linux-kernel - [PATCH RESEND 2/2] pinctrl: core: reset gpio_device in loop in pinctrl_pins

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <c40d0634abefa19e689ffd450e0f48a8d63c4fc4.1714049455.git.lduboin@freebox.fr>
Date: Fri, 10 May 2024 18:25:39 +0200
From: Léo DUBOIN <lduboin@...ebox.fr>
To: linus.walleij@...aro.org
Cc: linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Léo DUBOIN <lduboin@...ebox.fr>
Subject: [PATCH RESEND 2/2] pinctrl: core: reset gpio_device in loop in pinctrl_pins_show()

We were not resetting the pointer to the associated gpio_device once
we are done displaying a pin's information.

This meant that once we reached the end of a gpio-range, if there
were pins right after it that did not belong to any known range,
they would be associated with the previous range's gpio device.

This resulted in those pins appearing as <4294966783:old_gdev> instead
of the expected <0:?> (due to gpio_num being -1).

Signed-off-by: Léo DUBOIN <lduboin@...ebox.fr>
---
 drivers/pinctrl/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 901f2f9bf850..ad878196ada9 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -1670,6 +1670,7 @@ static int pinctrl_pins_show(struct seq_file *s, void *what)
 		seq_printf(s, "pin %d (%s) ", pin, desc->name);

 #ifdef CONFIG_GPIOLIB
+		gdev = NULL;
 		gpio_num = -1;
 		list_for_each_entry(range, &pctldev->gpio_ranges, node) {
 			if (range->pins != NULL) {
-- 
2.42.0