thunderbolt: Fix off by one in tb_port_find_retimer()

commit 08fe7ae1857080f5075df5ac7fef2ecd4e289117 upstream.

This array uses 1-based indexing so it corrupts memory one element
beyond of the array.  Fix it by making the array one element larger.

Fixes: dacb12877d92 ("thunderbolt: Add support for on-board retimers")
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/thunderbolt/retimer.c b/drivers/thunderbolt/retimer.c
index 7a5d616..c44fad2 100644 (file)
--- a/drivers/thunderbolt/retimer.c
+++ b/drivers/thunderbolt/retimer.c
@@ -406,7 +406,7 @@ static struct tb_retimer *tb_port_find_retimer(struct tb_port *port, u8 index)
  */
 int tb_retimer_scan(struct tb_port *port)
 {
-       u32 status[TB_MAX_RETIMER_INDEX] = {};
+       u32 status[TB_MAX_RETIMER_INDEX + 1] = {};
        int ret, i, last_idx = 0;
 
        if (!port->cap_usb4)