Re: hugetlb: NULL ptr deref in region_truncate

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On Sun, Sep 8, 2013 at 10:46 PM, Sasha Levin <sasha.levin@xxxxxxxxxx> wrote:
> Hi all,
>
> While fuzzing with trinity inside a KVM tools guest, running latest -next
> kernel, I've
> stumbled on the following:
>
> [  998.281867] BUG: unable to handle kernel NULL pointer dereference at
> 0000000000000274
> [  998.283333] IP: [<ffffffff812707c4>] region_truncate+0x64/0xd0
> [  998.284288] PGD 0
> [  998.284717] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
> [  998.286506] Modules linked in:
> [  998.287101] CPU: 88 PID: 24650 Comm: trinity-child85 Tainted: G    B   W
> 3.11.0-next-20130906-sasha #3985

 *  'B' - System has hit bad_page?

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