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Re: kern/40651: kmem_alloc() returns misaligned pointers
The following reply was made to PR kern/40651; it has been noted by GNATS.
From: enami tsugutomo <enami%sm.sony.co.jp@localhost>
Cc: kern-bug-people%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost,
Subject: Re: kern/40651: kmem_alloc() returns misaligned pointers
Date: 19 Feb 2009 12:07:15 +0900
Martin Husemann <martin%duskware.de@localhost> writes:
> On Tue, Feb 17, 2009 at 10:56:58PM +0000, Andrew Doran wrote:
> > It should be:
> > size += REDZONE_SIZE;
> > kmem_poison_fill(p, size);
> Unfortunately that does not fix it - still the same:
The added region already passed the poison check just above so it
shouldn't fix it.
> panic: kmem_poison_check: 0xf41cb600: 0x00 != 0x73
I'd like to see the contents of around this address. Also, if someone
really writing beyond the allocated region, the Andrew's patch to
detect memory abuse posted on tech-kern few weeks ago might help.
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