linux-kernel - Re: [PATCH 2/5] srcu: Fix error handling in init_srcu_struct

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] [day] [month] [year] [list]

Message-Id: <6443E8C5-0271-48C3-B3D1-3CD20DB782FD@joelfernandes.org>
Date:   Thu, 27 Jul 2023 00:24:01 -0400
From:   Joel Fernandes <joel@...lfernandes.org>
To:     paulmck@...nel.org
Cc:     linux-kernel@...r.kernel.org,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        "open list:SLEEPABLE READ-COPY UPDATE (SRCU)" <rcu@...r.kernel.org>
Subject: Re: [PATCH 2/5] srcu: Fix error handling in init_srcu_struct_fields()



> On Jul 27, 2023, at 12:02 AM, Paul E. McKenney <paulmck@...nel.org> wrote:
> 
> On Wed, Jul 26, 2023 at 11:04:04PM -0400, Joel Fernandes wrote:
>> 
>> 
>> On 7/26/23 17:07, Paul E. McKenney wrote:
>>>> -                free_percpu(ssp->sda);
>>>> -                ssp->sda = NULL;
>>>> -                kfree(ssp->srcu_sup);
>>>> -                return -ENOMEM;
>>>> -            }
>>>> -        } else {
>>>> +        if (!init_srcu_struct_nodes(ssp, GFP_ATOMIC))
>>>> +            goto err_free_sda;
>>>> +        else
>>>>            WRITE_ONCE(ssp->srcu_sup->srcu_size_state, SRCU_SIZE_BIG);
>>> Given that the "then" clause is a goto, what is the "else" clause doing
>>> for us?
>>> 
>> 
>> Not much. Agreed we can get rid of "else" and reduce indent of the
>> WRITE_ONCE that follows.
>> 
>> Would you mind making this fixup in the patch for your apply, or would
>> you like me to refresh the patch? Let me know either way, thank you!
> 
> Please include it with your next series, which has at least one other
> change anyway.  ;-)

My pleasure ;-).

- Joel


> 
>                            Thanx, Paul