** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Tags added: kernel-da-key
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1218863 Title: Kernel Oops unable to handle kernel NULL pointer dereference at 0000000000000ffc Status in “linux” package in Ubuntu: Incomplete Bug description: I'm experiencing infrequent kernel oops situations (I think that's the correct term) running 13.04 with kernel Ubuntu 3.8.0-29.42-generic 3.8.13.5. This is a days-old machine with an up-to-date install of 13.04. I'm not able to make this happen at will and as such cannot narrow it down to any particular application or process. Below is the most recent relevant log entries from /var/log/syslog. I'm happy to provide further information but at present I don't understand the situation clearly enough to know what might be useful or relevant. --- Aug 30 11:50:49 swombat kernel: [67837.896357] BUG: unable to handle kernel NULL pointer dereference at 0000000000000ffc Aug 30 11:50:49 swombat kernel: [67837.896381] IP: [<ffffffff811ac0f0>] __d_lookup_rcu+0x80/0x160 Aug 30 11:50:49 swombat kernel: [67837.896400] PGD 7d9da7067 PUD 7d9f76067 PMD 0 Aug 30 11:50:49 swombat kernel: [67837.896413] Oops: 0000 [#2] SMP Aug 30 11:50:49 swombat kernel: [67837.896423] Modules linked in: snd_hda_codec_realtek snd_hda_codec_hdmi hid_generic usbhid hid rfcomm bnep bluetooth coretemp kvm_intel kvm ghash_clmulni_intel(F) aesni_intel(F) aes_x86_64(F) xts(F) lrw(F) gf128mul(F) ablk_helper(F) cryptd(F) arc4(F) ppdev(F) ath9k ath9k_common ath9k_hw ath snd_seq_midi(F) snd_seq_midi_event(F) mac80211 snd_rawmidi(F) snd_hda_intel cfg80211 snd_hda_codec psmouse(F) snd_hwdep(F) microcode(F) i915 serio_raw(F) snd_pcm(F) lpc_ich snd_seq(F) snd_seq_device(F) video(F) snd_page_alloc(F) drm_kms_helper parport_pc(F) snd_timer(F) mac_hid drm nls_iso8859_1(F) snd(F) i2c_algo_bit soundcore(F) mei lp(F) parport(F) ahci(F) r8169 libahci(F) Aug 30 11:50:49 swombat kernel: [67837.896598] CPU 1 Aug 30 11:50:49 swombat kernel: [67837.896605] Pid: 27640, comm: java Tainted: GF D 3.8.0-29-generic #42-Ubuntu Gigabyte Technology Co., Ltd. H87-HD3/H87-HD3 Aug 30 11:50:49 swombat kernel: [67837.896631] RIP: 0010:[<ffffffff811ac0f0>] [<ffffffff811ac0f0>] __d_lookup_rcu+0x80/0x160 Aug 30 11:50:49 swombat kernel: [67837.896651] RSP: 0018:ffff8806e387dc50 EFLAGS: 00010206 Aug 30 11:50:49 swombat kernel: [67837.896664] RAX: 0000000000000000 RBX: 0000000000001000 RCX: 0000000000000016 Aug 30 11:50:49 swombat kernel: [67837.896679] RDX: ffffc90005101000 RSI: ffff8806e387dde8 RDI: ffff88075a7690c0 Aug 30 11:50:49 swombat kernel: [67837.896695] RBP: ffff8806e387dc98 R08: 8080808080808080 R09: ffff8806e387dde8 Aug 30 11:50:49 swombat kernel: [67837.896711] R10: ffff88080c7ca077 R11: 000000000000000a R12: ffff88075a7690c0 Aug 30 11:50:49 swombat kernel: [67837.896727] R13: 0000000000000ff8 R14: 0000000a44cc80ce R15: ffff8806e387dcc4 Aug 30 11:50:49 swombat kernel: [67837.896743] FS: 00007f0f679ae700(0000) GS:ffff88083e240000(0000) knlGS:0000000000000000 Aug 30 11:50:49 swombat kernel: [67837.896761] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Aug 30 11:50:49 swombat kernel: [67837.897691] CR2: 0000000000000ffc CR3: 00000007d9e2f000 CR4: 00000000001407e0 Aug 30 11:50:49 swombat kernel: [67837.898619] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Aug 30 11:50:49 swombat kernel: [67837.899542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Aug 30 11:50:49 swombat kernel: [67837.900463] Process java (pid: 27640, threadinfo ffff8806e387c000, task ffff88080dd50000) Aug 30 11:50:49 swombat kernel: [67837.901366] Stack: Aug 30 11:50:49 swombat kernel: [67837.902234] ffff8806e387dca0 ffffffff81233540 ffff8806e387dc80 ffff88075a7d1d30 Aug 30 11:50:49 swombat kernel: [67837.903095] ffff88075a7690c0 ffff8806e387dd38 