Messages in this thread | | | Date | Mon, 6 Mar 2006 02:28:23 -0500 | From | Dave Jones <> | Subject | Re: 9pfs double kfree |
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On Mon, Mar 06, 2006 at 07:23:46AM +0000, Al Viro wrote: > On Sun, Mar 05, 2006 at 11:07:11PM -0800, David S. Miller wrote: > > From: Dave Jones <davej@redhat.com> > > Date: Mon, 6 Mar 2006 02:04:58 -0500 > > > > > (I wish we had a kfree variant that NULL'd the target when it was free'd) > > > > Excellent idea. > > ITYM "poison the pointer variable". Otherwise that sort of crap will go > unnoticed.
yeah, even better idea. Just like slab debug, but without the overhead of poisoning the whole object.
I wonder if we could get away with something as simple as..
#define kfree(foo) \ __kfree(foo); \ foo = KFREE_POISON;
?
Dave
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