[PATCH 5.15 038/201] net: tun: split run_ebpf_filter() and pskb_trim() into different "if statement"

Greg Kroah-Hartman
2022-07-27T17:06:55Z

From: Dongli Zhang <dongli.zhang@oracle.com>

[ Upstream commit 45a15d89fbcd280571eba8e5ca309e14ba6afa8f ]

No functional change.

Just to split the if statement into different conditions to use
kfree_skb_reason() to trace the reason later.

Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Joe Jin <joe.jin@oracle.com>
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/tun.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index ea60453fe69a..f92d6a12831f 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1097,7 +1097,10 @@ static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
goto drop;

len = run_ebpf_filter(tun, skb, len);
- if (len == 0 || pskb_trim(skb, len))
+ if (len == 0)
+ goto drop;
+
+ if (pskb_trim(skb, len))
goto drop;

if (unlikely(skb_orphan_frags_rx(skb, GFP_ATOMIC)))
--
2.35.1