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IB/ipoib: rtnl_unlock can not come after free_netdev

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[ Upstream commit 89a3987ab7 ]

The ipoib_vlan_add function calls rtnl_unlock after free_netdev,
rtnl_unlock not only releases the lock, but also calls netdev_run_todo.
The latter function browses the net_todo_list array and completes the
unregistration of all its net_device instances. If we call free_netdev
before rtnl_unlock, then netdev_run_todo call over the freed device causes
panic.
To fix, move rtnl_unlock call before free_netdev call.

Fixes: 9baa0b0364 ("IB/ipoib: Add rtnl_link_ops support")
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Feras Daoud <ferasda@mellanox.com>
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Feras Daoud
2016-12-28 14:47:24 +02:00
committed by Greg Kroah-Hartman
parent 9326a1374b
commit f1d53c6d48
1 changed files with 2 additions and 2 deletions
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4
drivers/infiniband/ulp/ipoib/ipoib_vlan.c
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@@ -160,11 +160,11 @@ int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
out:
up_write(&ppriv->vlan_rwsem);
rtnl_unlock();
if (result)
free_netdev(priv->dev);
rtnl_unlock();
return result;
}