From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793724866; b=lzeudaCR5hjLBQudQsLso5GVV1GAZvCCNrd2zd6hmJ3kIw6ArVDYv+24113UNs2HDmVE XBReI+2bV71VFt8uYbKihe9HY73PlgJwHP5KPDa/NONugM/gZweoQe+S5lL/mX6T/mfjR 74vdurh+d9YNANwwLoaRCrGFbum5dFV331OOq0VNXCJwY/9CYqX/sfm7rGG6uKyRT+/eX E7TP6l67fNo9uPypBmlLBeBUJ/TiD0UInAE4bE9XeelGXDidBqSsIoi0hBoDv7CUpga3N OjnU46cxLTEA32LM7vZDSi9s1q0jwDgxq+bS8gjVvIDsZ7/He7+87xpJNPpiNxIlPlA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793724866; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=9E8O4GJrrDPUZq5FZkBH34WVGX8r7ZAAIL0omDrXCko=; b=kxrH+54lIIJh5Wc5QtAji6JscrAjwU51CpaLzyZNZFZm5NiF61xYbgJ+ExY7pZ0eL7r4 13gj7q8JUPFc6KxgLb7JxtpqNEodGqJuWFz8/tSkG08iY7+5KAFTQBYzU5/nh1qkSg1YQ WFCIDJsXGQvrpGRZ7jLOvVPimVenqG59rdxp1M+20onF6NnqKGuPN25ZAP2KCWi0TqlL8 wxJvSvrwvIe7s8B/pN/ND0ITj5bSX0bID0o6q5OQVz+XHooW6UElYv+5QStRylmciL7on VCsZu14yM1w4YiDwdfEmXFZ3mgO58Eulp3UNUcWz5hFJUrickR26srxALI+Q5UZv/dg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=OVGT3Kyf; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C72AB606D818; Tue, 3 Nov 2026 16:54:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=OVGT3Kyf Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9E0601F00A18; Tue, 3 Nov 2026 16:54:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793724865; bh=9E8O4GJrrDPUZq5FZkBH34WVGX8r7ZAAIL0omDrXCko=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=OVGT3KyfSO7lz698T/7ZIH19zf/F71nm3PVqZxgHe3otI7z1Z2q9m/VOYj/7pHpU9 A+vRPIriUmHo66gIO2miB288wqxkXmUJbIRy8Yy15XJqT54ZmP7/POqwbgWJm5l3lM 2KsxVrZWx2MVRPl4j6DYL+Cgv6S7f28clNz2KhBm8STmkzFaBRKfW0bqYgF+htRXoY K0aDYHa+zNYI+6Wxpu4BMSuFhsegU98toErDlTwr/gCqjExv55vx7Dlorqqzcy/hyv s4CaUL+QBHrtCbJzyXzLjXNX53gosClI/vn+ccD7x8uZ/nC/hZ+HgcD4P+Zbc/1r+E 58HROTINW5O7Q== From: Sasha Levin To: Christian Brauner Cc: Sasha Levin , Shuah Khan , Nathan Chancellor , linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org, llvm@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] selftests/namespaces: initialize the byte the children write Date: Tue, 3 Nov 2026 11:54:17 -0500 Message-ID: <20261103165419.687806-4-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261103165419.687806-1-sashal@kernel.org> References: <20261103165419.687806-1-sashal@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The children in listns_pagination_bug and stress_test write c to the parent only to say they are ready, but never set it, and clang 21 warns: stress_test.c:137:22: warning: variable 'c' is uninitialized when passed as a const pointer argument here [-Wuninitialized-const-pointer] Initialize it to 'X', as the parent does with its byte. Signed-off-by: Sasha Levin --- Found with clang 21. The namespaces tests aren't in TARGETS in tools/testing/selftests/Makefile, so CI doesn't build or run them. Is that on purpose? tools/testing/selftests/namespaces/listns_pagination_bug.c | 2 +- tools/testing/selftests/namespaces/stress_test.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/namespaces/listns_pagination_bug.c b/tools/testing/selftests/namespaces/listns_pagination_bug.c index da7d33f963972..6452825e88506 100644 --- a/tools/testing/selftests/namespaces/listns_pagination_bug.c +++ b/tools/testing/selftests/namespaces/listns_pagination_bug.c @@ -46,7 +46,7 @@ TEST(pagination_with_type_filter) ASSERT_GE(pids[i], 0); if (pids[i] == 0) { - char c; + char c = 'X'; close(sv[0]); if (setup_userns() < 0) { diff --git a/tools/testing/selftests/namespaces/stress_test.c b/tools/testing/selftests/namespaces/stress_test.c index dd7df7d6cb277..6a27b98c5bc2a 100644 --- a/tools/testing/selftests/namespaces/stress_test.c +++ b/tools/testing/selftests/namespaces/stress_test.c @@ -124,7 +124,7 @@ TEST(many_concurrent_namespaces) if (pids[i] == 0) { /* Child: create user namespace and wait for parent signal */ - char c; + char c = 'X'; close(sv[0]); @@ -366,7 +366,7 @@ TEST(listns_pagination_stress) ASSERT_GE(pids[i], 0); if (pids[i] == 0) { - char c; + char c = 'X'; close(sv[0]); if (setup_userns() < 0) { -- 2.53.0