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authorBjørn Mork <bjorn@mork.no>2013-01-28 23:51:28 +0000
committerDavid S. Miller <davem@davemloft.net>2013-01-30 17:35:44 -0500
commit70c37bf97f2a91accba76080db69144f3b69f736 (patch)
tree2c5b72a06bba90a0cfbf4b1ae93c4ba5d41278ef /include
parent6cdd20c380eb62eab757c5a6ccc90dac7ecd774b (diff)
downloadlinux-70c37bf97f2a91accba76080db69144f3b69f736.tar.gz
net: usbnet: prevent buggy devices from killing us
A device sending 0 length frames as fast as it can has been observed killing the host system due to the resulting memory pressure. Temporarily disable RX skb allocation and URB submission when the current error ratio is high, preventing us from trying to allocate an infinite number of skbs. Reenable as soon as we are finished processing the done queue, allowing the device to continue working after short error bursts. Signed-off-by: Bjørn Mork <bjorn@mork.no> Acked-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/usb/usbnet.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index 5de7a220e98..0de078d4cdb 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -33,6 +33,7 @@ struct usbnet {
wait_queue_head_t *wait;
struct mutex phy_mutex;
unsigned char suspend_count;
+ unsigned char pkt_cnt, pkt_err;
/* i/o info: pipes etc */
unsigned in, out;
@@ -70,6 +71,7 @@ struct usbnet {
# define EVENT_DEV_OPEN 7
# define EVENT_DEVICE_REPORT_IDLE 8
# define EVENT_NO_RUNTIME_PM 9
+# define EVENT_RX_KILL 10
};
static inline struct usb_driver *driver_of(struct usb_interface *intf)