1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index 3b52bb72bd1f..65ebaebf502b 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -369,6 +369,7 @@ static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti,
         unsigned int region_count;
         size_t bitset_size, buf_size;
         int r;
+        char dummy;
 
         if (argc < 1 || argc > 2) {
                 DMWARN("wrong number of arguments to dirty region log");
@@ -387,7 +388,7 @@ static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti,
                 }
         }
 
-        if (sscanf(argv[0], "%u", &region_size) != 1 ||
+        if (sscanf(argv[0], "%u%c", &region_size, &dummy) != 1 ||
             !_check_region_size(ti, region_size)) {
                 DMWARN("invalid region size %s", argv[0]);
                 return -EINVAL;