From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Sasha Levin <sasha.levin@oracle.com>
Cc: akpm@linux-foundation.org, kirill.shutemov@linux.intel.com,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: remap_file_pages: initialize populate before usage
Date: Mon, 12 May 2014 20:05:04 +0300 [thread overview]
Message-ID: <20140512170504.GA30120@node.dhcp.inet.fi> (raw)
In-Reply-To: <1399898454-14915-1-git-send-email-sasha.levin@oracle.com>
On Mon, May 12, 2014 at 08:40:54AM -0400, Sasha Levin wrote:
> 'populate' wasn't initialized before being used in error paths,
> causing panics when mm_populate() would get called with invalid
> values.
>
> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> ---
> mm/mmap.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/mmap.c b/mm/mmap.c
> index 84dcfc7..2a0e0a8 100644
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -2591,7 +2591,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
>
> struct mm_struct *mm = current->mm;
> struct vm_area_struct *vma;
> - unsigned long populate;
> + unsigned long populate = 0;
> unsigned long ret = -EINVAL;
>
> pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. "
> --
> 1.7.10.4
>
> --
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--
Kirill A. Shutemov
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prev parent reply other threads:[~2014-05-12 17:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-12 12:40 [PATCH] mm: remap_file_pages: initialize populate before usage Sasha Levin
2014-05-12 17:05 ` Kirill A. Shutemov [this message]
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