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.a...@ericsson.com> Acked-by: Jon Maloy <jon.ma...@ericsson.com> Reviewed-by: Erik Hugne <erik.hu...@gmail.com> --- net/tipc/node.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/tipc/node.c b/net/tipc/node.c index cdb7950..590d597 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -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); } -- 2.1.4