EXT4-fs (loop0): VFS: Can't find ext4 filesystem
watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/u4:2:45]
Modules linked in:
irq event stamp: 41019567
hardirqs last  enabled at (41019566): [<ffffffff81003ce4>] trace_hardirqs_on_thunk+0x1a/0x1c
hardirqs last disabled at (41019567): [<ffffffff81003d00>] trace_hardirqs_off_thunk+0x1a/0x1c
softirqs last  enabled at (41014528): [<ffffffff87b996b1>] tipc_shutdown+0x121/0x310 net/tipc/socket.c:2603
softirqs last disabled at (41014530): [<ffffffff87bb4683>] spin_lock_bh include/linux/spinlock.h:334 [inline]
softirqs last disabled at (41014530): [<ffffffff87bb4683>] tipc_topsrv_stop net/tipc/topsrv.c:702 [inline]
softirqs last disabled at (41014530): [<ffffffff87bb4683>] tipc_topsrv_exit_net+0x283/0x5c0 net/tipc/topsrv.c:722
CPU: 1 PID: 45 Comm: kworker/u4:2 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline]
RIP: 0010:write_comp_data+0xf/0x70 kernel/kcov.c:122
Code: 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 c0 df 01 00 <65> 8b 05 7a 59 9f 7e a9 00 01 1f 00 75 4f 8b 86 60 13 00 00 83 f8
RSP: 0018:ffff8880b519fbd8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 0000000029656f04 RCX: ffffffff87bb46ad
RDX: 0000000000000002 RSI: ffff8880b5190500 RDI: 0000000000000005
RBP: ffff88804df002c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff88804df00310
R13: ffffed1009be0069 R14: ffff8880518219c0 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f665eeb12d8 CR3: 000000009bde4000 CR4: 00000000003406e0
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+0x2ad/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:554
 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 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60
----------------
Code disassembly (best guess):
   0:	8b 11                	mov    (%rcx),%edx
   2:	48 83 c2 01          	add    $0x1,%rdx
   6:	48 39 d0             	cmp    %rdx,%rax
   9:	76 07                	jbe    0x12
   b:	48 89 34 d1          	mov    %rsi,(%rcx,%rdx,8)
   f:	48 89 11             	mov    %rdx,(%rcx)
  12:	c3                   	retq
  13:	0f 1f 84 00 00 00 00 	nopl   0x0(%rax,%rax,1)
  1a:	00
  1b:	49 89 f1             	mov    %rsi,%r9
  1e:	49 89 fa             	mov    %rdi,%r10
  21:	65 48 8b 34 25 c0 df 	mov    %gs:0x1dfc0,%rsi
  28:	01 00
* 2a:	65 8b 05 7a 59 9f 7e 	mov    %gs:0x7e9f597a(%rip),%eax        # 0x7e9f59ab <-- trapping instruction
  31:	a9 00 01 1f 00       	test   $0x1f0100,%eax
  36:	75 4f                	jne    0x87
  38:	8b 86 60 13 00 00    	mov    0x1360(%rsi),%eax
  3e:	83                   	.byte 0x83
  3f:	f8                   	clc