From: Masami Hiramatsu <mhiramat@kernel.org>
To: Ingo Molnar <mingo@kernel.org>, David Woodhouse <dwmw@amazon.co.uk>
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
linux-kernel@vger.kernel.org, Andi Kleen <ak@linux.intel.com>,
Greg Kroah-Hartman <gregkh@linux-foundation.org>,
Arjan van de Ven <arjan@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
"H . Peter Anvin" <hpa@zytor.com>
Subject: [PATCH v2 tip/master 0/3] kprobes/x86: retpoline: Fix kprobes for retpoline
Date: Fri, 19 Jan 2018 01:13:57 +0900 [thread overview]
Message-ID: <151629203720.10241.17490679760505352230.stgit@devbox> (raw)
Hi,
This is the 2nd version of the series to fix kprobes issues
on the kernel with CONFIG_RETPOLINE=y.
- [1/3]: This introduces __x86_indirect_thunk_* boundary
symbols so that kprobes easily identify those functions.
- [2/3]: Mark __x86_indirect_thunk_* as blacklisted function
for kprobes, since it can be called from other
blacklisted functions.
- [3/3]: Check jmp instructions in the probe target function
whether it jumps into the __x86_indirect_thunk_*,
because it is equal to an indirect jump instruction.
In this version, just [1/3] has been changed according to
David Woodhouse's comment.
[1/3]: Consolidate .text.__x86.indirect_thunk.* sections
to .text.__x86.indirect_thunk section.
Thank you,
---
Masami Hiramatsu (3):
retpoline: Introduce start/end markers of indirect thunk
kprobes/x86: Blacklist indirect thunk functions for kprobes
kprobes/x86: Disable optimizing on the function jumps to indirect thunk
arch/x86/include/asm/nospec-branch.h | 3 +++
arch/x86/kernel/kprobes/opt.c | 23 ++++++++++++++++++++++-
arch/x86/kernel/vmlinux.lds.S | 6 ++++++
arch/x86/lib/retpoline.S | 5 +++--
4 files changed, 34 insertions(+), 3 deletions(-)
--
Masami Hiramatsu (Linaro) <mhiramat@kernel.org>
next reply other threads:[~2018-01-18 16:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-18 16:13 Masami Hiramatsu [this message]
2018-01-18 16:14 ` [PATCH v2 tip/master 1/3] retpoline: Introduce start/end markers of indirect thunk Masami Hiramatsu
2018-01-19 15:47 ` [tip:x86/pti] " tip-bot for Masami Hiramatsu
2018-01-18 16:14 ` [PATCH v2 tip/master 2/3] kprobes/x86: Blacklist indirect thunk functions for kprobes Masami Hiramatsu
2018-01-19 15:47 ` [tip:x86/pti] " tip-bot for Masami Hiramatsu
2018-01-18 16:15 ` [PATCH v2 tip/master 3/3] kprobes/x86: Disable optimizing on the function jumps to indirect thunk Masami Hiramatsu
2018-01-19 15:48 ` [tip:x86/pti] " tip-bot for Masami Hiramatsu
2018-01-19 9:03 ` [PATCH v2 tip/master 0/3] kprobes/x86: retpoline: Fix kprobes for retpoline David Woodhouse
2018-01-19 9:03 ` David Woodhouse
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=151629203720.10241.17490679760505352230.stgit@devbox \
--to=mhiramat@kernel.org \
--cc=ak@linux.intel.com \
--cc=ananth@linux.vnet.ibm.com \
--cc=arjan@linux.intel.com \
--cc=dwmw@amazon.co.uk \
--cc=gregkh@linux-foundation.org \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.