Received-SPF: pass (google.com: domain of linux-kernel+bounces-186820-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
Content-Type: text/plain; charset="utf-8"
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Subject: Re: [PATCH v3] kprobe/ftrace: bail out if ftrace was killed
From: patchwork-bot+linux-riscv@kernel.org
Message-Id: 
 <171642074348.9409.15455041633304152397.git-patchwork-notify@kernel.org>
Date: Wed, 22 May 2024 23:32:23 +0000
References: <20240501162956.229427-1-stephen.s.brennan@oracle.com>
In-Reply-To: <20240501162956.229427-1-stephen.s.brennan@oracle.com>
To: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: linux-riscv@lists.infradead.org, rostedt@goodmis.org, mhiramat@kernel.org,
 mark.rutland@arm.com, guoren@kernel.org, chenhuacai@kernel.org,
 kernel@xen0n.name, James.Bottomley@HansenPartnership.com, deller@gmx.de,
 mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu,
 aneesh.kumar@kernel.org, naveen.n.rao@linux.ibm.com,
 paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu,
 hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com,
 borntraeger@linux.ibm.com, svens@linux.ibm.com, tglx@linutronix.de,
 mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org,
 hpa@zytor.com, linux-kernel@vger.kernel.org,
 linux-trace-kernel@vger.kernel.org, linux-csky@vger.kernel.org,
 loongarch@lists.linux.dev, linux-parisc@vger.kernel.org,
 linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org

Hello:

This patch was applied to riscv/linux.git (fixes)
by Masami Hiramatsu (Google) <mhiramat@kernel.org>:

On Wed,  1 May 2024 09:29:56 -0700 you wrote:
> If an error happens in ftrace, ftrace_kill() will prevent disarming
> kprobes. Eventually, the ftrace_ops associated with the kprobes will be
> freed, yet the kprobes will still be active, and when triggered, they
> will use the freed memory, likely resulting in a page fault and panic.
> 
> This behavior can be reproduced quite easily, by creating a kprobe and
> then triggering a ftrace_kill(). For simplicity, we can simulate an
> ftrace error with a kernel module like [1]:
> 
> [...]

Here is the summary with links:
  - [v3] kprobe/ftrace: bail out if ftrace was killed
    https://git.kernel.org/riscv/c/1a7d0890dd4a

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html