[PATCH] drm/radeon: Prefer strscpy over strlcpy in 'radeon_combios_get_power_modes'

[Srinivasan Shanmugam]

strlcpy() reads the entire source buffer first. This read may exceed the
destination size limit. This is both inefficient and can lead to linear
read overflows if a source string is not NUL-terminated. The safe
replacement is strscpy() [1].

cleanup to remove the strlcpy() function entirely from the kernel [2].

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89

Fixes the following:

WARNING: Prefer strscpy over strlcpy
+                               strlcpy(info.type, name, sizeof(info.type));

WARNING: Prefer strscpy over strlcpy
+                               strlcpy(info.type, name, sizeof(info.type));

Cc: Guchun Chen <guchun.chen at amd.com>
Cc: Christian König <christian.koenig at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
---
 drivers/gpu/drm/radeon/radeon_combios.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index 783a6b8802d5..795c3667f6d6 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -2702,7 +2702,7 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev)
 				struct i2c_board_info info = { };
 				const char *name = thermal_controller_names[thermal_controller];
 				info.addr = i2c_addr >> 1;
-				strlcpy(info.type, name, sizeof(info.type));
+				strscpy(info.type, name, sizeof(info.type));
 				i2c_new_client_device(&rdev->pm.i2c_bus->adapter, &info);
 			}
 		}
@@ -2719,7 +2719,7 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev)
 				struct i2c_board_info info = { };
 				const char *name = "f75375";
 				info.addr = 0x28;
-				strlcpy(info.type, name, sizeof(info.type));
+				strscpy(info.type, name, sizeof(info.type));
 				i2c_new_client_device(&rdev->pm.i2c_bus->adapter, &info);
 				DRM_INFO("Possible %s thermal controller at 0x%02x\n",
 					 name, info.addr);
-- 
2.25.1