linux-kernel - Re: [KJ] [PATCH] Correct misc_register return code handling in several drivers

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Message-ID: <20061023181329.GC23714@hmsreliant.homelinux.net>
Date:	Mon, 23 Oct 2006 14:13:29 -0400
From:	Neil Horman <nhorman@...driver.com>
To:	Dan Carpenter <error27@...il.com>
Cc:	kernel-janitors@...ts.osdl.org, akpm@...l.org, maxk@...lcomm.com,
	benh@...nel.crashing.org, linux-kernel@...r.kernel.org,
	kjhall@...ibm.com
Subject: Re: [KJ] [PATCH] Correct misc_register return code handling in several drivers

On Mon, Oct 23, 2006 at 11:01:36AM -0700, Dan Carpenter wrote:
> On 10/23/06, Neil Horman <nhorman@...driver.com> wrote:
> >+out3:
> >+       for_each_online_node(node) {
> >+               if(timers[node] != NULL)
> >+                       kfree(timers[node]);
> >+       }
> 
> Tharindu is going to be unhappy out if he sees that.  There is a
> possibility that timers[node] is uninitialized.  if node[0] is null
> then node[1] is uninitialized and it's going to cause a crash.
> 
> regards,
> dan carpenter


Theres a memset to ensure that all the timer pointers are initalized to NULL in
the patch:

@@ -709,16 +710,18 @@ static int __init mmtimer_init(void)
        if (timers == NULL) {
                printk(KERN_ERR "%s: failed to allocate memory for device\n",
                                MMTIMER_NAME);
-               return -1;
+               goto out2;
        }

+       memset(timers,0,(sizeof(mmtimer_t *)*maxn));
+


-- 
/***************************************************
 *Neil Horman
 *Software Engineer
 *gpg keyid: 1024D / 0x92A74FA1 - http://pgp.mit.edu
 ***************************************************/
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