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Maxim Levitsky 7c1c96ffb6 KVM: nSVM: avoid picking up unsupported bits from L2 in int_ctl (CVE-2021-3653) 
commit 0f923e0712 upstream.

* Invert the mask of bits that we pick from L2 in
  nested_vmcb02_prepare_control

* Invert and explicitly use VIRQ related bits bitmask in svm_clear_vintr

This fixes a security issue that allowed a malicious L1 to run L2 with
AVIC enabled, which allowed the L2 to exploit the uninitialized and enabled
AVIC to read/write the host physical memory at some offsets.

Fixes: 3d6368ef58 ("KVM: SVM: Add VMRUN handler")
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-18 08:57:04 +02:00
arch
KVM: nSVM: avoid picking up unsupported bits from L2 in int_ctl (CVE-2021-3653)
2021-08-18 08:57:04 +02:00
block
blk-iolatency: error out if blk_get_queue() failed in iolatency_set_limit()
2021-08-12 13:20:58 +02:00
certs
certs: Move load_system_certificate_list to a common function
2021-06-30 08:47:55 -04:00
crypto
crypto: shash - avoid comparing pointers to exported functions under CFI
2021-07-14 16:53:13 +02:00
Documentation
KVM: X86: MMU: Use the correct inherited permissions to get shadow page
2021-08-15 13:08:04 +02:00
drivers
iommu/vt-d: Fix agaw for a supported 48 bit guest address width
2021-08-18 08:57:04 +02:00
fs
ceph: take snap_empty_lock atomically with snaprealm refcount change
2021-08-18 08:57:04 +02:00
include
vmlinux.lds.h: Handle clang's module.{c,d}tor sections
2021-08-18 08:57:04 +02:00
init
kbuild: add CONFIG_LD_IS_LLD
2021-06-30 08:47:44 -04:00
ipc
ipc/util.c: sysvipc_find_ipc() incorrectly updates position index
2020-05-20 08:20:16 +02:00
kernel
genirq/timings: Prevent potential array overflow in __irq_timings_store()
2021-08-18 08:57:02 +02:00
lib
lib/decompress_unlz4.c: correctly handle zero-padding around initrds.
2021-07-20 16:10:46 +02:00
LICENSES
LICENSES: Rename other to deprecated
2019-05-03 06:34:32 -06:00
mm
mm: slab: fix kmem_cache_create failed when sysfs node not destroyed
2021-07-25 14:35:14 +02:00
net
vsock/virtio: avoid potential deadlock when vsock device remove
2021-08-18 08:57:01 +02:00
samples
samples/bpf: Fix the error return code of xdp_redirect's main()
2021-07-14 16:53:30 +02:00
scripts
scripts/tracing: fix the bug that can't parse raw_trace_func
2021-08-12 13:21:00 +02:00
security
smackfs: restrict bytes count in smk_set_cipso()
2021-07-19 08:53:18 +02:00
sound
ASoC: cs42l42: Fix LRCLK frame start edge
2021-08-18 08:56:58 +02:00
tools
bpf, selftests: Adjust few selftest result_unpriv outcomes
2021-08-12 13:21:04 +02:00
usr
initramfs: restore default compression behavior
2020-04-08 09:08:38 +02:00
virt
KVM: Do not leak memory for duplicate debugfs directories
2021-08-12 13:21:03 +02:00
.clang-format
clang-format: Update with the latest for_each macro list
2019-08-31 10:00:51 +02:00
.cocciconfig
scripts: add Linux .cocciconfig for coccinelle
2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
Opt out of scripts/get_maintainer.pl
2019-05-16 10:53:40 -07:00
.gitattributes
.gitattributes: set git diff driver for C source code files
2016-10-07 18:46:30 -07:00
.gitignore
Merge tag 'modules-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
2019-09-22 10:34:46 -07:00
.mailmap
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2019-11-10 13:41:59 -08:00
COPYING
COPYING: use the new text with points to the license files
2018-03-23 12:41:45 -06:00
CREDITS
MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer
2019-10-10 08:12:51 -07:00
Kbuild
kbuild: do not descend to ./Kbuild when cleaning
2019-08-21 21:03:58 +09:00
Kconfig
docs: kbuild: convert docs to ReST and rename to *.rst
2019-06-14 14:21:21 -06:00
MAINTAINERS
Documentation/llvm: add documentation on building w/ Clang/LLVM
2020-08-26 10:40:46 +02:00
Makefile
Linux 5.4.141
2021-08-15 13:08:06 +02:00
README
Drop all 00-INDEX files from Documentation/
2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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