Comment 8 for bug 1091169

Tried both kernels on my machines, on 3.6.11 my network and keyboard were dead, 3.5.7.2 didn't boot at all (kernel panic in initramfs).

I've downloaded kubuntu raring alpha 1 with linux-image-3.7.0-4-generic (3.7.0-4.12) and the problem persists, though with a slightly different call trace:

[ 253.542823] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 253.542846] IP: [< (null)>] (null)
[ 253.542854] PGD 231c40067 PUD 225df9067 PMD 0
[ 253.542863] Oops: 0010 [#1] SMP
[ 253.542870] Modules linked in: des_generic(F) md4(F) nls_utf8 cifs(F) fscache(F) dm_crypt(F) snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep(F) snd_pcm(F) coretemp snd_page_alloc(F) snd_seq_midi(F) snd_seq_midi_event(F) gpio_ich kvm snd_rawmidi(F) dm_multipath(F) scsi_dh lpc_ich snd_seq(F) dcdbas snd_seq_device(F) snd_timer(F) i5400_edac mac_hid edac_core serio_raw(F) parport_pc(F) bnep snd(F) rfcomm microcode(F) i5k_amb ppdev(F) shpchp soundcore(F) bluetooth lp(F) parport(F) squashfs(F) overlayfs(F) nls_iso8859_1(F) dm_mirror(F) dm_region_hash(F) dm_log(F) hid_generic usbhid hid usb_storage(F) uas nouveau mxm_wmi wmi video(F) i2c_algo_bit firewire_ohci ttm firewire_core drm_kms_helper crc_itu_t(F) drm mptsas(F) mptscsih(F) mptbase(F) scsi_transport_sas(F) tg3
[ 253.542995] CPU 3
[ 253.542999] Pid: 5407, comm: mount.cifs Tainted: GF 3.7.0-4-generic #12-Ubuntu Dell Inc. Precision WorkStation T7400 /0RW199
[ 253.543008] RIP: 0010:[<0000000000000000>] [< (null)>] (null)
[ 253.543015] RSP: 0018:ffff88022edd3cf8 EFLAGS: 00010246
[ 253.543019] RAX: ffffffffa04ce6c0 RBX: ffff8801dcfe7780 RCX: 0000000000000004
[ 253.543024] RDX: 0000000000000000 RSI: ffff8801dcfe7780 RDI: ffff8801dcfa0340
[ 253.543029] RBP: ffff88022edd3d10 R08: 00000000000172e0 R09: ffff88023fcd6ba0
[ 253.543034] R10: ffffea0008c66a40 R11: ffffffffa04a9738 R12: ffff8801dcfe70c0
[ 253.543040] R13: ffff8801dcfe70c0 R14: ffff880231920831 R15: ffff88023192082a
[ 253.543045] FS: 00007f6cc16c2740(0000) GS:ffff88023fcc0000(0000) knlGS:0000000000000000
[ 253.543051] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 253.543056] CR2: 0000000000000000 CR3: 000000022f450000 CR4: 00000000000007e0
[ 253.543061] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 253.543066] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 253.543072] Process mount.cifs (pid: 5407, threadinfo ffff88022edd2000, task ffff880231ecdc00)
[ 253.543077] Stack:
[ 253.543080] ffffffff81195fdd ffff880231920831 0000000000000000 ffff88022edd3d38
[ 253.543089] ffffffff811961e8 01ff8801dcfe70c0 ffff880231920831 0000000000000006
[ 253.543097] ffff88022edd3d70 ffffffff81197046 0000000775c6ded2 ffff88023192082a
[ 253.543105] Call Trace:
[ 253.543113] [<ffffffff81195fdd>] ? lookup_real+0x1d/0x60
[ 253.543120] [<ffffffff811961e8>] __lookup_hash+0x38/0x50
[ 253.543125] [<ffffffff81197046>] lookup_one_len+0xd6/0x110
[ 253.543138] [<ffffffffa049600c>] cifs_do_mount+0x28c/0x4c0 [cifs]
[ 253.543146] [<ffffffff811902d3>] mount_fs+0x43/0x1b0
[ 253.543152] [<ffffffff811aa7f4>] vfs_kern_mount+0x74/0x110
[ 253.543158] [<ffffffff811ab204>] do_kern_mount+0x54/0x110
[ 253.543164] [<ffffffff811acd35>] do_mount+0x315/0x8e0
[ 253.543171] [<ffffffff811300de>] ? __get_free_pages+0xe/0x50
[ 253.543177] [<ffffffff811ac8a6>] ? copy_mount_options+0x36/0x170
[ 253.543183] [<ffffffff811ad38e>] sys_mount+0x8e/0xe0
[ 253.543190] [<ffffffff816b16dd>] system_call_fastpath+0x1a/0x1f
[ 253.543195] Code: Bad RIP value.
[ 253.543201] RIP [< (null)>] (null)
[ 253.543207] RSP <ffff88022edd3cf8>
[ 253.543210] CR2: 0000000000000000
[ 253.562605] ---[ end trace c3a88c1ab07dcc49 ]---