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541e886f79
linux/arch/x86
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Wanpeng Li 541e886f79 KVM: nVMX: Fix using __this_cpu_read() in preemptible context 
BUG: using __this_cpu_read() in preemptible [00000000] code: qemu-system-x86/4590
  caller is nested_vmx_enter_non_root_mode+0xebd/0x1790 [kvm_intel]
  CPU: 4 PID: 4590 Comm: qemu-system-x86 Tainted: G           OE     5.1.0-rc4+ #1
  Call Trace:
   dump_stack+0x67/0x95
   __this_cpu_preempt_check+0xd2/0xe0
   nested_vmx_enter_non_root_mode+0xebd/0x1790 [kvm_intel]
   nested_vmx_run+0xda/0x2b0 [kvm_intel]
   handle_vmlaunch+0x13/0x20 [kvm_intel]
   vmx_handle_exit+0xbd/0x660 [kvm_intel]
   kvm_arch_vcpu_ioctl_run+0xa2c/0x1e50 [kvm]
   kvm_vcpu_ioctl+0x3ad/0x6d0 [kvm]
   do_vfs_ioctl+0xa5/0x6e0
   ksys_ioctl+0x6d/0x80
   __x64_sys_ioctl+0x1a/0x20
   do_syscall_64+0x6f/0x6c0
   entry_SYSCALL_64_after_hwframe+0x49/0xbe

Accessing per-cpu variable should disable preemption, this patch extends the
preemption disable region for __this_cpu_read().

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Fixes: 52017608da ("KVM: nVMX: add option to perform early consistency checks via H/W")
Cc: stable@vger.kernel.org
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-05-24 21:27:08 +02:00
..
boot Merge branch 'acpica' 2019-05-06 10:49:01 +02:00
configs x86/defconfig: Remove archaic partition tables support 2019-04-19 12:29:48 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-05-06 20:15:06 -07:00
entry Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-17 09:46:31 -07:00
events * ARM: support for SVE and Pointer Authentication in guests, PMU improvements 2019-05-17 10:33:30 -07:00
hyperv x86/hyperv: Make hv_vcpu_is_preempted() visible 2019-04-19 17:58:57 +02:00
ia32 Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-07 10:24:10 -07:00
include Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 10:23:24 -07:00
kernel treewide: prefix header search paths with $(srctree)/ 2019-05-18 11:49:57 +09:00
kvm KVM: nVMX: Fix using __this_cpu_read() in preemptible context 2019-05-24 21:27:08 +02:00
lib Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-06 16:31:44 -07:00
math-emu x86/fpu: Always init the state in fpu__clear() 2019-04-09 19:28:06 +02:00
mm Kbuild updates for v5.2 (2nd) 2019-05-19 11:53:58 -07:00
net bpf, x32: Fix bug for BPF_ALU64 | BPF_NEG 2019-05-01 23:40:47 +02:00
oprofile
pci x86/PCI: Fix PCI IRQ routing table memory leak 2019-04-17 15:27:03 -05:00
platform power supply and reset changes for the v5.2 series 2019-05-15 18:50:40 -07:00
power crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
purgatory
ras
realmode x86/realmode: Make set_real_mode_mem() static inline 2019-03-29 10:16:27 +01:00
tools Merge branch 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-06 15:56:41 -07:00
um audit/stable-5.2 PR 20190507 2019-05-07 19:06:04 -07:00
video
xen xen: fixes and features for 5.2-rc1 2019-05-15 18:44:52 -07:00
.gitignore
Kbuild
Kconfig Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-16 11:02:27 -07:00
Kconfig.cpu
Kconfig.debug compiler: allow all arches to enable CONFIG_OPTIMIZE_INLINING 2019-05-14 19:52:48 -07:00
Makefile x86/build: Keep local relocations with ld.lld 2019-04-05 12:34:35 +02:00
Makefile_32.cpu
Makefile.um