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skmsg: Fix a memory leak in sk_psock_verdict_apply() 

If the dest psock does not set SK_PSOCK_TX_ENABLED,
the skb can't be queued anywhere so must be dropped.

This one is found during code review.

Fixes: 799aa7f98d ("skmsg: Avoid lock_sock() in sk_psock_backlog()")
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/20210615021342.7416-6-xiyou.wangcong@gmail.com
This commit is contained in:
Cong Wang 2021-06-14 19:13:39 -07:00 committed by Daniel Borkmann
parent 30b9c54a70
commit 0cf6672b23
1 changed files with 5 additions and 0 deletions
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5
net/core/skmsg.c
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@ -924,8 +924,13 @@ static void sk_psock_verdict_apply(struct sk_psock *psock,
if (sk_psock_test_state(psock, SK_PSOCK_TX_ENABLED)) {
skb_queue_tail(&psock->ingress_skb, skb);
schedule_work(&psock->work);
err = 0;
}
spin_unlock_bh(&psock->ingress_lock);
if (err < 0) {
skb_bpf_redirect_clear(skb);
goto out_free;
}
}
break;
case __SK_REDIRECT: