From nobody Tue Apr 7 14:25:06 2026 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 9C2F437FF71 for ; Fri, 13 Mar 2026 06:13:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773382427; cv=none; b=LfDVEjZei2sw5oBtOSuwMcc8txlVvH5qKOfzPeaWM/5zSHW5wsj8+YDsxvAj+dZrMxJGrnGFnou9SjR1P0tBotadMiHANk8wrOAO3WAVVj23Zi2Xcr4NW8ZRJVwU1yiPHOw+YqYcmx3CH29iKXSXoqidElc4F3PtJc5QNDz5Slo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773382427; c=relaxed/simple; bh=pZ6v+xP1DHhPqvyCuFHofjd5+OY1APZufY1JisJXeEU=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=mf5KR5zKlBSe4iQqtDtS95i12Z8qMadPGtM3753x72YUS/mEYAq5eflaxC2CQyiFPaTRa40g5QOHQv8OxvwuYFvh7e/26YAUy9qyBoCd5VYe5gXznVZSi0sh4QeXBla/Rpv0xm1+DlglORfFNV3kmILrdySHG8Okb07GsfCuakg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--ackerleytng.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=auw4P1hD; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--ackerleytng.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="auw4P1hD" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-358f058973fso2004743a91.1 for ; Thu, 12 Mar 2026 23:13:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1773382422; x=1773987222; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=q3pm+yxpNJ4bjwMx7Ok0ozOrfDqq2giI/WA9S2QCn4I=; b=auw4P1hDKl8KOLQtMC5H1RREuZaZxxCctqKSEciW5TtMRl9rsmcN24j17JTa+7+WzW cXdZ/dF+BMU7oEC3qZ7F25naWHLvzsMYK+LLMlb2BOaUOjJ7I/IiSIiOD5vsDvSrZ6An 6c0r7sRv/rFgGEFPr7xJORrVNYFTd1D5NKD+vYFc4LuWyZZ9Xuq8WpgeGfiA0JePR6nN /njT0mUWCMhs9aNFA1B4QBSesp6VZtCOCC7jE+kA9czLfJ7y2A6lXT4BT9IXbKDY+Tne vHRC8fX5Qvvfvil78pcfSEnfAlk8PzHnh0lu2SEFHsCqxgy1X5FsZpe3q8gSktGjCjs+ o0tg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773382422; x=1773987222; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=q3pm+yxpNJ4bjwMx7Ok0ozOrfDqq2giI/WA9S2QCn4I=; b=iwBto6DY4lfILIHWdHmexcM8mHEmS0j8uogZDoj31y0xVZT9cXCLDhKyDwW8pQtV2c 1R1Ii2neK7wKzOoxpKcGqMTe3LVwZzNRDx2C3JwNF/BWTVAftAAsUlxthitrukhz8EMF wHF4ZUWnTrRqt4c/Ko72Uu4P2HjA/dYvBNutkVq7rLe6rfwmGx/4KIqJdLKub7NZgL0e 3fBQiHqqjWVcGhYO8pczJRvRVfXZZnwdcnsnCM1DhXUOsAvTcuvOtExsDGO/wjAqULYz oRePZvuN6LOCQQZcQPPSJVxc2x8f8HGM82Tc2GFGFkUjDBfjHJlphxFXskDgxdHxDdqi btMw== X-Forwarded-Encrypted: i=1; AJvYcCW03lvio147JVP+eiO0k9YsnoWz/+WrBWYHIH85yzgH4VaNbaf0hZZJ9KkFtmXwyGz58qJC+26nPz/7Prw=@vger.kernel.org X-Gm-Message-State: AOJu0YyyDwl7QxojqVmdR4Tkmuju5daxgIjSGXAJwHMANhH9FcVinPQ7 P+XTFT8+igWFr5K9LzjvuJqPtAhLIRc5y0ewGGRNiUKfHgmDq1tvQbP/P0VQqtl5F/5tWWl9Jrw ELIf18w8zTTonFaRuDUl0ElvmKw== X-Received: from pgam23.prod.google.com ([2002:a05:6a02:2b57:b0:c1d:a753:c89c]) (user=ackerleytng job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:1b0d:b0:359:8ef8:7a77 with SMTP id 98e67ed59e1d1-35a21e9856fmr1976153a91.9.1773382421157; Thu, 12 Mar 2026 23:13:41 -0700 (PDT) Date: