From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Mon, 8 Jul 2019 19:53:18 -0700
Subject: net/tls: fix socket wmem accounting on fallback with netem
Patch-mainline: v5.3-rc1
Git-commit: 5c4b4608fe100838c62591877101128467e56c00
References: bsc#1109837

netem runs skb_orphan_partial() which "disconnects" the skb
from normal TCP write memory accounting.  We should not adjust
sk->sk_wmem_alloc on the fallback path for such skbs.

Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 net/tls/tls_device_fallback.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/net/tls/tls_device_fallback.c
+++ b/net/tls/tls_device_fallback.c
@@ -208,6 +208,10 @@ static void complete_skb(struct sk_buff
 
 	update_chksum(nskb, headln);
 
+	/* sock_efree means skb must gone through skb_orphan_partial() */
+	if (nskb->destructor == sock_efree)
+		return;
+
 	delta = nskb->truesize - skb->truesize;
 	if (likely(delta < 0))
 		WARN_ON_ONCE(atomic_sub_and_test(-delta, &sk->sk_wmem_alloc));