Received: by 2002:a05:6358:7058:b0:131:369:b2a3 with SMTP id 24csp7497779rwp; Tue, 18 Jul 2023 16:50:21 -0700 (PDT) X-Google-Smtp-Source: APBJJlHtm9y6Uzak+BtBU6dxLA2+/2mOxhnjx5PWtlXRN826w2DRUUrMPAUcqprlnEdzkkvPI4Ch X-Received: by 2002:a9d:7b4e:0:b0:6b9:a926:4a12 with SMTP id f14-20020a9d7b4e000000b006b9a9264a12mr4315075oto.28.1689724221241; Tue, 18 Jul 2023 16:50:21 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1689724221; cv=none; d=google.com; s=arc-20160816; b=ItqgvJ2YN8CXICG/NqP/ePORcwfufLeXuce3HidwT/aOur1mrSjGyZzWvcG0HfRrcJ W1zzIyFNZiuv8PN6h9IbnIsYmz2vfYxcTqpdTSizME2Kf3g/iEj/J+BL8NQ98XsDkksW BEY2y6h+MjQraHnxypwm426SH/5iNTCfsMLRILXTeErEld/Q6iA65tA+oMvaB1tSALDi WBS435bJfVkNN0BQTO9eXYv8j+500JhvZIqsJXu05WmobRApn5afE1lYQoDYWAkwIVoz TUHPPAO3N+m0FqNHfoOEGT1IdK3AothrZjj8LPbUVal+qVOzd1VBRohYIpK26XZV9B/V gvJw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date :dkim-signature; bh=4kMk9azBwY0FVc0CxZOnxghz/Hz+vnWCUOSRrSVTPjI=; fh=Bg6I4bqylSpQX4B/HUfI7TnLgVplsAs8pfdD/GAt44o=; b=ymIe5DTJrLD0nOp8YIJ83wZxjVQsk2Z1vUPvP/o0J5AHawjtEJn7IscIsgr5dWIxab AmluRvM5/jETEaq/X72Y/DOedscnSDdEWf31riGAmiI3tPqZjBVgco4Di6zM5gxk9iGU qqyQI+MUpyy9fxOUvf/pNmgwpeJt2xbwvAn/ni54Zd15gmu75jni7c5ddPzPFVPKnjxW mPJ1i+ojFWsknFMfE52zTmQaLOtYmPoHJ1yhFN9TR6gniq07BgNIg3ClBzhO6bFGgS3G 7lWoEOkl87CiNwSg/DXUyPP/lDk76xWHamY5ylUxQPQbBf8ve2VHUOmNo0+98tccbSPL dLng== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=dunnjuSw; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id i62-20020a638741000000b005481915c0c7si2251484pge.32.2023.07.18.16.50.08; Tue, 18 Jul 2023 16:50:21 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=dunnjuSw; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231293AbjGRXHr (ORCPT + 99 others); Tue, 18 Jul 2023 19:07:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37992 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231219AbjGRXHo (ORCPT ); Tue, 18 Jul 2023 19:07:44 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BB966198C; Tue, 18 Jul 2023 16:07:39 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 4EA1161372; Tue, 18 Jul 2023 23:07:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 511EBC433C7; Tue, 18 Jul 2023 23:07:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1689721658; bh=Kbw3H9b8MZrMJc5p9llXiiMmksLCzNjk2HDi2Ugf8VM=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=dunnjuSw7zeGIdFvf1JEoPdnlGCN3A/Ggtp6BHKwqAL0SJujGJuNg3pS4TVbb6VOB Cu7KHPFhj9jq7oi2nxLa0FcevZUMHKEoHf8mInYRxEbMBp+lI2J/KBjJs2oHw5Zlhg t6DvMA+C+gHervkP17VMhTflzAeJ3K9Hzd1z9l7jOV28ZY54qPYMWMcbv/UUZNXzqv nt0YW98R4BhfDu2820Fj216DxZgspjLKawLs3yMH63RvjVL9DyJomV3q1FgpsW0BHt 8dwAVYaBk3s+HeknvGRkOAiOvgEEzz4Bf+5JM9J3F1yuMu9Y1mqAF7ZIPET5QFBor8 f3hvaOquPgnUQ== Date: Tue, 18 Jul 2023 16:07:37 -0700 From: Jakub Kicinski To: dhowells@redhat.com Cc: syzbot , bpf@vger.kernel.org, brauner@kernel.org, davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Subject: Re: [syzbot] [fs?] INFO: task hung in pipe_release (4) Message-ID: <20230718160737.52c68c73@kernel.org> In-Reply-To: <0000000000001416bb06004ebf53@google.com> References: <000000000000881d0606004541d1@google.com> <0000000000001416bb06004ebf53@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 12 Jul 2023 11:54:33 -0700 syzbot wrote: > syzbot has bisected this issue to: > > commit 7ac7c987850c3ec617c778f7bd871804dc1c648d > Author: David Howells > Date: Mon May 22 12:11:22 2023 +0000 > > udp: Convert udp_sendpage() to use MSG_SPLICE_PAGES > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15853bcaa80000 > start commit: 3f01e9fed845 Merge tag 'linux-watchdog-6.5-rc2' of git://w.. > git tree: upstream > final oops: https://syzkaller.appspot.com/x/report.txt?x=17853bcaa80000 > console output: https://syzkaller.appspot.com/x/log.txt?x=13853bcaa80000 > kernel config: https://syzkaller.appspot.com/x/.config?x=150188feee7071a7 > dashboard link: https://syzkaller.appspot.com/bug?extid=f527b971b4bdc8e79f9e > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a86682a80000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1520ab6ca80000 > > Reported-by: syzbot+f527b971b4bdc8e79f9e@syzkaller.appspotmail.com > Fixes: 7ac7c987850c ("udp: Convert udp_sendpage() to use MSG_SPLICE_PAGES") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection Hi David, any ideas about this one? Looks like it triggers on fairly recent upstream?