uvm_fault(0xffffffff839b9bc0, 0xffff800029f26000, 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
* 69449  95434      0           0  0x4000000    0  syz-executor
kcov_remote_enter(0,ffff80002a7dd210) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffffffff837aba40,ffff80002a776b00) at timeout_run+0xc2 sys/kern/kern_timeout.c:696
softclock_process_tick_timeout(ffff80002a776b00,0) 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
writedisklabel(d02,ffffffff817f2320,ffff800000037000) at writedisklabel+0x1b8 sys/arch/amd64/amd64/disksubr.c:158
sdioctl(d02,84946467,ffff800001491800,6,ffff800038113788) at sdioctl+0x959 sys/scsi/sd.c:921
VOP_IOCTL(fffffd8064fd0008,84946467,ffff800001491800,6,fffffd8007bfd8f0,ffff800038113788) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806cf891f0,84946467,ffff800001491800,ffff800038113788) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff800038113788,ffff80003c9cd760,ffff80003c9cd6b0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1
syscall(ffff80003c9cd760) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c9cd760) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa6d111d710, count: 1
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.