Jim Mattson 018685461a kvm: LAPIC: Restore guard to prevent illegal APIC register access ...

[ Upstream commit 218bf772bd ]

Per the SDM, "any access that touches bytes 4 through 15 of an APIC
register may cause undefined behavior and must not be executed."
Worse, such an access in kvm_lapic_reg_read can result in a leak of
kernel stack contents. Prior to commit 01402cf810 ("kvm: LAPIC:
write down valid APIC registers"), such an access was explicitly
disallowed. Restore the guard that was removed in that commit.

Fixes: 01402cf810 ("kvm: LAPIC: write down valid APIC registers")
Signed-off-by: Jim Mattson <jmattson@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Message-Id: <20210602205224.3189316-1-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-06-23 14:42:41 +02:00

..

alpha

local64.h: make <asm/local64.h> mandatory

2021-01-12 20:18:16 +01:00

arc

ARC: mm: Use max_high_pfn as a HIGHMEM zone border

2021-05-19 10:13:10 +02:00

arm

ARM: OMAP2+: Fix build warning when mmc_omap is not built

2021-06-18 10:00:04 +02:00

arm64

KVM: arm64: Fix debug register indexing

2021-06-10 13:39:28 +02:00

c6x

Merge tag 'arch-cleanup-2020-10-22' of git://git.kernel.dk/linux-block

2020-10-23 10:06:38 -07:00

csky

csky: change a Kconfig symbol name to fix e1000 build error

2021-04-28 13:40:02 +02:00

h8300

h8300: fix PREEMPTION build, TI_PRE_COUNT undefined

2021-02-17 11:02:28 +01:00

hexagon

local64.h: make <asm/local64.h> mandatory

2021-01-12 20:18:16 +01:00

ia64

tweewide: Fix most Shebang lines

2021-05-22 11:40:55 +02:00

m68k

m68k: Add missing mmap_read_lock() to sys_cacheflush()

2021-05-14 09:50:19 +02:00

microblaze

local64.h: make <asm/local64.h> mandatory

2021-01-12 20:18:16 +01:00

mips

MIPS: Fix kernel hang under FUNCTION_GRAPH_TRACER and PREEMPT_TRACER

2021-06-16 12:01:37 +02:00

nds32

nds32: flush_dcache_page: use page_mapping_file to avoid races with swapoff

2021-04-14 08:41:58 +02:00

nios2

nios2: fixed broken sys_clone syscall

2021-03-04 11:38:16 +01:00

openrisc

openrisc: Define memory barrier mb

2021-06-03 09:00:44 +02:00

parisc

parisc: avoid a warning on u8 cast for cmpxchg on u8 pointers

2021-04-14 08:41:59 +02:00

powerpc

powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P1010 i2c controllers

2021-06-16 12:01:38 +02:00

riscv

riscv: Use -mno-relax when using lld linker

2021-06-18 10:00:04 +02:00

s390

KVM: s390: extend kvm_s390_shadow_fault to return entry pointer

2021-05-14 09:50:03 +02:00

sh

sh: Remove unused HAVE_COPY_THREAD_TLS macro

2021-01-27 11:55:20 +01:00

sparc

sparc64: Fix opcode filtering in handling of no fault loads

2021-03-30 14:31:50 +02:00

um

um: Disable CONFIG_GCOV with MODULES

2021-05-22 11:40:53 +02:00

x86

kvm: LAPIC: Restore guard to prevent illegal APIC register access

2021-06-23 14:42:41 +02:00

xtensa

xtensa: move coprocessor_flush to the .text section

2021-04-07 15:00:09 +02:00

.gitignore

…

Kconfig

fanotify: Fix sys_fanotify_mark() on native x86-32

2021-01-17 14:16:59 +01:00