* [ammarfaizi2-block:stable/linux-stable-rc/queue/5.4 15/15] kernel/bpf/core.c:1570:3: error: implicit declaration of function 'barrier_nospec'
@ 2023-02-23 13:31 kernel test robot
2023-02-23 13:49 ` Ammar Faizi
0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2023-02-23 13:31 UTC (permalink / raw)
To: Dave Hansen
Cc: llvm, oe-kbuild-all, Ammar Faizi, GNU/Weeb Mailing List,
Sasha Levin, Thomas Gleixner, Greg Kroah-Hartman
tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.4
head: b557ab7cf7793e05e0ab6c833a73b26bec189956
commit: 3bb990ea37595b41a1f06a551e5dd35372ea404a [15/15] uaccess: Add speculation barrier to copy_from_user()
config: mips-randconfig-r036-20230222 (https://download.01.org/0day-ci/archive/20230223/[email protected]/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install mips cross compiling tool for clang build
# apt-get install binutils-mipsel-linux-gnu
# https://github.com/ammarfaizi2/linux-block/commit/3bb990ea37595b41a1f06a551e5dd35372ea404a
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block stable/linux-stable-rc/queue/5.4
git checkout 3bb990ea37595b41a1f06a551e5dd35372ea404a
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash kernel/bpf/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <[email protected]>
| Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/
All errors (new ones prefixed by >>):
>> kernel/bpf/core.c:1570:3: error: implicit declaration of function 'barrier_nospec' [-Werror,-Wimplicit-function-declaration]
barrier_nospec();
^
1 error generated.
vim +/barrier_nospec +1570 kernel/bpf/core.c
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1326
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1327 select_insn:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1328 goto *jumptable[insn->code];
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1329
e217aadc9b5574 Daniel Borkmann 2021-06-16 1330 /* Explicitly mask the register-based shift amounts with 63 or 31
e217aadc9b5574 Daniel Borkmann 2021-06-16 1331 * to avoid undefined behavior. Normally this won't affect the
e217aadc9b5574 Daniel Borkmann 2021-06-16 1332 * generated code, for example, in case of native 64 bit archs such
e217aadc9b5574 Daniel Borkmann 2021-06-16 1333 * as x86-64 or arm64, the compiler is optimizing the AND away for
e217aadc9b5574 Daniel Borkmann 2021-06-16 1334 * the interpreter. In case of JITs, each of the JIT backends compiles
e217aadc9b5574 Daniel Borkmann 2021-06-16 1335 * the BPF shift operations to machine instructions which produce
e217aadc9b5574 Daniel Borkmann 2021-06-16 1336 * implementation-defined results in such a case; the resulting
e217aadc9b5574 Daniel Borkmann 2021-06-16 1337 * contents of the register may be arbitrary, but program behaviour
e217aadc9b5574 Daniel Borkmann 2021-06-16 1338 * as a whole remains defined. In other words, in case of JIT backends,
e217aadc9b5574 Daniel Borkmann 2021-06-16 1339 * the AND must /not/ be added to the emitted LSH/RSH/ARSH translation.
