Bluetooth: increase BTNAMSIZ to 21 chars to fix potential buffer overflow

An earlier commit replaced using batostr to using %pMR sprintf for the
construction of session->name. Static analysis detected that this new
method can use a total of 21 characters (including the trailing '\0')
so we need to increase the BTNAMSIZ from 18 to 21 to fix potential
buffer overflows.

Addresses-Coverity: ("Out-of-bounds write")
Fixes: fcb73338ed53 ("Bluetooth: Use %pMR in sprintf/seq_printf instead of batostr")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/cmtp/cmtp.h b/net/bluetooth/cmtp/cmtp.h
index c32638dddbf9409d685c3436eb1b1541d04d5a9e..f6b9dc4e408f23754c5f71df3de63299488d5a80 100644 (file)
--- a/net/bluetooth/cmtp/cmtp.h
+++ b/net/bluetooth/cmtp/cmtp.h
@@ -26,7 +26,7 @@
 #include <linux/types.h>
 #include <net/bluetooth/bluetooth.h>
 
-#define BTNAMSIZ 18
+#define BTNAMSIZ 21
 
 /* CMTP ioctl defines */
 #define CMTPCONNADD    _IOW('C', 200, int)