Re: kern/40651: kmem_alloc() returns misaligned pointers

[enami tsugutomo <enami%sm.sony.co.jp@localhost>]

The following reply was made to PR kern/40651; it has been noted by GNATS.

From: enami tsugutomo <enami%sm.sony.co.jp@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost, 
netbsd-bugs%NetBSD.org@localhost,
        martin%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.
 
 enami.