dev_remove_pack: ffff8801c9436900 not found
refcount_t: decrement hit 0; leaking memory.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 23250 at lib/refcount.c:228 refcount_dec+0x4c/0x50 lib/refcount.c:228
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 23250 Comm: syz-executor5 Not tainted 4.14.0-rc8-next-20171110+ #40
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+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1c4/0x1e0 kernel/panic.c:546
 report_bug+0x211/0x2d0 lib/bug.c:184
 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:926
RIP: 0010:refcount_dec+0x4c/0x50 lib/refcount.c:228
RSP: 0018:ffff8801c92cf0e8 EFLAGS: 00010286
RAX: 000000000000002c RBX: ffff8801c94361c0 RCX: 0000000000000000
RDX: 000000000000002c RSI: 1ffff10039259ddd RDI: ffffed0039259e11
RBP: ffff8801c92cf0f0 R08: 1ffff10039259d9f R09: 0000000000000000
R10: ffff88019486e580 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8801c9436140 R14: 1ffff10039259e36 R15: ffff8801d6bd7600
 __sock_put include/net/sock.h:626 [inline]
 __unregister_prot_hook+0x1c4/0x280 net/packet/af_packet.c:368
 unregister_prot_hook net/packet/af_packet.c:382 [inline]
 packet_release+0x8e5/0xde0 net/packet/af_packet.c:3006
 sock_release+0x8d/0x1e0 net/socket.c:596
 sock_close+0x16/0x20 net/socket.c:1125
 __fput+0x333/0x7f0 fs/file_table.c:210
 ____fput+0x15/0x20 fs/file_table.c:244
 task_work_run+0x199/0x270 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x9b5/0x1ad0 kernel/exit.c:869
 do_group_exit+0x149/0x400 kernel/exit.c:972
 get_signal+0x73f/0x16c0 kernel/signal.c:2333
 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0x214/0x310 arch/x86/entry/common.c:158
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264
 entry_SYSCALL_64_fastpath+0x94/0x96
RIP: 0033:0x452879
RSP: 002b:00007ff641097ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000007581b8 RCX: 0000000000452879
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000007581b8
RBP: 00000000007581b8 R08: 0000000000000426 R09: 0000000000758190
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007ff6410989c0 R15: 0000000000000002
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..