Re: Kernel panic with user namespaces

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Alexander Larsson <alexl@xxxxxxxxxx> writes:

> On mån, 2015-05-18 at 16:39 +0200, Alexander Larsson wrote:
>
> Didn't get any replies to the below kernel panic (testcase attached),
> which seems rather important to fix. Reposting to a wider audience.

Buggered backport greg already has the fix somewhere in his queue.

>> If I build and run the attached break-kernel.c as a user i get this
>> kernel panic on the fedora 4.0.3 kernel:
>> 
>> maj 18 16:33:36 nano kernel: BUG: unable to handle kernel NULL pointer dereference at           (null)
>> maj 18 16:33:36 nano kernel: IP: [<ffffffff81250288>] pin_remove+0x58/0xc0
>> maj 18 16:33:36 nano kernel: PGD 1cc973067 PUD 1d727b067 PMD 0 
>> maj 18 16:33:36 nano kernel: Oops: 0002 [#1] SMP 

Eric
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