[PATCH 5.9 175/252] bpf, sockmap: Use truesize with sk_rmem_schedule()

Greg Kroah-Hartman
2020-11-23T13:08:00Z

From: John Fastabend <john.fastabend@gmail.com>

[ Upstream commit 70796fb751f1d34cc650e640572a174faf009cd4 ]

We use skb->size with sk_rmem_scheduled() which is not correct. Instead
use truesize to align with socket and tcp stack usage of sk_rmem_schedule.

Suggested-by: Daniel Borkman <daniel@iogearbox.net>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/160556570616.73229.17003722112077507863.stgit@john-XPS-13-9370
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/core/skmsg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index eaf9c90389517..4ac112cc490c5 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -411,7 +411,7 @@ static int sk_psock_skb_ingress(struct sk_psock *psock, struct sk_buff *skb)
msg = kzalloc(sizeof(*msg), __GFP_NOWARN | GFP_ATOMIC);
if (unlikely(!msg))
return -EAGAIN;
- if (!sk_rmem_schedule(sk, skb, skb->len)) {
+ if (!sk_rmem_schedule(sk, skb, skb->truesize)) {
kfree(msg);
return -EAGAIN;
}
--
2.27.0