Commit 7f05b467 authored Dec 19, 2017 by Shannon Nelson Committed by Steffen Klassert Dec 21, 2017

xfrm: check for xdo_dev_state_free



The current XFRM code assumes that we've implemented the
xdo_dev_state_free() callback, even if it is meaningless to the driver.
This patch adds a check for it before calling, as done in other APIs,
to prevent a NULL function pointer kernel crash.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

parent f58869c4

include/net/xfrm.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -1933,6 +1933,7 @@ static inline void xfrm_dev_state_free(struct xfrm_state *x)
		struct net_device *dev = xso->dev;

		if (dev && dev->xfrmdev_ops) {
		if (dev->xfrmdev_ops->xdo_dev_state_free)
		dev->xfrmdev_ops->xdo_dev_state_free(x);
		xso->dev = NULL;
		dev_put(dev);