[PATCH 2.6.32 39/42] ipv6/addrlabel: fix ip6addrlbl_get()
From: Willy Tarreau <w@1wt.eu>
Date: 2016-01-23 14:58:53
Also in:
lkml
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
2.6.32-longterm review patch. If anyone has any objections, please let me know.
------------------
From: Andrey Ryabinin <redacted>
commit e459dfeeb64008b2d23bdf600f03b3605dbb8152 upstream.
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 <redacted>
Reviewed-by: Cong Wang <redacted>
Acked-by: YOSHIFUJI Hideaki <redacted>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <redacted>
(cherry picked from commit 39b214ba1a357359f9c0be6ef8d21f2e5187567a)
Signed-off-by: Willy Tarreau <w@1wt.eu>
---
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 6ff73c4..5b1403d 100644
--- a/net/ipv6/addrlabel.c
+++ b/net/ipv6/addrlabel.c@@ -557,7 +557,7 @@ 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();
--
1.7.12.2.21.g234cd45.dirty