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Subject[PATCH] auxdisplay: use correct string length
Date
From: Xiongfeng Wang <xiongfeng.wang@linaro.org>

gcc-8 reports

drivers/auxdisplay/panel.c: In function 'panel_attach':
./include/linux/string.h:245:9: warning: '__builtin_strncpy' specified
bound 12 equals destination size [-Wstringop-truncation]

We need one less byte or call strlcpy() to make it a nul-terminated
string.

Signed-off-by: Xiongfeng Wang <xiongfeng.wang@linaro.org>
---
drivers/auxdisplay/panel.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c
index ea7869c..f8344e4 100644
--- a/drivers/auxdisplay/panel.c
+++ b/drivers/auxdisplay/panel.c
@@ -1506,10 +1506,10 @@ static struct logical_input *panel_bind_key(const char *name, const char *press,
key->rise_time = 1;
key->fall_time = 1;

- strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str));
- strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str));
+ strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str) - 1);
+ strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str) - 1);
strncpy(key->u.kbd.release_str, release,
- sizeof(key->u.kbd.release_str));
+ sizeof(key->u.kbd.release_str - 1));
list_add(&key->list, &logical_inputs);
return key;
}
--
1.8.3.1
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