* [PATCH] pinctrl: aspeed: Fix potential NULL dereference in aspeed_pinmux_set_mux()
@ 2022-04-21 2:26 Haowen Bai
2022-06-03 10:13 ` Linus Walleij
0 siblings, 1 reply; 2+ messages in thread
From: Haowen Bai @ 2022-04-21 2:26 UTC (permalink / raw)
To: Andrew Jeffery, Linus Walleij, Joel Stanley
Cc: Haowen Bai, linux-aspeed, openbmc, linux-gpio, linux-arm-kernel,
linux-kernel
pdesc could be null but still dereference pdesc->name and it will lead to
a null pointer access. So we move a null check before dereference.
Signed-off-by: Haowen Bai <baihaowen@meizu.com>
---
drivers/pinctrl/aspeed/pinctrl-aspeed.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed.c b/drivers/pinctrl/aspeed/pinctrl-aspeed.c
index c94e24aadf92..83d47ff1cea8 100644
--- a/drivers/pinctrl/aspeed/pinctrl-aspeed.c
+++ b/drivers/pinctrl/aspeed/pinctrl-aspeed.c
@@ -236,11 +236,11 @@ int aspeed_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned int function,
const struct aspeed_sig_expr **funcs;
const struct aspeed_sig_expr ***prios;
- pr_debug("Muxing pin %s for %s\n", pdesc->name, pfunc->name);
-
if (!pdesc)
return -EINVAL;
+ pr_debug("Muxing pin %s for %s\n", pdesc->name, pfunc->name);
+
prios = pdesc->prios;
if (!prios)
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] pinctrl: aspeed: Fix potential NULL dereference in aspeed_pinmux_set_mux()
2022-04-21 2:26 [PATCH] pinctrl: aspeed: Fix potential NULL dereference in aspeed_pinmux_set_mux() Haowen Bai
@ 2022-06-03 10:13 ` Linus Walleij
0 siblings, 0 replies; 2+ messages in thread
From: Linus Walleij @ 2022-06-03 10:13 UTC (permalink / raw)
To: Haowen Bai
Cc: Andrew Jeffery, Joel Stanley, linux-aspeed, openbmc, linux-gpio,
linux-arm-kernel, linux-kernel
On Thu, Apr 21, 2022 at 4:28 AM Haowen Bai <baihaowen@meizu.com> wrote:
> pdesc could be null but still dereference pdesc->name and it will lead to
> a null pointer access. So we move a null check before dereference.
>
> Signed-off-by: Haowen Bai <baihaowen@meizu.com>
Patch applied, sorry for missing it!
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 2+ messages in thread
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