Comment 36 for bug 978320

Now i retested with current kernel using command line
kvm -hda launchpad.img -cdrom precise-mini.iso -boot d -m 512 -curses

The vm hangs showing bios iPXE ... Press Ctrl-B ... message

and it still triggers the kernel BUG:

Apr 11 23:12:21 ba kernel: [ 143.771843] ------------[ cut here ]------------
Apr 11 23:12:21 ba kernel: [ 143.771918] kernel BUG at /build/buildd/linux-3.2.0/arch/x86/kvm/../../../virt/kvm/kvm_main.c:2367!
Apr 11 23:12:21 ba kernel: [ 143.772049] invalid opcode: 0000 [#1] SMP
Apr 11 23:12:21 ba kernel: [ 143.772130] CPU 0
Apr 11 23:12:21 ba kernel: [ 143.772157] Modules linked in: ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables bridge kvm_amd kvm s3fb svgalib 8021q fb_ddc i2c_algo_bit garp vgastate stp edac_core lp i2c_nforce2 edac_mce_amd psmouse k10temp serio_raw mac_hid parport video mxm_wmi wmi raid10 raid456 async_pq async_xor xor async_memcpy async_raid6_recov e1000e pata_amd usb_storage raid6_pq async_tx raid1 raid0 multipath linear
Apr 11 23:12:21 ba kernel: [ 143.773332]
Apr 11 23:12:21 ba kernel: [ 143.773353] Pid: 2954, comm: kvm Not tainted 3.2.0-23-generic #36-Ubuntu To Be Filled By O.E.M. To Be Filled By O.E.M./K10N78hSLI-GLAN
Apr 11 23:12:21 ba kernel: [ 143.773557] RIP: 0010:[<ffffffffa015c7b9>] [<ffffffffa015c7b9>] kvm_spurious_fault+0x9/0x10 [kvm]
Apr 11 23:12:21 ba kernel: [ 143.773714] RSP: 0018:ffff8802117d1d00 EFLAGS: 00010046
Apr 11 23:12:21 ba kernel: [ 143.773793] RAX: ffff88020db20000 RBX: ffff88020fe18000 RCX: ffff88020fe18000
Apr 11 23:12:21 ba kernel: [ 143.773896] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88020fe18000
Apr 11 23:12:21 ba kernel: [ 143.774000] RBP: ffff8802117d1d00 R08: 0000000000000000 R09: 0000000000000000
Apr 11 23:12:21 ba kernel: [ 143.774105] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88020f85ade0
Apr 11 23:12:21 ba kernel: [ 143.774209] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88020f85ade0
Apr 11 23:12:21 ba kernel: [ 143.774314] FS: 00007fae074e6700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
Apr 11 23:12:21 ba kernel: [ 143.774433] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Apr 11 23:12:21 ba kernel: [ 143.774641] CR2: 00007ffc9d5f4160 CR3: 000000020da68000 CR4: 00000000000006f0
Apr 11 23:12:21 ba kernel: [ 143.774872] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 11 23:12:21 ba kernel: [ 143.775099] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Apr 11 23:12:21 ba kernel: [ 143.775326] Process kvm (pid: 2954, threadinfo ffff8802117d0000, task ffff88020f85ade0)
Apr 11 23:12:21 ba kernel: [ 143.775673] Stack:
Apr 11 23:12:21 ba kernel: [ 143.775787] ffff8802117d1d58 ffffffffa01e60eb ffffffffa01e1dec ffff8802117d1d38
Apr 11 23:12:21 ba kernel: [ 143.775787] ffff88020fe18000 ffff8802117d1d38 ffff88020fe18000 ffff88020f85ade0
Apr 11 23:12:21 ba kernel: [ 143.775787] 0000000000000000 0000000000000000 ffff88020f85ade0 ffff8802117d1d98
Apr 11 23:12:21 ba kernel: [ 143.775787] Call Trace:
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffffa01e60eb>] cr8_write_interception+0x10b/0x16b [kvm_amd]
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffffa01e1dec>] ? svm_vcpu_run+0x11c/0x4a0 [kvm_amd]
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffffa0176745>] vcpu_enter_guest+0x165/0x590 [kvm]
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffffa01770f8>] __vcpu_run+0x158/0x2d0 [kvm]
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffffa01772ee>] kvm_arch_vcpu_ioctl_run+0x7e/0x150 [kvm]
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffffa0160182>] kvm_vcpu_ioctl+0x4e2/0x780 [kvm]
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffff8165c46e>] ? _raw_spin_lock+0xe/0x20
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffff8109ee33>] ? futex_wake+0x113/0x130
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffff81189cfa>] do_vfs_ioctl+0x8a/0x340
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffff810a0b5a>] ? sys_futex+0x10a/0x1a0
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffff8118a041>] sys_ioctl+0x91/0xa0
Apr 11 23:12:21 ba kernel: [ 143.775787] [<ffffffff81664a82>] system_call_fastpath+0x16/0x1b
Apr 11 23:12:21 ba kernel: [ 143.775787] Code: c8 c4 00 00 48 8b 80 38 e0 ff ff a8 08 75 02 5d c3 e8 dc da 4f e1 5d c3 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 66 66 66 66 90 <0f> 0b 0f 1f 44 00 00 55 48 89 e5 53 48 83 ec 08 66 66 66 66 90
Apr 11 23:12:21 ba kernel: [ 143.775787] RIP [<ffffffffa015c7b9>] kvm_spurious_fault+0x9/0x10 [kvm]
Apr 11 23:12:21 ba kernel: [ 143.775787] RSP <ffff8802117d1d00>
Apr 11 23:12:21 ba kernel: [ 143.775787] ---[ end trace 0d7f23bd2743763a ]---