lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Thu, 8 Feb 2024 15:48:58 +0000
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: kernel test robot <oliver.sang@...el.com>
Cc: Zhen Lei <thunder.leizhen@...wei.com>, oe-lkp@...ts.linux.dev,
	lkp@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [linus:master] [kobject]  1b28cb81da: canonical_address#:#[##]

On Wed, Feb 07, 2024 at 02:42:43PM +0800, kernel test robot wrote:
> 
> 
> Hello,
> 
> kernel test robot noticed "canonical_address#:#[##]" on:
> 
> commit: 1b28cb81dab7c1eedc6034206f4e8d644046ad31 ("kobject: Remove redundant checks for whether ktype is NULL")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> 
> [test failed on linus/master 54be6c6c5ae8e0d93a6c4641cb7528eb0b6ba478 (v6.8-rc3)]
> [test failed on linux-next/master 076d56d74f17e625b3d63cf4743b3d7d02180379]
> 
> in testcase: boot
> 
> compiler: gcc-11
> test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
> 
> (please refer to attached dmesg/kmsg for entire log/backtrace)
> 
> 
> 
> we noticed this issue is very random, as below, observed 4 times out of 68 runs.
> but we didn't see in on parent.

Ok, this is odd, but a good enough reason to revert this for now.  I was
worried about it, and this confirms my worry that there's some codepath
we aren't taking into account here that those checks were protecting us
from doing bad things.

thanks for the report, and Zhen, if you want to dig into this and see if
you can figure out what is happening so that you can submit your change
again, that would be great.

greg k-h

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