panic: attempt to execute user address 0x20ffa000 in supervisor mode
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*243719  59492      0           0  0x4000000    0  syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
pageflttrap() at pageflttrap+0x3eb
kerntrap(ffff800015b61a40) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:287
alltraps_kern_meltdown(6,ffff80001595d000,fffffd802e758238,10,ffff80000005bec0,ffff800015b61ca8) at alltraps_kern_meltdown+0x7b
__kernel_end_phys(b,ffff800015b61c08,83,ffff800015b61ca8,0,b) at 0x20ffa000
rt_match(fffffd8036ffb710,0,1,0) at rt_match+0xbe rt_clone sys/net/route.c:266 [inline]
rt_match(fffffd8036ffb710,0,1,0) at rt_match+0xbe sys/net/route.c:242
in_pcbselsrc(ffff800015b61d80,fffffd802ea49e20,fffffd8036ffb690) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934
in_pcbconnect(fffffd8036ffb690,fffffd802ea49e00) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492
udp_usrreq(fffffd802e251908,4,0,fffffd802ea49e00,0,ffff8000ffff2ee8) at udp_usrreq+0x560
sys_connect(ffff8000ffff2ee8,ffff800015b61f08,ffff800015b61f50) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388
syscall(ffff800015b61fd0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,fffffffffffffed2,0,3,a6ecc51e010) at Xsyscall+0x128
end of kernel
end trace frame: 0xa7188d73b30, count: 2
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.