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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
