cxgbi: fix uninitialized flowi6

BugLink: https://bugs.launchpad.net/bugs/1878232

commit 3d6d30d6 upstream.

ip6_route_output looks into different fields in the passed flowi6 structure,
yet cxgbi passes garbage in nearly all those fields. Zero the structure out
first.

Fixes: fc8d0590 ("libcxgbi: Add ipv6 api to driver")
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ian May <ian.may@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

drivers/scsi/cxgbi/libcxgbi.c

@@ -692,6 +692,7 @@ static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr,
 {
 	struct flowi6 fl;
 
+	memset(&fl, 0, sizeof(fl));
 	if (saddr)
 		memcpy(&fl.saddr, saddr, sizeof(struct in6_addr));
 	if (daddr)