Re: [PATCH bpf-next] selftests/bpf: fix trampoline_count clean up logic

Libbpf's Travis CI tests caught this issue. Ensure bpf_link and bpf_object
clean up is performed correctly.

Fixes: d633d57902a5 ("selftest/bpf: Add test for allowed trampolines count")
Cc: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <redacted>
---
 .../bpf/prog_tests/trampoline_count.c         | 25 +++++++++++++------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/trampoline_count.c b/tools/testing/selftests/bpf/prog_tests/trampoline_count.c
index 1f6ccdaed1ac..781c8d11604b 100644
--- a/tools/testing/selftests/bpf/prog_tests/trampoline_count.c
+++ b/tools/testing/selftests/bpf/prog_tests/trampoline_count.c

@@ -55,31 +55,40 @@ void test_trampoline_count(void)
        /* attach 'allowed' 40 trampoline programs */
        for (i = 0; i < MAX_TRAMP_PROGS; i++) {
                obj = bpf_object__open_file(object, NULL);
-               if (CHECK(IS_ERR(obj), "obj_open_file", "err %ld\n", PTR_ERR(obj)))
+               if (CHECK(IS_ERR(obj), "obj_open_file", "err %ld\n", PTR_ERR(obj))) {
+                       obj = NULL;