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| author |   Cong Wang <xiyou.wangcong@gmail.com> | 2018-08-02 23:20:38 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-08-05 17:22:45 -0700 |
| commit | e70a3aad44cc8b24986687ffc98c4a4f6ecf25ea (patch) | |
| tree | 5789fc559dc1882181c7e70a74406247cc945f7d /net/ipv6/route.c | |
| parent | Linux 4.18-rc8 (diff) | |
| download | linux-dev-e70a3aad44cc8b24986687ffc98c4a4f6ecf25ea.tar.xz linux-dev-e70a3aad44cc8b24986687ffc98c4a4f6ecf25ea.zip | |
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 <sd@queasysnail.net>
Cc: Sabrina Dubroca <sd@queasysnail.net>
Cc: David Ahern <dsahern@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | net/ipv6/route.c | 4 |
1 files changed, 0 insertions, 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 */ |