Re: [PATCH 4.4 00/37] 4.4.110-stable review

[Nathan Chancellor <natechancellor@gmail.com>]

On Wed, Jan 03, 2018 at 09:11:06PM +0100, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.4.110 release.
> There are 37 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Fri Jan  5 19:50:38 UTC 2018.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.110-rc1.gz
> or in the git tree and branch at:
>   git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 
> -------------
> Pseudo-Shortlog of commits:
> 
> Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>     Linux 4.4.110-rc1
> 
> Kees Cook <keescook@chromium.org>
>     KPTI: Report when enabled
> 
> Kees Cook <keescook@chromium.org>
>     KPTI: Rename to PAGE_TABLE_ISOLATION
> 
> Borislav Petkov <bp@suse.de>
>     x86/kaiser: Move feature detection up
> 
> Jiri Kosina <jkosina@suse.cz>
>     kaiser: disabled on Xen PV
> 
> Borislav Petkov <bp@suse.de>
>     x86/kaiser: Reenable PARAVIRT
> 
> Thomas Gleixner <tglx@linutronix.de>
>     x86/paravirt: Dont patch flush_tlb_single
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: kaiser_flush_tlb_on_return_to_user() check PCID
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: asm/tlbflush.h handle noPGE at lower level
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: drop is_atomic arg to kaiser_pagetable_walk()
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: use ALTERNATIVE instead of x86_cr3_pcid_noflush
> 
> Borislav Petkov <bp@suse.de>
>     x86/kaiser: Check boottime cmdline params
> 
> Borislav Petkov <bp@suse.de>
>     x86/kaiser: Rename and simplify X86_FEATURE_KAISER handling
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: add "nokaiser" boot option, using ALTERNATIVE
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: fix unlikely error in alloc_ldt_struct()
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: _pgd_alloc() without __GFP_REPEAT to avoid stalls
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: paranoid_entry pass cr3 need to paranoid_exit
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: x86_cr3_pcid_noflush and x86_cr3_pcid_user
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: PCID 0 for kernel and 128 for user
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: load_new_mm_cr3() let SWITCH_USER_CR3 flush user
> 
> Dave Hansen <dave.hansen@linux.intel.com>
>     kaiser: enhanced by kernel and user PCIDs
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: vmstat show NR_KAISERTABLE as nr_overhead
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: delete KAISER_REAL_SWITCH option
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: name that 0x1000 KAISER_SHADOW_PGD_OFFSET
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: cleanups while trying for gold link
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: kaiser_remove_mapping() move along the pgd
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: tidied up kaiser_add/remove_mapping slightly
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: tidied up asm/kaiser.h somewhat
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: ENOMEM if kaiser_pagetable_walk() NULL
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: fix perf crashes
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: fix regs to do_nmi() ifndef CONFIG_KAISER
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: KAISER depends on SMP
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: fix build and FIXME in alloc_ldt_struct()
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: stack map PAGE_SIZE at THREAD_SIZE-PAGE_SIZE
> 
> Hugh Dickins <hughd@google.com>
>     kaiser: do not set _PAGE_NX on pgd_none
> 
> Dave Hansen <dave.hansen@linux.intel.com>
>     kaiser: merged update
> 
> Richard Fellner <richard.fellner@student.tugraz.at>
>     KAISER: Kernel Address Isolation
> 
> Tom Lendacky <thomas.lendacky@amd.com>
>     x86/boot: Add early cmdline parsing for options with arguments
> 
> 
> -------------
> 
> Diffstat:
> 
>  Documentation/kernel-parameters.txt         |   8 +
>  Makefile                                    |   4 +-
>  arch/x86/boot/compressed/misc.h             |   1 +
>  arch/x86/entry/entry_64.S                   | 164 ++++++++--
>  arch/x86/entry/entry_64_compat.S            |   7 +
>  arch/x86/include/asm/cmdline.h              |   2 +
>  arch/x86/include/asm/cpufeature.h           |   4 +
>  arch/x86/include/asm/desc.h                 |   2 +-
>  arch/x86/include/asm/hw_irq.h               |   2 +-
>  arch/x86/include/asm/kaiser.h               | 141 +++++++++
>  arch/x86/include/asm/pgtable.h              |  28 +-
>  arch/x86/include/asm/pgtable_64.h           |  25 +-
>  arch/x86/include/asm/pgtable_types.h        |  29 +-
>  arch/x86/include/asm/processor.h            |   2 +-
>  arch/x86/include/asm/tlbflush.h             |  74 ++++-
>  arch/x86/include/uapi/asm/processor-flags.h |   3 +-
>  arch/x86/kernel/cpu/common.c                |  28 +-
>  arch/x86/kernel/cpu/perf_event_intel_ds.c   |  57 +++-
>  arch/x86/kernel/espfix_64.c                 |  10 +
>  arch/x86/kernel/head_64.S                   |  35 ++-
>  arch/x86/kernel/irqinit.c                   |   2 +-
>  arch/x86/kernel/ldt.c                       |  25 +-
>  arch/x86/kernel/paravirt_patch_64.c         |   2 -
>  arch/x86/kernel/process.c                   |   2 +-
>  arch/x86/kernel/setup.c                     |   7 +
>  arch/x86/kernel/tracepoint.c                |   2 +
>  arch/x86/kvm/x86.c                          |   3 +-
>  arch/x86/lib/cmdline.c                      | 105 +++++++
>  arch/x86/mm/Makefile                        |   1 +
>  arch/x86/mm/init.c                          |   2 +-
>  arch/x86/mm/init_64.c                       |  10 +
>  arch/x86/mm/kaiser.c                        | 455 ++++++++++++++++++++++++++++
>  arch/x86/mm/pageattr.c                      |  63 +++-
>  arch/x86/mm/pgtable.c                       |  16 +-
>  arch/x86/mm/tlb.c                           |  39 ++-
>  include/asm-generic/vmlinux.lds.h           |   7 +
>  include/linux/kaiser.h                      |  52 ++++
>  include/linux/mmzone.h                      |   3 +-
>  include/linux/percpu-defs.h                 |  32 +-
>  init/main.c                                 |   2 +
>  kernel/fork.c                               |   6 +
>  mm/vmstat.c                                 |   1 +
>  security/Kconfig                            |  10 +
>  43 files changed, 1375 insertions(+), 98 deletions(-)
> 
>

Not that my feedback will matter much on this release since Pixel 2 XL
is an arm64 device but merged, compiled, and flashed successfully.

The changes to kernel/fork.c had to be slightly adjusted for Google's
tree due to their addition of mainline commit b235beea9e99 ("Clarify
naming of thread info/stack allocators").

No noticeable issues in general use or dmesg.

Thanks!
Nathan