From: <gregkh@linuxfoundation.org>
To: marc.zyngier@arm.com, gregkh@linuxfoundation.org,
rmk+kernel@arm.linux.org.uk, will.deacon@arm.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "arm64: KVM: Fix host crash when injecting a fault into a 32bit guest" has been added to the 3.14-stable tree
Date: Fri, 11 Sep 2015 15:40:37 -0700 [thread overview]
Message-ID: <144201123716114@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
arm64: KVM: Fix host crash when injecting a fault into a 32bit guest
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-kvm-fix-host-crash-when-injecting-a-fault-into-a-32bit-guest.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From 126c69a0bd0e441bf6766a5d9bf20de011be9f68 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Thu, 27 Aug 2015 16:10:01 +0100
Subject: arm64: KVM: Fix host crash when injecting a fault into a 32bit guest
From: Marc Zyngier <marc.zyngier@arm.com>
commit 126c69a0bd0e441bf6766a5d9bf20de011be9f68 upstream.
When injecting a fault into a misbehaving 32bit guest, it seems
rather idiotic to also inject a 64bit fault that is only going
to corrupt the guest state. This leads to a situation where we
perform an illegal exception return at EL2 causing the host
to crash instead of killing the guest.
Just fix the stupid bug that has been there from day 1.
Reported-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm64/kvm/inject_fault.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- a/arch/arm64/kvm/inject_fault.c
+++ b/arch/arm64/kvm/inject_fault.c
@@ -168,8 +168,8 @@ void kvm_inject_dabt(struct kvm_vcpu *vc
{
if (!(vcpu->arch.hcr_el2 & HCR_RW))
inject_abt32(vcpu, false, addr);
-
- inject_abt64(vcpu, false, addr);
+ else
+ inject_abt64(vcpu, false, addr);
}
/**
@@ -184,8 +184,8 @@ void kvm_inject_pabt(struct kvm_vcpu *vc
{
if (!(vcpu->arch.hcr_el2 & HCR_RW))
inject_abt32(vcpu, true, addr);
-
- inject_abt64(vcpu, true, addr);
+ else
+ inject_abt64(vcpu, true, addr);
}
/**
@@ -198,6 +198,6 @@ void kvm_inject_undefined(struct kvm_vcp
{
if (!(vcpu->arch.hcr_el2 & HCR_RW))
inject_undef32(vcpu);
-
- inject_undef64(vcpu);
+ else
+ inject_undef64(vcpu);
}
Patches currently in stable-queue which might be from marc.zyngier@arm.com are
queue-3.14/arm64-kvm-fix-host-crash-when-injecting-a-fault-into-a-32bit-guest.patch
reply other threads:[~2015-09-11 22:40 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=144201123716114@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=marc.zyngier@arm.com \
--cc=rmk+kernel@arm.linux.org.uk \
--cc=stable-commits@vger.kernel.org \
--cc=stable@vger.kernel.org \
--cc=will.deacon@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).