linux-kernel - Re: [PATCH 1/4] mremap: don't leak new_vma if f

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Message-ID: <alpine.DEB.2.10.1506301530300.24266@chino.kir.corp.google.com>
Date:	Tue, 30 Jun 2015 15:31:19 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Oleg Nesterov <oleg@...hat.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Benjamin LaHaise <bcrl@...ck.org>,
	Hugh Dickins <hughd@...gle.com>,
	Jeff Moyer <jmoyer@...hat.com>,
	Kirill Shutemov <kirill.shutemov@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] mremap: don't leak new_vma if f_op->mremap() fails

On Sat, 20 Jun 2015, Oleg Nesterov wrote:

> move_vma() can't just return if f_op->mremap() fails, we should
> unmap the new vma like we do if move_page_tables() fails. To avoid
> the code duplication this patch moves the "move entries back" under
> the new "if (err)" branch.
> 
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

Looks good!  I think it was sniped by commit 4abad2ca4a4d ("mm: new 
arch_remap() hook") so it needs to be rebased, but after that feel free to 
add my

	Acked-by: David Rientjes <rientjes@...gle.com>
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