linux-kernel - [PATCH v2] bonding: correctly handle out of range parameters for lp

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Message-Id: <1394142791-11142-1-git-send-email-sasha.levin@oracle.com>
Date:	Thu,  6 Mar 2014 16:53:11 -0500
From:	Sasha Levin <sasha.levin@...cle.com>
To:	fubar@...ibm.com, vfalico@...hat.com, andy@...yhouse.net
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, nikolay@...hat.com,
	Sasha Levin <sasha.levin@...cle.com>
Subject: [PATCH v2] bonding: correctly handle out of range parameters for lp_interval

We didn't correctly check cases where the value for lp_interval is not
within the legal range due to a missing table terminator.

This would let userspace trigger a kernel panic by specifying a value out
of range:

	echo -1 > /sys/devices/virtual/net/bond0/bonding/lp_interval

Introduced by commit 4325b374f84 ("bonding: convert lp_interval to use
the new option API").

Acked-by: Nikolay Aleksandrov <nikolay@...hat.com>
Signed-off-by: Sasha Levin <sasha.levin@...cle.com>
---
 drivers/net/bonding/bond_options.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
index 23f3655..4d35cdc 100644
--- a/drivers/net/bonding/bond_options.c
+++ b/drivers/net/bonding/bond_options.c
@@ -124,6 +124,7 @@ static struct bond_opt_value bond_resend_igmp_tbl[] = {
 static struct bond_opt_value bond_lp_interval_tbl[] = {
 	{ "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 	{ "maxval",  INT_MAX, BOND_VALFLAG_MAX},
+	{ NULL,      -1,      0},	
 };
 
 static struct bond_option bond_opts[] = {
-- 
1.7.2.5

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