uvm_fault(fffffd8077dd9370,20d0c000,0,1) at uvm_fault+0x129 sys/uvm/uvm_fault.c:605
kpageflttrap(ffff8000308fca30,20d0c000) at kpageflttrap+0x228 sys/arch/amd64/amd64/trap.c:279
kerntrap(ffff8000308fca30) at kerntrap+0xf2 sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x57
pipe_write(fffffd806b491908,ffff8000308fccf8,0) at pipe_write+0x36f sys/kern/sys_pipe.c:561
dofilewritev(ffff8000ffff4d00,2,ffff8000308fccf8,0,ffff8000308fcdb0) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375
sys_write(ffff8000ffff4d00,ffff8000308fce60,ffff8000308fcdb0) at sys_write+0x87 sys/kern/sys_generic.c:295
syscall(ffff8000308fce60) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff8000308fce60) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xbc5d46faba0, count: -19
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(fffffd80680c5808,9,0) at witness_checkorder+0xd42
rw_enter(fffffd80680c57f8,1) at rw_enter+0xd1
rrw_enter(fffffd80680c57f8,1) at rrw_enter+0x8e sys/kern/kern_rwlock.c:464
VOP_LOCK(fffffd8077ecfb58,2001) at VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
vn_lock(fffffd8077ecfb58,2001) at vn_lock+0x85 sys/kern/vfs_vnops.c:564
vn_rdwr(0,fffffd8077ecfb58,ffff800011a269c0,e8,0,1,1b807d580c567ffe,0,ffff8000006aa000,0) at vn_rdwr+0xb6 sys/kern/vfs_vnops.c:320
vndstrategy(fffffd80678f1698) at vndstrategy+0x3df sys/dev/vnd.c:342
physio(ffffffff820df470,2902,8000,ffffffff8211b470,ffff800031c03b90) at physio+0x27d sys/kern/kern_physio.c:162
spec_read(ffff800031c03980) at spec_read+0x102 sys/kern/spec_vnops.c:215
VOP_READ(fffffd80788b7eb8,ffff800031c03b90,0,fffffd807f7d7548) at VOP_READ+0xc3 sys/kern/vfs_vops.c:227
vn_read(fffffd806792d730,ffff800031c03b90,0) at vn_read+0x115 sys/kern/vfs_vnops.c:369
dofilereadv(ffff80002a21f4a8,3,ffff800031c03b90,0,ffff800031c03c50) at dofilereadv+0x1a1 sys/kern/sys_generic.c:247
sys_readv(ffff80002a21f4a8,ffff800031c03d00,ffff800031c03c50) at sys_readv+0xab sys/kern/sys_generic.c:194
syscall(ffff800031c03d00) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff800031c03d00) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x1fa94a88e30, count: -16