list_del corruption. prev->next should be 000000005034fdfe, but was 000000005a52792b
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:53!
invalid opcode: 0000 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 9365 Comm: syz-executor5 Not tainted 4.16.0+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid+0x37c/0x440 lib/list_debug.c:51
RSP: 0018:ffff8801539ef1a8 EFLAGS: 00010282
RAX: 0000000000000054 RBX: ffffffffffffffff RCX: 0000000000000000
RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
RBP: ffff8801539ef200 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: ffff880151bb0348
R13: 0000000000000000 R14: 00000000e0a000d4 R15: 00000000e0a000d4
FS:  00007f9e7395a700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006fe278 CR3: 0000000159566000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del_init include/linux/list.h:159 [inline]
 tipc_nametbl_unsubscribe+0x4a1/0xa90 net/tipc/name_table.c:848
 tipc_subscrb_subscrp_delete+0x399/0x990 net/tipc/subscr.c:212
 tipc_subscrb_delete net/tipc/subscr.c:242 [inline]
 tipc_subscrb_release_cb+0x61/0x100 net/tipc/subscr.c:321
 tipc_topsrv_kern_unsubscr+0x54b/0x630 net/tipc/server.c:535
 tipc_group_delete+0x4c8/0x520 net/tipc/group.c:231
 tipc_sk_leave net/tipc/socket.c:2795 [inline]
 tipc_release+0x215/0x1730 net/tipc/socket.c:577
 sock_release net/socket.c:595 [inline]
 sock_close+0xe0/0x300 net/socket.c:1149
 __fput+0x49e/0xa10 fs/file_table.c:209
 ____fput+0x37/0x40 fs/file_table.c:243
 task_work_run+0x243/0x2c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x10e1/0x38d0 kernel/exit.c:867
 do_group_exit+0x1a0/0x360 kernel/exit.c:970
 get_signal+0x1320/0x1f20 kernel/signal.c:2469
 do_signal+0xb8/0x1c80 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline]
 prepare_exit_to_usermode+0x271/0x3a0 arch/x86/entry/common.c:196
 syscall_return_slowpath+0xe9/0x700 arch/x86/entry/common.c:265
 do_syscall_64+0x36d/0x430 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455979
RSP: 002b:00007f9e73959ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000072bec8 RCX: 0000000000455979
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec8
RBP: 000000000072bec8 R08: 0000000000000036 R09: 000000000072bea0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000a3e81f R14: 00007f9e7395a9c0 R15: 0000000000000000
Code: 00 48 c7 81 80 0c 00 00 00 00 00 00 c7 81 20 03 00 00 00 00 00 00 48 c7 c7 b5 f7 82 8a 31 c0 48 8b 75 c0 4c 89 e2 e8 a4 a7 51 fd <0f> 0b 66 90 eb fe 44 89 f7 e8 76 83 cb fd e9 88 fd ff ff 48 85 
RIP: __list_del_entry_valid+0x37c/0x440 lib/list_debug.c:51 RSP: ffff8801539ef1a8
---[ end trace 0bc54d1c3eacfd34 ]---