tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 90ff3e07cc268a8e40bd578dcc4907a3db419c52 commit: 43be0c0544c8e70723951433fd2dae258fff3dff [2954/2954] bpf, arm64: Fix bpf trampoline instruction endianness config: arm64-randconfig-r133-20250610 (https://download.01.org/0day-ci/archive/20250611/202506112030.xet5A4D9-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.3.0 reproduce: (https://download.01.org/0day-ci/archive/20250611/202506112030.xet5A4D9-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202506112030.xet5A4D9-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) arch/arm64/net/bpf_jit_comp.c:1515:29: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int [usertype] * @@ got restricted __le32 [usertype] * @@ arch/arm64/net/bpf_jit_comp.c:1515:29: sparse: expected unsigned int [usertype] * arch/arm64/net/bpf_jit_comp.c:1515:29: sparse: got restricted __le32 [usertype] *

...

arch/arm64/net/bpf_jit_comp.c:1647:73: sparse: sparse: incorrect type in argument 5 (different base types) @@ expected unsigned int [usertype] **branches @@ got restricted __le32 [usertype] **[assigned] branches @@ arch/arm64/net/bpf_jit_comp.c:1647:73: sparse: expected unsigned int [usertype] **branches arch/arm64/net/bpf_jit_comp.c:1647:73: sparse: got restricted __le32 [usertype] **[assigned] branches

vim +1647 arch/arm64/net/bpf_jit_comp.c 2a5ab77af7f94d Xu Kuohai 2024-04-13 1496 2a5ab77af7f94d Xu Kuohai 2024-04-13 1497 static void invoke_bpf_mod_ret(struct jit_ctx *ctx, struct bpf_tramp_progs *tp, 2a5ab77af7f94d Xu Kuohai 2024-04-13 1498 int args_off, int retval_off, u32 **branches) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1499 { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1500 int i; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1501 2a5ab77af7f94d Xu Kuohai 2024-04-13 1502 /* The first fmod_ret program will receive a garbage return value. 2a5ab77af7f94d Xu Kuohai 2024-04-13 1503 * Set this to 0 to avoid confusing the program. 2a5ab77af7f94d Xu Kuohai 2024-04-13 1504 */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1505 emit(A64_STR64I(A64_ZR, A64_SP, retval_off), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1506 for (i = 0; i < tp->nr_progs; i++) { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1507 invoke_bpf_prog(ctx, tp->progs[i], args_off, retval_off, true); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1508 /* if (*(u64 *)(sp + retval_off) != 0) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1509 * goto do_fexit; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1510 */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1511 emit(A64_LDR64I(A64_R(10), A64_SP, retval_off), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1512 /* Save the location of branch, and generate a nop. 2a5ab77af7f94d Xu Kuohai 2024-04-13 1513 * This nop will be replaced with a cbnz later. 2a5ab77af7f94d Xu Kuohai 2024-04-13 1514 */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 @1515 branches[i] = ctx->image + ctx->idx; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1516 emit(A64_NOP, ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1517 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1518 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1519 2a5ab77af7f94d Xu Kuohai 2024-04-13 1520 static void save_args(struct jit_ctx *ctx, int args_off, int nargs) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1521 { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1522 int i; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1523 2a5ab77af7f94d Xu Kuohai 2024-04-13 1524 for (i = 0; i < nargs; i++) { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1525 emit(A64_STR64I(i, A64_SP, args_off), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1526 args_off += 8; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1527 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1528 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1529 2a5ab77af7f94d Xu Kuohai 2024-04-13 1530 static void restore_args(struct jit_ctx *ctx, int args_off, int nargs) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1531 { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1532 int i; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1533 2a5ab77af7f94d Xu Kuohai 2024-04-13 1534 for (i = 0; i < nargs; i++) { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1535 emit(A64_LDR64I(i, A64_SP, args_off), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1536 args_off += 8; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1537 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1538 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1539 2a5ab77af7f94d Xu Kuohai 2024-04-13 1540 /* Based on the x86's implementation of arch_prepare_bpf_trampoline(). 