linux-kernel - Re: [PATCH] tracing: Fix possible crash in ftrace_free_ftrace

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Message-ID: <20220509185447.0e2b6a39@gandalf.local.home>
Date:   Mon, 9 May 2022 18:54:47 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Jeff Xie <xiehuan09@...il.com>
Cc:     mingo@...hat.com, Masami Hiramatsu <mhiramat@...nel.org>,
        Tom Zanussi <zanussi@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tracing: Fix possible crash in ftrace_free_ftrace_ops()

On Mon, 9 May 2022 09:33:44 +0800
Jeff Xie <xiehuan09@...il.com> wrote:

> I am so sorry to bother you, this may be an invalid patch, kfree can
> return directly from null. ;-)

Yes, and so does free() in user space glibc.

-- Steve