8021q: adding VLAN 0 to HW filter on device team0 IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KASAN: use-after-free in __fire_sched_in_preempt_notifiers kernel/sched/core.c:2511 [inline] BUG: KASAN: use-after-free in fire_sched_in_preempt_notifiers kernel/sched/core.c:2517 [inline] BUG: KASAN: use-after-free in finish_task_switch+0x56e/0x8c0 kernel/sched/core.c:2709 Read of size 8 at addr ffff8801d2ba0058 by task syz-executor5/6778 CPU: 0 PID: 6778 Comm: syz-executor5 Not tainted 4.18.0-rc6+ #1 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+0x16e/0x22a lib/dump_stack.c:113 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.9+0x242/0x2fe mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 __fire_sched_in_preempt_notifiers kernel/sched/core.c:2511 [inline] fire_sched_in_preempt_notifiers kernel/sched/core.c:2517 [inline] finish_task_switch+0x56e/0x8c0 kernel/sched/core.c:2709 context_switch kernel/sched/core.c:2856 [inline] __schedule+0x83e/0x1f40 kernel/sched/core.c:3501 preempt_schedule_common+0x1f/0xd0 kernel/sched/core.c:3625 preempt_schedule+0x4d/0x60 kernel/sched/core.c:3651 ___preempt_schedule+0x16/0x18 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] _raw_spin_unlock_irqrestore+0xbb/0xd0 kernel/locking/spinlock.c:184 try_to_wake_up+0x10a/0x1350 kernel/sched/core.c:2079 wake_up_process kernel/sched/core.c:2148 [inline] wake_up_q+0xa4/0x100 kernel/sched/core.c:447 futex_wake+0x504/0x8b0 kernel/futex.c:1556 do_futex+0x877/0x24f0 kernel/futex.c:3531 __do_sys_futex kernel/futex.c:3587 [inline] __se_sys_futex kernel/futex.c:3555 [inline] __x64_sys_futex+0x1cb/0x4f0 kernel/futex.c:3555 do_syscall_64+0x183/0x700 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4577c9 Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe563988cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 000000000072c048 RCX: 00000000004577c9 RDX: 0000000000000016 RSI: 0000000000000081 RDI: 000000000072c04c RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072c04c R13: 00007ffc0e6df97f R14: 00007fe5639899c0 R15: 0000000000000002 Allocated by task 6767: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x780 mm/slab.c:3554 kmem_cache_zalloc include/linux/slab.h:697 [inline] vmx_create_vcpu+0xc6/0x1f50 arch/x86/kvm/vmx.c:10313 kvm_arch_vcpu_create+0xb0/0x1c0 arch/x86/kvm/x86.c:8387 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2466 [inline] kvm_vm_ioctl+0x5e0/0x1c60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2967 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x195/0x1650 fs/ioctl.c:684 ksys_ioctl+0x62/0x90 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:706 do_syscall_64+0x183/0x700 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 6766: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kmem_cache_free+0x83/0x2d0 mm/slab.c:3756 vmx_free_vcpu+0x200/0x290 arch/x86/kvm/vmx.c:10307 kvm_arch_vcpu_free arch/x86/kvm/x86.c:8373 [inline] kvm_free_vcpus arch/x86/kvm/x86.c:8822 [inline] kvm_arch_destroy_vm+0x322/0x7a0 arch/x86/kvm/x86.c:8919 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:746 [inline] kvm_put_kvm+0x59c/0xdd0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:767 kvm_vcpu_release+0x77/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2397 __fput+0x2e6/0x990 fs/file_table.c:209 ____fput+0x9/0x10 fs/file_table.c:243 task_work_run+0x19f/0x240 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:192 [inline] exit_to_usermode_loop+0x269/0x300 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x587/0x700 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801d2ba0040 which belongs to the cache kvm_vcpu of size 23616 The buggy address is located 24 bytes inside of 23616-byte region [ffff8801d2ba0040, ffff8801d2ba5c80) The buggy address belongs to the page: page:ffffea00074ae800 count:1 mapcount:0 mapping:ffff8801d52c3c00 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffff8801d52a7b48 ffffea0006e6f408 ffff8801d52c3c00 raw: 0000000000000000 ffff8801d2ba0040 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d2b9ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801d2b9ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801d2ba0000: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff8801d2ba0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801d2ba0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================