linux-kernel - Re: [PATCH 20/22] sound: pci: avoid string overflow warnings

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Message-ID: <CAK8P3a3G+scFLTbJhxNpGEwAw5TG18M27x6zYOGVZY0GUsnpPw@mail.gmail.com>
Date:   Tue, 18 Jul 2017 13:52:30 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     Jaroslav Kysela <perex@...ex.cz>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        alsa-devel@...a-project.org,
        "David S . Miller" <davem@...emloft.net>,
        Geliang Tang <geliangtang@...il.com>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Takashi Sakamoto <o-takashi@...amocchi.jp>,
        linux-scsi <linux-scsi@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>
Subject: Re: [PATCH 20/22] sound: pci: avoid string overflow warnings

On Fri, Jul 14, 2017 at 2:28 PM, Takashi Iwai <tiwai@...e.de> wrote:
> On Fri, 14 Jul 2017 14:07:12 +0200,
>
> Thanks for the patch.  I have seen it but ignored, so far, as not sure
> which action is the best.  An alternative solution is to use
> snprintf() blindly, for example.
>
> For mixart, it's even better to drop mgr->shortname[] and longname[]
> assignment.  The shortname is the fixed string, and the longname is
> used only at copying to card->longname, so we can create a string
> there from the scratch.

I've done that now, and tried to be a little smarter with the other
conversions. I also found related problems in ISA drivers after
randconfig testing and fixed those as well.

Sent a 7-patch series now as a replacement.

       Arnd