Re: [PATCH 6.6 0000/1674] 6.6.160-rc1 review

[Peter Schneider <pschneider1968@googlemail.com>]

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Hi Greg and Sasha,

Am 18.10.2026 um 07:54 schrieb Peter Schneider:
> Am 17.10.2026 um 17:37 schrieb Greg Kroah-Hartman:
>> This is the start of the stable review cycle for the 6.6.160 release.
>> There are 1674 patches in this series, all will be posted as a response
>> to this one.  If anyone has any issues with these being applied, please
>> let me know.
> 
> This rc-Kernel crashes with a kernel panic on my 2-socket Ivy Bridge Xeon E5-2697v2 server, when I boot into it. Will 
> bisect the issue, but unfortunately I have no time for this today, because I will be off for playing a chess team match 
> in an hour, and that's about all I'll do today. Will hopefully do the bisect on Monday.
> 

So the kernel crash I encountered on my 2-socket Ivy Bridge Xeon E5-2697v2 server was this one (sorry for the low 
quality screenshot), within function RIP: 0010:exra_is_visible+0x14/0x20

https://www.peters-netzplatz.de/download/Kernel_Panic_6.6.160-rc1.jpg

I bisected the issue, and this was the first bad commit:

# first bad commit: [7c1e132b0967210526de05e7af6f1c26ad0c1516] sysfs: Introduce a mechanism to hide static attribute_groups

which is upstream commit [d87c295f599cab2ab3b3df53a9098adba4a6002b].

I think the problem is, that if you take this patch for stable, you need to also take the patch which is upstream [ 
cd69fedf58f8ab1ab511f7c6ac1969cebf1c935f] sysfs: Fix crash on empty group attributes array. It addresses the exact crash 
that I've run into.

Please see
https://lore.kernel.org/all/170863445442.1479840.1818801787239831650.stgit@dwillia2-xfh.jf.intel.com/


I applied that patch on top of 6.6.160-rc1, and this fixed the issue for me: The resulting kernel booted fine, and seems 
to work without problem.

Or maybe you should even consider to take the whole series (3 patches), which are:

Dan Williams (3):
       sysfs: Fix crash on empty group attributes array
       sysfs: Document new "group visible" helpers
       sysfs: Introduce DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE()


  fs/sysfs/group.c      |    4 +-
  include/linux/sysfs.h |   85 +++++++++++++++++++++++++++++++++++++++++++++++--
  2 files changed, 84 insertions(+), 5 deletions(-)

base-commit: 70317fd24b419091aa0a6dc3ea3ec7bb50c37c32


Please see https://lore.kernel.org/all/170863444851.1479840.10249410842428140526.stgit@dwillia2-xfh.jf.intel.com/


Beste Grüße,
Peter Schneider

-- 
Climb the mountain not to plant your flag, but to embrace the challenge,
enjoy the air and behold the view. Climb it so you can see the world,
not so the world can see you.                    -- David McCullough Jr.

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