Package: nfs-kernel-server
Version: 1:1.0.6-3.1
Severity: normal
I Get a kernel NULL pointer dereference on the 2.4.27-2-686 once in a
while when using a NFS-exported unionfs directory. The kernel message is
---------------------
Unable to handle kernel NULL pointer dereference at virtual address 00000014
printing eip:
e1056748
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<e1056748>] Not tainted
EFLAGS: 00010246
eax: dfc53ea0 ebx: db76c200 ecx: dfc53ea0 edx: 00000000
esi: c6be2a40 edi: 00000000 ebp: c33dbcac esp: c33dbc14
ds: 0018 es: 0018 ss: 0018
Process nfsd (pid: 22733, stackpage=c33db000)
Stack: 0000000c 000001f0 00000323 00000004 e1114940 e111b2a0 e1114d3a e11148b9
00000323 ddce7820 c01c3fa9 ddce7820 00000000 ddce7864 ddce7864 e111e258
ddce7820 c33fbec8 00000246 ddce7854 db76c200 00000000 00000000 00000001
Call Trace: [<e1114940>] [<e111b2a0>] [<e1114d3a>] [<e11148b9>] [<c01c3fa9>]
[<e111e258>] [<c01d396f>] [<e111b0a0>] [<c013efd3>] [<e09ab408>] [<e111b0a0>]
[<e09ab93e>] [<c020074d>] [<e10efc84>] [<e1115b2d>] [<e1115b06>] [<e1115afe>]
[<e1115b06>] [<c0151ec1>] [<c01520bf>] [<e09ab5a7>] [<e09abb83>] [<e09abf52>]
[<e09b3a2b>] [<e09ba7e4>] [<e09a9639>] [<e09a9570>] [<e0990317>] [<e09ba7e4>]
[<e09ba0f8>] [<e09ba118>] [<e09a93fe>] [<c010735e>] [<e09a9210>]
Code: 8b 7f 14 8b 4d b8 89 7d b4 89 79 04 8b 5d b4 8b 45 0c 89 5d
---------------------
And the /etc/exports looks like (not all of it):
---------------------
/disks/build/ cb(fsid=561,rw,no_root_squash,sync)
---------------------
The fsid is needed with unionfs, which has so-so support for NFS exporting.
// Simon
-- System Information:
Debian Release: 3.1
Architecture: i386 (i686)
Kernel: Linux 2.6.8-2-686
Locale: LANG=C, LC_CTYPE=sv_SE (charmap=ISO-8859-1)
Versions of packages nfs-kernel-server depends on:
ii debconf 1.4.30.13 Debian configuration management sy
ii libc6 2.3.2.ds1-22 GNU C Library: Shared libraries an
ii libwrap0 7.6.dbs-8 Wietse Venema's TCP wrappers libra
ii nfs-common 1:1.0.6-3.1 NFS support files common to client
ii sysvinit 2.86.ds1-1 System-V like init
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