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[Bug 695503] ncpfs.ko crashes if access netware 5.1 server mounted via ncpmount tcp or ipx

https://bugzilla.novell.com/show_bug.cgi?id=695503

https://bugzilla.novell.com/show_bug.cgi?id=695503#c1


Martin Burnicki <martin.burnicki@xxxxxxxxxxx> changed:

What |Removed |Added
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CC| |martin.burnicki@xxxxxxxxxxx

--- Comment #1 from Martin Burnicki <martin.burnicki@xxxxxxxxxxx> 2011-09-07
16:28:04 UTC ---
Hi,

I see a very similar bug here:

[ 166.962409] ------------[ cut here ]------------
[ 166.962419] kernel BUG at
/usr/src/packages/BUILD/kernel-default-2.6.37.6/linux-2.6.37/include/linux/dcache.h:340!
[ 166.962427] invalid opcode: 0000 [#1] SMP
[ 166.962433] last sysfs file: /sys/devices/system/cpu/present
[ 166.962438] Modules linked in: fuse nls_utf8 ncpfs vmnet vmblock vsock vmci
nfsd vmmon lockd nfs_acl auth_rpcgss sunrpc exportfs af_packet mga drm edd
mperf nls_iso8859_1 nls_cp437 vfat fat reiserfs dm_mod usb_storage uas i2c_i801
floppy ppdev e1000 sr_mod sg iTCO_wdt cdrom mbgclock parport_pc i2c_core
iTCO_vendor_support intel_rng parport shpchp pcspkr button pci_hotplug ext4
jbd2 crc16 rtc_cmos uhci_hcd rtc_core rtc_lib ehci_hcd usbcore fan processor
thermal thermal_sys hwmon ata_generic aic7xxx scsi_transport_spi ata_piix
libata [last unloaded: preloadtrace]
[ 166.962538]
[ 166.962543] Pid: 4752, comm: dolphin Not tainted 2.6.37.6-0.7-default #1
/D875PBZ
[ 166.962556] EIP: 0060:[<c031eb66>] EFLAGS: 00210246 CPU: 1
[ 166.962566] EIP is at d_validate+0xc6/0xd0
[ 166.962570] EAX: 00000000 EBX: ec20ed74 ECX: f776d580 EDX: ec20ed88
[ 166.962575] ESI: ec0f363c EDI: 20713118 EBP: 00000011 ESP: f1b89ec4
[ 166.962581] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 166.962587] Process dolphin (pid: 4752, ti=f1b88000 task=f1b871b0
task.ti=f1b88000)
[ 166.962592] Stack:
[ 166.962595] f776d580 0001ffff ec20ed74 ec0f363c 0000031b ec0a7b18 f882edde
0000031d
[ 166.962610] f1933b80 e69b0000 f882fe7e f1b89f34 00000000 00000075 00000000
00000004
[ 166.962624] ec0a7b18 e69b0000 f71af01c f5eef600 ec0f363c 00000575 00000000
f1b89f90
[ 166.962638] Call Trace:
[ 166.962656] [<f882edde>] ncp_dget_fpos+0xe/0xa0 [ncpfs]
[ 166.962675] [<f882fe7e>] ncp_readdir+0x3ae/0x5d0 [ncpfs]
[ 166.962689] [<c031cabd>] vfs_readdir+0x9d/0xc0
[ 166.962699] [<c031cc8e>] sys_getdents64+0x6e/0xd0
[ 166.962708] [<c0202f10>] sysenter_do_call+0x12/0x22
[ 166.962720] [<ffffe430>] 0xffffe430
[ 166.962724] Code: d2 74 c2 8b 02 0f 18 00 90 8d 42 ec 39 c3 75 ed 85 db 74
10 8b 03 85 c0 74 11 f0 ff 03 b8 01 00 00 00 eb 8c b8 01 00 00 00 eb 85 <0f> 0b
90 8d b4 26 00 00 00 00 53 89 c3 83 ec 04 a1 00 f7 90 c0
[ 166.962801] EIP: [<c031eb66>] d_validate+0xc6/0xd0 SS:ESP 0068:f1b89ec4
[ 166.962812] ---[ end trace e5a0ef1e4b7c4daf ]---

This is from an openSUSE 11.4 (i586) installation when accessing certain
directories on a NetWare 5.0 server which is mounted via NCP.

It happens with *all* openSUSE 11.4 installations, but it never happens with an
older SuSE/openSUSE version. We have some machines here running e.g. 9.3 / 10.3
/ 11.3, and no problems accessing the same NetWare server.

In the case above this happened when I used Dolphin to browse the NetWare
server, but it also happens when some other application opens a open file or
save file dialog box and you browsw certain directories, or if you enter "cd "
in a console window and then press the tab key for autocompletion, in which
case the directory is scanned.

First I assumed this was due to a directory entry with special characters (e.g.
umlauts), but this does not seem to be the case.

Actually I'm not sure if the reason is a large number of directory entries, or
simply a large workload when browsing a directory.

This is really ugly. I can provide additional information, if required. Just
let me know.

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