From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 7DFB7C76196 for ; Wed, 15 Mar 2023 12:45:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232905AbjCOMpJ (ORCPT ); Wed, 15 Mar 2023 08:45:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233116AbjCOMof (ORCPT ); Wed, 15 Mar 2023 08:44:35 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D7AFB769C7 for ; Wed, 15 Mar 2023 05:43:14 -0700 (PDT) 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 A1FC7B81E12 for ; Wed, 15 Mar 2023 12:42:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 14BB3C433A0; Wed, 15 Mar 2023 12:42:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678884152; bh=DPZpLSLmivjXqHgqKrWf6GAVvKyC6A0BvTqqTbumI7I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=y08ks6SVyj6PRoPJYI7ppj1qeiMzG3i02AvZHhUnLP1jKKAz6bqsRybM5+Ey2vwFP e254CGfKNkTe3htrAt0RvG3/ysghF2ujYM2X5Vgv9jlyfEjcA4GmGSo6CBcdgo7FsZ 2mLYmpqz4z2cOVaxPcknJEvnvcMphFHqlKayhiHI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, flole@flole.de, Jan Kara , Jeff Layton , Chuck Lever , Sasha Levin Subject: [PATCH 6.2 099/141] NFSD: Protect against filesystem freezing Date: Wed, 15 Mar 2023 13:13:22 +0100 Message-Id: <20230315115743.016974086@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230315115739.932786806@linuxfoundation.org> References: <20230315115739.932786806@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Chuck Lever [ Upstream commit fd9a2e1d513823e840960cb3bc26d8b7749d4ac2 ] Flole observes this WARNING on occasion: [1210423.486503] WARNING: CPU: 8 PID: 1524732 at fs/ext4/ext4_jbd2.c:75 ext4_journal_check_start+0x68/0xb0 Reported-by: Suggested-by: Jan Kara Link: https://bugzilla.kernel.org/show_bug.cgi?id=217123 Fixes: 73da852e3831 ("nfsd: use vfs_iter_read/write") Reviewed-by: Jeff Layton Reviewed-by: Jan Kara Signed-off-by: Chuck Lever Signed-off-by: Sasha Levin --- fs/nfsd/vfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 4c3a0d84043c9..bb1e85586dfdd 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1100,7 +1100,9 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf, since = READ_ONCE(file->f_wb_err); if (verf) nfsd_copy_write_verifier(verf, nn); + file_start_write(file); host_err = vfs_iter_write(file, &iter, &pos, flags); + file_end_write(file); if (host_err < 0) { nfsd_reset_write_verifier(nn); trace_nfsd_writeverf_reset(nn, rqstp, host_err); -- 2.39.2