2a5ab77af7f94d Xu Kuohai 2024-04-13 1541 * 2a5ab77af7f94d Xu Kuohai 2024-04-13 1542 * bpf prog and function entry before bpf trampoline hooked: 2a5ab77af7f94d Xu Kuohai 2024-04-13 1543 * mov x9, lr 2a5ab77af7f94d Xu Kuohai 2024-04-13 1544 * nop 2a5ab77af7f94d Xu Kuohai 2024-04-13 1545 * 2a5ab77af7f94d Xu Kuohai 2024-04-13 1546 * bpf prog and function entry after bpf trampoline hooked: 2a5ab77af7f94d Xu Kuohai 2024-04-13 1547 * mov x9, lr 2a5ab77af7f94d Xu Kuohai 2024-04-13 1548 * bl <bpf_trampoline or plt> 2a5ab77af7f94d Xu Kuohai 2024-04-13 1549 * 2a5ab77af7f94d Xu Kuohai 2024-04-13 1550 */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1551 static int prepare_trampoline(struct jit_ctx *ctx, struct bpf_tramp_image *im, 2a5ab77af7f94d Xu Kuohai 2024-04-13 1552 struct bpf_tramp_progs *tprogs, void *orig_call, 2a5ab77af7f94d Xu Kuohai 2024-04-13 1553 int nargs, u32 flags) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1554 { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1555 int i; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1556 int stack_size; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1557 int retaddr_off; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1558 int regs_off; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1559 int retval_off; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1560 int args_off; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1561 struct bpf_tramp_progs *fentry = &tprogs[BPF_TRAMP_FENTRY]; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1562 struct bpf_tramp_progs *fexit = &tprogs[BPF_TRAMP_FEXIT]; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1563 struct bpf_tramp_progs *fmod_ret = &tprogs[BPF_TRAMP_MODIFY_RETURN]; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1564 bool save_ret; 43be0c0544c8e7 Xu Kuohai 2024-04-13 1565 __le32 **branches = NULL; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1566 2a5ab77af7f94d Xu Kuohai 2024-04-13 1567 /* trampoline stack layout: 2a5ab77af7f94d Xu Kuohai 2024-04-13 1568 * [ parent ip ] 2a5ab77af7f94d Xu Kuohai 2024-04-13 1569 * [ FP ] 2a5ab77af7f94d Xu Kuohai 2024-04-13 1570 * SP + retaddr_off [ self ip ] 2a5ab77af7f94d Xu Kuohai 2024-04-13 1571 * [ FP ] 2a5ab77af7f94d Xu Kuohai 2024-04-13 1572 * 2a5ab77af7f94d Xu Kuohai 2024-04-13 1573 * [ padding ] align SP to multiples of 16 2a5ab77af7f94d Xu Kuohai 2024-04-13 1574 * 2a5ab77af7f94d Xu Kuohai 2024-04-13 1575 * SP + regs_off [ x19 ] callee saved reg x19 2a5ab77af7f94d Xu Kuohai 2024-04-13 1576 * 2a5ab77af7f94d Xu Kuohai 2024-04-13 1577 * SP + retval_off [ return value ] BPF_TRAMP_F_CALL_ORIG or 2a5ab77af7f94d Xu Kuohai 2024-04-13 1578 * BPF_TRAMP_F_RET_FENTRY_RET 2a5ab77af7f94d Xu Kuohai 2024-04-13 1579 * 2a5ab77af7f94d Xu Kuohai 2024-04-13 1580 * [ argN ] 2a5ab77af7f94d Xu Kuohai 2024-04-13 1581 * [ ... ] 2a5ab77af7f94d Xu Kuohai 2024-04-13 1582 * SP + args_off [ arg1 ] 2a5ab77af7f94d Xu Kuohai 2024-04-13 1583 */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1584 2a5ab77af7f94d Xu Kuohai 2024-04-13 1585 stack_size = 0; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1586 2a5ab77af7f94d Xu Kuohai 2024-04-13 1587 args_off = stack_size; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1588 /* room for args */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1589 stack_size += nargs * 8; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1590 2a5ab77af7f94d Xu Kuohai 2024-04-13 1591 /* room for return value */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1592 retval_off = stack_size; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1593 save_ret = flags & (BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_RET_FENTRY_RET); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1594 if (save_ret) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1595 stack_size += 8; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1596 2a5ab77af7f94d Xu Kuohai 2024-04-13 1597 /* room for callee saved registers, currently only x19 is used */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1598 regs_off = stack_size; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1599 stack_size += 8; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1600 