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[ Upstream commit886e44c929] As the potential failure of the kvmalloc_array(), it should be better to check and restore the 'data' if fails in order to avoid the dereference of the NULL pointer. Fixes:6ae7467112("hv_netvsc: Add per-cpu ethtool stats for netvsc") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> Link: https://lore.kernel.org/r/20220314020125.2365084-1-jiasheng@iscas.ac.cn Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>