[  69.8339607] panic: lock address : 0xffffffff82d80f00 type     :               spin
[  69.8339607] initialized  : 0xffffffff81a40b35
[  69.8339607] shared holds :                  0 exclusive:                  1
[  69.8339607] shares wanted:                  0 exclusive:                  0
[  69.8339607] current cpu  :                  0 last held:                  0
[  69.8339607] current lwp  : 0xffffc40011e29800 last held: 0xffffc40011e29800
[  69.8339607] last locked* : 0xffffffff80c589c8 unlocked : 0xffffffff80268335
[  69.8339607] curcpu holds :                  0 wanted by: 000000000000000000
[  69.8339607] kernel diagnostic assertion "ci->ci_biglock_count == 0" failed: file "/syzkaller/managers/netbsd/kernel/sys/sys/userret.h", line 88 

[  69.9122199] cpu1: Begin traceback...