[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Sat, 2 Oct 2021 18:04:10 +0000
From: Al Viro <viro@...iv.linux.org.uk>
To: Alexander Popov <alex.popov@...ux.com>
Cc: Jonathan Corbet <corbet@....net>, Paul McKenney <paulmck@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Thomas Gleixner <tglx@...utronix.de>,
Peter Zijlstra <peterz@...radead.org>,
Joerg Roedel <jroedel@...e.de>, Maciej Rozycki <macro@...am.me.uk>,
Muchun Song <songmuchun@...edance.com>,
Viresh Kumar <viresh.kumar@...aro.org>,
Robin Murphy <robin.murphy@....com>,
Randy Dunlap <rdunlap@...radead.org>,
Lu Baolu <baolu.lu@...ux.intel.com>, Petr Mladek <pmladek@...e.com>,
Kees Cook <keescook@...omium.org>,
Luis Chamberlain <mcgrof@...nel.org>, Wei Liu <wl@....org>,
John Ogness <john.ogness@...utronix.de>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Alexey Kardashevskiy <aik@...abs.ru>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Jann Horn <jannh@...gle.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mark Rutland <mark.rutland@....com>,
Andy Lutomirski <luto@...nel.org>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Steven Rostedt <rostedt@...dmis.org>,
Thomas Garnier <thgarnie@...gle.com>,
Will Deacon <will.deacon@....com>,
Ard Biesheuvel <ard.biesheuvel@...aro.org>,
Laura Abbott <labbott@...hat.com>,
David S Miller <davem@...emloft.net>,
Borislav Petkov <bp@...en8.de>, kernel-hardening@...ts.openwall.com,
linux-hardening@...r.kernel.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, notify@...nel.org
Subject: Re: [PATCH] Introduce the pkill_on_warn boot parameter
On Wed, Sep 29, 2021 at 09:58:23PM +0300, Alexander Popov wrote:
> --- a/kernel/panic.c
> +++ b/kernel/panic.c
> @@ -53,6 +53,7 @@ static int pause_on_oops_flag;
> static DEFINE_SPINLOCK(pause_on_oops_lock);
> bool crash_kexec_post_notifiers;
> int panic_on_warn __read_mostly;
> +int pkill_on_warn __read_mostly;
> unsigned long panic_on_taint;
> bool panic_on_taint_nousertaint = false;
>
> @@ -610,6 +611,9 @@ void __warn(const char *file, int line, void *caller, unsigned taint,
>
> print_oops_end_marker();
>
> + if (pkill_on_warn && system_state >= SYSTEM_RUNNING)
> + do_group_exit(SIGKILL);
> +
Wait a sec... do_group_exit() is very much not locking-neutral.
Aren't you introducing a bunch of potential deadlocks by adding
that?
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
