diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0857-clk-Test-the-clock-pointer-in-clk_hw_get_name.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0857-clk-Test-the-clock-pointer-in-clk_hw_get_name.patch | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0857-clk-Test-the-clock-pointer-in-clk_hw_get_name.patch b/target/linux/bcm27xx/patches-5.15/950-0857-clk-Test-the-clock-pointer-in-clk_hw_get_name.patch new file mode 100644 index 0000000000..dcb41f9032 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0857-clk-Test-the-clock-pointer-in-clk_hw_get_name.patch @@ -0,0 +1,29 @@ +From f8740e21bb2a6eb11da683901e22fbb6fea80dc8 Mon Sep 17 00:00:00 2001 +From: Maxime Ripard <maxime@cerno.tech> +Date: Tue, 5 Apr 2022 15:20:27 +0200 +Subject: [PATCH] clk: Test the clock pointer in clk_hw_get_name() + +Unlike __clk_get_name(), clk_hw_get_name() doesn't test wether passed +clk_hw pointer is NULL or not and dereferences it directly. This can +then lead to NULL pointer dereference. + +Let's make sure the pointer isn't NULL before dereferencing it. + +Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com> # imx8mp +Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> # exynos4210, meson g12b +Signed-off-by: Maxime Ripard <maxime@cerno.tech> +--- + drivers/clk/clk.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/clk/clk.c ++++ b/drivers/clk/clk.c +@@ -269,7 +269,7 @@ EXPORT_SYMBOL_GPL(__clk_get_name); + + const char *clk_hw_get_name(const struct clk_hw *hw) + { +- return hw->core->name; ++ return !hw ? NULL : hw->core->name; + } + EXPORT_SYMBOL_GPL(clk_hw_get_name); + |