From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: Paul Mackerras <paulus@ozlabs.org>
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 1/3] powerpc/mm: Don't alias user region to other regions below PAGE_OFFSET
Date: Sun, 04 Sep 2016 17:01:17 +0530 [thread overview]
Message-ID: <87h99vrjei.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <20160903095413.GA868@fergus.ozlabs.ibm.com>
Paul Mackerras <paulus@ozlabs.org> writes:
> On Fri, Sep 02, 2016 at 05:52:16PM +0530, Aneesh Kumar K.V wrote:
>>
>> Hi Paul,
>>
>> Really nice catch. Was this found by code analysis or do we have any
>> reported issue around this ?
>
> I found it by code analysis.
>
> I haven't been able to find any really bad consequence, beyond leaking
> some information about kernel memory. Can you find any worse
> consequence?
>
No, considering linux page table entry is not going to have a mapping
for this address.
-aneesh
next prev parent reply other threads:[~2016-09-04 11:31 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-02 11:47 [PATCH 1/3] powerpc/mm: Don't alias user region to other regions below PAGE_OFFSET Paul Mackerras
2016-09-02 11:49 ` [PATCH 2/3] powerpc/mm: Preserve CFAR value on SLB miss caused by access to bogus address Paul Mackerras
2016-09-04 11:30 ` Aneesh Kumar K.V
2016-09-07 5:52 ` Paul Mackerras
2016-09-13 12:16 ` [2/3] " Michael Ellerman
2016-09-02 11:50 ` [PATCH 3/3] powerpc/mm: Speed up computation of base and actual page size for a HPTE Paul Mackerras
2016-09-02 11:50 ` Paul Mackerras
2016-09-04 11:16 ` Aneesh Kumar K.V
2016-09-04 11:28 ` Aneesh Kumar K.V
2016-09-05 5:04 ` Aneesh Kumar K.V
2016-09-05 5:16 ` Aneesh Kumar K.V
2016-09-07 5:07 ` Paul Mackerras
2016-09-07 5:07 ` Paul Mackerras
2016-09-07 6:17 ` [PATCH v2 " Paul Mackerras
2016-09-08 10:08 ` Paul Mackerras
2016-09-08 10:08 ` Paul Mackerras
2016-09-08 10:16 ` Paolo Bonzini
2016-09-08 10:16 ` Paolo Bonzini
2016-09-12 0:58 ` Paul Mackerras
2016-09-12 0:58 ` Paul Mackerras
2016-09-12 3:03 ` Michael Ellerman
2016-09-12 3:03 ` Michael Ellerman
2016-09-12 9:45 ` Paolo Bonzini
2016-09-12 9:45 ` Paolo Bonzini
2016-09-02 12:22 ` [PATCH 1/3] powerpc/mm: Don't alias user region to other regions below PAGE_OFFSET Aneesh Kumar K.V
2016-09-03 9:54 ` Paul Mackerras
2016-09-04 11:31 ` Aneesh Kumar K.V [this message]
2016-09-08 9:47 ` [1/3] " Michael Ellerman
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