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

[Joseph Salisbury]

On 09/10/2018 04:23 PM, Tyler Hicks wrote:
> 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,
Correct, this request is for Bionic.  Set too many cosmic requests today :-)
>
> 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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