From: Micah Gruber <micah.gruber@gmail.com>
To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, jgarzik@pobox.com
Subject: [CORRECTION][PATCH] Fix a potential NULL pointer dereference in uli526x_interrupt() in drivers/net/tulip/uli526x.c
Date: Tue, 04 Sep 2007 16:14:06 +0800 [thread overview]
Message-ID: <46DD13CE.6010905@gmail.com> (raw)
This patch fixes a potential null dereference bug where we dereference dev before a null check. This patch simply moves the dereferencing after the null check.
Signed-off-by: Micah Gruber <micah.gruber@gmail.com>
---
--- a/drivers/net/tulip/uli526x.c
+++ b/drivers/net/tulip/uli526x.c
@@ -663,7 +663,7 @@
{
struct net_device *dev = dev_id;
struct uli526x_board_info *db = netdev_priv(dev);
- unsigned long ioaddr = dev->base_addr;
+ unsigned long ioaddr;
unsigned long flags;
if (!dev) {
@@ -671,6 +671,8 @@
return IRQ_NONE;
}
+ ioaddr = dev->base_addr;
+
spin_lock_irqsave(&db->lock, flags);
outl(0, ioaddr + DCR7);
next reply other threads:[~2007-09-04 8:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-04 8:14 Micah Gruber [this message]
2007-09-07 23:20 ` [CORRECTION][PATCH] Fix a potential NULL pointer dereference in uli526x_interrupt() in drivers/net/tulip/uli526x.c Jeff Garzik
2007-09-13 9:03 ` Andrew Morton
2007-09-13 9:03 ` Kyle McMartin
2007-09-13 14:16 ` Jeff Garzik
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