uvm_fault(fffffd80647668a8,8000,0,2) at uvm_fault+0xf2 sys/uvm/uvm_fault.c:600
kpageflttrap(ffff80002f0c0220,8c00) at kpageflttrap+0x238 sys/arch/amd64/amd64/trap.c:279
kerntrap(ffff80002f0c0220) at kerntrap+0xf2 sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x57
syscall(ffff80002f0c0670) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff80002f0c0670) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5be5789cbc0, count: -21
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x1c:  addq    $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
witness_checkorder(fffffd806e2124e8,9,0) at witness_checkorder+0xd42
rw_enter(fffffd806e2124d8,1) at rw_enter+0xd1
rrw_enter(fffffd806e2124d8,1) at rrw_enter+0x91 sys/kern/kern_rwlock.c:464
VOP_LOCK(fffffd806949c008,2001) at VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
vn_lock(fffffd806949c008,2001) at vn_lock+0x85 sys/kern/vfs_vnops.c:564
vn_rdwr(0,fffffd806949c008,ffff800011a26880,1,0,1,f028d79dcf49e37e,0,ffff8000006aa000,0) at vn_rdwr+0xb6 sys/kern/vfs_vnops.c:320
vndstrategy(fffffd8066b0c120) at vndstrategy+0x3e2 sys/dev/vnd.c:342
physio(ffffffff8190a9f0,2902,8000,ffffffff81a30ff0,ffff80002a227d88) at physio+0x27d sys/kern/kern_physio.c:162
spec_read(ffff80002a227bf0) at spec_read+0x105 sys/kern/spec_vnops.c:215
VOP_READ(fffffd806f0c4eb8,ffff80002a227d88,0,fffffd807f7d33a8) at VOP_READ+0xc3 sys/kern/vfs_vops.c:227
vn_read(fffffd8055631558,ffff80002a227d88,1) at vn_read+0x115 sys/kern/vfs_vnops.c:369
dofilereadv(ffff80002a212cf0,4,ffff80002a227d88,1,ffff80002a227e40) at dofilereadv+0x1a1 sys/kern/sys_generic.c:247
sys_pread(ffff80002a212cf0,ffff80002a227ef0,ffff80002a227e40) at sys_pread+0x93 sys/kern/vfs_syscalls.c:3271
syscall(ffff80002a227ef0) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff80002a227ef0) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x947a8bf6ff0, count: -16