linux-kernel - Re: BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 on 3.5-rc6

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Message-ID: <CAHdPZaM3Xq9=HLJztQe2hW7mxwatYeeUV7AKnCEr0xzpTJwQRg@mail.gmail.com>
Date:	Sat, 14 Jul 2012 21:18:04 +0545
From:	"devendra.aaru" <devendra.aaru@...il.com>
To:	richard -rw- weinberger <richard.weinberger@...il.com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Jiri Kosina <jkosina@...e.cz>,
	Darren Hart <dvhart@...ux.intel.com>,
	Kees Cook <keescook@...omium.org>, a.p.zijlstra@...llo.nl
Subject: Re: BUG: unable to handle kernel NULL pointer dereference at
 0000000000000010 on 3.5-rc6

On Sat, Jul 14, 2012 at 8:07 PM, richard -rw- weinberger
<richard.weinberger@...il.com> wrote:
> On Sat, Jul 14, 2012 at 2:11 PM, devendra.aaru <devendra.aaru@...il.com> wrote:
>> 3.5-rc6 with git head at fdb1335a82e. (from Torvald's branch)
>
> CC'in futex guys...
>
>> dmesg:
>>
>> [43610.535421] BUG: unable to handle kernel NULL pointer dereference
>> at 0000000000000010
>
> Is this the first error message in dmesg?
No its not. and i was doing a dmesg -c and run... thats bad i should
not be doing that..
> IOW no WARNING before the BUG?
yeah there were some warnings about the trinity.
>
> Looks like futex_wait_requeue_pi() was called before  pi_state->pi_mutex got
> initialized.
>

Let me reproduce it again... and i will report it with full dmesg again.
> --
> Thanks,
> //richard

Thanks,
Devendra.
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