linux-kernel - Re: 2.6.24.2: 4KSTACKS + pcdrw + dm + mount -> stack overflow: ide-cd related? dm-related?

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Date:	Tue, 26 Feb 2008 12:37:17 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Jan Kara <jack@...e.cz>, Andrew Morton <akpm@...ux-foundation.org>,
	Nix <nix@...eri.org.uk>, Peter Osterlund <petero2@...ia.com>,
	linux-kernel@...r.kernel.org, dm-devel@...hat.com,
	Jan Kara <jack@....cz>
Subject: Re: 2.6.24.2: 4KSTACKS + pcdrw + dm + mount -> stack overflow:	ide-cd
 related? dm-related?

On Tue, 26 Feb 2008, Ingo Molnar wrote:

> > +	name = kmalloc(sizeof(char) * UDF_NAME_LEN, GFP_KERNEL);
> > +	fname = kmalloc(sizeof(char) * UDF_NAME_LEN, GFP_KERNEL);
> > +
> > +	if (!name || !fname) {
> > +		*err = -ENOMEM;
> > +		return NULL;
> > +	}
> > +
> >  	if (dentry) {
> >  		if (!dentry->d_name.len) {
> >  			*err = -EINVAL;
> this bit is missing i think:
> 	if (name)
> 		kfree(name);
> 	if (fname)
> 		kfree(fname);

Ergh, of course, stupid me, sorry, it should be freed on all exit paths. I 
am not sending updated patch, as Jan is probably working on complete 
removal of one of those fields ... ?

Thanks,

-- 
Jiri Kosina
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