0000000000000051 ffff8806e387ddd8 Aug 30 11:50:49 swombat kernel: [67837.903929] ffff8806e387dd40 ffff8806e387dcf0 ffffffff811a0564 ffff88080e0e5120 Aug 30 11:50:49 swombat kernel: [67837.904763] Call Trace: Aug 30 11:50:49 swombat kernel: [67837.905579] [<ffffffff81233540>] ? ext4_map_blocks+0x200/0x2a0 Aug 30 11:50:49 swombat kernel: [67837.906389] [<ffffffff811a0564>] lookup_fast+0x44/0x2e0 Aug 30 11:50:49 swombat kernel: [67837.907193] [<ffffffff8119fa36>] ? complete_walk+0xa6/0x130 Aug 30 11:50:49 swombat kernel: [67837.907992] [<ffffffff811a27cc>] path_lookupat+0x11c/0x740 Aug 30 11:50:49 swombat kernel: [67837.908788] [<ffffffff8123c148>] ? htree_dirblock_to_tree+0x148/0x200 Aug 30 11:50:49 swombat kernel: [67837.909587] [<ffffffff8117d431>] ? kmem_cache_alloc+0x31/0x130 Aug 30 11:50:49 swombat kernel: [67837.910381] [<ffffffff811a2e24>] filename_lookup+0x34/0xc0 Aug 30 11:50:49 swombat kernel: [67837.911171] [<ffffffff811a3efc>] user_path_at_empty+0x8c/0x100 Aug 30 11:50:49 swombat kernel: [67837.911956] [<ffffffff81309174>] ? apparmor_inode_getattr+0x54/0x60 Aug 30 11:50:49 swombat kernel: [67837.912737] [<ffffffff81085e8a>] ? lg_local_unlock+0x1a/0x20 Aug 30 11:50:49 swombat kernel: [67837.913515] [<ffffffff8119923a>] ? cp_new_stat+0x11a/0x130 Aug 30 11:50:49 swombat kernel: [67837.914460] [<ffffffff811a3f81>] user_path_at+0x11/0x20 Aug 30 11:50:49 swombat kernel: [67837.915242] [<ffffffff811994e2>] vfs_fstatat+0x52/0xb0 Aug 30 11:50:49 swombat kernel: [67837.916014] [<ffffffff8119957b>] vfs_stat+0x1b/0x20 Aug 30 11:50:49 swombat kernel: [67837.916775] [<ffffffff811997ba>] sys_newstat+0x1a/0x40 Aug 30 11:50:49 swombat kernel: [67837.917529] [<ffffffff816d561d>] system_call_fastpath+0x1a/0x1f Aug 30 11:50:49 swombat kernel: [67837.918280] Code: 83 e3 fe 0f 84 b2 00 00 00 4d 89 f3 49 c1 eb 20 eb 15 66 0f 1f 84 00 00 00 00 00 48 8b 1b 48 85 db 0f 84 94 00 00 00 4c 8d 6b f8 <8b> 43 fc 4c 39 63 10 75 e7 48 83 7b 08 00 74 e0 89 c1 83 e1 fe Aug 30 11:50:49 swombat kernel: [67837.919906] RIP [<ffffffff811ac0f0>] __d_lookup_rcu+0x80/0x160 Aug 30 11:50:49 swombat kernel: [67837.920705] RSP <ffff8806e387dc50> Aug 30 11:50:49 swombat kernel: [67837.921499] CR2: 0000000000000ffc Aug 30 11:50:49 swombat kernel: [67837.939480] ---[ end trace 3068c08641379cf1 ]--- ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: linux-image-3.8.0-29-generic 3.8.0-29.42 ProcVersionSignature: Ubuntu 3.8.0-29.42-generic 3.8.13.5 Uname: Linux 3.8.0-29-generic x86_64 ApportVersion: 2.9.2-0ubuntu8.3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: jon 2276 F.... pulseaudio /dev/snd/controlC0: jon 2276 F.... pulseaudio CRDA: country AU: (2402 - 2482 @ 40), (N/A, 20) (5170 - 5250 @ 40), (3, 23) (5250 - 5330 @ 40), (3, 23), DFS (5735 - 5835 @ 40), (3, 30) Date: Fri Aug 30 12:33:31 2013 HibernationDevice: RESUME=UUID=c260cba0-05d0-4330-9a20-3c8afb9485c4 InstallationDate: Installed on 2013-08-23 (7 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MachineType: Gigabyte Technology Co., Ltd. H87-HD3 MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-29-generic root=UUID=732cb997-6913-43ea-a27b-483e7b020cf6 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.8.0-29-generic N/A linux-backports-modules-3.8.0-29-generic N/A linux-firmware 1.106 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/03/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F5 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: H87-HD3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF5:bd08/03/2013:svnGigabyteTechnologyCo.,Ltd.:pnH87-HD3:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnH87-HD3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: H87-HD3 dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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