From nobody Wed Dec 17 10:57:57 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 463E7EE4996 for ; Mon, 21 Aug 2023 19:44:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230078AbjHUToW (ORCPT ); Mon, 21 Aug 2023 15:44:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230056AbjHUToV (ORCPT ); Mon, 21 Aug 2023 15:44:21 -0400 Received: from mail-pl1-x64a.google.com (mail-pl1-x64a.google.com [IPv6:2607:f8b0:4864:20::64a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C2887CC for ; Mon, 21 Aug 2023 12:44:19 -0700 (PDT) Received: by mail-pl1-x64a.google.com with SMTP id d9443c01a7336-1bde651db83so43901625ad.3 for ; Mon, 21 Aug 2023 12:44:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1692647059; x=1693251859; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=SSCma3xFa9r8jkJRJYtQ3UJXMDuR6ih/O0h93W+17hY=; b=PGySCjo26AZB9cqV8KpF/JMeY7vWef/kDAGS6lGDo0Q2RuJIf9UzSHhuepJrUdYeDP 3wsRtqVlyyhBzLg4NgnhNCDBql5wFYZXsWqJsTcRl1mU2NMggXSYZeYvlEGM5PpwIXvP Iielz22yjvHt+QiS4NJj5jraczBUg9QlX3xA9A8GDGKLxHpG8GP/uEWad2wSPgfT93sp EZ7hJaU0K7Ub0I5m2uJSamCTcj1KKMUbq+P7B36rHl21GsY7ypgdNkMCI3OMsw5Bbwl2 k8PVgGtQS/r/6BfdZ40O7B8paUefkaPLaVdXZYLeI194w5SGzeP5V2ybLicvfal8Jy53 Rw+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692647059; x=1693251859; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=SSCma3xFa9r8jkJRJYtQ3UJXMDuR6ih/O0h93W+17hY=; b=BjUoDwaiH7P5oTrtVWA9Ba8FqXJ1NHaMOkjpOAKov7Y17fDisB/fraj5cFdAUUL5hR JAFQzDKvCVpd0wI73GHFapSwmcwitevf1ZmvdpmbRUdv6vpDul1LAGpsARhu/jw1iOO/ hzzS4HEnCgC8Hbm57rr5in6cjYTOwoxht0x5ABUjDEQOUnf1VuX8StWI4TyaD7unWK7/ K2fmqB5siF/0JQK/x2zEfM7RrhN/kFwA40TSS6waGDI1v2hE4EDRbYEmIR0Hzyv9hz2D yxX6UeallWVlkns6ymyNOXyvh+Dfj0w7FPbKqJfRHvkWcQag2aWvO/OsoIlurbe39HEx XgUA== X-Gm-Message-State: AOJu0YxpYj8IITumeIi66Jof4llTl9HaHhTGxUr4DN1XhgQaR7q0RwC/ lVleavSYf5K/+1fFH6MBB8/sBSyHE72GV8Hnpg== X-Google-Smtp-Source: AGHT+IFZOgwoG4uIlCSpVcliJBnuI18zwdWZJ8yxViklw8jp6EKLckJ2Gu/KsjtW8j9EbVROEO3Wi7ZjHJ6bUpcQ0Q== X-Received: from ackerleytng-ctop.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:13f8]) (user=ackerleytng job=sendgmr) by 2002:a17:903:41d0:b0:1b8:84d9:dea6 with SMTP id u16-20020a17090341d000b001b884d9dea6mr3274875ple.12.1692647059281; Mon, 21 Aug 2023 12:44:19 -0700 (PDT) Date: Mon, 21 Aug 2023 19:44:11 +0000 Mime-Version: 1.0 X-Mailer: git-send-email 2.42.0.rc1.204.g551eb34607-goog Message-ID: <20230821194411.2165757-1-ackerleytng@google.com> Subject: [PATCH] KVM: selftests: Add tests - invalid inputs for KVM_CREATE_GUEST_MEMFD From: Ackerley Tng To: pbonzini@redhat.com, seanjc@google.com, tglx@linutronix.de, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, shuah@kernel.org, andrew.jones@linux.dev, ricarkol@google.com, chao.p.peng@linux.intel.com, tabba@google.com, jarkko@kernel.org, yu.c.zhang@linux.intel.com, vannapurve@google.com, ackerleytng@google.com, erdemaktas@google.com, mail@maciej.szmigiero.name, vbabka@suse.cz, david@redhat.com, qperret@google.com, michael.roth@amd.com, wei.w.wang@intel.com, liam.merwick@oracle.com, isaku.yamahata@gmail.com, kirill.shutemov@linux.intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Test