| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20250912091708.17502-11-roypat@amazon.co.uk>
Date: Fri, 12 Sep 2025 09:17:46 +0000
From: "Roy, Patrick" <roypat@...zon.co.uk>
CC: "Thomson, Jack" <jackabt@...zon.co.uk>, "Kalyazin, Nikita"
<kalyazin@...zon.co.uk>, "Cali, Marco" <xmarcalx@...zon.co.uk>,
"derekmn@...zon.co.uk" <derekmn@...zon.co.uk>, "Roy, Patrick"
<roypat@...zon.co.uk>, "willy@...radead.org" <willy@...radead.org>,
"corbet@....net" <corbet@....net>, "pbonzini@...hat.com"
<pbonzini@...hat.com>, "maz@...nel.org" <maz@...nel.org>,
"oliver.upton@...ux.dev" <oliver.upton@...ux.dev>, "joey.gouly@....com"
<joey.gouly@....com>, "suzuki.poulose@....com" <suzuki.poulose@....com>,
"yuzenghui@...wei.com" <yuzenghui@...wei.com>, "catalin.marinas@....com"
<catalin.marinas@....com>, "will@...nel.org" <will@...nel.org>,
"chenhuacai@...nel.org" <chenhuacai@...nel.org>, "kernel@...0n.name"
<kernel@...0n.name>, "paul.walmsley@...ive.com" <paul.walmsley@...ive.com>,
"palmer@...belt.com" <palmer@...belt.com>, "aou@...s.berkeley.edu"
<aou@...s.berkeley.edu>, "alex@...ti.fr" <alex@...ti.fr>,
"agordeev@...ux.ibm.com" <agordeev@...ux.ibm.com>,
"gerald.schaefer@...ux.ibm.com" <gerald.schaefer@...ux.ibm.com>,
"hca@...ux.ibm.com" <hca@...ux.ibm.com>, "gor@...ux.ibm.com"
<gor@...ux.ibm.com>, "borntraeger@...ux.ibm.com" <borntraeger@...ux.ibm.com>,
"svens@...ux.ibm.com" <svens@...ux.ibm.com>, "dave.hansen@...ux.intel.com"
<dave.hansen@...ux.intel.com>, "luto@...nel.org" <luto@...nel.org>,
"peterz@...radead.org" <peterz@...radead.org>, "tglx@...utronix.de"
<tglx@...utronix.de>, "mingo@...hat.com" <mingo@...hat.com>, "bp@...en8.de"
<bp@...en8.de>, "x86@...nel.org" <x86@...nel.org>, "hpa@...or.com"
<hpa@...or.com>, "trondmy@...nel.org" <trondmy@...nel.org>, "anna@...nel.org"
<anna@...nel.org>, "hubcap@...ibond.com" <hubcap@...ibond.com>,
"martin@...ibond.com" <martin@...ibond.com>, "viro@...iv.linux.org.uk"
<viro@...iv.linux.org.uk>, "brauner@...nel.org" <brauner@...nel.org>,
"jack@...e.cz" <jack@...e.cz>, "akpm@...ux-foundation.org"
<akpm@...ux-foundation.org>, "david@...hat.com" <david@...hat.com>,
"lorenzo.stoakes@...cle.com" <lorenzo.stoakes@...cle.com>,
"Liam.Howlett@...cle.com" <Liam.Howlett@...cle.com>, "vbabka@...e.cz"
<vbabka@...e.cz>, "rppt@...nel.org" <rppt@...nel.org>, "surenb@...gle.com"
<surenb@...gle.com>, "mhocko@...e.com" <mhocko@...e.com>, "ast@...nel.org"
<ast@...nel.org>, "daniel@...earbox.net" <daniel@...earbox.net>,
"andrii@...nel.org" <andrii@...nel.org>, "martin.lau@...ux.dev"
<martin.lau@...ux.dev>, "eddyz87@...il.com" <eddyz87@...il.com>,
"song@...nel.org" <song@...nel.org>, "yonghong.song@...ux.dev"
<yonghong.song@...ux.dev>, "john.fastabend@...il.com"
<john.fastabend@...il.com>, "kpsingh@...nel.org" <kpsingh@...nel.org>,
"sdf@...ichev.me" <sdf@...ichev.me>, "haoluo@...gle.com" <haoluo@...gle.com>,
"jolsa@...nel.org" <jolsa@...nel.org>, "jgg@...pe.ca" <jgg@...pe.ca>,
"jhubbard@...dia.com" <jhubbard@...dia.com>, "peterx@...hat.com"
<peterx@...hat.com>, "jannh@...gle.com" <jannh@...gle.com>,
"pfalcato@...e.de" <pfalcato@...e.de>, "axelrasmussen@...gle.com"
<axelrasmussen@...gle.com>, "yuanchu@...gle.com" <yuanchu@...gle.com>,
"weixugc@...gle.com" <weixugc@...gle.com>, "hannes@...xchg.org"
<hannes@...xchg.org>, "zhengqi.arch@...edance.com"
<zhengqi.arch@...edance.com>, "shakeel.butt@...ux.dev"
<shakeel.butt@...ux.dev>, "shuah@...nel.org" <shuah@...nel.org>,
"seanjc@...gle.com" <seanjc@...gle.com>, "linux-fsdevel@...r.kernel.org"
<linux-fsdevel@...r.kernel.org>, "linux-doc@...r.kernel.org"
<linux-doc@...r.kernel.org>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>, "kvmarm@...ts.linux.dev"
<kvmarm@...ts.linux.dev>, "loongarch@...ts.linux.dev"
<loongarch@...ts.linux.dev>, "linux-riscv@...ts.infradead.org"
<linux-riscv@...ts.infradead.org>, "linux-s390@...r.kernel.org"
<linux-s390@...r.kernel.org>, "linux-nfs@...r.kernel.org"
<linux-nfs@...r.kernel.org>, "devel@...ts.orangefs.org"
<devel@...ts.orangefs.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>,
"bpf@...r.kernel.org" <bpf@...r.kernel.org>,
"linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>
Subject: [PATCH v6 10/11] KVM: selftests: cover GUEST_MEMFD_FLAG_NO_DIRECT_MAP
in existing selftests
Extend mem conversion selftests to cover the scenario that the guest can
fault in and write gmem-backed guest memory even if its direct map
removed. Also cover the new flag in guest_memfd_test.c tests.
Signed-off-by: Patrick Roy <roypat@...zon.co.uk>
---
tools/testing/selftests/kvm/guest_memfd_test.c | 2 ++
.../selftests/kvm/x86/private_mem_conversions_test.c | 7 ++++---
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
index b3ca6737f304..1187438b6831 100644
--- a/tools/testing/selftests/kvm/guest_memfd_test.c
+++ b/tools/testing/selftests/kvm/guest_memfd_test.c
@@ -275,6 +275,8 @@ static void test_guest_memfd(unsigned long vm_type)
if (vm_check_cap(vm, KVM_CAP_GUEST_MEMFD_MMAP))
flags |= GUEST_MEMFD_FLAG_MMAP;
+ if (vm_check_cap(vm, KVM_CAP_GUEST_MEMFD_NO_DIRECT_MAP))
+ flags |= GUEST_MEMFD_FLAG_NO_DIRECT_MAP;
test_create_guest_memfd_multiple(vm);
test_create_guest_memfd_invalid_sizes(vm, flags, page_size);
diff --git a/tools/testing/selftests/kvm/x86/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86/private_mem_conversions_test.c
index 82a8d88b5338..8427d9fbdb23 100644
--- a/tools/testing/selftests/kvm/x86/private_mem_conversions_test.c
+++ b/tools/testing/selftests/kvm/x86/private_mem_conversions_test.c
@@ -367,7 +367,7 @@ static void *__test_mem_conversions(void *__vcpu)
}
static void test_mem_conversions(enum vm_mem_backing_src_type src_type, uint32_t nr_vcpus,
- uint32_t nr_memslots)
+ uint32_t nr_memslots, uint64_t gmem_flags)
{
/*
* Allocate enough memory so that each vCPU's chunk of memory can be
@@ -394,7 +394,7 @@ static void test_mem_conversions(enum vm_mem_backing_src_type src_type, uint32_t
vm_enable_cap(vm, KVM_CAP_EXIT_HYPERCALL, (1 << KVM_HC_MAP_GPA_RANGE));
- memfd = vm_create_guest_memfd(vm, memfd_size, 0);
+ memfd = vm_create_guest_memfd(vm, memfd_size, gmem_flags);
for (i = 0; i < nr_memslots; i++)
vm_mem_add(vm, src_type, BASE_DATA_GPA + slot_size * i,
@@ -477,7 +477,8 @@ int main(int argc, char *argv[])
}
}
- test_mem_conversions(src_type, nr_vcpus, nr_memslots);
+ test_mem_conversions(src_type, nr_vcpus, nr_memslots, 0);
+ test_mem_conversions(src_type, nr_vcpus, nr_memslots, GUEST_MEMFD_FLAG_NO_DIRECT_MAP);
return 0;
}
--
2.50.1
Powered by blists - more mailing lists