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[Xen-devel] Xen BUG at msi.c:391

To: Xen <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] Xen BUG at msi.c:391
From: Stephen Smalley <sds@xxxxxxxxxxxxx>
Date: Wed, 19 Aug 2009 15:03:12 -0400
Delivery-date: Wed, 19 Aug 2009 11:59:52 -0700
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I get the following BUG every time when trying to start xend after
booting the current xen-unstable tip (20088:4e2ffbd99aeb).  Yesterday's
tip was fine for me.  Only happens on x86_32.

(XEN) Xen BUG at msi.c:391                                                      
(XEN) ----[ Xen-3.5-unstable  x86_32p  debug=y  Not tainted ]----               
(XEN) CPU:    1                                                                 
(XEN) EIP:    e008:[<ff152aff>] msi_set_mask_bit+0x45/0x104                     
(XEN) EFLAGS: 00210046   CONTEXT: hypervisor                                    
(XEN) eax: 00000001   ebx: 00000000   ecx: ffb201a0   edx: 00000001             
(XEN) esi: 00000001   edi: 00000402   ebp: ffbcbdbc   esp: ffbcbd74             
(XEN) cr0: 8005003b   cr4: 000026f0   cr3: 002d0ca0   cr2: b7ff1ea0             
(XEN) ds: e010   es: e010   fs: 00d8   gs: 0033   ss: e010   cs: e008           
(XEN) Xen stack trace from esp=ffbcbd74:                                        
(XEN)    ffb2019c 00200282 00000020 00000000 80090000 00200082 ffbcbd9c ff1186ac
(XEN)    00000002 00200282 ffbcbdcc ff16309d ff204694 00200282 ffbcbdcc 00000402
(XEN)    ffb2019c 00000402 ffbcbdcc ff152d72 00000058 ffb20180 ffbcbdec ff14f583
(XEN)    00000402 00200086 ffbcbdec ff1186ac ffb20180 ffb2019c ffbcbe2c ff15445c
(XEN)    00000402 00000000 00000000 0000005a 00000086 00200282 00000000 00200286
(XEN)    80090000 00000058 0000005a 00000402 000007fd ff2f2000 ffbcbe4c ff15669f
(XEN)    00000402 00000009 ffbcbe8c ff1529db 00000009 ff2ce510 ffbcbe8c ff1535b7
(XEN)    00000402 00020100 ffbcbe8c ff152665 ffb2019c 00000001 00001ff4 00000000
(XEN)    00000018 00200086 ffbcbe8c 000007fd 000007fd ff2f2000 ffbcbeec ff155a2a
(XEN)    ff2ce510 00200286 00000000 ff116642 ff2d0024 d397995d 0000001c ffbf5988
(XEN)    00200286 00000402 ffb2019c 0000001c 00001ff4 00000402 ffb20180 ff2ce510
(XEN)    ffbcbf34 df365b20 00200202 fffffffd ff2f2000 ff2f2074 ffbcbf8c ff1639cd
(XEN)    ff2f2000 000007fd 00000008 ff10701e ffbcbf64 df365b20 00000004 00000000
(XEN)    ff2d0024 ffffffff 7fffffff 0000001c d3985cad 0000001c ffbcbf7c ff11a338
(XEN)    df367ff0 000007fd c0454f02 c0454efc ff2d0000 ff224100 d397995d 0000001c
(XEN)    ffbf5ad0 ffbf5ad0 ff2d0034 ff224100 00000018 aaaaaaaa aaaaaaaa ff274b80
(XEN)    0000007b ffbcbfb4 ffbcbfac ff2d0000 00000021 ffbcbfac 00434037 ff1cc038
(XEN)    0000000e df365b20 deadbeef deadbeef deadbeef deadbeef c0201427 00000021
(XEN)    0000000e df365b20 00000000 df7734a0 00001003 df365b34 00000021 00f90000
(XEN)    c0201427 00000061 00200202 df365b00 00000069 0000007b 0000007b 000000d8
(XEN) Xen call trace:                                                           
(XEN)    [<ff152aff>] msi_set_mask_bit+0x45/0x104                               
(XEN)    [<ff152d72>] mask_msi_irq+0x16/0x23                                    
(XEN)    [<ff14f583>] shutdown_msi_irq+0x11/0x13                                
(XEN)    [<ff15445c>] dynamic_irq_cleanup+0x31/0x8b                             
(XEN)    [<ff15669f>] destroy_irq+0x2c/0x3d                                     
(XEN)    [<ff1535b7>] msi_free_irq+0x158/0x172                                  
(XEN)    [<ff155a2a>] unmap_domain_pirq+0x28c/0x30b                             
(XEN)    [<ff1639cd>] do_physdev_op+0x84e/0xf31                                 
(XEN)    [<ff1cc038>] hypercall+0xb8/0xd8                                       
(XEN) ****************************************                                  
(XEN) Panic on CPU 1:                                                           
(XEN) Xen BUG at msi.c:391                                                      
(XEN) ****************************************

Stephen Smalley
National Security Agency

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