watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/u4:0:7]
Modules linked in:
irq event stamp: 86393601
hardirqs last  enabled at (86393600): [<ffffffff81003ce4>] trace_hardirqs_on_thunk+0x1a/0x1c
hardirqs last disabled at (86393601): [<ffffffff81003d00>] trace_hardirqs_off_thunk+0x1a/0x1c
softirqs last  enabled at (86388810): [<ffffffff87b8be01>] tipc_shutdown+0x121/0x310 net/tipc/socket.c:2584
softirqs last disabled at (86388812): [<ffffffff87ba6ab3>] spin_lock_bh include/linux/spinlock.h:334 [inline]
softirqs last disabled at (86388812): [<ffffffff87ba6ab3>] tipc_topsrv_stop net/tipc/topsrv.c:702 [inline]
softirqs last disabled at (86388812): [<ffffffff87ba6ab3>] tipc_topsrv_exit_net+0x283/0x5c0 net/tipc/topsrv.c:722
CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 4.19.195-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:101
Code: 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 80 df 01 00 65 8b 15 cc 5f 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 <83> fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48
RSP: 0018:ffff8880b5a47bd8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff8880b5a361c0 RBX: 000000002a745467 RCX: ffffffff87ee14fa
RDX: 0000000000000000 RSI: ffffffff87ba6ab8 RDI: 0000000000000006
RBP: ffff88803db5b7c0 R08: 0000000000000001 R09: 000000002a745467
R10: 0000000000000006 R11: 0000000000000000 R12: ffff88803db5b810
R13: ffffed1007b6b709 R14: ffff88808b1f0ac0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ee24000 CR3: 00000000ab75d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tipc_topsrv_stop net/tipc/topsrv.c:697 [inline]
 tipc_topsrv_exit_net+0x288/0x5c0 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:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 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