linux-kernel - [GIT PULL] probes: Fixes for v6.12-rc4-2

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Message-Id: <20241023233600.d309ab5fa8421e97d041bbc0@kernel.org>
Date: Wed, 23 Oct 2024 23:36:00 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Leo Yan <leo.yan@....com>, Mikel Rychliski <mikel@...elr.com>, Viktor
 Malik <vmalik@...hat.com>, Steven Rostedt <rostedt@...dmis.org>,
 linux-kernel@...r.kernel.org, Masami Hiramatsu <mhiramat@...nel.org>
Subject: [GIT PULL] probes: Fixes for v6.12-rc4-2

Hi Linus,

Probes fixes for v6.12-rc4(2):

- objpool: Fix choosing allocation for percpu slots
  Fixes to allocate objpool's percpu slots correctly according to the
  GFP flag. It checks whether "any bit" in GFP_ATOMIC is set to choose
  the vmalloc source, but it should check "all bits" in GFP_ATOMIC flag
  is set, because GFP_ATOMIC is a combined flag.

- tracing/probes: Fix MAX_TRACE_ARGS limit handling
  If more than MAX_TRACE_ARGS are passed for creating a probe event, the
  entries over MAX_TRACE_ARG in trace_arg array are not initialized.
  Thus if the kernel accesses those entries, it crashes. This rejects
  creating event if the number of arguments is over MAX_TRACE_ARGS.

- tracing: Consider the NULL character when validating the event length
  A strlen() is used when parsing the event name, and the original code
  does not consider the terminal null byte. Thus it can pass the name
  1 byte longer than the buffer. This fixes to check it correctly.


Please pull the latest probes-fixes-v6.12-rc4.2 tree, which can be found at:


  git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
probes-fixes-v6.12-rc4.2

Tag SHA1: 62eeda86599cd8c8fe92b4bc6181ef6d2c1e6e03
Head SHA1: 0b6e2e22cb23105fcb171ab92f0f7516c69c8471


Leo Yan (1):
      tracing: Consider the NULL character when validating the event length

Mikel Rychliski (1):
      tracing/probes: Fix MAX_TRACE_ARGS limit handling

Viktor Malik (1):
      objpool: fix choosing allocation for percpu slots

----
 kernel/trace/trace_eprobe.c | 7 ++++++-
 kernel/trace/trace_fprobe.c | 6 +++++-
 kernel/trace/trace_kprobe.c | 6 +++++-
 kernel/trace/trace_probe.c  | 2 +-
 kernel/trace/trace_uprobe.c | 4 +++-
 lib/objpool.c               | 2 +-
 6 files changed, 21 insertions(+), 6 deletions(-)

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