From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 08C3028980E for ; Fri, 4 Jul 2025 08:34:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751618045; cv=none; b=Qnens86BpsvoTKNVgs9hUauSWEk4lAkRomQRri2RGZ8L1hE+ETTuSfyTvpX3uaE6+b80iZyVykk8GK8CyWtoS+VXeIo6cbKa7EpHHlLQjNiaDAh1/wL51O6GABEklX0+m8lo9+mHgtSxzxrOcD73ymJSo/izdgNpr0VOggly4PA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751618045; c=relaxed/simple; bh=zpjaHVU9o3w1AU1ZPc7ZQ1mQ782dEOQ2yNVsFLOdCUU=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=aQUiSjt5WusyLjEIwJOrIkKE+Pj9c7JGEbJQsLlwhipIlLgJa4oCmChvrX6/3cRm/SsQ6dCPQeBtDcYf2802wLGD5jR76hn54RZHGim021KRHtIxmCBfe3LrX+6d5pyCcHiXV9w4KZ3xRgjr4I3eWYcJ1bxlFDV0F4ahxhLo9Tc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f197.google.com with SMTP id e9e14a558f8ab-3df6030ea2fso17233745ab.1 for ; Fri, 04 Jul 2025 01:34:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751618043; x=1752222843; 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=iGyzmkda1O439XWhlwqgi+PPwho0P8q0N0XZCBhneyc=; b=mQv9hHTeIAh32DpFLWnD98tgf+VPjn8kbr8hcffvX/QlwgGsMn5v+HwKQnxScbpu5w PtRDYR7AMxiswp+Tabm1at7TbklWb5Le0Ws2QAfFWmpuoj5WqVCN1L3dtQr0+wQvCWwD D7SlrXfcmPhWGs35Jv4+QY36GVw616T+/Vu+dQa8YxeH2SfBrMUnm1f8hYrRnXwESR2c gUZtwRVdkErqHuM/B2cMyXSDCg1eMQbLN1W8d5wQ7CK9Axi7Yu+4rXIFXW9D3BHOT8qk GF1PENWVz5fjxOvQuGeL8rPU1dtd14gtZ3yZU46MaQdVshKwGhnJr8TrPqarU8CYDF2T 9/BQ== X-Forwarded-Encrypted: i=1; AJvYcCWANd8YAiTc7GGG2PljnwUXrcAxJGDovtHAshMdwwcX5n+XtDBxWuJKYOo0etVWN86pF1XZCXI=@vger.kernel.org X-Gm-Message-State: AOJu0Yz4r0KbiMP65bIlyPBawI2C5GkYyxxXG/TEBmtX6rvC6qedmOqp B+PUsx7ag6gkUUwfr2tvcJYuDmb3aZveTqPWWnLM5w3XxgbQ8slU7q74R2bIGkPlUGmVjPVN7Di hp3ZP9NroOD2qWZ5hosrh502UViuY1vetGfEl91jKvP23ZiooXWACR+n/F5U= X-Google-Smtp-Source: AGHT+IGq3iGVa8EGg2H3nidF1Y5oAB/PEaq8fbEsYWECa2At0F9aiZr+qUsebKd63Uwb4ZWqNZ3pAzqOoxWnNHU/LK8aNsnj8ZqN Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1887:b0:3dd:f813:64c5 with SMTP id e9e14a558f8ab-3e13561cf90mr16307775ab.22.1751618043239; Fri, 04 Jul 2025 01:34:03 -0700 (PDT) Date: Fri, 04 Jul 2025 01:34:03 -0700 In-Reply-To: <686764a5.a00a0220.c7b3.0013.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <686791fb.a70a0220.29cf51.0014.GAE@google.com> Subject: Re: [syzbot] [net?] general protection fault in qdisc_tree_reduce_backlog From: syzbot To: davem@davemloft.net, edumazet@google.com, hdanton@sina.com, horms@kernel.org, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, lizhi.xu@windriver.com, netdev@vger.kernel.org, nnamrec@gmail.com, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 103406b38c600fec1fe375a77b27d87e314aea09 Author: Lion Ackermann Date: Mon Jun 30 13:27:30 2025 +0000 net/sched: Always pass notifications when child class becomes empty bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13678582580000 start commit: bd475eeaaf3c Merge branch '200GbE' of git://git.kernel.org.. git tree: net final oops: https://syzkaller.appspot.com/x/report.txt?x=10e78582580000 console output: https://syzkaller.appspot.com/x/log.txt?x=17678582580000 kernel config: https://syzkaller.appspot.com/x/.config?x=36b0e72cad5298f8 dashboard link: https://syzkaller.appspot.com/bug?extid=1261670bbdefc5485a06 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=164d8c8c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14839ebc580000 Reported-by: syzbot+1261670bbdefc5485a06@syzkaller.appspotmail.com Fixes: 103406b38c60 ("net/sched: Always pass notifications when child class becomes empty") For information about bisection process see: https://goo.gl/tpsmEJ#bisection