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 96A2B4A538 for ; Tue, 26 Sep 2023 21:38:33 +0000 (UTC) Received: from mail-oi1-x246.google.com (mail-oi1-x246.google.com [IPv6:2607:f8b0:4864:20::246]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C47EF17EB5 for ; Tue, 26 Sep 2023 14:38:29 -0700 (PDT) Received: by mail-oi1-x246.google.com with SMTP id 5614622812f47-3ae5ac8de14so4340823b6e.2 for ; Tue, 26 Sep 2023 14:38:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695764307; x=1696369107; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=MrujW9fuUJnGCukcO08Sc48BocArkHwApSrdDVAkMsU=; b=qD7a7shB3IGQhuv+NMyBUd+Kwd6FRcKa0JTol8JJOScJhUer0qV20W9Rs3Wijiv2B4 ljaSVbaHCU5On1xfNjQoyhzoAtG4ceobgT1LbJVrUKZeWGoL5lh9Sv3XZD6LcT93MuqG YaimW0dTn953Agm7LTNUld/OV0TnAXmWkpYlsDjJh3kZzn7En2XrDiW4NObyCl4N+iAM 8ahcxexLntAaugqVPSofMy90xzS2CI9AlRsXAmm89OsrEb4aYBDwejyUx0MscewoGMSw V5xGdpC5t58bSGm+pMOvxUjoEWLyeNJcZ0RzRF5S38zC4N4wlkH59ekdzUAs8J3x9Frn U4Lw== X-Gm-Message-State: AOJu0Ywqa1D6J2BG8aNQkh431m3aUEB06VK/pXvEd8Brx8zqSke8V5yV GbFqbpyKTPMt/kAyhmhS4fI8MNCAZypSBg4l8NjW+DPJhNdo X-Google-Smtp-Source: AGHT+IHqUNvgj8r/sXHE/1psfIuTkefZXsSeZ3RVACSIBoFlYFfchd4gvfMw4G4oZMJnX1y+ZSBluLCG4GwUpEjncSbmx9hI9CeO Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:2018:b0:3ae:1e08:41e7 with SMTP id q24-20020a056808201800b003ae1e0841e7mr90974oiw.9.1695764306911; Tue, 26 Sep 2023 14:38:26 -0700 (PDT) Date: Tue, 26 Sep 2023 14:38:26 -0700 In-Reply-To: <0000000000002c6cf80606492f14@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000022eedd060649e522@google.com> Subject: Re: [syzbot] [bpf?] WARNING in bpf_mprog_pos_before From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, haoluo@google.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, martin.lau@linux.dev, netdev@vger.kernel.org, sdf@google.com, song@kernel.org, syzkaller-bugs@googlegroups.com, yhs@fb.com, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=0.9 required=5.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_BLOCKED,SORTED_RECIPS, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net syzbot has bisected this issue to: commit e420bed025071a623d2720a92bc2245c84757ecb Author: Daniel Borkmann Date: Wed Jul 19 14:08:52 2023 +0000 bpf: Add fd-based tcx multi-prog infra with link support bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=116ab4b6680000 start commit: a59addacf899 drivers/net: process the result of hdlc_open(.. git tree: net final oops: https://syzkaller.appspot.com/x/report.txt?x=136ab4b6680000 console output: https://syzkaller.appspot.com/x/log.txt?x=156ab4b6680000 kernel config: https://syzkaller.appspot.com/x/.config?x=d594086f139d167 dashboard link: https://syzkaller.appspot.com/bug?extid=b97d20ed568ce0951a06 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10dc3946680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=107f4e1e680000 Reported-by: syzbot+b97d20ed568ce0951a06@syzkaller.appspotmail.com Fixes: e420bed02507 ("bpf: Add fd-based tcx multi-prog infra with link support") For information about bisection process see: https://goo.gl/tpsmEJ#bisection