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authorDean Jenkins <Dean_Jenkins@mentor.com>2017-08-07 09:50:16 +0100
committerDavid S. Miller <davem@davemloft.net>2017-08-07 10:10:19 -0700
commitd0c8f338ab41438bdf8472cb4209d4ab54d439d5 (patch)
treeafd69174d5166583e8f7a2c6d36b6c4247a7a077 /drivers/net/usb/asix_common.c
parent960eb4eeaa47a3a5061a4e47e28411e85840ab2c (diff)
asix: Fix small memory leak in ax88772_unbind()
When Ethernet frames span mulitple URBs, the netdev buffer memory pointed to by the asix_rx_fixup_info structure remains allocated during the time gap between the 2 executions of asix_rx_fixup_internal(). This means that if ax88772_unbind() is called within this time gap to free the memory of the parent private data structure then a memory leak of the part filled netdev buffer memory will occur. Therefore, create a new function asix_rx_fixup_common_free() to free the memory of the netdev buffer and add a call to asix_rx_fixup_common_free() from inside ax88772_unbind(). Consequently when an unbind occurs part way through receiving an Ethernet frame, the netdev buffer memory that is holding part of the received Ethernet frame will now be freed. Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/asix_common.c')
-rw-r--r--drivers/net/usb/asix_common.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
index fda74f33e3ec..522d2900cd1d 100644
--- a/drivers/net/usb/asix_common.c
+++ b/drivers/net/usb/asix_common.c
@@ -210,6 +210,21 @@ int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb)
return asix_rx_fixup_internal(dev, skb, rx);
}
+void asix_rx_fixup_common_free(struct asix_common_private *dp)
+{
+ struct asix_rx_fixup_info *rx;
+
+ if (!dp)
+ return;
+
+ rx = &dp->rx_fixup_info;
+
+ if (rx->ax_skb) {
+ kfree_skb(rx->ax_skb);
+ rx->ax_skb = NULL;
+ }
+}
+
struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
gfp_t flags)
{