RSP: 002b:00007ffe5e9f5b40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007f5284405c9b RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000005 RBP: 00007f5284567960 R08: 0000000000000000 R09: 00007f528456a870 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000003246c6 R13: 00007ffe5e9f5c40 R14: 00007f52845661d0 R15: 0000000000000032 ---[ end trace e84eda6febaba4ad ]--- ================================================================== BUG: KASAN: use-after-free in vmclear_local_loaded_vmcss arch/x86/kvm/vmx/vmx.c:2322 [inline] BUG: KASAN: use-after-free in hardware_disable+0x10f/0x250 arch/x86/kvm/vmx/vmx.c:2341 Read of size 8 at addr ffff888159ada8f8 by task syz-executor.0/11676 CPU: 0 PID: 11676 Comm: syz-executor.0 Tainted: G W 5.10.93-syzkaller-01028-g0347b1658399 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x8d/0x3d0 mm/kasan/report.c:233 __kasan_report+0x142/0x220 mm/kasan/report.c:419 kasan_report+0x51/0x70 mm/kasan/report.c:436 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 vmclear_local_loaded_vmcss arch/x86/kvm/vmx/vmx.c:2322 [inline] hardware_disable+0x10f/0x250 arch/x86/kvm/vmx/vmx.c:2341 kvm_arch_hardware_disable+0x16/0xe0 arch/x86/kvm/x86.c:10306 hardware_disable_nolock+0x77/0x80 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4119 on_each_cpu+0x117/0x1a0 kernel/smp.c:839 hardware_disable_all_nolock arch/x86/kvm/../../../virt/kvm/kvm_main.c:4137 [inline] hardware_disable_all arch/x86/kvm/../../../virt/kvm/kvm_main.c:4143 [inline] kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:897 [inline] kvm_put_kvm+0xf72/0x10a0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:910 kvm_vcpu_release+0x57/0x60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3093 __fput+0x348/0x7d0 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f5284405c9b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffe5e9f5b40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007f5284405c9b RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000005 RBP: 00007f5284567960 R08: 0000000000000000 R09: 00007f528456a870 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000003246c6 R13: 00007ffe5e9f5c40 R14: 00007f52845661d0 R15: 0000000000000032 Allocated by task 11681: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] __kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:461 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook mm/slab.h:583 [inline] slab_alloc_node mm/slub.c:2954 [inline] slab_alloc mm/slub.c:2962 [inline] kmem_cache_alloc+0x1a2/0x380 mm/slub.c:2967 kmem_cache_zalloc include/linux/slab.h:654 [inline] kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:3158 [inline] kvm_vm_ioctl+0xd78/0x1fa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3735 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0x115/0x190 fs/ioctl.c:739 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 11676: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:357 ____kasan_slab_free+0x133/0x170 mm/kasan/common.c:360 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:368 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:1602 [inline] slab_free_freelist_hook+0xcc/0x1a0 mm/slub.c:1628 slab_free mm/slub.c:3210 [inline] kmem_cache_free+0xb5/0x1f0 mm/slub.c:3226 kvm_vcpu_destroy+0x7e/0xb0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:428 kvm_free_vcpus arch/x86/kvm/x86.c:10470 [inline] kvm_arch_destroy_vm+0x40f/0x6c0 arch/x86/kvm/x86.c:10565 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:889 [inline] kvm_put_kvm+0x95a/0x10a0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:910 kvm_vcpu_release+0x57/0x60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3093 __fput+0x348/0x7d0 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff888159ad8000 which belongs to the cache kvm_vcpu of size 11328 The buggy address is located 10488 bytes inside of 11328-byte region [ffff888159ad8000, ffff888159adac40) The buggy address belongs to the page: page:ffffea000566b600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159ad8 head:ffffea000566b600 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x8000000000010200(slab|head) raw: 8000000000010200 ffffea00043c2500 0000000200000002 ffff8881047b5c80 raw: 0000000000000000 0000000080010001 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x152cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 8579, ts 3011897139514, free_ts 2962451430028 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2385 [inline] prep_new_page mm/page_alloc.c:2391 [inline] get_page_from_freelist+0xa74/0xa90 mm/page_alloc.c:4063 __alloc_pages_nodemask+0x3c8/0x820 mm/page_alloc.c:5106 alloc_slab_page mm/slub.c:1813 [inline] allocate_slab+0x6b/0x350 mm/slub.c:1815 new_slab mm/slub.c:1876 [inline] new_slab_objects mm/slub.c:2635 [inline] ___slab_alloc+0x143/0x2f0 mm/slub.c:2798 __slab_alloc mm/slub.c:2838 [inline] slab_alloc_node mm/slub.c:2920 [inline] slab_alloc mm/slub.c:2962 [inline] kmem_cache_alloc+0x26f/0x380 mm/slub.c:2967 kmem_cache_zalloc include/linux/slab.h:654 [inline] kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:3158 [inline] kvm_vm_ioctl+0xd78/0x1fa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3735 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0x115/0x190 fs/ioctl.c:739 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1331 [inline] free_pcp_prepare+0x18f/0x1c0 mm/page_alloc.c:1405 free_unref_page_prepare mm/page_alloc.c:3291 [inline] free_unref_page_list+0x116/0x5d0 mm/page_alloc.c:3361 release_pages+0xa62/0xaa0 mm/swap.c:1081 free_pages_and_swap_cache+0x88/0xa0 mm/swap_state.c:356 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu+0x8c0/0xaa0 mm/mmu_gather.c:249 tlb_finish_mmu+0xd2/0x1f0 mm/mmu_gather.c:328 exit_mmap+0x319/0x5c0 mm/mmap.c:3328 __mmput+0x95/0x2c0 kernel/fork.c:1133 mmput+0x4b/0x50 kernel/fork.c:1154 exit_mm+0x615/0x7e0 kernel/exit.c:489 do_exit+0x6c4/0x23a0 kernel/exit.c:800 do_group_exit+0x16a/0x2d0 kernel/exit.c:910 get_signal+0x131f/0x1f70 kernel/signal.c:2780 arch_do_signal+0x8d/0x620 arch/x86/kernel/signal.c:805 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0xaa/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 Memory state around the buggy address: ffff888159ada780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888159ada800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888159ada880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888159ada900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888159ada980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================