linux-kernel - [PATCH] platform/x86: thinkpad-acpi: replace strcpy with strscpy

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Message-ID: <20250107021507.4786-1-nitjoshi@gmail.com>
Date: Tue,  7 Jan 2025 11:15:07 +0900
From: Nitin Joshi <nitjoshi@...il.com>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Hans de Goede <hdegoede@...hat.com>
Cc: Mark Pearson <mpearson-lenovo@...ebb.ca>,
	platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Nitin Joshi <nitjoshi@...il.com>
Subject: [PATCH] platform/x86: thinkpad-acpi: replace strcpy with strscpy

strcpy() performs no bounds checking on the destination buffer. This
could result in linear overflows beyond the end of the buffer, leading
to all kinds of misbehaviors.[1]

[1]: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy

Signed-off-by: Nitin Joshi <nitjoshi@...il.com>
---
 drivers/platform/x86/thinkpad_acpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 2cfb2ac3f465..c9e2dfb942ec 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -11681,7 +11681,7 @@ static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
 		if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
 			if (strlen(val) > sizeof(ibms_init[i].param) - 1)
 				return -ENOSPC;
-			strcpy(ibms_init[i].param, val);
+			strscpy(ibms_init[i].param, val);
 			return 0;
 		}
 	}
-- 
2.43.0