Commit 2837f39c authored Mar 03, 2016 by Richard Alpe Committed by David S. Miller Mar 06, 2016

tipc: don't check link reset on non existing link



Make sure we have a link before checking if it has been reset or not.

Prior to this patch tipc_link_is_reset() could be called with a non
existing link, resulting in a null pointer dereference.

Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 9b300960

net/tipc/node.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -843,7 +843,7 @@ void tipc_node_check_dest(struct net *net, u32 onode,
		memcpy(&le->maddr, maddr, sizeof(*maddr));
		exit:
		tipc_node_write_unlock(n);
		if (reset && !tipc_link_is_reset(l))
		if (reset && l && !tipc_link_is_reset(l))
		tipc_node_link_down(n, b->identity, false);
		tipc_node_put(n);
		}