netdev - [PATCH] [IPv4] Add strict check for replying net unreachable message

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Fri, 7 Dec 2007 13:24:18 +0900
From:	Mitsuru Chinen <mitch@...ux.vnet.ibm.com>
To:	netdev@...r.kernel.org
Cc:	David Miller <davem@...emloft.net>,
	Rami Rosen <roszenrami@...il.com>,
	Jarek Poplawski <jarkao2@...il.com>
Subject: [PATCH] [IPv4] Add strict check for replying net unreachable
 message

The patch `Reply net unreachable ICMP message' had a bug.
A route whose type is blockhole or prohibit type is treated as
unreachable type. The case where err is set to ENETUNREACH should
be that no route is found in the routing table only.

Signed-off-by: Mitsuru Chinen <mitch@...ux.vnet.ibm.com>
---
 net/ipv4/route.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 8a79f74..d2bc614 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1882,7 +1882,8 @@ no_route:
 	RT_CACHE_STAT_INC(in_no_route);
 	spec_dst = inet_select_addr(dev, 0, RT_SCOPE_UNIVERSE);
 	res.type = RTN_UNREACHABLE;
-	err = -ENETUNREACH;
+	if (err == -ESRCH)
+		err = -ENETUNREACH;
 	goto local_input;
 
 	/*
-- 
1.5.3.4

--
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