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authorZach Brown <zach.brown@oracle.com>2010-07-23 10:30:45 -0700
committerAndy Grover <andy.grover@oracle.com>2010-09-08 18:16:45 -0700
commitfe8ff6b58f040dd52d2db45972db8e0301847f1c (patch)
treee332f689cfd9838b585f6106ff493672ce1db598 /net/rds
parentea819867b788728aca60717e4fdacb3df771f670 (diff)
downloadlwn-fe8ff6b58f040dd52d2db45972db8e0301847f1c.tar.gz
lwn-fe8ff6b58f040dd52d2db45972db8e0301847f1c.zip
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: Zach Brown <zach.brown@oracle.com>
Diffstat (limited to 'net/rds')
-rw-r--r--net/rds/connection.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/rds/connection.c b/net/rds/connection.c
index 0de40d9563ca..75a1a37d64d3 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -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);