linux-kernel - [PATCH] mm: remap_file_pages: initialize populate before usage

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Date:	Mon, 12 May 2014 08:40:54 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	akpm@...ux-foundation.org, kirill.shutemov@...ux.intel.com
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Sasha Levin <sasha.levin@...cle.com>
Subject: [PATCH] mm: remap_file_pages: initialize populate before usage

'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@...cle.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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