From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f48.google.com (mail-wm1-f48.google.com [209.85.128.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D8AD93B38A1 for ; Wed, 29 Apr 2026 21:22:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777497752; cv=none; b=YlZaId5F9SdumGnUU07nxxf5qRvDV1Sl8XP5G+aGY8E6tkn0xZtqPczETs9tWdvCOUM/tRO6R9yj+/RhlkeYFBECHBzHvyYKMVZXiW6eEcQywBsaJN9vC25JK75+tZRQsstEVClvTO2t6WfL6Vuldz7x4ybJv0icOSvai5OO5u0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777497752; c=relaxed/simple; bh=MVF/NUnwt4T8A9Ip9OQGyCJsA+8dvd+yvSjTW5P6IKw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=awhFs8RC7G60TnkUKEgFrSfxtWnn+zI/mtAkXzEEd0cQxOup7bwlkkVNNBUzOwfl9hDP9izCDdrl/ew29ONdYumu1FI9QU+cZGT7QNJqDGUc7PYYtwJRAaNKsXcxak810F7sdC+R+2+XgC6ZzBiTg5C/V5nfxyen4Txv0JKbBGo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=UIFWi2ab; arc=none smtp.client-ip=209.85.128.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="UIFWi2ab" Received: by mail-wm1-f48.google.com with SMTP id 5b1f17b1804b1-488ab2db91aso2597185e9.3 for ; Wed, 29 Apr 2026 14:22:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1777497749; x=1778102549; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ykJFzTkCkC0C2lj+ZZ4uY5vhivTKu7ETItTHYfKS1Gw=; b=UIFWi2ab7YFhQ2LV+a156gUoBxfpDHXG7ZOYnc09jLifryHqjSZOaxgLbBioeDQl2e OR4YaoEE14sx6InmcPwiK1/MPuX6rBEgyj7kYqbYWh779kRx56eXfLgydHG+G/WgEqlp V4MK6Klj9UZyDfcPicwZmLM0lrQqaCs6X+dtQriNh/7c/MUvWsQuUu/fioopNiQ2WkqL 789zFK6kgPPzJkKFKMz8UfKO1Xe4VIpvEe20LzP4af08MjqciXZKF4jo8xM6ICm+HsY8 JhXCGGiAkzMlNhLlk+ThUwOKieO+eXMyq/c17oo6cjeXBMuktJQhDB0lZuD9y2dvuRRb 2HUg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777497749; x=1778102549; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=ykJFzTkCkC0C2lj+ZZ4uY5vhivTKu7ETItTHYfKS1Gw=; b=RgbM6gmjd3Lf0C1L1bbThLrKU9mXErq816IxKfq3tiXhfe+HEiqMDmMoAFFqzRcGGi JvDsD+G91HgvQvzoFDjl6MMZsAAjPqlsxm14QB7rsHkLgPuTWoJOUMshHIvCbsESWOCz ZEgNXXx+TvN4XmRIkU2OO0Gk4QuYQ2DrBXuXFhDa6i7iMJnAGycLzyw6mY0W/XP7T4Q6 82pXkHdCrvvNqhwEMa1t8Zn4ShFmtTAerk21d35yQi/RDpacYvM4lJ77H8rWhJT9GB9I IbNeJN6iBTx+e/tkEmC2plQWtvy+l0eYStWWBshvIaqpGfMlsYfqIM1e0BD624SWIijI 9KqA== X-Forwarded-Encrypted: i=1; AFNElJ+LeMojoSfYSeV8w6GCSzsDwU56O9JQpmrZt0u3kgKEPsF+EI0JOOF0RIe11mQzAFlrxFqf6kJFSLN6bEc=@vger.kernel.org X-Gm-Message-State: AOJu0Yxb7Z0svWNeWwzXtAM4ZdFmsFZ29QgZhOcm8p+ny+3981Ns4165 F94xsQ8Bw+LoYzCibqtaZL3F4Dpgco89NSIyeY477OpBe+0Jc/fzbOUs X-Gm-Gg: AeBDieuuGrwLMCmERLyvlNCDBi9gqX/w82d7ZufVyUtmGiGPgUVjkgmO5FGXvz83HOc 9waMiolQ4/yjPQ9UuBYl4zWkA4PBtmVjof1GBtWlg2pROUo7UqRIz1M6fBFeblXWYtbChgCL36G c80TIbgY9+HSJ0qfm1NQL49MsgvBcND6F59MoYrDYzoqpA9KOJdm0+eEFq6GOkwN1oa45F6CyTI g41lqsp//umvIlwgfAkhlkCzafRKu5ow5Xhtvi8zZ2xTxLaZCxJsKMVwl3yexN4lux7J7pyebTS uR1Lwi3+mR06IF7RLDqcpHwa+5hmHclo2C4DfKbIkfnlhJnnN4g3MaZ2zGLPoqgkiolCNydj07H CHjruCD89A0VgD6J4QcBtXHDaVYcxKYtMkk2ixDIlEopBkEh67fVUcxRNLvKqNWTyuKmTuPs1EJ q26o5RMj/eZY0WUNBy52+ckNblVWZlziTfX6JkUuU= X-Received: by 2002:a05:600c:8b22:b0:485:3a03:ceca with SMTP id 5b1f17b1804b1-48a844582c3mr4663845e9.23.1777497749079; Wed, 29 Apr 2026 14:22:29 -0700 (PDT) Received: from localhost ([2a01:4b00:d036:ae00:8fc7:44bf:8aca:ebae]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-48a7c3057f8sm26200425e9.14.2026.04.29.14.22.