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Date: Fri, 15 Apr 2022 10:00:11 +0000 From: patchwork-bot+netdevbpf@...nel.org To: David Howells <dhowells@...hat.com> Cc: netdev@...r.kernel.org, edumazet@...gle.com, marc.dionne@...istor.com, linux-afs@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH net] rxrpc: Restore removed timer deletion Hello: This patch was applied to netdev/net.git (master) by David S. Miller <davem@...emloft.net>: On Wed, 13 Apr 2022 11:16:25 +0100 you wrote: > A recent patch[1] from Eric Dumazet flipped the order in which the > keepalive timer and the keepalive worker were cancelled in order to fix a > syzbot reported issue[2]. Unfortunately, this enables the mirror image bug > whereby the timer races with rxrpc_exit_net(), restarting the worker after > it has been cancelled: > > CPU 1 CPU 2 > =============== ===================== > if (rxnet->live) > <INTERRUPT> > rxnet->live = false; > cancel_work_sync(&rxnet->peer_keepalive_work); > rxrpc_queue_work(&rxnet->peer_keepalive_work); > del_timer_sync(&rxnet->peer_keepalive_timer); > > [...] Here is the summary with links: - [net] rxrpc: Restore removed timer deletion https://git.kernel.org/netdev/net/c/ee3b0826b476 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html
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