[PATCH bpf v2 09/15] selftests/bpf: Fix double thread join in uprobe_multi_test

[Ihor Solodrai]

ASAN reported a "joining already joined thread" error. The
release_child() may be called multiple times for the same struct
child.

Fix with a memset(0) call at the end of release_child().

Acked-by: Mykyta Yatsenko <yatsenko@xxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Ihor Solodrai <ihor.solodrai@xxxxxxxxx>
---
 tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
index 2ee17ef1dae2..be6ff1d4a75b 100644
--- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
+++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
@@ -68,6 +68,7 @@ static void release_child(struct child *child)
 	close(child->c2p[1]);
 	if (child->pid > 0)
 		waitpid(child->pid, &child_status, 0);
+	memset(child, 0, sizeof(*child));
 }
 
 static void kick_child(struct child *child)
-- 
2.53.0