[ 416.862048] BUG: unable to handle kernel NULL pointer dereference at 00000000000000cc [ 417.041300] IP: [] e1000_clean_tx_irq+0xfb/0x3a0 [e1000] [ 417.041300] PGD 593ef067 PUD 592c0067 PMD 0 [ 417.041300] Oops: 0000 [#1] SMP [ 417.041300] last sysfs file: /sys/module/x_tables/initstate [ 417.041300] CPU 1 [ 417.041300] Modules linked in: xt_tcpudp iptable_filter ip_tables x_tables vboxsf nfs lockd nfs_acl auth_rpcgss sunrpc ppdev fbcon tileblit 0 [ 417.041300] Pid: 0, comm: swapper Not tainted 2.6.32-24-server #39-Ubuntu VirtualBox [ 417.041300] RIP: 0010:[] [] e1000_clean_tx_irq+0xfb/0x3a0 [e1000] [ 417.041300] RSP: 0018:ffff880001d03d80 EFLAGS: 00010246 [ 417.041300] RAX: 0000000000000000 RBX: 0000000000000045 RCX: ffff88005514e000 [ 417.041300] RDX: 0000000000000045 RSI: ffffc900009c6ac8 RDI: ffff880059bbc680 [ 417.041300] RBP: ffff880001d03e20 R08: ffff88005514e450 R09: ffffc900009c6000 [ 417.041300] R10: 0000000000000100 R11: 0000000000000001 R12: 0000000000000045 [ 417.041300] R13: ffff88005b412400 R14: ffff88005514e000 R15: 0000000000000000 [ 417.041300] FS: 0000000000000000(0000) GS:ffff880001d00000(0000) knlGS:0000000000000000 [ 417.041300] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [ 417.041300] CR2: 00000000000000cc CR3: 00000000593ee000 CR4: 00000000000006e0 [ 417.041300] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 417.041300] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 417.041300] Process swapper (pid: 0, threadinfo ffff88005bfde000, task ffff88005bfd44d0) [ 417.041300] Stack: [ 417.041300] ffff8800591bae18 ffff880001c15c30 0000000000000001 0000000000000000 [ 417.041300] <0> ffff880001d03e60 ffff880001d03dd8 ffffffff8105ee02 0000000000015bc0 [ 417.041300] <0> ffff8800591bae18 ffff880001c15bc0 ffff880059bbc000 ffff880059bbc680 [ 417.041300] Call Trace: [ 417.041300] [ 417.041300] [] ? enqueue_entity+0x122/0x1a0 [ 417.041300] [] e1000_clean+0x3d/0x230 [e1000] [ 417.041300] [] net_rx_action+0x10f/0x250 [ 417.041300] [] ? __hrtimer_start_range_ns+0x189/0x400 [ 417.041300] [] __do_softirq+0xb7/0x1e0 [ 417.041300] [] ? ack_apic_level+0x82/0x1f0 [ 417.041300] [] call_softirq+0x1c/0x30 [ 417.041300] [] do_softirq+0x65/0xa0 [ 417.041300] [] irq_exit+0x85/0x90 [ 417.041300] [] do_IRQ+0x75/0xf0 [ 417.041300] [] ret_from_intr+0x0/0x11 [ 417.041300] [ 417.041300] [] ? native_safe_halt+0xb/0x10 [ 417.041300] [] ? default_idle+0x3d/0x90 [ 417.041300] [] ? cpu_idle+0xb3/0x110 [ 417.041300] [] ? start_secondary+0xa8/0xaa [ 417.041300] Code: 03 41 83 c7 01 80 7d cc 00 75 55 4d 8b 75 00 4d 8b 4d 20 44 89 e3 44 3b 65 c8 48 8d 04 9b 49 8d 34 c1 0f 94 45 cc 75 a7 48 [ 417.041300] RIP [] e1000_clean_tx_irq+0xfb/0x3a0 [e1000] [ 417.041300] RSP [ 417.041300] CR2: 00000000000000cc