panic: pool_get(vmmpepl): free list modified: 
   magic=1363d1b8; page 0xaab9000; item addr 0xaab99e0

stopped in pid 14753 (troff) at cpu_Debugger+0x14:	addi	1,1,16
db> trace
at panic+12c
at pool_get+438
at uvm_map_clip_start+1b4
at uvm_unmap_remove+284
at sys_munmap+dc
at syscall_plain+1d0
at syscalltrap+cc
at end+4139fd94
at end+
....