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authorDan Carpenter <dan.carpenter@oracle.com>2018-12-03 17:50:55 +0300
committerStephen Boyd <sboyd@kernel.org>2018-12-03 20:54:48 +0300
commitd9f5b7f5dd0fa74a89de5a7ac1e26366f211ccee (patch)
tree330ad61d8ab70cba2b2769d41e58823258157b32 /drivers/clk/mvebu
parentd206e6b7ea3fdc8ec8f6be9a2ecfe58142b49e37 (diff)
downloadlinux-d9f5b7f5dd0fa74a89de5a7ac1e26366f211ccee.tar.xz
clk: mvebu: Off by one bugs in cp110_of_clk_get()
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>
Diffstat (limited to 'drivers/clk/mvebu')
-rw-r--r--drivers/clk/mvebu/cp110-system-controller.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/clk/mvebu/cp110-system-controller.c b/drivers/clk/mvebu/cp110-system-controller.c
index 9781b1bf5998..9235a331b588 100644
--- a/drivers/clk/mvebu/cp110-system-controller.c
+++ b/drivers/clk/mvebu/cp110-system-controller.c
@@ -200,11 +200,11 @@ 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];
}