audit: type=1400 audit(1563542363.465:8): avc:  denied  { prog_load } for  pid=1783 comm="syz-executor004" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1
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audit: type=1400 audit(1563542363.515:9): avc:  denied  { prog_run } for  pid=1783 comm="syz-executor004" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1
BUG: KASAN: use-after-free in ____bpf_clone_redirect /net/core/filter.c:1768 [inline]
BUG: KASAN: use-after-free in bpf_clone_redirect+0x2a7/0x2b0 /net/core/filter.c:1759
Read of size 8 at addr ffff8881d6ceb1d0 by task syz-executor004/1783

CPU: 0 PID: 1783 Comm: syz-executor004 Not tainted 4.14.133+ #17
Call Trace:
 __dump_stack /lib/dump_stack.c:17 [inline]
 dump_stack+0xca/0x134 /lib/dump_stack.c:53
 print_address_description+0x60/0x226 /mm/kasan/report.c:187
 __kasan_report.cold+0x1a/0x41 /mm/kasan/report.c:316

Allocated by task 1781:
 save_stack /mm/kasan/common.c:76 [inline]
 set_track /mm/kasan/common.c:85 [inline]
 __kasan_kmalloc.part.0+0x53/0xc0 /mm/kasan/common.c:495
 slab_post_alloc_hook /mm/slab.h:439 [inline]
 slab_alloc_node /mm/slub.c:2758 [inline]
 slab_alloc /mm/slub.c:2766 [inline]
 kmem_cache_alloc+0xd2/0x2e0 /mm/slub.c:2771
 skb_clone+0x124/0x370 /net/core/skbuff.c:1282
 dev_queue_xmit_nit+0x2f3/0x970 /net/core/dev.c:1943
 xmit_one /net/core/dev.c:3005 [inline]
 dev_hard_start_xmit+0xa3/0x8c0 /net/core/dev.c:3025
 sch_direct_xmit+0x27a/0x520 /net/sched/sch_generic.c:186
 0xffffffffffffffff

Freed by task 1781:
 save_stack /mm/kasan/common.c:76 [inline]
 set_track /mm/kasan/common.c:85 [inline]
 __kasan_slab_free+0x164/0x210 /mm/kasan/common.c:457
 slab_free_hook /mm/slub.c:1403 [inline]
 slab_free_freelist_hook /mm/slub.c:1430 [inline]
 slab_free /mm/slub.c:3005 [inline]
 kmem_cache_free+0xcb/0x340 /mm/slub.c:3021
 kfree_skbmem /net/core/skbuff.c:586 [inline]
 kfree_skbmem+0xa0/0x110 /net/core/skbuff.c:580
 __kfree_skb /net/core/skbuff.c:646 [inline]
 kfree_skb+0xeb/0x370 /net/core/skbuff.c:663
 packet_rcv_spkt+0xd5/0x4d0 /net/packet/af_packet.c:1888
 dev_queue_xmit_nit+0x6e1/0x970 /net/core/dev.c:1975
 0xffffffffffffffff

The buggy address belongs to the object at ffff8881d6ceb140
 which belongs to the cache skbuff_head_cache of size 224
The buggy address is located 144 bytes inside of
 224-byte region [ffff8881d6ceb140, ffff8881d6ceb220)
The buggy address belongs to the page:
page:ffffea00075b3ac0 count:1 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000200(slab)
raw: 4000000000000200 0000000000000000 0000000000000000 00000001800c000c
raw: dead000000000100 dead000000000200 ffff8881dab58200 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d6ceb080: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8881d6ceb100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff8881d6ceb180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff8881d6ceb200: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881d6ceb280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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