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authorFlorian Fainelli <f.fainelli@gmail.com>2015-07-12 01:02:10 (GMT)
committerDavid S. Miller <davem@davemloft.net>2015-07-12 06:25:16 (GMT)
commit8f5063e97f393d49611151d3cf7dcbeb41397f12 (patch)
tree09864acdea8b4c1ef6ed6a9d4f0b159f25d9ef28 /net/dsa
parent2ee94014d9bd3868b1c0d17405f96d63bec83f28 (diff)
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 <dan.carpenter@oracle.com> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/dsa.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 392e29a..52beeb8 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;
}
}

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