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[ Upstream commit 5bc46b49c828a6dfaab80b71ecb63fe76a1096d2 ] key_lookup() will always return a key, even if that key is revoked or invalidated. So check for invalid keys before continuing. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>