Messages in this thread | | | Date | Mon, 6 Mar 2006 12:56:03 +0530 | From | "Balbir Singh" <> | Subject | Re: 9pfs double kfree |
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On 3/6/06, David S. Miller <davem@davemloft.net> 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. > -
Slab debugging should catch double frees, but it will not attract your attention till you see your dmesg log. kfree() will ignore NULL pointer, from the comments in kfree
/** * kfree - free previously allocated memory * @objp: pointer returned by kmalloc. * * If @objp is NULL, no operation is performed. <snip>
May we could have such a variant under CONFIG_DEBUG_SLAB if we needed and also change the variant kfree to BUG_ON() a NULL pointer.
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