Message ID | 20211206145551.036898616@linuxfoundation.org |
---|---|
State | Superseded |
Headers | show
Return-Path: <stable-owner@kernel.org> X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AAE5BC4332F for <stable@archiver.kernel.org>; Mon, 6 Dec 2021 15:08:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347463AbhLFPLw (ORCPT <rfc822;stable@archiver.kernel.org>); Mon, 6 Dec 2021 10:11:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53162 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347628AbhLFPJN (ORCPT <rfc822;stable@vger.kernel.org>); Mon, 6 Dec 2021 10:09:13 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17D1DC08E897; Mon, 6 Dec 2021 07:04:01 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B5A79B81125; Mon, 6 Dec 2021 15:04:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F38B1C341C2; Mon, 6 Dec 2021 15:03:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1638803039; bh=c8PhzcmGKHbDf7AX/D/Q+/ZXvM2sns1Nys7dToprWgY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=h2tfOkgyd8oNxX1GIIoRIFLcj9qIoTni5McyQO4MFnw/M0Uq+MI6e6+x1NWKlUNnS Z0Y565IQqNijUorXXaJgf2QW3HafkhheC7oNdeHrq0jZ+Kvd6vc2mDikdsFgYSCHX7 NuszkYMOqoFVkibjAXHzufhG3JqAtX34BDHRFnBw= From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, stable@vger.kernel.org, Miklos Szeredi <mszeredi@redhat.com>, Linus Torvalds <torvalds@linux-foundation.org>, Jann Horn <jannh@google.com> Subject: [PATCH 4.9 53/62] fget: check that the fd still exists after getting a ref to it Date: Mon, 6 Dec 2021 15:56:36 +0100 Message-Id: <20211206145551.036898616@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211206145549.155163074@linuxfoundation.org> References: <20211206145549.155163074@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: <stable.vger.kernel.org> X-Mailing-List: stable@vger.kernel.org |
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--- a/fs/file.c +++ b/fs/file.c @@ -709,6 +709,10 @@ loop: file = NULL; else if (!get_file_rcu_many(file, refs)) goto loop; + else if (__fcheck_files(files, fd) != file) { + fput_many(file, refs); + goto loop; + } } rcu_read_unlock();