diff options
| author | Peilin Ye <peilin.ye@bytedance.com> | 2022-09-23 07:25:51 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-09-26 21:23:22 +0300 |
| commit | a43206156263fbaf1f2b7f96257441f331e91bb7 (patch) | |
| tree | a511ad087e03a07f34980921185d2eae6298c8da /drivers/net/usb | |
| parent | 6052a4c11fd893234e085edf7bf2e00a33a79d4e (diff) | |
| download | linux-a43206156263fbaf1f2b7f96257441f331e91bb7.tar.xz | |
usbnet: Fix memory leak in usbnet_disconnect()
Currently usbnet_disconnect() unanchors and frees all deferred URBs
using usb_scuttle_anchored_urbs(), which does not free urb->context,
causing a memory leak as reported by syzbot.
Use a usb_get_from_anchor() while loop instead, similar to what we did
in commit 19cfe912c37b ("Bluetooth: btusb: Fix memory leak in
play_deferred"). Also free urb->sg.
Reported-and-tested-by: syzbot+dcd3e13cf4472f2e0ba1@syzkaller.appspotmail.com
Fixes: 69ee472f2706 ("usbnet & cdc-ether: Autosuspend for online devices")
Fixes: 638c5115a794 ("USBNET: support DMA SG")
Signed-off-by: Peilin Ye <peilin.ye@bytedance.com>
Link: https://lore.kernel.org/r/20220923042551.2745-1-yepeilin.cs@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/usb')
| -rw-r--r-- | drivers/net/usb/usbnet.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index aaa89b4cfd50..e368b0780753 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1598,6 +1598,7 @@ void usbnet_disconnect (struct usb_interface *intf) struct usbnet *dev; struct usb_device *xdev; struct net_device *net; + struct urb *urb; dev = usb_get_intfdata(intf); usb_set_intfdata(intf, NULL); @@ -1614,7 +1615,11 @@ void usbnet_disconnect (struct usb_interface *intf) net = dev->net; unregister_netdev (net); - usb_scuttle_anchored_urbs(&dev->deferred); + while ((urb = usb_get_from_anchor(&dev->deferred))) { + dev_kfree_skb(urb->context); + kfree(urb->sg); + usb_free_urb(urb); + } if (dev->driver_info->unbind) dev->driver_info->unbind(dev, intf); |