linux-kernel - Re: [PATCH] ref_tracker: use %p instead of %px in debugfs dentry name

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Message-ID: <20250731071355.2da07d06@kernel.org>
Date: Thu, 31 Jul 2025 07:13:55 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Jeff Layton <jlayton@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>, Eric Dumazet
 <edumazet@...gle.com>, Kees Cook <kees@...nel.org>,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ref_tracker: use %p instead of %px in debugfs dentry
 name

On Thu, 31 Jul 2025 07:57:05 -0400 Jeff Layton wrote:
> As Kees points out, this is a kernel address leak, and debugging is
> not a sufficiently good reason to expose the real kernel address.
> 
> Fixes: 65b584f53611 ("ref_tracker: automatically register a file in debugfs for a ref_tracker_dir")
> Reported-by: Kees Cook <kees@...nel.org>
> Closes: https://lore.kernel.org/netdev/202507301603.62E553F93@keescook/
> Signed-off-by: Jeff Layton <jlayton@...nel.org>
> ---
> I trust that Kees is right here, so let's go ahead and fix this. I gave
> this a quick build and boot this morning and it did the right thing.

Assuming Andrew will take this one since you haven't cced netdev@ ..