From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [62.89.141.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2E6D63128A3; Tue, 16 Dec 2025 03:54:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.89.141.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765857296; cv=none; b=U4CKtTYsDGOfBxQR2Mmy9ZlJf+HZrFk3Iqa6ll+5TvbWjPe5J1tI23xg1tzDzdnghelBYpPQh8QcwdCPhpSIKXlFRcNEbr6uXCLs/8iESQGR2LMsg+EF8Sc8EhHe7ZIK6mio+5svTSPBPHAE8gfZ1LkGsC6AFK7/kOj0w3JWziM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765857296; c=relaxed/simple; bh=ltTrYl7GN0DzsMvuK83DN/Ol0bNTuyKzVNTK64WoEE0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MHr4gMMPO//N6dPr5sEy06dGhu71vCTsKGuC4HNxoLN3oEcD7vFvoMsQD1NWranjV5c5uft3g747i0DSi50yVIfVTLG1rDq2I/4uWgGePWmmMLmy5pK9I8zU565GyW4M0P9eL5xTwgNrVNFONb757lntPtAPeNQ3dS+GtJL7gJk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk; spf=none smtp.mailfrom=ftp.linux.org.uk; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b=n6qxSoWI; arc=none smtp.client-ip=62.89.141.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ftp.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b="n6qxSoWI" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=qwJAhJsvJ2SJYlVcArGg+7WWNzPWS5syBQcg8iMXPSQ=; b=n6qxSoWItZefHBpqcxEMN1PCyO nSgD7OtiSg/FcQm9gKwYSA3n6Mxg8ywl+958p5JlQKppgkJg6igdhfYYJTc/caiKLAe/Fetz4UqoC vMbSicyLUdkBSZHErmh4S3La7mYEqvySWjCyDHOmcpKL9YdtbIxClxDNf2/HN4ulxX134zNjFnN9V bgZkKRHOU/rHnu2zJpxFKgyN+lxSSsc0gF4CkLdeJl7FngFhXKESfbaNers+ojr4k/gUamuXcFW8f OtzZeDp+01+9VXOBCPH+Edb7ACW+aB2COIvAZ9bZOqnq+G8m0DwLKC2apoS6X0o0PgU4CHy7/touu s1lf6Xng==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.99 #2 (Red Hat Linux)) id 1vVM9h-0000000GwL9-3Zqa; Tue, 16 Dec 2025 03:55:21 +0000 From: Al Viro To: linux-fsdevel@vger.kernel.org Cc: torvalds@linux-foundation.org, brauner@kernel.org, jack@suse.cz, mjguzik@gmail.com, paul@paul-moore.com, axboe@kernel.dk, audit@vger.kernel.org, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH v3 33/59] mount_setattr(2): don't mess with LOOKUP_EMPTY Date: Tue, 16 Dec 2025 03:54:52 +0000 Message-ID: <20251216035518.4037331-34-viro@zeniv.linux.org.uk> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251216035518.4037331-1-viro@zeniv.linux.org.uk> References: <20251216035518.4037331-1-viro@zeniv.linux.org.uk> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: Al Viro just use CLASS(filename_uflags) + filename_lookup() Signed-off-by: Al Viro --- fs/namespace.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/namespace.c b/fs/namespace.c index 9d0d8ed16264..d632180f9b1a 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -4978,8 +4978,6 @@ SYSCALL_DEFINE5(mount_setattr, int, dfd, const char __user *, path, lookup_flags &= ~LOOKUP_AUTOMOUNT; if (flags & AT_SYMLINK_NOFOLLOW) lookup_flags &= ~LOOKUP_FOLLOW; - if (flags & AT_EMPTY_PATH) - lookup_flags |= LOOKUP_EMPTY; kattr = (struct mount_kattr) { .lookup_flags = lookup_flags, @@ -4992,7 +4990,8 @@ SYSCALL_DEFINE5(mount_setattr, int, dfd, const char __user *, path, if (err <= 0) return err; - err = user_path_at(dfd, path, kattr.lookup_flags, &target); + CLASS(filename_uflags, name)(path, flags); + err = filename_lookup(dfd, name, kattr.lookup_flags, &target, NULL); if (!err) { err = do_mount_setattr(&target, &kattr); path_put(&target); -- 2.47.3