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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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