From: Sasha Levin <sasha.levin@oracle.com>
Date: Sat, 17 May 2014 13:19:30 +0000 (+1000)
Subject: mm: remap_file_pages: initialize populate before usage
X-Git-Tag: next-20140520~1^2~15
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=51ca6b1ab92c6c5122f60e6dbc221ac0d65b0f03;p=karo-tx-linux.git

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@oracle.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/mmap.c b/mm/mmap.c
index 84dcfc72afd5..2a0e0a8337b6 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. "