[DPDK/vhost/virtio Bug 1682] [dpdk-25.03] vhost_virtio_fuzzing/tso_forward_pkt: testpmd cannot exit normally when test fuzz

[bugzilla@dpdk.org]

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https://bugs.dpdk.org/show_bug.cgi?id=1682

            Bug ID: 1682
           Summary: [dpdk-25.03] vhost_virtio_fuzzing/tso_forward_pkt:
                    testpmd cannot exit normally when test fuzz
           Product: DPDK
           Version: 25.03
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: vhost/virtio
          Assignee: dev@dpdk.org
          Reporter: songx.jiale@intel.com
  Target Milestone: ---

Created attachment 305
  --> https://bugs.dpdk.org/attachment.cgi?id=305&action=edit
dpdk fuzz test file

Environment
===========
DPDK version: 5f37ee9c859f3ce08ca4364f1d8c0e70ec33ac83 version: 25.03.0-rc2
OS: Red Hat Enterprise Linux 9.4/5.14.0-427.13.1.el9_4.x86_64
Compiler: clang version 17.0.6
Hardware platform: Intel(R) Xeon(R) Gold 6139 CPU @ 2.30GHz
NIC hardware: N/A
NIC firmware: N/A

Test Setup
Steps to reproduce
==================
1. create packet file(If the environment already has these packets, can skip
this step)
mkdir -p /tmp/fuzz/vhost_pcap
python3 pkt.py

2. Compile dpdk and fuzz
tar zxf fuzz.tar.gz
cp -r fuzz /root/dpdk/app/ 
sed -i "s/'test-sad',/'test-sad',\n        'fuzz',/g" app/meson.build

rm -rf x86_64-native-linuxapp-clang
CC=clang meson --werror -Denable_kmods=True -Dbuildtype=debug -Db_lundef=false
-Db_sanitize=address x86_64-native-linuxapp-clang
ninja -C x86_64-native-linuxapp-clang

3. create vhost
rm -rf /tmp/sock0
x86_64-native-linuxapp-clang/app/dpdk-fuzz /tmp/fuzz/vhost_pcap/ --
-ignore_remaining_args=1 -l 1 -n 4  --file-prefix=vhost --vdev
'net_vhost0,iface=/tmp/sock0,queues=4' -- --rxq=4 --txq=4 --txd=1024 --rxd=1024 
RTE>>vhost_autotest

4. start testpmd with virtio device 
x86_64-native-linuxapp-clang/app/dpdk-testpmd -l 1,2 -n 4
--file-prefix=virtio_26049_20250311133724 --no-pci
--vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=/tmp/sock0,queues=4 -- -i
--rxq=4 --txq=4 --txd=1024 --rxd=1024

5. set csum fwd and start fwd
set fwd csum
start
show port stats all
note: Loop query the port status. when the bps of the port receiving and
transmitting packets is found to be 0, exit testpmd.

6. exit testpmd
quit

Results: 
========
Unable to exit testpmd, will get stuck.

Expected Result:
================
Testpmd receives and sends packets normally and exits normally.

bad commit:
===========
commit 76730c7b9b5a35d1a74d45a08153a03bdb1b26f8
Author: Jie Hai <haijie1@huawei.com>
Date:   Fri Feb 14 09:56:38 2025 +0800

    app/testpmd: use packet type parsing API

    1. Use rte_net_get_ptype() to parse packets instead.
    2. Support TSO for packets with IPv6 extension header.

    Signed-off-by: Jie Hai <haijie1@huawei.com>

 lib/vhost/fd_man.c | 439 +++++++++++++++++------------------------------------
 lib/vhost/fd_man.h |   5 +-
 2 files changed, 144 insertions, 300 deletions

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