SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=32481 comm=syz-executor.5
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BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:183 [inline]
BUG: KASAN: use-after-free in deliver_ptype_list_skb net/core/dev.c:1888 [inline]
BUG: KASAN: use-after-free in __netif_receive_skb_core+0x23e1/0x2a30 net/core/dev.c:4462
Read of size 8 at addr ffff88805b6a5aa8 by task syz-executor.0/32475

CPU: 1 PID: 32475 Comm: syz-executor.0 Not tainted 4.14.197-syzkaller #0
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=32492 comm=syz-executor.5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 __read_once_size include/linux/compiler.h:183 [inline]
 deliver_ptype_list_skb net/core/dev.c:1888 [inline]
 __netif_receive_skb_core+0x23e1/0x2a30 net/core/dev.c:4462
 __netif_receive_skb+0x27/0x1a0 net/core/dev.c:4512
 process_backlog+0x210/0x6f0 net/core/dev.c:5194
 napi_poll net/core/dev.c:5595 [inline]
 net_rx_action+0x466/0xfd0 net/core/dev.c:5661
 __do_softirq+0x254/0xa1d kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x193/0x240 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
 </IRQ>
RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3611
RSP: 0018:ffff8881fdcdf460 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2d23 RBX: dffffc0000000000 RCX: 1ffff1103ffe957d
RDX: 0000000000000000 RSI: ffff8881fff4abf0 RDI: ffff8881fff4abc4
RBP: ffffed103ffe9468 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881fff4a340
R13: ffffffff87d16918 R14: 0000000000000000 R15: 0000000000000000
 retint_kernel+0x1b/0x2d
RIP: 0010:swake_up+0x0/0x1b0 kernel/sched/swait.c:34
RSP: 0018:ffff8881fdcdf538 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8881fff4abf0 RDI: ffffffff87d88320
RBP: ffffffff87d87140 R08: ffff8881fff4a6d0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286
R13: ffff8881fff4a6d8 R14: ffff8881fff4a6c8 R15: 0000000000000000
 rcu_read_unlock_special+0x8db/0xdd0 kernel/rcu/tree_plugin.h:526
 __rcu_read_unlock+0x158/0x160 kernel/rcu/update.c:260
 rcu_read_unlock include/linux/rcupdate.h:684 [inline]
 ip_queue_xmit+0x7e9/0x1a80 net/ipv4/ip_output.c:505
 __tcp_transmit_skb+0x17e2/0x2cb0 net/ipv4/tcp_output.c:1133
 tcp_transmit_skb net/ipv4/tcp_output.c:1149 [inline]
 tcp_write_xmit+0x69d/0x4e10 net/ipv4/tcp_output.c:2393
 __tcp_push_pending_frames+0xa0/0x230 net/ipv4/tcp_output.c:2577
 tcp_push_pending_frames include/net/tcp.h:1778 [inline]
 tcp_data_snd_check net/ipv4/tcp_input.c:5132 [inline]
 tcp_rcv_established+0x71a/0x17a0 net/ipv4/tcp_input.c:5579
 tcp_v4_do_rcv+0x541/0x7d0 net/ipv4/tcp_ipv4.c:1476
 sk_backlog_rcv include/net/sock.h:921 [inline]
 __release_sock+0x12a/0x350 net/core/sock.c:2269
 release_sock+0x54/0x1b0 net/core/sock.c:2805
 sk_stream_wait_memory+0x492/0xd20 net/core/stream.c:145
 tcp_sendmsg_locked+0x1179/0x2ef0 net/ipv4/tcp.c:1416
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457
 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 SYSC_sendto net/socket.c:1763 [inline]
 SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
FAT-fs (loop5): invalid media value (0x94)
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45d5b9
RSP: 002b:00007f3568dd8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000002d140 RCX: 000000000045d5b9
RDX: 000000000000fe6a RSI: 00000000200012c0 RDI: 0000000000000004
RBP: 000000000118cf98 R08: 0000000000000000 R09: 0000000000000027
R10: 000000000020c49a R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffe1a28c92f R14: 00007f3568dd99c0 R15: 000000000118cf4c

Allocated by task 32438:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
FAT-fs (loop5): Can't find a valid FAT filesystem
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15a/0x400 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 sk_prot_alloc+0x1ba/0x290 net/core/sock.c:1467
 sk_alloc+0x36/0xcd0 net/core/sock.c:1521
 packet_create+0xf5/0x7f0 net/packet/af_packet.c:3288
 __sock_create+0x303/0x620 net/socket.c:1275
 sock_create net/socket.c:1315 [inline]
 SYSC_socket net/socket.c:1345 [inline]
 SyS_socket+0xd1/0x1b0 net/socket.c:1325
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 32418:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
 sk_prot_free net/core/sock.c:1504 [inline]
 __sk_destruct+0x577/0x6e0 net/core/sock.c:1582
 sk_destruct net/core/sock.c:1597 [inline]
 __sk_free+0xd9/0x2d0 net/core/sock.c:1605
 sk_free+0x2b/0x40 net/core/sock.c:1616
 sock_put include/net/sock.h:1662 [inline]
 packet_release+0x837/0xa80 net/packet/af_packet.c:3117
 __sock_release+0xcd/0x2b0 net/socket.c:602
 sock_close+0x15/0x20 net/socket.c:1139
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

The buggy address belongs to the object at ffff88805b6a52c0
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 2024 bytes inside of
 2048-byte region [ffff88805b6a52c0, ffff88805b6a5ac0)
The buggy address belongs to the page:
page:ffffea00016da900 count:1 mapcount:0 mapping:ffff88805b6a41c0 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffff88805b6a41c0 0000000000000000 0000000100000003
raw: ffffea0002a68120 ffffea00025da7a0 ffff88812fe50c40 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88805b6a5980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805b6a5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805b6a5a80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                                  ^
 ffff88805b6a5b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805b6a5b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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