uvm_fault(fffffd806c169e70,8d26d7d1000,0,1) at uvm_fault+0xf2 sys/uvm/uvm_fault.c:601
upageflttrap(ffff800028608eb0,8d26d7d1040) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff800028608eb0) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffd65c0, 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(fffffd806f6eb3d0,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline]
witness_checkorder(fffffd806f6eb3d0,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105
rw_enter(fffffd806f6eb3c0,1) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250
rrw_enter(fffffd806f6eb3c0,1) at rrw_enter+0x8b sys/kern/kern_rwlock.c:465
VOP_LOCK(fffffd80675fa498,2001) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
vn_lock(fffffd80675fa498,2001) at vn_lock+0x84 sys/kern/vfs_vnops.c:564
vn_rdwr(0,fffffd80675fa498,ffff800008a43500,1,0,1,546ffeea0858d8ad,ffff8000006b6000,fffffd807cd38368,0) at vn_rdwr+0xb1 sys/kern/vfs_vnops.c:320
vndstrategy(fffffd807cd38368) at vndstrategy+0x3c4 sys/dev/vnd.c:342
physio(ffffffff82553020,2902,8000,ffffffff81b99160,ffff80002861c470) at physio+0x289 sys/kern/kern_physio.c:163
spec_read(ffff80002861c2d0) at spec_read+0xf9 sys/kern/spec_vnops.c:215
VOP_READ(fffffd806e372210,ffff80002861c470,0,fffffd807f7d7548) at VOP_READ+0xbf sys/kern/vfs_vops.c:227
vn_read(fffffd807cd3ad10,ffff80002861c470,1) at vn_read+0x126 sys/kern/vfs_vnops.c:369
dofilereadv(ffff8000212ead30,3,ffff80002861c470,1,ffff80002861c560) at dofilereadv+0x19e sys/kern/sys_generic.c:247
sys_pad_pread(ffff8000212ead30,ffff80002861c518,ffff80002861c560) at sys_pad_pread+0x92 sys_pread sys/kern/vfs_syscalls.c:3306 [inline]
sys_pad_pread(ffff8000212ead30,ffff80002861c518,ffff80002861c560) at sys_pad_pread+0x92 sys/kern/vfs_syscalls.c:3412
syscall(ffff80002861c5e0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002861c5e0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2a8340366b0, count: -16