From: Peter Zijlstra <peterz@infradead.org>
To: x86@kernel.org, alyssa.milburn@linux.intel.com
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
samitolvanen@google.com, keescook@chromium.org,
jpoimboe@kernel.org, joao@overdrivepizza.com, brgerst@gmail.com
Subject: [PATCH v2 0/6] x86/cfi: Fix FineIBT
Date: Thu, 22 Jun 2023 16:42:18 +0200 [thread overview]
Message-ID: <20230622144218.860926475@infradead.org> (raw)
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@infradead.org
---
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(-)
next reply other threads:[~2023-06-22 14:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-22 14:42 Peter Zijlstra [this message]
2023-06-22 14:42 ` [PATCH v2 1/6] x86/cfi: Extend {JMP,CAKK}_NOSPEC comment Peter Zijlstra
2023-06-22 14:42 ` [PATCH v2 2/6] x86/alternative: Rename apply_ibt_endbr() Peter Zijlstra
2023-06-22 14:42 ` [PATCH v2 3/6] x86/cfi: Extend ENDBR sealing to kCFI Peter Zijlstra
2023-06-22 14:42 ` [PATCH v2 4/6] x86/32: Remove schedule_tail_wrapper() Peter Zijlstra
2023-06-22 14:42 ` [PATCH v2 5/6] x86: Rewrite ret_from_fork() in C Peter Zijlstra
2023-06-22 14:42 ` [PATCH v2 6/6] x86/fineibt: Poison ENDBR at +0 Peter Zijlstra
2023-06-22 16:14 ` [PATCH v2 0/6] x86/cfi: Fix FineIBT Kees Cook
2023-06-23 0:20 ` Sami Tolvanen
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