mm: fix prctl_set_vma_anon_name

prctl_set_vma_anon_name could attempt to set the name across
two vmas at the same time due to a typo, which might corrupt
the vma list.  Fix it to use tmp instead of end to limit
the name setting to a single vma at a time.

Change-Id: Ie32d8ddb0fd547efbeedd6528acdab5ca5b308b4
Reported-by: Jed Davis <>
Signed-off-by: Colin Cross <>
diff --git a/kernel/sys.c b/kernel/sys.c
index f7e7a8b..800c5f2 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1934,7 +1934,7 @@
 			tmp = end;
 		/* Here vma->vm_start <= start < tmp <= (end|vma->vm_end). */
-		error = prctl_update_vma_anon_name(vma, &prev, start, end,
+		error = prctl_update_vma_anon_name(vma, &prev, start, tmp,
 				(const char __user *)arg);
 		if (error)
 			return error;