From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 930A7342CB6 for ; Wed, 5 Nov 2025 19:56:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762372591; cv=none; b=EJ1zsdBHtUVxMu+/+Mz0vBV2udUHQGb/liZIoFyvBg6MRXk2mV8zI1AKmtmOcDuujlalSMExfUPjJ3zZXyL5MDibA9xN+IB7GVKQqudqSBJNOqdKb2QWr1iCy+aZQIFQRPNgIuaM+Nqe3TuigcuUbz9Pk3xUboQfOFdvG8ZEio0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762372591; c=relaxed/simple; bh=DA/TgFcrQsJdkNiib746rgjUVZmzRttIe9da/NbC0fQ=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=cSRE8KgmRDmSJK8uAf1BOewNagDTG4CcmF2G5sSPjHkHsUjRN5SLIrbO3vAYG7qbpidMNQVwebdTfL/P0qEFZEUK6Jd7Hth62osqnf3ymzR5m3R+u/voXA4jVS2h/l9MdfUdveRvb3kSeprKp8bgVnj0HltUfTRwQi2f6eInZQE= 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=209.85.166.205 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-f205.google.com with SMTP id e9e14a558f8ab-43331987addso4385975ab.2 for ; Wed, 05 Nov 2025 11:56:29 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762372588; x=1762977388; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=DsJIerXbiX87dCz1LLhmZWGziBLNayY2WNg901pyJbA=; b=VUV6dLm0Q/8gXqw3nQCeMjuvLvsZexjYGVQEnmfU7J1RBsN8Fxn1Nl+vPEwuyXhz3u Y+c+a6OjWDtmPfLR7DJ+Lg1pE/IjcULjFebijUq+qg5qTebXewPXe8qdpQFuQzaeEZLk gZqbqt/0hOHQIa3mvUsczyDu+YYZ4TsoCmwBLI/+T+Dk3l5MaETaeWM47qpPysspOKBf wZG/yIxq/8kREXoKIQktq+GOVDRVbhZaIdq/pOveyXXAsLg1twXthvxCvETx2FyFwh/Y n90lK0IArqEXmZCvVISHHHFTJQj1l3cCj84jyoJ0qmx2WBgQ81WRWfVJTerxEVwf2tbJ dzsQ== X-Gm-Message-State: AOJu0YzdEryYi8p0zzhKP+SqMgvoJFJ3sJObs3idO+fs2d6jvb9Uk78Q 6iJVjtnI5X/NmrAWpw1pk+zslHStAem5gG4rvE8jDklMVoU5LcBEGpQbyv9g1zyf1LJT+EY65Ki K66tmkcVXZ6or3cjbECMfKP98Wx/Ftaij4yDlTziKtHywFPp+HqRKr3Icfb9wRw== X-Google-Smtp-Source: AGHT+IEwPu4aVxUjew24tnX4NK4p2HgqB3ivS5W1s02DNQalhuoV3OG/emTB2nC2LCQlj298Nc6cOTffAMSkxW9WvQtOVEJISneK Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:216b:b0:433:2aac:c540 with SMTP id e9e14a558f8ab-433407a409emr71594115ab.14.1762372588688; Wed, 05 Nov 2025 11:56:28 -0800 (PST) Date: Wed, 05 Nov 2025 11:56:28 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <690babec.050a0220.baf87.0064.GAE@google.com> Subject: [syzbot] [trace?] WARNING in ring_buffer_map_get_reader From: syzbot To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 691d401c7e0e Merge tag 'spi-fix-v6.18-rc3' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1388b932580000 kernel config: https://syzkaller.appspot.com/x/.config?x=19d831c6d0386a9c dashboard link: https://syzkaller.appspot.com/bug?extid=92a3745cea5ec6360309 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5eaccda03e4f/disk-691d401c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0df5294a69bc/vmlinux-691d401c.xz kernel image: https://storage.googleapis.com/syzbot-assets/f4f242731772/bzImage-691d401c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+92a3745cea5ec6360309@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 9655 at kernel/trace/ring_buffer.c:7348 ring_buffer_map_get_reader+0x676/0x8e0 kernel/trace/ring_buffer.c:7348 Modules linked in: CPU: 0 UID: 0 PID: 9655 Comm: syz.2.14601 Tainted: G U W I L XTNJ syzkaller #0 PREEMPT(full) Tainted: [U]=USER, [W]=WARN, [I]=FIRMWARE_WORKAROUND, [L]=SOFTLOCKUP, [X]=AUX, [T]=RANDSTRUCT, [N]=TEST, [J]=FWCTL Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:ring_buffer_map_get_reader+0x676/0x8e0 kernel/trace/ring_buffer.c:7348 Code: 02 00 00 49 8b 0c 24 8b 74 24 3c 4c 89 f2 48 c7 c7 a0 09 93 8b e8 7a 1d da ff e9 e2 fe ff ff 4c 8b 74 24 58 e8 7b b0 fb ff 90 <0f> 0b 90 e8 72 b0 fb ff 48 89 df 31 db e8 88 f6 fd ff 48 8b 74 24 RSP: 0018:ffffc900053b7db0 EFLAGS: 00010083 RAX: 0000000000000773 RBX: ffff88813ff28800 RCX: ffffc900130af000 RDX: 0000000000080000 RSI: ffffffff81c0bcd5 RDI: 0000000000000007 RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88813ff288b0 R12: ffff88813ff288b0 R13: 0000000000000000 R14: ffff88813ff28818 R15: ffff88813ff14c00 FS: 00007f5e1e7046c0(0000) GS:ffff888124a10000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32a12ff8 CR3: 0000000021b1c000 CR4: 00000000003526f0 Call Trace: tracing_buffers_ioctl+0x2bd/0x370 kernel/trace/trace.c:8717 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5e1d78efc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5e1e704038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5e1d9e5fa0 RCX: 00007f5e1d78efc9 RDX: 0000000000000000 RSI: 0000000000005220 RDI: 0000000000000004 RBP: 00007f5e1d811f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5e1d9e6038 R14: 00007f5e1d9e5fa0 R15: 00007ffcaeda0b48 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup