mwifiex: pcie: Fix memory leak in mwifiex_pcie_init_evt_ring

BugLink: https://bugs.launchpad.net/bugs/1858462

[ Upstream commit d10dcb61 ]

In mwifiex_pcie_init_evt_ring, a new skb is allocated which should be
released if mwifiex_map_pci_memory() fails. The release for skb and
card->evtbd_ring_vbase is added.

Fixes: 0732484b ("mwifiex: separate ring initialization and ring creation routines")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Acked-by: Ganapathi Bhat <gbhat@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Connor Kuehl <connor.kuehl@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

drivers/net/wireless/mwifiex/pcie.c

@@ -588,8 +588,11 @@ static int mwifiex_pcie_init_evt_ring(struct mwifiex_adapter *adapter)
 		skb_put(skb, MAX_EVENT_SIZE);
 
 		if (mwifiex_map_pci_memory(adapter, skb, MAX_EVENT_SIZE,
-					   PCI_DMA_FROMDEVICE))
+					   PCI_DMA_FROMDEVICE)) {
+			kfree_skb(skb);
+			kfree(card->evtbd_ring_vbase);
 			return -1;
+		}
 
 		buf_pa = MWIFIEX_SKB_DMA_ADDR(skb);