Hi Roberto, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on bpf-next/master] [also build test WARNING on bpf/master horms-ipvs/master net/master net-next/master v5.18 next-20220525] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/intel-lab-lkp/linux/commits/Roberto-Sassu/bpf-Add-support-for-maps-with-authenticated-values/20220525-212552 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: x86_64-rhel-8.3-kselftests (https://download.01.org/0day-ci/archive/20220526/202205260606.VXzztn2R-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-1) 11.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-14-g5a0004b5-dirty # https://github.com/intel-lab-lkp/linux/commit/196e68e5ddfa50f40efaf20c8df37f3420e38b72 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Roberto-Sassu/bpf-Add-support-for-maps-with-authenticated-values/20220525-212552 git checkout 196e68e5ddfa50f40efaf20c8df37f3420e38b72 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/bpf/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) kernel/bpf/syscall.c:590:25: sparse: sparse: Using plain integer as NULL pointer >> kernel/bpf/syscall.c:1386:19: sparse: sparse: cast to restricted __be32 kernel/bpf/syscall.c: note: in included file (through include/linux/bpf.h): include/linux/bpfptr.h:52:47: sparse: sparse: cast to non-scalar include/linux/bpfptr.h:52:47: sparse: sparse: cast from non-scalar include/linux/bpfptr.h:52:47: sparse: sparse: cast to non-scalar include/linux/bpfptr.h:52:47: sparse: sparse: cast from non-scalar include/linux/bpfptr.h:81:43: sparse: sparse: cast to non-scalar include/linux/bpfptr.h:81:43: sparse: sparse: cast from non-scalar include/linux/bpfptr.h:52:47: sparse: sparse: cast to non-scalar include/linux/bpfptr.h:52:47: sparse: sparse: cast from non-scalar include/linux/bpfptr.h:52:47: sparse: sparse: cast to non-scalar include/linux/bpfptr.h:52:47: sparse: sparse: cast from non-scalar vim +1386 kernel/bpf/syscall.c 1369 1370 int bpf_map_verify_value_sig(const void *mod, size_t modlen, bool verify) 1371 { 1372 const size_t marker_len = strlen(MODULE_SIG_STRING); 1373 struct module_signature ms; 1374 size_t sig_len; 1375 u32 _modlen; 1376 int ret; 1377 1378 /* 1379 * Format of mod: 1380 * 1381 * verified data+sig size (be32), verified data, sig, unverified data 1382 */ 1383 if (modlen <= sizeof(u32)) 1384 return -ENOENT; 1385 > 1386 _modlen = be32_to_cpu(*(u32 *)(mod)); 1387 1388 if (_modlen > modlen - sizeof(u32)) 1389 return -EINVAL; 1390 1391 modlen = _modlen; 1392 mod += sizeof(u32); 1393 1394 if (modlen <= marker_len) 1395 return -ENOENT; 1396 1397 if (memcmp(mod + modlen - marker_len, MODULE_SIG_STRING, marker_len)) 1398 return -ENOENT; 1399 1400 modlen -= marker_len; 1401 1402 if (modlen <= sizeof(ms)) 1403 return -EBADMSG; 1404 1405 memcpy(&ms, mod + (modlen - sizeof(ms)), sizeof(ms)); 1406 1407 ret = mod_check_sig(&ms, modlen, "bpf_map_value"); 1408 if (ret) 1409 return ret; 1410 1411 sig_len = be32_to_cpu(ms.sig_len); 1412 modlen -= sig_len + sizeof(ms); 1413 1414 if (verify) { 1415 ret = verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len, 1416 VERIFY_USE_SECONDARY_KEYRING, 1417 VERIFYING_UNSPECIFIED_SIGNATURE, 1418 NULL, NULL); 1419 if (ret < 0) 1420 return ret; 1421 } 1422 1423 return modlen; 1424 } 1425 EXPORT_SYMBOL_GPL(bpf_map_verify_value_sig); 1426 -- 0-DAY CI Kernel Test Service https://01.org/lkp
