netdev - [PATCH] ipv6: Remove route peer binding assertions.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Date:	Thu, 27 Jan 2011 14:56:14 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	netdev@...r.kernel.org
Subject: [PATCH] ipv6: Remove route peer binding assertions.

They are bogus.  The basic idea is that I wanted to make sure
that prefixed routes never bind to peers.

The test I used was whether RTF_CACHE was set.

But first of all, the RTF_CACHE flag is set at different spots
depending upon which ip6_rt_copy() caller you're talking about.

I've validated all of the code paths, and even in the future
where we bind peers more aggressively (for route metric COW'ing)
we never bind to prefix'd routes, only fully specified ones.
This even applies when addrconf or icmp6 routes are allocated.

Signed-off-by: David S. Miller <davem@...emloft.net>
---

I ran into, and dissected this, while working on the inetpeer
metrics changes.  Committed to net-2.6

 net/ipv6/route.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 1534508..28a85fc 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -194,7 +194,6 @@ static void ip6_dst_destroy(struct dst_entry *dst)
 		in6_dev_put(idev);
 	}
 	if (peer) {
-		BUG_ON(!(rt->rt6i_flags & RTF_CACHE));
 		rt->rt6i_peer = NULL;
 		inet_putpeer(peer);
 	}
@@ -204,9 +203,6 @@ void rt6_bind_peer(struct rt6_info *rt, int create)
 {
 	struct inet_peer *peer;

-	if (WARN_ON(!(rt->rt6i_flags & RTF_CACHE)))
-		return;
-
 	peer = inet_getpeer_v6(&rt->rt6i_dst.addr, create);
 	if (peer && cmpxchg(&rt->rt6i_peer, NULL, peer) != NULL)
 		inet_putpeer(peer);
-- 
1.7.3.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html