netdev - Re: [PATCH net] ipv6: fix static key imbalance in fl

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Message-Id: <20190711.144411.1458652506187647731.davem@davemloft.net>
Date:   Thu, 11 Jul 2019 14:44:11 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com, willemb@...gle.com,
        syzkaller@...glegroups.com
Subject: Re: [PATCH net] ipv6: fix static key imbalance in fl_create()

From: Eric Dumazet <edumazet@...gle.com>
Date: Wed, 10 Jul 2019 06:40:11 -0700

> fl_create() should call static_branch_deferred_inc() only in
> case of success.
> 
> Also we should not call fl_free() in error path, as this could
> cause a static key imbalance.
 ...
> Fixes: 59c820b2317f ("ipv6: elide flowlabel check if no exclusive leases exist")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Acked-by: Willem de Bruijn <willemb@...gle.com>
> Reported-by: syzbot <syzkaller@...glegroups.com>

Applied.