linux-kernel - Re: [PATCH] binfmt: replace deprecated strncpy with strscpy

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Date: Thu, 21 Mar 2024 12:57:21 -0700
From: Justin Stitt <justinstitt@...gle.com>
To: "Eric W. Biederman" <ebiederm@...ssion.com>
Cc: Alexander Viro <viro@...iv.linux.org.uk>, Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>, 
	Kees Cook <keescook@...omium.org>, linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] binfmt: replace deprecated strncpy with strscpy_pad

Hi,

On Thu, Mar 21, 2024 at 9:23 AM Eric W. Biederman <ebiederm@...ssion.com> wrote:
>
> I am perplexed.  Why not use get_task_comm fill_psinfo like binfmt_elf
> does?
>
> It seems very silly to copy half the function without locking and then
> not copy it's locking as well.
>
> Given that the more highly tested binfmt_elf uses get_task_comm I can't
> imagine a reason why binfmt_elf_fdpic can't use it as well.

I am not sure why the original opted for strncpy over get_task_comm
but I made the replacement without being aware of the literally
identical code present in binfmt_elf.c

I'll send a v2.

>
> Eric

Thanks
Justin