commit 2585e7e5e1fcf64fd2b2cac0bc1f1b609eabe96a
author Dan Carpenter <error27@gmail.com> Sat Jan 02 04:08:46 2010 +0000
committer David S. Miller <davem@davemloft.net> Sun Jan 03 22:06:15 2010 -0800
tree 7727b3e12099ae4570068b983f671c9683bf0656
parent 7ec4e7d3cfee9d7846dbd02ad442c40cb58512e8

rrunner: fix buffer overflow

tx_skbuff is define as:
        struct sk_buff          *tx_skbuff[TX_RING_ENTRIES];

EVT_RING_ENTRIES is 64 and TX_RING_ENTRIES is 32.

This function is in a error path so that's why it wasn't noticed.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/rrunner.c

diff --git a/drivers/net/rrunner.c b/drivers/net/rrunner.c
index 20a7174..1c25709 100644
--- a/drivers/net/rrunner.c
+++ b/drivers/net/rrunner.c
@@ -1293,7 +1293,7 @@
 
 	printk("Error code 0x%x\n", readl(&regs->Fail1));
 
-	index = (((readl(&regs->EvtPrd) >> 8) & 0xff ) - 1) % EVT_RING_ENTRIES;
+	index = (((readl(&regs->EvtPrd) >> 8) & 0xff) - 1) % TX_RING_ENTRIES;
 	cons = rrpriv->dirty_tx;
 	printk("TX ring index %i, TX consumer %i\n",
 	       index, cons);