diff options
| -rw-r--r-- | tools/testing/selftests/bpf/progs/verifier_spin_lock.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/verifier_spin_lock.c b/tools/testing/selftests/bpf/progs/verifier_spin_lock.c index 25599eac9a70..d9d7b05cf6d2 100644 --- a/tools/testing/selftests/bpf/progs/verifier_spin_lock.c +++ b/tools/testing/selftests/bpf/progs/verifier_spin_lock.c @@ -530,4 +530,30 @@ l1_%=: exit; \ : __clobber_all); } +SEC("tc") +__description("spin_lock: loop within a locked region") +__success __failure_unpriv __msg_unpriv("") +__retval(0) +int bpf_loop_inside_locked_region(void) +{ + const int zero = 0; + struct val *val; + int i, j = 0; + + val = bpf_map_lookup_elem(&map_spin_lock, &zero); + if (!val) + return -1; + + bpf_spin_lock(&val->l); + bpf_for(i, 0, 10) { + j++; + /* Silence "unused variable" warnings. */ + if (j == 10) + break; + } + bpf_spin_unlock(&val->l); + + return 0; +} + char _license[] SEC("license") = "GPL"; |