Sean Christopherson f7782bb8d8 KVM: nVMX: Unconditionally clear nested.pi_pending on nested VM-Enter ... Clear nested.pi_pending on nested VM-Enter even if L2 will run without posted interrupts enabled. If nested.pi_pending is left set from a previous L2, vmx_complete_nested_posted_interrupt() will pick up the stale flag and exit to userspace with an "internal emulation error" due the new L2 not having a valid nested.pi_desc. Arguably, vmx_complete_nested_posted_interrupt() should first check for posted interrupts being enabled, but it's also completely reasonable that KVM wouldn't screw up a fundamental flag. Not to mention that the mere existence of nested.pi_pending is a long-standing bug as KVM shouldn't move the posted interrupt out of the IRR until it's actually processed, e.g. KVM effectively drops an interrupt when it performs a nested VM-Exit with a "pending" posted interrupt. Fixing the mess is a future problem. Prior to vmx_complete_nested_posted_interrupt() interpreting a null PI descriptor as an error, this was a benign bug as the null PI descriptor effectively served as a check on PI not being enabled. Even then, the new flow did not become problematic until KVM started checking the result of kvm_check_nested_events(). Fixes: 705699a139 ("KVM: nVMX: Enable nested posted interrupt processing") Fixes: 966eefb896 ("KVM: nVMX: Disable vmcs02 posted interrupts if vmcs12 PID isn't mappable") Fixes: 47d3530f86c0 ("KVM: x86: Exit to userspace when kvm_check_nested_events fails") Cc: stable@vger.kernel.org Cc: Jim Mattson <jmattson@google.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210810144526.2662272-1-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2021-08-13 03:35:17 -04:00
..
boot	Modernize the genimage.sh script, add a 'hdimage' target and EFI support.	2021-06-28 13:05:09 -07:00
configs
crypto	crypto: x86/curve25519 - fix cpu feature checking logic in mod_exit	2021-06-11 15:03:29 +08:00
entry	arch, mm: wire up memfd_secret system call where relevant	2021-07-08 11:48:21 -07:00
events	A fix and a hardware-enablement addition:	2021-07-11 11:10:48 -07:00
hyperv	Drivers: hv: Move Hyper-V extended capability check to arch neutral code	2021-06-05 10:22:34 +00:00
ia32	binfmt: remove in-tree usage of MAP_EXECUTABLE	2021-06-29 10:53:50 -07:00
include	KVM: x86: Move declaration of kvm_spurious_fault() to x86.h	2021-08-13 03:35:16 -04:00
kernel	Merge tag 'kvm-s390-master-5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD	2021-07-14 12:14:27 -04:00
kvm	KVM: nVMX: Unconditionally clear nested.pi_pending on nested VM-Enter	2021-08-13 03:35:17 -04:00
lib	- Differentiate the type of exception the #VC handler raises depending	2021-06-28 11:29:12 -07:00
math-emu	x86/math-emu: Rename frstor()	2021-06-23 18:16:33 +02:00
mm	mm: rename p4d_page_vaddr to p4d_pgtable and make it return pud_t *	2021-07-08 11:48:22 -07:00
net	bpf: Track subprog poke descriptors correctly and fix use-after-free	2021-07-09 12:08:27 +02:00
pci	pci-v5.14-changes	2021-07-08 12:06:20 -07:00
platform	EFI changes: two driver API cleanups, and a log message tweak.	2021-06-28 11:34:16 -07:00
power	- turn the stack canary into a normal __percpu variable on 32-bit which	2021-04-27 17:45:09 -07:00
purgatory	kernel.h: split out panic and oops helpers	2021-07-01 11:06:04 -07:00
ras
realmode	A single ELF format fix for a section flags mismatch bug that breaks	2021-06-28 11:35:55 -07:00
tools
um	x86/uml/syscalls: Remove array index from syscall initializers	2021-05-25 16:59:23 +02:00
video
xen	kernel.h: split out panic and oops helpers	2021-07-01 11:06:04 -07:00
.gitignore
Kbuild
Kconfig	Merge branch 'akpm' (patches from Andrew)	2021-07-02 12:08:10 -07:00
Kconfig.assembler
Kconfig.cpu
Kconfig.debug
Makefile	Kbuild updates for v5.14	2021-07-10 11:01:38 -07:00
Makefile_32.cpu
Makefile.um	um: allow not setting extra rpaths in the linux binary	2021-06-17 21:54:15 +02:00