Commit 5c004828 authored Jul 05, 2016 by Eric W. Biederman

dquot: For now explicitly don't support filesystems outside of init_user_ns



Mostly supporting filesystems outside of init_user_ns is
s/&init_usre_ns/dquot->dq_sb->s_user_ns/.  An actual need for
supporting quotas on filesystems outside of s_user_ns is quite a ways
away and to be done responsibily needs an audit on what can happen
with hostile quota files.  Until that audit is complete don't attempt
to support quota files on filesystems outside of s_user_ns.

Cc: Jan Kara <jack@suse.cz>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

parent cfd4c70a

fs/quota/dquot.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -2271,6 +2271,11 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id,
		error = -EINVAL;
		goto out_fmt;
		}
		/* Filesystems outside of init_user_ns not yet supported */
		if (sb->s_user_ns != &init_user_ns) {
		error = -EINVAL;
		goto out_fmt;
		}
		/* Usage always has to be set... */
		if (!(flags & DQUOT_USAGE_ENABLED)) {
		error = -EINVAL;

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