witness: lock order reversal: 1st 0xfffffd806f209820 fdlock (&newfdp->fd_fd.fd_lock) 2nd 0xfffffd806e33c4d8 inode (&ip->i_lock) lock order data w2 -> w1 missing lock order data w1 -> w2 missing Stopped at db_enter+0x18: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399 witness_checkorder(fffffd806e33c4d8,9,0) at witness_checkorder+0x10f3 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd806e33c4d8,9,0) at witness_checkorder+0x10f3 sys/kern/subr_witness.c:1105 rw_enter(fffffd806e33c4c8,81) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250 rrw_enter(fffffd806e33c4c8,81) at rrw_enter+0x8b sys/kern/kern_rwlock.c:461 VOP_LOCK(fffffd8065a15010,81) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:614 vn_lock(fffffd8065a15010,81) at vn_lock+0x84 sys/kern/vfs_vnops.c:579 uvn_get(fffffd8065b314e0,0,ffff800022b5b918,ffff800022b5b8e8,0,0) at uvn_get+0x256 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline] uvn_get(fffffd8065b314e0,0,ffff800022b5b918,ffff800022b5b8e8,0,0) at uvn_get+0x256 sys/uvm/uvm_vnode.c:993 uvm_fault_lower(ffff800022b5ba80,ffff800022b5bab8,ffff800022b5ba00,0) at uvm_fault_lower+0x302 sys/uvm/uvm_fault.c:1251 uvm_fault(fffffd806d5d2188,20000000,0,2) at uvm_fault+0x240 sys/uvm/uvm_fault.c:638 kpageflttrap(ffff800022b5bc10,20000040) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022b5bc10) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff800022b5be50) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022b5be50) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3bd352fd140, count: -15 ddb{1}> show registers rdi 0xffff8000224a4000 rsi 0x146e5 acpi_pdirpa+0x54d rbp 0xffff800022b5b590 rbx 0x3 rdx 0xffff8000224a4000 rcx 0x146e4 acpi_pdirpa+0x54c rax 0xffffffff818b7c17 db_enter+0x17 r8 0xffffffff81615aac witness_checkorder+0x10cc r9 0x5 r10 0x82601f1ad8552ea8 r11 0x11ddeca11b159df1 r12 0xfffffd8002dad7c0 r13 0 r14 0 r15 0 rip 0xffffffff818b7c18 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022b5b580 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=116167 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212a2d30,0xffffffff8287a320 process=0xffff800021261938 user=0xffff800022b56000, vmspace=0xfffffd806d5d2188 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49778 308371 73650 0 7 0 syz-executor.0 49778 3103 73650 0 3 0x4000080 fsleep syz-executor.0 *49778 116167 73650 0 7 0x4000000 syz-executor.0 42446 522054 0 0 3 0x14280 nfsidl nfsio 24751 112061 0 0 3 0x14280 nfsidl nfsio 28329 91813 0 0 3 0x14280 nfsidl nfsio 32449 338744 0 0 3 0x14280 nfsidl nfsio 87357 481713 0 0 3 0x14280 nfsidl nfsio 95204 133128 0 0 3 0x14280 nfsidl nfsio 77971 521900 0 0 3 0x14280 nfsidl nfsio 10454 20604 0 0 3 0x14280 nfsidl nfsio 80196 46800 0 0 3 0x14280 nfsidl nfsio 21115 499321 0 0 3 0x14280 nfsidl nfsio 57474 86238 0 0 3 0x14280 nfsidl nfsio 70196 144866 0 0 3 0x14280 nfsidl nfsio 24512 480733 0 0 3 0x14280 nfsidl nfsio 15102 42784 0 0 3 0x14280 nfsidl nfsio 10480 1074 0 0 3 0x14280 nfsidl nfsio 29806 178903 0 0 3 0x14280 nfsidl nfsio 92475 