==================================================================
BUG: KASAN: use-after-free in deliver_ptype_list_skb net/core/dev.c:1871 [inline]
BUG: KASAN: use-after-free in __netif_receive_skb_core+0x2be3/0x33d0 net/core/dev.c:4401
Read of size 2 at addr ffff8801cb615640 by task syzkaller960656/4040

CPU: 1 PID: 4040 Comm: syzkaller960656 Not tainted 4.13.0-rc7-next-20170901+ #13
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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_load2_noabort+0x14/0x20 mm/kasan/report.c:428
 deliver_ptype_list_skb net/core/dev.c:1871 [inline]
 __netif_receive_skb_core+0x2be3/0x33d0 net/core/dev.c:4401
 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4456
 netif_receive_skb_internal+0x10b/0x5e0 net/core/dev.c:4527
 napi_skb_finish net/core/dev.c:4888 [inline]
 napi_gro_receive+0x3d0/0x500 net/core/dev.c:4919
 receive_buf+0xcc5/0x51f0 drivers/net/virtio_net.c:841
 virtnet_receive drivers/net/virtio_net.c:1087 [inline]
 virtnet_poll+0x304/0xad0 drivers/net/virtio_net.c:1168
 napi_poll net/core/dev.c:5530 [inline]
 net_rx_action+0x792/0x1910 net/core/dev.c:5596
 __do_softirq+0x2bb/0xbd0 kernel/softirq.c:284
 invoke_softirq kernel/softirq.c:364 [inline]
 irq_exit+0x1d3/0x210 kernel/softirq.c:405
 exiting_irq arch/x86/include/asm/apic.h:638 [inline]
 do_IRQ+0xf6/0x190 arch/x86/kernel/irq.c:253
 common_interrupt+0x9d/0x9d arch/x86/entry/entry_64.S:598
 </IRQ>
RIP: 0010:lock_release+0x6aa/0xd70 kernel/locking/lockdep.c:4011
RSP: 0018:ffff8801cbc77098 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff2e
RAX: dffffc0000000000 RBX: 1ffff1003978ee18 RCX: ffff8801cb5f68c8
RDX: 1ffffffff0b59305 RSI: 0000000000000001 RDI: 0000000000000282
RBP: ffff8801cbc77248 R08: ffff8801cbc76bc0 R09: 1ffff1003978ee24
R10: ffff8801cb5f6000 R11: 0000000000000000 R12: ffff8801cbc77120
R13: ffff8801cb5f6000 R14: 0000000000000000 R15: 0000000000000003
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x1a/0x30 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:356 [inline]
 inode_wait_for_writeback+0x2f/0x40 fs/fs-writeback.c:1213
 evict+0x44a/0x920 fs/inode.c:550
 iput_final fs/inode.c:1515 [inline]
 iput+0x7b9/0xaf0 fs/inode.c:1542
 dentry_unlink_inode+0x4b0/0x5e0 fs/dcache.c:375
 __dentry_kill+0x3b7/0x6d0 fs/dcache.c:572
 dentry_kill fs/dcache.c:613 [inline]
 dput.part.24+0x62c/0x740 fs/dcache.c:823
 dput+0x1f/0x30 fs/dcache.c:787
 __fput+0x52b/0x7f0 fs/file_table.c:228
 ____fput+0x15/0x20 fs/file_table.c:246
 task_work_run+0x199/0x270 kernel/task_work.c:112
 exit_task_work include/linux/task_work.h:21 [inline]
 do_exit+0xa52/0x1b40 kernel/exit.c:865
 do_group_exit+0x149/0x400 kernel/exit.c:968
 SYSC_exit_group kernel/exit.c:979 [inline]
 SyS_exit_group+0x1d/0x20 kernel/exit.c:977
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x445d39
RSP: 002b:00007ffe3a862bd8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7