linux-kernel - [PATCH 08/14] aoe: disallow unsupported AoE minor addresses

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

Message-Id: <5d994b70af4d2bff609a80d5ed8004fdcbce7c78.1345743802.git.ecashin@coraid.com>
Date:	Fri, 17 Aug 2012 21:27:39 -0400
From:	Ed Cashin <ecashin@...aid.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, ecashin@...aid.com
Subject: [PATCH 08/14] aoe: disallow unsupported AoE minor addresses

A guard is inserted to prevent AoE minor addresses (slot addresses)
higher than 15 to be used, as they are not yet supported by the
driver.

There is a change coming that will allow the aoe driver to overcome
this limit by using system device minor numbers dynamically, but until
then, this guard prevents unexpected targets from being used by the
driver when AoE targets with high minor numbers are on the AoE
network.

Signed-off-by: Ed Cashin <ecashin@...aid.com>
---
 drivers/block/aoe/aoecmd.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index b5975c5..3eeef3a 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -1367,6 +1367,13 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
 			"Check shelf dip switches.\n");
 		return;
 	}
+	if (h->minor >= NPERSHELF) {
+		pr_err("aoe: e%ld.%d %s, %d\n",
+			aoemajor, h->minor,
+			"slot number larger than the maximum",
+			NPERSHELF-1);
+		return;
+	}
 
 	sysminor = SYSMINOR(aoemajor, h->minor);
 	if (sysminor * AOE_PARTITIONS + AOE_PARTITIONS > MINORMASK) {
-- 
1.7.2.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/