This is a note to let you know that I've just added the patch titled
pinctrl: core: handle radix_tree_insert() errors in pinctrl_register_one_pin()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pinctrl-core-handle-radix_tree_insert-errors-in-pinctrl_register_one_pin.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ecfe9a015d3e1e46504d5b3de7eef1f2d186194a Mon Sep 17 00:00:00 2001
From: Sergey Shtylyov <s.shtylyov@xxxxxx>
Date: Wed, 19 Jul 2023 23:22:52 +0300
Subject: pinctrl: core: handle radix_tree_insert() errors in pinctrl_register_one_pin()
From: Sergey Shtylyov <s.shtylyov@xxxxxx>
commit ecfe9a015d3e1e46504d5b3de7eef1f2d186194a upstream.
pinctrl_register_one_pin() doesn't check the result of radix_tree_insert()
despite they both may return a negative error code. Linus Walleij said he
has copied the radix tree code from kernel/irq/ where the functions calling
radix_tree_insert() are *void* themselves; I think it makes more sense to
propagate the errors from radix_tree_insert() upstream if we can do that...
Found by Linux Verification Center (linuxtesting.org) with the Svace static
analysis tool.
Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxx>
Link: https://lore.kernel.org/r/20230719202253.13469-3-s.shtylyov@xxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: "Hemdan, Hagar Gamal Halim" <hagarhem@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pinctrl/core.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -205,6 +205,7 @@ static int pinctrl_register_one_pin(stru
const struct pinctrl_pin_desc *pin)
{
struct pin_desc *pindesc;
+ int error;
pindesc = pin_desc_get(pctldev, pin->number);
if (pindesc) {
@@ -226,18 +227,25 @@ static int pinctrl_register_one_pin(stru
} else {
pindesc->name = kasprintf(GFP_KERNEL, "PIN%u", pin->number);
if (!pindesc->name) {
- kfree(pindesc);
- return -ENOMEM;
+ error = -ENOMEM;
+ goto failed;
}
pindesc->dynamic_name = true;
}
pindesc->drv_data = pin->drv_data;
- radix_tree_insert(&pctldev->pin_desc_tree, pin->number, pindesc);
+ error = radix_tree_insert(&pctldev->pin_desc_tree, pin->number, pindesc);
+ if (error)
+ goto failed;
+
pr_debug("registered pin %d (%s) on %s\n",
pin->number, pindesc->name, pctldev->desc->name);
return 0;
+
+failed:
+ kfree(pindesc);
+ return error;
}
static int pinctrl_register_pins(struct pinctrl_dev *pctldev,
Patches currently in stable-queue which might be from s.shtylyov@xxxxxx are
queue-5.15/pinctrl-core-handle-radix_tree_insert-errors-in-pinctrl_register_one_pin.patch
