From 8f5063e97f393d49611151d3cf7dcbeb41397f12 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Sat, 11 Jul 2015 18:02:10 -0700 Subject: [PATCH] net: dsa: Test array index before use port_index is used an index into an array, and this information comes from Device Tree, make sure that port_index is not equal to the array size before using it. Move the check against port_index earlier in the loop. Fixes: 5e95329b701c: ("dsa: add device tree bindings to register DSA switches") Reported-by: Dan Carpenter Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- net/dsa/dsa.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c index 392e29a0227d..52beeb8829dc 100644 --- a/net/dsa/dsa.c +++ b/net/dsa/dsa.c @@ -642,6 +642,8 @@ static int dsa_of_probe(struct device *dev) continue; port_index = be32_to_cpup(port_reg); + if (port_index >= DSA_MAX_PORTS) + break; port_name = of_get_property(port, "label", NULL); if (!port_name) @@ -666,8 +668,6 @@ static int dsa_of_probe(struct device *dev) goto out_free_chip; } - if (port_index == DSA_MAX_PORTS) - break; } }