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* [PATCH v3 00/10] livepatch,module: Remove .klp.arch and module_disable_ro()
@ 2020-04-25 11:07 Josh Poimboeuf
  2020-04-25 11:07 ` [PATCH v3 01/10] livepatch: Disallow vmlinux.ko Josh Poimboeuf
                   ` (11 more replies)
  0 siblings, 12 replies; 23+ messages in thread
From: Josh Poimboeuf @ 2020-04-25 11:07 UTC (permalink / raw)
  To: live-patching; +Cc: linux-kernel, Peter Zijlstra, Jessica Yu, Joe Lawrence

v3:
- klp: split klp_write_relocations() into object/section specific
  functions [joe]
- s390: fix plt/got writes [joe]
- s390: remove text_mutex usage [mbenes]
- x86: do text_poke_sync() before releasing text_mutex [peterz]
- split x86 text_mutex changes into separate patch [mbenes]

v2:
- add vmlinux.ko check [peterz]
- remove 'klp_object' forward declaration [mbenes]
- use text_mutex [jeyu]
- fix documentation TOC [jeyu]
- fix s390 issues [mbenes]
- upstream kpatch-build now supports this
  (though it's only enabled for Linux >= 5.8)

These patches add simplifications and improvements for some issues Peter
found six months ago, as part of his non-writable text code (W^X)
cleanups.

Highlights:

- Remove the livepatch arch-specific .klp.arch sections, which were used
  to do paravirt patching and alternatives patching for livepatch
  replacement code.

- Add support for jump labels in patched code.

- Remove the last module_disable_ro() usage.

For more background, see this thread:

  https://lkml.kernel.org/r/20191021135312.jbbxsuipxldocdjk@treble

This has been tested with kpatch-build integration tests and klp-convert
selftests.

Josh Poimboeuf (7):
  livepatch: Disallow vmlinux.ko
  livepatch: Apply vmlinux-specific KLP relocations early
  livepatch: Prevent module-specific KLP rela sections from referencing
    vmlinux symbols
  s390: Change s390_kernel_write() return type to match memcpy()
  livepatch: Remove module_disable_ro() usage
  module: Remove module_disable_ro()
  x86/module: Use text_mutex in apply_relocate_add()

Peter Zijlstra (3):
  livepatch: Remove .klp.arch
  s390/module: Use s390_kernel_write() for late relocations
  x86/module: Use text_poke() for late relocations

 Documentation/livepatch/module-elf-format.rst |  15 +-
 arch/s390/include/asm/uaccess.h               |   2 +-
 arch/s390/kernel/module.c                     | 147 +++++++++------
 arch/s390/mm/maccess.c                        |   9 +-
 arch/um/kernel/um_arch.c                      |  16 ++
 arch/x86/kernel/Makefile                      |   1 -
 arch/x86/kernel/livepatch.c                   |  53 ------
 arch/x86/kernel/module.c                      |  43 ++++-
 include/linux/livepatch.h                     |  17 +-
 include/linux/module.h                        |   2 -
 kernel/livepatch/core.c                       | 177 +++++++++++-------
 kernel/module.c                               |  23 +--
 12 files changed, 277 insertions(+), 228 deletions(-)
 delete mode 100644 arch/x86/kernel/livepatch.c

-- 
2.21.1


^ permalink raw reply	[flat|nested] 23+ messages in thread

end of thread, other threads:[~2020-04-28 18:56 UTC | newest]

Thread overview: 23+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-04-25 11:07 [PATCH v3 00/10] livepatch,module: Remove .klp.arch and module_disable_ro() Josh Poimboeuf
2020-04-25 11:07 ` [PATCH v3 01/10] livepatch: Disallow vmlinux.ko Josh Poimboeuf
2020-04-25 11:07 ` [PATCH v3 02/10] livepatch: Apply vmlinux-specific KLP relocations early Josh Poimboeuf
2020-04-28  9:20   ` Miroslav Benes
2020-04-25 11:07 ` [PATCH v3 03/10] livepatch: Remove .klp.arch Josh Poimboeuf
2020-04-25 11:07 ` [PATCH v3 04/10] livepatch: Prevent module-specific KLP rela sections from referencing vmlinux symbols Josh Poimboeuf
2020-04-25 11:07 ` [PATCH v3 05/10] s390: Change s390_kernel_write() return type to match memcpy() Josh Poimboeuf
2020-04-25 11:07 ` [PATCH v3 06/10] s390/module: Use s390_kernel_write() for late relocations Josh Poimboeuf
2020-04-25 11:14   ` Josh Poimboeuf
2020-04-25 11:07 ` [PATCH v3 07/10] x86/module: Use text_poke() " Josh Poimboeuf
2020-04-25 11:07 ` [PATCH v3 08/10] livepatch: Remove module_disable_ro() usage Josh Poimboeuf
2020-04-25 11:07 ` [PATCH v3 09/10] module: Remove module_disable_ro() Josh Poimboeuf
2020-04-28 16:25   ` Jessica Yu
2020-04-28 16:36     ` Josh Poimboeuf
2020-04-28 16:41       ` Jessica Yu
2020-04-28 17:03         ` Josh Poimboeuf
2020-04-28 18:56           ` Jessica Yu
2020-04-25 11:07 ` [PATCH v3 10/10] x86/module: Use text_mutex in apply_relocate_add() Josh Poimboeuf
2020-04-27 12:22 ` [PATCH v3 00/10] livepatch,module: Remove .klp.arch and module_disable_ro() Joe Lawrence
2020-04-27 12:32   ` Miroslav Benes
2020-04-27 16:52   ` Joe Lawrence
2020-04-28 13:48 ` Miroslav Benes
2020-04-28 14:35   ` Josh Poimboeuf

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