| From: |
| Peter Zijlstra <peterz-AT-infradead.org> |
| To: |
| x86-AT-kernel.org, alyssa.milburn-AT-linux.intel.com |
| Subject: |
| [PATCH v2 0/6] x86/cfi: Fix FineIBT |
| Date: |
| Thu, 22 Jun 2023 16:42:18 +0200 |
| Message-ID: |
| <20230622144218.860926475@infradead.org> |
| Cc: |
| linux-kernel-AT-vger.kernel.org, peterz-AT-infradead.org, samitolvanen-AT-google.com, keescook-AT-chromium.org, jpoimboe-AT-kernel.org, joao-AT-overdrivepizza.com, brgerst-AT-gmail.com |
| Archive-link: |
| Article |
Hi!
Alyssa reported a FineIBT issue (patch 6) which led to the discovery of
a kCFI issue (patch 5) and a bunch of cleanups and enhancements (the
rest).
Backports can probably suffice with just the last two.
Much thanks to Brian for the better ret_from_fork() cleanup.
Tested using llvm-16 on an Alderlake with both FineIBT and kCFI.
Also available at:
git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/urgent
(I'm aiming for the merge window, not this cycle)
v1: https://lkml.kernel.org/r/20230615193546.949657149@infrad...
---
arch/um/kernel/um_arch.c | 2 +-
arch/x86/entry/entry_32.S | 54 +++++++---------------------
arch/x86/entry/entry_64.S | 35 ++++++------------
arch/x86/include/asm/alternative.h | 2 +-
arch/x86/include/asm/ibt.h | 2 +-
arch/x86/include/asm/nospec-branch.h | 4 +++
arch/x86/include/asm/switch_to.h | 4 ++-
arch/x86/kernel/alternative.c | 69 +++++++++++++++++++++++++++++++++---
arch/x86/kernel/module.c | 2 +-
arch/x86/kernel/process.c | 22 +++++++++++-
10 files changed, 120 insertions(+), 76 deletions(-)
