6.4.1-rc2 review

This is the start of the stable review cycle for the 6.4.1 release. There are 29 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 Sun, 02 Jul 2023 05:56:14 +0000. Anything received after that time might be too late.

The whole patch series can be found in one patch at:

	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.4.1-rc2.gz

or in the git tree and branch at:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.4.y
and the diffstat can be found below.

thanks,

greg k-h

-------------
Pseudo-Shortlog of commits:

Greg Kroah-Hartman <[email protected]>

    Linux 6.4.1-rc2

Linus Torvalds <[email protected]>
sparc32: fix lock_mm_and_find_vma() conversion

Ricardo Cañuelo <[email protected]>
Revert "thermal/drivers/mediatek: Use devm_of_iomap to avoid resource leak in mtk_thermal_probe"

Mike Hommey <[email protected]>
HID: logitech-hidpp: add HIDPP_QUIRK_DELAYED_INIT for the T651.

Ludvig Michaelsson <[email protected]>
HID: hidraw: fix data race on device refcount

Zhang Shurong <[email protected]>
fbdev: fix potential OOB read in fast_imageblit()

Hugh Dickins <[email protected]>
mm/khugepaged: fix regression in collapse_file()

Linus Torvalds <[email protected]>
gup: add warning if some caller would seem to want stack expansion

Jason Gerecke <[email protected]>
HID: wacom: Use ktime_t rather than int when dealing with timestamps

Linus Torvalds <[email protected]>
mm: always expand the stack with the mmap write lock held

Linus Torvalds <[email protected]>
execve: expand new process stack manually ahead of time

Liam R. Howlett <[email protected]>
mm: make find_extend_vma() fail if write lock not held

Linus Torvalds <[email protected]>
powerpc/mm: convert coprocessor fault to lock_mm_and_find_vma()

Linus Torvalds <[email protected]>
mm/fault: convert remaining simple cases to lock_mm_and_find_vma()

Ben Hutchings <[email protected]>
arm/mm: Convert to using lock_mm_and_find_vma()

Ben Hutchings <[email protected]>
riscv/mm: Convert to using lock_mm_and_find_vma()

Ben Hutchings <[email protected]>
mips/mm: Convert to using lock_mm_and_find_vma()

Michael Ellerman <[email protected]>
powerpc/mm: Convert to using lock_mm_and_find_vma()

Linus Torvalds <[email protected]>
arm64/mm: Convert to using lock_mm_and_find_vma()

Linus Torvalds <[email protected]>
mm: make the page fault mmap locking killable

Linus Torvalds <[email protected]>
mm: introduce new 'lock_mm_and_find_vma()' page fault helper

Peng Zhang <[email protected]>
maple_tree: fix potential out-of-bounds access in mas_wr_end_piv()

Oliver Hartkopp <[email protected]>
can: isotp: isotp_sendmsg(): fix return error fix on TX path

Wyes Karny <[email protected]>
cpufreq: amd-pstate: Make amd-pstate EPP driver name hyphenated

Thomas Gleixner <[email protected]>
x86/smp: Cure kexec() vs. mwait_play_dead() breakage

Thomas Gleixner <[email protected]>
x86/smp: Use dedicated cache-line for mwait_play_dead()

Thomas Gleixner <[email protected]>
x86/smp: Remove pointless wmb()s from native_stop_other_cpus()

Tony Battersby <[email protected]>
x86/smp: Dont access non-existing CPUID leaf

Thomas Gleixner <[email protected]>
x86/smp: Make stop_other_cpus() more robust

Borislav Petkov (AMD) <[email protected]>
x86/microcode/AMD: Load late on both threads too

-------------

Diffstat:

