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 5ED15311C19; Tue, 16 Dec 2025 03:54:48 +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=1765857292; cv=none; b=BiVFWRARlPrG1gukInQ25dBGUSVQxj8DjxZR3lEH9BoZmk2XYBnP7SaHBJ9n7bUfrmgZZXS0YXTf0gAQJVjOU7UWHc+67FyYRvarDee86Ef4hOCKmIw5oSjzVlwDYh19MfjcIcgIj4K6AVNI1E9LpukAjWzsVWd+UuLX2P+CVKQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765857292; c=relaxed/simple; bh=4oxuQFLk8YkIq/5mYSLl2XCxIvuC91NG8EaCN9dotBs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dfoJN6vTQIeMlCS+EobK2y4VwkZ65o+tkOOpBeeA8/TQN4FwQ76szCzVnL7hcKq9elgmQOkR8gfowzAqdeGLWTNCjR0jK6f6etYJS+O/CUZn92LbPcHTiZCE5PgA4MpzzBP6YSuBwsbNSAbbveN2HHKegRoiCUhXL2TfhkDaxyE= 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=Lbnc+pq+; 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="Lbnc+pq+" 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=12NAM8k9D9tYz7pZJw55n8bdiFp2kiCbLsvUoQCJquE=; b=Lbnc+pq+S9fGV0nw14zpAbhCTK nJfi9fUZDCgDpQOnqlB/PQ8yEW5pllRCfhEYjuASm0yQi97LiAa6V29Wl7uMtXqdzbIxHLiZsJEN4 iBoN+6nZOlKKCB4lGbn28g/lhzJYrF2sfxdOPW9yBXxqzqeJ8h+mEmc+VjR4sN1gZgeSavPOTUfZz hjcmoGZvj1Vzw8BRqoSyRcY2crz2H4Y/V8iPcTMQGrY6QtP2gwNakTFcyy7Vrc+FvwPb2Y+pWz+ZF 1sIDKJuBSRmTAquHsMFpkKD/goSqOMInM0y7fpslDvKmLsURvUGiAAsrm81e4VQt56nRfNf8xPD+E obkz9fsw==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.99 #2 (Red Hat Linux)) id 1vVM9f-0000000GwIt-0cyA; Tue, 16 Dec 2025 03:55:19 +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 05/59] chdir(2): import pathname only once Date: Tue, 16 Dec 2025 03:54:24 +0000 Message-ID: <20251216035518.4037331-6-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 Convert the user_path_at() call inside a retry loop into getname_flags() + filename_lookup() + putname() and leave only filename_lookup() inside the loop. In this case we never pass LOOKUP_EMPTY, so getname_flags() is equivalent to plain getname(). The things could be further simplified by use of cleanup.h stuff, but let's not clutter the patch with that. Signed-off-by: Al Viro --- fs/open.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/open.c b/fs/open.c index a2d775bec8c1..67c114bdeac5 100644 --- a/fs/open.c +++ b/fs/open.c @@ -555,8 +555,9 @@ SYSCALL_DEFINE1(chdir, const char __user *, filename) struct path path; int error; unsigned int lookup_flags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY; + struct filename *name = getname(filename); retry: - error = user_path_at(AT_FDCWD, filename, lookup_flags, &path); + error = filename_lookup(AT_FDCWD, name, lookup_flags, &path, NULL); if (error) goto out; @@ -573,6 +574,7 @@ SYSCALL_DEFINE1(chdir, const char __user *, filename) goto retry; } out: + putname(name); return error; } -- 2.47.3