X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=blobdiff_plain;f=mm%2Fmmap.c;h=e8dcfc7de866e2b7c1a1dccd90eb4a9aff89161d;hp=69a1889f3790112b1a9b3aac10462fbd3ffd2733;hb=aa2e878efa7949c8502c9760f92835222714f090;hpb=927ad551031798d4cba49766549600bbb33872d7

diff --git a/mm/mmap.c b/mm/mmap.c
index 69a1889f3790..e8dcfc7de866 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -30,6 +30,7 @@
 #include <linux/perf_event.h>
 #include <linux/audit.h>
 #include <linux/khugepaged.h>
+#include <linux/uprobes.h>
 
 #include <asm/uaccess.h>
 #include <asm/cacheflush.h>
@@ -546,8 +547,15 @@ again:			remove_next = 1 + (end > next->vm_end);
 
 	if (file) {
 		mapping = file->f_mapping;
-		if (!(vma->vm_flags & VM_NONLINEAR))
+		if (!(vma->vm_flags & VM_NONLINEAR)) {
 			root = &mapping->i_mmap;
+			uprobe_munmap(vma, vma->vm_start, vma->vm_end);
+
+			if (adjust_next)
+				uprobe_munmap(next, next->vm_start,
+							next->vm_end);
+		}
+
 		mutex_lock(&mapping->i_mmap_mutex);
 		if (insert) {
 			/*
@@ -617,8 +625,16 @@ again:			remove_next = 1 + (end > next->vm_end);
 	if (mapping)
 		mutex_unlock(&mapping->i_mmap_mutex);
 
+	if (root) {
+		uprobe_mmap(vma);
+
+		if (adjust_next)
+			uprobe_mmap(next);
+	}
+
 	if (remove_next) {
 		if (file) {
+			uprobe_munmap(next, next->vm_start, next->vm_end);
 			fput(file);
 			if (next->vm_flags & VM_EXECUTABLE)
 				removed_exe_file_vma(mm);
@@ -638,6 +654,8 @@ again:			remove_next = 1 + (end > next->vm_end);
 			goto again;
 		}
 	}
+	if (insert && file)
+		uprobe_mmap(insert);
 
 	validate_mm(mm);
 
@@ -1371,6 +1389,11 @@ out:
 			mm->locked_vm += (len >> PAGE_SHIFT);
 	} else if ((flags & MAP_POPULATE) && !(flags & MAP_NONBLOCK))
 		make_pages_present(addr, addr + len);
+
+	if (file && uprobe_mmap(vma))
+		/* matching probes but cannot insert */
+		goto unmap_and_free_vma;
+
 	return addr;
 
 unmap_and_free_vma:
@@ -2358,6 +2381,10 @@ int insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma)
 	if ((vma->vm_flags & VM_ACCOUNT) &&
 	     security_vm_enough_memory_mm(mm, vma_pages(vma)))
 		return -ENOMEM;
+
+	if (vma->vm_file && uprobe_mmap(vma))
+		return -EINVAL;
+
 	vma_link(mm, vma, prev, rb_link, rb_parent);
 	return 0;
 }
@@ -2427,6 +2454,10 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
 			new_vma->vm_pgoff = pgoff;
 			if (new_vma->vm_file) {
 				get_file(new_vma->vm_file);
+
+				if (uprobe_mmap(new_vma))
+					goto out_free_mempol;
+
 				if (vma->vm_flags & VM_EXECUTABLE)
 					added_exe_file_vma(mm);
 			}