that invalid inputs for KVM_CREATE_GUEST_MEMFD, such as non-page-aligned page size and invalid flags, are rejected by the KVM_CREATE_GUEST_MEMFD with EINVAL Signed-off-by: Ackerley Tng --- .../testing/selftests/kvm/guest_memfd_test.c | 33 +++++++++++++++++++ .../selftests/kvm/include/kvm_util_base.h | 11 +++++-- 2 files changed, 42 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing= /selftests/kvm/guest_memfd_test.c index eb93c608a7e0..a8e37f001297 100644 --- a/tools/testing/selftests/kvm/guest_memfd_test.c +++ b/tools/testing/selftests/kvm/guest_memfd_test.c @@ -90,6 +90,37 @@ static void test_fallocate(int fd, size_t page_size, siz= e_t total_size) TEST_ASSERT(!ret, "fallocate to restore punched hole should succeed"); } =20 +static void test_create_guest_memfd_invalid(struct kvm_vm *vm, size_t page= _size) +{ + int fd; + uint64_t size; + uint64_t flags; + uint64_t valid_flags =3D 0; + + for (size =3D 1; size < page_size; size++) { + fd =3D __vm_create_guest_memfd(vm, size, 0); + TEST_ASSERT( + fd =3D=3D -1, + "Creating guest memfds with non-page-aligned page sizes should fail"); + TEST_ASSERT(errno =3D=3D EINVAL, "... and errno should be set to EINVAL"= ); + } + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + valid_flags =3D KVM_GUEST_MEMFD_ALLOW_HUGEPAGE; +#endif + + for (flags =3D 1; flags; flags <<=3D 1) { + if (flags & valid_flags) + continue; + + fd =3D __vm_create_guest_memfd(vm, page_size, flags); + TEST_ASSERT( + fd =3D=3D -1, + "Creating guest memfds with invalid flags should fail"); + TEST_ASSERT(errno =3D=3D EINVAL, "... and errno should be set to EINVAL"= ); + } +} + =20 int main(int argc, char *argv[]) { @@ -103,6 +134,8 @@ int main(int argc, char *argv[]) =20 vm =3D vm_create_barebones(); =20 + test_create_guest_memfd_invalid(vm, page_size); + fd =3D vm_create_guest_memfd(vm, total_size, 0); =20 test_file_read_write(fd); diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/te= sting/selftests/kvm/include/kvm_util_base.h index 39b38c75b99c..8bdfadd72349 100644 --- a/tools/testing/selftests/kvm/include/kvm_util_base.h +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h @@ -474,7 +474,8 @@ static inline uint64_t vm_get_stat(struct kvm_vm *vm, c= onst char *stat_name) } =20 void vm_create_irqchip(struct kvm_vm *vm); -static inline int vm_create_guest_memfd(struct kvm_vm *vm, uint64_t size, + +static inline int __vm_create_guest_memfd(struct kvm_vm *vm, uint64_t size, uint64_t flags) { struct kvm_create_guest_memfd gmem =3D { @@ -482,7 +483,13 @@ static inline int vm_create_guest_memfd(struct kvm_vm = *vm, uint64_t size, .flags =3D flags, }; =20 - int fd =3D __vm_ioctl(vm, KVM_CREATE_GUEST_MEMFD, &gmem); + return __vm_ioctl(vm, KVM_CREATE_GUEST_MEMFD, &gmem); +} + +static inline int vm_create_guest_memfd(struct kvm_vm *vm, uint64_t size, + uint64_t flags) +{ + int fd =3D __vm_create_guest_memfd(vm, size, flags); =20 TEST_ASSERT(fd >=3D 0, KVM_IOCTL_ERROR(KVM_CREATE_GUEST_MEMFD, fd)); return fd; --=20 2.42.0.rc1.204.g551eb34607-goog