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IB/ipoib: Fix memory leak in create child syscall

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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: 9baa0b0364 ("IB/ipoib: Add rtnl_link_ops support")
Signed-off-by: Feras Daoud <ferasda@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Feras Daoud 2017-06-14 09:59:09 +03:00 committed by Doug Ledford
parent 560b7c3ffe
commit 4542d66bb2
1 changed files with 3 additions and 3 deletions
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6
drivers/infiniband/ulp/ipoib/ipoib_vlan.c
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@ -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);
/*