netdev - Re: [PATCH net] netfilter: nfnetlink: add a missing rcu_read

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Date:   Wed, 5 May 2021 17:25:44 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        Florian Westphal <fw@...len.de>,
        netfilter-devel@...r.kernel.org, netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        syzbot <syzkaller@...glegroups.com>
Subject: Re: [PATCH net] netfilter: nfnetlink: add a missing rcu_read_unlock()

On Wed, May 05, 2021 at 12:33:24AM -0700, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> Reported by syzbot :
> BUG: sleeping function called from invalid context at include/linux/sched/mm.h:201
> in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 26899, name: syz-executor.5
> 1 lock held by syz-executor.5/26899:
>  #0: ffffffff8bf797a0 (rcu_read_lock){....}-{1:2}, at: nfnetlink_get_subsys net/netfilter/nfnetlink.c:148 [inline]
>  #0: ffffffff8bf797a0 (rcu_read_lock){....}-{1:2}, at: nfnetlink_rcv_msg+0x1da/0x1300 net/netfilter/nfnetlink.c:226
[...]

Applied, thanks.