Am 16.11.2016 um 15:40 schrieb Kent Overstreet:
>> A bcachefs or an OpenAFS bug? I only experience this with the OpenAFS
>> > cache on a one-partition bcachefs mount.
> Where are you getting __bch_btree_iter_unlock() from?
From the right backtrace
[ 65.943980] BUG: unable to handle kernel NULL pointer dereference
at (null)
[ 65.944607] IP: [<ffffffffc0dc9d97>] osi_get_fh+0x37/0x100 [openafs]
[ 65.945234] PGD 0
[ 65.945857] Oops: 0000 [#1] SMP
[ 65.946451] Modules linked in: snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec
snd_hwdep snd_hda_core snd_pcm snd_timer snd soundcore openafs(POE)
iptable_filter bridge stp llc pci_stub vboxpci(OE) vboxnetadp(OE)
vboxnetflt(OE) bnep vboxdrv(OE) binfmt_misc rtsx_usb_ms memstick
intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp nls_iso8859_1
kvm_intel kvm arc4 irqbypass crct10dif_pclmul crc32_pclmul iwldvm
ghash_clmulni_intel aesni_intel aes_x86_64 glue_helper lrw ablk_helper
cryptd intel_cstate mac80211 cdc_ether usbnet r8152 uvcvideo btusb
intel_rapl_perf btrtl btbcm videobuf2_vmalloc videobuf2_memops btintel
videobuf2_v4l2 videobuf2_core bluetooth videodev iwlwifi media
hid_multitouch cfg80211 joydev input_leds serio_raw ideapad_laptop
sparse_keymap
[ 65.949378] wmi mei_me mei mac_hid lpc_ich shpchp sunrpc coda
parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs xor
raid6_pq rtsx_usb_sdmmc rtsx_usb hid_generic usbhid hid i915 psmouse
r8169 i2c_algo_bit mii drm_kms_helper syscopyarea sysfillrect sysimgblt
fb_sys_fops drm video fjes ahci libahci
[ 65.951897] CPU: 7 PID: 15519 Comm: afsd Tainted: P W OE
5.8.0+ #4
[ 65.952709] Hardware name: LENOVO 20221/INVALID, BIOS
71CN51WW(V1.21) 07/12/2013
[ 65.953520] task: ffff974ca389aac0 task.stack: ffff974ca9c8c000
[ 65.954347] RIP: 0010:[<ffffffffc0dc9d97>] [<ffffffffc0dc9d97>]
osi_get_fh+0x37/0x100 [openafs]
[ 65.955180] RSP: 0018:ffff974ca9c8fc38 EFLAGS: 00010286
[ 65.956006] RAX: 0000000000000000 RBX: ffff974ca389aac0 RCX:
0000000000000000
[ 65.956844] RDX: 000000000000000a RSI: ffffffffc0df29a0 RDI:
ffff974c57177540
[ 65.957691] RBP: ffff974ca9c8fc48 R08: 000000000001cb00 R09:
ffffffff8f43dc24
[ 65.958538] R10: ffff974cbf3dcb00 R11: ffffea000f615600 R12:
0000565285b7a680
[ 65.959398] R13: ffff974ca6def400 R14: 0000000000000007 R15:
0000000000000000
[ 65.960258] FS: 00007f2a06697700(0000) GS:ffff974cbf3c0000(0000)
knlGS:0000000000000000
[ 65.961120] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 65.962019] CR2: 0000000000000000 CR3: 00000003eab58000 CR4:
00000000001406e0
[ 65.962925] Stack:
[ 65.963794] 0000000aa6def400 00000000c0c2219a ffff974ca9c8fc70
ffffffffc0dca22e
[ 65.964692] 00000000a44cf900 ffff974c57177540 00000000c0c2219a
ffff974ca9c8fcb0
[ 65.965587] ffffffffc0d79727 0000000000000000 ffff974ca9c8fc98
ffffffffc0d800a0
[ 65.966492] Call Trace:
[ 65.967393] [<ffffffffc0dca22e>] osi_InitCacheInfo+0x5e/0xa0
[openafs]
[ 65.968310] [<ffffffffc0d79727>] afs_InitCacheInfo+0x37/0x130
[openafs]
[ 65.969224] [<ffffffffc0d800a0>] ?
afs_osi_Alloc.part.0+0x20/0x30 [openafs]
[ 65.970161] [<ffffffffc0dd693d>] afs_syscall_call+0xe0d/0x1be0
[openafs]
[ 65.971082] [<ffffffff8f438154>] ? terminate_walk+0x64/0xd0
[ 65.971980] [<ffffffff8f43c8e9>] ? path_openat+0x419/0x15e0
[ 65.972874] [<ffffffff8f8d04ea>] ? __bch_btree_iter_unlock+0x6a/0xb0
[ 65.973777] [<ffffffffc0d86629>] afs_syscall+0x319/0x5b0 [openafs]
[ 65.974671] [<ffffffff8f4428a0>] ? iterate_dir+0x190/0x190
[ 65.975565] [<ffffffffc0dcc7e6>] afs_unlocked_ioctl+0x76/0xd0
[openafs]
[ 65.976457] [<ffffffff8f4a0988>] proc_reg_unlocked_ioctl+0x48/0x70
[ 65.977350] [<ffffffff8f44212f>] do_vfs_ioctl+0x9f/0x5f0
[ 65.978273] [<ffffffff8f43dc24>] ? putname+0x54/0x60
[ 65.979167] [<ffffffff8f4426f9>] SyS_ioctl+0x79/0x90
[ 65.980090] [<ffffffff8faae5b6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[ 65.980970] Code: 89 e5 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48
89 45 f8 31 c0 8b 05 f9 5c 02 00 85 c0 0f 4e c2 89 45 f4 48 8b 47 68 48
8b 40 48 <48> 8b 00 48 85 c0 74 45 31 c9 48 8b 7f 30 48 8d 55 f4 ff d0 3d
[ 65.983011] RIP [<ffffffffc0dc9d97>] osi_get_fh+0x37/0x100 [openafs]
[ 65.983954] RSP <ffff974ca9c8fc38>
[ 65.984873] CR2: 0000000000000000
[ 65.985816] ---[ end trace c635bc3382137541 ]---
Sorry for the confusion.
-Kalle
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