e217aadc9b5574 Daniel Borkmann 2021-06-16 1340 */
e217aadc9b5574 Daniel Borkmann 2021-06-16 1341 /* ALU (shifts) */
e217aadc9b5574 Daniel Borkmann 2021-06-16 1342 #define SHT(OPCODE, OP) \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1343 ALU64_##OPCODE##_X: \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1344 DST = DST OP (SRC & 63); \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1345 CONT; \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1346 ALU_##OPCODE##_X: \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1347 DST = (u32) DST OP ((u32) SRC & 31); \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1348 CONT; \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1349 ALU64_##OPCODE##_K: \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1350 DST = DST OP IMM; \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1351 CONT; \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1352 ALU_##OPCODE##_K: \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1353 DST = (u32) DST OP (u32) IMM; \
e217aadc9b5574 Daniel Borkmann 2021-06-16 1354 CONT;
e217aadc9b5574 Daniel Borkmann 2021-06-16 1355 /* ALU (rest) */
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1356 #define ALU(OPCODE, OP) \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1357 ALU64_##OPCODE##_X: \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1358 DST = DST OP SRC; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1359 CONT; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1360 ALU_##OPCODE##_X: \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1361 DST = (u32) DST OP (u32) SRC; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1362 CONT; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1363 ALU64_##OPCODE##_K: \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1364 DST = DST OP IMM; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1365 CONT; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1366 ALU_##OPCODE##_K: \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1367 DST = (u32) DST OP (u32) IMM; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1368 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1369 ALU(ADD, +)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1370 ALU(SUB, -)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1371 ALU(AND, &)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1372 ALU(OR, |)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1373 ALU(XOR, ^)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1374 ALU(MUL, *)
e217aadc9b5574 Daniel Borkmann 2021-06-16 1375 SHT(LSH, <<)
e217aadc9b5574 Daniel Borkmann 2021-06-16 1376 SHT(RSH, >>)
e217aadc9b5574 Daniel Borkmann 2021-06-16 1377 #undef SHT
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1378 #undef ALU
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1379 ALU_NEG:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1380 DST = (u32) -DST;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1381 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1382 ALU64_NEG:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1383 DST = -DST;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1384 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1385 ALU_MOV_X:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1386 DST = (u32) SRC;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1387 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1388 ALU_MOV_K:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1389 DST = (u32) IMM;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1390 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1391 ALU64_MOV_X:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1392 DST = SRC;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1393 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1394 ALU64_MOV_K:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1395 DST = IMM;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1396 CONT;
02ab695bb37ee9 Alexei Starovoitov 2014-09-04 1397 LD_IMM_DW:
02ab695bb37ee9 Alexei Starovoitov 2014-09-04 1398 DST = (u64) (u32) insn[0].imm | ((u64) (u32) insn[1].imm) << 32;
02ab695bb37ee9 Alexei Starovoitov 2014-09-04 1399 insn++;
02ab695bb37ee9 Alexei Starovoitov 2014-09-04 1400 CONT;
2dc6b100f928aa Jiong Wang 2018-12-05 1401 ALU_ARSH_X:
e217aadc9b5574 Daniel Borkmann 2021-06-16 1402 DST = (u64) (u32) (((s32) DST) >> (SRC & 31));
2dc6b100f928aa Jiong Wang 2018-12-05 1403 CONT;
2dc6b100f928aa Jiong Wang 2018-12-05 1404 ALU_ARSH_K:
75672dda27bd00 Jiong Wang 2019-06-25 1405 DST = (u64) (u32) (((s32) DST) >> IMM);
2dc6b100f928aa Jiong Wang 2018-12-05 1406 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1407 ALU64_ARSH_X:
e217aadc9b5574 Daniel Borkmann 2021-06-16 1408 (*(s64 *) &DST) >>= (SRC & 63);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1409 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1410 ALU64_ARSH_K:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1411 (*(s64 *) &DST) >>= IMM;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1412 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1413 ALU64_MOD_X:
144cd91c4c2bce Daniel Borkmann 2019-01-03 1414 div64_u64_rem(DST, SRC, &AX);
144cd91c4c2bce Daniel Borkmann 2019-01-03 1415 DST = AX;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1416 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1417 ALU_MOD_X:
144cd91c4c2bce Daniel Borkmann 2019-01-03 1418 AX = (u32) DST;
144cd91c4c2bce Daniel Borkmann 2019-01-03 1419 DST = do_div(AX, (u32) SRC);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1420 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1421 ALU64_MOD_K:
144cd91c4c2bce Daniel Borkmann 2019-01-03 1422 div64_u64_rem(DST, IMM, &AX);
144cd91c4c2bce Daniel Borkmann 2019-01-03 1423 DST = AX;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1424 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1425 ALU_MOD_K:
144cd91c4c2bce Daniel Borkmann 2019-01-03 1426 AX = (u32) DST;
