linux-kernel - [PATCH] kconfig/lxdialog: replace strcpy() with strscpy() in inputbox.c

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Message-Id: <20250725055928.37658-1-suchitkarunakaran@gmail.com>
Date: Fri, 25 Jul 2025 11:29:28 +0530
From: Suchit Karunakaran <suchitkarunakaran@...il.com>
To: masahiroy@...nel.org,
	linux-kbuild@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	skhan@...uxfoundation.org,
	Suchit Karunakaran <suchitkarunakaran@...il.com>
Subject: [PATCH] kconfig/lxdialog: replace strcpy() with strscpy() in inputbox.c

strcpy() performs no bounds checking and can lead to buffer overflows if
the input string exceeds the destination buffer size. Replace it with
strscpy(), which ensures the input is always NULL-terminated and
prevents overflows.

Signed-off-by: Suchit Karunakaran <suchitkarunakaran@...il.com>
---
 scripts/kconfig/lxdialog/inputbox.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/kconfig/lxdialog/inputbox.c b/scripts/kconfig/lxdialog/inputbox.c
index 3c6e24b20f5b..8880ccaffa0b 100644
--- a/scripts/kconfig/lxdialog/inputbox.c
+++ b/scripts/kconfig/lxdialog/inputbox.c
@@ -40,7 +40,7 @@ int dialog_inputbox(const char *title, const char *prompt, int height, int width
 	if (!init)
 		instr[0] = '\0';
 	else
-		strcpy(instr, init);
+		strscpy(instr, init, MAX_LEN + 1);
 
 do_resize:
 	if (getmaxy(stdscr) <= (height - INPUTBOX_HEIGHT_MIN))
-- 
2.39.5