netdev - [PATCH bpf] selftests/bpf: add missing pointer dereference for map stacktrace fixup

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Message-Id: <e569eb1296ed11bba05a12ff4b3bb91e70423793.1544156000.git.sdf@google.com>
Date:   Thu,  6 Dec 2018 20:14:11 -0800
From:   Stanislav Fomichev <sdf@...gle.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, ast@...nel.org, daniel@...earbox.net,
        bhole_prashant_q7@....ntt.co.jp,
        Stanislav Fomichev <sdf@...gle.com>
Subject: [PATCH bpf] selftests/bpf: add missing pointer dereference for map
 stacktrace fixup

I get a segfault without it, other fixups always do dereference, and
without dereference I don't understand how it can ever work.

Fixes: 7c85c448e7d74 ("selftests/bpf: test_verifier, check
bpf_map_lookup_elem access in bpf prog")

Signed-off-by: Stanislav Fomichev <sdf@...gle.com>
---
 tools/testing/selftests/bpf/test_verifier.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c
index df6f751cc1e8..d23929a1985d 100644
--- a/tools/testing/selftests/bpf/test_verifier.c
+++ b/tools/testing/selftests/bpf/test_verifier.c
@@ -14166,7 +14166,7 @@ static void do_test_fixup(struct bpf_test *test, enum bpf_map_type prog_type,
 		do {
 			prog[*fixup_map_stacktrace].imm = map_fds[12];
 			fixup_map_stacktrace++;
-		} while (fixup_map_stacktrace);
+		} while (*fixup_map_stacktrace);
 	}
 }
 
-- 
2.20.0.rc2.403.gdbc3b29805-goog