linux-kernel - Re: [PATCH] printk: fix buffer overflow potential for print

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Message-ID: <87ft1iwwxq.fsf@jogness.linutronix.de>
Date:   Fri, 26 Feb 2021 18:39:13 +0100
From:   John Ogness <john.ogness@...utronix.de>
To:     Alexander Gordeev <agordeev@...ux.ibm.com>
Cc:     Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, Sven Schnelle <svens@...ux.ibm.com>
Subject: Re: [PATCH] printk: fix buffer overflow potential for print_text()

On 2021-02-26, Alexander Gordeev <agordeev@...ux.ibm.com> wrote:
> I am seeing KASAN reporting incorrect 1-byte access in exactly
> same location Sven has identified before. In case there no
> fix for it yet, please see below what happens in case of pretty
> large buffer - WARN_ONCE() invocation in my case.

It looks like you have not applied the fix yet:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=08d60e5999540110576e7c1346d486220751b7f9

John Ogness