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-rw-r--r--extra/mariabackup/xtrabackup.cc4
1 files changed, 2 insertions, 2 deletions
diff --git a/extra/mariabackup/xtrabackup.cc b/extra/mariabackup/xtrabackup.cc
index c4d385fef5e..867e7869fcf 100644
--- a/extra/mariabackup/xtrabackup.cc
+++ b/extra/mariabackup/xtrabackup.cc
@@ -3107,8 +3107,8 @@ static dberr_t xb_assign_undo_space_start()
name[dirnamelen++] = SRV_PATH_SEPARATOR;
}
- ut_snprintf(name + dirnamelen, strlen(name) + strlen("ibdata1"),
- "%s", "ibdata1");
+ ut_snprintf(name + dirnamelen, (sizeof name) - dirnamelen,
+ "%s", "ibdata1");
file = os_file_create(innodb_file_data_key, name, OS_FILE_OPEN,
OS_FILE_NORMAL, OS_DATA_FILE, &ret, 0);