$ uname -r ; rpm -q libvirt qemu-system-x86 3.11.10-301.fc20.x86_64 libvirt-1.1.3.1-2.fc20.x86_64 qemu-system-x86-1.6.1-2.fc20.x86_64 ======================== . . . localhost login: root Password: [ 54.315075] PANIC: double fault, error_code: 0x0 [ 54.315075] CPU: 0 PID: 280 Comm: firewalld Not tainted 3.11.10-301.fc20.x86_64 #1 [ 54.315075] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 54.315075] task: ffff88007a693560 ti: ffff8800376e0000 task.ti: ffff8800376e0000 [ 54.315075] RIP: 0033:[<00007feab3af46a4>] [<00007feab3af46a4>] 0x7feab3af46a3 [ 54.315075] RSP: 002b:00007fff295ef810 EFLAGS: 00010202 [ 54.315075] RAX: 00000000023dec70 RBX: 0000000000000032 RCX: 0000000000000e14 [ 54.315075] RDX: 00000000023de000 RSI: 00007feab3dfbf70 RDI: 0000000000000032 [ 54.315075] RBP: 0000000000000006 R08: 0000000000000000 R09: 00000000023ec0bd [ 54.315075] R10: 0000000000000000 R11: 0000000000000008 R12: 000000000000000c [ 54.315075] R13: 00007feab3dfbf20 R14: 000000000243dc58 R15: 000000000243dac0 [ 54.315075] FS: 00007feab4046740(0000) GS:ffff88007fc00000(0000) knlGS:0000000000000000 [ 54.315075] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.315075] CR2: 0000000000000000 CR3: 00000000376f3000 CR4: 00000000000006f0 [ 54.315075] [ 54.315075] Kernel panic - not syncing: Machine halted. [ 54.315075] CPU: 0 PID: 280 Comm: firewalld Not tainted 3.11.10-301.fc20.x86_64 #1 [ 54.315075] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 54.315075] ffff88007fc05f58 ffff88007fc05e90 ffffffff816441db ffffffff819e9ce4 [ 54.315075] ffff88007fc05f08 ffffffff81640202 0000000000000008 ffff88007fc05f18 [ 54.315075] ffff88007fc05eb8 ffffffff81640875 0000000000000046 0000000000000007 [ 54.315075] Call Trace: [ 54.315075] <#DF> [] dump_stack+0x45/0x56 [ 54.315075] [] panic+0xc8/0x1d7 [ 54.315075] [] ? printk+0x67/0x69 [ 54.315075] [] df_debug+0x31/0x40 [ 54.315075] [] do_double_fault+0x5d/0x80 [ 54.315075] [] double_fault+0x28/0x30 [ 54.315075] <> ========================