[Bugme-new] [Bug 16584] New: CIFS/SMP panic problem

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Fri Aug 13 13:19:10 PDT 2010


https://bugzilla.kernel.org/show_bug.cgi?id=16584

           Summary: CIFS/SMP panic problem
           Product: File System
           Version: 2.5
    Kernel Version: 2.6.35-git11 and previous
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: CIFS
        AssignedTo: fs_cifs at kernel-bugs.osdl.org
        ReportedBy: gacek-2004 at wp.pl
        Regression: No


2.6.35-git11 and previous but older than 2.6.32.14 (last that I've got)


When connecting my se c902 udev running my script:

sleep 4
ifconfig usb0 mtu 1200 192.168.2.254 netmask 255.255.255.0 up
sleep 5
mount /home/memstick >> /var/log/c902.log&
sleep 1
mount /home/phone >> /var/log/c902.log&

then  I've got in all terminals some Oops about SMP

disconnecting c902 will execute kernel panic.

Log from dmesg filelog:


usbcore: registered new interface driver option
option: v0.7.2:USB Driver for GSM modems
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver cdc_eem
usbcore: registered new interface driver cdc_subset
lib80211: common routines for IEEE802.11 drivers
lib80211_crypt: registered algorithm 'NULL'
usb 7-6: new high speed USB device using ehci_hcd and address 3
usb 7-6: New USB device found, idVendor=0fce, idProduct=d0d4
usb 7-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 7-6: Product: Sony Ericsson C902
usb 7-6: Manufacturer: Sony Ericsson
usb 7-6: SerialNumber: 3536260373083970
cdc_acm 7-6:3.1: ttyACM0: USB ACM device
cdc_acm 7-6:3.3: ttyACM1: USB ACM device
cdc_ether 7-6:3.8: usb0: register 'cdc_ether' at usb-0000:00:1d.7-6, CDC
Ethernet Device, 02:80:37:11:03:00
ADDRCONF(NETDEV_CHANGE): usb0: link becomes ready
CIFS: Unknown mount option unixextensions
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffff811ae169>] strncmp+0x6/0x29
PGD 0
Oops: 0000 [#1] SMP
last sysfs file:
/sys/devices/pci0000:00/0000:00:1d.7/usb7/7-6/7-6:3.9/interface
CPU 0
Modules linked in: snd_hda_codec_analog snd_hda_codec_intelhdmi snd_hrtimer
lib80211 uio_cif uio_pdrv_genirq uio_pdrv uio cdc_subset cdc_eem cdc_ether
usbnet option usb_wwan usbserial ohci_hcd usbtmc cdc_acm usblp ldusb iowarrior
usbtest ums_cypress ums_usbat ums_sddr09 ums_sddr55 usb_storage usb_libusual
scsi_wait_scan hid_microsoft hid_cherry hid_ezkey hid_kye hid_chicony
hid_kensington hid_apple hid_logitech hid_cypress hid_belkin hid_monterey cuse
nls_cp850 nls_iso8859_2
nls_iso8859_1 snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq
snd_seq_device snd_pcm_oss snd_mixer_oss fuse snd_hda_codec_realtek hid_a4tech
ath5k snd_hda_intel snd_hda_codec usbhid nvidia(P) snd_hwdep mac80211 snd_pcm
ehci_hcd ath uhci_hcd snd_timer snd cfg80211 usbcore soundcore evdev
snd_page_alloc

Pid: 5339, comm: mount.cifs Tainted: P            2.6.35-git11-ide #15
AB9/AB9RPO(Intel965+ICH8)/OEM
RIP: 0010:[<ffffffff811ae169>]  [<ffffffff811ae169>] strncmp+0x6/0x29
RSP: 0018:ffff8800a5e33ce8  EFLAGS: 00010206
RAX: 0000000000000000 RBX: ffff8800a5f06000 RCX: ffff8800ae469027
RDX: 0000000000000200 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8800a5e33ce8 R08: 0000000000000007 R09: ffff8800ae46908d
R10: 000000000000005c R11: 0000000000000004 R12: ffff88009ff5fc00
R13: ffff88009b310e00 R14: 0000000000000005 R15: ffff88009ff5fe10
FS:  00007f78de32b700(0000) GS:ffff880001800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000008783e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process mount.cifs (pid: 5339, threadinfo ffff8800a5e32000, task
ffff88009b3cb2a0)
Stack:
 ffff8800a5e33d98 ffffffff8112ebe1 ffff8800a5e33d08 ffffffff811ac39e
<0> ffff8800ae469027 ffff8800a5f06030 0100000000000000 ffff8800a0f88800
<0> 000000049ff5fc48 ffff88009ff5fe10 ffff88009b3709a0 ffff88009ff5fe00
Call Trace:
 [<ffffffff8112ebe1>] cifs_mount+0x18ca/0x23f1
 [<ffffffff811ac39e>] ? prop_local_init_percpu+0x28/0x2a
 [<ffffffff8112271d>] cifs_get_sb+0xd5/0x22c
 [<ffffffff810958cb>] vfs_kern_mount+0x5d/0x106
 [<ffffffff810959d2>] do_kern_mount+0x48/0xea
 [<ffffffff810aa68b>] do_mount+0x6d0/0x749
 [<ffffffff810aa933>] sys_mount+0x87/0xc8
 [<ffffffff81001e6b>] system_call_fastpath+0x16/0x1b
Code: 75 e5 c9 c3 55 48 89 e5 8a 07 8a 16 48 ff c7 48 ff c6 38 d0 74 07 19 c0
83 c8 01 eb 06 84 c0 75 e7 31 c0 c9 c3 55 48 89 e5 eb 1a <8a> 07 3a 06 74 07 19
c0 83 c8 01 eb 14 84 c0 74 0e 48 ff c7 48
RIP  [<ffffffff811ae169>] strncmp+0x6/0x29
 RSP <ffff8800a5e33ce8>
CR2: 0000000000000000
---[ end trace 692e1ebe00a7db2f ]---

(sorry for my english)

Btw. why cifs need so much time to umount?

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