From 336fd4f5f25157e9e8bd50e898a1bbcd99eaea46 Mon Sep 17 00:00:00 2001 From: Xiongfeng Wang Date: Tue, 9 Jan 2018 20:23:32 +0800 Subject: [PATCH] HID: uhid: use strlcpy() instead of strncpy() gcc-8 reports drivers/hid/uhid.c: In function 'uhid_dev_create2': ./include/linux/string.h:245:9: warning: '__builtin_strncpy' output may be truncated copying 127 bytes from a string of length 127 [-Wstringop-truncation] The compiler require that the input param 'len' of strncpy() should be greater than the length of the src string, so that '\0' is copied as well. We can just use strlcpy() to avoid this warning. Signed-off-by: Xiongfeng Wang Signed-off-by: Jiri Kosina --- drivers/hid/uhid.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c index fc43850a155e..39b60e531183 100644 --- a/drivers/hid/uhid.c +++ b/drivers/hid/uhid.c @@ -496,12 +496,12 @@ static int uhid_dev_create2(struct uhid_device *uhid, goto err_free; } - len = min(sizeof(hid->name), sizeof(ev->u.create2.name)) - 1; - strncpy(hid->name, ev->u.create2.name, len); - len = min(sizeof(hid->phys), sizeof(ev->u.create2.phys)) - 1; - strncpy(hid->phys, ev->u.create2.phys, len); - len = min(sizeof(hid->uniq), sizeof(ev->u.create2.uniq)) - 1; - strncpy(hid->uniq, ev->u.create2.uniq, len); + len = min(sizeof(hid->name), sizeof(ev->u.create2.name)); + strlcpy(hid->name, ev->u.create2.name, len); + len = min(sizeof(hid->phys), sizeof(ev->u.create2.phys)); + strlcpy(hid->phys, ev->u.create2.phys, len); + len = min(sizeof(hid->uniq), sizeof(ev->u.create2.uniq)); + strlcpy(hid->uniq, ev->u.create2.uniq, len); hid->ll_driver = &uhid_hid_driver; hid->bus = ev->u.create2.bus;