tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/fprobe_link_5 head: 9149abfa25286fdf715525babec5150939c9ac96 commit: 32adbf1760d4cccb9702863371d50b625ae7ee1d [3/10] bpf: Add support to attach kprobe program with fprobe config: i386-randconfig-c021 (https://download.01.org/0day-ci/archive/20220214/202202140713.Pklmh3QR-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id... git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git git fetch --no-tags jolsa-perf bpf/fprobe_link_5 git checkout 32adbf1760d4cccb9702863371d50b625ae7ee1d # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: kernel/bpf/syscall.o: in function `link_create': vim +4337 kernel/bpf/syscall.c 4258 4259 #define BPF_LINK_CREATE_LAST_FIELD link_create.fprobe.flags 4260 static int link_create(union bpf_attr *attr, bpfptr_t uattr) 4261 { 4262 enum bpf_prog_type ptype; 4263 struct bpf_prog *prog; 4264 int ret; 4265 4266 if (CHECK_ATTR(BPF_LINK_CREATE)) 4267 return -EINVAL; 4268 4269 prog = bpf_prog_get(attr->link_create.prog_fd); 4270 if (IS_ERR(prog)) 4271 return PTR_ERR(prog); 4272 4273 ret = bpf_prog_attach_check_attach_type(prog, 4274 attr->link_create.attach_type); 4275 if (ret) 4276 goto out; 4277 4278 switch (prog->type) { 4279 case BPF_PROG_TYPE_EXT: 4280 ret = tracing_bpf_link_attach(attr, uattr, prog); 4281 goto out; 4282 case BPF_PROG_TYPE_PERF_EVENT: 4283 case BPF_PROG_TYPE_TRACEPOINT: 4284 if (attr->link_create.attach_type != BPF_PERF_EVENT) { 4285 ret = -EINVAL; 4286 goto out; 4287 } 4288 ptype = prog->type; 4289 break; 4290 case BPF_PROG_TYPE_KPROBE: 4291 if (attr->link_create.attach_type != BPF_PERF_EVENT && 4292 attr->link_create.attach_type != BPF_TRACE_FPROBE) { 4293 ret = -EINVAL; 4294 goto out; 4295 } 4296 ptype = prog->type; 4297 break; 4298 default: 4299 ptype = attach_type_to_prog_type(attr->link_create.attach_type); 4300 if (ptype == BPF_PROG_TYPE_UNSPEC || ptype != prog->type) { 4301 ret = -EINVAL; 4302 goto out; 4303 } 4304 break; 4305 } 4306 4307 switch (ptype) { 4308 case BPF_PROG_TYPE_CGROUP_SKB: 4309 case BPF_PROG_TYPE_CGROUP_SOCK: 4310 case BPF_PROG_TYPE_CGROUP_SOCK_ADDR: 4311 case BPF_PROG_TYPE_SOCK_OPS: 4312 case BPF_PROG_TYPE_CGROUP_DEVICE: 4313 case BPF_PROG_TYPE_CGROUP_SYSCTL: 4314 case BPF_PROG_TYPE_CGROUP_SOCKOPT: 4315 ret = cgroup_bpf_link_attach(attr, prog); 4316 break; 4317 case BPF_PROG_TYPE_TRACING: 4318 ret = tracing_bpf_link_attach(attr, uattr, prog); 4319 break; 4320 case BPF_PROG_TYPE_FLOW_DISSECTOR: 4321 case BPF_PROG_TYPE_SK_LOOKUP: 4322 ret = netns_bpf_link_create(attr, prog); 4323 break; 4324 #ifdef CONFIG_NET 4325 case BPF_PROG_TYPE_XDP: 4326 ret = bpf_xdp_link_attach(attr, prog); 4327 break; 4328 #endif 4329 case BPF_PROG_TYPE_PERF_EVENT: 4330 case BPF_PROG_TYPE_TRACEPOINT: 4331 ret = bpf_perf_link_attach(attr, prog); 4332 break; 4333 case BPF_PROG_TYPE_KPROBE: 4334 if (attr->link_create.attach_type == BPF_PERF_EVENT) 4335 ret = bpf_perf_link_attach(attr, prog); 4336 else 4338 break; 4339 default: 4340 ret = -EINVAL; 4341 } 4342 4343 out: 4344 if (ret < 0) 4345 bpf_prog_put(prog); 4346 return ret; 4347 } 4348 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org