linux-kernel - Re: [PATCH] printk: Do not miss new messages when replaying the log

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: <20181003092301.n5qazxuvjadlbkel@pathway.suse.cz>
Date:   Wed, 3 Oct 2018 11:23:01 +0200
From:   Petr Mladek <pmladek@...e.com>
To:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] printk: Do not miss new messages when replaying the log

On Thu 2018-09-13 14:34:06, Petr Mladek wrote:
> The variable "exclusive_console" is used to reply all existing messages
> on a newly registered console. It is cleared when all messages are out.
> 
> The problem is that new messages might appear in the meantime. These
> are then visible only on the exclusive console.
> 
> The obvious solution is to clear "exclusive_console" after we replay
> all messages that were already proceed before we started the reply.
> 
> Reported-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
> Signed-off-by: Petr Mladek <pmladek@...e.com>
> Acked-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>

JFYI, I have pushed this into printk.git, for-4.20 branch.

Best Regards,
Petr