linux-kernel - [GIT PULL] probes: Fixes for v6.7

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Message-Id: <20240105001858.865e3794558a326e146e9c3a@kernel.org>
Date: Fri, 5 Jan 2024 00:18:58 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Jinghao Jia <jinghao7@...inois.edu>, Steven Rostedt
 <rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>,
 linux-kernel@...r.kernel.org
Subject: [GIT PULL] probes: Fixes for v6.7

Hi Linus,

Probes fixes for 6.7-rc8:

- Kprobes/x86: Fix to emulate indirect call which size is not 5 byte.
   Current code expects the indirect call instructions are 5 bytes, but
   that is incorrect. Usually indirect call based on register is shorter
   than that, thus the emulation causes a kernel crash by accessing
   wrong instruction boundary. This uses the instruction size to
   calculate the return address correctly.


Please pull the latest probes-fixes-v6.7-rc8 tree, which can be found at:


  git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
probes-fixes-v6.7-rc8

Tag SHA1: 71ce71c6c329bd3f2ba52bb0a7373f23d8da8f59
Head SHA1: f5d03da48d062966c94f0199d20be0b3a37a7982


Jinghao Jia (1):
      x86/kprobes: fix incorrect return address calculation in kprobe_emulate_call_indirect

----
 arch/x86/kernel/kprobes/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>