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Message-ID: <20230215223210.0b241a30@kernel.org> Date: Wed, 15 Feb 2023 22:32:10 -0800 From: Jakub Kicinski <kuba@...nel.org> To: Ido Schimmel <idosch@...dia.com> Cc: netdev@...r.kernel.org, davem@...emloft.net, pabeni@...hat.com, edumazet@...gle.com, jiri@...dia.com, jacob.e.keller@...el.com, sfr@...b.auug.org.au, mlxsw@...dia.com Subject: Re: [PATCH net] devlink: Fix netdev notifier chain corruption On Wed, 15 Feb 2023 09:31:39 +0200 Ido Schimmel wrote: > Cited commit changed devlink to register its netdev notifier block on > the global netdev notifier chain instead of on the per network namespace > one. > > However, when changing the network namespace of the devlink instance, > devlink still tries to unregister its notifier block from the chain of > the old namespace and register it on the chain of the new namespace. > This results in corruption of the notifier chains, as the same notifier > block is registered on two different chains: The global one and the per > network namespace one. In turn, this causes other problems such as the > inability to dismantle namespaces due to netdev reference count issues. Reviewed-by: Jakub Kicinski <kuba@...nel.org>
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