AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-17 11:29:00 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
38ab012f10
linux_dsm_epyc7002/arch/x86/kvm
History
Wanpeng Li 38ab012f10 KVM: LAPIC: Fix pv ipis use-before-initialization 
Reported by syzkaller:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000014
 PGD 800000040410c067 P4D 800000040410c067 PUD 40410d067 PMD 0
 Oops: 0000 [#1] PREEMPT SMP PTI
 CPU: 3 PID: 2567 Comm: poc Tainted: G           OE     4.19.0-rc5 #16
 RIP: 0010:kvm_pv_send_ipi+0x94/0x350 [kvm]
 Call Trace:
  kvm_emulate_hypercall+0x3cc/0x700 [kvm]
  handle_vmcall+0xe/0x10 [kvm_intel]
  vmx_handle_exit+0xc1/0x11b0 [kvm_intel]
  vcpu_enter_guest+0x9fb/0x1910 [kvm]
  kvm_arch_vcpu_ioctl_run+0x35c/0x610 [kvm]
  kvm_vcpu_ioctl+0x3e9/0x6d0 [kvm]
  do_vfs_ioctl+0xa5/0x690
  ksys_ioctl+0x6d/0x80
  __x64_sys_ioctl+0x1a/0x20
  do_syscall_64+0x83/0x6e0
  entry_SYSCALL_64_after_hwframe+0x49/0xbe

The reason is that the apic map has not yet been initialized, the testcase
triggers pv_send_ipi interface by vmcall which results in kvm->arch.apic_map
is dereferenced. This patch fixes it by checking whether or not apic map is
NULL and bailing out immediately if that is the case.

Fixes: 4180bf1b65 (KVM: X86: Implement "send IPI" hypercall)
Reported-by: Wei Wu <ww9210@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Wei Wu <ww9210@gmail.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-11-27 12:48:56 +01:00
..
cpuid.c KVM: X86: Implement "send IPI" hypercall 2018-08-06 17:59:20 +02:00
cpuid.h KVM/x86: Update the reverse_cpuid list to include CPUID_7_EDX 2018-02-03 23:06:51 +01:00
debugfs.c kvm: x86: export TSC information to user-space 2016-09-16 16:57:48 +02:00
emulate.c x86: Clean up 'sizeof x' => 'sizeof(x)' 2018-10-29 07:13:28 +01:00
hyperv.c x86/kvm/hyperv: don't clear VP assist pages on init 2018-10-17 00:30:17 +02:00
hyperv.h KVM: hyperv: define VP assist page helpers 2018-10-17 00:30:13 +02:00
i8254.c KVM: x86: take slots_lock in kvm_free_pit 2017-07-12 22:38:26 +02:00
i8254.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
i8259.c KVM: x86: simplify pic_ioport_read() 2017-04-12 20:17:15 +02:00
ioapic.c KVM: x86: ioapic: Preserve read-only values in the redirection table 2017-11-17 13:20:21 +01:00
ioapic.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
irq_comm.c KVM: x86: don't hold kvm->lock in KVM_SET_GSI_ROUTING 2017-05-02 14:45:45 +02:00
irq.c KVM: x86: Rename interrupt.pending to interrupt.injected 2018-03-28 22:47:06 +02:00
irq.h KVM: x86: don't hold kvm->lock in KVM_SET_GSI_ROUTING 2017-05-02 14:45:45 +02:00
Kconfig x86/kvm/Kconfig: Ensure CRYPTO_DEV_CCP_DD state at minimum matches KVM_AMD 2018-07-15 17:36:57 +02:00
kvm_cache_regs.h KVM: nVMX: Do not load EOI-exitmap while running L2 2018-03-21 14:16:44 +01:00
lapic.c KVM: LAPIC: Fix pv ipis use-before-initialization 2018-11-27 12:48:56 +01:00
lapic.h KVM: hyperv: define VP assist page helpers 2018-10-17 00:30:13 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmu_audit.c x86/kvm/mmu: make vcpu->mmu a pointer to the current MMU 2018-10-17 00:30:02 +02:00
mmu.c KVM updates for v4.20 2018-10-25 17:57:35 -07:00
mmu.h x86/kvm/mmu: make vcpu->mmu a pointer to the current MMU 2018-10-17 00:30:02 +02:00
mmutrace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mtrr.c KVM: x86: generalize guest_cpuid_has_ helpers 2017-08-07 16:11:50 +02:00
page_track.c treewide: kvzalloc() -> kvcalloc() 2018-06-12 16:19:22 -07:00
paging_tmpl.h x86/kvm/mmu: make vcpu->mmu a pointer to the current MMU 2018-10-17 00:30:02 +02:00
pmu_amd.c KVM: x86: Add support for AMD Core Perf Extension in guest 2018-03-16 22:01:28 +01:00
pmu_intel.c KVM: x86/vPMU: fix undefined shift in intel_pmu_refresh() 2017-05-19 19:59:27 +02:00
pmu.c KVM: x86: Add support for VMware backdoor Pseudo-PMCs 2018-03-16 22:02:01 +01:00
pmu.h KVM: x86: Add support for VMware backdoor Pseudo-PMCs 2018-03-16 22:02:01 +01:00
svm.c KVM updates for v4.20 2018-10-25 17:57:35 -07:00
trace.h KVM: x86: hyperv: implement PV IPI send hypercalls 2018-10-17 00:29:47 +02:00
tss.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vmx_evmcs.h x86/kvm: use Enlightened VMCS when running on Hyper-V 2018-03-28 22:47:06 +02:00
vmx_shadow_fields.h x86/kvm/nVMX: tweak shadow fields 2018-10-19 18:45:14 +02:00
vmx.c KVM: VMX: re-add ple_gap module parameter 2018-11-27 12:48:43 +01:00
x86.c x86: Clean up 'sizeof x' => 'sizeof(x)' 2018-10-29 07:13:28 +01:00
x86.h kvm: x86: Defer setting of CR2 until #PF delivery 2018-10-17 19:07:43 +02:00