From: Andrey Ryabinin <aryabinin@virtuozzo.com>
To: "David S. Miller" <davem@davemloft.net>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
James Morris <jmorris@namei.org>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Patrick McHardy <kaber@trash.net>
Cc: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Andrey Ryabinin <aryabinin@virtuozzo.com>
Subject: [PATCH] ipv6/addrlabel: fix ip6addrlbl_get()
Date: Mon, 21 Dec 2015 12:54:45 +0300 [thread overview]
Message-ID: <1450691685-29413-1-git-send-email-aryabinin@virtuozzo.com> (raw)
ip6addrlbl_get() has never worked. If ip6addrlbl_hold() succeeded,
ip6addrlbl_get() will exit with '-ESRCH'. If ip6addrlbl_hold() failed,
ip6addrlbl_get() will use about to be free ip6addrlbl_entry pointer.
Fix this by inverting ip6addrlbl_hold() check.
Fixes: 2a8cc6c89039 ("[IPV6] ADDRCONF: Support RFC3484 configurable address selection policy table.")
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
---
net/ipv6/addrlabel.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv6/addrlabel.c b/net/ipv6/addrlabel.c
index 882124e..a8f6986 100644
--- a/net/ipv6/addrlabel.c
+++ b/net/ipv6/addrlabel.c
@@ -552,7 +552,7 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr *nlh)
rcu_read_lock();
p = __ipv6_addr_label(net, addr, ipv6_addr_type(addr), ifal->ifal_index);
- if (p && ip6addrlbl_hold(p))
+ if (p && !ip6addrlbl_hold(p))
p = NULL;
lseq = ip6addrlbl_table.seq;
rcu_read_unlock();
--
2.4.10
next reply other threads:[~2015-12-21 9:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-21 9:54 Andrey Ryabinin [this message]
2015-12-21 19:37 ` Cong Wang
2015-12-22 8:04 ` YOSHIFUJI Hideaki
2015-12-22 20:58 ` David Miller
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