From: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Date: Wed, 19 Jun 2024 19:42:44 +0000 (+0200)
Subject: USB: serial: garmin_gps: annotate struct garmin_packet with __counted_by
X-Git-Tag: v6.11-rc3~4^2~15^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=55a15b3a713a3f24360cf9d8dcfd2a3e337321d6;p=thirdparty%2Fkernel%2Flinux.git

USB: serial: garmin_gps: annotate struct garmin_packet with __counted_by

Use the __counted_by compiler attribute for the data[] flexible array
member to improve the results of array bound sanitizers.

Reviewed-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>
---

diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index 670e942fdaaa1..57df6ad183ff0 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -104,7 +104,7 @@ struct garmin_packet {
 	int               seq;
 	/* the real size of the data array, always > 0 */
 	int               size;
-	__u8              data[];
+	__u8              data[] __counted_by(size);
 };
 
 /* structure used to keep the current state of the driver */