linux-kernel - Re: i386, v3.6-rc3: Kernel panic - not syncing: Fatal exception in interrupt

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Message-ID: <20120904153312.GV8285@erda.amd.com>
Date:	Tue, 4 Sep 2012 17:33:12 +0200
From:	Robert Richter <robert.richter@....com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	Ingo Molnar <mingo@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: i386, v3.6-rc3: Kernel panic - not syncing: Fatal exception in
 interrupt

On 04.09.12 11:16:16, Steven Rostedt wrote:
> On Tue, 2012-08-28 at 10:12 +0200, Robert Richter wrote:

> > BUG: unable to handle kernel NULL pointer dereference at 00000040
> > IP: [<c100422f>] print_context_stack+0x6e/0x8d
> > *pde = 00000000 
> > Oops: 0000 [#1] SMP 
> > Modules linked in:
> > 
> > Pid: 15531, comm: perl Not tainted 3.5.0-oprofile-i386-standard-g28a33cb #2 Hewlett-Packard HP xw9400 Workstation/0A1Ch
> > EIP: 0060:[<c100422f>] EFLAGS: 00010097 CPU: 3
> > EIP is at print_context_stack+0x6e/0x8d
> > EAX: ffffe000 EBX: 00000040 ECX: f4bd1f94 EDX: 00000040
> > ESI: f4bd1f94 EDI: f4bd1f94 EBP: f5517ec0 ESP: f5517ea0
> >  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
> > CR0: 8005003b CR2: 00000040 CR3: 34403000 CR4: 000007d0
> > DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
> > DR6: ffff0ff0 DR7: 00000400
> > Process perl (pid: 15531, ti=f5516000 task=f4f6bbc0 task.ti=f4bd0000)
> > Stack:
> >  000003e8 ffffe000 00001ffc f4b8e380 00000000 00000040 f4bd1f94 c1541178
> >  f5517ef0 c1003717 c1541178 f5517f04 00000000 f5517edc 00000000 00000000
> >  f5517ee8 f4bd1f94 f5517fc4 00000001 f5517f1c c12d3ba4 00000000 c1541178
> > Call Trace:
> >  [<c1003717>] dump_trace+0x7b/0xa1
> >  [<c12d3ba4>] x86_backtrace+0x40/0x88
> >  [<c12d2498>] ? oprofile_add_sample+0x56/0x84
> >  [<c12d24b7>] oprofile_add_sample+0x75/0x84
> >  [<c12d48e3>] op_amd_check_ctrs+0x46/0x260
> >  [<c10328b9>] ? wake_up_worker+0x19/0x1b
> >  [<c103331a>] ? insert_work+0x58/0x5c
> >  [<c12d4195>] profile_exceptions_notify+0x23/0x4c
> >  [<c138b497>] nmi_handle+0x31/0x4a
> >  [<c102734f>] ? ftrace_define_fields_irq_handler_entry+0x45/0x45
> >  [<c138b559>] do_nmi+0xa9/0x304
> >  [<c102c2e7>] ? run_timer_softirq+0x2a/0x1f5
> >  [<c102734f>] ? ftrace_define_fields_irq_handler_entry+0x45/0x45
> >  [<c138ae4d>] nmi_stack_correct+0x28/0x2d
> >  [<c102734f>] ? ftrace_define_fields_irq_handler_entry+0x45/0x45
> >  [<c10035f7>] ? do_softirq+0x4b/0x7f
> >  <IRQ> 
> >  [<c10275cc>] irq_exit+0x35/0x5b
> >  [<c101689e>] smp_apic_timer_interrupt+0x6c/0x7a
> >  [<c138abae>] apic_timer_interrupt+0x2a/0x30
> > Code: 89 fe eb 08 31 c9 8b 45 0c ff 55 ec 83 c3 04 83 7d 10 00 74 0c 3b 5d 10 73 26 3b 5d e4 73 0c eb 1f 3b 5d f0 76 1a 3b 5d e8 73 15 <8b> 13 89 d0 89 55 e0 e8 9d 16 03 00 85 c0 8b 55 e0 75 a6 eb cc 
> > EIP: [<c100422f>] print_context_stack+0x6e/0x8d SS:ESP 0068:f5517ea0
> > CR2: 0000000000000040
> > ---[ end trace 0cce5d2b7aa480ce ]---
> > Kernel panic - not syncing: Fatal exception in interrupt
> 
> Could you send me the config file and post the entire dmesg somewhere.

Wei found the root cause of this that is a wrong calcuation in
kernel_stack_pointer() in softirq context for i386. I sent a fix, see
my today's mail with subject:

 Re: [PATCH 1/1] x86/oprofile: Fix the calltrace upon profiling some specified events with oprofile.

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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