[4.9,73/78] KVM: arm64: Fix exclusive limit for IPA size

Message ID	20210315135214.454159692@linuxfoundation.org
State	New
Headers	show Return-Path: <stable-owner@kernel.org> From: gregkh@linuxfoundation.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, stable@vger.kernel.org, Eric Auger <eric.auger@redhat.com>, Marc Zyngier <maz@kernel.org>, Andrew Jones <drjones@redhat.com> Subject: [PATCH 4.9 73/78] KVM: arm64: Fix exclusive limit for IPA size Date: Mon, 15 Mar 2021 14:52:36 +0100 Message-Id: <20210315135214.454159692@linuxfoundation.org> In-Reply-To: <20210315135212.060847074@linuxfoundation.org> References: <20210315135212.060847074@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	None \| expand [4.9,03/78] ath9k: fix transmitting to stations in dynamic SMPS mode [4.9,04/78] net: Fix gro aggregation for udp encaps with zero csum [4.9,05/78] net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0 [4.9,06/78] can: skb: can_skb_set_owner(): fix ref counting if socket was closed before setting s... [4.9,12/78] net/mlx4_en: update moderation when config reset [4.9,13/78] net: sched: avoid duplicates in classes dump [4.9,15/78] net: davicom: Fix regulator not turned off on failed probe [4.9,18/78] udf: fix silent AED tagLocation corruption [4.9,21/78] powerpc/perf: Record counter overflow always if SAMPLE_IP is unset [4.9,22/78] PCI: xgene-msi: Fix race in installing chained irq handler [4.9,23/78] s390/smp: __smp_rescan_cpus() - move cpumask away from stack [4.9,25/78] ALSA: hda/hdmi: Cancel pending works before suspend [4.9,27/78] ALSA: usb-audio: Fix "cannot get freq eq" errors on Dell AE515 sound bar [4.9,28/78] s390/dasd: fix hanging DASD driver unbind [4.9,32/78] usb: gadget: f_uac2: always increase endpoint max_packet_size by one audio slot [4.9,34/78] xhci: Improve detection of device initiated wake signal. [4.9,35/78] USB: serial: io_edgeport: fix memory leak in edge_startup [4.9,38/78] USB: serial: cp210x: add some more GE USB IDs [4.9,39/78] usbip: fix stub_dev to check for stream socket [4.9,43/78] usbip: fix vhci_hcd attach_store() races leading to gpf [4.9,45/78] staging: rtl8188eu: prevent ->ssid overflow in rtw_wx_set_scan() [4.9,46/78] staging: rtl8712: unterminated string leads to read overflow [4.9,47/78] staging: rtl8188eu: fix potential memory corruption in rtw_check_beacon_data() [4.9,48/78] staging: ks7010: prevent buffer overflow in ks_wlan_set_scan() [4.9,50/78] staging: rtl8192e: Fix possible buffer overflow in _rtl92e_wx_set_scan [4.9,51/78] staging: comedi: addi_apci_1032: Fix endian problem for COS sample [4.9,52/78] staging: comedi: addi_apci_1500: Fix endian problem for command sample [4.9,53/78] staging: comedi: adv_pci1710: Fix endian problem for AI command data [4.9,54/78] staging: comedi: das6402: Fix endian problem for AI command data [4.9,56/78] staging: comedi: dmm32at: Fix endian problem for AI command data [4.9,58/78] staging: comedi: pcl711: Fix endian problem for AI command data [4.9,59/78] staging: comedi: pcl818: Fix endian problem for AI command data [4.9,63/78] configfs: fix a use-after-free in __configfs_open_file [4.9,65/78] alpha: add $(src)/ rather than $(obj)/ to make source file path [4.9,66/78] alpha: merge build rules of division routines [4.9,67/78] alpha: make short build log available for division routines [4.9,68/78] alpha: Package string routines together [4.9,69/78] alpha: switch __copy_user() and __do_clean_user() to normal calling conventions [4.9,70/78] powerpc/64s: Fix instruction encoding for lis in ppc_function_entry() [4.9,72/78] hwmon: (lm90) Fix max6658 sporadic wrong temperature reading [4.9,73/78] KVM: arm64: Fix exclusive limit for IPA size [4.9,75/78] iio: imu: adis16400: fix memory leak [4.9,78/78] xen/events: avoid handling the same event on two cpus at the same time

Message ID

20210315135214.454159692@linuxfoundation.org

State

New

Headers

From: gregkh@linuxfoundation.org
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Eric Auger <eric.auger@redhat.com>,
	Marc Zyngier <maz@kernel.org>, Andrew Jones <drjones@redhat.com>
Subject: [PATCH 4.9 73/78] KVM: arm64: Fix exclusive limit for IPA size
Date: Mon, 15 Mar 2021 14:52:36 +0100
Message-Id: <20210315135214.454159692@linuxfoundation.org>
In-Reply-To: <20210315135212.060847074@linuxfoundation.org>
References: <20210315135212.060847074@linuxfoundation.org>
User-Agent: quilt/0.66
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

Series

None | expand

Commit Message

Greg KH March 15, 2021, 1:52 p.m. UTC

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

From: Marc Zyngier <maz@kernel.org>

Commit 262b003d059c6671601a19057e9fe1a5e7f23722 upstream.

When registering a memslot, we check the size and location of that
memslot against the IPA size to ensure that we can provide guest
access to the whole of the memory.

Unfortunately, this check rejects memslot that end-up at the exact
limit of the addressing capability for a given IPA size. For example,
it refuses the creation of a 2GB memslot at 0x8000000 with a 32bit
IPA space.

Fix it by relaxing the check to accept a memslot reaching the
limit of the IPA space.

Fixes: c3058d5da222 ("arm/arm64: KVM: Ensure memslots are within KVM_PHYS_SIZE")
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org # 4.4, 4.9
Reviewed-by: Andrew Jones <drjones@redhat.com>
Link: https://lore.kernel.org/r/20210311100016.3830038-3-maz@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/arm/kvm/mmu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -1834,7 +1834,7 @@  int kvm_arch_prepare_memory_region(struc
 	 * Prevent userspace from creating a memory region outside of the IPA
 	 * space addressable by the KVM guest IPA space.
 	 */
-	if (memslot->base_gfn + memslot->npages >=
+	if (memslot->base_gfn + memslot->npages >
 	    (KVM_PHYS_SIZE >> PAGE_SHIFT))
 		return -EFAULT;

[4.9,73/78] KVM: arm64: Fix exclusive limit for IPA size

Commit Message

Patch