diff options
Diffstat (limited to 'fs/attr.c')
| -rw-r--r-- | fs/attr.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/attr.c b/fs/attr.c index dd723578ddce..42bb42bb3c72 100644 --- a/fs/attr.c +++ b/fs/attr.c @@ -266,6 +266,14 @@ int notify_change(struct dentry * dentry, struct iattr * attr, struct inode **de !kgid_has_mapping(inode->i_sb->s_user_ns, attr->ia_gid)) return -EOVERFLOW; + /* Don't allow modifications of files with invalid uids or + * gids unless those uids & gids are being made valid. + */ + if (!(ia_valid & ATTR_UID) && !uid_valid(inode->i_uid)) + return -EOVERFLOW; + if (!(ia_valid & ATTR_GID) && !gid_valid(inode->i_gid)) + return -EOVERFLOW; + error = security_inode_setattr(dentry, attr); if (error) return error; |