151336 0 0 3 0x14280 nfsidl nfsio 96235 434135 0 0 3 0x14280 nfsidl nfsio 53688 12289 0 0 3 0x14280 nfsidl nfsio 3241 393842 0 0 3 0x14280 nfsidl nfsio 34556 273459 1 0 3 0x100083 ttyin getty 40395 404566 45834 0 3 0x2 biowait syz-executor.1 73650 89577 45834 0 3 0x82 nanoslp syz-executor.0 11755 288193 0 0 3 0x14200 bored sosplice 45834 213524 63385 0 3 0x82 thrsleep syz-fuzzer 45834 422302 63385 0 3 0x4000082 nanoslp syz-fuzzer 45834 15772 63385 0 3 0x4000082 thrsleep syz-fuzzer 45834 234944 63385 0 3 0x4000082 thrsleep syz-fuzzer 45834 180077 63385 0 3 0x4000082 nanoslp syz-fuzzer 45834 146967 63385 0 3 0x4000082 thrsleep syz-fuzzer 45834 132756 63385 0 3 0x4000082 thrsleep syz-fuzzer 45834 205325 63385 0 3 0x4000082 kqread syz-fuzzer 63385 389777 28244 0 3 0x10008a sigsusp ksh 28244 265140 58916 0 3 0x9a select sshd 58916 118300 1 0 3 0x88 select sshd 48035 7058 33438 74 3 0x100092 bpf pflogd 33438 75072 1 0 3 0x80 netio pflogd 12736 505071 56073 73 3 0x100090 kqread syslogd 56073 378543 1 0 3 0x100082 netio syslogd 42636 300851 1 0 3 0x100080 kqread resolvd 93006 232981 39919 77 3 0x100092 kqread dhcpleased 26847 50181 39919 77 3 0x100092 kqread dhcpleased 39919 250491 1 0 3 0x80 kqread dhcpleased 876 310066 0 0 3 0x14200 bored smr 15724 174623 0 0 2 0x14200 zerothread 26049 162605 0 0 3 0x14200 aiodoned aiodoned 78621 248881 0 0 3 0x14200 syncer update 77763 182880 0 0 3 0x14200 cleaner cleaner 83363 367954 0 0 3 0x14200 reaper reaper 81497 61826 0 0 3 0x14200 pgdaemon pagedaemon 10550 187361 0 0 3 0x14200 bored crynlk 98036 263329 0 0 3 0x14200 bored crypto 63891 80402 0 0 3 0x14200 bored viomb 48450 413097 0 0 3 0x40014200 acpi0 acpi0 33751 296091 0 0 3 0x40014200 idle1 72588 56793 0 0 3 0x14200 bored softnet 60837 383418 0 0 3 0x14200 bored systqmp 98956 59285 0 0 3 0x14200 bored systq 72010 477696 0 0 3 0x40014200 bored softclock 66380 157127 0 0 3 0x40014200 idle0 1 137501 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 49778 (syz-executor.0) thread 0xffff8000212a3510 (116167) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8292bd50) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvm_fault+0x224 sys/uvm/uvm_fault.c:637 #2 kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 #3 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #4 alltraps_kern_meltdown+0x7b #5 copyout+0x53 #6 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #7 Xsyscall+0x128 exclusive rwlock fdlock r = 0 (0xfffffd806f209820) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 dopipe+0xd6 #2 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #3 Xsyscall+0x128 Process 40395 (syz-executor.1) thread 0xffff80002124f500 (404566) exclusive rrwlock inode r = 0 (0xfffffd806e3704e8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1350 #5 ffs_inode_alloc+0x1c3 sys/ufs/ffs/ffs_alloc.c:394 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:457 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3070 #9 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80665650a0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:614 