From df8c0b8a03e871431587a13a6765cb4c601e1573 Mon Sep 17 00:00:00 2001
From: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Date: Wed, 19 Jun 2024 21:42:45 +0200
Subject: [PATCH] USB: serial: garmin_gps: use struct_size() to allocate pkt

Use the struct_size macro to calculate the size of the pkt, which
includes a trailing flexible array.

Suggested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <kees@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/serial/garmin_gps.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index 57df6ad183ff..6d6ec7eed87c 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -267,8 +267,7 @@ static int pkt_add(struct garmin_data *garmin_data_p,
 
 	/* process only packets containing data ... */
 	if (data_length) {
-		pkt = kmalloc(sizeof(struct garmin_packet)+data_length,
-								GFP_ATOMIC);
+		pkt = kmalloc(struct_size(pkt, data, data_length), GFP_ATOMIC);
 		if (!pkt)
 			return 0;
 
-- 
2.25.1