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 085FA4431 for ; Wed, 15 Mar 2023 12:35:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 791BDC433D2; Wed, 15 Mar 2023 12:35:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678883713; bh=PP2vOhwYJFy/p40fVDOl/oAx4CphyQWstD6rS+UDdB4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DK5yRW9kz4zqSHNhtMJzsXwTPR/8cFjGpTFdQA3Z3rxuUyIS3LLRCd0p7BiayDmtc DxQKGNDuANaOBq1F0OZRrhfh38ysgAPwcFZ/lMQlqNfcue9P0k/I6qcyEylxeuAsvO dvMr5Caq3jLKe58M2D853m4G0GmNdr0fMCV7TNto= 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 6.1 103/143] NFSD: Protect against filesystem freezing Date: Wed, 15 Mar 2023 13:13:09 +0100 Message-Id: <20230315115743.635882067@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230315115740.429574234@linuxfoundation.org> References: <20230315115740.429574234@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 0d49c6bb22eb1..59f9a8cee012a 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1037,7 +1037,9 @@ 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