login: panic: vmmaplk: lock not shared
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 141546  18841  32767        0x10          0    0  syz-executor1
*481721  18841  32767        0x10  0x4000000    1K syz-executor1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399
panic() at panic+0x16c sys/kern/subr_prf.c:208
_rw_exit_read(ffff800020bba720,2b0,ffff800020caaa78) at _rw_exit_read+0x12b sys/kern/kern_rwlock.c:355
uvm_fault(bb7a068215a8eb54,ffff800020bba720,0,ffffffff81d7f950) at uvm_fault+0x23bb uvmfault_unlockall sys/uvm/uvm_fault.c:1388 [inline]
uvm_fault(bb7a068215a8eb54,ffff800020bba720,0,ffffffff81d7f950) at uvm_fault+0x23bb sys/uvm/uvm_fault.c:1266
pageflttrap() at pageflttrap+0x216 sys/arch/amd64/amd64/trap.c:200
kerntrap(f36968e77958211b) at kerntrap+0xeb sys/arch/amd64/amd64/trap.c:294
alltraps_kern(6,4,80047462,0,fffffd806df68438,20000080) at alltraps_kern+0x7b
copyin(35dca4fcf05386f5,10,ffff800020bba720,14a33ad0628,0,360) at copyin+0x56
syscall(d64ee200b8cbf6f4) at syscall+0x5a0 mi_syscall sys/sys/syscall_mi.h:99 [inline]
syscall(d64ee200b8cbf6f4) at syscall+0x5a0 sys/arch/amd64/amd64/trap.c:583
Xsyscall(6,0,ffffffffffffff51,0,3,147eb9871a0) at Xsyscall+0x128
end of kernel
end trace frame: 0x14a33ad06b0, count: 5
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{1}> 
ddb{1}> set $lines = 0
ddb{1}>