From: David Miller <davem@davemloft•net>
To: wg@grandegger•com
Cc: hjk@linutronix•de, netdev@vger•kernel.org,
socketcan-core@lists•berlios.de
Subject: Re: [PATCH] can: Fix possible NULL pointer dereference in ems_usb.c
Date: Tue, 20 Apr 2010 18:05:01 -0700 (PDT) [thread overview]
Message-ID: <20100420.180501.08643239.davem@davemloft.net> (raw)
In-Reply-To: <4BCE04D9.2030601@grandegger.com>
From: Wolfgang Grandegger <wg@grandegger•com>
Date: Tue, 20 Apr 2010 21:47:37 +0200
> Hans J. Koch wrote:
>> In ems_usb_probe(), a pointer is dereferenced after making sure it is NULL...
>>
>> This patch replaces dev_err() with printk() to avoid this.
>>
>> Signed-off-by: "Hans J. Koch" <hjk@linutronix•de>
>> ---
>> drivers/net/can/usb/ems_usb.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> Index: linux-2.6.34-rc/drivers/net/can/usb/ems_usb.c
>> ===================================================================
>> --- linux-2.6.34-rc.orig/drivers/net/can/usb/ems_usb.c 2010-04-20 15:32:25.000000000 +0200
>> +++ linux-2.6.34-rc/drivers/net/can/usb/ems_usb.c 2010-04-20 15:33:20.000000000 +0200
>> @@ -1006,7 +1006,7 @@
>>
>> netdev = alloc_candev(sizeof(struct ems_usb), MAX_TX_URBS);
>> if (!netdev) {
>> - dev_err(netdev->dev.parent, "Couldn't alloc candev\n");
>> + printk(KERN_ERR "ems_usb: Couldn't alloc candev\n");
>> return -ENOMEM;
>> }
>
> I think "dev_err(&intf->dev, ...)" should be used before
> SET_NETDEV_DEV(netdev, &intf->dev) is called. I see two "dev_err()"
> calls which need to be fixed.
Agreed.
next prev parent reply other threads:[~2010-04-21 1:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-20 13:55 [PATCH] can: Fix possible NULL pointer dereference in ems_usb.c Hans J. Koch
[not found] ` <20100420135538.GA1994-hikPBsva6T+Nj9Bq2fkWzw@public.gmane.org>
2010-04-20 19:47 ` Wolfgang Grandegger
2010-04-21 1:05 ` David Miller [this message]
[not found] ` <20100420.180501.08643239.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2010-04-21 10:18 ` Hans J. Koch
[not found] ` <20100421101805.GA1995-hikPBsva6T+Nj9Bq2fkWzw@public.gmane.org>
2010-04-21 10:27 ` Wolfgang Grandegger
2010-04-21 23:15 ` David Miller
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