uvm_fault(fffffd80693526e0,58308096000,0,2) at uvm_fault+0x238
upageflttrap(ffff800024731a20,58308096000) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:186
usertrap(ffff800024731a20) at usertrap+0x204 sys/arch/amd64/amd64/trap.c:438
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7fffff0bf0, count: -13
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(fffffd806e1afc58,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline]
witness_checkorder(fffffd806e1afc58,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105
rw_enter(fffffd806e1afc48,1) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250
rrw_enter(fffffd806e1afc48,1) at rrw_enter+0x8b sys/kern/kern_rwlock.c:465
VOP_LOCK(fffffd8066a26cc0,2001) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
vn_lock(fffffd8066a26cc0,2001) at vn_lock+0x84 sys/kern/vfs_vnops.c:564
vn_rdwr(0,fffffd8066a26cc0,ffff800008a43040,ec,0,1,b351155b5afefd86,ffff8000006b6000,fffffd8069896b68,0) at vn_rdwr+0xb1 sys/kern/vfs_vnops.c:320
vndstrategy(fffffd8069896b68) at vndstrategy+0x3c4 sys/dev/vnd.c:341
physio(ffffffff822df350,2902,8000,ffffffff820c59a0,ffff80002e3f97f8) at physio+0x289 sys/kern/kern_physio.c:163
spec_read(ffff80002e3f95d0) at spec_read+0xf9 sys/kern/spec_vnops.c:215
VOP_READ(fffffd806ee17b58,ffff80002e3f97f8,0,fffffd807f7d76e8) at VOP_READ+0xbf sys/kern/vfs_vops.c:227
vn_read(fffffd806b5febe8,ffff80002e3f97f8,1) at vn_read+0x126 sys/kern/vfs_vnops.c:369
dofilereadv(ffff800022d0e040,3,ffff80002e3f97f8,1,ffff80002e3f98f0) at dofilereadv+0x19e sys/kern/sys_generic.c:247
sys_pad_preadv(ffff800022d0e040,ffff80002e3f98a8,ffff80002e3f98f0) at sys_pad_preadv+0xb9 sys_preadv sys/kern/vfs_syscalls.c:3335 [inline]
sys_pad_preadv(ffff800022d0e040,ffff80002e3f98a8,ffff80002e3f98f0) at sys_pad_preadv+0xb9 sys/kern/vfs_syscalls.c:3425
syscall(ffff80002e3f9970) at syscall+0x57c mi_syscall sys/sys/syscall_mi.h:113 [inline]
syscall(ffff80002e3f9970) at syscall+0x57c sys/arch/amd64/amd64/trap.c:626
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x20611860da0, count: -16