From: patchwork-bot+linux-riscv@kernel.org
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,
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linux-s390@vger.kernel.org
Subject: Re: [PATCH v3] kprobe/ftrace: bail out if ftrace was killed
Date: Wed, 22 May 2024 23:32:23 +0000 [thread overview]
Message-ID: <171642074348.9409.15455041633304152397.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20240501162956.229427-1-stephen.s.brennan@oracle.com>
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.
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prev parent reply other threads:[~2024-05-22 23:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-01 16:29 [PATCH v3] kprobe/ftrace: bail out if ftrace was killed Stephen Brennan
2024-05-01 17:24 ` Steven Rostedt
2024-05-01 17:35 ` Guo Ren
2024-05-02 2:03 ` Masami Hiramatsu
2024-05-15 22:18 ` Stephen Brennan
2024-05-16 0:23 ` Masami Hiramatsu
2024-05-06 14:46 ` Christophe Leroy
2024-05-06 22:50 ` Steven Rostedt
2024-05-07 18:36 ` Stephen Brennan
2024-05-22 23:32 ` patchwork-bot+linux-riscv [this message]
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