diff options
| -rw-r--r-- | kernel/user_namespace.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c index 563a2981d7c7..4f7e357ac1e2 100644 --- a/kernel/user_namespace.c +++ b/kernel/user_namespace.c @@ -683,11 +683,13 @@ static void *m_start(struct seq_file *seq, loff_t *ppos, struct uid_gid_map *map) { loff_t pos = *ppos; + unsigned extents = map->nr_extents; + smp_rmb(); - if (pos >= map->nr_extents) + if (pos >= extents) return NULL; - if (map->nr_extents <= UID_GID_MAP_MAX_BASE_EXTENTS) + if (extents <= UID_GID_MAP_MAX_BASE_EXTENTS) return &map->extent[pos]; return &map->forward[pos]; |