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

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Date:	Mon, 23 Oct 2006 11:32:08 -0700
From:	"Dan Carpenter" <error27@...il.com>
To:	"Neil Horman" <nhorman@...driver.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 10/23/06, Neil Horman <nhorman@...driver.com> wrote:
> 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));
> +
>
>

Ah.  Great.  Sorry, didn't notice that you'd taken care of that
already.  Looks good.

regards,
dan carpenter

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