From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leon Romanovsky Subject: [PATCH rdma-rc 5/5] IB/ipoib: Fix memory leak in create child syscall Date: Wed, 14 Jun 2017 09:59:09 +0300 Message-ID: <20170614065909.23650-6-leon@kernel.org> References: <20170614065909.23650-1-leon@kernel.org> Return-path: In-Reply-To: <20170614065909.23650-1-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Doug Ledford Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Feras Daoud List-Id: linux-rdma@vger.kernel.org From: Feras Daoud The flow of creating a new child goes through ipoib_vlan_add which allocates a new interface and checks the rtnl_lock. If the lock is taken, restart_syscall will be called to restart the system call again. In this case we are not releasing the already allocated interface, causing a leak. Fixes: 9baa0b036410 ("IB/ipoib: Add rtnl_link_ops support") Signed-off-by: Feras Daoud Signed-off-by: Leon Romanovsky --- drivers/infiniband/ulp/ipoib/ipoib_vlan.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c index 1ee46194bbf5..081b33deff1b 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c @@ -133,13 +133,13 @@ int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey) snprintf(intf_name, sizeof intf_name, "%s.%04x", ppriv->dev->name, pkey); + if (!rtnl_trylock()) + return restart_syscall(); + priv = ipoib_intf_alloc(ppriv->ca, ppriv->port, intf_name); if (!priv) return -ENOMEM; - if (!rtnl_trylock()) - return restart_syscall(); - down_write(&ppriv->vlan_rwsem); /* -- 2.12.2 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html