[PATCH AUTOSEL 4.19 008/177] staging: rtl8192u: fix multiple memory leaks on error path

Sasha Levin
2019-12-10T21:32:38Z

From: Navid Emamdoost <navid.emamdoost@gmail.com>

[ Upstream commit ca312438cf176a16d4b89350cade8789ba8d7133 ]

In rtl8192_tx on error handling path allocated urbs and also skb should
be released.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Link: https://lore.kernel.org/r/20190920025137.29407-1-navid.emamdoost@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/staging/rtl8192u/r8192U_core.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index e218b5c20642d..2066a1d9bc84e 100644
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -1467,7 +1467,7 @@ short rtl8192_tx(struct net_device *dev, struct sk_buff *skb)
(struct tx_fwinfo_819x_usb *)(skb->data + USB_HWDESC_HEADER_LEN);
struct usb_device *udev = priv->udev;
int pend;
- int status;
+ int status, rt = -1;
struct urb *tx_urb = NULL, *tx_urb_zero = NULL;
unsigned int idx_pipe;

@@ -1611,8 +1611,10 @@ short rtl8192_tx(struct net_device *dev, struct sk_buff *skb)
}
if (bSend0Byte) {
tx_urb_zero = usb_alloc_urb(0, GFP_ATOMIC);
- if (!tx_urb_zero)
- return -ENOMEM;
+ if (!tx_urb_zero) {
+ rt = -ENOMEM;
+ goto error;
+ }
usb_fill_bulk_urb(tx_urb_zero, udev,
usb_sndbulkpipe(udev, idx_pipe),
&zero, 0, tx_zero_isr, dev);
@@ -1622,7 +1624,7 @@ short rtl8192_tx(struct net_device *dev, struct sk_buff *skb)
"Error TX URB for zero byte %d, error %d",
atomic_read(&priv->tx_pending[tcb_desc->queue_index]),
status);
- return -1;
+ goto error;
}
}
netif_trans_update(dev);
@@ -1633,7 +1635,12 @@ short rtl8192_tx(struct net_device *dev, struct sk_buff *skb)
RT_TRACE(COMP_ERR, "Error TX URB %d, error %d",
atomic_read(&priv->tx_pending[tcb_desc->queue_index]),
status);
- return -1;
+
+error:
+ dev_kfree_skb_any(skb);
+ usb_free_urb(tx_urb);
+ usb_free_urb(tx_urb_zero);
+ return rt;
}

static short rtl8192_usb_initendpoints(struct net_device *dev)
--
2.20.1