kernel: 0 ageStopped at   savectx+0xae:   movl    $0,%gs:0x688
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 235070  95174      0           0  0x4000000    1K syz-executor
*208699  83709  60928        0x10          0    0  syz-executor
savectx() at savectx+0xae
end of kernel
end trace frame: 0x77f52910f5b0, count: 14
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{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu1: uvm_fault(0xfffff0006a767b90, 0x98, 0, 1) -> e
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x77f52910f5b0, count: -1
ddb{0}> show registers
rdi                                0
rsi                                0
rbp               0xffff80002a2bae00
rbx                                0
rdx                                0
rcx               0xffff8000fffe82b8
rax                             0x3c
r8                0xffff80002a2bad30
r9                                 0
r10               0x4b4863e670a623c0
r11               0xbce09e03cdd83bc0
r12                                0
r13                                0
r14               0xffff8000fffe82b8
r15                                0
rip               0xffffffff821e93ee    savectx+0xae
cs                               0x8
rflags                          0x46
rsp               0xffff80002a2bad80
ss                              0x10
savectx+0xae:   movl    $0,%gs:0x688
ddb{0}> show proc
PROC (syz-executor) tid=208699 pid=83709 tcnt=2 stat=onproc
    flags process=10<SUGID> proc=0
    runpri=80, usrpri=80, slppri=16, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff800031b8dcb0,0xffff8000fffe8a90
    process=0xffff8000fffe5360 user=0xffff80002a2b5000, vmspace=0xfffff0006a767d78
    estcpu=30, cpticks=6, pctcpu=0.0, user=5, sys=1, intr=0
ddb{0}>