X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fmremap.c;h=8ea5c2412c6e155aef62dbaa1fb4c882b77c1acc;hb=f563d53c30f3e60cde3a194cc1a87284ee0b3366;hp=1903bdf65e428d88e5bf124243d99ee7ab7c51e3;hpb=536ea4e4198eeaa5a73fb734ea675e621609bb7e;p=linux-2.6

diff --git a/mm/mremap.c b/mm/mremap.c
index 1903bdf65e..8ea5c2412c 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -97,18 +97,19 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
  	new_pte = pte_offset_map_nested(new_pmd, new_addr);
 	new_ptl = pte_lockptr(mm, new_pmd);
 	if (new_ptl != old_ptl)
-		spin_lock(new_ptl);
+		spin_lock_nested(new_ptl, SINGLE_DEPTH_NESTING);
+	arch_enter_lazy_mmu_mode();
 
 	for (; old_addr < old_end; old_pte++, old_addr += PAGE_SIZE,
 				   new_pte++, new_addr += PAGE_SIZE) {
 		if (pte_none(*old_pte))
 			continue;
 		pte = ptep_clear_flush(vma, old_addr, old_pte);
-		/* ZERO_PAGE can be dependant on virtual addr */
 		pte = move_pte(pte, new_vma->vm_page_prot, old_addr, new_addr);
 		set_pte_at(mm, new_addr, new_pte, pte);
 	}
 
+	arch_leave_lazy_mmu_mode();
 	if (new_ptl != old_ptl)
 		spin_unlock(new_ptl);
 	pte_unmap_nested(new_pte - 1);
@@ -119,7 +120,7 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
 
 #define LATENCY_LIMIT	(64 * PAGE_SIZE)
 
-static unsigned long move_page_tables(struct vm_area_struct *vma,
+unsigned long move_page_tables(struct vm_area_struct *vma,
 		unsigned long old_addr, struct vm_area_struct *new_vma,
 		unsigned long new_addr, unsigned long len)
 {
@@ -290,6 +291,10 @@ unsigned long do_mremap(unsigned long addr,
 		if ((addr <= new_addr) && (addr+old_len) > new_addr)
 			goto out;
 
+		ret = security_file_mmap(0, 0, 0, 0, new_addr, 1);
+		if (ret)
+			goto out;
+
 		ret = do_munmap(mm, new_addr, new_len);
 		if (ret)
 			goto out;
@@ -389,8 +394,13 @@ unsigned long do_mremap(unsigned long addr,
 
 			new_addr = get_unmapped_area(vma->vm_file, 0, new_len,
 						vma->vm_pgoff, map_flags);
-			ret = new_addr;
-			if (new_addr & ~PAGE_MASK)
+			if (new_addr & ~PAGE_MASK) {
+				ret = new_addr;
+				goto out;
+			}
+
+			ret = security_file_mmap(0, 0, 0, 0, new_addr, 1);
+			if (ret)
 				goto out;
 		}
 		ret = move_vma(vma, addr, old_len, new_len, new_addr);