ACK: [SRU][Artful][Bionic][PATCH 0/1] x86/intel_rdt/cqm: Prevent use after free

[Khaled Elmously]

On 2018-01-19 09:46:43 , Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1733662
> 
> == SRU Justification ==
> The following mainline commit introduced a regression in v4.14-rc1:
> 24247aeeabe9 ("x86/intel_rdt/cqm: Improve limbo list processing")
> 
> This commit made it's way into Artful via Launchpad bug 1591609 as Artful commit
> ac2fc5adab0f4b.
> 
> This bug was causing regression tests to hang about one in four 
> times when running cpu_offlining tests.
> 
> This patch to fix this regression was just submitted to mainline, so it is also
> needed in Bionic.
>  
> == Fix ==
> commit d47924417319e3b6a728c0b690f183e75bc2a702
> Author: Thomas Gleixner <tglx at linutronix.de>
> Date:   Tue Jan 16 19:59:59 2018 +0100
> 
>     x86/intel_rdt/cqm: Prevent use after free
> 
> == Regression Potential ==
> Low.  This patch fixes a current regression that is a use after free.
> 
> == Test Case ==
> A test kernel was built with this patch and tested by the original bug reporter.
> The bug reporter states the test kernel resolved the bug.
> 
> Thomas Gleixner (1):
>   x86/intel_rdt/cqm: Prevent use after free
> 
>  arch/x86/kernel/cpu/intel_rdt.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
Acked-by: Khalid Elmously <khalid.elmously at canonical.com>