From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (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 025A425A64C for ; Fri, 11 Apr 2025 18:26:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744395965; cv=none; b=Q76BCzsDOV7jLdTgvjEK/yYZxQKgR4l5e9OS0HfFVOm15kUiZZb+ypUuHbzlgmRot1o/YuxGILnZSWwVQMp36QiwkCX6Ez0GqZ5Xk5746SLNQ6jdDl3yU8hvzuUGCkCaFcKaIRyk7uG/dD+O6fSkb3kLpFkMGM9X6Li/gY7uz2g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744395965; c=relaxed/simple; bh=FbuPgtFhOayFXRCeRx4jaZPr2zr7ESJ0SMJ61nHuDP0=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=meoNbDB5CpUbMTFG8kPUP6hSjYVxVoOEQjGTQqfy0ZbWHzhJFxSKyu2DcQ8RB9hOE7O2Kf35fBC+Ti4JzBC+jVsSzhN7zS6nLvcVQXp4+t2sM39EgcVG/jMPB0ZyZX001ONfAAE+BGWXuwj40n1FVQQy3wlCOs5jiuGtrylW+yo= 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=209.85.166.198 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-f198.google.com with SMTP id e9e14a558f8ab-3d44ba1c2b5so22504795ab.2 for ; Fri, 11 Apr 2025 11:26:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744395963; x=1745000763; 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=Oep1B6SY2KQszl07sbFPKf10Dwezvq6DfuJGojLWC/Q=; b=Vf8cP/0FEIXbrbPPDOFdEjJH2tLefJWXhXyNwWRk5Y/6g9kueCrHjl79++H26RR1KN tvyRieh+qLOLwOkOxscmD/sDQVERi0v/YV1EMfPM1jOidHXC33gi6qIrIm+rQ1ccw+uX H81zcdUIVN4hzK9CmOVXdh6s+bpYoJXgXuW1QQBdz3Q2nJzQG/lJ3DZwALJc3FF3+Tin I7hlQtOqMW+UIX/xlK0XXW9XhCs4aFVOZ6I9qfeloMAeyBH9+hUN+5vFqvWZfPtSe6lN D9LKKjEklFQ4H/mTLXYkhXptQUSE7JJSWCgUzAXexS92ufN1nwc5ectMkgG4IWkwFd08 Wdmw== X-Forwarded-Encrypted: i=1; AJvYcCVNBDMeWH0To/QWVGbPWJ+lOuRoNQWxS9L16IRlHQVDK891wFEBW7bkeQbfnHYyZKkX4RMRdtmGZJOuGU0=@vger.kernel.org X-Gm-Message-State: AOJu0YzkZ7c3E1zUgND8lj+m/q1h7JxsLu/bXTeVnpAjiVoZq/q7EFJh Zl177NBK0hwLlw9shCmrDReeZN0TMz0Ydz2FIwuLY3Jis84FRi4nFhEIEIOaqcCUxQDaaiL6Gr4 L9SH2FIeZCfXCLqGmIM83l+8EQnmP+6nwkXZaj+E9uTEKKsi3XkTBeJc= X-Google-Smtp-Source: AGHT+IEF8NVjcw48tJ2IzsNR2+B21DrKyj5N3+MwQw+yUyD3QPh0wu7ffoDgBXqWyuUk2peJinJNkjCNdJMxdaiJbpaISygUlD6M Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1521:b0:3cf:bc71:94f5 with SMTP id e9e14a558f8ab-3d7ec27b01amr48319985ab.22.1744395963111; Fri, 11 Apr 2025 11:26:03 -0700 (PDT) Date: Fri, 11 Apr 2025 11:26:03 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67f95ebb.050a0220.2c5fcf.0007.GAE@google.com> Subject: Re: [syzbot] [bpf?] possible deadlock in __bpf_ringbuf_reserve From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, kernel-team@meta.com, kkd@meta.com, linux-kernel@vger.kernel.org, martin.lau@kernel.org, memxor@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: unregister_netdevice: waiting for DEV to become free unregister_netdevice: waiting for batadv0 to become free. Usage count = 3 Tested on: commit: a650d389 bpf: Convert ringbuf map to rqspinlock git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=17928870580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ea2b297a0891c87e dashboard link: https://syzkaller.appspot.com/bug?extid=850aaf14624dc0c6d366 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.