[Bug 663634] [NEW] cifs mount segmentation fault 10.04 64-bit

Fri Oct 22 21:48:13 UTC 2010

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Binary package hint: ubuntu-docs

Segmentation Fault attempting to mount to windows shared drive using mount -t cifs command
In: /lib/modules/2.6.32-25-generic/kernel/fs/cifs
 lsb_release -rd
Description:	Ubuntu 10.04.1 LTS
Release:	10.04
Note ... no problem mounting via Places/Connect to server
However ... Places/Connect to Server doesn't map to a directory I can use from a terminal window

See dmesg snippet below:

[  833.202543] ------------[ cut here ]------------
[  833.202548] kernel BUG at /build/buildd/linux-2.6.32/fs/cifs/cifs_dfs_ref.c:317!
[  833.202554] invalid opcode: 0000 [#1] SMP 
[  833.202560] last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0A:00/power_supply/BAT0/charge_full
[  833.202566] CPU 6 
[  833.202569] Modules linked in: nls_cp437 cifs rfcomm sco binfmt_misc ppdev bridge stp bnep snd_hda_codec_idt ipt_REJECT l2cap ipt_LOG xt_limit xt_tcpudp ipt_addrtype xt_state ip6table_filter ip6_tables nf_nat_irc nf_conntrack_irc nf_nat_ftp snd_hda_intel nf_nat snd_hda_codec snd_seq_dummy nf_conntrack_ipv4 nf_defrag_ipv4 arc4 snd_seq_oss snd_hwdep nf_conntrack_ftp snd_pcm_oss snd_seq_midi nf_conntrack uvcvideo iptable_filter snd_mixer_oss iwlagn snd_rawmidi fbcon tileblit snd_seq_midi_event videodev v4l1_compat ip_tables usbhid jmb38x_ms iwlcore font btusb snd_pcm mac80211 bitblit softcursor joydev bluetooth snd_seq x_tables v4l2_compat_ioctl32 hid snd_timer snd_seq_device psmouse serio_raw memstick cfg80211 snd sdhci_pci sdhci nvidia(P) vga16fb vgastate soundcore snd_page_alloc lirc_ene0100 lirc_dev hp_accel lis3lv02d input_polldev video led_class output lp parport r8169 mii ahci ohci1394 ieee1394
[  833.202690] Pid: 2342, comm: mount Tainted: P           2.6.32-25-generic #44-Ubuntu HP Pavilion dv7 Notebook PC
[  833.202695] RIP: 0010:[<ffffffffa0bc22d8>]  [<ffffffffa0bc22d8>] cifs_dfs_follow_mountpoint+0x2e8/0x3c4 [cifs]
[  833.202717] RSP: 0018:ffff880196cb5ca8  EFLAGS: 00010246
[  833.202721] RAX: ffffffffa0bc6fe0 RBX: ffff880196cb5e58 RCX: 00000000000017b4
[  833.202726] RDX: 00000000000017b4 RSI: ffff880196cb5e58 RDI: ffff88019440a480
[  833.202731] RBP: ffff880196cb5d18 R08: 0000000000000001 R09: 0000000000001000
[  833.202735] R10: 0000000001c64980 R11: 0000000000000283 R12: ffff88019440a480
[  833.202740] R13: 0000000000000000 R14: ffff880196cb5d98 R15: ffff880196cb5d98
[  833.202746] FS:  00007f3f7c4197e0(0000) GS:ffff880028380000(0000) knlGS:0000000000000000
[  833.202751] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  833.202755] CR2: 00007f3f7b6f5bf0 CR3: 0000000196ecf000 CR4: 00000000000006e0
[  833.202760] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  833.202765] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  833.202770] Process mount (pid: 2342, threadinfo ffff880196cb4000, task ffff8801b58644d0)
[  833.202774] Stack:
[  833.202776]  ffff880196cb5e58 ffff880196cb5d98 ffff880196cb5e58 ffff8801b7aeb600
[  833.202783] <0> ffff880196cb5cf8 ffffffff8115ec60 0000000000000000 0000000096cb5e58
[  833.202791] <0> 0000000000000000 ffff88019440a480 ffff880196cb5e58 0000000000000000
[  833.202799] Call Trace:
[  833.202810]  [<ffffffff8115ec60>] ? mntput_no_expire+0x30/0x110
[  833.202818]  [<ffffffff8114fd9b>] __link_path_walk+0xcfb/0xf80
[  833.202825]  [<ffffffff8115029a>] path_walk+0x6a/0xe0
[  833.202832]  [<ffffffff8115046b>] do_path_lookup+0x5b/0xa0
[  833.202838]  [<ffffffff81151137>] user_path_at+0x57/0xa0
[  833.202848]  [<ffffffff810fb62d>] ? free_hot_page+0x2d/0x60
[  833.202854]  [<ffffffff8115ec60>] ? mntput_no_expire+0x30/0x110
[  833.202863]  [<ffffffff811474df>] sys_readlinkat+0x3f/0xc0
[  833.202870]  [<ffffffff8114757b>] sys_readlink+0x1b/0x20
[  833.202879]  [<ffffffff810121b2>] system_call_fastpath+0x16/0x1b
[  833.202883] Code: c0 cb 00 00 48 8b 80 50 04 00 00 44 89 fa 48 c7 c6 a0 70 bc a0 48 c7 c7 98 60 bd a0 8b 48 1c 31 c0 e8 c9 e7 97 e0 e9 70 fd ff ff <0f> 0b eb fe 41 83 c6 01 44 39 75 cc 0f 87 ff fd ff ff 44 89 6d 
[  833.202944] RIP  [<ffffffffa0bc22d8>] cifs_dfs_follow_mountpoint+0x2e8/0x3c4 [cifs]
[  833.202961]  RSP <ffff880196cb5ca8>
[  833.202966] ---[ end trace 72f1d9a474272541 ]---

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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cifs mount segmentation fault 10.04 64-bit
https://bugs.launchpad.net/bugs/663634
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