UBI: generate random image_seq when formatting MTD devices

Generate random image_seq when attaching empty MTD device (kernel do the
ubi formating).

Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c
index 6b7c0c4baf07..de7b2f1c4113 100644
--- a/drivers/mtd/ubi/scan.c
+++ b/drivers/mtd/ubi/scan.c
@@ -44,6 +44,7 @@
 #include <linux/slab.h>
 #include <linux/crc32.h>
 #include <linux/math64.h>
+#include <linux/random.h>
 #include "ubi.h"
 
 #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
@@ -956,6 +957,7 @@ static int check_what_we_have(const struct ubi_device *ubi,
                          */
                         si->is_empty = 1;
                         ubi_msg("empty MTD device detected");
+                        get_random_bytes(&ubi->image_seq, sizeof(ubi->image_seq));
                 } else {
                         ubi_err("MTD device possibly contains non-UBI data, "
                                 "refusing it");