linux crash

Hello

We are testing the HSF driver (free version). But there seems so be a 
problem related to this driver. Sometimes linux crashes (had to power 
cycle the computer). In syslog I can find the following lines:


Oct  4 13:49:46 irun kernel: [601735.604554] ------------[ cut here 
]------------
Oct  4 13:49:46 irun kernel: [601735.604559] kernel BUG at 
/build/buildd/linux-2.6.32/mm/slub.c:2969!
Oct  4 13:49:46 irun kernel: [601735.604562] invalid opcode: 0000 [#1] SMP
Oct  4 13:49:46 irun kernel: [601735.604565] last sysfs file: 
/sys/devices/pci0000:00/0000:00:1f.5/host2/target2:0:0/2:0:0:0/block/sda/queue/rotational
Oct  4 13:49:46 irun kernel: [601735.604568] Modules linked in: 
hsfusbcd2 hsfmc97sis hsfmc97ati hsfmc97ali hsfmc97via hsfmc97ich 
hsfpcibasic3 hsfpcibasic2 hsfserial hsfengine(P) hsfosspec hsfsoar 
snd_hda_codec_realtek fbcon tileblit fo
nt bitblit softcursor vga16fb vgastate snd_hda_intel coretemp 
snd_hda_codec snd_hwdep lp snd_pcm ppdev i915 snd_timer parport_pc 
drm_kms_helper parport snd drm i2c_algo_bit soundcore intel_agp 
snd_page_alloc video agpgart output usbhid
  hid usb_storage e1000e [last unloaded: hsfosspec]
Oct  4 13:49:46 irun kernel: [601735.604602]
Oct  4 13:49:46 irun kernel: [601735.604605] Pid: 904, comm: khsfd/modem 
Tainted: P           (2.6.32-27-generic #49-Ubuntu) OEM
Oct  4 13:49:46 irun kernel: [601735.604608] EIP: 0060:[<c01fd9e5>] 
EFLAGS: 00010246 CPU: 0
Oct  4 13:49:46 irun kernel: [601735.604613] EIP is at kfree+0xf5/0x100
Oct  4 13:49:46 irun kernel: [601735.604615] EAX: 40000000 EBX: c167c1a0 
ECX: 00000000 EDX: f7ffe000
Oct  4 13:49:46 irun kernel: [601735.604617] ESI: f000d000 EDI: ed168000 
EBP: ed1bfde4 ESP: ed1bfdcc
Oct  4 13:49:46 irun kernel: [601735.604619]  DS: 007b ES: 007b FS: 00d8 
GS: 00e0 SS: 0068
Oct  4 13:49:46 irun kernel: [601735.604622] Process khsfd/modem (pid: 
904, ti=ed1be000 task=ed366600 task.ti=ed1be000)
Oct  4 13:49:46 irun kernel: [601735.604624] Stack:
Oct  4 13:49:46 irun kernel: [601735.604625]  f988b823 00000000 c0766408 
f699a6a4 00000001 ed168000 ed1bfdf4 f988b823
Oct  4 13:49:46 irun kernel: [601735.604631] <0> f69980f0 f699a144 
ed1bfe14 f9b09240 f000d000 c012a688 ed1bfe18 c058d9bf
Oct  4 13:49:46 irun kernel: [601735.604637] <0> f699a6a4 f699a24c 
ed1bfe34 f9a97d0d f699a6a4 00000292 ece48100 ed1bfe34
Oct  4 13:49:46 irun kernel: [601735.604644] Call Trace:
Oct  4 13:49:46 irun kernel: [601735.604653]  [<f988b823>] ? 
cnxthsf_7800206full_OsFree+0x43/0x70 [hsfosspec]
Oct  4 13:49:46 irun kernel: [601735.604659]  [<f988b823>] ? 
cnxthsf_7800206full_OsFree+0x43/0x70 [hsfosspec]
Oct  4 13:49:46 irun kernel: [601735.604692]  [<f9b09240>] ? 
hsfengine5181_+0x20/0x40 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.604697]  [<c012a688>] ? 
default_spin_lock_flags+0x8/0x10
Oct  4 13:49:46 irun kernel: [601735.604701]  [<c058d9bf>] ? 
_spin_lock_irqsave+0x2f/0x50
Oct  4 13:49:46 irun kernel: [601735.604743]  [<f9a97d0d>] ? 
hsfengine5001_+0x9d/0x160 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.604782]  [<f9a937d4>] ? 
hsfengine4094_+0x24/0x80 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.604813]  [<f9a4df7d>] ? 
hsfengine837_+0x9d/0x160 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.604820]  [<f988b823>] ? 
cnxthsf_7800206full_OsFree+0x43/0x70 [hsfosspec]
Oct  4 13:49:46 irun kernel: [601735.604850]  [<f9a4f7f6>] ? 
hsfengine2512_+0xb6/0x170 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.604881]  [<f9a50e4a>] ? 
hsfengine2564_+0xba/0x110 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.604911]  [<f9a514e9>] ? 
hsfengine2478_+0x59/0xb0 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.604915]  [<c0171ca6>] ? 
do_gettimeofday+0x16/0x40
Oct  4 13:49:46 irun kernel: [601735.604945]  [<f9a51be7>] ? 
hsfengine2494_+0x1b7/0x260 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.604976]  [<f9a51bd3>] ? 
hsfengine2494_+0x1a3/0x260 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.605008]  [<f9a55ea3>] ? 
hsfengine1215_+0x1f3/0x320 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.605039]  [<f9a54a41>] ? 
hsfengine745_+0x111/0x150 [hsfengine]
Oct  4 13:49:46 irun kernel: [601735.605045]  [<f988893d>] ? 
TimerThreadFunction+0x1d/0x80 [hsfosspec]
Oct  4 13:49:46 irun kernel: [601735.605052]  [<f9887ecd>] ? 
cnxt_thread+0x15d/0x1d0 [hsfosspec]
Oct  4 13:49:46 irun kernel: [601735.605056]  [<c0142640>] ? 
default_wake_function+0x0/0x20
Oct  4 13:49:46 irun kernel: [601735.605062]  [<f9887d70>] ? 
cnxt_thread+0x0/0x1d0 [hsfosspec]
Oct  4 13:49:46 irun kernel: [601735.605066]  [<c0104087>] ? 
kernel_thread_helper+0x7/0x10
Oct  4 13:49:46 irun kernel: [601735.605068] Code: 8b 03 e9 78 ff ff ff 
8b 3d f0 e1 79 c0 85 ff 0f 84 48 ff ff ff 8b 0f 83 c7 04 89 f2 89 d8 ff 
d1 8b 0f 85 c9 75 f1 e9 32 ff ff ff <0f> 0b eb fe 8d b4 26 00 00 00 00 
55 89 e5 0f 1f 44 00
  00 83 e8
Oct  4 13:49:46 irun kernel: [601735.605104] EIP: [<c01fd9e5>] 
kfree+0xf5/0x100 SS:ESP 0068:ed1bfdcc
Oct  4 13:49:46 irun kernel: [601735.605110] ---[ end trace 
9f19669d05575463 ]---



Linux:

$ uname -a
Linux irun 2.6.32-27-generic #49-Ubuntu SMP Wed Dec 1 23:52:12 UTC 2010 
i686 GNU/Linux


Are there some known problems?

Thanks