dev_remove_pack: ffff8801d39ccb80 not found
==================================================================
BUG: KASAN: use-after-free in skb_loop_sk net/core/dev.c:1882 [inline]
BUG: KASAN: use-after-free in dev_queue_xmit_nit+0xa0c/0xae0 net/core/dev.c:1911
Read of size 8 at addr ffff8801c7a32ce0 by task sshd/2973

CPU: 1 PID: 2973 Comm: sshd Not tainted 4.13.0+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 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
 skb_loop_sk net/core/dev.c:1882 [inline]
 dev_queue_xmit_nit+0xa0c/0xae0 net/core/dev.c:1911
 xmit_one net/core/dev.c:2971 [inline]
 dev_hard_start_xmit+0x16b/0xac0 net/core/dev.c:2991
 sch_direct_xmit+0x31d/0x6d0 net/sched/sch_generic.c:186
 __dev_xmit_skb net/core/dev.c:3173 [inline]
 __dev_queue_xmit+0x15fe/0x1e40 net/core/dev.c:3440
 dev_queue_xmit+0x17/0x20 net/core/dev.c:3505
 neigh_hh_output include/net/neighbour.h:471 [inline]
 neigh_output include/net/neighbour.h:479 [inline]
 ip_finish_output2+0xece/0x1460 net/ipv4/ip_output.c:229
sctp: [Deprecated]: syz-executor4 (pid 12991) Use of int in maxseg socket option.
Use struct sctp_assoc_value instead
sctp: [Deprecated]: syz-executor4 (pid 12991) Use of int in maxseg socket option.
Use struct sctp_assoc_value instead
 ip_finish_output+0x85e/0xd10 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:238 [inline]
 ip_output+0x1cc/0x860 net/ipv4/ip_output.c:405
 dst_output include/net/dst.h:472 [inline]
 ip_local_out+0x95/0x160 net/ipv4/ip_output.c:124
 ip_queue_xmit+0x8c6/0x18e0 net/ipv4/ip_output.c:504
 tcp_transmit_skb+0x1947/0x3300 net/ipv4/tcp_output.c:1123
 tcp_write_xmit+0x5fc/0x4960 net/ipv4/tcp_output.c:2341
 __tcp_push_pending_frames+0xa0/0x250 net/ipv4/tcp_output.c:2516
 tcp_push+0x4e0/0x760 net/ipv4/tcp.c:715
 tcp_sendmsg_locked+0x17ad/0x3bc0 net/ipv4/tcp.c:1408
 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1445
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 sock_write_iter+0x320/0x5e0 net/socket.c:912
 call_write_iter include/linux/fs.h:1744 [inline]
 new_sync_write fs/read_write.c:457 [inline]
 __vfs_write+0x68a/0x970 fs/read_write.c:470
 vfs_write+0x18f/0x510 fs/read_write.c:518
 SYSC_write fs/read_write.c:565 [inline]
 SyS_write+0xef/0x220 fs/read_write.c:557
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x7f852b42f370
RSP: 002b:00007fff1ab0cae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000fd8 RCX: 00007f852b42f370
RDX: 0000000000000fd8 RSI: 0000564d7e39f1e0 RDI: 0000000000000003
RBP: 0000000000000082 R08: 0000000000000001 R09: 0101010101010101
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000061633336
R13: 00000000f820a5ae R14: 0000000066396238 R15: 000000003e49f8aa

Allocated by task 12944:
 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]
 fanout_add+0xa50/0x1190 net/packet/af_packet.c:1733
 packet_setsockopt+0xfdc/0x1e80 net/packet/af_packet.c:3795
 SYSC_setsockopt net/socket.c:1852 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1831
 entry_SYSCALL_64_fastpath+0x1f/0xbe

Freed by task 12944:
 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
 packet_release+0xa8f/0xd70 net/packet/af_packet.c:3033
 sock_release+0x8d/0x1e0 net/socket.c:597
 sock_close+0x16/0x20 net/socket.c:1126
 __fput+0x333/0x7f0 fs/file_table.c:210
 ____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
 get_signal+0x7e8/0x17e0 kernel/signal.c:2334
 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808
 exit_to_usermode_loop+0x224/0x300 arch/x86/entry/common.c:158
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath+0x42f/0x500 arch/x86/entry/common.c:266
 entry_SYSCALL_64_fastpath+0xbc/0xbe

The buggy address belongs to the object at ffff8801c7a32440
 which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 2208 bytes inside of
 4096-byte region [ffff8801c7a32440, ffff8801c7a33440)
The buggy address belongs to the page:
page:ffffea00071e8c80 count:1 mapcount:0 mapping:ffff8801c7a32440 index:0x0 compound_mapcount: 0
flags: 0x200000000008100(slab|head)
raw: 0200000000008100 ffff8801c7a32440 0000000000000000 0000000100000001
raw: ffffea00071a0720 ffffea00071b2da0 ffff8801dac00dc0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c7a32b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801c7a32c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8801c7a32c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff8801c7a32d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801c7a32d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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