linux-kernel - Re: IPv4: sysctl table check failed [was: mmotm 2010-10-07-14-08 uploaded]

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Message-ID: <1286490135.6536.75.camel@edumazet-laptop>
Date:	Fri, 08 Oct 2010 00:22:15 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	mm-commits@...r.kernel.org, ML netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: IPv4: sysctl table check failed [was: mmotm 2010-10-07-14-08
 uploaded]

Le vendredi 08 octobre 2010 à 00:06 +0200, Jiri Slaby a écrit :
> On 10/07/2010 11:08 PM, akpm@...ux-foundation.org wrote:
> > The mm-of-the-moment snapshot 2010-10-07-14-08 has been uploaded to
> 
> Hi, I got bunch of "sysctl table check failed" below. All seem to be
> related to ipv4:

I would say, sysctl check is buggy :(

min/max are optional

[PATCH] sysctl: min/max bounds are optional

sysctl check complains when proc_doulongvec_minmax or
proc_doulongvec_ms_jiffies_minmax are used by a vector of longs (with
more than one element), with no min or max value specified.

This is unexpected, given we had a bug on this min/max handling :)

Reported-by: Jiri Slaby <jirislaby@...il.com>
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
 kernel/sysctl_check.c |    9 ---------
 1 file changed, 9 deletions(-)

diff --git a/kernel/sysctl_check.c b/kernel/sysctl_check.c
index 04cdcf7..10b90d8 100644
--- a/kernel/sysctl_check.c
+++ b/kernel/sysctl_check.c
@@ -143,15 +143,6 @@ int sysctl_check_table(struct nsproxy *namespaces, struct ctl_table *table)
 				if (!table->maxlen)
 					set_fail(&fail, table, "No maxlen");
 			}
-			if ((table->proc_handler == proc_doulongvec_minmax) ||
-			    (table->proc_handler == proc_doulongvec_ms_jiffies_minmax)) {
-				if (table->maxlen > sizeof (unsigned long)) {
-					if (!table->extra1)
-						set_fail(&fail, table, "No min");
-					if (!table->extra2)
-						set_fail(&fail, table, "No max");
-				}
-			}
 #ifdef CONFIG_PROC_SYSCTL
 			if (table->procname && !table->proc_handler)
 				set_fail(&fail, table, "No proc_handler");


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