sk->sk_receive_queue);
__skb_unlink(read_skb, &sk->sk_receive_queue);
}
spin_unlock(&sk->sk_receive_queue.lock);
consume_skb(unlinked_skb);
consume_skb(read_skb);
return skb;
}
@ -2688,7 +2688,7 @@ static struct sk_buff *manage_oob(struct sk_buff *skb, struct sock *sk,
if (!sock_flag(sk, SOCK_URGINLINE)) {
__skb_unlink(skb, &sk->sk_receive_queue);
unlinked_skb = skb;
unread_skb = skb;
skb = skb_peek(&sk->sk_receive_queue);
}
} else if (!sock_flag(sk, SOCK_URGINLINE)) {
@ -2698,7 +2698,7 @@ static struct sk_buff *manage_oob(struct sk_buff *skb, struct sock *sk,
unlock:
spin_unlock(&sk->sk_receive_queue.lock);
kfree_skb(unlinked_skb);
kfree_skb(unread_skb);
return skb;
}