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As kcalloc may return NULL pointer, the return value should be checked and return error if fails as same as the ones in alauda_read_map. Fixes: e80b0fade09e ("[PATCH] USB Storage: add alauda support") Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> Link: https://lore.kernel.org/r/20221208110058.12983-1-jiasheng@iscas.ac.cn Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>