[Bug 97105] samba causes nfsv4 kernel module bug

[Scott Henson]

Public bug reported:

I'm running dapper.  We are exporting nfsv4 filesystems via samba and we
get the following crash.  We just switched to nfsv4 from nfsv3.  Nfsv3
worked (sorta, it had its own problems, but they did not include kernel
crashes).

Mar 27 15:17:01 robinson kernel: [42950285.520000]  ------------[ cut here ]------------
Mar 27 15:17:01 robinson kernel: [42950319.760000] kernel BUG at fs/nfs/nfs4proc.c:2749!
Mar 27 15:17:01 robinson kernel: [42950319.760000] invalid operand: 0000 [#9]
Mar 27 15:17:01 robinson kernel: [42950319.760000] SMP
Mar 27 15:17:01 robinson kernel: [42950319.760000] Modules linked in: nfs lockd sunrpc autofs4 video tc1100_wmi sony_acpi pcc_acpi hotkey dev_acpi container button acpi_sbs batter
y ac i2c_acpi_ec i2c_core iptable_raw iptable_mangle ipt_ULOG ipt_TTL ipt_ttl ipt_TOS ipt_tos ipt_TCPMSS ipt_tcpmss ipt_state ipt_sctp ipt_SAME ipt_REJECT ipt_REDIRECT ipt_recent
ipt_realm ipt_pkttype ipt_physdev ipt_owner ipt_NOTRACK ipt_NETMAP ipt_multiport ipt_MASQUERADE ipt_MARK ipt_mark ipt_mac ipt_LOG ipt_limit ipt_length ipt_iprange ipt_helper ipt_h
ashlimit ipt_esp ipt_ECN ipt_ecn ipt_DSCP ipt_dscp ipt_conntrack ipt_CONNMARK ipt_connmark ipt_comment ipt_CLUSTERIP ipt_CLASSIFY ipt_ah ipt_addrtype ip_nat_irc ip_nat_tftp ip_nat
_ftp iptable_nat ip_nat ip_conntrack_irc ip_conntrack_tftp ip_conntrack_ftp ip_conntrack nfnetlink iptable_filter ip_tables dm_mod ipv6 af_packet md_mod lp parport_pc parport e100
0 e100 mii pcspkr tsdev analog gameport floppy intel_agp psmouse serio_raw agpgart hw_random shpchp pci_hotplug evdev ext3 jbd ide_ge
Mar 27 15:17:01 robinson kernel: eric ehci_hcd uhci_hcd usbcore ide_cd cdrom ide_disk piix generic pdc202xx_new thermal processor fan capability commoncap vga16fb vgastate fbcon t
ileblit font bitblit softcursor
Mar 27 15:17:01 robinson kernel: [42950319.760000] CPU:    0
Mar 27 15:17:01 robinson kernel: [42950319.760000] EIP:    0060:[pg0+545621355/1069167616]    Not tainted VLI
Mar 27 15:17:01 robinson kernel: [42950319.760000] EFLAGS: 00210212   (2.6.15-28-server)
Mar 27 15:17:01 robinson kernel: [42950319.760000] EIP is at _nfs4_do_setlk+0xab/0x310 [nfs]
Mar 27 15:17:01 robinson kernel: [42950319.760000] eax: 00000060   ebx: dd2ff2c0   ecx: 00000000   edx: dc1769c0
Mar 27 15:17:01 robinson kernel: [42950319.760000] esi: dc19c908   edi: dc08bebc   ebp: dc678f40   esp: dc08be50
Mar 27 15:17:01 robinson kernel: [42950319.760000] ds: 007b   es: 007b   ss: 0068
Mar 27 15:17:01 robinson kernel: [42950319.760000] Process smbd (pid: 6113, threadinfo=dc08a000 task=dc63b030)
Mar 27 15:17:01 robinson kernel: [42950319.760000] Stack: 00000000 0000000e dc08be60 dc1769e4 dd2ff2c0 dc08bed4 00000000 df577a00
Mar 27 15:17:01 robinson kernel: [42950319.760000]        dc1769c0 c014f36c dd2ff488 dc08bedc 00000000 0000000e 00000001 00200282
Mar 27 15:17:01 robinson kernel: [42950319.760000]        00000000 dd2ff3d8 00000000 dc1769e4 00000000 dc678f68 11000000 785d0946
Mar 27 15:17:01 robinson kernel: [42950319.760000] Call Trace:
Mar 27 15:17:01 robinson kernel: [42950319.760000]  [find_get_pages_tag+76/176] find_get_pages_tag+0x4c/0xb0
Mar 27 15:17:01 robinson kernel: [42950319.760000]  [pg0+545662241/1069167616] nfs4_get_lock_state+0x81/0x90 [nfs]
Mar 27 15:17:01 robinson kernel: [42950319.760000]  [pg0+545622462/1069167616] _nfs4_proc_setlk+0xbe/0x100 [nfs]
Mar 27 15:17:01 robinson kernel: [42950319.760000]  [pg0+545622592/1069167616] nfs4_proc_setlk+0x40/0x70 [nfs]
Mar 27 15:17:01 robinson kernel: [42950319.760000]  [pg0+545622790/1069167616] nfs4_proc_lock+0x96/0x120 [nfs]
Mar 27 15:17:01 robinson kernel: [42950319.760000]  [pg0+545531775/1069167616] do_setlk+0xbf/0x120 [nfs]
Mar 27 15:17:01 robinson kernel: [42950319.760000]  [sys_flock+273/512] sys_flock+0x111/0x200
Mar 27 15:17:01 robinson kernel: [42950319.760000]  [sysenter_past_esp+84/117] sysenter_past_esp+0x54/0x75
Mar 27 15:17:01 robinson kernel: [42950319.760000] Code: 24 10 89 44 24 60 8b 84 24 b8 00 00 00 89 44 24 64 0f b6 46 2d 3c 01 0f 84 29 02 00 00 0f 82 ad 01 00 00 3c 02 0f 84 2f 02
 00 00 <0f> 0b bd 0a 48 55 cc e0 31 ed 8d 74 26 00 8d bc 27 00 00 00 00

** Affects: linux-source-2.6.15 (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

-- 
samba causes nfsv4 kernel module bug
https://launchpad.net/bugs/97105