[PATCH] core remove PageReserved

[net-next-2.6.git] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index 459b9f068ad7b13f8241f024fe779e2b26cfcff7..8a111792b8db6b22f19d8b1de8b006a48927221b 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1088,6 +1088,17 @@ munmap_back:
                error = file->f_op->mmap(file, vma);
                if (error)
                        goto unmap_and_free_vma;
+               if ((vma->vm_flags & (VM_SHARED | VM_WRITE | VM_RESERVED))
+                                               == (VM_WRITE | VM_RESERVED)) {
+                       printk(KERN_WARNING "program %s is using MAP_PRIVATE, "
+                               "PROT_WRITE mmap of VM_RESERVED memory, which "
+                               "is deprecated. Please report this to "
+                               "linux-kernel@vger.kernel.org\n",current->comm);
+                       if (vma->vm_ops && vma->vm_ops->close)
+                               vma->vm_ops->close(vma);
+                       error = -EACCES;
+                       goto unmap_and_free_vma;
+               }
        } else if (vm_flags & VM_SHARED) {
                error = shmem_zero_setup(vma);
                if (error)