refcount_t: decrement hit 0; leaking memory.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 31579 at lib/refcount.c:227 refcount_dec+0x4c/0x50 lib/refcount.c:227
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 31579 Comm: syz-executor1 Not tainted 4.14.0-rc5-mm1+ #20
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
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1c4/0x1e0 kernel/panic.c:546
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:177
 do_trap_no_signal arch/x86/kernel/traps.c:211 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:260
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:297
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:310
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:refcount_dec+0x4c/0x50 lib/refcount.c:227
RSP: 0018:ffff8801d0637078 EFLAGS: 00010286
RAX: 000000000000002c RBX: ffff8801c17ecec0 RCX: 0000000000000000
RDX: 000000000000002c RSI: 1ffff1003a0c6dcf RDI: ffffed003a0c6e03
RBP: ffff8801d0637080 R08: 0000000000000001 R09: 0000000000000000
R10: ffff8801d0636f48 R11: 0000000000000000 R12: ffff8801d62362c0
R13: ffff8801c17ece40 R14: 0000000000000001 R15: dffffc0000000000
 __sock_put include/net/sock.h:626 [inline]
 __unregister_prot_hook+0x1c4/0x280 net/packet/af_packet.c:371
 unregister_prot_hook net/packet/af_packet.c:385 [inline]
 packet_release+0x8bb/0xd70 net/packet/af_packet.c:3012
 sock_release+0x8d/0x1e0 net/socket.c:596
 sock_close+0x16/0x20 net/socket.c:1125
 __fput+0x327/0x7e0 fs/file_table.c:210
 ____fput+0x15/0x20 fs/file_table.c:244
 task_work_run+0x199/0x270 kernel/task_work.c:112
 exit_task_work include/linux/task_work.h:21 [inline]
 do_exit+0x9b5/0x1ad0 kernel/exit.c:869
 do_group_exit+0x149/0x400 kernel/exit.c:972
 get_signal+0x73f/0x16d0 kernel/signal.c:2333
 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808
 exit_to_usermode_loop+0x214/0x310 arch/x86/entry/common.c:158
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:266 [inline]
 do_syscall_64+0x65c/0x8d0 arch/x86/entry/common.c:292
 entry_SYSCALL64_slow_path+0x25/0x25
RIP: 0033:0x452869
RSP: 002b:00007f3a30847ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 0000000000758328 RCX: 0000000000452869
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000758328
RBP: 0000000000758328 R08: 0000000000000042 R09: 0000000000758300
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007f3a308489c0 R15: 000000000000000e
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..