linux-kernel - Re: [PATCH 2/3] rcu: Fix rcu_dynticks_curr_cpu_in

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: <87bl4c9vlh.ffs@tglx>
Date:   Wed, 29 Sep 2021 00:35:54 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>, paulmck@...nel.org,
        sfr@...b.auug.org.au
Cc:     linux-kernel@...r.kernel.org, peterz@...radead.org
Subject: Re: [PATCH 2/3] rcu: Fix rcu_dynticks_curr_cpu_in_eqs() vs noinstr

On Tue, Sep 28 2021 at 10:40, Peter Zijlstra wrote:

>   vmlinux.o: warning: objtool: rcu_nmi_enter()+0x36: call to __kasan_check_read() leaves .noinstr.text section
>
> noinstr cannot have atomic_*() functions in because they're explicitly
> annotated, use arch_atomic_*().
>
> Fixes: 2be57f732889 ("rcu: Weaken ->dynticks accesses and updates")
> Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>

Reviewed-by: Thomas Gleixner <tglx@...utronix.de>