linux-kernel - [patch] Fix bug #13853: dereference pointer 'dev' before null check

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 02 Mar 2011 21:20:21 -0500
From:	Jinqiu <crindy646@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: [patch] Fix bug #13853: dereference pointer 'dev' before null check

This patch fixes bug #13853 .This still exists in latest version.
'dev' is dereferenced before testing for NULL.

Signed-off-by: Jinqiu Yang<crindy646@...il.com>
--- a/drivers/net/ariadne.c
+++ b/drivers/net/ariadne.c
@@ -420,7 +420,7 @@ static inline void ariadne_reset(struct
static irqreturn_t ariadne_interrupt(int irq, void *data)
{
	struct net_device *dev = (struct net_device *) data;
- 	volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
+ 	volatile struct Am79C960 *lance;
	struct ariadne_private *priv;
	int csr0, boguscnt;
	int handled = 0;
@@ -429,6 +429, 7 @@ static irqreturn_t ariadne_interrupt(int
		printk(KERN_WARNING  "ariadne_interrupt(): irq for unknown device.\n");
		return IRQ_NONE;
	}
+ 	lance = (struct Am79C960 *)dev->base_addr;

	lance->RAP = CSR0; 					/* PCnet-ISA Controller Status */




--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/