uvm_fault(fffffd806a348c68,4a54ba22000,0,2) at uvm_fault+0x159 sys/uvm/uvm_fault.c:605
upageflttrap(ffff8000369a7c30,4a54ba22000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff8000369a7c30) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7d0100ee2d80, count: -13
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
witness_checkorder(fffffd806e07b708,9,0) at witness_checkorder+0x1047
rw_enter(fffffd806e07b6f8,1) at rw_enter+0x122
rrw_enter(fffffd806e07b6f8,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464
VOP_LOCK(fffffd805f7672a0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd805f7672a0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564
vn_rdwr(0,fffffd805f7672a0,ffff800011a26080,1f,0,1,fe4d5471bc86a07c,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320
vndstrategy(fffffd807818de70) at vndstrategy+0x4ff sys/dev/vnd.c:342
physio(ffffffff81206c10,2902,8000,ffffffff817cdc60,ffff8000371d1360) at physio+0x2f6 sys/kern/kern_physio.c:162
spec_read(ffff8000371d1150) at spec_read+0x155 sys/kern/spec_vnops.c:215
VOP_READ(fffffd806de24eb8,ffff8000371d1360,0,fffffd807f7d37b8) at VOP_READ+0x102 sys/kern/vfs_vops.c:227
vn_read(fffffd806a29e318,ffff8000371d1360,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369
dofilereadv(ffff800035f9af58,4,ffff8000371d1360,0,ffff8000371d1420) at dofilereadv+0x230 sys/kern/sys_generic.c:252
sys_readv(ffff800035f9af58,ffff8000371d14d0,ffff8000371d1420) at sys_readv+0xd8 sys/kern/sys_generic.c:199
syscall(ffff8000371d14d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff8000371d14d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4a4a3c0cb70, count: -16