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Update to 4.3.1

This commit is contained in:
Ben Hutchings 2015-12-09 23:48:47 +00:00
parent 2ba9bb2d09
commit 26e03c2621
4 changed files with 7 additions and 74 deletions
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7
debian/changelog vendored
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@ -1,3 +1,10 @@
linux (4.3.1-1~exp1) UNRELEASED; urgency=medium
* New upstream stable update:
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.1
-- Ben Hutchings <ben@decadent.org.uk> Wed, 09 Dec 2015 23:20:32 +0000
linux (4.3-1~exp2) experimental; urgency=medium
[ Ben Hutchings ]

38
debian/patches/bugfix/x86/kvm-x86-svm-intercept-ac-to-avoid-guest-host-exploit.patch vendored
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@ -1,38 +0,0 @@
Subject: KVM x86 SVM: intercept #AC to avoid guest->host exploit
---
M arch/x86/kvm/svm.c
1 file changed, 8 insertions(+), 0 deletions(-)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1106,6 +1106,7 @@ static void init_vmcb(struct vcpu_svm *s
set_exception_intercept(svm, PF_VECTOR);
set_exception_intercept(svm, UD_VECTOR);
set_exception_intercept(svm, MC_VECTOR);
+ set_exception_intercept(svm, AC_VECTOR);
set_intercept(svm, INTERCEPT_INTR);
set_intercept(svm, INTERCEPT_NMI);
@@ -1795,6 +1796,12 @@ static int ud_interception(struct vcpu_s
return 1;
}
+static int ac_interception(struct vcpu_svm *svm)
+{
+ kvm_queue_exception_e(&svm->vcpu, AC_VECTOR, 0);
+ return 1;
+}
+
static void svm_fpu_activate(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
@@ -3369,6 +3376,7 @@ static int (*const svm_exit_handlers[])(
[SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
[SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception,
[SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception,
+ [SVM_EXIT_EXCP_BASE + AC_VECTOR] = ac_interception,
[SVM_EXIT_INTR] = intr_interception,
[SVM_EXIT_NMI] = nmi_interception,
[SVM_EXIT_SMI] = nop_on_interception,

34
debian/patches/bugfix/x86/kvm-x86-vmx-avoid-guest-host-dos-by-intercepting-ac.patch vendored
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@ -1,34 +0,0 @@
From: Eric Northup <digitaleric@google.com>
Date: Thu Sep 10 11:36:28 2015 -0700
Subject: KVM x86 vmx: avoid guest->host DOS by intercepting #AC
A pathological (or malicious) guest can hang a host core by
mis-configuring its GDT/IDT and enabling alignment checks.
[bwh: Forward-ported to 4.2: AC_VECTOR is already defined so don't add it]
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1567,7 +1567,7 @@ static void update_exception_bitmap(stru
u32 eb;
eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) |
- (1u << NM_VECTOR) | (1u << DB_VECTOR);
+ (1u << NM_VECTOR) | (1u << DB_VECTOR) | (1u << AC_VECTOR);
if ((vcpu->guest_debug &
(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) ==
(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP))
@@ -5146,6 +5146,13 @@ static int handle_exception(struct kvm_v
kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip;
kvm_run->debug.arch.exception = ex_no;
break;
+ case AC_VECTOR:
+ /*
+ * We have already enabled interrupts and pre-emption, so
+ * it's OK to loop here if that is what will happen.
+ */
+ kvm_queue_exception_e(vcpu, AC_VECTOR, error_code);
+ return 1;
default:
kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
kvm_run->ex.exception = ex_no;

2
debian/patches/series vendored
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@ -87,8 +87,6 @@ bugfix/all/selftests-vm-try-harder-to-allocate-huge-pages.patch
bugfix/all/selftests-breakpoints-actually-build-it.patch
bugfix/all/rds-fix-race-condition-when-sending-a-message-on-unbound-socket.patch
bugfix/all/media-media-vivid-osd-fix-info-leak-in-ioctl.patch
bugfix/x86/kvm-x86-vmx-avoid-guest-host-dos-by-intercepting-ac.patch
bugfix/x86/kvm-x86-svm-intercept-ac-to-avoid-guest-host-exploit.patch
bugfix/x86/kvm-svm-unconditionally-intercept-DB.patch
bugfix/x86/kvm-x86-rename-update_db_bp_intercept-to-update_bp_i.patch
bugfix/all/usbvision-fix-overflow-of-interfaces-array.patch