From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 693181EA7C1 for ; Fri, 21 Mar 2025 20:52:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742590356; cv=none; b=tiP/V4lFfSY6ue2y6CyaOuwYXTInrdpp7IAzSzi+1Nxs39avG7O+R7eOcRzqpcdtSBgQGxoBlweyaDbWYDy3P+DjudqCz9lLp4V4Yw7bpYGoXO9F8uT3rrkTlA3miM2m2TsyCHP8IeXOpVsKO6HU03sB7kqv0OzBFD9O0eBtaC0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742590356; c=relaxed/simple; bh=1ruPwAFTSeUmwnybrPUf8yknRn5ZwG4995iMw4N1hEs=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=YZOWWxz5RWIhcNFfKyXbDjl4MzKec0j6GT/AuvlBnvlim+LnSzf4QhtXXkb8aBDF9DWhM4pj6DCyi+JeAWd0xmWZsuNGUYhfweLcRHcE6UPwxPthNa3Unelov96gUKDjOiPql0D9ubZj+kK2tXOXeF3tK1x7b2OilPlbarMGWcU= 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=209.85.166.208 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-f208.google.com with SMTP id e9e14a558f8ab-3d453d367a0so48465785ab.3 for ; Fri, 21 Mar 2025 13:52:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1742590353; x=1743195153; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=9gwT2TdvYZPN5Kmw5jr9jSQgzyp4IWD+53j2MRRZdwc=; b=vgVhESWoEH8iYZ1RBHFwwrXSpOl+ucLDVhvhaTIF43a7yW15Oz1lLNBhgNAdya9uR/ Elg5K0VXLSKGTfuoERXBVJjoh6ytBRz0kWpuppctmLQ7QqBeOpxgDnX7qvQIcW+g7b/P NfgkVxxvHVFQ2LHQud5rHaqs0zPQa3R+QzP1C9URd521O884LBwqwO9oeYlJ6UFewt1J GmnydHtfeOHIM5ZZfWfpv2A4mv1xqQo46AoRX2btWsGSWuyzWn0y7QOxzRPfnSPrXmCR Vcm+XxMVYhTfeGIRPtBPf5lZPprvGqfKa5Knh88AlfewGPjAWuqwN29UTZXWrtusgpmE 5UEQ== X-Forwarded-Encrypted: i=1; AJvYcCUc4eSNfP16P6nV/tHLo9GDpyz3xOT5n80alW8AlRULeEzwiFmOE03y7fSv5oVhGXdKJqSYdw==@lists.linux.dev X-Gm-Message-State: AOJu0YwfL48XLVeUedVE0M9toorziPOhTT0duENfX6fpsE0sBjdeLfG3 n/DafIxdZmlcBcFZYBpIxta8YxW+Hf6xUex4d4067pg9xrDgY0A6EzsxlOevrVttvPljnEVb9yv zuae1P5FL5QaflMpU+HYS/02r3aZEd8AwyUw+hyb7BaoRCXVT3u9Vfoo= X-Google-Smtp-Source: AGHT+IHaH1Ps1Rt7vrvTvnJ199mORjTipCRHpKAnDXnM4imxujSV3NkJ1x05d7QXkE8C+uzx0OICZj2w/kTnJazY4An85doOzUIb Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3a0b:b0:3d4:2306:6d6 with SMTP id e9e14a558f8ab-3d5961944f1mr68484135ab.21.1742590353565; Fri, 21 Mar 2025 13:52:33 -0700 (PDT) Date: Fri, 21 Mar 2025 13:52:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67ddd191.050a0220.25ae54.006b.GAE@google.com> Subject: [syzbot] [mptcp?] WARNING in mptcp_do_fallback From: syzbot To: davem@davemloft.net, edumazet@google.com, geliang@kernel.org, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, martineau@kernel.org, matttbe@kernel.org, mptcp@lists.linux.dev, 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: a7f2e10ecd8f Merge tag 'hwmon-fixes-for-v6.14-rc8/6.14' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=101d1e98580000 kernel config: https://syzkaller.appspot.com/x/.config?x=27515cfdbafbb90d dashboard link: https://syzkaller.appspot.com/bug?extid=5cf807c20386d699b524 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-a7f2e10e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d3ebf10742dc/vmlinux-a7f2e10e.xz kernel image: https://storage.googleapis.com/syzbot-assets/ec059da4f420/bzImage-a7f2e10e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5cf807c20386d699b524@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5347 at net/mptcp/protocol.h:1202 __mptcp_do_fallback net/mptcp/protocol.h:1202 [inline] WARNING: CPU: 0 PID: 5347 at net/mptcp/protocol.h:1202 mptcp_do_fallback+0x244/0x360 net/mptcp/protocol.h:1223 Modules linked in: CPU: 0 UID: 0 PID: 5347 Comm: syz.0.0 Not tainted 6.14.0-rc7-syzkaller-00074-ga7f2e10ecd8f #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__mptcp_do_fallback net/mptcp/protocol.h:1202 [inline] RIP: 0010:mptcp_do_fallback+0x244/0x360 net/mptcp/protocol.h:1223 Code: 1c cd f5 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 cb 1c cd f5 90 0f 0b 90 e9 5b fe ff ff e8 bd 1c cd f5 90 <0f> 0b 90 e9 e1 fe ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c 1e fe ff RSP: 0018:ffffc9000d4b75b8 EFLAGS: 00010293 RAX: ffffffff8bf4c3c3 RBX: ffff888053250930 RCX: ffff888000d7a440 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff8bf4c283 R09: 1ffff1100a64a126 R10: dffffc0000000000 R11: ffffed100a64a127 R12: ffff888053250948 R13: dffffc0000000000 R14: ffff888042efd940 R15: ffff888053250000 FS: 00007f03895756c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0389574fe0 CR3: 0000000042c44000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: subflow_finish_connect+0x462/0x14e0 net/mptcp/subflow.c:548 tcp_finish_connect+0xc4/0x620 net/ipv4/tcp_input.c:6343 tcp_rcv_synsent_state_process net/ipv4/tcp_input.c:6573 [inline] tcp_rcv_state_process+0x26aa/0x44e0 net/ipv4/tcp_input.c:6794 tcp_v4_do_rcv+0x77d/0xc70 net/ipv4/tcp_ipv4.c:1941 sk_backlog_rcv include/net/sock.h:1122 [inline] __release_sock+0x214/0x350 net/core/sock.c:3123 release_sock+0x61/0x1f0 net/core/sock.c:3677 mptcp_connect+0x86b/0xc30 net/mptcp/protocol.c:3810 __inet_stream_connect+0x262/0xf30 net/ipv4/af_inet.c:677 inet_stream_connect+0x65/0xa0 net/ipv4/af_inet.c:748 __sys_connect_file net/socket.c:2045 [inline] __sys_connect+0x288/0x2d0 net/socket.c:2064 __do_sys_connect net/socket.c:2070 [inline] __se_sys_connect net/socket.c:2067 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2067 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f038878d169 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:00007f0389575038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f03889a6160 RCX: 00007f038878d169 RDX: 0000000000000010 RSI: 0000200000000000 RDI: 0000000000000005 RBP: 00007f038880e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f03889a6160 R15: 00007ffcae617168 --- 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