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xdd sys/kern/vfs_lookup.c:413 #6 namei+0x55a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3055 #8 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 6458K 7070K 78643K 16778 0 pcb 13 8K 8K 78643K 191 0 rtable 116 4K 5K 78643K 472 0 ifaddr 81 15K 15K 78643K 244 0 sysctl 3 1K 1K 78643K 3 0 counters 44 34K 34K 78643K 98 0 ioctlops 0 0K 4K 78643K 1741 0 iov 0 0K 16K 78643K 218 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 6 0 vnodes 1226 77K 78K 78643K 2885 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 17 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 959 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 7861 0 sigio 0 0K 0K 78643K 73 0 proc 79 88K 112K 78643K 624 0 subproc 32 2K 2K 78643K 70 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 358 0 in_multi 33 2K 2K 78643K 163 0 ether_multi 1 0K 0K 78643K 25 0 mrt 1 0K 0K 78643K 17 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 2K 78643K 631 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 306 229K 229K 78643K 96884 0 UVM aobj 41 4K 4K 78643K 49 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 153 0 NDP 15 0K 0K 78643K 54 0 temp 143 4210K 8301K 78643K 29606 0 kqueue 10 14K 26K 78643K 167 0 SYN cache 2 16K 24K 78643K 3 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 134 0 131 1 0 1 1 0 8 0 rtentry 112 125 0 78 2 0 2 2 0 8 0 unpcb 120 1260 0 1241 2 1 1 2 0 8 0 syncache 296 39 0 39 7 7 0 1 0 8 0 tcpqe 32 140 0 140 11 11 0 1 0 8 0 tcpcb 736 791 0 787 18 17 1 5 0 8 0 arp 120 22 0 15 1 0 1 1 0 8 0 inpcb 304 1914 0 1903 7 5 2 3 0 8 0 rttmr 72 9 0 9 4 4 0 1 0 8 0 nd6 48 20 0 12 1 0 1 1 0 8 0 pkpcb 40 24 0 24 6 6 0 1 0 8 0 kcovpl 48 4 0 2 1 0 1 1 0 8 0 ppxss 1248 4 0 4 3 3 0 1 0 8 0 pffrag 232 2 0 1 2 1 1 1 0 482 0 pffrnode 88 2 0 1 2 1 1 1 0 8 0 pffrent 40 11 0 10 4 3 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 11 0 11 2 2 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 264 13 0 13 1 1 0 1 0 8 0 pfstitem 24 106 0 99 1 0 1 1 0 8 0 pfstkey 112 106 0 99 1 0 1 1 0 8 0 pfstate 320 106 0 99 6 3 3 3 0 8 0 pfrule 1360 41 0 36 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 432 0 234 15 2 13 14 0 8 0 art_table 32 433 0 234 2 0 2 2 0 8 0 art_node 16 122 0 79 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 12 1 0 1 1 0 8 0 semapl 112 957 0 947 1 0 1 1 0 8 0 shmpl 112 46 0 8 3 1 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 10544 0 9135 89 0 89 89 0 8 0 ffsino 272 10544 0 9135 95 0 95 95 0 8 0 nchpl 144 19613 0 18011 61 0 61 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 46050 0 46049 1 0 1 1 0 8 0 percpumem 16 61 0 27 1 0 1 1 0 8 0 vcpupl 1984 20 0 0 3 0 3 3 0 8 0 vmpool 560 20 0 0 2 0 2 2 0 8 0 pfiaddrpl 120 2 0 2 1 1 0 1 0 8 0 scsiplug 72 5 0 5 2 2 0 1 0 8 0 scxspl 216 67389 0 67388 14 13 1 8 0 8 0 plimitpl 152 117 0 108 1 0 1 1 0 8 0 sigapl 424 8128 0 8073 8 1 7 7 0 8 0 futexpl 56 53955 0 53954 1 0 1 1 0 8 0 knotepl 112 56 0 0 2 0 2 2 0 8 0 kqueuepl 216 