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HID: uhid: use strlcpy() instead of strncpy()

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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 <xiongfeng.wang@linaro.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Xiongfeng Wang 2018-01-09 20:23:32 +08:00 committed by Jiri Kosina
parent b9ec700929
commit 336fd4f5f2
1 changed files with 6 additions and 6 deletions
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12
drivers/hid/uhid.c
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@ -496,12 +496,12 @@ static int uhid_dev_create2(struct uhid_device *uhid,
goto err_free; goto err_free;
} }
len = min(sizeof(hid->name), sizeof(ev->u.create2.name)) - 1; len = min(sizeof(hid->name), sizeof(ev->u.create2.name));
strncpy(hid->name, ev->u.create2.name, len); strlcpy(hid->name, ev->u.create2.name, len);
len = min(sizeof(hid->phys), sizeof(ev->u.create2.phys)) - 1; len = min(sizeof(hid->phys), sizeof(ev->u.create2.phys));
strncpy(hid->phys, ev->u.create2.phys, len); strlcpy(hid->phys, ev->u.create2.phys, len);
len = min(sizeof(hid->uniq), sizeof(ev->u.create2.uniq)) - 1; len = min(sizeof(hid->uniq), sizeof(ev->u.create2.uniq));
strncpy(hid->uniq, ev->u.create2.uniq, len); strlcpy(hid->uniq, ev->u.create2.uniq, len);
hid->ll_driver = &uhid_hid_driver; hid->ll_driver = &uhid_hid_driver;
hid->bus = ev->u.create2.bus; hid->bus = ev->u.create2.bus;