s390/monwriter: fix smatch warning for strcpy()

This patch fixes the following smatch warning:
monwrite_diag() error: strcpy() '"LNXAPPL"' too large for 'id.prod_nr'
(8 vs 7)
Using strcpy() is wrong, because it also copies the terminating null
byte, but in this case the extra copied null byte will be overwritten
right after the strcpy(), so there is no real problem here.
Use strncpy() to fix the warning.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c
index 4600aa10a1c6c5824f36168fb83b414d2e4e915b..668b32b0dc1dc39317ebbc682f55bedbc86537c3 100644 (file)
--- a/drivers/s390/char/monwriter.c
+++ b/drivers/s390/char/monwriter.c
@@ -60,7 +60,7 @@ static int monwrite_diag(struct monwrite_hdr *myhdr, char *buffer, int fcn)
        struct appldata_product_id id;
        int rc;
 
-       strcpy(id.prod_nr, "LNXAPPL");
+       strncpy(id.prod_nr, "LNXAPPL", 7);
        id.prod_fn = myhdr->applid;
        id.record_nr = myhdr->record_num;
        id.version_nr = myhdr->version;