linux-hardening - [PATCH v3] thermal/debugfs: change kzalloc to kcalloc

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Message-ID: <dmv2euctawmijgffigu7qr4yn7jtby4afuy5fgymq6s35c5elu@inovmydfkaez>
Date: Sun, 19 Jan 2025 13:34:58 -0500
From: Ethan Carter Edwards <ethan@...ancedwards.com>
To: "rafael@...nel.org" <rafael@...nel.org>
Cc: "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>, 
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
	"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, 
	"linux-hardening@...r.kernel.org" <linux-hardening@...r.kernel.org>
Subject: [PATCH v3] thermal/debugfs: change kzalloc to kcalloc

We are replacing any instances of kzalloc(size * count, ...) with
kcalloc(count, size, ...) due to risk of overflow [1].

[1] https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments
Link: https://github.com/KSPP/linux/issues/162

Signed-off-by: Ethan Carter Edwards <ethan@...ancedwards.com>
---
 v3: fix description and email client formatting
 v2: fix typo
 drivers/thermal/thermal_debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thermal/thermal_debugfs.c b/drivers/thermal/thermal_debugfs.c
index c800504c3cfe..29dc1431a252 100644
--- a/drivers/thermal/thermal_debugfs.c
+++ b/drivers/thermal/thermal_debugfs.c
@@ -876,7 +876,7 @@ void thermal_debug_tz_add(struct thermal_zone_device *tz)
 
 	tz_dbg->tz = tz;
 
-	tz_dbg->trips_crossed = kzalloc(sizeof(int) * tz->num_trips, GFP_KERNEL);
+	tz_dbg->trips_crossed = kcalloc(tz->num_trips, sizeof(int), GFP_KERNEL);
 	if (!tz_dbg->trips_crossed) {
 		thermal_debugfs_remove_id(thermal_dbg);
 		return;
-- 
2.47.1