linux-kernel - RE: [PATCH v2] exec: avoid gcc-8 warning for get_task

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Message-ID: <cc2e084d0a2f413b93e8929cbb413a40@AcuMS.aculab.com>
Date:   Wed, 6 Dec 2017 10:11:27 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Arnd Bergmann' <arnd@...db.de>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>
CC:     Kees Cook <keescook@...omium.org>, Serge Hallyn <serge@...lyn.com>,
        "James Morris" <james.l.morris@...cle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Aleksa Sarai <asarai@...e.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2] exec: avoid gcc-8 warning for get_task_comm

From: Arnd Bergmann
> Sent: 05 December 2017 15:17
> gcc-8 warns about using strncpy() with the source size as the limit:

Hmmm... Someone 'fixed' some of those in the NetBSD tree a few years back.
There was one place where the code was correct.
A potentially unterminated string was being copied into a buffer that was
one byte longer.

	David