From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) (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 049663164C5 for ; Tue, 26 Aug 2025 18:03:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756231420; cv=none; b=Yt94ZJYZYfJACVa6tuoBfKT23rWXEM1qEi9tTXz/kMtgkBIoABdkCBjzBIPi/zOUi3GYYVjiefVTTE54xcKU3SwvIS77fXF4Vf0fwYXYCXGYJbsi4w+9RfHRmisL70cllr6VkORR9uTD6v7QrxWcEHPDiBTb/dQVW85PTli7iDw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756231420; c=relaxed/simple; bh=9Fd/OGAbNTjvQVsCC770Cymc9rBqjfYkhbkSQm0cn5w=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Nq+HlASyQsWky2+apKgXRbiktaOuVo1ratINzy++jwvqru9EhbgUjQpXxDO8wdYAYH/TQ9QcbPTM9hmqo7gLwnsoNQGI56CAaDCwcUVyGhycNafjhP6m5WK9g3b7unjW17rCMB28RnB+qEuwXsakP5lba4vBWy3zvSUQ7mfvobo= 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=209.85.166.207 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-f207.google.com with SMTP id e9e14a558f8ab-3ed0f07fca2so25626675ab.0 for ; Tue, 26 Aug 2025 11:03:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756231418; x=1756836218; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=jee1SPohgLWvDGFphulqzmgE+y+1pMrI8cs2Wryp8LI=; b=w8oZMHFtd77sKH67HXRtz3oGFL1/W2+XosuYBiXbcu9hbA1NJVTXN/fb9BdRyEc1DY yEvbl2s0rmVbX1KrmSqNl6QKUTzm4Bx33nwNureVKe81GOHTmtDQ84O5zQQwQSZfHmpG mD8OHoOJkqvqDlVAV8QZU4VR01SVnahitCkUbsU5yBpCpI+Y0XFV5lOj6OC9O+Uc3jdl C0s5OT65DosTxkBXjPDumzsbJEpfKfIyIIvIolHj+fYmYksMkcVe5XwXvw6Vd+99j4pI JGPk+s+TbuZd+mS4W6n+FzeE7Gkn4NOsbJnYHgvp8bgn2XDusirbTAMkA/Nad9+t0wGX thwQ== X-Forwarded-Encrypted: i=1; AJvYcCWpv5rqFO5rykOf5z50RMIQQ/5u/EJir645XexO1dUE2xJAwVh8XZ1LEMC8Zbo+hRSKkKgXIqA=@vger.kernel.org X-Gm-Message-State: AOJu0YyiRhjW5fP0Fd6WMQ4LBENg1vSaP1MVeMtD7hcFe8E+D6/Zq6vj 83U2TlFHFdeInntBA/e0GaxDJEk+Z+mD83Ew4RrYUlWoJez2Sdfe9tfkSGYBHNGCYfPsTqH81hR xYUjeCIKmFrmfkjy0Mvn2HuY/b6DxImbZmICteDE9uZ6WraF3IsAJU8OdOQA= X-Google-Smtp-Source: AGHT+IHM/4UQBgBxVmC3OCA6lszfoFadB711vNP2kTRVMK/pKoDB1iqhG9SN5miGqY7xLnxk8K2+Xkr0y3OgsVzWrsCGxE9uSgzq Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c268:0:b0:3e5:4631:54a5 with SMTP id e9e14a558f8ab-3e921f3be05mr272322575ab.18.1756231418094; Tue, 26 Aug 2025 11:03:38 -0700 (PDT) Date: Tue, 26 Aug 2025 11:03:38 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68adf6fa.a70a0220.3cafd4.0000.GAE@google.com> Subject: [syzbot] [net?] WARNING in est_timer From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 8d245acc1e88 Merge tag 'char-misc-6.17-rc3' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1056cef0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e1e1566c7726877e dashboard link: https://syzkaller.appspot.com/bug?extid=72db9ee39db57c3fecc5 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14a4b062580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/096739d8f0ec/disk-8d245acc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/83a21aa9b978/vmlinux-8d245acc.xz kernel image: https://storage.googleapis.com/syzbot-assets/7e7f165a3b29/bzImage-8d245acc.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+72db9ee39db57c3fecc5@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 29 at ./include/linux/seqlock.h:221 __seqprop_assert include/linux/seqlock.h:221 [inline] WARNING: CPU: 1 PID: 29 at ./include/linux/seqlock.h:221 est_timer+0x6dc/0x9f0 net/core/gen_estimator.c:93 Modules linked in: CPU: 1 UID: 0 PID: 29 Comm: ktimers/1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:__seqprop_assert include/linux/seqlock.h:221 [inline] RIP: 0010:est_timer+0x6dc/0x9f0 net/core/gen_estimator.c:93 Code: ff c7 42 80 3c 23 00 74 08 4c 89 f7 e8 6d 3b 41 f9 4d 89 3e 42 80 3c 23 00 0f 85 54 ff ff ff e9 57 ff ff ff e8 45 05 e2 f8 90 <0f> 0b 90 e9 63 fd ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 65 fa ff ff RSP: 0018:ffffc90000a3f7a0 EFLAGS: 00010246 RAX: ffffffff88dc56fb RBX: 0000000000000001 RCX: ffff88801caf1dc0 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: ffffc90000a3f8b0 R08: 0000000000000000 R09: 0000000000000100 R10: dffffc0000000000 R11: fffff52000147f0a R12: 0000000000000008 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88814a58d468 FS: 0000000000000000(0000) GS:ffff8881269c2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc221f97d60 CR3: 00000000320ec000 CR4: 00000000003526f0 Call Trace: call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x648/0x970 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x22c/0x710 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] run_ktimerd+0xcf/0x190 kernel/softirq.c:1043 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:160 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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