[Xen-devel] Assertion 'cpu < nr_cpu_ids' failed at .../src/new/xen-unstable/xen/include/xen/cpumask.h:97

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Hi,

While shutting down all guests to go for a host reboot i encountered the splat 
below.
This was running on Xen with:
xen_changeset: Fri Feb 20 16:21:10 2015 +0100 git:24b2b8d-dirty

--
Sander

(XEN) [2015-02-23 09:16:26.292] Assertion 'cpu < nr_cpu_ids' failed at 
.../src/new/xen-unstable/xen/include/xen/cpumask.h:97
(XEN) [2015-02-23 09:16:26.292] ----[ Xen-4.6-unstable  x86_64  debug=y  Not 
tainted ]----
(XEN) [2015-02-23 09:16:26.292] CPU:    1
(XEN) [2015-02-23 09:16:26.292] RIP:    e008:[<ffff82d08012c018>] 
cpu_raise_softirq+0xd7/0xeb
(XEN) [2015-02-23 09:16:26.292] RFLAGS: 0000000000010202   CONTEXT: hypervisor
(XEN) [2015-02-23 09:16:26.292] rax: ffff82d080328e60   rbx: 0000000000000005   
rcx: ffff82d0802fff80
(XEN) [2015-02-23 09:16:26.292] rdx: ffff83054eb680e0   rsi: 0000000000000007   
rdi: 0000000000000000
(XEN) [2015-02-23 09:16:26.292] rbp: ffff83054eb67328   rsp: ffff83054eb67308   
r8:  0000000000000001
(XEN) [2015-02-23 09:16:26.292] r9:  ffff83054eb1a240   r10: 0000000000000000   
r11: 0000000000000000
(XEN) [2015-02-23 09:16:26.292] r12: 0000000000000007   r13: 0000000000000001   
r14: 000000000000000e
(XEN) [2015-02-23 09:16:26.292] r15: 00000000000008f8   cr0: 000000008005003b   
cr4: 00000000000006f0
(XEN) [2015-02-23 09:16:26.292] cr3: 0000000476850000   cr2: 00007ffd07e91f20
(XEN) [2015-02-23 09:16:26.292] ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 
0000   cs: e008
(XEN) [2015-02-23 09:16:26.292] Xen stack trace from rsp=ffff83054eb67308:
(XEN) [2015-02-23 09:16:26.292]    000000000000000e ffff83009fd4b000 
0000000000000001 ffff83009fd4b000
(XEN) [2015-02-23 09:16:26.292]    ffff83054eb67348 ffff82d080167c90 
0000000000000000 ffff83009fd4b418
(XEN) [2015-02-23 09:16:26.292]    ffff83054eb67378 ffff82d0801cf411 
ffff83054eb673a8 ffff83009fd4b000
(XEN) [2015-02-23 09:16:26.292]    ffff83009fd41418 0000000000000000 
ffff83054eb67398 ffff82d0801cf51f
(XEN) [2015-02-23 09:16:26.292]    ffff83009fd4b000 ffff83009fd41418 
ffff83054eb673e8 ffff82d0801cfd50
(XEN) [2015-02-23 09:16:26.292]    ffff83054eb67418 00000001011ef7e2 
ffff830300000000 ffff83009fd41000
(XEN) [2015-02-23 09:16:26.292]    0000000000000300 00000000000008f8 
00000000000008f8 ffff83009fd41000
(XEN) [2015-02-23 09:16:26.292]    ffff83054eb67448 ffff82d0801d0657 
ffff83054eb67458 ffff82d0801f5d11
(XEN) [2015-02-23 09:16:26.292]    000000004eb67594 0000000000000000 
0000000000000000 0000000000000000
(XEN) [2015-02-23 09:16:26.292]    ffff8303d7bd6000 0000000000000300 
0000000000000004 ffff83009fd41000
(XEN) [2015-02-23 09:16:26.292]    ffff83054eb674a8 ffff82d0801d0b58 
ffff83054eb674a8 ffff82d080178a6c
(XEN) [2015-02-23 09:16:26.292]    0000000002211067 ffff83054eb674e4 
80000000fee0017b ffff82d080289a68
(XEN) [2015-02-23 09:16:26.292]    ffff82d0801cf175 ffff82d0801ceb87 
ffff83054eb67568 ffff83009fd41000
(XEN) [2015-02-23 09:16:26.292]    ffff83054eb67518 ffff82d0801c6747 
ffff830500000000 ffff82d080289fa0
(XEN) [2015-02-23 09:16:26.292]    ffff82d0801cf175 ffff82d0801d09d7 
ffff83054eb674e8 0000000080227575
(XEN) [2015-02-23 09:16:26.292]    ffff83054eb67548 ffff83009fd41000 
ffff8305356de000 0000000000000004
(XEN) [2015-02-23 09:16:26.292]    ffff82e008f4e3c0 0000000000000000 
ffff83054eb675b8 ffff82d0801b7023
(XEN) [2015-02-23 09:16:26.292]    0000000000000004 0000000000000300 
ffff83054eb67618 000000014eb67618
(XEN) [2015-02-23 09:16:26.292]    00000000fee00300 010082d000000000 
ffff83054eb67578 0000000000000004
(XEN) [2015-02-23 09:16:26.292]    00000000fee00300 00000000000008f8 
0000000400000001 0100000000000000
(XEN) [2015-02-23 09:16:26.292] Xen call trace:
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d08012c018>] 
cpu_raise_softirq+0xd7/0xeb
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d080167c90>] vcpu_kick+0x65/0x6f
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801cf411>] vlapic_set_irq+0xb6/0xc4
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801cf51f>] 
vlapic_accept_irq+0x91/0x1ca
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801cfd50>] vlapic_ipi+0x28b/0x2ae
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801d0657>] 
vlapic_reg_write+0x215/0x595
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801d0b58>] vlapic_write+0x181/0x1f7
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801c6747>] 
hvm_mmio_intercept+0x14d/0x36a
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801b7023>] 
hvmemul_do_io+0x440/0x66b
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801b727b>] 
hvmemul_do_mmio+0x2d/0x2f
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801b88de>] 
hvmemul_write+0x1d8/0x24c
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801a1c9f>] 
x86_emulate+0xc97b/0x1010c
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801b76da>] 
_hvm_emulate_one+0x197/0x2bb
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801b78bf>] 
hvm_emulate_one+0x10/0x12
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801c6eb4>] handle_mmio+0x54/0xd4
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801c6f78>] 
handle_mmio_with_translation+0x44/0x46
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801c5264>] 
hvm_hap_nested_page_fault+0x163/0x541
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801db3f7>] 
svm_vmexit_handler+0x16bf/0x19bc
(XEN) [2015-02-23 09:16:26.292]    [<ffff82d0801dd352>] svm_stgi_label+0x8/0x46
(XEN) [2015-02-23 09:16:26.292] 
(XEN) [2015-02-23 09:16:27.613] 
(XEN) [2015-02-23 09:16:27.622] ****************************************
(XEN) [2015-02-23 09:16:27.642] Panic on CPU 1:
(XEN) [2015-02-23 09:16:27.654] Assertion 'cpu < nr_cpu_ids' failed at 
.../src/new/xen-unstable/xen/include/xen/cpumask.h:97
(XEN) [2015-02-23 09:16:27.687] ****************************************
(XEN) [2015-02-23 09:16:27.706] 
(XEN) [2015-02-23 09:16:27.715] Manual reset required ('noreboot' specified)


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