diff options
Diffstat (limited to 'fs/super.c')
| -rw-r--r-- | fs/super.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/super.c b/fs/super.c index 874c7e3ebb8f..78790ada7191 100644 --- a/fs/super.c +++ b/fs/super.c @@ -466,6 +466,10 @@ struct super_block *sget_userns(struct file_system_type *type, struct super_block *old; int err; + if (!(flags & MS_KERNMOUNT) && + !(type->fs_flags & FS_USERNS_MOUNT) && + !capable(CAP_SYS_ADMIN)) + return ERR_PTR(-EPERM); retry: spin_lock(&sb_lock); if (test) { |