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authorSowmini Varadhan <sowmini.varadhan@oracle.com>2017-03-04 08:57:33 -0800
committerDavid S. Miller <davem@davemloft.net>2017-03-07 14:09:59 -0800
commit8edc3affc0770886c7bfb3436b0fdd09bce13167 (patch)
treecfe3a2ae7348961f4c8872ffd5158d2ba4e35235 /net/rds/connection.c
parentfa4c7fb2ad2ea5dae57eb875915d0efb1e068543 (diff)
downloadop-kernel-dev-8edc3affc0770886c7bfb3436b0fdd09bce13167.zip
op-kernel-dev-8edc3affc0770886c7bfb3436b0fdd09bce13167.tar.gz
rds: tcp: Take explicit refcounts on struct net
It is incorrect for the rds_connection to piggyback on the sock_net() refcount for the netns because this gives rise to a chicken-and-egg problem during rds_conn_destroy. Instead explicitly take a ref on the net, and hold the netns down till the connection tear-down is complete. Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/connection.c')
-rw-r--r--net/rds/connection.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/rds/connection.c b/net/rds/connection.c
index 0e04dcc..1fa75ab 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -429,6 +429,7 @@ void rds_conn_destroy(struct rds_connection *conn)
*/
rds_cong_remove_conn(conn);
+ put_net(conn->c_net);
kmem_cache_free(rds_conn_slab, conn);
spin_lock_irqsave(&rds_conn_lock, flags);
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