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BUG: KASAN: use-after-free in list_empty include/linux/compiler.h:276 [inline]
BUG: KASAN: use-after-free in __queue_work+0x1029/0x1150 kernel/workqueue.c:1442
Read of size 8 at addr ffff88006cc0a0f0 by task syz-executor4/5173

CPU: 3 PID: 5173 Comm: syz-executor4 Not tainted 4.13.0-next-20170911+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 print_address_description+0x73/0x250 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report+0x24e/0x340 mm/kasan/report.c:409
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
 list_empty include/linux/compiler.h:276 [inline]
 __queue_work+0x1029/0x1150 kernel/workqueue.c:1442
 queue_work_on+0x16a/0x1c0 kernel/workqueue.c:1486
 queue_work include/linux/workqueue.h:489 [inline]
 schedule_work include/linux/workqueue.h:547 [inline]
 kvm_irqfd_assign arch/x86/kvm/../../../virt/kvm/eventfd.c:403 [inline]
 kvm_irqfd+0x1427/0x1d50 arch/x86/kvm/../../../virt/kvm/eventfd.c:572
 kvm_vm_ioctl+0x1079/0x1c40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2987
 vfs_ioctl fs/ioctl.c:45 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685
 SYSC_ioctl fs/ioctl.c:700 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x447299
RSP: 002b:00007ff5dd561c08 EFLAGS: 00000296 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000447299
RDX: 0000000020025fe0 RSI: 000000004020ae76 RDI: 000000000000001a
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 00000000ffffffff
R13: 00000000000058b0 R14: 00000000006e8970 R15: ffffffeffffffffb

Allocated by task 5173:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x136/0x750 mm/slab.c:3627
 kmalloc include/linux/slab.h:493 [inline]
 kzalloc include/linux/slab.h:666 [inline]
 kvm_irqfd_assign arch/x86/kvm/../../../virt/kvm/eventfd.c:296 [inline]
 kvm_irqfd+0x16c/0x1d50 arch/x86/kvm/../../../virt/kvm/eventfd.c:572
 kvm_vm_ioctl+0x1079/0x1c40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2987
 vfs_ioctl fs/ioctl.c:45 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685
 SYSC_ioctl fs/ioctl.c:700 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691
 entry_SYSCALL_64_fastpath+0x1f/0xbe

Freed by task 22822:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xca/0x250 mm/slab.c:3820
 irqfd_shutdown+0x13c/0x1a0 arch/x86/kvm/../../../virt/kvm/eventfd.c:148
 process_one_work+0xbfa/0x1bd0 kernel/workqueue.c:2119
 worker_thread+0x223/0x1860 kernel/workqueue.c:2253
 kthread+0x39c/0x470 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431

The buggy address belongs to the object at ffff88006cc0a040
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 176 bytes inside of
 512-byte region [ffff88006cc0a040, ffff88006cc0a240)
The buggy address belongs to the page:
page:ffffea0001b30280 count:1 mapcount:0 mapping:ffff88006cc0a040 index:0x0
flags: 0x500000000000100(slab)
raw: 0500000000000100 ffff88006cc0a040 0000000000000000 0000000100000006
raw: ffffea0001191ca0 ffffea0001b168a0 ffff88003e800940 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88006cc09f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88006cc0a000: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff88006cc0a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88006cc0a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88006cc0a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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