Commit 47dffc75 authored by Jesper Juhl's avatar Jesper Juhl Committed by David S. Miller

cdc-phonet: Don't leak in usbpn_open

We allocate memory for 'req' with usb_alloc_urb() and then test
'if (!req || rx_submit(pnd, req, GFP_KERNEL | __GFP_COLD))'.
If we enter that branch due to '!req' then there is no problem. But if
we enter the branch due to 'req' being != 0 and the 'rx_submit()' call
being false, then we'll leak the memory we allocated.
Deal with the leak by always calling 'usb_free_urb(req)' when entering
the branch. If 'req' happens to be 0 then the call is harmless, if it
is not 0 then we free the memory we allocated but don't need.
Signed-off-by: default avatarJesper Juhl <jj@chaosbits.net>
Acked-by: default avatarRémi Denis-Courmont <remi@remlab.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 155e4e12
...@@ -232,6 +232,7 @@ static int usbpn_open(struct net_device *dev) ...@@ -232,6 +232,7 @@ static int usbpn_open(struct net_device *dev)
struct urb *req = usb_alloc_urb(0, GFP_KERNEL); struct urb *req = usb_alloc_urb(0, GFP_KERNEL);
if (!req || rx_submit(pnd, req, GFP_KERNEL | __GFP_COLD)) { if (!req || rx_submit(pnd, req, GFP_KERNEL | __GFP_COLD)) {
usb_free_urb(req);
usbpn_close(dev); usbpn_close(dev);
return -ENOMEM; return -ENOMEM;
} }
......
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