linux-kernel - Re: [PATCH 60/60] staging: lustre: libcfs: fix minimum size check for libcfs ioctl

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Date:   Tue, 31 Jan 2017 00:48:29 +0000 (GMT)
From:   James Simmons <jsimmons@...radead.org>
To:     Dan Carpenter <dan.carpenter@...cle.com>
cc:     Liang Zhen <liang.zhen@...el.com>,
        Amir Shehata <amir.shehata@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org,
        Andreas Dilger <andreas.dilger@...el.com>,
        Oleg Drokin <oleg.drokin@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Lustre Development List <lustre-devel@...ts.lustre.org>
Subject: Re: [PATCH 60/60] staging: lustre: libcfs: fix minimum size check
 for libcfs ioctl


> On Mon, Jan 30, 2017 at 01:51:56PM +0300, Dan Carpenter wrote:
> > The lstcon_ioctl_entry() function doesn't have enough size checking.
> 
> Actually, the lstcon_ioctl_entry() would have been fine before we apply
> this [patch 60/60]...  As near as I can tell, no in kernel code is
> negatively affected by the bug this patch fixes.

There is one, the ioctl IOC_LIBCFS_GET_LNET_STATS was affected by this
bug. That is how it was founded.