[PATCH net-next] cxgb4vf: fix memleak in mac_hlist initialization

[PATCH net-next] cxgb4vf: fix memleak in mac_hlist initialization

[Arjun Vynipadath]

mac_hlist was initialized during adapter_up, which will be called
every time a vf device is first brought up, or every time when device
is brought up again after bringing all devices down. This means our
state of previous list is lost, causing a memleak if entries are
present in the list. To fix that, move list init to the condition
that performs initial one time adapter setup.

Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
---
 drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
index ff84791..972dc7b 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
@@ -722,6 +722,10 @@ static int adapter_up(struct adapter *adapter)
 
 		if (adapter->flags & USING_MSIX)
 			name_msix_vecs(adapter);
+
+		/* Initialize hash mac addr list*/
+		INIT_LIST_HEAD(&adapter->mac_hlist);
+
 		adapter->flags |= FULL_INIT_DONE;
 	}
 
@@ -747,8 +751,6 @@ static int adapter_up(struct adapter *adapter)
 	enable_rx(adapter);
 	t4vf_sge_start(adapter);
 
-	/* Initialize hash mac addr list*/
-	INIT_LIST_HEAD(&adapter->mac_hlist);
 	return 0;
 }
 
-- 
1.8.3.1

Re: [PATCH net-next] cxgb4vf: fix memleak in mac_hlist initialization

[David Miller]

From: Arjun Vynipadath <arjun@chelsio.com>
Date: Fri,  9 Nov 2018 14:52:01 +0530

> mac_hlist was initialized during adapter_up, which will be called
> every time a vf device is first brought up, or every time when device
> is brought up again after bringing all devices down. This means our
> state of previous list is lost, causing a memleak if entries are
> present in the list. To fix that, move list init to the condition
> that performs initial one time adapter setup.
> 
> Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
> Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>

Applied.