Heavy Bug Encountered on NFSv4 Server

Thomas Hoppe raphead at gmx.net
Fri May 25 17:30:23 EDT 2007 

Hi,

I have a filer with the following specs:

Gentoo Linux,

Linux dbserver1 2.6.20-gentoo-r6n-fuse #10 SMP Sun May 6 02:48:20 CEST 
2007 i686 Intel(R) Pentium(R) III CPU - S         1400MHz GenuineIntel 
GNU/Linux

[1] i686-pc-linux-gnu-4.1.2 *

dbserver1 ~ # /lib/libc.so.6
GNU C Library stable release version 2.5, by Roland McGrath et al.
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.1.1 (Gentoo 4.1.1-r3).
Compiled on a Linux 2.6.17 system on 2007-05-09.
Available extensions:
        C stubs add-on version 2.1.2
        crypt add-on version 2.1 by Michael Glad and others
        Gentoo patchset 1.5
        GNU Libidn by Simon Josefsson
        GNU libio by Per Bothner
        NIS(YP)/NIS+ NSS modules 0.19 by Thorsten Kukuk
        Native POSIX Threads Library by Ulrich Drepper et al
        Support for some architectures added on, not maintained in glibc 
core.
        BIND-8.2.3-T5B
Thread-local storage support included.
For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.

-----------------------------------------------------------------------

 From time to time I get the following error logged:
After an outage of the NFSD, I have to reboot the machine.

May 24 13:40:42 dbserver1 ------------[ cut here ]------------
May 24 13:40:42 dbserver1 kernel BUG at fs/locks.c:172!
May 24 13:40:42 dbserver1 invalid opcode: 0000 [#1]
May 24 13:40:42 dbserver1 SMP
May 24 13:40:42 dbserver1 Modules linked in: nfnetlink generic
May 24 13:40:42 dbserver1 CPU:    0
May 24 13:40:42 dbserver1 EIP:    0060:[<c01706a7>]    Not tainted VLI
May 24 13:40:42 dbserver1 EFLAGS: 00010287   (2.6.20-gentoo-r6n-fuse #10)
May 24 13:40:42 dbserver1 EIP is at locks_free_lock+0x37/0x40
May 24 13:40:42 dbserver1 eax: cbed1ba8   ebx: cbed1b9c   ecx: 
c2bda050   edx: c2bda050
May 24 13:40:42 dbserver1 esi: d2dbbe3c   edi: 00000000   ebp: 
00000000   esp: f5b03c8c
May 24 13:40:42 dbserver1 ds: 007b   es: 007b   ss: 0068
May 24 13:40:42 dbserver1 Process nfsd (pid: 5340, ti=f5b02000 
task=c2bda050 task.ti=f5b02000)
May 24 13:40:42 dbserver1 Stack: 00000000 c01719f1 00000800 f48f58d4 
00000000 cbed1b9c 00000000 c01abbd0
May 24 13:40:42 dbserver1 c2adff5c f78dfc00 c01abbd0 c0174e70 00000004 
cd210000 f48dd794 00000000
May 24 13:40:42 dbserver1 c0222d25 00000044 ce0ab518 22270000 00000004 
00000000 f556e1e0 c02382c4
May 24 13:40:42 dbserver1 Call Trace:
May 24 13:40:42 dbserver1 [<c01719f1>] __break_lease+0x81/0x320
May 24 13:40:42 dbserver1 [<c01abbd0>] reiserfs_find_actor+0x0/0x20
May 24 13:40:42 dbserver1 [<c01abbd0>] reiserfs_find_actor+0x0/0x20
May 24 13:40:42 dbserver1 [<c0174e70>] ifind+0x50/0xa0
May 24 13:40:42 dbserver1 [<c0222d25>] nfsd_open+0x95/0x180
May 24 13:40:42 dbserver1 [<c02382c4>] nfsd4_process_open2+0x8a4/0x970
May 24 13:40:42 dbserver1 [<c0174bb5>] iput+0x35/0x70
May 24 13:40:42 dbserver1 [<c0173e22>] d_alloc_anon+0x22/0xf0
May 24 13:40:42 dbserver1 [<c0169178>] generic_permission+0x68/0x120
May 24 13:40:42 dbserver1 [<c0128df2>] set_current_groups+0x242/0x250
May 24 13:40:42 dbserver1 [<c0169178>] generic_permission+0x68/0x120
May 24 13:40:42 dbserver1 [<c01c7520>] reiserfs_permission+0x0/0x30
May 24 13:40:42 dbserver1 [<c0169367>] permission+0x137/0x140
May 24 13:40:42 dbserver1 [<c02220e7>] nfsd_permission+0x87/0x110
May 24 13:40:42 dbserver1 [<c022170a>] fh_verify+0x9a/0x5d0
May 24 13:40:42 dbserver1 [<c01737a0>] dput+0xc0/0x140
May 24 13:40:42 dbserver1 [<c022535e>] nfsd_lookup+0x13e/0x460
May 24 13:40:42 dbserver1 [<c01737a0>] dput+0xc0/0x140
May 24 13:40:42 dbserver1 [<c022ea54>] nfsd4_open+0x284/0x580
May 24 13:40:42 dbserver1 [<c022e7d0>] nfsd4_open+0x0/0x580
May 24 13:40:42 dbserver1 [<c022e763>] nfsd4_proc_compound+0x233/0x2a0
May 24 13:40:42 dbserver1 [<c02328b0>] nfs4svc_decode_compoundargs+0x0/0x60
May 24 13:40:42 dbserver1 [<c021e64c>] nfsd_dispatch+0x8c/0x1e0
May 24 13:40:42 dbserver1 [<c049204f>] svc_process+0x3cf/0x730
May 24 13:40:42 dbserver1 [<c0494d20>] svc_recv+0x220/0x410
May 24 13:40:42 dbserver1 [<c021ecd8>] nfsd+0x178/0x290
May 24 13:40:42 dbserver1 [<c021eb60>] nfsd+0x0/0x290
May 24 13:40:42 dbserver1 [<c0103bb7>] kernel_thread_helper+0x7/0x10
May 24 13:40:42 dbserver1 =======================
May 24 13:40:42 dbserver1 Code: 43 0c 3b 43 0c 75 24 8d 43 04 3b 43 04 
75 18 89 d8 e8 8e f3 ff ff a1 08 5a 5c c0 89 da 5b e9 b1 d9 fe ff 0f 0b 
eb fe 0f 0b eb fe <0f> 0b eb fe 90 8d 74 26 00 53 83 ec 08 8b 18 8b 13 
89 10 8d 43
May 24 13:40:42 dbserver1 EIP: [<c01706a7>] locks_free_lock+0x37/0x40 
SS:ESP 0068:f5b03c8c



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