linux-kernel - Re: [Bug #15196] kmem_cache_create: duplicate cache ccid2

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Date:	Sun, 7 Feb 2010 12:42:03 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Heinz Diehl <htd@...cy-poultry.org>
Cc:	Xiaotian Feng <xtfeng@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	nhorman@...driver.com, davem@...emloft.net
Subject: Re: [Bug #15196] kmem_cache_create: duplicate cache ccid2_h

On Sunday 07 February 2010, Heinz Diehl wrote:
> On 01.02.2010, Heinz Diehl wrote: 
> 
> [....]
> 
> Quoting myself here...
> 
> > The patch was completely malformed, don't know what happened on the way,
> > but I applied it by hand. Yes, it fixes the problem for me.
> 
> Xiaotiangs patch quoted in the thread listed here (coming via kernel.org's
> bugtracker)
> 
>  http://patchwork.kernel.org/patch/76023/
>  
> is missing some lines, and the patch attached at the end of the
> thread is incomplete and malformed, as reported earlier. I guess this is
> how it should have looked like (please correct me if I'm wrong):

Thanks, I updated the bug entry with a link to your patch below.

> --- /a/ccid.c	2010-02-06 23:17:12.000000000 +0100
> +++ /b/ccid.c	2010-02-07 09:50:40.000000000 +0100
> @@ -77,13 +77,13 @@
>  	return err;
>  }
>  
> -static struct kmem_cache *ccid_kmem_cache_create(int obj_size, char *slab_name_fmt, const char *fmt,...)
> +static struct kmem_cache *ccid_kmem_cache_create(int obj_size, char *slab_name_fmt, int length, const char *fmt,...)
>  {
>  	struct kmem_cache *slab;
>  	va_list args;
>  
>  	va_start(args, fmt);
> -	vsnprintf(slab_name_fmt, sizeof(slab_name_fmt), fmt, args);
> +	vsnprintf(slab_name_fmt, length, fmt, args);
>  	va_end(args);
>  
>  	slab = kmem_cache_create(slab_name_fmt, sizeof(struct ccid) + obj_size, 0,
> @@ -104,6 +104,7 @@
>  	ccid_ops->ccid_hc_rx_slab =
>  			ccid_kmem_cache_create(ccid_ops->ccid_hc_rx_obj_size,
>  					       ccid_ops->ccid_hc_rx_slab_name,
> +					       sizeof(ccid_ops->ccid_hc_rx_slab_name),
>  					       "ccid%u_hc_rx_sock",
>  					       ccid_ops->ccid_id);
>  	if (ccid_ops->ccid_hc_rx_slab == NULL)
> @@ -112,6 +113,7 @@
>  	ccid_ops->ccid_hc_tx_slab =
>  			ccid_kmem_cache_create(ccid_ops->ccid_hc_tx_obj_size,
>  					       ccid_ops->ccid_hc_tx_slab_name,
> +					       sizeof(ccid_ops->ccid_hc_tx_slab_name),
>  					       "ccid%u_hc_tx_sock",
>  					       ccid_ops->ccid_id);
>  	if (ccid_ops->ccid_hc_tx_slab == NULL)
> 

Rafael
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