From: Josh Poimboeuf <jpoimboe@redhat.com>
To: live-patching@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Jessica Yu <jeyu@kernel.org>,
Joe Lawrence <joe.lawrence@redhat.com>,
Miroslav Benes <mbenes@suse.cz>
Subject: [PATCH v4 00/11] livepatch,module: Remove .klp.arch and module_disable_ro()
Date: Wed, 29 Apr 2020 10:24:42 -0500 [thread overview]
Message-ID: <cover.1588173720.git.jpoimboe@redhat.com> (raw)
v4:
- Fixed rebase bisection regression [Miroslav]
- Made module_enable_ro() static [Jessica]
- Added Acked-by's
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 (only for static keys
which live in vmlinux).
- 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 (8):
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()
module: Make module_enable_ro() static again
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 | 8 -
kernel/livepatch/core.c | 177 +++++++++++-------
kernel/module.c | 27 +--
12 files changed, 279 insertions(+), 236 deletions(-)
delete mode 100644 arch/x86/kernel/livepatch.c
--
2.21.1
next reply other threads:[~2020-04-29 15:25 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-29 15:24 Josh Poimboeuf [this message]
2020-04-29 15:24 ` [PATCH v4 01/11] livepatch: Disallow vmlinux.ko Josh Poimboeuf
2020-04-29 15:24 ` [PATCH v4 02/11] livepatch: Apply vmlinux-specific KLP relocations early Josh Poimboeuf
2020-04-29 15:24 ` [PATCH v4 03/11] livepatch: Remove .klp.arch Josh Poimboeuf
2020-04-29 15:24 ` [PATCH v4 04/11] livepatch: Prevent module-specific KLP rela sections from referencing vmlinux symbols Josh Poimboeuf
2020-04-29 15:24 ` [PATCH v4 05/11] s390: Change s390_kernel_write() return type to match memcpy() Josh Poimboeuf
2020-05-07 13:36 ` Jiri Kosina
2020-05-07 16:01 ` Gerald Schaefer
2020-04-29 15:24 ` [PATCH v4 06/11] s390/module: Use s390_kernel_write() for late relocations Josh Poimboeuf
2020-05-07 10:00 ` Jiri Kosina
2020-05-07 12:27 ` Gerald Schaefer
2020-04-29 15:24 ` [PATCH v4 07/11] x86/module: Use text_poke() " Josh Poimboeuf
2020-04-29 15:24 ` [PATCH v4 08/11] livepatch: Remove module_disable_ro() usage Josh Poimboeuf
2020-04-29 15:24 ` [PATCH v4 09/11] module: Remove module_disable_ro() Josh Poimboeuf
2020-04-29 15:24 ` [PATCH v4 10/11] x86/module: Use text_mutex in apply_relocate_add() Josh Poimboeuf
2020-04-29 15:24 ` [PATCH v4 11/11] module: Make module_enable_ro() static again Josh Poimboeuf
2020-04-30 11:10 ` Jessica Yu
2020-04-30 11:35 ` Miroslav Benes
2020-04-30 11:40 ` Jessica Yu
2020-04-30 12:23 ` Jessica Yu
2020-06-05 13:24 ` Guenter Roeck
2020-06-05 14:20 ` Jessica Yu
2020-06-05 14:39 ` Josh Poimboeuf
2020-04-30 11:33 ` [PATCH v4 00/11] livepatch,module: Remove .klp.arch and module_disable_ro() Jessica Yu
2020-05-04 22:20 ` Jiri Kosina
2020-05-07 22:17 ` Jiri Kosina
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