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20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
30 lines
1003 B
Diff
30 lines
1003 B
Diff
From f8740e21bb2a6eb11da683901e22fbb6fea80dc8 Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Tue, 5 Apr 2022 15:20:27 +0200
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Subject: [PATCH] clk: Test the clock pointer in clk_hw_get_name()
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Unlike __clk_get_name(), clk_hw_get_name() doesn't test wether passed
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clk_hw pointer is NULL or not and dereferences it directly. This can
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then lead to NULL pointer dereference.
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Let's make sure the pointer isn't NULL before dereferencing it.
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Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com> # imx8mp
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Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> # exynos4210, meson g12b
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/clk/clk.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/clk/clk.c
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+++ b/drivers/clk/clk.c
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@@ -269,7 +269,7 @@ EXPORT_SYMBOL_GPL(__clk_get_name);
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const char *clk_hw_get_name(const struct clk_hw *hw)
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{
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- return hw->core->name;
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+ return !hw ? NULL : hw->core->name;
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}
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EXPORT_SYMBOL_GPL(clk_hw_get_name);
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