From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (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 32D4F24887E for ; Fri, 28 Nov 2025 01:44:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764294266; cv=none; b=npsSy+aLLif0OY22nlwN2aSzzaz2NTOhn+wtuVMcijq+3i60JxjX644IkclcRyUGc9QTOc6W/YHGCEsv9a5lmp5+WpP2j1jwr3DkPxgbijurBdJOFQ20CpPLW/wLc4BAYwn/dalAPwke651Xf3UMxvLgc/0PTlhMJODVum2pXU0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764294266; c=relaxed/simple; bh=m56HVa8izRgipZSOdJjvIpy7h81Ckb2Ri5FLV/zI8TY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=al3IMYG3dqr57EQ5055HuPi7qysrXVF2HnON57b+v3mwc2Wq0Ssvj9enRW0cQnC5lRxEbKCKbI6bSrdVQPNtp+xt+563YzBc65l81kVIwRDPGFg4TI9QzY6XYWdNPjWJj7iwxsFxw506+WcRVamk9Sip3hFck7a4OdjuskWBdtE= 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=209.85.166.206 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-f206.google.com with SMTP id e9e14a558f8ab-4330ead8432so8763345ab.0 for ; Thu, 27 Nov 2025 17:44:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764294264; x=1764899064; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=YGtxlxaVlJyvlWAEowoHTPy95LmRppeiT0GNgF9JGiA=; b=mo+SH0nAhnRSN4GX6YDx/IyQHzH/h0URQr2gLScm0Rr9KLMAC8IVNxObfkcyM/CU96 HriDUZf9X5s+F97h8/v6BZ2PRTutdSNonGYF7ytx9njv4WoT3/kf/dU38y2WOPqwNqqO k9E7LPXURVN3Fg7zC9x8iOnm8NteaPtqGi0d9zWVzzPJ6wuOSmxCqgbBeJOUdj4q/8Pw lPBvYtUB9v10AwEnbq+52eQZSqlBTElFkjx/Rdz0woYaNZcp5WxTYvvLWCcUv9Gn5C0x WbUACiQLiBMKenFvoAecxAk1uXd4GJCjo4ai+ofkvfUIJPXPird2V8/3hL+pcUxt+fE0 SS5Q== X-Forwarded-Encrypted: i=1; AJvYcCUKe+SFyqPJLr3qznyrJsYuv+w4IwzsR42+bE1mhhCTDBaq/tu9jSORgchf1Y+6eyoOdfsZvCjExpeHrjlkyQ==@lists.linux.dev X-Gm-Message-State: AOJu0YzYiGzYemfA533dk9FppJLkfv85TttpgBwxvEvyzwjvzEnzO3tH Il6iCHlNxsXQTXoYSSHwaoas0E1HKPAKLDdSjq8GKUFmbHXtAMqyKGsq49S3MP23R2doJ1azSrX /FN4nLsCnQZS4wfTg2IsZ9zBGO4josCYCz+t46y64HR71Jx5VTN7qBLfSlLs= X-Google-Smtp-Source: AGHT+IFjliyc7o+9/9M8gBBNjRAqkbDhsdQ2w51FRpWCBUOel6GKu5SST4tshzg1ihuSxS3U9kT4JaJcoXhNT+jaj9+AOPhO03fX Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:7:b0:434:96ea:ff5f with SMTP id e9e14a558f8ab-435dd13e462mr107916675ab.40.1764294264424; Thu, 27 Nov 2025 17:44:24 -0800 (PST) Date: Thu, 27 Nov 2025 17:44:24 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6928fe78.a70a0220.d98e3.012a.GAE@google.com> Subject: [syzbot] [kvm?] [net?] [virt?] WARNING in virtio_transport_send_pkt_info (2) From: syzbot To: davem@davemloft.net, edumazet@google.com, eperezma@redhat.com, horms@kernel.org, jasowang@redhat.com, kuba@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, netdev@vger.kernel.org, pabeni@redhat.com, sgarzare@redhat.com, stefanha@redhat.com, syzkaller-bugs@googlegroups.com, virtualization@lists.linux.dev, xuanzhuo@linux.alibaba.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: d724c6f85e80 Add linux-next specific files for 20251121 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12920f42580000 kernel config: https://syzkaller.appspot.com/x/.config?x=763fb984aa266726 dashboard link: https://syzkaller.appspot.com/bug?extid=28e5f3d207b14bae122a compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1458797c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15afd612580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b2f349c65e3c/disk-d724c6f8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/aba40ae987ce/vmlinux-d724c6f8.xz kernel image: https://storage.googleapis.com/syzbot-assets/0b98fbfe576f/bzImage-d724c6f8.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+28e5f3d207b14bae122a@syzkaller.appspotmail.com ------------[ cut here ]------------ 'send_pkt()' returns 0, but 4096 expected WARNING: net/vmw_vsock/virtio_transport_common.c:430 at virtio_transport_send_pkt_info+0xd1e/0xef0 net/vmw_vsock/virtio_transport_common.c:428, CPU#1: syz.0.17/5986 Modules linked in: CPU: 1 UID: 0 PID: 5986 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:virtio_transport_send_pkt_info+0xd1e/0xef0 net/vmw_vsock/virtio_transport_common.c:428 Code: f6 90 0f 0b 90 e9 d7 f7 ff ff e8 5d cc 7c f6 c6 05 c6 5f 64 04 01 90 48 c7 c7 60 da b4 8c 44 89 f6 48 89 ea e8 13 eb 3e f6 90 <0f> 0b 90 90 eb 9e 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 0a f3 ff ff RSP: 0018:ffffc900033a7508 EFLAGS: 00010246 RAX: 2383e4149a9d5400 RBX: 0000000000001000 RCX: ffff88807b361e80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: 0000000000001000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1c3a720 R12: 0000000000040000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc900033a7640 FS: 00005555677a5500(0000) GS:ffff888125b6f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000030000 CR3: 0000000075f06000 CR4: 00000000003526f0 Call Trace: virtio_transport_stream_enqueue net/vmw_vsock/virtio_transport_common.c:1113 [inline] virtio_transport_seqpacket_enqueue+0x143/0x1c0 net/vmw_vsock/virtio_transport_common.c:841 vsock_connectible_sendmsg+0xabf/0x1040 net/vmw_vsock/af_vsock.c:2158 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:746 ____sys_sendmsg+0x52d/0x870 net/socket.c:2634 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2688 __sys_sendmmsg+0x227/0x430 net/socket.c:2777 __do_sys_sendmmsg net/socket.c:2804 [inline] __se_sys_sendmmsg net/socket.c:2801 [inline] __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2801 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1e5218f749 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:00007fffbe398ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f1e523e5fa0 RCX: 00007f1e5218f749 RDX: 0000000000000001 RSI: 0000200000000100 RDI: 0000000000000004 RBP: 00007f1e52213f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000024008094 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1e523e5fa0 R14: 00007f1e523e5fa0 R15: 0000000000000004 --- 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