diff --git a/fs/aio.c b/fs/aio.c
index f4a27af..6b868f0 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -479,6 +479,7 @@
 	struct aio_ring *ring;
 
 	spin_lock(&mm->ioctx_lock);
+	rcu_read_lock();
 	table = rcu_dereference(mm->ioctx_table);
 
 	while (1) {
@@ -487,6 +488,7 @@
 				if (!table->table[i]) {
 					ctx->id = i;
 					table->table[i] = ctx;
+					rcu_read_unlock();
 					spin_unlock(&mm->ioctx_lock);
 
 					ring = kmap_atomic(ctx->ring_pages[0]);
@@ -497,6 +499,7 @@
 
 		new_nr = (table ? table->nr : 1) * 4;
 
+		rcu_read_unlock();
 		spin_unlock(&mm->ioctx_lock);
 
 		table = kzalloc(sizeof(*table) + sizeof(struct kioctx *) *
@@ -507,6 +510,7 @@
 		table->nr = new_nr;
 
 		spin_lock(&mm->ioctx_lock);
+		rcu_read_lock();
 		old = rcu_dereference(mm->ioctx_table);
 
 		if (!old) {
@@ -631,10 +635,12 @@
 		struct kioctx_table *table;
 
 		spin_lock(&mm->ioctx_lock);
+		rcu_read_lock();
 		table = rcu_dereference(mm->ioctx_table);
 
 		WARN_ON(ctx != table->table[ctx->id]);
 		table->table[ctx->id] = NULL;
+		rcu_read_unlock();
 		spin_unlock(&mm->ioctx_lock);
 
 		/* percpu_ref_kill() will do the necessary call_rcu() */