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xen-devel
Re: [Xen-devel] 2.6.32.22 (amd64) domU Kernel doesnt boot - kernel panic
On 09/21/2010 08:48 AM, Jeremy Fitzhardinge wrote:
> On 09/21/2010 03:02 AM, Giovanni Bellac wrote:
>> Hello
>>
>> I have used my 2.6.32.20 config and compiled now a 2.6.32.22 from
>> kernel.org.
>> 2.6.32.22 has the important security fix (local user can be root with
>> a exploit).
>>
>> When booting up the domU with the new kernel, it hangs here:
>>
>> [7061459.971314] installing Xen timer for CPU 0
>> [7061459.971338] BUG: unable to handle kernel NULL pointer dereference
>> at (null)
>> [7061459.971347] IP: [<(null)>] (null)
>
> Aiee - that's not good. I see the problem, but I'm not sure why I
> didn't see it in testing. Patch shortly.
No, its a little more subtle than I first thought (which is just as
well, because my first thought was a brain-stabbingly dumb bug). I'm
guessing its a race where the timer interrupt is being enabled too early
before its irq state has been set up properly, but I need to look at it
a bit more closely.
J
>> [7061459.971353] PGD 0
>> [7061459.971357] Thread overran stack, or stack corrupted
>> [7061459.971362] Oops: 0010 [#1] SMP
>> [7061459.971368] last sysfs file:
>> [7061459.971372] CPU 0
>> [7061459.971377] Modules linked in:
>> [7061459.971383] Pid: 0, comm: swapper Not tainted 2.6.32.22 #1
>> [7061459.971389] RIP: e030:[<0000000000000000>] [<(null)>] (null)
>> [7061459.971395] RSP: e02b:ffffffff81805da0 EFLAGS: 00010082
>> [7061459.971400] RAX: ffffffff81b62a50 RBX: 0000000000000000 RCX:
>> 00000000000002
>>
>>
>> 00
>> [7061459.971407] RDX: 0000000000000000 RSI: ffffffff81b434a8 RDI:
>> 00000000000000
>>
>>
>> 00
>> [7061459.971413] RBP: ffffffff81805db8 R08: ffff88007fc18080 R09:
>> ffffffff818937
>>
>>
>> 30
>> [7061459.971420] R10: ffffffff81893750 R11: 0000000000000001 R12:
>> ffffffff818272
>>
>>
>> 40
>> [7061459.971426] R13: ffff88007fc1b000 R14: 0000000000000000 R15:
>> ffffffff818272
>>
>>
>> a4
>> [7061459.971438] FS: 0000000000000000(0000) GS:ffff880001fd6000(0000)
>> knlGS:000
>>
>>
>> 0000000000000
>> [7061459.971445] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
>> [7061459.971450] CR2: 0000000000000000 CR3: 0000000001001000 CR4:
>> 00000000000026
>>
>>
>> 60
>> [7061459.971457] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
>> 00000000000000
>>
>>
>> 00
>> [7061459.971464] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
>> 00000000000004
>>
>>
>> 00
>> [7061459.971471] Process swapper (pid: 0, threadinfo ffffffff81804000,
>> task
>> ffff
>>
>>
>> ffff818979f0)
>> [7061459.971478] Stack:
>> [7061459.971481] ffffffff8107cac5 0000000000000000 00000000ffffffda
>> ffffffff818
>>
>>
>> 05dd8
>> [7061459.971490] <0> ffffffff8107caa5 ffffffff815a94b1
>> ffffffff81827240
>> ffffffff
>>
>>
>> 81805e18
>> [7061459.971502] <0> ffffffff8107c009 0000000000000200
>> ffff88007fc1b000
>> 00000000
>>
>>
>> fffffff4
>> [7061459.971515] Call Trace:
>> [7061459.971525] [<ffffffff8107cac5>] ? default_enable+0x1a/0x28
>> [7061459.971533] [<ffffffff8107caa5>] default_startup+0x19/0x1f
>> [7061459.971542] [<ffffffff815a94b1>] ? _spin_lock_irqsave+0x19/0x32
>> [7061459.971550] [<ffffffff8107c009>] __setup_irq+0x197/0x2cf
>> [7061459.971558] [<ffffffff8100e05f>] ? xen_timer_interrupt+0x0/0x182
>> [7061459.971565] [<ffffffff8107c22d>] request_threaded_irq+0xec/0x12b
>> [7061459.971575] [<ffffffff812b278c>] bind_virq_to_irqhandler+0x13f/0x163
>> [7061459.971582] [<ffffffff8100e05f>] ? xen_timer_interrupt+0x0/0x182
>> [7061459.971589] [<ffffffff8100e01a>] xen_setup_timer+0x59/0x9e
>> [7061459.971598] [<ffffffff8198d5a3>] xen_time_init+0xb7/0xc0
>> [7061459.971604] [<ffffffff8198da27>] x86_late_time_init+0xa/0x11
>> [7061459.971612] [<ffffffff81989c2f>] start_kernel+0x2fe/0x385
>> [7061459.971618] [<ffffffff819892bf>] x86_64_start_reservations+0xaa/0xae
>> [7061459.971626] [<ffffffff8198cad2>] xen_start_kernel+0x541/0x548
>> [7061459.971631] Code: Bad RIP value.
