netdev - Re: [PATCH v2 net] ipv6: flowlabel: fl6_sock_lookup() must use atomic_inc_not

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Message-Id: <20190609.130808.145089119500423309.davem@davemloft.net>
Date:   Sun, 09 Jun 2019 13:08:08 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com, willemb@...gle.com
Subject: Re: [PATCH v2 net] ipv6: flowlabel: fl6_sock_lookup() must use
 atomic_inc_not_zero

From: Eric Dumazet <edumazet@...gle.com>
Date: Thu,  6 Jun 2019 14:32:34 -0700

> Before taking a refcount, make sure the object is not already
> scheduled for deletion.
> 
> Same fix is needed in ipv6_flowlabel_opt()
> 
> Fixes: 18367681a10b ("ipv6 flowlabel: Convert np->ipv6_fl_list to RCU.")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied and queued up for -stable.