From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f69.google.com (mail-oo1-f69.google.com [209.85.161.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A6FF7F5 for ; Tue, 12 Dec 2023 04:26:03 -0800 (PST) Received: by mail-oo1-f69.google.com with SMTP id 006d021491bc7-590caa98510so3344729eaf.3 for ; Tue, 12 Dec 2023 04:26:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702383963; x=1702988763; 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=IB8C7XyMYQp9js6I3u3+HREkfx35O/WPhq62642Tn6U=; b=ftmJG6TLUM4DhUvekJu3QhJ8AfuKUASYUsv2nwt0MkPBrYddScjKTMWHNGeaSqZJAS J2JXhwutaeRRgoHwo0YCcrqplhjGm2wT8uTk0y0zLlh1BbQBK+J52ofWFrO69HLeBajN GoLpOlCO1vX7PcIi5oPnt+sEKBxhfb06uDqAmD8WqfRMF3f1l5CIIsDqI0A3IBXniVNZ j6gKjzH4G6h8e0KRXPgc/RejHZgXOofdTye8Nw55zSu+2bcB2fxDzwt+giBKWBDO6uQF aUSm8LsDJZ0wXTgY/TWgPfxoDnYxeHXWiR/XpcGqDA+NeHtJ+oImyCdEAkpVs2QPdtWv 8EuA== X-Gm-Message-State: AOJu0YyhGorMH+O0UlG4Zhc0zxPUWeCk7ziebVb4sebFBCxDPlGk/Drf GDm0wPOI06j3DK9lJzhDLDNoTgR7WfEUKNM1sFVoxeP+AJDd X-Google-Smtp-Source: AGHT+IGFW5g3e6mA+LgWx2H/a9Cj4ZanQsFcd4iCXcghjcM04EBeoSn1GE5TRIxUvox8ZXjQik4AEtVZhFon/5TqCSJsXq9c+Xd+ Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:3149:0:b0:58e:2832:83d5 with SMTP id v9-20020a4a3149000000b0058e283283d5mr2236155oog.1.1702383962863; Tue, 12 Dec 2023 04:26:02 -0800 (PST) Date: Tue, 12 Dec 2023 04:26:02 -0800 In-Reply-To: <000000000000e7765006072e9591@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000060c000060c4f2747@google.com> Subject: Re: [syzbot] [bpf?] [trace?] possible deadlock in task_fork_fair From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, brauner@kernel.org, daniel@iogearbox.net, elic@nvidia.com, haoluo@google.com, jasowang@redhat.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, martin.lau@linux.dev, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, mst@redhat.com, netdev@vger.kernel.org, parav@nvidia.com, rostedt@goodmis.org, sdf@google.com, song@kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit a3c06ae158dd6fa8336157c31d9234689d068d02 Author: Parav Pandit Date: Tue Jan 5 10:32:03 2021 +0000 vdpa_sim_net: Add support for user supported devices bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14c0b21ee80000 start commit: 2ebe81c81435 net, xdp: Allow metadata > 32 git tree: bpf-next final oops: https://syzkaller.appspot.com/x/report.txt?x=16c0b21ee80000 console output: https://syzkaller.appspot.com/x/log.txt?x=12c0b21ee80000 kernel config: https://syzkaller.appspot.com/x/.config?x=f8715b6ede5c4b90 dashboard link: https://syzkaller.appspot.com/bug?extid=1a93ee5d329e97cfbaff syz repro: https://syzkaller.appspot.com/x/repro.syz?x=148b2632e80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11aae88ee80000 Reported-by: syzbot+1a93ee5d329e97cfbaff@syzkaller.appspotmail.com Fixes: a3c06ae158dd ("vdpa_sim_net: Add support for user supported devices") For information about bisection process see: https://goo.gl/tpsmEJ#bisection