144cd91c4c2bce Daniel Borkmann 2019-01-03 1427 DST = do_div(AX, (u32) IMM);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1428 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1429 ALU64_DIV_X:
876a7ae65b86d8 Alexei Starovoitov 2015-04-27 1430 DST = div64_u64(DST, SRC);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1431 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1432 ALU_DIV_X:
144cd91c4c2bce Daniel Borkmann 2019-01-03 1433 AX = (u32) DST;
144cd91c4c2bce Daniel Borkmann 2019-01-03 1434 do_div(AX, (u32) SRC);
144cd91c4c2bce Daniel Borkmann 2019-01-03 1435 DST = (u32) AX;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1436 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1437 ALU64_DIV_K:
876a7ae65b86d8 Alexei Starovoitov 2015-04-27 1438 DST = div64_u64(DST, IMM);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1439 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1440 ALU_DIV_K:
144cd91c4c2bce Daniel Borkmann 2019-01-03 1441 AX = (u32) DST;
144cd91c4c2bce Daniel Borkmann 2019-01-03 1442 do_div(AX, (u32) IMM);
144cd91c4c2bce Daniel Borkmann 2019-01-03 1443 DST = (u32) AX;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1444 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1445 ALU_END_TO_BE:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1446 switch (IMM) {
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1447 case 16:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1448 DST = (__force u16) cpu_to_be16(DST);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1449 break;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1450 case 32:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1451 DST = (__force u32) cpu_to_be32(DST);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1452 break;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1453 case 64:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1454 DST = (__force u64) cpu_to_be64(DST);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1455 break;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1456 }
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1457 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1458 ALU_END_TO_LE:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1459 switch (IMM) {
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1460 case 16:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1461 DST = (__force u16) cpu_to_le16(DST);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1462 break;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1463 case 32:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1464 DST = (__force u32) cpu_to_le32(DST);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1465 break;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1466 case 64:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1467 DST = (__force u64) cpu_to_le64(DST);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1468 break;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1469 }
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1470 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1471
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1472 /* CALL */
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1473 JMP_CALL:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1474 /* Function call scratches BPF_R1-BPF_R5 registers,
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1475 * preserves BPF_R6-BPF_R9, and stores return value
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1476 * into BPF_R0.
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1477 */
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1478 BPF_R0 = (__bpf_call_base + insn->imm)(BPF_R1, BPF_R2, BPF_R3,
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1479 BPF_R4, BPF_R5);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1480 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1481
1ea47e01ad6ea0 Alexei Starovoitov 2017-12-14 1482 JMP_CALL_ARGS:
1ea47e01ad6ea0 Alexei Starovoitov 2017-12-14 1483 BPF_R0 = (__bpf_call_base_args + insn->imm)(BPF_R1, BPF_R2,
1ea47e01ad6ea0 Alexei Starovoitov 2017-12-14 1484 BPF_R3, BPF_R4,
1ea47e01ad6ea0 Alexei Starovoitov 2017-12-14 1485 BPF_R5,
1ea47e01ad6ea0 Alexei Starovoitov 2017-12-14 1486 insn + insn->off + 1);
1ea47e01ad6ea0 Alexei Starovoitov 2017-12-14 1487 CONT;
1ea47e01ad6ea0 Alexei Starovoitov 2017-12-14 1488
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1489 JMP_TAIL_CALL: {
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1490 struct bpf_map *map = (struct bpf_map *) (unsigned long) BPF_R2;
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1491 struct bpf_array *array = container_of(map, struct bpf_array, map);
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1492 struct bpf_prog *prog;
90caccdd8cc021 Alexei Starovoitov 2017-10-03 1493 u32 index = BPF_R3;
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1494
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1495 if (unlikely(index >= array->map.max_entries))
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1496 goto out;
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1497 if (unlikely(tail_call_cnt > MAX_TAIL_CALL_CNT))
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1498 goto out;
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1499
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1500 tail_call_cnt++;
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1501
2a36f0b92eb638 Wang Nan 2015-08-06 1502 prog = READ_ONCE(array->ptrs[index]);
1ca1cc98bf7418 Daniel Borkmann 2016-06-28 1503 if (!prog)
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1504 goto out;
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1505
c4675f935399cb Daniel Borkmann 2015-07-13 1506 /* ARG1 at this point is guaranteed to point to CTX from
c4675f935399cb Daniel Borkmann 2015-07-13 1507 * the verifier side due to the fact that the tail call is
c4675f935399cb Daniel Borkmann 2015-07-13 1508 * handeled like a helper, that is, bpf_tail_call_proto,
c4675f935399cb Daniel Borkmann 2015-07-13 1509 * where arg1_type is ARG_PTR_TO_CTX.
