linux-kernel - [PATCH 1/6] kvm: pass error code to handler

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-next>] [day] [month] [year] [list]

Date:	Fri, 16 Jul 2010 10:12:53 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>, kvm@...r.kernel.org,
	Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>
Subject: [PATCH 1/6] kvm: pass error code to handler

handle_ept_violation() does not pass error code to
the handler tdp_page_fault().

It means tdp_page_fault() handles the page fault with ignoring
the error code, It will not handle the page fault completely correctly,
and may causes endless page fault.

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
---
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 856e427..b40731e 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3521,7 +3521,8 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu)
 
 	gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
 	trace_kvm_page_fault(gpa, exit_qualification);
-	return kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0);
+	return kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK,
+			exit_qualification & 0x2);
 }
 
 static u64 ept_rsvd_mask(u64 spte, int level)
--
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/