diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 3d0485c361c73494ba87d81c1671ca03bd7820f0..56013371f9f3cdcd8c89a4455233522a415291aa 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -546,6 +546,11 @@ static int open_kcore(struct inode *inode, struct file *filp)
 		return -EPERM;
 	if (kcore_need_update)
 		kcore_update_ram();
+	if (i_size_read(inode) != proc_root_kcore->size) {
+		mutex_lock(&inode->i_mutex);
+		i_size_write(inode, proc_root_kcore->size);
+		mutex_unlock(&inode->i_mutex);
+	}
 	return 0;
 }