c4675f935399cb Daniel Borkmann 2015-07-13 1510 */
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1511 insn = prog->insnsi;
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1512 goto select_insn;
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1513 out:
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1514 CONT;
04fd61ab36ec06 Alexei Starovoitov 2015-05-19 1515 }
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1516 JMP_JA:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1517 insn += insn->off;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1518 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1519 JMP_EXIT:
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1520 return BPF_R0;
503a8865a47752 Jiong Wang 2019-01-26 1521 /* JMP */
503a8865a47752 Jiong Wang 2019-01-26 1522 #define COND_JMP(SIGN, OPCODE, CMP_OP) \
503a8865a47752 Jiong Wang 2019-01-26 1523 JMP_##OPCODE##_X: \
503a8865a47752 Jiong Wang 2019-01-26 1524 if ((SIGN##64) DST CMP_OP (SIGN##64) SRC) { \
503a8865a47752 Jiong Wang 2019-01-26 1525 insn += insn->off; \
503a8865a47752 Jiong Wang 2019-01-26 1526 CONT_JMP; \
503a8865a47752 Jiong Wang 2019-01-26 1527 } \
503a8865a47752 Jiong Wang 2019-01-26 1528 CONT; \
503a8865a47752 Jiong Wang 2019-01-26 1529 JMP32_##OPCODE##_X: \
503a8865a47752 Jiong Wang 2019-01-26 1530 if ((SIGN##32) DST CMP_OP (SIGN##32) SRC) { \
503a8865a47752 Jiong Wang 2019-01-26 1531 insn += insn->off; \
503a8865a47752 Jiong Wang 2019-01-26 1532 CONT_JMP; \
503a8865a47752 Jiong Wang 2019-01-26 1533 } \
503a8865a47752 Jiong Wang 2019-01-26 1534 CONT; \
503a8865a47752 Jiong Wang 2019-01-26 1535 JMP_##OPCODE##_K: \
503a8865a47752 Jiong Wang 2019-01-26 1536 if ((SIGN##64) DST CMP_OP (SIGN##64) IMM) { \
503a8865a47752 Jiong Wang 2019-01-26 1537 insn += insn->off; \
503a8865a47752 Jiong Wang 2019-01-26 1538 CONT_JMP; \
503a8865a47752 Jiong Wang 2019-01-26 1539 } \
503a8865a47752 Jiong Wang 2019-01-26 1540 CONT; \
503a8865a47752 Jiong Wang 2019-01-26 1541 JMP32_##OPCODE##_K: \
503a8865a47752 Jiong Wang 2019-01-26 1542 if ((SIGN##32) DST CMP_OP (SIGN##32) IMM) { \
503a8865a47752 Jiong Wang 2019-01-26 1543 insn += insn->off; \
503a8865a47752 Jiong Wang 2019-01-26 1544 CONT_JMP; \
503a8865a47752 Jiong Wang 2019-01-26 1545 } \
503a8865a47752 Jiong Wang 2019-01-26 1546 CONT;
503a8865a47752 Jiong Wang 2019-01-26 1547 COND_JMP(u, JEQ, ==)
503a8865a47752 Jiong Wang 2019-01-26 1548 COND_JMP(u, JNE, !=)
503a8865a47752 Jiong Wang 2019-01-26 1549 COND_JMP(u, JGT, >)
503a8865a47752 Jiong Wang 2019-01-26 1550 COND_JMP(u, JLT, <)
503a8865a47752 Jiong Wang 2019-01-26 1551 COND_JMP(u, JGE, >=)
503a8865a47752 Jiong Wang 2019-01-26 1552 COND_JMP(u, JLE, <=)
503a8865a47752 Jiong Wang 2019-01-26 1553 COND_JMP(u, JSET, &)
503a8865a47752 Jiong Wang 2019-01-26 1554 COND_JMP(s, JSGT, >)
503a8865a47752 Jiong Wang 2019-01-26 1555 COND_JMP(s, JSLT, <)
503a8865a47752 Jiong Wang 2019-01-26 1556 COND_JMP(s, JSGE, >=)
503a8865a47752 Jiong Wang 2019-01-26 1557 COND_JMP(s, JSLE, <=)
503a8865a47752 Jiong Wang 2019-01-26 1558 #undef COND_JMP
e80c3533c354ed Daniel Borkmann 2021-09-07 1559 /* ST, STX and LDX*/
e80c3533c354ed Daniel Borkmann 2021-09-07 1560 ST_NOSPEC:
e80c3533c354ed Daniel Borkmann 2021-09-07 1561 /* Speculation barrier for mitigating Speculative Store Bypass.
