[PATCH net-next] ibmvnic: Potential NULL dereference in clean_one_tx_pool()

Subsystems: ibm power sriov virtual nic device driver, linux for powerpc (32-bit and 64-bit), networking drivers, the rest

STALE3053d

3 messages, 3 authors, 2018-03-26 · open the first message on its own page

[PATCH net-next] ibmvnic: Potential NULL dereference in clean_one_tx_pool()

From: Dan Carpenter <hidden>
Date: 2018-03-23 11:36:39

There is an && vs || typo here, which potentially leads to a NULL
dereference.

Fixes: e9e1e97884b7 ("ibmvnic: Update TX pool cleaning routine")
Signed-off-by: Dan Carpenter <redacted>
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 5632c030811b..0389a7a52152 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1135,7 +1135,7 @@ static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
 	u64 tx_entries;
 	int i;
 
-	if (!tx_pool && !tx_pool->tx_buff)
+	if (!tx_pool || !tx_pool->tx_buff)
 		return;
 
 	tx_entries = tx_pool->num_buffers;

Re: [PATCH net-next] ibmvnic: Potential NULL dereference in clean_one_tx_pool()

From: Thomas Falcon <hidden>
Date: 2018-03-23 15:06:32

On 03/23/2018 06:36 AM, Dan Carpenter wrote:
There is an && vs || typo here, which potentially leads to a NULL
dereference.
Thanks for catching that!
quoted hunk
Fixes: e9e1e97884b7 ("ibmvnic: Update TX pool cleaning routine")
Signed-off-by: Dan Carpenter <redacted>
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 5632c030811b..0389a7a52152 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1135,7 +1135,7 @@ static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
 	u64 tx_entries;
 	int i;

-	if (!tx_pool && !tx_pool->tx_buff)
+	if (!tx_pool || !tx_pool->tx_buff)
 		return;

 	tx_entries = tx_pool->num_buffers;

Re: [PATCH net-next] ibmvnic: Potential NULL dereference in clean_one_tx_pool()

From: David Miller <davem@davemloft.net>
Date: 2018-03-26 01:14:24

From: Dan Carpenter <redacted>
Date: Fri, 23 Mar 2018 14:36:15 +0300
There is an && vs || typo here, which potentially leads to a NULL
dereference.

Fixes: e9e1e97884b7 ("ibmvnic: Update TX pool cleaning routine")
Signed-off-by: Dan Carpenter <redacted>
Applied, thanks Dan.
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