diff options
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/verifier_unpriv.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/verifier_unpriv.c b/tools/testing/selftests/bpf/progs/verifier_unpriv.c index 28b4f7035ceb..8ee1243e62a8 100644 --- a/tools/testing/selftests/bpf/progs/verifier_unpriv.c +++ b/tools/testing/selftests/bpf/progs/verifier_unpriv.c @@ -950,4 +950,26 @@ l3_%=: r0 = 0; \ " ::: __clobber_all); } +SEC("socket") +__description("unpriv: nospec after dead stack write in helper") +__success __success_unpriv +__retval(0) +/* Dead code sanitizer rewrites the call to `goto -1`. */ +__naked void unpriv_dead_helper_stack_write_nospec_result(void) +{ + asm volatile (" \ + r0 = 0; \ + if r0 != 1 goto l0_%=; \ + r2 = 0; \ + r3 = r10; \ + r3 += -16; \ + r4 = 4; \ + r5 = 0; \ + call %[bpf_skb_load_bytes_relative]; \ +l0_%=: exit; \ +" : + : __imm(bpf_skb_load_bytes_relative) + : __clobber_all); +} + char _license[] SEC("license") = "GPL"; |