netdev - cassini driver: Use of uninitialized memory

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:	Thu, 25 Aug 2011 15:58:45 +0200
From:	Thomas Jarosch <thomas.jarosch@...ra2net.com>
To:	netdev@...r.kernel.org
Subject: cassini driver: Use of uninitialized memory

Hello,

the interrupt routine of the cassini driver
currently looks like this:

----------------------
static irqreturn_t cas_interruptN(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct cas *cp = netdev_priv(dev);
	unsigned long flags;
	int ring;
	u32 status = readl(cp->regs + REG_PLUS_INTRN_STATUS(ring));
...
----------------------

-> "ring" isn't initialized properly and gets used
in REG_PLUS_INTRN_STATUS. Some lines below there's this:

----------------------
	ring = (irq == cp->pci_irq_INTC) ? 2 : 3;
----------------------

Should that line be moved before the readl() call
or should "ring" be initialized with zero?

Credit for spotting this goes to cppcheck.

Cheers,
Thomas
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html