linux-kernel - Re: [RFC PATCH 3/3] module: pre-test setting ro_after

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZzO6cNo2MalF92OV@bombadil.infradead.org>
Date: Tue, 12 Nov 2024 12:28:32 -0800
From: Luis Chamberlain <mcgrof@...nel.org>
To: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: Petr Pavlu <petr.pavlu@...e.com>,
	Sami Tolvanen <samitolvanen@...gle.com>,
	Daniel Gomez <da.gomez@...sung.com>, Kees Cook <kees@...nel.org>,
	linux-modules@...r.kernel.org, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC PATCH 3/3] module: pre-test setting ro_after_init data
 read-only

On Sat, Nov 09, 2024 at 11:35:37AM +0100, Christophe Leroy wrote:
> diff --git a/kernel/module/main.c b/kernel/module/main.c
> index 1bf4b0db291b..b603c9647e73 100644
> --- a/kernel/module/main.c
> +++ b/kernel/module/main.c
> @@ -2582,7 +2582,7 @@ static noinline int do_init_module(struct module *mod)
>  	rcu_assign_pointer(mod->kallsyms, &mod->core_kallsyms);
>  #endif
>  	ret = module_enable_rodata_ro_after_init(mod);
> -	if (ret)
> +	if (WARN_ON_ONCE(ret))

Do we want panic on warn systems to crash with this?

  Luis