Trying to set illegal importance in message
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BUG: KASAN: use-after-free in ____bpf_clone_redirect net/core/filter.c:1768 [inline]
BUG: KASAN: use-after-free in bpf_clone_redirect+0x2de/0x2f0 net/core/filter.c:1759
Read of size 8 at addr ffff888083e8d4d0 by task syz-executor.2/8179

CPU: 1 PID: 8179 Comm: syz-executor.2 Not tainted 4.14.150 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x197 lib/dump_stack.c:53
 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
 ____bpf_clone_redirect net/core/filter.c:1768 [inline]
 bpf_clone_redirect+0x2de/0x2f0 net/core/filter.c:1759
 bpf_prog_5dcdee4b6441ca99+0xe74/0x1000

Allocated by task 17:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
 kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:489
 kmem_cache_alloc+0x12e/0x780 mm/slab.c:3552
 skb_clone+0x129/0x320 net/core/skbuff.c:1282
 skb_share_check include/linux/skbuff.h:1540 [inline]
 packet_rcv_spkt+0x424/0x560 net/packet/af_packet.c:1857
 deliver_skb net/core/dev.c:1881 [inline]
 deliver_ptype_list_skb net/core/dev.c:1896 [inline]
 __netif_receive_skb_core+0x9ef/0x2ca0 net/core/dev.c:4460
 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4515
 netif_receive_skb_internal+0xe4/0x5a0 net/core/dev.c:4588
 napi_skb_finish net/core/dev.c:4949 [inline]
 napi_gro_receive+0x2f8/0x410 net/core/dev.c:4980
 receive_buf+0x532/0x3fc0 drivers/net/virtio_net.c:852
 virtnet_receive drivers/net/virtio_net.c:1098 [inline]
 virtnet_poll+0x515/0xa6e drivers/net/virtio_net.c:1189
 napi_poll net/core/dev.c:5598 [inline]
 net_rx_action+0x490/0xf80 net/core/dev.c:5664
 __do_softirq+0x244/0x9a0 kernel/softirq.c:288

Freed by task 17:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kmem_cache_free+0x83/0x2b0 mm/slab.c:3758
 kfree_skbmem net/core/skbuff.c:586 [inline]
 kfree_skbmem+0xac/0x120 net/core/skbuff.c:580
 __kfree_skb net/core/skbuff.c:646 [inline]
 kfree_skb+0xbd/0x340 net/core/skbuff.c:663
 packet_rcv_spkt+0xd9/0x560 net/packet/af_packet.c:1888
 deliver_skb net/core/dev.c:1881 [inline]
 deliver_ptype_list_skb net/core/dev.c:1896 [inline]
 __netif_receive_skb_core+0x9ef/0x2ca0 net/core/dev.c:4460
 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4515
 netif_receive_skb_internal+0xe4/0x5a0 net/core/dev.c:4588
 napi_skb_finish net/core/dev.c:4949 [inline]
 napi_gro_receive+0x2f8/0x410 net/core/dev.c:4980
 receive_buf+0x532/0x3fc0 drivers/net/virtio_net.c:852
 virtnet_receive drivers/net/virtio_net.c:1098 [inline]
 virtnet_poll+0x515/0xa6e drivers/net/virtio_net.c:1189
 napi_poll net/core/dev.c:5598 [inline]
 net_rx_action+0x490/0xf80 net/core/dev.c:5664
 __do_softirq+0x244/0x9a0 kernel/softirq.c:288

The buggy address belongs to the object at ffff888083e8d440
 which belongs to the cache skbuff_head_cache of size 232
The buggy address is located 144 bytes inside of
 232-byte region [ffff888083e8d440, ffff888083e8d528)
The buggy address belongs to the page:
page:ffffea00020fa340 count:1 mapcount:0 mapping:ffff888083e8d080 index:0xffff888083e8d580
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffff888083e8d080 ffff888083e8d580 0000000100000003
raw: ffffea00024fd660 ffffea000279b5a0 ffff88821b75f3c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888083e8d380: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
 ffff888083e8d400: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff888083e8d480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff888083e8d500: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
 ffff888083e8d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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