Hi,
same problem with unionfs-1.2 :
#########################################################################
# dmesg
...
unionfs: module not supported by Novell, setting U taint flag.
Registering unionfs 1.2
unionfs: debugging is not enabled
...
XFS mounting filesystem sda4
Ending clean XFS mount for filesystem: sda4
Unable to handle kernel NULL pointer dereference at virtual address 0000009c
printing eip:
f8869759
*pde = 00000000
Oops: 0000 [#1]
SMP
last sysfs file: /block/sda/size
Modules linked in: xfs_quota xfs reiserfs ipt_REJECT xt_tcpudp iptable_mangle
iptable_nat ip_nat ip_conntrack nfnetli
nk iptable_filter ip_tables x_tables joydev rpcsec_gss_krb5 auth_rpcgss nfsd
exportfs snd_intel8x0 snd_ac97_codec snd
_ac97_bus snd_pcm snd_timer snd soundcore snd_page_alloc st sr_mod usb_storage
usbhid ide_cd cdrom sg sd_mod generic
piix ide_core shpchp pci_hotplug ehci_hcd intel_agp agpgart sata_sil i2c_i801
libata i2c_core scsi_mod i8xx_tco uhci_
hcd usbcore parport_pc parport ipv6 unionfs nfs lockd nfs_acl sunrpc af_packet
e1000 mii
CPU: 0
EIP: 0060:[<f8869759>] Tainted: G U VLI
EFLAGS: 00010202 (2.6.16.13-4-smp #1)
EIP is at unionfs_file_revalidate+0x3e9/0x9b0 [unionfs]
eax: 00000000 ebx: 00000000 ecx: f6ea83a8 edx: f6dcc680
esi: f67939d8 edi: f6b01d40 ebp: f693e000 esp: f693ff38
ds: 007b es: 007b ss: 0068
Process exportfs (pid: 2167, threadinfo=f693e000 task=dfe576b0)
Stack: <0>00000010 f6a54440 c015c7cf f677d198 00000001 f6b01d40 f6db7000
f67939d8
00000001 00000000 00000000 00000004 00000001 00000001 00000001 f67939d8
f68f98c0 c016f6c2 f6b01d40 00000f9a f6b01d40 f693e000 f886a1d3 08050a50
Call Trace:
[<c015c7cf>] __fput+0x140/0x16a
[<c016f6c2>] dput+0x31/0x12f
[<f886a1d3>] unionfs_flush+0x13/0x100 [unionfs]
[<c015a26e>] filp_close+0x2f/0x54
[<c0103c2b>] sysenter_past_esp+0x54/0x79
Code: 0f 88 a2 05 00 00 8b 74 24 1c 8b 46 50 8b 80 78 01 00 00 8b 50 1c 89 d8
c1 e0 04 f6 44 10 0c 02 74 19 8b 41 28
8b 04 98 8b 40 0c <8b> 80 9c 00 00 00 f6 40 30 01 0f 84 10 fd ff ff 8b 5c 24 14
8b
NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
...
#########################################################################
Martin
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