uvm_fault(0xfffff4006d1a02f0, 0x6a72eed9, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      amap_lookups+0x1e0:     movl    0x10(%r15),%r14d
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
* 86034  38241      0           0          0    0  syz-executor
amap_lookups(fffff4006cf6a7f0,15000,ffff8000318b7090,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline]
amap_lookups(fffff4006cf6a7f0,15000,ffff8000318b7090,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168
uvm_fault_check(ffff8000318b7190,ffff8000318b71c8,ffff8000318b7200,0) at uvm_fault_check+0x840 sys/uvm/uvm_fault.c:840
uvm_fault(fffff4006d1a02f0,354046d0000,0,1) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627
upageflttrap(ffff8000318b7330,354046d09b0) at upageflttrap+0xa0 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000318b7330) at usertrap+0x413 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7838321213f0, count: 9
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> set $maxwidth = 0
ddb> show panic
*cpu0: uvm_fault(0xfffff4006d1a02f0, 0x6a72eed9, 0, 1) -> e
ddb> show kasan
No such command
ddb> trace
amap_lookups(fffff4006cf6a7f0,15000,ffff8000318b7090,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline]
amap_lookups(fffff4006cf6a7f0,15000,ffff8000318b7090,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168
uvm_fault_check(ffff8000318b7190,ffff8000318b71c8,ffff8000318b7200,0) at uvm_fault_check+0x840 sys/uvm/uvm_fault.c:840
uvm_fault(fffff4006d1a02f0,354046d0000,0,1) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627
upageflttrap(ffff8000318b7330,354046d09b0) at upageflttrap+0xa0 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000318b7330) at usertrap+0x413 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7838321213f0, count: -6
ddb> show registers
rdi                             0x11
rsi                             0x20
rbp               0xffff8000318b6fe0
rbx                              0x1
rdx                                0
rcx                              0x1
rax               0xffff800000c57e20
r8                0xffffffff83075d80    uvm_map_inentry_sp
r9                                 0
r10                                0
r11               0x15f5dbff728f7511
r12                             0x1d
r13                                0
r14                             0x20
r15                       0x6a72eec9
rip               0xffffffff81029930    amap_lookups+0x1e0
cs                               0x8
rflags                       0x10206    __ALIGN_SIZE+0xf206
rsp               0xffff8000318b6f50
ss                                 0
amap_lookups+0x1e0:     movl    0x10(%r15),%r14d
ddb>