Fri, 13 Mar 2026 06:13:11 +0000 In-Reply-To: <20260313-gmem-inplace-conversion-v3-0-5fc12a70ec89@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260313-gmem-inplace-conversion-v3-0-5fc12a70ec89@google.com> X-Developer-Key: i=ackerleytng@google.com; a=ed25519; pk=sAZDYXdm6Iz8FHitpHeFlCMXwabodTm7p8/3/8xUxuU= X-Developer-Signature: v=1; a=ed25519-sha256; t=1773382364; l=1296; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=2ixRhmKM6wBtzpBxyab3JJ4WtVOqoaynTYQ6b4ldkEw=; b=jT40ITR3BJfZenzh9aLy+3m9D07lyaX2Q0JABVIxCnVdwmo1loWSA2A8EGWXkC3EXk/xxd6Jc r6zcCInNS3jCw44Ylno1BpElXVZVhJBcj0DUXytmGS/K2n5bvB1aRce X-Mailer: b4 0.14.3 Message-ID: <20260313-gmem-inplace-conversion-v3-32-5fc12a70ec89@google.com> Subject: [PATCH RFC v3 32/43] KVM: selftests: Check fd/flags provided to mmap() when setting up memslot From: Ackerley Tng To: aik@amd.com, andrew.jones@linux.dev, binbin.wu@linux.intel.com, brauner@kernel.org, chao.p.peng@linux.intel.com, david@kernel.org, ira.weiny@intel.com, jmattson@google.com, jroedel@suse.de, jthoughton@google.com, michael.roth@amd.com, oupton@kernel.org, pankaj.gupta@amd.com, qperret@google.com, rick.p.edgecombe@intel.com, rientjes@google.com, shivankg@amd.com, steven.price@arm.com, tabba@google.com, willy@infradead.org, wyihan@google.com, yan.y.zhao@intel.com, forkloop@google.com, pratyush@kernel.org, suzuki.poulose@arm.com, aneesh.kumar@kernel.org, Paolo Bonzini , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Shuah Khan , Shuah Khan , Vishal Annapurve , Jason Gunthorpe , Vlastimil Babka Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Ackerley Tng Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Sean Christopherson Check that a valid fd provided to mmap() must be accompanied by MAP_SHARED. With an invalid fd (usually used for anonymous mappings), there are no constraints on mmap() flags. Add this check to make sure that when a guest_memfd is used as region->fd, the flag provided to mmap() will include MAP_SHARED. Signed-off-by: Sean Christopherson [Rephrase assertion message.] Signed-off-by: Ackerley Tng --- tools/testing/selftests/kvm/lib/kvm_util.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/sel= ftests/kvm/lib/kvm_util.c index 6deb6b333a066..6f7d3adb25d0a 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -1095,6 +1095,9 @@ void vm_mem_add(struct kvm_vm *vm, enum vm_mem_backin= g_src_type src_type, src_type =3D=3D VM_MEM_SRC_SHARED_HUGETLB); } =20 + TEST_ASSERT(region->fd =3D=3D -1 || backing_src_is_shared(src_type), + "A valid fd provided to mmap() must be accompanied by MAP_SHARED."); + region->mmap_start =3D __kvm_mmap(region->mmap_size, PROT_READ | PROT_WRI= TE, vm_mem_backing_src_alias(src_type)->flag, region->fd, mmap_offset); --=20 2.53.0.851.ga537e3e6e9-goog