From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 6DFDB1E990C for ; Wed, 15 Jan 2025 11:47:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736941624; cv=none; b=GAAkmX2XV3HtJZODQ85p8pVfBcsuURm+ZB3UK7HB+sVxYM9ZhVEgssW/mcK//xrbkGVFKTug5wV2BCobz4z20CgnNJ1oNln25VnaryrDav6LmV8F2eGFtpQEKm4Kmk7yG4zD/ttK/3MzbU5/E9TJWvgetK9ZrNGxvu0f4UIaly0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736941624; c=relaxed/simple; bh=/1uFD+772lAt1hJfYVdZ7oeg/thMmcYi5G7yE5q11iU=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=mivCPZ+Y6TUXgueMI6wP7VBIKGNG4ViQ4lplnDe/7RzlbH/Y084QC7PDP57JDafD9dlEr/bmzHFa++8FUt/fUXGFw1R12UyJvZgq05vrCQhb+ueO+ffwES3oIw7z/jLLKDOgLACG++bFcujVmYAwdSkZJjF2KQGqWKS59eYhrvQ= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-3a814bfb77bso7184715ab.0 for ; Wed, 15 Jan 2025 03:47:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1736941622; x=1737546422; 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=7CD8/bky+uBTitY/VMmrxb7nNioNYcVEol6ONXDjRus=; b=Z+TQp++rV0Niq9UeFkLPjzf85LEQm77zIh02C+VhvuJLdnw6C+m3IwDjvGwP5h+bir jDbsWhtlR68vFn0PyNO1TdNOcIabfffOYCSdY5EwMhtSLxMyLju5bWBRv61Szz1zwhZH xb3AzDrKtSVnK5zWIDqdLCcu+Kos8DiV34IL3DWlxrKqUyOwtjyK0yGc3EHFIRxiwRDt SwRq5BqKG9vwptLBWp3eoRRIWxCYjfPyXJ8JGwR85CDHB6s+mSNXdfqVOCl7vi2SrNlT h5tSWYdyYC9IoCCut74uGz0yPLr2Yd7LHpNoFGlAOizeshxI+NJbQ0JXmjEF1fGmMXM3 NLsQ== X-Forwarded-Encrypted: i=1; AJvYcCVLodAGO6mDRQ9woRprR/tR8agoUhWf+VaRGSgNQ2ov+5tC2w6xMFZ80xecBHezM52u1+k0cbu6dYw0p0s=@vger.kernel.org X-Gm-Message-State: AOJu0YzfQ9HkI6hXxw0v/67x4fuJFWWog9/ZG2DBRSfJ+vxe5Ojks396 VvBoL4B5Ek9JXjAGjJR63UzNCdDBXjiQ6hyinIhyotkSi3BQGPE/vNv1CftcUF+2efXmjLi+eRw FFLhnW0ZgH40lTF621jUtv28a9YJpL2OeXYG8EXsbRv47QC5Fmb6UPGo= X-Google-Smtp-Source: AGHT+IESRd48rHGhudr/W5hTp4VTLrRNTk1+2Ra6errEaQt8aLT30h/PAr+bUUEcI7mPJrigCPSOnyk0dxCyxgomNR6tKHtcwEEf Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:20e3:b0:3ce:7cc9:9f46 with SMTP id e9e14a558f8ab-3ce84a25bf6mr18998895ab.9.1736941622558; Wed, 15 Jan 2025 03:47:02 -0800 (PST) Date: Wed, 15 Jan 2025 03:47:02 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6787a036.050a0220.20d369.0012.GAE@google.com> Subject: Re: [syzbot] [bpf?] [trace?] WARNING: locking bug in __lock_task_sighand From: syzbot To: alexei.starovoitov@gmail.com, andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.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, mattbobrowski@google.com, mhiramat@kernel.org, puranjay@kernel.org, rostedt@goodmis.org, sdf@fomichev.me, song@kernel.org, syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: lost connection to test machine Tested on: commit: c547a7b6 bpf: trace: send signals asynchronously if !p.. git tree: https://github.com/puranjaymohan/bpf.git bpf_preemt_fix console output: https://syzkaller.appspot.com/x/log.txt?x=178257c4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=aadf89e2f6db86cc dashboard link: https://syzkaller.appspot.com/bug?extid=97da3d7e0112d59971de compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.