linux-kernel - Re: mpol_to

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Message-ID: <alpine.DEB.2.00.1210151748010.31712@chino.kir.corp.google.com>
Date:	Mon, 15 Oct 2012 17:48:33 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	bhutchings@...arflare.com, linux-mm@...ck.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: mpol_to_str revisited.

On Mon, 8 Oct 2012, Dave Jones wrote:

>  > > diff -durpN '--exclude-from=/home/davej/.exclude' src/git-trees/kernel/linux/fs/proc/task_mmu.c linux-dj/fs/proc/task_mmu.c
>  > > --- src/git-trees/kernel/linux/fs/proc/task_mmu.c	2012-05-31 22:32:46.778150675 -0400
>  > > +++ linux-dj/fs/proc/task_mmu.c	2012-10-04 19:31:41.269988984 -0400
>  > > @@ -1162,6 +1162,7 @@ static int show_numa_map(struct seq_file
>  > >  	struct mm_walk walk = {};
>  > >  	struct mempolicy *pol;
>  > >  	int n;
>  > > +	int ret;
>  > >  	char buffer[50];
>  > >  
>  > >  	if (!mm)
>  > > @@ -1178,7 +1179,11 @@ static int show_numa_map(struct seq_file
>  > >  	walk.mm = mm;
>  > >  
>  > >  	pol = get_vma_policy(proc_priv->task, vma, vma->vm_start);
>  > > -	mpol_to_str(buffer, sizeof(buffer), pol, 0);
>  > > +	memset(buffer, 0, sizeof(buffer));
>  > > +	ret = mpol_to_str(buffer, sizeof(buffer), pol, 0);
>  > > +	if (ret < 0)
>  > > +		return 0;
>  > 
>  > We should need the mpol_cond_put(pol) here before returning.
> 
> good catch. I'll respin the patch later with this changed.
> 

Did you get a chance to fix this issue?
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