From 517c7bf99bad3d6b9360558414aae634b7472d80 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu, 16 Sep 2021 16:57:37 +0300
Subject: [PATCH] usb: musb: tusb6010: uninitialized data in
 tusb_fifo_write_unaligned()
Git-commit: 517c7bf99bad3d6b9360558414aae634b7472d80
References: git-fixes
Patch-mainline: v5.15-rc3

This is writing to the first 1 - 3 bytes of "val" and then writing all
four bytes to musb_writel().  The last byte is always going to be
garbage.  Zero out the last bytes instead.

Fixes: 550a7375fe72 ("USB: Add MUSB and TUSB support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210916135737.GI25094@kili
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 drivers/usb/musb/tusb6010.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index c42937692207..c968ecda42aa 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -190,6 +190,7 @@ tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
 	}
 	if (len > 0) {
 		/* Write the rest 1 - 3 bytes to FIFO */
+		val = 0;
 		memcpy(&val, buf, len);
 		musb_writel(fifo, 0, val);
 	}
-- 
2.26.2