Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-12-29 17:25:38 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
9b42d1e8e4
linux-stable/arch/x86
History
Sean Christopherson 9b42d1e8e4 KVM: x86: Play nice with protected guests in complete_hypercall_exit() 
Use is_64_bit_hypercall() instead of is_64_bit_mode() to detect a 64-bit
hypercall when completing said hypercall.  For guests with protected state,
e.g. SEV-ES and SEV-SNP, KVM must assume the hypercall was made in 64-bit
mode as the vCPU state needed to detect 64-bit mode is unavailable.

Hacking the sev_smoke_test selftest to generate a KVM_HC_MAP_GPA_RANGE
hypercall via VMGEXIT trips the WARN:

  ------------[ cut here ]------------
  WARNING: CPU: 273 PID: 326626 at arch/x86/kvm/x86.h:180 complete_hypercall_exit+0x44/0xe0 [kvm]
  Modules linked in: kvm_amd kvm ... [last unloaded: kvm]
  CPU: 273 UID: 0 PID: 326626 Comm: sev_smoke_test Not tainted 6.12.0-smp--392e932fa0f3-feat #470
  Hardware name: Google Astoria/astoria, BIOS 0.20240617.0-0 06/17/2024
  RIP: 0010:complete_hypercall_exit+0x44/0xe0 [kvm]
  Call Trace:
   <TASK>
   kvm_arch_vcpu_ioctl_run+0x2400/0x2720 [kvm]
   kvm_vcpu_ioctl+0x54f/0x630 [kvm]
   __se_sys_ioctl+0x6b/0xc0
   do_syscall_64+0x83/0x160
   entry_SYSCALL_64_after_hwframe+0x76/0x7e
   </TASK>
  ---[ end trace 0000000000000000 ]---

Fixes: b5aead0064 ("KVM: x86: Assume a 64-bit hypercall for guests with protected state")
Cc: stable@vger.kernel.org
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Nikunj A Dadhania <nikunj@amd.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20241128004344.4072099-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
2024-12-19 17:47:51 -08:00
..
boot x86 cleanups for v6.13: 2024-11-19 14:46:39 -08:00
coco - Add new infrastructure for reading TDX metadata 2024-11-22 13:07:19 -08:00
configs tinyconfig: remove unnecessary 'is not set' for choice blocks 2024-09-01 20:34:38 +09:00
crypto This update includes the following changes: 2024-11-19 10:28:41 -08:00
entry - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
events perf/core: Correct perf sampling with guest VMs 2024-11-14 10:40:01 +01:00
hyperv hyperv-next for v6.12 2024-09-19 08:15:30 +02:00
ia32
include KVM: SVM: Disable AVIC on SNP-enabled system without HvInUseWrAllowed feature 2024-12-19 17:47:51 -08:00
kernel x86: fix off-by-one in access_ok() 2024-11-25 12:19:05 -08:00
kvm KVM: x86: Play nice with protected guests in complete_hypercall_exit() 2024-12-19 17:47:51 -08:00
lib x86: fix user address masking non-canonical speculation issue 2024-10-25 09:53:03 -07:00
math-emu x86/math-emu: Fix function cast warnings 2024-04-08 16:06:22 +02:00
mm - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
net bpf, x86: Propagate tailcall info only for subprogs 2024-11-12 17:24:03 -08:00
pci Merge branch 'pci/thunderbolt' 2024-11-25 13:40:55 -06:00
platform EFI updates for v6.13 2024-11-20 14:13:28 -08:00
power - Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min 2024-03-14 18:03:09 -07:00
purgatory Kbuild updates for v6.10 2024-05-18 12:39:20 -07:00
ras
realmode Makefile: remove redundant tool coverage variables 2024-05-14 23:35:48 +09:00
tools First step of consolidating the VDSO data page handling: 2024-11-19 16:09:13 -08:00
um This pull request contains the following changes for UML: 2024-09-27 12:48:48 -07:00
video arch: Fix name collision with ACPI's video.o 2024-05-20 21:17:06 +00:00
virt - Do the proper memory conversion of guest memory in order to be able to kexec 2024-11-19 12:21:35 -08:00
xen x86/xen: Avoid relocatable quantities in Xen ELF notes 2024-10-29 17:23:36 +01:00
.gitignore
Kbuild x86/build: Use obj-y to descend into arch/x86/virt/ 2024-03-30 10:41:49 +01:00
Kconfig - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
Kconfig.assembler x86/kconfig: Add as-instr64 macro to properly evaluate AS_WRUSS 2024-06-20 19:48:18 +02:00
Kconfig.cpu x86/Kconfig: Transmeta Crusoe is CPU family 5, not 6 2024-02-09 16:28:19 +01:00
Kconfig.debug x86/kconfig: Select ARCH_WANT_FRAME_POINTERS again when UNWINDER_FRAME_POINTER=y 2024-05-20 11:37:23 +02:00
Makefile x86/stackprotector: Work around strict Clang TLS symbol requirements 2024-11-08 13:16:00 +01:00
Makefile_32.cpu
Makefile.postlink kbuild: remove ARCH_POSTLINK from module builds 2023-10-28 21:10:08 +09:00
Makefile.um arch: um: rust: Use the generated target.json again 2024-07-03 12:22:11 +02:00