From: Dominique Martinet <asmadeus@codewreck.org>
To: Daniel Thompson <daniel.thompson@linaro.org>,
David Laight <David.Laight@ACULAB.COM>
Cc: Jason Wessel <jason.wessel@windriver.com>,
Arnd Bergmann <arnd@arndb.de>,
kgdb-bugreport@lists.sourceforge.net,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 14/18] kdb_support: change strncpy+truncation to strlcpy
Date: Fri, 13 Jul 2018 17:18:51 +0200 [thread overview]
Message-ID: <20180713151851.GA14190@nautica> (raw)
In-Reply-To: <93d3ace9a35b4436930ed0521127c12b@AcuMS.aculab.com> <20180713103321.thjpohla6fuszona@holly.lan>
Daniel Thompson wrote on Fri, Jul 13, 2018:
> On Fri, Jul 13, 2018 at 03:25:58AM +0200, Dominique Martinet wrote:
> > Generated by scripts/coccinelle/misc/strncpy_truncation.cocci
> >
> > Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
>
> It would have been good for you to mention in the changelog how
> you reviewed your change to verify that the extra zero padding
> from strncpy() isn't required.
I'm sorry, I went a bit too fast with the send-email button on this
path series; I agree it is lacking.
> However... I have taken a look and can't see any problem so:
>
> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Thank you for the review, I will update the commit message with more
details and change strlcpy to strscpy in a v2
David Laight wrote on Fri, Jul 13, 2018:
> > - strncpy(knt1, symtab->sym_name, knt1_size);
> > - knt1[knt1_size-1] = '\0';
> > + strlcpy(knt1, symtab->sym_name, knt1_size);
>
> You'd be better using strscpy() not strlcpy().
> The return value of strlcpy() is the length of the source string.
> If the source string isn't '\0' terminated horrid things happen.
I was suggested to use strlcpy for drm and didn't realize this at this
point, but you are correct; strlcpy is far from being as protective.
I'll update the coccinelle patch to use strscpy and resend this.
> David
>
> Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes,
> MK1 1PT, UK
> Registration No: 1397386 (Wales)
>
> P Please consider the environment and don't print this e-mail unless
> you really need to
(By the way, your e-mail client sends both html and text, but the text
version only included the footer so my mail client, which prefers text,
was displaying an empty mail message. If possible I would appreciate if
you could disable either version so as to get a coherent message)
--
Dominique Martinet
next prev parent reply other threads:[~2018-07-13 15:19 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-13 1:14 [PATCH 01/18] coccinelle: change strncpy+truncation to strlcpy Dominique Martinet
2018-07-13 1:25 ` [PATCH 02/18] block/aoenet: " Dominique Martinet
2018-07-13 14:16 ` Jens Axboe
2018-07-13 15:31 ` Dominique Martinet
2018-07-13 1:25 ` [PATCH 03/18] drm_property: " Dominique Martinet
2018-07-13 1:25 ` [PATCH 04/18] nouveau: " Dominique Martinet
2018-07-13 1:25 ` [PATCH 05/18] iio: " Dominique Martinet
2018-07-15 10:39 ` Jonathan Cameron
2018-07-16 11:42 ` Dominique Martinet
2018-07-22 8:13 ` Jonathan Cameron
2018-07-13 1:25 ` [PATCH 06/18] mptctl: " Dominique Martinet
2018-07-13 1:25 ` [PATCH 07/18] hisilicon: " Dominique Martinet
2018-07-13 1:25 ` [PATCH 08/18] myricom: " Dominique Martinet
2018-07-13 1:25 ` [PATCH 09/18] qlogic/qed: " Dominique Martinet
2018-07-13 1:25 ` [PATCH 10/18] brcmsmac: " Dominique Martinet
2018-07-13 7:19 ` Arend van Spriel
2018-07-13 1:25 ` [PATCH 11/18] wireless/ti: " Dominique Martinet
2018-07-13 7:38 ` Greg Kroah-Hartman
2018-07-13 7:47 ` Arend van Spriel
2018-07-13 8:13 ` Dominique Martinet
2018-07-13 18:56 ` Rustad, Mark D
2018-07-27 9:19 ` Kalle Valo
2018-07-13 1:25 ` [PATCH 12/18] test_power: " Dominique Martinet
2018-07-13 1:25 ` [PATCH 13/18] ibmvscsi: " Dominique Martinet
2018-07-13 1:25 ` [PATCH 14/18] kdb_support: " Dominique Martinet
2018-07-13 10:33 ` Daniel Thompson
2018-07-13 15:18 ` Dominique Martinet [this message]
2018-07-16 8:23 ` Daniel Thompson
2018-07-13 1:26 ` [PATCH 15/18] blktrace: " Dominique Martinet
2019-03-15 1:37 ` Steven Rostedt
2019-03-15 2:01 ` Jens Axboe
2019-03-15 6:30 ` Dominique Martinet
2019-03-15 14:29 ` Jens Axboe
2018-07-13 1:26 ` [PATCH 16/18] tools/accounting: " Dominique Martinet
2018-07-13 1:26 ` [PATCH 17/18] perf: " Dominique Martinet
2018-07-13 1:26 ` [PATCH 18/18] cpupower: " Dominique Martinet
2018-07-24 16:31 ` Shuah Khan
2018-08-14 15:45 ` Daniel Díaz
2018-08-14 19:27 ` Dominique Martinet
2018-08-20 14:27 ` Shuah Khan
2018-07-13 7:44 ` [Cocci] [PATCH 01/18] coccinelle: " Himanshu Jha
2018-07-13 8:00 ` Dominique Martinet
2018-07-13 9:14 ` Himanshu Jha
2018-07-13 9:44 ` Julia Lawall
2018-07-13 10:21 ` Himanshu Jha
2018-07-13 10:50 ` Julia Lawall
2018-07-13 16:11 ` Dominique Martinet
2018-07-14 8:12 ` [PATCH v2] coccinelle: strncpy+truncation by strscpy Dominique Martinet
2018-07-14 11:54 ` Julia Lawall
[not found] ` <alpine.DEB.2.20.1807140743550.3356@hadrien>
2018-07-14 13:08 ` Dominique Martinet
2018-07-14 20:36 ` Julia Lawall
2018-07-14 14:34 ` [v2] Coccinelle: Replace strncpy() + truncation by strscpy() SF Markus Elfring
2018-07-20 0:36 ` [PATCH v3] coccinelle: suggest replacing strncpy+truncation by strscpy Dominique Martinet
2018-07-20 5:33 ` Julia Lawall
2018-07-20 5:40 ` Dominique Martinet
2018-07-20 5:49 ` Julia Lawall
2018-07-20 5:57 ` Dominique Martinet
2018-07-20 6:03 ` Julia Lawall
2018-07-20 11:00 ` [v3] Coccinelle: " SF Markus Elfring
2018-07-20 9:40 ` SF Markus Elfring
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