[PATCH] bonding: correctly handle out of range parameters for lp_interval

From: Sasha Levin
Date: Thu Mar 06 2014 - 13:04:16 EST


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 "bonding: add infrastructure for an option API".

Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
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

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