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 0558A2E427F; Thu, 13 Nov 2025 16:37:31 +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=1763051852; cv=none; b=JNjEu4w+AaQfH0qwKjOQ6tXnGU62+DBvtAVD6gp+8p5ELJRQgC2rmFz7gpdk4qUQQTxG92Fv4BLPoHyjF1myfc+X0WJ45Q1PKtCnzbZOHu4iU6q/IhHmVHi8Wz0WIEn/K/lESM/GKR6BAtyavSzQ92DtewS/XLoIPsDFQtjN860= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763051852; c=relaxed/simple; bh=zSASKcddf9CQaFnn2hf/tv6j/LhojRKTPaPL/pRNonA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=XQDZw0SLVPhzpB1O6duNISx5idmg2q5XUX3FAQFKPcnf7bIGAZ0hO4gbRySDYXSjGTrZ7lVkh7ficaAT/Rur3O+irgROMW1BW9PR/8sgYlzEhQ4tva+asLYVqoXM/AQMLsc8syncXV3PYJ7Or6DepP1VxeJ8m5cK0Lw5Pk9TBqo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rYjTyzQ5; 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="rYjTyzQ5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 33115C116D0; Thu, 13 Nov 2025 16:37:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763051851; bh=zSASKcddf9CQaFnn2hf/tv6j/LhojRKTPaPL/pRNonA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=rYjTyzQ5PHwzSNcSs4sfb79K8QzmrJmgOn03QjWsR50gzVPbwfxeIuqGEkK/DmW8v KRDcultkPSVOTEL6Wx6Fpy0DfFrDw62FONH1Rjd0bln4KCvhkJDHh1y2a6FkAnXeOr 3GdwDqKKImhmH8syW0qOzsz3WOm7/nJabX2reTs/v+eNYA2Sk+CTqB2SGZ+L5Fkr4y TOFIQHOOYKep3xVqEqhOVxTGNUSgnhOEelhd/rO4ruhJ44nkNKyTg7N73Uz06a3bit zGgNV3ylkK59vxk6mY5zBEPcopyN/RMvMfsNDWNAyECrQ7IcLs6wcg7QlkJ2qoXOke wFEeHk36dFwcA== From: Christian Brauner Date: Thu, 13 Nov 2025 17:37:06 +0100 Subject: [PATCH v2 01/42] ovl: add override_creds cleanup guard extension for overlayfs 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: <20251113-work-ovl-cred-guard-v2-1-c08940095e90@kernel.org> References: <20251113-work-ovl-cred-guard-v2-0-c08940095e90@kernel.org> In-Reply-To: <20251113-work-ovl-cred-guard-v2-0-c08940095e90@kernel.org> To: Miklos Szeredi , Amir Goldstein Cc: Linus Torvalds , linux-unionfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, Christian Brauner X-Mailer: b4 0.15-dev-a6db3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1055; i=brauner@kernel.org; h=from:subject:message-id; bh=zSASKcddf9CQaFnn2hf/tv6j/LhojRKTPaPL/pRNonA=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWSKcbq2pq9kdDEx6c1b2Wh0+877oqjiWaq5mXJHOe7Oq LDderyio5SFQYyLQVZMkcWh3SRcbjlPxWajTA2YOaxMIEMYuDgFYCLn9zL8r4q/8Gt9a8qfzzVP T2VE5ez1u6az1jpHa8+cCT9tX3gwsTL8lalJCMyNruUQ/TbvxjWuE6GeLNa5z58sfqR8dsHfn19 0uQA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Overlayfs plucks the relevant creds from the superblock. Extend the override_creds cleanup class I added to override_creds_ovl which uses the ovl_override_creds() function as initialization helper. Add with_ovl_creds() based on this new class. Signed-off-by: Christian Brauner --- fs/overlayfs/overlayfs.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index c8fd5951fc5e..eeace590ba57 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -439,6 +439,11 @@ struct dentry *ovl_workdir(struct dentry *dentry); const struct cred *ovl_override_creds(struct super_block *sb); void ovl_revert_creds(const struct cred *old_cred); +EXTEND_CLASS(override_creds, _ovl, ovl_override_creds(sb), struct super_block *sb) + +#define with_ovl_creds(sb) \ + scoped_class(override_creds_ovl, __UNIQUE_ID(label), sb) + static inline const struct cred *ovl_creds(struct super_block *sb) { return OVL_FS(sb)->creator_cred; -- 2.47.3