netdev - Re: [PATCH net] ipv6: fix suspicious RCU usage in rt6_dump

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Message-Id: <20190626.090850.689822675524126526.davem@davemloft.net>
Date:   Wed, 26 Jun 2019 09:08:50 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com, sbrivio@...hat.com,
        dsahern@...il.com
Subject: Re: [PATCH net] ipv6: fix suspicious RCU usage in rt6_dump_route()

From: Eric Dumazet <edumazet@...gle.com>
Date: Wed, 26 Jun 2019 03:05:28 -0700

> syzbot reminded us that rt6_nh_dump_exceptions() needs to be called
> with rcu_read_lock()
> 
> net/ipv6/route.c:1593 suspicious rcu_dereference_check() usage!
> 
> other info that might help us debug this:
...
> Fixes: 1e47b4837f3b ("ipv6: Dump route exceptions if requested")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Stefano Brivio <sbrivio@...hat.com>
> Cc: David Ahern <dsahern@...il.com>

Applied.