linux-kernel - [PATCH] KVM: MMU: fix the condition of syncing a new shadow page

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]

Date:	Mon, 24 Oct 2011 15:21:19 +0800
From:	Zhao Jin <cronozhj@...il.com>
To:	avi@...hat.com, mtosatti@...hat.com
Cc:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: [PATCH] KVM: MMU: fix the condition of syncing a new shadow page

Should be "or" since a new shadow page is synced if either it is
not leaf or there already exists another unsync shadow page with 
the same gfn.

Signed-off-by: Zhao Jin <cronozhj@...il.com>
---
 arch/x86/kvm/mmu.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index d7e1694..f36de41 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1698,7 +1698,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
 	if (!direct) {
 		if (rmap_write_protect(vcpu->kvm, gfn))
 			kvm_flush_remote_tlbs(vcpu->kvm);
-		if (level > PT_PAGE_TABLE_LEVEL && need_sync)
+		if (level > PT_PAGE_TABLE_LEVEL || need_sync)
 			kvm_sync_pages(vcpu, gfn);
 
 		account_shadowed(vcpu->kvm, gfn);
-- 
1.7.5.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/