Sean Christopherson 9c177eee11 x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails ... commit daf972118c upstream. Check for a valid hv_vp_index array prior to derefencing hv_vp_index when setting Hyper-V's TSC change callback. If Hyper-V setup failed in hyperv_init(), the kernel will still report that it's running under Hyper-V, but will have silently disabled nearly all functionality. BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] SMP CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc2+ #75 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:set_hv_tscchange_cb+0x15/0xa0 Code: <8b> 04 82 8b 15 12 17 85 01 48 c1 e0 20 48 0d ee 00 01 00 f6 c6 08 ... Call Trace: kvm_arch_init+0x17c/0x280 kvm_init+0x31/0x330 vmx_init+0xba/0x13a do_one_initcall+0x41/0x1c0 kernel_init_freeable+0x1f2/0x23b kernel_init+0x16/0x120 ret_from_fork+0x22/0x30 Fixes: 93286261de ("x86/hyperv: Reenlightenment notifications support") Cc: stable@vger.kernel.org Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Link: https://lore.kernel.org/r/20211104182239.1302956-2-seanjc@google.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-11-26 10:39:19 +01:00
..
boot	x86/boot/compressed/64: Check SEV encryption in the 32-bit boot-path	2021-05-26 12:06:57 +02:00
configs	* A defconfig fix, from Daniel Díaz.	2020-09-20 15:06:43 -07:00
crypto	crypto: x86/curve25519 - fix cpu feature checking logic in mod_exit	2021-07-14 16:56:06 +02:00
entry	x86/sev: Split up runtime #VC handler for correct state tracking	2021-07-14 16:56:09 +02:00
events	perf/x86/intel/uncore: Fix IIO event constraints for Skylake Server	2021-11-26 10:39:18 +01:00
hyperv	x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails	2021-11-26 10:39:19 +01:00
ia32	x86: remove address space overrides using set_fs()	2020-09-08 22:21:36 -04:00
include	x86/iopl: Fake iopl(3) CLI/STI usage	2021-11-21 13:46:36 +01:00
kernel	x86/iopl: Fake iopl(3) CLI/STI usage	2021-11-21 13:46:36 +01:00
kvm	KVM: nVMX: Query current VMCS when determining if MSR bitmaps are in use	2021-11-18 14:03:48 +01:00
lib	x86/iopl: Fake iopl(3) CLI/STI usage	2021-11-21 13:46:36 +01:00
math-emu	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
mm	x86/sev: Make the #VC exception stacks part of the default stacks storage	2021-11-18 14:04:32 +01:00
net	bpf: Handle return value of BPF_PROG_TYPE_STRUCT_OPS prog	2021-10-06 15:55:50 +02:00
oprofile
pci	PCI: Add AMD RS690 quirk to enable 64-bit DMA	2021-06-30 08:47:23 -04:00
platform	x86/platform/olpc: Correct ifdef symbol to intended CONFIG_OLPC_XO15_SCI	2021-10-13 10:04:30 +02:00
power	PM: hibernate: x86: Use crc32 instead of md5 for hibernation e820 integrity check	2021-05-14 09:50:21 +02:00
purgatory	treewide: Convert macro and uses of __section(foo) to __section("foo")	2020-10-25 14:51:49 -07:00
ras
realmode	x86/head/64: Don't call verify_cpu() on starting APs	2020-09-09 11:33:20 +02:00
tools	x86/tools: Fix objdump version check again	2021-08-18 08:59:15 +02:00
um	arch/um: partially revert the conversion to __section() macro	2020-10-26 15:39:37 -07:00
video
xen	xen/x86: prevent PVH type from getting clobbered	2021-10-27 09:56:46 +02:00
.gitignore
Kbuild
Kconfig	x86/sev: Add an x86 version of cc_platform_has()	2021-11-18 14:04:32 +01:00
Kconfig.assembler
Kconfig.cpu
Kconfig.debug	x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()	2020-10-06 11:18:04 +02:00
Makefile	x86/build: Propagate $(CLANG_FLAGS) to $(REALMODE_FLAGS)	2021-05-11 14:47:18 +02:00
Makefile_32.cpu
Makefile.um