kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/arch/nios2/kernel/sys_nios2.c
..
..
@@ -22,6 +22,7 @@
22
22
 				unsigned int op)
23
23
 {
24
24
 	struct vm_area_struct *vma;
25
+	struct mm_struct *mm = current->mm;
25
26
 
26
27
 	if (len == 0)
27
28
 		return 0;
..
..
@@ -34,16 +35,22 @@
34
35
 	if (addr + len < addr)
35
36
 		return -EFAULT;
36
37
 
38
+	if (mmap_read_lock_killable(mm))
39
+		return -EINTR;
40
+
37
41
 	/*
38
42
 	 * Verify that the specified address region actually belongs
39
43
 	 * to this process.
40
44
 	 */
41
-	vma = find_vma(current->mm, addr);
42
-	if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end)
45
+	vma = find_vma(mm, addr);
46
+	if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) {
47
+		mmap_read_unlock(mm);
43
48
 		return -EFAULT;
49
+	}
44
50
 
45
51
 	flush_cache_range(vma, addr, addr + len);
46
52
 
53
+	mmap_read_unlock(mm);
47
54
 	return 0;
48
55
 }
49
56