I can confirm this bug - although I did not explicitly switch to tap devices. My VM came "preconfigured" with tap (created by ConVirt)
2.6.22-14-xen #1 SMP Tue Feb 12 09:27:26 UTC 2008 i686 GNU/Linux [ 1944.442170] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000010 [ 1944.442247] printing eip: [ 1944.442268] c016049d [ 1944.442273] 2c6f8000 -> *pde = 00000000:51196001 [ 1944.442298] 2c196000 -> *pme = 00000000:00000000 [ 1944.442325] Oops: 0000 [#1] [ 1944.442346] SMP [ 1944.442377] Modules linked in: xt_physdev iptable_filter ip_tables x_tables binfmt_misc bridge af_packet nfsd exportfs lockd sunrpc ext2 nf_nat_irc nf_nat_ftp nf_nat nf_conntrack_irc nf_conntrack_ftp nf_conntrack_ipv4 nf_conntrack nfnetlink psmouse parport_pc lp parport ipv6 snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device pcspkr snd soundcore snd_page_alloc shpchp i2c_nforce2 pci_hotplug i2c_core nvidia_agp agpgart evdev ext3 jbd mbcache ide_disk amd74xx ide_core ata_generic libata scsi_mod ehci_hcd forcedeth ohci_hcd usbcore dm_mirror dm_snapshot dm_mod thermal processor fan capability commoncap fuse [ 1944.442946] CPU: 0 [ 1944.442947] EIP: 0061:[<c016049d>] Not tainted VLI [ 1944.442949] EFLAGS: 00210206 (2.6.22-14-xen #1) [ 1944.443024] EIP is at unmap_vmas+0x1bd/0xbf0 [ 1944.443049] eax: b7c9efff ebx: bfffffff ecx: 00000010 edx: b7c9f000 [ 1944.443077] esi: ec1b0f78 edi: b7b3e000 ebp: ec1b0d10 esp: ec1a1e4c [ 1944.443105] ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0069 [ 1944.443133] Process tapdisk (pid: 5622, ti=ec1a0000 task=ec652f90 task.ti=ec1a0000) [ 1944.443161] Stack: 00000000 00000000 c01181ee 00000000 00000000 b7c9efff 00000061 80000000 [ 1944.443245] 51135067 00000000 51135067 b7c9efff 51135067 00000000 0005ac95 00000000 [ 1944.443329] 5ac95000 00000000 0005ac95 00000000 5ac95000 00000000 b7b3e000 ec1b0d10 [ 1944.443413] Call Trace: [ 1944.443453] [<c01181ee>] kunmap_atomic+0x3e/0x60 [ 1944.443509] [<c016364c>] free_pgd_range+0x24c/0x350 [ 1944.443553] [<c0160f64>] zap_page_range+0x94/0xf0 [ 1944.443590] [<c02698ff>] blktap_release+0x4f/0x90 [ 1944.443627] [<c017ba2d>] __fput+0xad/0x1a0 [ 1944.443664] [<c0178e07>] filp_close+0x47/0x80 [ 1944.443697] [<c017a22b>] sys_close+0x6b/0xd0 [ 1944.443730] [<c01055a2>] syscall_call+0x7/0xb [ 1944.443772] ======================= [ 1944.443795] Code: 89 5c 24 7c 83 eb 01 39 c3 89 9c 24 bc 00 00 00 72 12 8b 94 24 c4 00 00 00 89 84 24 bc 00 00 00 89 54 24 7c 8b 8c 24 80 00 00 00 <8b> 31 8b 79 04 89 f0 83 e0 01 85 c0 74 4a 89 fa 89 f0 0f ac d0 [ 1944.444168] EIP: [<c016049d>] unmap_vmas+0x1bd/0xbf0 SS:ESP 0069:ec1a1e4c -- Kernel Ooops using File-backed VBDs https://bugs.launchpad.net/bugs/184412 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
