diff options
| -rw-r--r-- | tools/testing/selftests/bpf/progs/mem_rdonly_untrusted.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/mem_rdonly_untrusted.c b/tools/testing/selftests/bpf/progs/mem_rdonly_untrusted.c index b0486af36f55..8185130ede95 100644 --- a/tools/testing/selftests/bpf/progs/mem_rdonly_untrusted.c +++ b/tools/testing/selftests/bpf/progs/mem_rdonly_untrusted.c @@ -174,4 +174,25 @@ int misaligned_access(void *ctx) return combine(bpf_rdonly_cast(&global, 0) + 1); } +__weak int return_one(void) +{ + return 1; +} + +SEC("socket") +__success +__retval(1) +int null_check(void *ctx) +{ + int *p; + + p = bpf_rdonly_cast(0, 0); + if (p == 0) + /* make this a function call to avoid compiler + * moving r0 assignment before check. + */ + return return_one(); + return 0; +} + char _license[] SEC("license") = "GPL"; |