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kconfig: lxdialog: replace strcpy() with strncpy() in inputbox.c

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[ Upstream commit 5ac726653a1029a2eccba93bbe59e01fc9725828 ]

strcpy() performs no bounds checking and can lead to buffer overflows if
the input string exceeds the destination buffer size. This patch replaces
it with strncpy(), and null terminates the input string.

Signed-off-by: Suchit Karunakaran <suchitkarunakaran@gmail.com>
Reviewed-by: Nicolas Schier <nicolas.schier@linux.dev>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Suchit Karunakaran 2025-07-27 22:14:33 +05:30 • committed by Greg Kroah-Hartman
commit 6d150a1775
1 changed files with 4 additions and 2 deletions
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6
scripts/kconfig/lxdialog/inputbox.c
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@ -39,8 +39,10 @@ int dialog_inputbox(const char *title, const char *prompt, int height, int width
if (!init)
instr[0] = '\0';
else
strcpy(instr, init);
else {
strncpy(instr, init, sizeof(dialog_input_result) - 1);
instr[sizeof(dialog_input_result) - 1] = '\0';
}
do_resize:
if (getmaxy(stdscr) <= (height - INPUTBOX_HEIGTH_MIN))