diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/verifier_value_illegal_alu.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/verifier_value_illegal_alu.c b/tools/testing/selftests/bpf/progs/verifier_value_illegal_alu.c index a9ab37d3b9e2..dcaab61a11a0 100644 --- a/tools/testing/selftests/bpf/progs/verifier_value_illegal_alu.c +++ b/tools/testing/selftests/bpf/progs/verifier_value_illegal_alu.c @@ -146,6 +146,24 @@ l0_%=: exit; \ : __clobber_all); } +SEC("socket") +__description("map_ptr illegal alu op, map_ptr = -map_ptr") +__failure __msg("R0 invalid mem access 'scalar'") +__failure_unpriv __msg_unpriv("R0 pointer arithmetic prohibited") +__flag(BPF_F_ANY_ALIGNMENT) +__naked void map_ptr_illegal_alu_op(void) +{ + asm volatile (" \ + r0 = %[map_hash_48b] ll; \ + r0 = -r0; \ + r1 = 22; \ + *(u64*)(r0 + 0) = r1; \ + exit; \ +" : + : __imm_addr(map_hash_48b) + : __clobber_all); +} + SEC("flow_dissector") __description("flow_keys illegal alu op with variable offset") __failure __msg("R7 pointer arithmetic on flow_keys prohibited") |