[linux-cifs-client] mount.cifs and dfs referrals

[Werner Maes]

hello

I wanted to know whether mount.cifs is able to follow dfs referrals.
On my system I get a kernel failure if I try this

mount.cifs //AD-DOMAIN/DFS /mnt -o username="AD\user" 

/mnt seems to be mounted
//xx.yy.KULEUVEN.BE/xx/ on /mnt type cifs (rw,mand)

but if I do ll /mnt, I get a segmentation fault and this appears in dmesg (see below):

so my question is: is mount.cifs able to follow dfs links like smbclient can?

kind regards

werner

kernel BUG at fs/cifs/cifs_dfs_ref.c:274!
invalid opcode: 0000 [#1] SMP 
Modules linked in: nls_utf8 cifs fuse sunrpc ipv6 dm_multipath uinput ppdev floppy pcspkr i2c_piix4 pcnet32 mii parport_pc i2c_core parport BusLogic [last unloaded: microcode]

Pid: 5110, comm: ls Not tainted (2.6.27.12-170.2.5.fc10.i686 #1)
EIP: 0060:[<d09d6ef1>] EFLAGS: 00010246 CPU: 0
EIP is at cifs_dfs_follow_mountpoint+0x3b/0x627 [cifs]
EAX: c68ce7f8 EBX: c68ce7f8 ECX: d09ec7dc EDX: cfb85f38
ESI: cfb85f38 EDI: ce5d3000 EBP: cfb85e88 ESP: cfb85e3c
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process ls (pid: 5110, ti=cfb85000 task=c1613340 task.ti=cfb85000)
Stack: cfb85e58 cfb85f38 cf84af68 cf84af00 ce5d3000 cfb85e70 c04a4a55 c06a9411 
       cf0565d8 cfb85edc cfb85f38 cfb85edc ce5d3000 cfb85e78 00000000 00000000 
       00000000 cfb85f38 ce5d3000 cfb85eb4 c049941c cfb85edc cfb85edc c68ce7f8 
Call Trace:
 [<c04a4a55>] ? mntput_no_expire+0x1a/0xf7
 [<c06a9411>] ? _spin_lock+0x8/0xb
 [<c049941c>] ? do_follow_link+0xdb/0x272
 [<c0499110>] ? __link_path_walk+0x5b2/0x6b5
 [<c04995ff>] ? path_walk+0x4c/0x9b
 [<c04997fb>] ? do_path_lookup+0x12d/0x175
 [<c049a8fa>] ? user_path_at+0x3c/0x62
 [<c04a4a55>] ? mntput_no_expire+0x1a/0xf7
 [<c0497986>] ? mntput+0x13/0x15
 [<c04a9021>] ? sys_getxattr+0x1e/0x49
 [<c051edbc>] ? trace_hardirqs_on_thunk+0xc/0x10
 [<c0403c6e>] ? syscall_call+0x7/0xb
 =======================
Code: d0 01 89 55 b8 c7 45 f0 00 00 00 00 c7 45 ec 00 00 00 00 74 11 68 94 a6 9d d0 68 2f 64 9e d0 e8 82 08 cd ef 59 5e 3b 5b 18 75 04 <0f> 0b eb fe e8 20 7c ff ff f6 05 00 da 9e d0 01 89 45 bc 74 21 
EIP: [<d09d6ef1>] cifs_dfs_follow_mountpoint+0x3b/0x627 [cifs] SS:ESP 0068:cfb85e3c



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