From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794302260; b=Jr/LTomG7xIRLelFOqJ6Ha0AU+pTy75AIaUO8iMBLv99gKx4G9ZRnbBY2B+8iSstc5dI 0dLEm6RdkRvngxIGipJvrqr5pDyEeBxGmmRdmSm1d0lFPz9Mp9WMcOqxsnPB/4IppNN0i GOgRedYPg8a2v9HdV3B8XOaxjlZisuFimADcAAkrxID6MU7NcsMDpvFk9An4/EulixZWA VJWt6hpC56NDSL/faIziLt8TxeUHJ0s07icJFpFQLY0XDdP+Ya2jBgFBuOqW7X5mO/aM5 vRS9kfHzD1i+PekhHgB9+LIsRKjgbnrbtNgYzh01Xvf3vviqvtCH2CQKRVJXdvYkj/Q== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794302260; h=Received:DKIM-Signature:From:Date:Subject:MIME-Version:Content-Type: Content-Transfer-Encoding:Message-Id:References:In-Reply-To:To:Cc: X-Mailer:X-Developer-Signature:X-Developer-Key; bh=h94mIi/imn4D3waXvt8ZAO8zbcvNeSGH9zaPuRN/zFo=; b=znvsD6qTl4GBAd1HNzQSvE2LRryPA9UPb5LXf1isibw6guS506VuSXJGAEk9mFFSUCin 398prGyt8GwuieUa7pe0CPrMBPAaU18AIxsTkZkd/rRXcDigaDz2nJXYnv+vOe9LQkcmA KRZ/+AsKIsMbL1yt3JeCSNz6aQwJetpcaQm3gpwWPGde6H53uAhVT7Uk9lCJM1p5fs243 eTQPWIXapAJgGEnNnrY34whJSNZ7M3/g8ny66K6oRx7xvwVImIh9aNPdcMeEQkgiV9CDy druEQU5dXBL6sD/rcew/oBW7czKmbxUfU2IJMxKevOvey6xIMtwtgzj9Sc5GxSARCdw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=hCKnpX2L; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7275B606A902; Tue, 10 Nov 2026 09:17:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=hCKnpX2L Received: by smtp.kernel.org (Postfix) with ESMTPSA id ACD6F1F0089F; Tue, 10 Nov 2026 09:17:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794302260; bh=h94mIi/imn4D3waXvt8ZAO8zbcvNeSGH9zaPuRN/zFo=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=hCKnpX2LMq/yIBVu+3fedTSWRzmEiUKg05k70/cabSsZyN0V70DQNw0habLh5Rp3N c956FUO8f5KMtGhmwZF6JaNrD5YNWgtZGhi2tRzcc2lZ8L4JIxwL79H0b3tBFB4IaO XmqyiHmmqPdau5vX2eMWUrlPCMnRhkbqwrhqOEqbuhQuSJxQhgZLHlWLkOa387kF87 c2QE631FmWh521q0EDzd1BLKeXN0jM2x4hEbJfjU0RuxAt/DbvL2B4RJaNxjRNgwuN sRHkcU5kSCaIM/R/aSWv3TJjb6hXOJ6l+gef1isFdWoX5RRm93+0TI6pGc9yKYqXGJ EIZJjyG5YAQyg== From: Christian Brauner Date: Tue, 10 Nov 2026 10:14:31 +0100 Subject: [PATCH RFC 15/41] tracefs: use fc_init_pseudo() X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261110-work-loop-pseudo-v1-15-4c998976c6c7@kernel.org> References: <20261110-work-loop-pseudo-v1-0-4c998976c6c7@kernel.org> In-Reply-To: <20261110-work-loop-pseudo-v1-0-4c998976c6c7@kernel.org> To: linux-fsdevel@vger.kernel.org Cc: Jann Horn , Chris Mason , Josef Bacik , Christoph Hellwig , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, Alexander Viro , Jan Kara , linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, driver-core@lists.linux.dev, linux-mm@kvack.org, bpf@vger.kernel.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, apparmor@lists.ubuntu.com, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, fuse-devel@lists.linux.dev, linux-efi@vger.kernel.org, xen-devel@lists.xenproject.org, ocfs2-devel@lists.linux.dev, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-usb@vger.kernel.org, Amir Goldstein , linux-erofs@lists.ozlabs.org, linux-kselftest@vger.kernel.org, "Christian Brauner (Amutable)" X-Mailer: b4 0.17-dev-ce4c1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1051; i=brauner@kernel.org; h=from:subject:message-id; bh=nNHku2orMRQhrPcnxhaESkf9+5yEVey8qH80JYuUurA=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWR9erD0RXLTJKNzrh5L9mkY/O9J+HRKY33C443/9A4Lr 21xrLd+1VHKwiDGxSArpsji0G4SLrecp2KzUaYGzBxWJpAhDFycAjAR+R0M/72Fl4jGuvHt3/5x u7NfzPNpdcsMM67cPHfs9ommtv7O3i+MDBdi/75YKJwQsP/1zN8L3y7I88yZX64y724L9xZhYx+ hQ6wA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Initialize tracefs as a pseudo filesystem. This raises SB_I_PSEUDO and also SB_I_NOEXEC and SB_I_NODEV. tracefs never holds executables or device nodes. SB_I_NOEXEC also refuses PROT_EXEC mappings. The only tracefs files that can be mapped are the ring buffers and __rb_map_vma() refuses VM_EXEC already. Signed-off-by: Christian Brauner (Amutable) --- fs/tracefs/inode.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c index 5020365ca704..e04febd868eb 100644 --- a/fs/tracefs/inode.c +++ b/fs/tracefs/inode.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -510,6 +511,7 @@ static int tracefs_init_fs_context(struct fs_context *fc) fsi->mode = TRACEFS_DEFAULT_MODE; fc->s_fs_info = fsi; + fc_init_pseudo(fc); fc->ops = &tracefs_context_ops; return 0; } -- 2.53.0