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Thu, 12 Feb 2026 03:29:14 -0800 (PST) From: Jiri Olsa X-Google-Original-From: Jiri Olsa Date: Thu, 12 Feb 2026 12:29:12 +0100 To: Ihor Solodrai Cc: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Eduard Zingerman , Amery Hung , Mykyta Yatsenko , Alexis =?iso-8859-1?Q?Lothor=E9?= , bpf@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com Subject: Re: [PATCH bpf-next v1 09/14] selftests/bpf: Fix double thread join in uprobe_multi_test Message-ID: References: <20260212011356.3266753-1-ihor.solodrai@linux.dev> <20260212011356.3266753-10-ihor.solodrai@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260212011356.3266753-10-ihor.solodrai@linux.dev> On Wed, Feb 11, 2026 at 05:13:51PM -0800, Ihor Solodrai wrote: > ASAN reported a "joining already joined thread" error. The > release_child() may be called multiple times for the same struct > child. > > Fix by setting child->thread to 0 after pthread_join. > > Signed-off-by: Ihor Solodrai Acked-by: Jiri Olsa thanks, jirka > --- > tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > 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..17881e009eee 100644 > --- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c > +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c > @@ -62,8 +62,10 @@ static void release_child(struct child *child) > return; > close(child->go[1]); > close(child->go[0]); > - if (child->thread) > + if (child->thread) { > pthread_join(child->thread, NULL); > + child->thread = 0; > + } > close(child->c2p[0]); > close(child->c2p[1]); > if (child->pid > 0) > -- > 2.53.0 > >