This is a note to let you know that I've just added the patch titled
pinctrl: ralink: Check for null return of devm_kcalloc
to the 5.18-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-ralink-check-for-null-return-of-devm_kcalloc.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fca1b7c10ba41f30f82bf0da0192a500718d82b2
Author: William Dean <williamsukatube@xxxxxxxxx>
Date: Sun Jul 10 23:49:22 2022 +0800
pinctrl: ralink: Check for null return of devm_kcalloc
[ Upstream commit c3b821e8e406d5650e587b7ac624ac24e9b780a8 ]
Because of the possible failure of the allocation, data->domains might
be NULL pointer and will cause the dereference of the NULL pointer
later.
Therefore, it might be better to check it and directly return -ENOMEM
without releasing data manually if fails, because the comment of the
devm_kmalloc() says "Memory allocated with this function is
automatically freed on driver detach.".
Fixes: a86854d0c599b ("treewide: devm_kzalloc() -> devm_kcalloc()")
Reported-by: Hacash Robot <hacashRobot@xxxxxxxxxxx>
Signed-off-by: William Dean <williamsukatube@xxxxxxxxx>
Link: https://lore.kernel.org/r/20220710154922.2610876-1-williamsukatube@xxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pinctrl/ralink/pinctrl-ralink.c b/drivers/pinctrl/ralink/pinctrl-ralink.c
index 841f23f55c95..3a8268a43d74 100644
--- a/drivers/pinctrl/ralink/pinctrl-ralink.c
+++ b/drivers/pinctrl/ralink/pinctrl-ralink.c
@@ -266,6 +266,8 @@ static int ralink_pinmux_pins(struct ralink_priv *p)
p->func[i]->pin_count,
sizeof(int),
GFP_KERNEL);
+ if (!p->func[i]->pins)
+ return -ENOMEM;
for (j = 0; j < p->func[i]->pin_count; j++)
p->func[i]->pins[j] = p->func[i]->pin_first + j;