2a5ab77af7f94d Xu Kuohai 2024-04-13 1601 /* round up to multiples of 16 to avoid SPAlignmentFault */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1602 stack_size = round_up(stack_size, 16); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1603 2a5ab77af7f94d Xu Kuohai 2024-04-13 1604 /* return address locates above FP */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1605 retaddr_off = stack_size + 8; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1606 2a5ab77af7f94d Xu Kuohai 2024-04-13 1607 /* bpf trampoline may be invoked by 3 instruction types: 2a5ab77af7f94d Xu Kuohai 2024-04-13 1608 * 1. bl, attached to bpf prog or kernel function via short jump 2a5ab77af7f94d Xu Kuohai 2024-04-13 1609 * 2. br, attached to bpf prog or kernel function via long jump 2a5ab77af7f94d Xu Kuohai 2024-04-13 1610 * 3. blr, working as a function pointer, used by struct_ops. 2a5ab77af7f94d Xu Kuohai 2024-04-13 1611 * So BTI_JC should used here to support both br and blr. 2a5ab77af7f94d Xu Kuohai 2024-04-13 1612 */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1613 emit_bti(A64_BTI_JC, ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1614 2a5ab77af7f94d Xu Kuohai 2024-04-13 1615 /* frame for parent function */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1616 emit(A64_PUSH(A64_FP, A64_R(9), A64_SP), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1617 emit(A64_MOV(1, A64_FP, A64_SP), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1618 2a5ab77af7f94d Xu Kuohai 2024-04-13 1619 /* frame for patched function */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1620 emit(A64_PUSH(A64_FP, A64_LR, A64_SP), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1621 emit(A64_MOV(1, A64_FP, A64_SP), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1622 2a5ab77af7f94d Xu Kuohai 2024-04-13 1623 /* allocate stack space */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1624 emit(A64_SUB_I(1, A64_SP, A64_SP, stack_size), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1625 2a5ab77af7f94d Xu Kuohai 2024-04-13 1626 /* save args */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1627 save_args(ctx, args_off, nargs); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1628 2a5ab77af7f94d Xu Kuohai 2024-04-13 1629 /* save callee saved registers */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1630 emit(A64_STR64I(A64_R(19), A64_SP, regs_off), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1631 2a5ab77af7f94d Xu Kuohai 2024-04-13 1632 if (flags & BPF_TRAMP_F_CALL_ORIG) { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1633 emit_addr_mov_i64(A64_R(0), (const u64)im, ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1634 emit_call((const u64)__bpf_tramp_enter, ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1635 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1636 2a5ab77af7f94d Xu Kuohai 2024-04-13 1637 for (i = 0; i < fentry->nr_progs; i++) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1638 invoke_bpf_prog(ctx, fentry->progs[i], args_off, 2a5ab77af7f94d Xu Kuohai 2024-04-13 1639 retval_off, flags & BPF_TRAMP_F_RET_FENTRY_RET); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1640 2a5ab77af7f94d Xu Kuohai 2024-04-13 1641 if (fmod_ret->nr_progs) { 43be0c0544c8e7 Xu Kuohai 2024-04-13 1642 branches = kcalloc(fmod_ret->nr_progs, sizeof(__le32 *), 2a5ab77af7f94d Xu Kuohai 2024-04-13 1643 GFP_KERNEL); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1644 if (!branches) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1645 return -ENOMEM; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1646 2a5ab77af7f94d Xu Kuohai 2024-04-13 @1647 invoke_bpf_mod_ret(ctx, fmod_ret, args_off, retval_off, branches); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1648 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1649 2a5ab77af7f94d Xu Kuohai 2024-04-13 1650 if (flags & BPF_TRAMP_F_CALL_ORIG) { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1651 restore_args(ctx, args_off, nargs); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1652 /* call original func */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1653 emit(A64_LDR64I(A64_R(10), A64_SP, retaddr_off), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1654 emit(A64_BLR(A64_R(10)), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1655 /* store return value */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1656 