kernel bug "invalid opcode: 0000 [#1] SMP"

[Karl-Philipp Richter]

After boot `dmesg` reveals kernel bug

    [ 51.087327] ------------[ cut here ]------------
    [ 51.087365] kernel BUG at /var/lib/dkms/openafs/1.6.14/build/src/libafs/MODLOAD-4.2.0-29-generic-SP/osi_alloc.c:356!
    [ 51.087438] invalid opcode: 0000 [#1] SMP
    [ 51.087483] Modules linked in: openafs(POE) bbswitch(OE) bluetooth binfmt_misc pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) ax88179_178a usbnet mii uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media arc4 iwldvm mac80211 nls_iso8859_1 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul cryptd ideapad_laptop input_leds sparse_keymap joydev mac_hid serio_raw iwlwifi mei_me mei cfg80211 shpchp lpc_ich parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq bcache hid_generic usbhid hid i915 psmouse i2c_algo_bit drm_kms_helper ahci libahci drm wmi video
    [ 51.087795] CPU: 2 PID: 2343 Comm: afsd Tainted: P OE 4.2.0-29-generic #34-Ubuntu
    [ 51.087827] Hardware name: LENOVO IdeaPad U410 /Lenovo , BIOS 65CN90WW 09/25/2012
    [ 51.087859] task: ffff88022560ee00 ti: ffff8800bf720000 task.ti: ffff8800bf720000
    [ 51.087888] RIP: 0010:[<ffffffffc086dc31>] [<ffffffffc086dc31>] osi_linux_free+0xb1/0xc0 [openafs]
    [ 51.087938] RSP: 0018:ffff8800bf723cc8 EFLAGS: 00010246
    [ 51.087958] RAX: 0000000000000035 RBX: 00000000318c0300 RCX: 0000000000000000
    [ 51.087985] RDX: 0000000000000000 RSI: ffff88022f28e938 RDI: ffff88022f28e938
    [ 51.088011] RBP: ffff8800bf723ce8 R08: 000000000000000a R09: 00000000000003ff
    [ 51.088038] R10: 0000000000014ba4 R11: 00000000000003ff R12: 0000000000000000
    [ 51.088064] R13: 0000000000000002 R14: ffff8800c6392900 R15: 0000000000000000
    [ 51.088091] FS: 00007fd3d543d700(0000) GS:ffff88022f280000(0000) knlGS:0000000000000000
    [ 51.088121] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [ 51.088143] CR2: 00007f9a76ec8468 CR3: 00000000bf658000 CR4: 00000000001406e0
    [ 51.088170] Stack:
    [ 51.088178] ffff8800c6300c00 000000000fda6f55 ffff8800bf723cf8 ffff880223ce5800
    [ 51.088208] ffff8800bf723cf8 ffffffffc0824e7b ffff8800bf723d58 ffffffffc0871231
    [ 51.088237] 0000000000000008 ffff8800c76c1200 0000000000000000 000000000fda6f55
    [ 51.088267] Call Trace:
    [ 51.088287] [<ffffffffc0824e7b>] afs_osi_Free+0x2b/0x30 [openafs]
    [ 51.088320] [<ffffffffc0871231>] afs_fill_super+0x261/0x3f0 [openafs]
    [ 51.088353] [<ffffffffc0870fd0>] ? afs_alloc_inode+0x20/0x20 [openafs]
    [ 51.088381] [<ffffffff81200f5d>] mount_nodev+0x4d/0xa0
    [ 51.088407] [<ffffffffc0870df8>] afs_mount+0x18/0x20 [openafs]
    [ 51.088431] [<ffffffff81201a88>] mount_fs+0x38/0x160
    [ 51.088452] [<ffffffff811a69b5>] ? __alloc_percpu+0x15/0x20
    [ 51.088475] [<ffffffff8121d87b>] vfs_kern_mount+0x6b/0x120
    [ 51.088496] [<ffffffff81220086>] do_mount+0x246/0xd10
    [ 51.088517] [<ffffffff811a10fe>] ? strndup_user+0x4e/0xb0
    [ 51.088538] [<ffffffff811a1076>] ? memdup_user+0x46/0x80
    [ 51.088559] [<ffffffff81220e7f>] SyS_mount+0x9f/0x100
    [ 51.088580] [<ffffffff817f2cf2>] entry_SYSCALL_64_fastpath+0x16/0x75
    [ 51.088604] Code: b8 03 00 01 e8 01 30 f8 c0 48 8b 45 e8 65 48 33 04 25 28 00 00 00 75 15 48 83 c4 18 5b 5d c3 48 c7 c7 a8 f7 88 c0 e8 ba b8 f7 c0 <0f> 0b e8 78 db 80 c0 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55
    [ 51.088712] RIP [<ffffffffc086dc31>] osi_linux_free+0xb1/0xc0 [openafs]
    [ 51.088746] RSP <ffff8800bf723cc8>
    [ 51.094324] ---[ end trace 85c3af1823134528 ]---

which seems to cause `systemctl restart openafs-client.service` to not succeed until it times out and prevents shutdown where `systemd` hangs at `Reached target shutdown`.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: openafs-client 1.6.14-1 [modified: lib/systemd/system/openafs-client.service]
ProcVersionSignature: Ubuntu 4.2.0-29.34-generic 4.2.8-ckt3
Uname: Linux 4.2.0-29-generic x86_64
NonfreeKernelModules: openafs
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Feb 13 13:57:06 2016
InstallationDate: Installed on 2013-10-17 (848 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
SourcePackage: openafs
UpgradeStatus: Upgraded to wily on 2015-11-19 (85 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Carlos Mendes (carlos-d-mendes)]

After boot dmesg reveals:

[ 68.179736] ------------[ cut here ]------------
[ 68.180543] kernel BUG at /var/lib/dkms/openafs/1.6.16/build/src/libafs/MODLOAD-3.19.0-49-generic-SP/osi_alloc.c:356!
[ 68.181259] invalid opcode: 0000 [#1] SMP
[ 68.181946] Modules linked in: openafs(POE) intel_rapl iosf_mbi x86_pkg_temp_thermal eeepc_wmi intel_powerclamp asus_wmi sparse_keymap coretemp snd_hda_codec_realtek snd_hda_codec_generic kvm crct10dif_pclmul i915 crc32_pclmul snd_hda_intel drm_kms_helper drm snd_hda_controller snd_hda_codec i2c_algo_bit mei_me snd_hwdep snd_pcm serio_raw snd_timer snd cryptd wmi soundcore mei lpc_ich video mac_hid ie31200_edac edac_core shpchp lp parport hid_generic usbhid hid usb_storage raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid1 raid0 multipath psmouse ahci r8169 libahci mii linear
[ 68.184475] CPU: 2 PID: 1070 Comm: afsd Tainted: P OE 3.19.0-49-generic #55~14.04.1-Ubuntu
[ 68.185315] Hardware name: System manufacturer System Product Name/P8B75-M LX PLUS, BIOS 0410 08/08/2012
[ 68.186170] task: ffff880061b89d70 ti: ffff88006192c000 task.ti: ffff88006192c000
[ 68.187032] RIP: 0010:[<ffffffffc06814f5>] [<ffffffffc06814f5>] osi_linux_free+0x95/0xa0 [openafs]
[ 68.187928] RSP: 0018:ffff88006192fd38 EFLAGS: 00010296
[ 68.188808] RAX: 0000000000000035 RBX: 0000000000000000 RCX: 0000000000000000
[ 68.189691] RDX: 0000000000000001 RSI: ffff880100b0e3b8 RDI: ffff880100b0e3b8
[ 68.190581] RBP: ffff88006192fd58 R08: 000000000000000a R09: 0000000000000000
[ 68.191477] R10: 00000000000003d2 R11: ffff88006192f9fe R12: 0000000000000002
[ 68.192379] R13: ffff880061bfb840 R14: 0000000000000000 R15: 0000000000000000
[ 68.193286] FS: 00007f4f0ba78740(0000) GS:ffff880100b00000(0000) knlGS:0000000000000000
[ 68.194217] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 68.195151] CR2: 0000559c5262d230 CR3: 0000000063a05000 CR4: 00000000001407e0
[ 68.196098] Stack:
[ 68.197051] ffff88006192fd68 ffff88006361f400 0000000000000002 ffff88006058b800
[ 68.198025] ffff88006192fd68 ffffffffc063756b ffff88006192fda8 ffffffffc0684c7d
[ 68.199009] ffff880063648c00 ffff880060142140 ffff88006058b800 0000000000000000
[ 68.200002] Call Trace:
[ 68.200995] [<ffffffffc063756b>] afs_osi_Free+0x2b/0x30 [openafs]
[ 68.201999] [<ffffffffc0684c7d>] afs_fill_super+0x2cd/0x430 [openafs]
[ 68.203021] [<ffffffffc06849b0>] ? afs_alloc_inode+0x20/0x20 [openafs]
[ 68.204034] [<ffffffff811efa2d>] mount_nodev+0x4d/0xb0
[ 68.205052] [<ffffffffc0684738>] afs_mount+0x18/0x20 [openafs]
[ 68.206076] [<ffffffff811f0599>] mount_fs+0x39/0x1b0
[ 68.207107] [<ffffffff81196de5>] ? __alloc_percpu+0x15/0x20
[ 68.208146] [<ffffffff8120ba5b>] vfs_kern_mount+0x6b/0x120
[ 68.209182] [<ffffffff8120e804>] do_mount+0x224/0xce0
[ 68.210225] [<ffffffff8120f5bb>] SyS_mount+0x8b/0xe0
[ 68.211268] [<ffffffff817b7c0d>] system_call_fastpath+0x16/0x1b
[ 68.212315] Code: ed f8 ff 48 c7 c7 20 8b 6a c0 83 2d 4d c6 03 00 01 e8 60 44 13 c1 48 83 c4 18 5b 5d c3 48 c7 c7 80 36 6a c0 31 c0 e8 cc 92 12 c1 <0f> 0b 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 c7 ...

[Karl-Philipp Richter (krichter722)]

With Linux 4.1.17-wily from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D:

    [ 58.996682] ------------[ cut here ]------------
    [ 58.997318] kernel BUG at /var/lib/dkms/openafs/1.6.14/build/src/libafs/MODLOAD-4.1.17-040117-generic-SP/osi_alloc.c:356!
    [ 58.997920] invalid opcode: 0000 [#1] SMP
    [ 58.998523] Modules linked in: openafs(POE) bbswitch(OE) binfmt_misc bluetooth pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) nls_iso8859_1 ax88179_178a usbnet mii uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common arc4 videodev media iwldvm intel_rapl iosf_mbi x86_pkg_temp_thermal mac80211 intel_powerclamp coretemp crct10dif_pclmul kvm_intel crc32_pclmul kvm iwlwifi ideapad_laptop joydev lpc_ich cryptd mei_me cfg80211 mei serio_raw sparse_keymap mac_hid shpchp parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq bcache hid_generic usbhid hid i915 i2c_algo_bit drm_kms_helper psmouse ahci drm libahci wmi video
    [ 59.001487] CPU: 0 PID: 2360 Comm: afsd Tainted: P OE 4.1.17-040117-generic #201601311534
    [ 59.002297] Hardware name: LENOVO IdeaPad U410 /Lenovo , BIOS 65CN90WW 09/25/2012
    [ 59.003118] task: ffff880223b98a10 ti: ffff880215f70000 task.ti: ffff880215f70000
    [ 59.003951] RIP: 0010:[<ffffffffc0864af5>] [<ffffffffc0864af5>] osi_linux_free+0x95/0xa0 [openafs]
    [ 59.004827] RSP: 0018:ffff880215f73ce8 EFLAGS: 00010292
    [ 59.005684] RAX: 0000000000000035 RBX: 0000000031cfce00 RCX: 0000000000000035
    [ 59.006546] RDX: ffff88022f211fd8 RSI: ffff88022f20e738 RDI: ffff88022f20e738
    [ 59.007406] RBP: ffff880215f73d08 R08: 000000000000000a R09: 0000000000000096
    [ 59.008267] R10: 0000000000014258 R11: 00000000000003e7 R12: 0000000000000000
    [ 59.009128] R13: 0000000000000002 R14: ffff880223a8f840 R15: 0000000000000000
    [ 59.009978] FS: 00007f1807f00700(0000) GS:ffff88022f200000(0000) knlGS:0000000000000000
    [ 59.010836] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [ 59.011690] CR2: 00007fa3dba66000 CR3: 0000000214066000 CR4: 00000000001406f0
    [ 59.012554] Stack:
    [ 59.013407] ffff880215f73cf8 ffff8800c73f3800 ffff880215f73d18 ffff8800c5bca800
    [ 59.014281] ffff880215f73d18 ffffffffc081afab ffff880215f73d68 ffffffffc0868167
    [ 59.015158] ffff8800c664a400 ffff8800c5bcaad8 ffff880215f73d48 ffff8800c5bca800
    [ 59.016041] Call Trace:
    [ 59.016935] [<ffffffffc081afab>] afs_osi_Free+0x2b/0x30 [openafs]
    [ 59.017829] [<ffffffffc0868167>] afs_fill_super+0x247/0x400 [openafs]
    [ 59.018728] [<ffffffffc0867f20>] ? afs_alloc_inode+0x20/0x20 [openafs]
    [ 59.019617] [<ffffffff8120451d>] mount_nodev+0x4d/0xa0
    [ 59.020520] [<ffffffffc0867d38>] afs_mount+0x18/0x20 [openafs]
    [ 59.021416] [<ffffffff812050b8>] mount_fs+0x38/0x190
    [ 59.022314] [<ffffffff811a94f5>] ? __alloc_percpu+0x15/0x20
    [ 59.023222] [<ffffffff8122225b>] vfs_kern_mount+0x6b/0x120
    [ 59.024135] [<ffffffff81224be4>] do_mount+0x224/0xd30
    [ 59.025050] [<ffffffff81225a40>] SyS_mount+0x90/0xe0
    [ 59.025953] [<ffffffff817eb932>] system_call_fastpath+0x16/0...

[David Eck (eck-l)]

On ubuntu 16.04 server

I have the same kernel bug, when trying to start openafs-client on
a server, with openafs-fileserver running on the same server. Output
from dmsg is attached.

[Karl-Philipp Richter (krichter722)]

Are you using Linux >= 4.4.0? This was fixed after upgrading to 16.04 as indicated in the upstream bug. Consider filing a separate bug for 16.04.

[David Eck (eck-l)]

I am using 16.04 with kernel 4.4.0.
I will file a separate bug report for 16.04.

—David Eck

> Are you using Linux >= 4.4.0? This was fixed after upgrading to 16.04 as
> indicated in the upstream bug. Consider filing a separate bug for 16.04.