RBP: 00000000006cb018 R08: 000000000000001c R09: 00007ffea32c0036
R10: 0000000020b89fe4 R11: 0000000000000246 R12: 0000000000000004
R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000
Name sequence creation failed, no memory
Failed to create subscription for {65537,0,4294967295}
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
IP: __list_del_entry_valid+0xd1/0x440 lib/list_debug.c:51
PGD 0 P4D 0 
Oops: 0000 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4464 Comm: syzkaller713281 Not tainted 4.16.0+ #85
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid+0xd1/0x440 lib/list_debug.c:51
RSP: 0018:ffff8801cba5f678 EFLAGS: 00010286
RAX: 0000000000000001 RBX: 00000000be600094 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000be600094 RDI: ffffffff83ed1f4a
RBP: ffff8801cba5f6d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffffffffffff
R13: 0000000000000010 R14: 00000000be600094 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000aa30000 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
 SYSC_exit_group+0x21/0x30 kernel/exit.c:981
 SyS_exit_group+0x25/0x30 kernel/exit.c:979
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x43f0f8
RSP: 002b:00007ffea32c6378 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043f0f8
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bf1e8 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000020b89fe4 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000
Code: 15 4c 89 f8 4c 31 f0 4c 89 e1 48 f7 d1 48 21 c1 0f 84 76 01 00 00 4d 39 f7 0f 84 7e 01 00 00 41 89 de 4d 85 e4 0f 85 01 02 00 00 <4d> 8b 27 4c 89 ff e8 14 7a cb fd 48 8b 18 44 8b 3a 48 89 d8 48 
RIP: __list_del_entry_valid+0xd1/0x440 lib/list_debug.c:51 RSP: ffff8801cba5f678
CR2: 0000000000000000
---[ end trace 677d488f4f08c961 ]---