System Hangs on SMB Shares

[Paul R. Ganci]

Per-Olof Litby - Reg'l Mgr Nordic/Baltic - Java System Software - Sun 
Microsystems wrote:

> My FC2 system allows me to mount SMB shares entered in /etc/fstab/ 
> just fine. But whenever I try to access them in the Nautilus file 
> manager, my entire file system hangs and becomes unreachable. I can 
> still use apps such as terminal and Mozilla, but to get file 
> management back I need to reboot my system.
>
> Is this a known problem?

I believe this is a bug as I and others have had this problem. You can 
check your /var/log/messages file to see if you have a log entry similar 
to the following:

smb_lookup: find //.Trash-jos failed, error=-5
Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
00000000
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
CPU:    0
EIP:    0060:[<00000000>]    Not tainted
EFLAGS: 00010246   (2.6.5)
EIP is at 0x0
eax: d9f94c20   ebx: d68a3f30   ecx: c015e7c0   edx: d81c4ae0
esi: d68a3fa0   edi: c1329600   ebp: d44d85e0   esp: d68a3efc
ds: 007b   es: 007b   ss: 0068
Process nautilus (pid: 6808, threadinfo=d68a2000 task=d6d1cd60)
Stack: c01c16d6 d44d85e0 d68a3fa0 c015e7c0 d68a3f30 00000000 00000002 00000004
       d43c4ec4 00000000 d43c0000 d81c4ae0 d4ac8b60 00000000 fffe7b2a d44d85e0
       00000000 00000000 d43c0000 00000002 00000000 00000000 00000001 00000004
Call Trace:
 [<c01c16d6>] smb_readdir+0x3f6/0x5a0
 [<c015e7c0>] filldir64+0x0/0x120
 [<c015e489>] vfs_readdir+0x89/0xa0
 [<c015e7c0>] filldir64+0x0/0x120
 [<c015e94e>] sys_getdents64+0x6e/0xaa
 [<c015e7c0>] filldir64+0x0/0x120
 [<c0107009>] sysenter_past_esp+0x52/0x71
 
Code:  Bad EIP value.

I found a work around from this bug report 
(http://bugme.osdl.org/show_bug.cgi?id=2642):

 killall -STOP nautilus
smbmount //your/share  /mntpoint
killall -CONT nautilus

I can confirm that this procedure works for me as I have not had a hang 
since using it. You can read the bug report to get details on why this 
problem might be occurring. This procedure may not help you since you 
are using fstab to do the mounts, but as a temporary solution you could 
comment out the fstab entries and mount the shares manually using the 
procedure above.

-- 
Paul (ganci at nurdog.com)