uvm_fault(fffffd80647c2198,7aa3694f000,0,1) at uvm_fault+0x238
upageflttrap(ffff80002c238760,7aa3694f04c) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002c238760) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffd6f70, count: -14
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
witness_checkorder(fffffd805bbea5f8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline]
witness_checkorder(fffffd805bbea5f8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105
rw_enter(fffffd805bbea5e8,81) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250
rrw_enter(fffffd805bbea5e8,81) at rrw_enter+0x8b sys/kern/kern_rwlock.c:465
VOP_LOCK(fffffd80683072d0,81) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
vn_lock(fffffd80683072d0,81) at vn_lock+0x84 sys/kern/vfs_vnops.c:567
uvn_io(fffffd8066ed0a28,ffff80002e5550a0,1,23,1) at uvn_io+0x338 sys/uvm/uvm_vnode.c:1234
uvm_pager_put(fffffd8066ed0a28,fffffd8007e32f20,ffff80002e555138,ffff80002e555178,23,0,18357e419fae5c00) at uvm_pager_put+0x137 sys/uvm/uvm_pager.c:541
uvn_flush(fffffd8066ed0a28,0,1000,3) at uvn_flush+0x532 sys/uvm/uvm_vnode.c:722
uvm_map_clean(fffffd80647c2758,20000000,20003000,3) at uvm_map_clean+0x72b sys/uvm/uvm_map.c:4788
syscall(ffff80002e555370) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e555370) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x80da4cb7810, count: -12