From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 674A77E9 for ; Sun, 21 May 2023 02:26:34 +0000 (UTC) Received: from out-50.mta1.migadu.com (out-50.mta1.migadu.com [IPv6:2001:41d0:203:375::32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1A34912A for ; Sat, 20 May 2023 19:26:33 -0700 (PDT) Message-ID: <048219d7-2403-b898-129f-a0f85512cdf5@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1684635990; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=t/ZpxMQ8Ylpc/R+35Ghc5qquHo+Bz5A9wc6kWaeW7Dg=; b=tFPhMscgu4nSy6Uu1xDdXqUdhAWEuc7/Dz4AVNeEENdJRCvKSCNHgt+79M+RPo2B/XaOY4 vc6TaZgw9KNb/iDZP1167ajPfFzlOP2kZNpK2s9xPdDD/1IQvKT5Vcve7OlTRjYnbB/KCZ bae77+HcxYbrAQtnghIE2uHaPuh8vz8= Date: Sat, 20 May 2023 19:26:22 -0700 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [syzbot] [fs?] INFO: task hung in synchronize_rcu (4) Content-Language: en-US To: syzbot , syzkaller-bugs@googlegroups.com References: <000000000000baea9905fc275a49@google.com> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Martin KaFai Lau Cc: amir73il@gmail.com, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com, hdanton@sina.com, jack@suse.cz, kuba@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, penguin-kernel@i-love.sakura.ne.jp, peterz@infradead.org, torvalds@linux-foundation.org, willemdebruijn.kernel@gmail.com In-Reply-To: <000000000000baea9905fc275a49@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net On 5/20/23 3:13 PM, syzbot wrote: > syzbot has found a reproducer for the following issue on: > > HEAD commit: dcbe4ea1985d Merge branch '1GbE' of git://git.kernel.org/p.. > git tree: net-next > console output: https://syzkaller.appspot.com/x/log.txt?x=123ebd91280000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f20b05fe035db814 > dashboard link: https://syzkaller.appspot.com/bug?extid=222aa26d0a5dbc2e84fe > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1495596a280000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1529326a280000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/41b9dda0e686/disk-dcbe4ea1.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/64d9bece8f89/vmlinux-dcbe4ea1.xz > kernel image: https://storage.googleapis.com/syzbot-assets/42429896dca0/bzImage-dcbe4ea1.xz > > The issue was bisected to: > > commit 3b5d4ddf8fe1f60082513f94bae586ac80188a03 > Author: Martin KaFai Lau > Date: Wed Mar 9 09:04:50 2022 +0000 > > bpf: net: Remove TC_AT_INGRESS_OFFSET and SKB_MONO_DELIVERY_TIME_OFFSET macro I am afraid this bisect is incorrect. The commit removed a redundant macro and is a no-op change.