linux-kernel - [GIT PULL] probes: Fixes for 6.4-rc1

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Date:   Thu, 18 May 2023 22:44:09 +0900
From:   Masami Hiramatsu (Google) <mhiramat@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Masami Hiramatsu (Google) <mhiramat@...nel.org>,
        Ze Gao <zegao2021@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [GIT PULL] probes: Fixes for 6.4-rc1

Hi Linus,

Probes fixes for 6.4-rc1:

- Initialize 'ret' local variables on fprobe_handler() to fix the smatch
  warning. With this, fprobe function exit handler is not working
  randomly.

- Fix to use preempt_enable/disable_notrace for rethook handler to
  prevent recursive call of fprobe exit handler (which is based on
  rethook)

- Fix recursive call issue on fprobe_kprobe_handler().

- Fix to detect recursive call on fprobe_exit_handler().

- Fix to make all arch-dependent rethook code notrace.
  (the arch-independent code is already notrace)


Please pull the latest probes-fixes-v6.4-rc1 tree, which can be found at:


  git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
probes-fixes-v6.4-rc1

Tag SHA1: edaa9b59161d819661ea96a97850d9aaf6d43bdc
Head SHA1: 571a2a50a8fc546145ffd3bf673547e9fe128ed2


Masami Hiramatsu (Google) (1):
      tracing: fprobe: Initialize ret valiable to fix smatch error

Ze Gao (4):
      rethook: use preempt_{disable, enable}_notrace in rethook_trampoline_handler
      fprobe: make fprobe_kprobe_handler recursion free
      fprobe: add recursion detection in fprobe_exit_handler
      rethook, fprobe: do not trace rethook related functions

----
 arch/riscv/kernel/probes/Makefile |  2 ++
 arch/s390/kernel/Makefile         |  1 +
 arch/x86/kernel/Makefile          |  1 +
 kernel/trace/fprobe.c             | 73 +++++++++++++++++++++++++++++++--------
 kernel/trace/rethook.c            |  4 +--
 5 files changed, 64 insertions(+), 17 deletions(-)


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