From e70a3aad44cc8b24986687ffc98c4a4f6ecf25ea Mon Sep 17 00:00:00 2001 From: Cong Wang Date: Thu, 2 Aug 2018 23:20:38 -0700 Subject: [PATCH] ipv6: fix double refcount of fib6_metrics All the callers of ip6_rt_copy_init()/rt6_set_from() hold refcnt of the "from" fib6_info, so there is no need to hold fib6_metrics refcnt again, because fib6_metrics refcnt is only released when fib6_info is gone, that is, they have the same life time, so the whole fib6_metrics refcnt can be removed actually. This fixes a kmemleak warning reported by Sabrina. Fixes: 93531c674315 ("net/ipv6: separate handling of FIB entries from dst based routes") Reported-by: Sabrina Dubroca Cc: Sabrina Dubroca Cc: David Ahern Signed-off-by: Cong Wang Signed-off-by: David S. Miller --- net/ipv6/route.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index ec18b3ce8b6d..7208c16302f6 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -978,10 +978,6 @@ static void rt6_set_from(struct rt6_info *rt, struct fib6_info *from) rt->rt6i_flags &= ~RTF_EXPIRES; rcu_assign_pointer(rt->from, from); dst_init_metrics(&rt->dst, from->fib6_metrics->metrics, true); - if (from->fib6_metrics != &dst_default_metrics) { - rt->dst._metrics |= DST_METRICS_REFCOUNTED; - refcount_inc(&from->fib6_metrics->refcnt); - } } /* Caller must already hold reference to @ort */ -- 2.30.2