网络领域 kselftest 失败用例修复

**【缺陷描述】：请补充详细的缺陷问题现象描述**
```
TESTCASE CMDLINE:kernel_selftests_6.6_t/kselftest-6.6-bridge_brouter.sh cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh
case=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   case_start=2025-06-03 23:17:12
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 0
PASS: netns connectivity: ns1 and ns2 can reach each other
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 1
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 2
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 3
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 4
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 5
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 6
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 7
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 8
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 9
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 10
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 11
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 12
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 13
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 14
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 15
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 16
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 17
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 18
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 19
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 20
cmd=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   testing... 21
ERROR: ping did not work, but it should (broute+forward)
case=cd kernel_test_bin/bin;export PATH=$(pwd)/../lib:$PATH; cd kernel_selftests_6.6_t/testcases/bin; export PATH=$(pwd):$PATH; cd netfilter; ./bridge_brouter.sh   test_start=2025-06-03 23:17:12 test_end=2025-06-03 23:17:34 test_duration=22s
BUG: testcase [ kernel_selftests_6.6_t/kselftest-6.6-bridge_brouter.sh ] test fail
```

**一、缺陷信息**

**【缺陷所属的os版本】（如openEuler-22.03-LTS，参考命令"cat /etc/os-release"结果）**

**【内核版本】（如kernel-5.10.0-60.138.0.165，参考命令"uname -r"结果）**

**【缺陷所属软件及版本号】（如kernel-5.10.0-60.138.0.165，参考命令"rpm -q 包名"结果）**

**【环境信息】**
硬件信息

- 提供跟硬件相关的信息，如架构、cpu和内存规格等
- 虚拟机场景，额外补充宿主机os版本类型

软件信息

- 跟缺陷所属软件相关的其它软件版本信息（如软件包构建失败由gcc引起，请填写gcc的版本号）

网络信息

- 如果有特殊组网，请提供网络拓扑信息以及网络数据走向

**【问题复现步骤】：请描述具体的操作步骤**

**【实际结果】**，请描述出问题的结果和影响
**【期望结果】**，请描述出期望的结果和影响
**【其他相关附件信息】**
比如系统message日志/组件日志、dump信息、图片等

**【缺陷详情及分析指导参考链接】**

**二、缺陷分析结构反馈**
影响性分析说明：

缺陷严重等级:(Critical/High/Moderate/Low)

缺陷根因说明:

受影响版本排查(受影响/不受影响):
openEuler-20.03-LTS-SP4
openEuler-22.03-LTS-SP3
openEuler-22.03-LTS-SP4
openEuler-24.03-LTS
openEuler-24.03-LTS-SP1

修复是否涉及abi变化(是/否):
openEuler-20.03-LTS-SP4
openEuler-22.03-LTS-SP3
openEuler-22.03-LTS-SP4
openEuler-24.03-LTS
openEuler-24.03-LTS-SP1

src-openEuler/kernel

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