e80c3533c354ed Daniel Borkmann 2021-09-07 1562 * In case of arm64, we rely on the firmware mitigation as
e80c3533c354ed Daniel Borkmann 2021-09-07 1563 * controlled via the ssbd kernel parameter. Whenever the
e80c3533c354ed Daniel Borkmann 2021-09-07 1564 * mitigation is enabled, it works for all of the kernel code
e80c3533c354ed Daniel Borkmann 2021-09-07 1565 * with no need to provide any additional instructions here.
e80c3533c354ed Daniel Borkmann 2021-09-07 1566 * In case of x86, we use 'lfence' insn for mitigation. We
e80c3533c354ed Daniel Borkmann 2021-09-07 1567 * reuse preexisting logic from Spectre v1 mitigation that
e80c3533c354ed Daniel Borkmann 2021-09-07 1568 * happens to produce the required code on x86 for v4 as well.
e80c3533c354ed Daniel Borkmann 2021-09-07 1569 */
e80c3533c354ed Daniel Borkmann 2021-09-07 @1570 barrier_nospec();
e80c3533c354ed Daniel Borkmann 2021-09-07 1571 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1572 #define LDST(SIZEOP, SIZE) \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1573 STX_MEM_##SIZEOP: \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1574 *(SIZE *)(unsigned long) (DST + insn->off) = SRC; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1575 CONT; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1576 ST_MEM_##SIZEOP: \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1577 *(SIZE *)(unsigned long) (DST + insn->off) = IMM; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1578 CONT; \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1579 LDX_MEM_##SIZEOP: \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1580 DST = *(SIZE *)(unsigned long) (SRC + insn->off); \
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1581 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1582
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1583 LDST(B, u8)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1584 LDST(H, u16)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1585 LDST(W, u32)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1586 LDST(DW, u64)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1587 #undef LDST
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1588 STX_XADD_W: /* lock xadd *(u32 *)(dst_reg + off16) += src_reg */
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1589 atomic_add((u32) SRC, (atomic_t *)(unsigned long)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1590 (DST + insn->off));
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1591 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1592 STX_XADD_DW: /* lock xadd *(u64 *)(dst_reg + off16) += src_reg */
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1593 atomic64_add((u64) SRC, (atomic64_t *)(unsigned long)
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1594 (DST + insn->off));
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1595 CONT;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1596
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1597 default_label:
5e581dad4fec0e Daniel Borkmann 2018-01-26 1598 /* If we ever reach this, we have a bug somewhere. Die hard here
5e581dad4fec0e Daniel Borkmann 2018-01-26 1599 * instead of just returning 0; we could be somewhere in a subprog,
5e581dad4fec0e Daniel Borkmann 2018-01-26 1600 * so execution could continue otherwise which we do /not/ want.
5e581dad4fec0e Daniel Borkmann 2018-01-26 1601 *
5e581dad4fec0e Daniel Borkmann 2018-01-26 1602 * Note, verifier whitelists all opcodes in bpf_opcode_in_insntable().
