netdev - Re: [PATCH v3 net-next] ipv4: convert dst_metrics.refcnt from atomic_t to refcount

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Message-Id: <20170818.151424.887124840705267368.davem@davemloft.net>
Date:   Fri, 18 Aug 2017 15:14:24 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     eric.dumazet@...il.com
Cc:     netdev@...r.kernel.org, xiyou.wangcong@...il.com
Subject: Re: [PATCH v3 net-next] ipv4: convert dst_metrics.refcnt from
 atomic_t to refcount_t

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Fri, 18 Aug 2017 12:08:07 -0700

> From: Eric Dumazet <edumazet@...gle.com>
> 
> refcount_t type and corresponding API should be
> used instead of atomic_t when the variable is used as
> a reference counter. This allows to avoid accidental
> refcounter overflows that might lead to use-after-free
> situations.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
> v3: added the include <linux/refcount.h> to be safe (Cong Wang)
> v2: fix a missing change in net/ipv4/fib_semantics.c

Applied, thanks Eric.