4.19-stable review patch. If anyone has any objections, please let me know.
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[ 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 dan.carpenter@oracle.com Signed-off-by: Stephen Boyd sboyd@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/mvebu/cp110-system-controller.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/clk/mvebu/cp110-system-controller.c b/drivers/clk/mvebu/cp110-system-controller.c index 75bf7b8f282f..0153c76d4a20 100644 --- a/drivers/clk/mvebu/cp110-system-controller.c +++ b/drivers/clk/mvebu/cp110-system-controller.c @@ -202,11 +202,11 @@ static struct clk_hw *cp110_of_clk_get(struct of_phandle_args *clkspec, 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->hws[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->hws[CP110_MAX_CORE_CLOCKS + idx]; }