5e581dad4fec0e Daniel Borkmann 2018-01-26 1603 */
5e581dad4fec0e Daniel Borkmann 2018-01-26 1604 pr_warn("BPF interpreter: unknown opcode %02x\n", insn->code);
5e581dad4fec0e Daniel Borkmann 2018-01-26 1605 BUG_ON(1);
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1606 return 0;
f5bffecda951b5 Alexei Starovoitov 2014-07-22 1607 }
f696b8f471ec98 Alexei Starovoitov 2017-05-30 1608
:::::: The code at line 1570 was first introduced by commit
:::::: e80c3533c354ede56146ab0e4fbb8304d0c1209f bpf: Introduce BPF nospec instruction for mitigating Spectre v4
:::::: TO: Daniel Borkmann <[email protected]>
:::::: CC: Greg Kroah-Hartman <[email protected]>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [ammarfaizi2-block:stable/linux-stable-rc/queue/5.4 15/15] kernel/bpf/core.c:1570:3: error: implicit declaration of function 'barrier_nospec'
2023-02-23 13:31 [ammarfaizi2-block:stable/linux-stable-rc/queue/5.4 15/15] kernel/bpf/core.c:1570:3: error: implicit declaration of function 'barrier_nospec' kernel test robot
@ 2023-02-23 13:49 ` Ammar Faizi
2023-02-23 14:14 ` Greg Kroah-Hartman
0 siblings, 1 reply; 3+ messages in thread
From: Ammar Faizi @ 2023-02-23 13:49 UTC (permalink / raw)
To: kernel test robot
Cc: Dave Hansen, llvm, oe-kbuild-all, GNU/Weeb Mailing List,
Sasha Levin, Thomas Gleixner, Greg Kroah-Hartman
On Thu, Feb 23, 2023 at 09:31:08PM +0800, kernel test robot wrote:
> tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.4
> commit: 3bb990ea37595b41a1f06a551e5dd35372ea404a [15/15] uaccess: Add speculation barrier to copy_from_user()
...
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <[email protected]>
> | Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/
>
> All errors (new ones prefixed by >>):
>
> >> kernel/bpf/core.c:1570:3: error: implicit declaration of function 'barrier_nospec' [-Werror,-Wimplicit-function-declaration]
> barrier_nospec();
> ^
> 1 error generated.
It's missing #include <linux/nospec.h>. The fix for this is:
Upstream f3dd0c53370e70c0f9b7e931bbec12916f3bb8cc ("bpf: add missing header file include")
That one needs to get backported too. Or just fold that in to maintain
the bisectability (for stable kernels).
Thanks,
--
Ammar Faizi
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [ammarfaizi2-block:stable/linux-stable-rc/queue/5.4 15/15] kernel/bpf/core.c:1570:3: error: implicit declaration of function 'barrier_nospec'
2023-02-23 13:49 ` Ammar Faizi
@ 2023-02-23 14:14 ` Greg Kroah-Hartman
0 siblings, 0 replies; 3+ messages in thread
From: Greg Kroah-Hartman @ 2023-02-23 14:14 UTC (permalink / raw)
To: Ammar Faizi
Cc: kernel test robot, Dave Hansen, llvm, oe-kbuild-all,
GNU/Weeb Mailing List, Sasha Levin, Thomas Gleixner
On Thu, Feb 23, 2023 at 08:49:02PM +0700, Ammar Faizi wrote:
> On Thu, Feb 23, 2023 at 09:31:08PM +0800, kernel test robot wrote:
> > tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.4
> > commit: 3bb990ea37595b41a1f06a551e5dd35372ea404a [15/15] uaccess: Add speculation barrier to copy_from_user()
> ...
> > If you fix the issue, kindly add following tag where applicable
> > | Reported-by: kernel test robot <[email protected]>
> > | Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/
> >
> > All errors (new ones prefixed by >>):
> >
> > >> kernel/bpf/core.c:1570:3: error: implicit declaration of function 'barrier_nospec' [-Werror,-Wimplicit-function-declaration]
> > barrier_nospec();
> > ^
> > 1 error generated.
>
> It's missing #include <linux/nospec.h>. The fix for this is:
>
> Upstream f3dd0c53370e70c0f9b7e931bbec12916f3bb8cc ("bpf: add missing header file include")
>
> That one needs to get backported too. Or just fold that in to maintain
> the bisectability (for stable kernels).
Thanks, now queued up, I missed that follow-on patch.
greg k-h
^ permalink raw reply [flat|nested] 3+ messages in thread
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2023-02-23 13:31 [ammarfaizi2-block:stable/linux-stable-rc/queue/5.4 15/15] kernel/bpf/core.c:1570:3: error: implicit declaration of function 'barrier_nospec' kernel test robot
2023-02-23 13:49 ` Ammar Faizi
2023-02-23 14:14 ` Greg Kroah-Hartman
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