Oops on umount

[Seth Mos <knuffie@xxxxxxxxx>]

Hi,

[root@lsautom hdc]# mkfs -t xfs -l size=32768b -f /dev/hdc1
[root@lsautom hdc]# mount -t xfs /dev/hdc1 hdc
[root@lsautom hdc]# cd hdc
[root@lsautom hdc]# time gzip -dc 
users/home/samba/archief/lsintra.dump/root.dump.gz |restore -rvf -

<snip verbose restore>

[root@lsautom hdc]# mount
/dev/hda1 on / type ext2 (rw)
none on /proc type proc (rw)
usbdevfs on /proc/bus/usb type usbdevfs (rw)
/dev/hda6 on /users type xfs (rw)
/dev/hda8 on /tmp type xfs (rw,noexec,nosuid,nodev)
/dev/hda5 on /usr type xfs (rw)
/dev/hda7 on /var type xfs (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/hdc1 on /mnt/hdc type xfs (rw)
[root@lsautom hdc]# cd ..
[root@lsautom /mnt]# umount hdc
[root@lsautom /mnt]# mount -t xfs -o logbufs=8,logbsize=32768 /dev/hdc1 hdc
[root@lsautom /mnt]# cd hdc
[root@lsautom hdc]# cd ..
[root@lsautom /mnt]# umount hdc
Segmentation fault

No system hang but this one is ugly.

[root@lsautom /mnt]#dmesg
<snip dmesg>
Start mounting filesystem: ide1(22,1)
Ending clean XFS mount for filesystem: ide1(22,1)
Start mounting filesystem: ide1(22,1)
Ending clean XFS mount for filesystem: ide1(22,1)
Start mounting filesystem: ide1(22,1)
Ending clean XFS mount for filesystem: ide1(22,1)
Unable to handle kernel NULL pointer dereference at virtual address 00000010
 printing eip:
c01aa951
*pde = 00000000
Oops: 0002
CPU:    0
EIP:    0010:[<c01aa951>]
EFLAGS: 00010086
eax: 00000000   ebx: c5b8d028   ecx: 00000858   edx: 00010000
esi: c7cf4d80   edi: c2b2cc00   ebp: 00000296   esp: c426fe18
ds: 0018   es: 0018   ss: 0018
Process umount (pid: 941, stackpage=c426f000)
Stack: c5b8d028 c7cf4d80 c2b2cc00 c426fe90 c01a9014 c7cf4d80 c5b8d028 c2b2cc00
       00000858 c7cf4d80 00000258 00000001 000000aa 00000000 c426fe94 c7cf4d80
       c2b2cc00 00000000 c01a9193 c2b2cc00 00000258 00000001 c426fe90 000000aa
Call Trace: [<c01a9014>] [<c01a9193>] [<c01b12a2>] [<c01a9100>] 
[<c01b0d4d>] [<c01b91f1>] [<c01c354e>]
       [<c01ca3a0>] [<c0134357>] [<c013364a>] [<c0134741>] [<c0134816>] 
[<c0121706>] [<c0134850>] [<c0108db7>]

Code: 89 58 10 8b 86 98 00 00 00 89 58 14 80 4b 27 04 f6 86 b0 00

Pulled it through ksymoops

[root@lsautom /root]# ksymoops -m /boot/System.map-2.4.2-XFS < umount.crash
ksymoops 2.3.4 on i686 2.4.2-XFS.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.2-XFS/ (default)
     -m /boot/System.map-2.4.2-XFS (specified)

Unable to handle kernel NULL pointer dereference at virtual address 00000010
c01aa951
*pde = 00000000
Oops: 0002
CPU:    0
EIP:    0010:[<c01aa951>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010086
eax: 00000000   ebx: c5b8d028   ecx: 00000858   edx: 00010000
esi: c7cf4d80   edi: c2b2cc00   ebp: 00000296   esp: c426fe18
ds: 0018   es: 0018   ss: 0018
Process umount (pid: 941, stackpage=c426f000)
Stack: c5b8d028 c7cf4d80 c2b2cc00 c426fe90 c01a9014 c7cf4d80 c5b8d028 c2b2cc00
       00000858 c7cf4d80 00000258 00000001 000000aa 00000000 c426fe94 c7cf4d80
       c2b2cc00 00000000 c01a9193 c2b2cc00 00000258 00000001 c426fe90 000000aa
Call Trace: [<c01a9014>] [<c01a9193>] [<c01b12a2>] [<c01a9100>] 
[<c01b0d4d>] [<c01b91f1>] [<c01c354e>]
       [<c01ca3a0>] [<c0134357>] [<c013364a>] [<c0134741>] [<c0134816>] 
[<c0121706>] [<c0134850>] [<c0108db7>]
Code: 89 58 10 8b 86 98 00 00 00 89 58 14 80 4b 27 04 f6 86 b0 00

>>EIP; c01aa951 <xlog_grant_log_space+31/238>   <=====
Trace; c01a9014 <xfs_log_reserve+84/8c>
Trace; c01a9193 <xfs_log_unmount_write+83/18c>
Trace; c01b12a2 <xfs_sb_relse+e/14>
Trace; c01a9100 <xfs_log_unmount+c/1c>
Trace; c01b0d4d <xfs_unmountfs+61/ac>
Trace; c01b91f1 <xfs_unmount+161/170>
Trace; c01c354e <fs_dounmount+5a/74>
Trace; c01ca3a0 <linvfs_put_super+58/c8>
Trace; c0134357 <kill_super+87/138>
Trace; c013364a <remove_vfsmnt+8a/90>
Trace; c0134741 <do_umount+1b9/1c4>
Trace; c0134816 <sys_umount+ca/f8>
Trace; c0121706 <sys_munmap+2a/3c>
Trace; c0134850 <sys_oldumount+c/10>
Trace; c0108db7 <system_call+33/38>
Code;  c01aa951 <xlog_grant_log_space+31/238>
00000000 <_EIP>:
Code;  c01aa951 <xlog_grant_log_space+31/238>   <=====
   0:   89 58 10                  mov    %ebx,0x10(%eax)   <=====
Code;  c01aa954 <xlog_grant_log_space+34/238>
   3:   8b 86 98 00 00 00         mov    0x98(%esi),%eax
Code;  c01aa95a <xlog_grant_log_space+3a/238>
   9:   89 58 14                  mov    %ebx,0x14(%eax)
Code;  c01aa95d <xlog_grant_log_space+3d/238>
   c:   80 4b 27 04               orb    $0x4,0x27(%ebx)
Code;  c01aa961 <xlog_grant_log_space+41/238>
  10:   f6 86 b0 00 00 00 00      testb  $0x0,0xb0(%esi)


What's going on here?

Bye
--
Seth
Has anybody seen my lightbulb?
I _really_ need some light here.