From 2f76b861bd35c0621a57771c93b8e167a75ead83 Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hugh@veritas.com>
Date: Mon, 17 Apr 2006 22:46:32 +0100
Subject: [PATCH] --- yaml --- r: 25865 b: refs/heads/master c:
 69cf0fac6052c5bd3fb3469a41d4216e926028f8 h: refs/heads/master i:   25863:
 ebb285787af7d7577bb1ad596886456b056fe189 v: v3

---
 [refs]             | 2 +-
 trunk/mm/madvise.c | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index adc360b59643..bcaa9946d022 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e14d95f773b7365b6ba2d2105522c92b007c6db1
+refs/heads/master: 69cf0fac6052c5bd3fb3469a41d4216e926028f8
diff --git a/trunk/mm/madvise.c b/trunk/mm/madvise.c
index af3d573b0141..4e196155a0c3 100644
--- a/trunk/mm/madvise.c
+++ b/trunk/mm/madvise.c
@@ -168,6 +168,9 @@ static long madvise_remove(struct vm_area_struct *vma,
 			return -EINVAL;
 	}
 
+	if ((vma->vm_flags & (VM_SHARED|VM_WRITE)) != (VM_SHARED|VM_WRITE))
+		return -EACCES;
+
 	mapping = vma->vm_file->f_mapping;
 
 	offset = (loff_t)(start - vma->vm_start)