emit(A64_STR64I(A64_R(0), A64_SP, retval_off), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1657 /* reserve a nop for bpf_tramp_image_put */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1658 im->ip_after_call = ctx->image + ctx->idx; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1659 emit(A64_NOP, ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1660 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1661 2a5ab77af7f94d Xu Kuohai 2024-04-13 1662 /* update the branches saved in invoke_bpf_mod_ret with cbnz */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1663 for (i = 0; i < fmod_ret->nr_progs && ctx->image != NULL; i++) { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1664 int offset = &ctx->image[ctx->idx] - branches[i]; 43be0c0544c8e7 Xu Kuohai 2024-04-13 1665 *branches[i] = cpu_to_le32(A64_CBNZ(1, A64_R(10), offset)); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1666 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1667 2a5ab77af7f94d Xu Kuohai 2024-04-13 1668 for (i = 0; i < fexit->nr_progs; i++) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1669 invoke_bpf_prog(ctx, fexit->progs[i], args_off, retval_off, false); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1670 2a5ab77af7f94d Xu Kuohai 2024-04-13 1671 if (flags & BPF_TRAMP_F_CALL_ORIG) { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1672 im->ip_epilogue = ctx->image + ctx->idx; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1673 emit_addr_mov_i64(A64_R(0), (const u64)im, ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1674 emit_call((const u64)__bpf_tramp_exit, ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1675 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1676 2a5ab77af7f94d Xu Kuohai 2024-04-13 1677 if (flags & BPF_TRAMP_F_RESTORE_REGS) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1678 restore_args(ctx, args_off, nargs); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1679 2a5ab77af7f94d Xu Kuohai 2024-04-13 1680 /* restore callee saved register x19 */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1681 emit(A64_LDR64I(A64_R(19), A64_SP, regs_off), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1682 2a5ab77af7f94d Xu Kuohai 2024-04-13 1683 if (save_ret) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1684 emit(A64_LDR64I(A64_R(0), A64_SP, retval_off), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1685 2a5ab77af7f94d Xu Kuohai 2024-04-13 1686 /* reset SP */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1687 emit(A64_MOV(1, A64_SP, A64_FP), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1688 2a5ab77af7f94d Xu Kuohai 2024-04-13 1689 /* pop frames */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1690 emit(A64_POP(A64_FP, A64_LR, A64_SP), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1691 emit(A64_POP(A64_FP, A64_R(9), A64_SP), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1692 2a5ab77af7f94d Xu Kuohai 2024-04-13 1693 if (flags & BPF_TRAMP_F_SKIP_FRAME) { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1694 /* skip patched function, return to parent */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1695 emit(A64_MOV(1, A64_LR, A64_R(9)), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1696 emit(A64_RET(A64_R(9)), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1697 } else { 2a5ab77af7f94d Xu Kuohai 2024-04-13 1698 /* return to patched function */ 2a5ab77af7f94d Xu Kuohai 2024-04-13 1699 emit(A64_MOV(1, A64_R(10), A64_LR), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1700 emit(A64_MOV(1, A64_LR, A64_R(9)), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1701 emit(A64_RET(A64_R(10)), ctx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1702 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1703 2a5ab77af7f94d Xu Kuohai 2024-04-13 1704 if (ctx->image) 2a5ab77af7f94d Xu Kuohai 2024-04-13 1705 bpf_flush_icache(ctx->image, ctx->image + ctx->idx); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1706 2a5ab77af7f94d Xu Kuohai 2024-04-13 1707 kfree(branches); 2a5ab77af7f94d Xu Kuohai 2024-04-13 1708 2a5ab77af7f94d Xu Kuohai 2024-04-13 1709 return ctx->idx; 2a5ab77af7f94d Xu Kuohai 2024-04-13 1710 } 2a5ab77af7f94d Xu Kuohai 2024-04-13 1711 :::::: The code at line 1647 was first introduced by commit :::::: 2a5ab77af7f94dc99ac894566927f4f934ed675b bpf, arm64: Add bpf trampoline for arm64 :::::: TO: Xu Kuohai <xukuohai@huawei.com> :::::: CC: Pu Lehui <pulehui@huawei.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki