[PATCH] drm/modes: Fix unterminated strncpy

[Chuhong Yuan]

strncpy(dest, src, strlen(src)) leads to unterminated
dest, which is dangerous.
Fix it by using strscpy.

Signed-off-by: Chuhong Yuan <hsleste...@gmail.com>
---
 drivers/gpu/drm/drm_modes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 80fcd5dc1558..170fc24e0f31 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1770,7 +1770,7 @@ bool drm_mode_parse_command_line_for_connector(const char 
*mode_option,
        }
 
        if (named_mode) {
-               strncpy(mode->name, name, mode_end);
+               strscpy(mode->name, name, mode_end + 1);
        } else {
                ret = drm_mode_parse_cmdline_res_mode(name, mode_end,
                                                      parse_extras,
-- 
2.20.1