watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kworker/u4:3:149]
Modules linked in:
irq event stamp: 16756205
hardirqs last  enabled at (16756204): [<ffffffff81003ce4>] trace_hardirqs_on_thunk+0x1a/0x1c
hardirqs last disabled at (16756205): [<ffffffff81003d00>] trace_hardirqs_off_thunk+0x1a/0x1c
softirqs last  enabled at (16751718): [<ffffffff87b83e21>] tipc_shutdown+0x121/0x310 net/tipc/socket.c:2581
softirqs last disabled at (16751720): [<ffffffff87b9eac3>] spin_lock_bh include/linux/spinlock.h:334 [inline]
softirqs last disabled at (16751720): [<ffffffff87b9eac3>] tipc_topsrv_stop net/tipc/topsrv.c:702 [inline]
softirqs last disabled at (16751720): [<ffffffff87b9eac3>] tipc_topsrv_exit_net+0x283/0x5c0 net/tipc/topsrv.c:722
CPU: 0 PID: 149 Comm: kworker/u4:3 Not tainted 4.19.188-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:idr_find+0x8/0x50 lib/idr.c:177
Code: 8b 45 48 48 89 ef 31 d2 48 29 c3 48 89 de 5b 5d e9 cd 10 01 00 e8 d8 9d ab f9 eb e4 66 0f 1f 44 00 00 55 48 89 fd 53 48 89 f3 <e8> 13 dd 75 f9 48 8d 7d 48 48 b8 00 00 00 00 00 fc ff df 48 89 fa
RSP: 0018:ffff8880b531fbc8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffff8880b53c4440 RBX: 0000000024f96c69 RCX: ffffffff87b9eaed
RDX: 0000000000000000 RSI: 0000000024f96c69 RDI: ffff88809cc9c000
RBP: ffff88809cc9c000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff88809cc9c050
R13: ffffed1013993811 R14: ffff8880427bca00 R15: 0000000000000347
FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005582e7e596e8 CR3: 00000000a57a3000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tipc_topsrv_stop net/tipc/topsrv.c:698 [inline]
 tipc_topsrv_exit_net+0x25e/0x5c0 net/tipc/topsrv.c:722
 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153
 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:553
 process_one_work+0x864/0x1570 kernel/workqueue.c:2152
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2295
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60