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Apr 2026 14:22:27 -0700 (PDT) From: luca.boccassi@gmail.com To: kexec@lists.infradead.org Cc: linux-mm@kvack.org, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, linux-kernel@vger.kernel.org, Luca Boccassi , stable@vger.kernel.org Subject: [PATCH v11 2/4] selftests/liveupdate: add test cases for LIVEUPDATE_IOCTL_CREATE_SESSION calls with invalid length Date: Wed, 29 Apr 2026 22:21:15 +0100 Message-ID: <20260429212221.814107-3-luca.boccassi@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260429212221.814107-1-luca.boccassi@gmail.com> References: <20260429212221.814107-1-luca.boccassi@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Luca Boccassi Verify that LIVEUPDATE_IOCTL_CREATE_SESSION ioctl which provide a name that is an empty string or too long are not allowed. Cc: stable@vger.kernel.org Signed-off-by: Luca Boccassi Reviewed-by: Pasha Tatashin Reviewed-by: Pratyush Yadav --- .../testing/selftests/liveupdate/liveupdate.c | 42 +++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/tools/testing/selftests/liveupdate/liveupdate.c b/tools/testing/selftests/liveupdate/liveupdate.c index 37c808fbe1e9..90268d86684f 100644 --- a/tools/testing/selftests/liveupdate/liveupdate.c +++ b/tools/testing/selftests/liveupdate/liveupdate.c @@ -386,4 +386,46 @@ TEST_F(liveupdate_device, prevent_double_preservation) ASSERT_EQ(close(session_fd2), 0); } +/* + * Test Case: Create Session with No Null Termination + * + * Verifies that filling the entire 64-byte name field with non-null characters + * (no '\0' terminator) is rejected by the kernel with EINVAL. + */ +TEST_F(liveupdate_device, create_session_no_null_termination) +{ + struct liveupdate_ioctl_create_session args = {}; + + self->fd1 = open(LIVEUPDATE_DEV, O_RDWR); + if (self->fd1 < 0 && errno == ENOENT) + SKIP(return, "%s does not exist", LIVEUPDATE_DEV); + ASSERT_GE(self->fd1, 0); + + /* Fill entire name field with 'X', no null terminator */ + args.size = sizeof(args); + memset(args.name, 'X', sizeof(args.name)); + + EXPECT_LT(ioctl(self->fd1, LIVEUPDATE_IOCTL_CREATE_SESSION, &args), 0); + EXPECT_EQ(errno, EINVAL); +} + +/* + * Test Case: Create Session with Empty Name + * + * Verifies that creating a session with an empty string name fails + * with EINVAL. + */ +TEST_F(liveupdate_device, create_session_empty_name) +{ + int session_fd; + + self->fd1 = open(LIVEUPDATE_DEV, O_RDWR); + if (self->fd1 < 0 && errno == ENOENT) + SKIP(return, "%s does not exist", LIVEUPDATE_DEV); + ASSERT_GE(self->fd1, 0); + + session_fd = create_session(self->fd1, ""); + EXPECT_EQ(session_fd, -EINVAL); +} + TEST_HARNESS_MAIN -- 2.47.3