[缺陷描述]： kernel-selftests下新增失败用例bpf.test_sockmap，报错send loop error:: Permission denied 该用例首次失败是在9月13日晚上触发的nightly,之前一直都是成功的 失败用例nightly链接：https://tone.aliyun-inc.com/ws/6yddz4ne/test_result/223923 测试日志： # ./test_sockmap libbpf: Error loading ELF section .BTF: -22. Ignored and continue. [TEST 0]: (1, 1, 1, sendmsg, pass,): PASS [TEST 1]: (1, 1, 1, sendpage, pass,): PASS [TEST 2]: (1, 1, 34, sendmsg, pass,): PASS [TEST 3]: (1, 1, 34, sendpage, pass,): PASS [TEST 4]: (1, 1, 67, sendmsg, pass,): PASS ====================省略部分======================================= [TEST 227]: (100, 1, 5, sendpage, redir,apply 4096,cork 4096,): PASS [TEST 228]: (1, 1, 1, sendmsg, pass,redir,start 1,end 2,pop (1,2),): send loop error:: Permission denied msg_loop_tx: iov_count 1 iov_buf 1 cnt 1 err 13 tx thread exited with err 1. FAILED Summary: 228 PASSED 1 FAILED 复现环境： anck 4.19 x86物理机 复现概率： 必现 内核信息： # uname -r 4.19.91-847.git.ea3366bc0d.an8.x86_64 操作系统信息： # cat /etc/os-release NAME="Anolis OS" VERSION="8.8" ID="anolis" ID_LIKE="rhel fedora centos" VERSION_ID="8.8" PLATFORM_ID="platform:an8" PRETTY_NAME="Anolis OS 8.8" ANSI_COLOR="0;31" HOME_URL="https://openanolis.cn/" cpu信息： # lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 96 On-line CPU(s) list: 0-95 Thread(s) per core: 2 Core(s) per socket: 24 Socket(s): 2 NUMA node(s): 1 Vendor ID: GenuineIntel BIOS Vendor ID: Intel(R) Corporation CPU family: 6 Model: 85 Model name: Intel(R) Xeon(R) Platinum 8163 CPU @ 2.50GHz BIOS Model name: Intel(R) Xeon(R) Platinum 8163 CPU @ 2.50GHz Stepping: 4 CPU MHz: 1000.735 CPU max MHz: 3100.0000 CPU min MHz: 1000.0000 BogoMIPS: 5000.00 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 1024K L3 cache: 33792K NUMA node0 CPU(s): 0-95 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 invpcid_single pti intel_ppin ssbd mba ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm mpx rdt_a avx512f avx512dq rdseed adx smap clflushopt clwb intel_pt avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts pku ospke md_clear flush_l1d arch_capabilities 内存信息： # free -h total used free shared buff/cache available Mem: 755Gi 3.6Gi 744Gi 18Mi 6.5Gi 747Gi Swap: 2.0Gi 0B 2.0Gi [复现步骤]： 测试用例代码路径： tools/testing/selftests/bpf/test_sockmap.c 手动执行步骤： 下载当前内核对应的kernel源码包 rpm -ivh xxx.src.rpm 默认安装到/root下 yum-builddep -y rpmbuild/SPECS/kernel.spec 自动安装前置依赖包，需要yum-utils rpmbuild -bp ./rpmbuild/SPECS/kernel.spec # 这个步骤会打相关的patch， 解压缩tar包，生成BUILD目录 cd rpmbuild/BUILD/kernel-xxx/linux-xxx/ 接下来就可以编译测试了 cd ./tools/testing/selftests/bpf/ make 执行测试用例 ./test_sockmap [期望结果]： 用例pass [实际结果]： 用例执行失败，报错send loop error:: Permission denied [分析] test_sockmap用例失败疑似和9月13日上午合入的下面PR有关，请开发同学确认下 https://gitee.com/anolis/cloud-kernel/pulls/2120