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Commit fe8ff6b5 authored by Zach Brown's avatar Zach Brown Committed by Andy Grover
Browse files

RDS: lock rds_conn_count decrement in rds_conn_destroy() 



rds_conn_destroy() can race with all other modifications of the
rds_conn_count but it was modifying the count without locking.

Signed-off-by: default avatarZach Brown <zach.brown@oracle.com>
parent ea819867

net/rds/connection.c

+3 −0
Original line number Diff line number Diff line
@@ -313,6 +313,7 @@ void rds_conn_shutdown(struct rds_connection *conn) 
void rds_conn_destroy(struct rds_connection *conn)

{

	struct rds_message *rm, *rtmp;

	unsigned long flags;



	rdsdebug("freeing conn %p for %pI4 -> "

		 "%pI4\n", conn, &conn->c_laddr,
@@ -350,7 +351,9 @@ void rds_conn_destroy(struct rds_connection *conn) 
	BUG_ON(!list_empty(&conn->c_retrans));

	kmem_cache_free(rds_conn_slab, conn);



	spin_lock_irqsave(&rds_conn_lock, flags);

	rds_conn_count--;

	spin_unlock_irqrestore(&rds_conn_lock, flags);

}

EXPORT_SYMBOL_GPL(rds_conn_destroy);