Re: [syzbot] [hwmon?] KASAN: slab-out-of-bounds Read in aqc_raw_event

[Edward Adam Davis]

#syz test

diff --git a/drivers/hwmon/aquacomputer_d5next.c b/drivers/hwmon/aquacomputer_d5next.c
index 1ca70e726298..1cc6c220ffe9 100644
--- a/drivers/hwmon/aquacomputer_d5next.c
+++ b/drivers/hwmon/aquacomputer_d5next.c
@@ -1334,6 +1334,9 @@ static int aqc_raw_event(struct hid_device *hdev, struct hid_report *report, u8
 
 	priv = hid_get_drvdata(hdev);
 
+	if (size < priv->buffer_size)
+		return 0;
+
 	/* Info provided with every report */
 	priv->serial_number[0] = get_unaligned_be16(data + priv->serial_number_start_offset);
 	priv->serial_number[1] = get_unaligned_be16(data + priv->serial_number_start_offset +