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-rw-r--r--kernel/user_namespace.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index 4109f8320684..f65a0a06a8c0 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -976,8 +976,8 @@ static int userns_install(struct nsproxy *nsproxy, struct ns_common *ns)
if (user_ns == current_user_ns())
return -EINVAL;
- /* Threaded processes may not enter a different user namespace */
- if (atomic_read(&current->mm->mm_users) > 1)
+ /* Tasks that share a thread group must share a user namespace */
+ if (!thread_group_empty(current))
return -EINVAL;
if (current->fs->users != 1)