From: Andrew Morton <akpm@linux-foundation.org>
To: David Rientjes <rientjes@google.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>,
Kees Cook <keescook@chromium.org>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Rik van Riel <riel@redhat.com>,
linux-mm@kvack.org
Subject: Re: [patch -mm] mm, mempolicy: silence gcc warning
Date: Wed, 20 Nov 2013 14:15:34 -0800 [thread overview]
Message-ID: <20131120141534.06ea091ca53b1dec60ace63d@linux-foundation.org> (raw)
In-Reply-To: <alpine.DEB.2.02.1311121811310.29891@chino.kir.corp.google.com>
On Tue, 12 Nov 2013 18:12:32 -0800 (PST) David Rientjes <rientjes@google.com> wrote:
> Fengguang Wu reports that compiling mm/mempolicy.c results in a warning:
>
> mm/mempolicy.c: In function 'mpol_to_str':
> mm/mempolicy.c:2878:2: error: format not a string literal and no format arguments
>
> Kees says this is because he is using -Wformat-security.
>
> Silence the warning.
>
> ...
>
> --- a/mm/mempolicy.c
> +++ b/mm/mempolicy.c
> @@ -2950,7 +2950,7 @@ void mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol)
> return;
> }
>
> - p += snprintf(p, maxlen, policy_modes[mode]);
> + p += snprintf(p, maxlen, "%s", policy_modes[mode]);
>
> if (flags & MPOL_MODE_FLAGS) {
> p += snprintf(p, buffer + maxlen - p, "=");
mutter. There are no '%'s in policy_modes[]. Maybe we should only do
this #ifdef CONFIG_KEES.
mpol_to_str() would be simpler (and slower) if it was switched to use
strncat().
It worries me that the CONFIG_NUMA=n version of mpol_to_str() doesn't
stick a '\0' into *buffer. Hopefully it never gets called...
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2013-11-20 22:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-13 2:12 David Rientjes
2013-11-13 19:20 ` Kees Cook
2013-11-20 22:15 ` Andrew Morton [this message]
2013-11-20 22:19 ` Kees Cook
2013-11-23 20:49 ` KOSAKI Motohiro
2013-11-25 20:31 ` Andrew Morton
2013-11-25 23:30 ` David Rientjes
2013-11-25 23:33 ` [patch] mm, mempolicy: remove unneeded functions for UMA configs David Rientjes
2013-11-26 0:08 ` [patch -mm] mm, mempolicy: silence gcc warning KOSAKI Motohiro
2013-11-26 0:20 ` Andrew Morton
2013-11-26 18:40 ` KOSAKI Motohiro
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20131120141534.06ea091ca53b1dec60ace63d@linux-foundation.org \
--to=akpm@linux-foundation.org \
--cc=fengguang.wu@intel.com \
--cc=keescook@chromium.org \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=linux-mm@kvack.org \
--cc=riel@redhat.com \
--cc=rientjes@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox