linux-kernel - [PATCH 03/15] KVM: selftests: Align HVA for HugeTLB-backed memslots

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210210230625.550939-4-seanjc@google.com>
Date:   Wed, 10 Feb 2021 15:06:13 -0800
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sean Christopherson <seanjc@...gle.com>,
        Ben Gardon <bgardon@...gle.com>,
        Yanan Wang <wangyanan55@...wei.com>,
        Andrew Jones <drjones@...hat.com>,
        Peter Xu <peterx@...hat.com>,
        Aaron Lewis <aaronlewis@...gle.com>
Subject: [PATCH 03/15] KVM: selftests: Align HVA for HugeTLB-backed memslots

Align the HVA for HugeTLB memslots, not just THP memslots.  Add an
assert so any future backing types are forced to assess whether or not
they need to be aligned.

Cc: Ben Gardon <bgardon@...gle.com>
Cc: Yanan Wang <wangyanan55@...wei.com>
Cc: Andrew Jones <drjones@...hat.com>
Cc: Peter Xu <peterx@...hat.com>
Cc: Aaron Lewis <aaronlewis@...gle.com>
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 tools/testing/selftests/kvm/lib/kvm_util.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 584167c6dbc7..deaeb47b5a6d 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -731,8 +731,11 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm,
 	alignment = 1;
 #endif
 
-	if (src_type == VM_MEM_SRC_ANONYMOUS_THP)
+	if (src_type == VM_MEM_SRC_ANONYMOUS_THP ||
+	    src_type == VM_MEM_SRC_ANONYMOUS_HUGETLB)
 		alignment = max(huge_page_size, alignment);
+	else
+		ASSERT_EQ(src_type, VM_MEM_SRC_ANONYMOUS);
 
 	/* Add enough memory to align up if necessary */
 	if (alignment > 1)
-- 
2.30.0.478.g8a0d178c01-goog