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 <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>
---
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;
}
}
--
2.1.4
--
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