From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 77D17304BB4; Mon, 3 Nov 2025 11:27:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762169234; cv=none; b=YLrB3k11LyUx/8X0/B7Hg0S6c4Lya7KP7wivNE7HqxKZ6xHvjHWG0J97EOVzNL29fGwu95uYLRaZzRtDlQ68XHXJDy/4dA2XE0u22VdJT5GdtuxXvD3uvT+prslwiX6gUSekuK6ceocmQxItFg7/IKrn5GsIpjdbGEfgnFApmIs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762169234; c=relaxed/simple; bh=VcUIGwwKN/fhXkDTSmha7C+Rr/wXO/1VNsCTsLfj5Z0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=WsS7UiHAMMyiHP0b1T9CdbCefhDbPFPKuEeWxaDgN5E6TWqTWjERoX0bmgAp31mNKiTa2DkRWW06uBHom2YdmzZ/jpZ2cko3lOyQ98hI4H7d4ie08+n2eDoNRRYJ8OpFsK1CigdQ/18LXJKTw/nI9E7xQn9MnC9yEA5SX4s/b5A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IGnAQ3tR; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IGnAQ3tR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 71722C4CEF8; Mon, 3 Nov 2025 11:27:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762169233; bh=VcUIGwwKN/fhXkDTSmha7C+Rr/wXO/1VNsCTsLfj5Z0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=IGnAQ3tRPPjorQ1+iD6J8WpE2snil5nXhlYYaMzMblC27Q7UW1C8AUCNkhTTnHmXB ojpglavzAw+t7jnhjOOKrx9FgI8J3v6b1yj54L+7I7QGmMWwbJuwjf0EK6tgMoXOP9 Ln6zCdjmMlbCeXOKTzDRpiGH+o+4Oflmm6UMSvDT2G8VsOMkO01JezyGV6I8IrczaX cAhLr8VJSQFB1BDpdoSNdcEOz01LjdagIuipmDSHu6PXHBFcl4xH9qgiSwQlcJq9x+ wBteyF/8mfMS8WG4rFcgzyVYXm7b1kaP5ppeCVQCxt0TOfrzSXjpdsIVXMnZoH+wKy Cijms8FKajLOA== From: Christian Brauner Date: Mon, 03 Nov 2025 12:26:50 +0100 Subject: [PATCH 02/16] aio: use credential guards Precedence: bulk X-Mailing-List: linux-unionfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251103-work-creds-guards-simple-v1-2-a3e156839e7f@kernel.org> References: <20251103-work-creds-guards-simple-v1-0-a3e156839e7f@kernel.org> In-Reply-To: <20251103-work-creds-guards-simple-v1-0-a3e156839e7f@kernel.org> To: Linus Torvalds Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-aio@kvack.org, linux-unionfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, cgroups@vger.kernel.org, netdev@vger.kernel.org, Christian Brauner X-Mailer: b4 0.15-dev-96507 X-Developer-Signature: v=1; a=openpgp-sha256; l=925; i=brauner@kernel.org; h=from:subject:message-id; bh=VcUIGwwKN/fhXkDTSmha7C+Rr/wXO/1VNsCTsLfj5Z0=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWRyTGx34UuK1y8Wn/fcvmTfbgm2oJ3Rc9hyGCcu6knct GCXTrtRRykLgxgXg6yYIotDu0m43HKeis1GmRowc1iZQIYwcHEKwEQ25jL84Qx9qzArhc+RXZhj 5Z3Lq1eYP7C/eGoZWwtvAtfjurrJaYwM7/3/v9Q8HpPxIqeDceLPo1ZfbuxaZBP6Wp8ndtW908r CLAA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Use credential guards for scoped credential override with automatic restoration on scope exit. Signed-off-by: Christian Brauner --- fs/aio.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/aio.c b/fs/aio.c index 5bc133386407..0a23a8c0717f 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -1640,10 +1640,10 @@ static int aio_write(struct kiocb *req, const struct iocb *iocb, static void aio_fsync_work(struct work_struct *work) { struct aio_kiocb *iocb = container_of(work, struct aio_kiocb, fsync.work); - const struct cred *old_cred = override_creds(iocb->fsync.creds); - iocb->ki_res.res = vfs_fsync(iocb->fsync.file, iocb->fsync.datasync); - revert_creds(old_cred); + scoped_with_creds(iocb->fsync.creds) + iocb->ki_res.res = vfs_fsync(iocb->fsync.file, iocb->fsync.datasync); + put_cred(iocb->fsync.creds); iocb_put(iocb); } -- 2.47.3