>> [7061459.971641] RIP [<(null)>] (null)
>> [7061459.971646] RSP <ffffffff81805da0>
>> [7061459.971650] CR2: 0000000000000000
>> [7061459.971660] ---[ end trace 4eaa2a86a8e2da22 ]---
>> [7061459.971665] Kernel panic - not syncing: Attempted to kill the
>> idle task!
>> [7061459.971671] Pid: 0, comm: swapper Tainted: G D 2.6.32.22 #1
>> [7061459.971676] Call Trace:
>> [7061459.971682] [<ffffffff815a7537>] panic+0xa0/0x158
>> [7061459.971688] [<ffffffff815a7656>] ? printk+0x67/0x69
>> [7061459.971696] [<ffffffff81055e60>] ?
>> blocking_notifier_call_chain+0xf/0x11
>> [7061459.971705] [<ffffffff81042b76>] do_exit+0x79/0x6c9
>> [7061459.971711] [<ffffffff815aa492>] oops_end+0xb9/0xc1
>> [7061459.971718] [<ffffffff8102aeed>] no_context+0x1ea/0x1f9
>> [7061459.971724] [<ffffffff8102b0b5>] __bad_area_nosemaphore+0x1b9/0x1df
>> [7061459.971733] [<ffffffff8108ec17>] ?
>> __alloc_pages_nodemask+0x11a/0x5e7
>> [7061459.971741] [<ffffffff8100dd01>] ? xen_force_evtchn_callback+0xd/0xf
>> [7061459.971747] [<ffffffff8100e352>] ? check_events+0x12/0x20
>> [7061459.971754] [<ffffffff8102b0e9>] bad_area_nosemaphore+0xe/0x10
>> [7061459.971761] [<ffffffff815ab98a>] do_page_fault+0x1a0/0x2d6
>> [7061459.971768] [<ffffffff815a9975>] page_fault+0x25/0x30
>> [7061459.971775] [<ffffffff8107cac5>] ? default_enable+0x1a/0x28
>> [7061459.971782] [<ffffffff8107caa5>] default_startup+0x19/0x1f
>> [7061459.971788] [<ffffffff815a94b1>] ? _spin_lock_irqsave+0x19/0x32
>> [7061459.971795] [<ffffffff8107c009>] __setup_irq+0x197/0x2cf
>> [7061459.971801] [<ffffffff8100e05f>] ? xen_timer_interrupt+0x0/0x182
>> [7061459.971808] [<ffffffff8107c22d>] request_threaded_irq+0xec/0x12b
>> [7061459.971815] [<ffffffff812b278c>] bind_virq_to_irqhandler+0x13f/0x163
>> [7061460.172264] [<ffffffff8100e05f>] ? xen_timer_interrupt+0x0/0x182
>> [7061460.172273] [<ffffffff8100e01a>] xen_setup_timer+0x59/0x9e
>> [7061460.172283] [<ffffffff8198d5a3>] xen_time_init+0xb7/0xc0
>> [7061460.172290] [<ffffffff8198da27>] x86_late_time_init+0xa/0x11
>> [7061460.172297] [<ffffffff81989c2f>] start_kernel+0x2fe/0x385
>> [7061460.172304] [<ffffffff819892bf>] x86_64_start_reservations+0xaa/0xae
>> [7061460.172311] [<ffffffff8198cad2>] xen_start_kernel+0x541/0x548
>>
>>
>>
>> dom0 is XEN 3.4.3 selfcompiled on Debian Lenny amd64.
>> Hardware is Supermicro Board with XEON E5506 CPU.
>>
>> Best regards
>> Gio
>>
>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
>
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