uvm_fault(0xffffffff83ad8248, 0xffff800029ee6000, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at      kcov_remote_enter+0x122:        movq    $0,0(%rcx)
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*203894  65866      0        0x10  0x4000000    0  syz-executor
kcov_remote_enter(0,ffff80002f0acd98) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffffffff839925e0,ffff80002f0b1570) at timeout_run+0xdf sys/kern/kern_timeout.c:696
softclock_process_tick_timeout(ffff80002f0b1570,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756
softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788
softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87
dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
mtx_enter(fffff80076daa368) at mtx_enter+0x9a sys/kern/kern_lock.c:553
pmap_enter(fffff80076daa368,2000005ff000,7bca8000,5,35) at pmap_enter+0x247 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
pmap_enter(fffff80076daa368,2000005ff000,7bca8000,5,35) at pmap_enter+0x247 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline]
pmap_enter(fffff80076daa368,2000005ff000,7bca8000,5,35) at pmap_enter+0x247 sys/arch/amd64/amd64/pmap.c:2777
uvm_fault_lower(ffff8000320c9980,ffff8000320c99b8,ffff8000320c9900) at uvm_fault_lower+0x7a6 sys/uvm/uvm_fault.c:1504
uvm_fault(fffff8007edfed08,2000005ff000,2,5) at uvm_fault+0x241 sys/uvm/uvm_fault.c:-1
uvm_fault_wire(fffff8007edfed08,200000010000,200000800000,5) at uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1703
uvm_map_pageable_wire(fffff8007edfed08,fffff8007ef19010,fffff8006db0aec8,0,0,0) at uvm_map_pageable_wire+0x3f1 sys/uvm/uvm_map.c:2132
sys_mlock(ffff80002a766fa0,ffff8000320c9c90,ffff8000320c9be0) at sys_mlock+0x23d sys/uvm/uvm_mmap.c:849
end trace frame: 0xffff8000320c9c80, count: 0
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb> 
ddb> set $lines = 0
ddb>