linux_dsm_epyc7002/arch/x86
Paolo Bonzini 56871d444b KVM: x86: fix overlap between SPTE_MMIO_MASK and generation
The SPTE_MMIO_MASK overlaps with the bits used to track MMIO
generation number.  A high enough generation number would overwrite the
SPTE_SPECIAL_MASK region and cause the MMIO SPTE to be misinterpreted.

Likewise, setting bits 52 and 53 would also cause an incorrect generation
number to be read from the PTE, though this was partially mitigated by the
(useless if it weren't for the bug) removal of SPTE_SPECIAL_MASK from
the spte in get_mmio_spte_generation.  Drop that removal, and replace
it with a compile-time assertion.

Fixes: 6eeb4ef049 ("KVM: x86: assign two bits to track SPTE kinds")
Reported-by: Ben Gardon <bgardon@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-01-23 09:50:34 +01:00
..
boot x86/boot: kbuild: allow readelf executable to be specified 2019-12-14 15:53:04 +09:00
configs x86: Remove the calgary IOMMU driver 2019-11-15 10:36:59 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-12-02 17:23:21 -08:00
entry Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-12-01 19:05:07 -08:00
events perf/x86/intel: Fix PT PMI handling 2019-12-17 13:32:46 +01:00
hyperv - Support for new VMBus protocols (Andrea Parri). 2019-11-30 14:50:51 -08:00
ia32 syscalls/x86: Use COMPAT_SYSCALL_DEFINE0 for IA32 (rt_)sigreturn 2019-10-11 12:49:18 +02:00
include KVM: x86: Add dedicated emulator helpers for querying CPUID features 2020-01-21 13:58:22 +01:00
kernel Merge branch 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-12-21 06:04:12 -08:00
kvm KVM: x86: fix overlap between SPTE_MMIO_MASK and generation 2020-01-23 09:50:34 +01:00
lib perf/core improvements and fixes: 2019-11-29 06:56:05 +01:00
math-emu Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
mm mm/memory_hotplug: shrink zones when offlining memory 2020-01-04 13:55:08 -08:00
net bpf: Simplify __bpf_arch_text_poke poke type handling 2019-11-24 17:12:11 -08:00
oprofile x86: Use pr_warn instead of pr_warning 2019-10-18 15:00:18 +02:00
pci pci-v5.5-changes 2019-12-03 13:58:22 -08:00
platform x86/efi: Update e820 with reserved EFI boot services data to fix kexec breakage 2019-12-04 11:15:30 +01:00
power x86/asm/32: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 12:03:43 +02:00
purgatory Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
ras RAS/CEC: Add CONFIG_RAS_CEC_DEBUG and move CEC debug features there 2019-06-08 17:39:24 +02:00
realmode Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 10:42:40 -08:00
tools x86/insn: Fix awk regexp warnings 2019-10-01 12:13:16 +02:00
um y2038: syscall implementation cleanups 2019-12-01 14:00:59 -08:00
video treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
xen Merge branch 'x86-iopl-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 11:12:02 -08:00
.gitignore
Kbuild treewide: Add SPDX license identifier - Kbuild 2019-05-30 11:32:33 -07:00
Kconfig x86/kasan: support KASAN_VMALLOC 2019-12-01 12:59:06 -08:00
Kconfig.cpu x86/math-emu: Limit MATH_EMULATION to 486SX compatibles 2019-10-03 10:51:17 +02:00
Kconfig.debug x86/traps: Disentangle the 32-bit and 64-bit doublefault code 2019-11-26 21:53:34 +01:00
Makefile x86/build: Add -Wnoaddress-of-packed-member to REALMODE_CFLAGS, to silence GCC9 build warning 2019-08-28 17:31:31 +02:00
Makefile_32.cpu x86/math-emu: Limit MATH_EMULATION to 486SX compatibles 2019-10-03 10:51:17 +02:00
Makefile.um