[PATCH net-next] bpf: fix segfault in test_verifier selftest

[Daniel Borkmann]

Minor fallout from merge resolution, test_verifier was segfaulting
because the REJECT result was correct, but errstr was NULL. Properly
fix it as in 339bbff2d6e0.

Fixes: 339bbff2d6e0 ("Merge 
git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next")
Signed-off-by: Daniel Borkmann <dan...@iogearbox.net>
---
 [ Hi David, would be great if you could take it directly, thanks! ]

 tools/testing/selftests/bpf/test_verifier.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/test_verifier.c 
b/tools/testing/selftests/bpf/test_verifier.c
index baafe5c76aca..33f7d38849b8 100644
--- a/tools/testing/selftests/bpf/test_verifier.c
+++ b/tools/testing/selftests/bpf/test_verifier.c
@@ -14194,7 +14194,8 @@ static struct bpf_test tests[] = {
                },
                .prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
                .errstr_unpriv = "function calls to other bpf functions are 
allowed for root only",
-                .result = REJECT,
+               .errstr = "!read_ok",
+               .result = REJECT,
        },
        {
                "jset: functional",
-- 
2.17.1