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OS X Lion gets kernel panic when connecting via CIFS

A customer of ours has problems with OS X Lion clients that get kernel panic when connecting via CIFS (Novell OES server).
Any new on this issue?
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Tycho Sjögren
Apoio AB
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First I've heard of it. What exact OES version/SP/patch level? Does it happen 100% of the time on 100% of the Macs?

Andrew C Taubman (Sorry, support is not provided via e-mail) Opinions expressed above are not necessarily those of Micro Focus.
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On 15/12/2011 23:56, ataubman wrote:

> First I've heard of it. What exact OES version/SP/patch level? Does it
> happen 100% of the time on 100% of the Macs?


Not the first I've heard of it but I'm not surprised it's the first you
have as I don't think there is a bug logged (I've had a UK customer contact
me directly to ask about this).

In addition to server info, what version of Mac OS X Lion?

HTH.
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Simon
Novell/SUSE/NetIQ Knowledge Partner
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On 15/12/2011 18:36, tychosjogren wrote:

> A customer of ours has problems with OS X Lion clients that get kernel
> panic when connecting via CIFS (Novell OES server).
> Any new on this issue?


Are you trying to connect to a NetWare or OES2 (Linux) server?

The reference to "Novell OES" suggests that latter whilst I've heard of
this with NetWare 6.5.

HTH.
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Simon
Novell/SUSE/NetIQ Knowledge Partner

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On 17/12/2011 23:34, Simon Flood wrote:

> Not the first I've heard of it but I'm not surprised it's the first you
> have as I don't think there is a bug logged (I've had a UK customer contact
> me directly to ask about this).


Re-reading the original message now I'm more awake it suggests they've
seen the problem with OES2 whereas I've heard of it with NetWare 6.5
hence my request for clarification.

HTH.
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Simon
Novell/SUSE/NetIQ Knowledge Partner

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Sorry for the late response - had to check a few things with the customer.
They use the latest OES version with all the latest sp and patches applied. They have even tested with the an OES 11 beta with the same result. The OS run as a VM on VMware in 64 bit mode attached to a SAN. Has also been tested as a plain install without VMware. The Lion version is 10.7.2.

This is how the problem occurs:
1. Mount the CIFS share - no problems
2. Use the share - no problems
3. If the network connection drops you get a message that the CIFS volume has disappeared and you are asked to unmount it. When you do that you get a kernel panic. You can force the problem to happen by turning of WiFi.
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tychosjogren wrote:

>
> Sorry for the late response - had to check a few things with the
> customer.
> They use the latest OES version with all the latest sp and patches
> applied. They have even tested with the an OES 11 beta with the same
> result. The OS run as a VM on VMware in 64 bit mode attached to a SAN.
> Has also been tested as a plain install without VMware. The Lion version
> is 10.7.2.
>
> This is how the problem occurs:
> 1. Mount the CIFS share - no problems
> 2. Use the share - no problems
> 3. If the network connection drops you get a message that the CIFS
> volume has disappeared and you are asked to unmount it. When you do that
> you get a kernel panic. You can force the problem to happen by turning
> of WiFi.
>
>


I can confirm that this happens. It happened to me over the weekend in
testing. The mac has an issue when disconnecting cifs share. Otherwise it
work fine. Just can't disconnect it. Mine is not in vmware. Mine are
physical.



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Snow Leopard works great for us, but not Lion. Have the same issue.

I asked Novell with a service request 13:th of December and got this answer:
Hi Christian, With regards to Service Request # 10736787221 (CIFS making Mac do Kernel Panic): I am sending you this email as I did more research, the issue you are facing is not related to CIFS but to the OS Lion. If you use for example SMB from a windows server, you will have the same issue. As you already mentioned, you only have this issue with the OS Lion, not snow leopard. Regarding this I can only suggest you to contact Apple support, I found a bug number in the Apple forums : 9944016. Please let me know if there is anything else I can do regarding this service request before close it.

Anyone with good support from Apple?

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As far as I know this doesn't happen when loosing connection to CIFS MS Windows share, so it doesn't seem to be a general problem with the new smb implementation in Lion.
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tychosjogren;2162328 wrote:
Sorry for the late response - had to check a few things with the customer.
They use the latest OES version with all the latest sp and patches applied. They have even tested with the an OES 11 beta with the same result. The OS run as a VM on VMware in 64 bit mode attached to a SAN. Has also been tested as a plain install without VMware. The Lion version is 10.7.2.

This is how the problem occurs:
1. Mount the CIFS share - no problems
2. Use the share - no problems
3. If the network connection drops you get a message that the CIFS volume has disappeared and you are asked to unmount it. When you do that you get a kernel panic. You can force the problem to happen by turning of WiFi.


So it is OES2 but which version (SP1, SP2, or SP3)? Interesting as I'd only heard of this with NetWare 6.5.

Do you (and anyone else experiencing this issue in this thread) know if this has recently started happening, perhaps after the latest November 2011 Scheduled Maintenance patches were installed?

I'll hopefully be able to do some testing tomorrow but in the meantime I've asked Novell ...

HTH.
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SLES 10 sp4 with OES 2 sp3 and all patches applied.
The problem might have grown worse after the last patches were applied a few weeks ago, but we don't have any data to confirm it.
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Another customer is experiencing the same issue. However, according to the apple forums, it appears this is going to Windows shares as well: https://discussions.apple.com/message/16123727#16123727 and they have opened a bug with Apple (# 9944016). I can't seem to find the dialog of the Apple bug but I'm wondering if it's in the eminent 10.7.3 (see screen shot in Apple releases OS X Lion 10.7.3 build 11D46 with no known issues ahead of public release | 9to5Mac | Apple Intelligence).

If anyone has access to the Apple bug database, does this bug number yield any further info?
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