netdev - [PATCH stable 4.4 v2 11/11] ipv4: frags: precedence bug in ip

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Message-ID: <1548384524-174152-12-git-send-email-maowenan@huawei.com>
Date:   Fri, 25 Jan 2019 10:48:44 +0800
From:   Mao Wenan <maowenan@...wei.com>
To:     <gregkh@...ux-foundation.org>, <stable@...r.kernel.org>,
        <edumazet@...gle.com>, <netdev@...r.kernel.org>,
        <davem@...emloft.net>, <maowenan@...wei.com>,
        <eric.dumazet@...il.com>
Subject: [PATCH stable 4.4 v2 11/11] ipv4: frags: precedence bug in ip_expire()

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit 70837ffe3085c9a91488b52ca13ac84424da1042 ]

We accidentally removed the parentheses here, but they are required
because '!' has higher precedence than '&'.

Fixes: fa0f527358bd ("ip: use rb trees for IP frag queue.")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Mao Wenan <maowenan@...wei.com>
---
 net/ipv4/ip_fragment.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 0e75881..eb8955c 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -257,7 +257,7 @@ static void ip_expire(unsigned long arg)
 	IP_INC_STATS_BH(net, IPSTATS_MIB_REASMFAILS);
 	IP_INC_STATS_BH(net, IPSTATS_MIB_REASMTIMEOUT);
 
-	if (!qp->q.flags & INET_FRAG_FIRST_IN)
+	if (!(qp->q.flags & INET_FRAG_FIRST_IN))
 		goto out;
 
 	/* sk_buff::dev and sk_buff::rbnode are unionized. So we
-- 
1.8.3.1