Mike Krinkin 17e4bce0ae KVM: x86: MMU: fix ubsan index-out-of-range warning ... Ubsan reports the following warning due to a typo in update_accessed_dirty_bits template, the patch fixes the typo: [ 168.791851] ================================================================================ [ 168.791862] UBSAN: Undefined behaviour in arch/x86/kvm/paging_tmpl.h:252:15 [ 168.791866] index 4 is out of range for type 'u64 [4]' [ 168.791871] CPU: 0 PID: 2950 Comm: qemu-system-x86 Tainted: G O L 4.5.0-rc5-next-20160222 #7 [ 168.791873] Hardware name: LENOVO 23205NG/23205NG, BIOS G2ET95WW (2.55 ) 07/09/2013 [ 168.791876] 0000000000000000 ffff8801cfcaf208 ffffffff81c9f780 0000000041b58ab3 [ 168.791882] ffffffff82eb2cc1 ffffffff81c9f6b4 ffff8801cfcaf230 ffff8801cfcaf1e0 [ 168.791886] 0000000000000004 0000000000000001 0000000000000000 ffffffffa1981600 [ 168.791891] Call Trace: [ 168.791899] [<ffffffff81c9f780>] dump_stack+0xcc/0x12c [ 168.791904] [<ffffffff81c9f6b4>] ? _atomic_dec_and_lock+0xc4/0xc4 [ 168.791910] [<ffffffff81da9e81>] ubsan_epilogue+0xd/0x8a [ 168.791914] [<ffffffff81daafa2>] __ubsan_handle_out_of_bounds+0x15c/0x1a3 [ 168.791918] [<ffffffff81daae46>] ? __ubsan_handle_shift_out_of_bounds+0x2bd/0x2bd [ 168.791922] [<ffffffff811287ef>] ? get_user_pages_fast+0x2bf/0x360 [ 168.791954] [<ffffffffa1794050>] ? kvm_largepages_enabled+0x30/0x30 [kvm] [ 168.791958] [<ffffffff81128530>] ? __get_user_pages_fast+0x360/0x360 [ 168.791987] [<ffffffffa181b818>] paging64_walk_addr_generic+0x1b28/0x2600 [kvm] [ 168.792014] [<ffffffffa1819cf0>] ? init_kvm_mmu+0x1100/0x1100 [kvm] [ 168.792019] [<ffffffff8129e350>] ? debug_check_no_locks_freed+0x350/0x350 [ 168.792044] [<ffffffffa1819cf0>] ? init_kvm_mmu+0x1100/0x1100 [kvm] [ 168.792076] [<ffffffffa181c36d>] paging64_gva_to_gpa+0x7d/0x110 [kvm] [ 168.792121] [<ffffffffa181c2f0>] ? paging64_walk_addr_generic+0x2600/0x2600 [kvm] [ 168.792130] [<ffffffff812e848b>] ? debug_lockdep_rcu_enabled+0x7b/0x90 [ 168.792178] [<ffffffffa17d9a4a>] emulator_read_write_onepage+0x27a/0x1150 [kvm] [ 168.792208] [<ffffffffa1794d44>] ? __kvm_read_guest_page+0x54/0x70 [kvm] [ 168.792234] [<ffffffffa17d97d0>] ? kvm_task_switch+0x160/0x160 [kvm] [ 168.792238] [<ffffffff812e848b>] ? debug_lockdep_rcu_enabled+0x7b/0x90 [ 168.792263] [<ffffffffa17daa07>] emulator_read_write+0xe7/0x6d0 [kvm] [ 168.792290] [<ffffffffa183b620>] ? em_cr_write+0x230/0x230 [kvm] [ 168.792314] [<ffffffffa17db005>] emulator_write_emulated+0x15/0x20 [kvm] [ 168.792340] [<ffffffffa18465f8>] segmented_write+0xf8/0x130 [kvm] [ 168.792367] [<ffffffffa1846500>] ? em_lgdt+0x20/0x20 [kvm] [ 168.792374] [<ffffffffa14db512>] ? vmx_read_guest_seg_ar+0x42/0x1e0 [kvm_intel] [ 168.792400] [<ffffffffa1846d82>] writeback+0x3f2/0x700 [kvm] [ 168.792424] [<ffffffffa1846990>] ? em_sidt+0xa0/0xa0 [kvm] [ 168.792449] [<ffffffffa185554d>] ? x86_decode_insn+0x1b3d/0x4f70 [kvm] [ 168.792474] [<ffffffffa1859032>] x86_emulate_insn+0x572/0x3010 [kvm] [ 168.792499] [<ffffffffa17e71dd>] x86_emulate_instruction+0x3bd/0x2110 [kvm] [ 168.792524] [<ffffffffa17e6e20>] ? reexecute_instruction.part.110+0x2e0/0x2e0 [kvm] [ 168.792532] [<ffffffffa14e9a81>] handle_ept_misconfig+0x61/0x460 [kvm_intel] [ 168.792539] [<ffffffffa14e9a20>] ? handle_pause+0x450/0x450 [kvm_intel] [ 168.792546] [<ffffffffa15130ea>] vmx_handle_exit+0xd6a/0x1ad0 [kvm_intel] [ 168.792572] [<ffffffffa17f6a6c>] ? kvm_arch_vcpu_ioctl_run+0xbdc/0x6090 [kvm] [ 168.792597] [<ffffffffa17f6bcd>] kvm_arch_vcpu_ioctl_run+0xd3d/0x6090 [kvm] [ 168.792621] [<ffffffffa17f6a6c>] ? kvm_arch_vcpu_ioctl_run+0xbdc/0x6090 [kvm] [ 168.792627] [<ffffffff8293b530>] ? __ww_mutex_lock_interruptible+0x1630/0x1630 [ 168.792651] [<ffffffffa17f5e90>] ? kvm_arch_vcpu_runnable+0x4f0/0x4f0 [kvm] [ 168.792656] [<ffffffff811eeb30>] ? preempt_notifier_unregister+0x190/0x190 [ 168.792681] [<ffffffffa17e0447>] ? kvm_arch_vcpu_load+0x127/0x650 [kvm] [ 168.792704] [<ffffffffa178e9a3>] kvm_vcpu_ioctl+0x553/0xda0 [kvm] [ 168.792727] [<ffffffffa178e450>] ? vcpu_put+0x40/0x40 [kvm] [ 168.792732] [<ffffffff8129e350>] ? debug_check_no_locks_freed+0x350/0x350 [ 168.792735] [<ffffffff82946087>] ? _raw_spin_unlock+0x27/0x40 [ 168.792740] [<ffffffff8163a943>] ? handle_mm_fault+0x1673/0x2e40 [ 168.792744] [<ffffffff8129daa8>] ? trace_hardirqs_on_caller+0x478/0x6c0 [ 168.792747] [<ffffffff8129dcfd>] ? trace_hardirqs_on+0xd/0x10 [ 168.792751] [<ffffffff812e848b>] ? debug_lockdep_rcu_enabled+0x7b/0x90 [ 168.792756] [<ffffffff81725a80>] do_vfs_ioctl+0x1b0/0x12b0 [ 168.792759] [<ffffffff817258d0>] ? ioctl_preallocate+0x210/0x210 [ 168.792763] [<ffffffff8174aef3>] ? __fget+0x273/0x4a0 [ 168.792766] [<ffffffff8174acd0>] ? __fget+0x50/0x4a0 [ 168.792770] [<ffffffff8174b1f6>] ? __fget_light+0x96/0x2b0 [ 168.792773] [<ffffffff81726bf9>] SyS_ioctl+0x79/0x90 [ 168.792777] [<ffffffff82946880>] entry_SYSCALL_64_fastpath+0x23/0xc1 [ 168.792780] ================================================================================ Signed-off-by: Mike Krinkin <krinkin.m.u@gmail.com> Reviewed-by: Xiao Guangrong <guangrong.xiao@linux.intel.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2016-02-25 09:50:35 +01:00
..
boot	UBSAN: run-time undefined behavior sanity checker	2016-01-20 17:09:18 -08:00
configs	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2015-09-04 15:49:32 -07:00
crypto	crypto: chacha20-ssse3 - Align stack pointer to 64 bytes	2016-01-25 21:47:45 +08:00
entry	UBSAN: run-time undefined behavior sanity checker	2016-01-20 17:09:18 -08:00
ia32	Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-11-03 21:05:40 -08:00
include	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching	2016-02-18 16:34:15 -08:00
kernel	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-31 16:17:19 -08:00
kvm	KVM: x86: MMU: fix ubsan index-out-of-range warning	2016-02-25 09:50:35 +01:00
lguest	Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-11 16:26:03 -08:00
lib	Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-11 16:46:20 -08:00
math-emu	Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-11-03 21:05:40 -08:00
mm	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-02-14 10:50:26 -08:00
net	bpf, x86: detect/optimize loading 0 immediates	2015-12-18 16:04:51 -05:00
oprofile	x86/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'	2015-03-23 11:14:17 +01:00
pci	PCI changes for the v4.5 merge window:	2016-01-21 11:52:16 -08:00
platform	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-01-31 16:17:19 -08:00
power	x86/pm: Introduce quirk framework to save/restore extra MSR registers around suspend/resume	2015-11-26 10:04:53 +01:00
purgatory
ras	x86/ras/mce_amd_inj: Inject bank 4 errors on the NBC	2015-10-12 16:15:48 +02:00
realmode	UBSAN: run-time undefined behavior sanity checker	2016-01-20 17:09:18 -08:00
tools
um	virtio: barrier rework+fixes	2016-01-18 16:44:24 -08:00
video
xen	xen: features and fixes for 4.5-rc0	2016-01-12 13:05:36 -08:00
.gitignore
Kbuild	x86/asm/entry, x86/vdso: Move the vDSO code to arch/x86/entry/vdso/	2015-06-03 18:51:37 +02:00
Kconfig	arch/x86/Kconfig: CONFIG_X86_UV should depend on CONFIG_EFI	2016-02-11 18:35:48 -08:00
Kconfig.cpu	x86/Kconfig/cpus: Fix/complete CPU type help texts	2015-10-21 11:12:56 +02:00
Kconfig.debug	libnvdimm for 4.5	2016-01-13 19:15:14 -08:00
Makefile	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2015-11-04 09:11:12 -08:00
Makefile_32.cpu
Makefile.um	kbuild: use relative path more to include Makefile	2015-04-02 16:42:08 +02:00