Thread (423 messages) 423 messages, 2 authors, 2021-07-19
STALE1784d

[PATCH 4.19 157/421] ibmvnic: free tx_pool if tso_pool alloc fails

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-07-19 16:17:18
Also in: lkml
Subsystem: ibm power sriov virtual nic device driver, linux for powerpc (32-bit and 64-bit), networking drivers, the rest · Maintainers: Haren Myneni, Rick Lindsley, Madhavan Srinivasan, Michael Ellerman, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds

From: Sukadev Bhattiprolu <redacted>

[ Upstream commit f6ebca8efa52e4ae770f0325d618e7bcf08ada0c ]

Free tx_pool and clear it, if allocation of tso_pool fails.

release_tx_pools() assumes we have both tx and tso_pools if ->tx_pool is
non-NULL. If allocation of tso_pool fails in init_tx_pools(), the assumption
will not be true and we would end up dereferencing ->tx_buff, ->free_map
fields from a NULL pointer.

Fixes: 3205306c6b8d ("ibmvnic: Update TX pool initialization routine")
Signed-off-by: Sukadev Bhattiprolu <redacted>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 0eb06750a5d6..4008007c2e34 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -698,8 +698,11 @@ static int init_tx_pools(struct net_device *netdev)
 
 	adapter->tso_pool = kcalloc(tx_subcrqs,
 				    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
-	if (!adapter->tso_pool)
+	if (!adapter->tso_pool) {
+		kfree(adapter->tx_pool);
+		adapter->tx_pool = NULL;
 		return -1;
+	}
 
 	adapter->num_active_tx_pools = tx_subcrqs;
 
-- 
2.30.2


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