id summary reporter owner description type status component version resolution keywords cc guest host 4527 BUG: unable to handle kernel NULL pointer dereference at 00000004 Davide Repetto "On Fedora 11 Host, with kernel 2.6.29.5-191.fc11.i686.PAE, closing a Virtual machine often does the following to the kernel: ''(see the verbose text below)''[[BR]] After that, bad juju happens and the whole machine becomes unstable. || {{{ Jul 14 23:04:28 dave kernel: device eth0 entered promiscuous mode Jul 14 23:15:11 dave kernel: device eth0 left promiscuous mode Jul 14 23:15:14 dave kernel: BUG: unable to handle kernel NULL pointer dereference at 00000004 Jul 14 23:15:14 dave kernel: IP: [] __ticket_spin_lock+0x8/0x19 Jul 14 23:15:14 dave kernel: *pdpt = 000000002f582001 *pde = 00000000431ab067 Jul 14 23:15:14 dave kernel: Oops: 0002 [#1] SMP Jul 14 23:15:14 dave kernel: last sysfs file: /sys/devices/pci0000:00/0000:00:1f.1/host0/target0:0:1/0:0:1:0/block/sdb/sdb1/stat Jul 14 23:15:14 dave kernel: Modules linked in: fuse vboxnetadp vboxnetflt vboxdrv nls_utf8 cifs vmnet vmblock vmci vmmon ipv6 kqemu dm_multipath uinput snd_intel8x0 snd_ac97_codec ac97_bus ppdev nvidia(P) snd_pcm parport_pc snd_timer snd i2c_i801 iTCO_wdt floppy parport soundcore e100 mii sata_sil i2c_core iTCO_vendor_support snd_page_alloc ata_generic pata_acpi [last unloaded: microcode] Jul 14 23:15:14 dave kernel: Jul 14 23:15:14 dave kernel: Pid: 7, comm: events/0 Tainted: P (2.6.29.5-191.fc11.i686.PAE #1) Jul 14 23:15:14 dave kernel: EIP: 0060:[] EFLAGS: 00010202 CPU: 0 Jul 14 23:15:14 dave kernel: EIP is at __ticket_spin_lock+0x8/0x19 Jul 14 23:15:14 dave kernel: EAX: 00000004 EBX: ef0566c0 ECX: 00000246 EDX: 00000100 Jul 14 23:15:14 dave kernel: ESI: ef056610 EDI: ef0566bc EBP: f6a83f54 ESP: f6a83f54 Jul 14 23:15:14 dave kernel: DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 Jul 14 23:15:14 dave kernel: Process events/0 (pid: 7, ti=f6a82000 task=f70ccbc0 task.ti=f6a82000) Jul 14 23:15:14 dave kernel: Stack: Jul 14 23:15:14 dave kernel: f6a83f5c c0716589 f6a83f64 f9fcf5fd f6a83f8c f9fcb1c8 00000000 f6a83f7c Jul 14 23:15:14 dave kernel: 00000000 0000048f 00000000 ef0566c0 f6a6a580 ef0566bc f6a83fa8 c044392b Jul 14 23:15:14 dave kernel: f6a6a584 f9fcb1a1 f6a6a580 f6a6a584 f6a6a58c f6a83fd0 c0443a70 00000000 Jul 14 23:15:14 dave kernel: Call Trace: Jul 14 23:15:14 dave kernel: [] ? _spin_lock+0xd/0x10 Jul 14 23:15:14 dave kernel: [] ? RTSpinlockAcquire+0x13/0x15 [vboxnetflt] Jul 14 23:15:14 dave kernel: [] ? vboxNetFltLinuxXmitTask+0x27/0x174 [vboxnetflt] Jul 14 23:15:14 dave kernel: [] ? run_workqueue+0x8e/0x118 Jul 14 23:15:14 dave kernel: [] ? vboxNetFltLinuxXmitTask+0x0/0x174 [vboxnetflt] Jul 14 23:15:14 dave kernel: [] ? worker_thread+0xbb/0xc7 Jul 14 23:15:14 dave kernel: [] ? autoremove_wake_function+0x0/0x34 Jul 14 23:15:14 dave kernel: [] ? worker_thread+0x0/0xc7 Jul 14 23:15:14 dave kernel: [] ? kthread+0x41/0x65 Jul 14 23:15:14 dave kernel: [] ? kthread+0x0/0x65 Jul 14 23:15:14 dave kernel: [] ? kernel_thread_helper+0x7/0x10 Jul 14 23:15:14 dave kernel: Code: 4f fd ff ff 5b eb 13 56 0f b7 d2 ff 75 08 89 d9 0f b6 c0 e8 6e fd ff ff 5a 59 8d 65 f8 5b 5e 5d c3 90 90 55 ba 00 01 00 00 89 e5 <3e> 66 0f c1 10 38 f2 74 06 f3 90 8a 10 eb f6 5d c3 55 89 c2 89 Jul 14 23:15:14 dave kernel: EIP: [] __ticket_spin_lock+0x8/0x19 SS:ESP 0068:f6a83f54 Jul 14 23:15:14 dave kernel: ---[ end trace 1ef8487d0321cf6f ]--- }}} || " defect closed network/hostif VirtualBox 3.0.2 fixed other Linux