ACK (for Bionic!): [Cosmic][v2][PATCH 0/3] Fixes for lp1788563

[Tyler Hicks]

On 09/10/2018 02:37 PM, Joseph Salisbury wrote:
> BugLink: https://bugs.launchpad.net/bugs/1788563
> 
> == SRU Justification ==
> This bug has been reported in multiple bugs and affects Trusty,
> Xenial and Bionic.  All releases need different backports, so T and X
> will be sent in separate SRU requests.
> 
> Due to this bug in the original L1TF patch set, L1TF mitigation not
> effective in certain CPU and installed RAM configurations.
> 
> == Fixes ==
> 9df9516940a6 ("x86/speculation/l1tf: Fix overflow in l1tf_pfn_limit() on 32bit")
> b0a182f87568 ("x86/speculation/l1tf: Fix off-by-one error when warning that system has too much RAM")
> cc51e5428ea5 ("x86/speculation/l1tf: Increase l1tf memory limit for Nehalem+")
> 
> == Regression Potential ==
> Low.  These are security fixes and have all been cc'd to upstream
> stable, so they have had additional upstream review.
> 
> == 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.

IIUC, this patch set is mislabeled as being against Cosmic but it is
actually for Bionic. For Bionic,

Acked-by: Tyler Hicks <tyhicks at canonical.com>

Tyler

> 
> 
> Andi Kleen (1):
>   x86/speculation/l1tf: Increase l1tf memory limit for Nehalem+
> 
> Vlastimil Babka (2):
>   x86/speculation/l1tf: Fix overflow in l1tf_pfn_limit() on 32bit
>   x86/speculation/l1tf: Fix off-by-one error when warning that system
>     has too much RAM
> 
>  arch/x86/include/asm/processor.h |  6 ++++--
>  arch/x86/kernel/cpu/bugs.c       | 46 +++++++++++++++++++++++++++++++++++-----
>  arch/x86/kernel/cpu/common.c     |  3 +++
>  arch/x86/mm/init.c               |  4 ++--
>  arch/x86/mm/mmap.c               |  2 +-
>  5 files changed, 51 insertions(+), 10 deletions(-)
> 


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