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SubjectRe: 2.6.7-mm3: Kernel BUG on dual Opteron with DEBUG_SLAB
"R. J. Wysocki" <rjwysocki@sisk.pl> wrote:
>
> Kernel BUG at mempolicy:585

OK, this is a straight use-after-free bug:


--- 25/mm/mempolicy.c~a 2004-06-28 15:46:42.000000000 -0700
+++ 25-akpm/mm/mempolicy.c 2004-06-28 15:48:25.000000000 -0700
@@ -582,7 +582,7 @@ static struct zonelist *zonelist_policy(
break;
default:
nd = 0;
- BUG();
+ printk("%s: policy=%x\n", __FUNCTION__, policy->policy);
}
return NODE_DATA(nd)->node_zonelists + (gfp & GFP_ZONEMASK);
}
linux:/home/akpm> dmesg -s 1000000|grep zonelist
Built 1 zonelists
zonelist_policy: policy=6b6b
zonelist_policy: policy=6b6b
Andi, could you take a look? Enabling CONFIG_DEBUG_SLAB and CONFIG_NUMA
triggers it 100% of the time.
-
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