linux-kernel - Re: [BUG] timer_migration interface accepts any number as input in 2.6.30-git9

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1245669728.4368.1.camel@localhost.localdomain>
Date:	Mon, 22 Jun 2009 16:52:08 +0530
From:	poornima nayak <mpnayak@...ux.vnet.ibm.com>
To:	arun@...ux.vnet.ibm.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [BUG] timer_migration interface accepts any number as input in
 2.6.30-git9

Hi Arun, 

Patch given by you fixes the reported bug.

Regds
Poornima
On Wed, 2009-06-17 at 15:51 +0530, Arun R Bharadwaj wrote:
> * poornima nayak <mpnayak@...ux.vnet.ibm.com> [2009-06-17 14:42:16]:
> 
> > Hi
> > 
> > Timer migration interface /proc/sys/kernel/timer_migration in
> > 2.6.30-git9 accepts any numerical value as input.
> > Steps to reproduce 
> > 1. echo -6666666 > /proc/sys/kernel/timer_migration
> > 2. cat /proc/sys/kernel/timer_migration
> > -6666666
> > 
> > 1. echo 44444444444444444444444444444444444444444444444444444444444 > /proc/sys/kernel/timer_migration
> > 2. cat /proc/sys/kernel/timer_migration
> > -1357789412
> > 
> > Expected behavior: Should 'echo: write error: Invalid argument' while
> > setting any value other then 0 & 1
> > 
> > Regards
> > Poornima
> > 
> 
> Hi Poornima,
> 
> Thanks for reporting the bug.
> Hope this patch removes the bug.
> The patch is based against the latest -tip/master.
> 
> --arun
> 
> 
> Signed-off-by: Arun R Bharadwaj <arun@...ux.vnet.ibm.com>
> ---
>  kernel/sysctl.c |    5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> Index: linux.trees.git/kernel/sysctl.c
> ===================================================================
> --- linux.trees.git.orig/kernel/sysctl.c
> +++ linux.trees.git/kernel/sysctl.c
> @@ -335,7 +335,10 @@ static struct ctl_table kern_table[] = {
>  		.data		= &sysctl_timer_migration,
>  		.maxlen		= sizeof(unsigned int),
>  		.mode		= 0644,
> -		.proc_handler	= &proc_dointvec,
> +		.proc_handler	= &proc_dointvec_minmax,
> +		.strategy	= &sysctl_intvec,
> +		.extra1		= &zero,
> +		.extra2		= &one,
>  	},
>  #endif
>  	{
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/