linux-kernel - Re: [v2] prctl: Deprecate non PR_SET_MM

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Message-ID: <20180420070257.GJ19578@uranus.lan>
Date:   Fri, 20 Apr 2018 10:02:57 +0300
From:   Cyrill Gorcunov <gorcunov@...il.com>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Michal Hocko <mhocko@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Andrey Vagin <avagin@...nvz.org>,
        Andrew Morton <akpm@...uxfoundation.org>,
        Pavel Emelyanov <xemul@...tuozzo.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Yang Shi <yang.shi@...ux.alibaba.com>
Subject: Re: [v2] prctl: Deprecate non PR_SET_MM_MAP operations

On Fri, Apr 20, 2018 at 11:38:09AM +0900, Sergey Senozhatsky wrote:
> On (04/05/18 21:26), Cyrill Gorcunov wrote:
> [..]
> > -
> >  #ifdef CONFIG_CHECKPOINT_RESTORE
> >  	if (opt == PR_SET_MM_MAP || opt == PR_SET_MM_MAP_SIZE)
> >  		return prctl_set_mm_map(opt, (const void __user *)addr, arg4);
> >  #endif
> >  
> > -	if (!capable(CAP_SYS_RESOURCE))
> > -		return -EPERM;
> > -
> > -	if (opt == PR_SET_MM_EXE_FILE)
> > -		return prctl_set_mm_exe_file(mm, (unsigned int)addr);
> > -
> > -	if (opt == PR_SET_MM_AUXV)
> > -		return prctl_set_auxv(mm, addr, arg4);
> 
> Then validate_prctl_map() and prctl_set_mm_exe_file() can be moved
> under CONFIG_CHECKPOINT_RESTORE ifdef.

I don't mind. Could you please make the patch on top of linux-next?