From: Cong Wang <cong.wang@xxxxxxxxxxxxx>
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: 799aa7f98d53 ("skmsg: Avoid lock_sock() in sk_psock_backlog()")
Cc: John Fastabend <john.fastabend@xxxxxxxxx>
Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Cc: Jakub Sitnicki <jakub@xxxxxxxxxxxxxx>
Cc: Lorenz Bauer <lmb@xxxxxxxxxxxxxx>
Signed-off-by: Cong Wang <cong.wang@xxxxxxxxxxxxx>
---
net/core/skmsg.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index 4334720e2a04..5464477e2d3d 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -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:
--
2.25.1
