uvm_fault(fffffd806751a8c0,6d008d09000,0,2) at uvm_fault+0x129 sys/uvm/uvm_fault.c:606
upageflttrap(ffff8000247c75a0,6d008d09000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff8000247c75a0) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:417
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffbea80, 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(fffffd80684211a8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline]
witness_checkorder(fffffd80684211a8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105
rw_enter(fffffd8068421198,1) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250
rrw_enter(fffffd8068421198,1) at rrw_enter+0x8b sys/kern/kern_rwlock.c:465
VOP_LOCK(fffffd8076f3acd8,2001) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
vn_lock(fffffd8076f3acd8,2001) at vn_lock+0x84 sys/kern/vfs_vnops.c:564
vn_rdwr(0,fffffd8076f3acd8,ffff800008a43100,43,0,1,3bfb366809bdfef9,ffff8000006b6000,fffffd8067842008,0) at vn_rdwr+0xb1 sys/kern/vfs_vnops.c:320
vndstrategy(fffffd8067842008) at vndstrategy+0x3c4 sys/dev/vnd.c:341
physio(ffffffff8149e260,2902,8000,ffffffff810dc870,ffff80002e50b660) at physio+0x289 sys/kern/kern_physio.c:163
spec_read(ffff80002e50b440) at spec_read+0xf9 sys/kern/spec_vnops.c:215
VOP_READ(fffffd806ed73a80,ffff80002e50b660,0,fffffd807f7d76e8) at VOP_READ+0xbf sys/kern/vfs_vops.c:227
vn_read(fffffd8067cf4018,ffff80002e50b660,0) at vn_read+0x126 sys/kern/vfs_vnops.c:369
dofilereadv(ffff80002132a7e0,4,ffff80002e50b660,0,ffff80002e50b750) at dofilereadv+0x19e sys/kern/sys_generic.c:247
sys_readv(ffff80002132a7e0,ffff80002e50b708,ffff80002e50b750) at sys_readv+0xa7 sys/kern/sys_generic.c:194
syscall(ffff80002e50b7d0) at syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e50b7d0) at syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x31016fda830, count: -16