ACK: [SRU][Xenial][Wily][Vivid][PATCH 0/2] powerpc/tm: Fixes for LP:1520411

[Brad Figg]

On Fri, Dec 11, 2015 at 01:04:08PM -0500, Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1520411
> 
> == Justification ==
> 
> These two commits fix local DoS (userspace can crash the OS) on powerpc POWER8 
> cpus for any kernel v3.9+.  The commits cherry pick cleanly on X, W, and V.
> However, Trusty and lts-backport-utopic need a seperate pick, so anotger SRU request
> will be sent for them.  
> 
> These commits are in mainline as of 4.4-rc3.  They have also been cc'd to stable, but have 
> not landed in any stable repos as of yet.
> 
> 
> == Fixes ==
> commit d2b9d2a5ad5ef04ff978c9923d19730cb05efd55
> Author: Michael Neuling <mikey at neuling.org>
> Date:   Thu Nov 19 15:44:44 2015 +1100
> 
>     powerpc/tm: Block signal return setting invalid MSR state
> 
> commit 7f821fc9c77a9b01fe7b1d6e72717b33d8d64142
> Author: Michael Neuling <mikey at neuling.org>
> Date:   Thu Nov 19 15:44:45 2015 +1100
> 
>     powerpc/tm: Check for already reclaimed tasks
> 
> 
> 
> == Test Case ==
> A test kernel was built with these patches and tested by the original bug reporter.
> The bug reporter states the test kernel resolved the bug.
> 
> 
> 
> 
> Michael Neuling (2):
>   powerpc/tm: Block signal return setting invalid MSR state
>   powerpc/tm: Check for already reclaimed tasks
> 
>  arch/powerpc/include/asm/reg.h  |  1 +
>  arch/powerpc/kernel/process.c   | 18 ++++++++++++++++++
>  arch/powerpc/kernel/signal_32.c | 14 +++++++++-----
>  arch/powerpc/kernel/signal_64.c |  4 ++++
>  4 files changed, 32 insertions(+), 5 deletions(-)
> 
> -- 
> 1.9.1
> 
> 
> -- 
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Looks good to me.

-- 
Brad Figg brad.figg at canonical.com http://www.canonical.com