tokenring: Read buffer overflow

io[i] is read before the bounds check on i, order should be reversed

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/tokenring/ibmtr.c b/drivers/net/tokenring/ibmtr.c
index 9d89611..08a6c41 100644 (file)
--- a/drivers/net/tokenring/ibmtr.c
+++ b/drivers/net/tokenring/ibmtr.c
@@ -1912,7 +1912,7 @@ static int __init ibmtr_init(void)
 
        find_turbo_adapters(io);
 
-       for (i = 0; io[i] && (i < IBMTR_MAX_ADAPTERS); i++) {
+       for (i = 0; i < IBMTR_MAX_ADAPTERS && io[i]; i++) {
                struct net_device *dev;
                irq[i] = 0;
                mem[i] = 0;