From nobody Tue Dec 2 00:46:54 2025 Received: from mailtransmit05.runbox.com (mailtransmit05.runbox.com [185.226.149.38]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4753A23956E for ; Sun, 23 Nov 2025 21:44:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.226.149.38 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763934278; cv=none; b=cztd7TOHQGEtYWRDrhOywE4ASVYGIMp1foTcuzQ/TRnG8W23jnrAE3n/p1OfOuCR86ltsAkUR0M8tqRpInGN9BuZnIwkLOXEdz1juEHBzPk9FbE/5OOpdnMiV3nQI+bPBFRjgIytoE4P8FlqB1mibNStiTUhJrcJZAGp9yqrlxI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763934278; c=relaxed/simple; bh=YnAqnVhefJQhHWyg4GDsHFfAzb/FVEajMMONO1WyS7g=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=QtDT292+Hu+A4VZlgwICLuCLckYt5grByfJIh072SIcvMd5xTJW/n+glMM5whJdOPIOI/BmH42z5dLORerUnomnN1xf/oWNZWV7sGDsE8YJBbWuWGkIGHSI7ah5i528nc8KNDC/lon69pukX/GikwfUXakSos/cx/dsOBfYaYMc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rbox.co; spf=pass smtp.mailfrom=rbox.co; dkim=pass (2048-bit key) header.d=rbox.co header.i=@rbox.co header.b=VWDrtqYF; arc=none smtp.client-ip=185.226.149.38 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rbox.co Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rbox.co Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rbox.co header.i=@rbox.co header.b="VWDrtqYF" Received: from mailtransmit02.runbox ([10.9.9.162] helo=aibo.runbox.com) by mailtransmit05.runbox.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1vNHsf-001CaQ-LR; Sun, 23 Nov 2025 22:44:25 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=rbox.co; s=selector1; h=Cc:To:Message-Id:Content-Transfer-Encoding:Content-Type: MIME-Version:Subject:Date:From; bh=V9XciyjlPqOIODNDKT7LjWupfpjUN2cRjyKec+JBlfM=; b=VWDrtqYFUqaINJQB8CERFZ+0oQ z/z/3QgZKEvH4nvQDP+0znA97SeCwshuFbgbxWouvEGXjFseVqH8BmcghuONbD8lf6MnO0sug34ka J/O7FBmrKXaJmFSglZW9rw4hT/uH9Jtm68h3s8uSzpIX+IICxSViEkwUjvZ7Ke2/fcuk6ZU5a6RVg pq/Lmk30HVlfnvcvQt1Y3SUJ7sOj8eeGZ7zUui2vbh8uLQqxjHTCjVZLKXrX3xHqq2yu8tw+GU2aA 0C6KFlcLZ+ELxTrI2bk2YXwc6StRf94xgkpefDvyNzXH8Q0eDszHzN1f/xVaTc/mAsN0S7x6IWVmP VpZ1Fl4A==; Received: from [10.9.9.72] (helo=submission01.runbox) by mailtransmit02.runbox with esmtp (Exim 4.86_2) (envelope-from ) id 1vNHsf-0005lR-6m; Sun, 23 Nov 2025 22:44:25 +0100 Received: by submission01.runbox with esmtpsa [Authenticated ID (604044)] (TLS1.2:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.93) id 1vNHsX-006w0W-Ew; Sun, 23 Nov 2025 22:44:17 +0100 From: Michal Luczaj Date: Sun, 23 Nov 2025 22:43:59 +0100 Subject: [PATCH net-next] vsock/test: Extend transport change null-ptr-deref test 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="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251123-vsock_test-linger-lockdep-warn-v1-1-4b1edf9d8cdc@rbox.co> X-B4-Tracking: v=1; b=H4sIAB6AI2kC/x2NUQqDMBAFryL73QUTGii9SiklTV7bpbLKJqgg3 t3g57yBNxsVmKDQvdvIMEuRURu4S0fpF/ULltyYfO+Dc97xXMb0f1WUyoM0bzy0IWPiJZoyrim 8bxkxoKd2Mhk+sp6BBykqK9ZKz30/AGGMtwt6AAAA X-Change-ID: 20251121-vsock_test-linger-lockdep-warn-e4c5b8dea5e0 To: Stefano Garzarella Cc: virtualization@lists.linux.dev, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Michal Luczaj X-Mailer: b4 0.14.3 syzkaller reported a lockdep lock order inversion warning[1] due to commit 687aa0c5581b ("vsock: Fix transport_* TOCTOU"). This was fixed in commit f7c877e75352 ("vsock: fix lock inversion in vsock_assign_transport()"). Redo syzkaller's repro by piggybacking on a somewhat related test implemented in commit 3a764d93385c ("vsock/test: Add test for null ptr deref when transport changes"). [1]: https://lore.kernel.org/netdev/68f6cdb0.a70a0220.205af.0039.GAE@google= .com/ Signed-off-by: Michal Luczaj Reviewed-by: Stefano Garzarella --- tools/testing/vsock/vsock_test.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_t= est.c index d4517386e551..9e1250790f33 100644 --- a/tools/testing/vsock/vsock_test.c +++ b/tools/testing/vsock/vsock_test.c @@ -2015,6 +2015,11 @@ static void test_stream_transport_change_client(cons= t struct test_opts *opts) exit(EXIT_FAILURE); } =20 + /* Although setting SO_LINGER does not affect the original test + * for null-ptr-deref, it may trigger a lockdep warning. + */ + enable_so_linger(s, 1); + ret =3D connect(s, (struct sockaddr *)&sa, sizeof(sa)); /* The connect can fail due to signals coming from the thread, * or because the receiver connection queue is full. @@ -2352,7 +2357,7 @@ static struct test_case test_cases[] =3D { .run_server =3D test_stream_nolinger_server, }, { - .name =3D "SOCK_STREAM transport change null-ptr-deref", + .name =3D "SOCK_STREAM transport change null-ptr-deref, lockdep warn", .run_client =3D test_stream_transport_change_client, .run_server =3D test_stream_transport_change_server, }, --- base-commit: 73138ebe792b9af2954292cc5cfa780a5e796d97 change-id: 20251121-vsock_test-linger-lockdep-warn-e4c5b8dea5e0 Best regards, --=20 Michal Luczaj