 Makefile                                  |   4 +-
 arch/alpha/Kconfig                        |   1 +
 arch/alpha/mm/fault.c                     |  13 +--
 arch/arc/Kconfig                          |   1 +
 arch/arc/mm/fault.c                       |  11 +--
 arch/arm/Kconfig                          |   1 +
 arch/arm/mm/fault.c                       |  63 ++++-----------
 arch/arm64/Kconfig                        |   1 +
 arch/arm64/mm/fault.c                     |  47 ++---------
 arch/csky/Kconfig                         |   1 +
 arch/csky/mm/fault.c                      |  22 ++----
 arch/hexagon/Kconfig                      |   1 +
 arch/hexagon/mm/vm_fault.c                |  18 +----
 arch/ia64/mm/fault.c                      |  36 ++-------
 arch/loongarch/Kconfig                    |   1 +
 arch/loongarch/mm/fault.c                 |  16 ++--
 arch/m68k/mm/fault.c                      |   9 ++-
 arch/microblaze/mm/fault.c                |   5 +-
 arch/mips/Kconfig                         |   1 +
 arch/mips/mm/fault.c                      |  12 +--
 arch/nios2/Kconfig                        |   1 +
 arch/nios2/mm/fault.c                     |  17 +---
 arch/openrisc/mm/fault.c                  |   5 +-
 arch/parisc/mm/fault.c                    |  23 +++---
 arch/powerpc/Kconfig                      |   1 +
 arch/powerpc/mm/copro_fault.c             |  14 +---
 arch/powerpc/mm/fault.c                   |  39 +--------
 arch/riscv/Kconfig                        |   1 +
 arch/riscv/mm/fault.c                     |  31 +++-----
 arch/s390/mm/fault.c                      |   5 +-
 arch/sh/Kconfig                           |   1 +
 arch/sh/mm/fault.c                        |  17 +---
 arch/sparc/Kconfig                        |   1 +
 arch/sparc/mm/fault_32.c                  |  32 ++------
 arch/sparc/mm/fault_64.c                  |   8 +-
 arch/um/kernel/trap.c                     |  11 +--
 arch/x86/Kconfig                          |   1 +
 arch/x86/include/asm/cpu.h                |   2 +
 arch/x86/include/asm/smp.h                |   2 +
 arch/x86/kernel/cpu/microcode/amd.c       |   2 +-
 arch/x86/kernel/process.c                 |  28 ++++++-
 arch/x86/kernel/smp.c                     |  73 ++++++++++-------
 arch/x86/kernel/smpboot.c                 |  81 ++++++++++++++++---
 arch/x86/mm/fault.c                       |  52 +-----------
 arch/xtensa/Kconfig                       |   1 +
 arch/xtensa/mm/fault.c                    |  14 +---
 drivers/cpufreq/amd-pstate.c              |   2 +-
 drivers/hid/hid-logitech-hidpp.c          |   2 +-
 drivers/hid/hidraw.c                      |   9 ++-
 drivers/hid/wacom_wac.c                   |   6 +-
 drivers/hid/wacom_wac.h                   |   2 +-
 drivers/iommu/amd/iommu_v2.c              |   4 +-
 drivers/iommu/iommu-sva.c                 |   2 +-
 drivers/thermal/mediatek/auxadc_thermal.c |  14 +---
 drivers/video/fbdev/core/sysimgblt.c      |   2 +-
 fs/binfmt_elf.c                           |   6 +-
 fs/exec.c                                 |  38 +++++----
 include/linux/mm.h                        |  16 ++--
 lib/maple_tree.c                          |  11 +--
 mm/Kconfig                                |   4 +
 mm/gup.c                                  |  14 +++-
 mm/khugepaged.c                           |   7 +-
 mm/memory.c                               | 127 ++++++++++++++++++++++++++++++
 mm/mmap.c                                 | 121 ++++++++++++++++++++++++----
 mm/nommu.c                                |  17 ++--
 net/can/isotp.c                           |   5 +-
 66 files changed, 605 insertions(+), 531 deletions(-)

Did you decide to take that one after all?

It's not exactly wrong, and it might help find any odd cases, but I do suspect you can get syzbot etc to trigger the warning. It's designed to find crazy users, and syzbot is - pretty much by definition and by design - one of the craziest out there.

Linus

For now, yes.

I think the "crazy users" reports might be triggered sooner with stable updates than from your tree as well, so this might be a early-warning type system. I am pretty sure at least one "distro" has enabled it in their kernel already as well.

But if this starts triggering a bunch of warnings, and they are causing problems, I'll drop it (and recommend you revert it in your tree too.)

I wanted to be "warning compatible" here for now to ensure the backports were working properly.

thanks,

greg k-h

Yeah, I agree, it might help find any potential odd cases more quickly.

So just as long as you are aware of the false positives by syzbot and friends..

Linus