From patchwork Wed Aug 21 09:56:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= X-Patchwork-Id: 13771158 Received: from smtp-8fab.mail.infomaniak.ch (smtp-8fab.mail.infomaniak.ch [83.166.143.171]) (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 0CC111C3304 for ; Wed, 21 Aug 2024 09:56:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=83.166.143.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724234213; cv=none; b=nx2aA5hi4vcv7rDAzjrqyd/bXhNAkZAwbMCODCWZYQqgZXPQ6f5C1D+9iSriaLCcfp+asIdZBLAtxVQ4ZsoGVw982FBBBOBCTCVaZe9+9mQ/kHCACY6j5qa0gwvQAwOQV2bvyh6H0csxioThq2cAOVQtQ0PwxggkZritpbOZIDE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724234213; c=relaxed/simple; bh=QWrZEraJ1HdvGTLjL05egrMJ/0TxPWXDxYriLvhDu0w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=IBCy2vcfO56zKjWNjeDBnMNxRYKz8HWOHGcX1eKmgIqr97db9uETYc7O6pkNGA1p/0j8nwr4BsD4RlFPp7mqCAHNsTB4XG/NYnluSEEEt/BbVBo7oAPvBdYM1XvT2lo3BbtOsOSXQ5XLZY1LPgZAzlZ7+23d6zMZh91RFiHliuk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=digikod.net; spf=pass smtp.mailfrom=digikod.net; dkim=pass (1024-bit key) header.d=digikod.net header.i=@digikod.net header.b=Ox60FBZB; arc=none smtp.client-ip=83.166.143.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=digikod.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=digikod.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=digikod.net header.i=@digikod.net header.b="Ox60FBZB" Received: from smtp-4-0000.mail.infomaniak.ch (smtp-4-0000.mail.infomaniak.ch [10.7.10.107]) by smtp-4-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4WphYn0kLFzWr; Wed, 21 Aug 2024 11:56:29 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=digikod.net; s=20191114; t=1724234188; bh=nSXgzhxaLWXtS2g1+LQLG+mkFQcvxD/SuRCRuRZ9I3w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ox60FBZBAhLUmU0Qbe8PAyseSF2sVRUoG3ei5pRkq/l8y3kMj2h31WAJ6Lq79E/UR VEpapKtSqCn8b4g2xBCTmnQ96qIipyR5rXApErtx0BCUoEWmZiYrKrPuIG3vM5KO1z mjLnD3zJclWQb6ofxDhrPKpyrGKxV314B6+5mt88= Received: from unknown by smtp-4-0000.mail.infomaniak.ch (Postfix) with ESMTPA id 4WphYm1kMYzK84; Wed, 21 Aug 2024 11:56:28 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Paul Moore Cc: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, Jan Kara , Tahera Fahimi , Mateusz Guzik , Al Viro , Casey Schaufler , James Morris , Jann Horn , Ondrej Mosnacek , "Serge E. Hallyn" , Stephen Smalley Subject: [PATCH v3 2/2] security: Update file_set_fowner documentation Date: Wed, 21 Aug 2024 11:56:06 +0200 Message-ID: <20240821095609.365176-2-mic@digikod.net> In-Reply-To: <20240821095609.365176-1-mic@digikod.net> References: <20240821095609.365176-1-mic@digikod.net> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha Highlight that the file_set_fowner hook is now called with a lock held. Cc: Al Viro Cc: Casey Schaufler Cc: Christian Brauner Cc: James Morris Cc: Jann Horn Cc: Ondrej Mosnacek Cc: Paul Moore Cc: Serge E. Hallyn Cc: Stephen Smalley Signed-off-by: Mickaël Salaün --- Changes since v2: - Split the doc update into a separate patch to ease backporting. --- security/security.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/security/security.c b/security/security.c index 8cee5b6c6e6d..dc2cd7354015 100644 --- a/security/security.c +++ b/security/security.c @@ -2931,6 +2931,8 @@ int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) * Save owner security information (typically from current->security) in * file->f_security for later use by the send_sigiotask hook. * + * This hook is called with file->f_owner.lock held. + * * Return: Returns 0 on success. */ void security_file_set_fowner(struct file *file)