From 38391d6b11449ee86e3f6af003e4218ab95d3bec Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Mon, 3 Dec 2018 17:50:55 +0300 Subject: clk: mvebu: Off by one bugs in cp110_of_clk_get() [ Upstream commit d9f5b7f5dd0fa74a89de5a7ac1e26366f211ccee ] These > comparisons should be >= to prevent reading beyond the end of of the clk_data->hws[] buffer. The clk_data->hws[] array is allocated in cp110_syscon_common_probe() when we do: cp110_clk_data = devm_kzalloc(dev, sizeof(*cp110_clk_data) + sizeof(struct clk_hw *) * CP110_CLK_NUM, GFP_KERNEL); As you can see, it has CP110_CLK_NUM elements which is equivalent to CP110_MAX_CORE_CLOCKS + CP110_MAX_GATABLE_CLOCKS. Fixes: d3da3eaef7f4 ("clk: mvebu: new driver for Armada CP110 system controller") Signed-off-by: Dan Carpenter Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/mvebu/cp110-system-controller.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/clk/mvebu') diff --git a/drivers/clk/mvebu/cp110-system-controller.c b/drivers/clk/mvebu/cp110-system-controller.c index f2303da7fda7..465953c75320 100644 --- a/drivers/clk/mvebu/cp110-system-controller.c +++ b/drivers/clk/mvebu/cp110-system-controller.c @@ -172,11 +172,11 @@ static struct clk *cp110_of_clk_get(struct of_phandle_args *clkspec, void *data) unsigned int idx = clkspec->args[1]; if (type == CP110_CLK_TYPE_CORE) { - if (idx > CP110_MAX_CORE_CLOCKS) + if (idx >= CP110_MAX_CORE_CLOCKS) return ERR_PTR(-EINVAL); return clk_data->clks[idx]; } else if (type == CP110_CLK_TYPE_GATABLE) { - if (idx > CP110_MAX_GATABLE_CLOCKS) + if (idx >= CP110_MAX_GATABLE_CLOCKS) return ERR_PTR(-EINVAL); return clk_data->clks[CP110_MAX_CORE_CLOCKS + idx]; } -- cgit v1.2.3