5742 0 5724 2 0 2 2 0 8 0 pipepl 336 373 0 360 13 11 2 2 0 8 0 fdescpl 496 8091 0 8073 3 0 3 3 0 8 0 filepl 152 24107 0 23985 9 4 5 6 0 8 0 lockfpl 104 920 0 917 1 0 1 1 0 8 0 lockfspl 48 394 0 391 1 0 1 1 0 8 0 sessionpl 144 22 0 11 1 0 1 1 0 8 0 pgrppl 48 27 0 16 1 0 1 1 0 8 0 ucredpl 96 1862 0 1849 1 0 1 1 0 8 0 zombiepl 144 8073 0 8073 1 0 1 1 0 8 1 processpl 1072 8128 0 8073 4 0 4 4 0 8 0 procpl 672 18187 0 18123 15 9 6 6 0 8 0 sosppl 168 28 0 28 6 6 0 1 0 8 0 sockpl 480 3373 0 3344 14 8 6 7 0 8 0 mcl64k 65536 23 0 0 3 0 3 3 0 8 0 mcl16k 16384 20 0 0 3 1 2 3 0 8 0 mcl12k 12288 27 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 429 0 0 26 0 26 26 0 8 0 mtagpl 96 265 0 0 5 0 5 5 0 8 0 mbufpl 256 1190 0 0 60 0 60 60 0 8 0 bufpl 280 18280 0 11944 453 0 453 453 0 8 0 anonpl 24 2084769 0 2072868 134 56 78 92 0 186 3 amapchunkpl 152 229091 0 228652 45 26 19 32 0 158 1 amappl16 200 14141 0 13711 41 16 25 32 0 8 2 amappl14 184 9 0 2 1 0 1 1 0 8 0 amappl13 176 1704 0 1700 1 0 1 1 0 8 0 amappl12 168 3 0 2 1 0 1 1 0 8 0 amappl11 160 2373 0 2359 1 0 1 1 0 8 0 amappl10 152 1356 0 1349 1 0 1 1 0 8 0 amappl9 144 16 0 13 1 0 1 1 0 8 0 amappl8 136 3149 0 3033 5 0 5 5 0 8 0 amappl7 128 2626 0 2608 1 0 1 1 0 8 0 amappl6 120 149 0 131 1 0 1 1 0 8 0 amappl5 112 8186 0 8165 1 0 1 1 0 8 0 amappl4 104 3030 0 2997 1 0 1 1 0 8 0 amappl3 96 1863 0 1858 1 0 1 1 0 8 0 amappl2 88 2227 0 2164 2 0 2 2 0 8 0 amappl1 80 138794 0 138346 13 3 10 13 0 8 0 amappl 88 95992 0 95838 4 0 4 4 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 48 0 8 1 0 1 1 0 8 0 uaddrrnd 24 8111 0 8073 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 8111 0 8073 1 0 1 1 0 8 0 vmmpekpl 168 44780 0 44748 2 0 2 2 0 8 0 vmmpepl 168 906644 0 904757 121 32 89 97 0 357 2 vmsppl 368 8110 0 8073 4 0 4 4 0 8 0 rwobjpl 56 156517 0 155240 25 6 19 21 0 8 0 pdppl 4096 16230 0 16166 83 17 66 67 0 8 2 pvpl 32 4888522 0 4872979 285 145 140 154 0 265 8 pmappl 224 8110 0 8073 4 1 3 3 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 425 0 51 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff827eaff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:353 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff8292bb48) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8292bb48) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff800022ad1b20,ffff80000006a400) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x18f end of kernel end trace frame: 0x7f7ffffe2b30, count: -6 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:399 witness_checkorder(fffffd806e33c4d8,9,0) at witness_checkorder+0x10f3 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd806e33c4d8,9,0) at witness_checkorder+0x10f3 sys/kern/subr_witness.c:1105 rw_enter(fffffd806e33c4c8,81) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250 rrw_enter(fffffd806e33c4c8,81) at rrw_enter+0x8b sys/kern/kern_rwlock.c:461 VOP_LOCK(fffffd8065a15010,81) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:614 vn_lock(fffffd8065a15010,81) at vn_lock+0x84 sys/kern/vfs_vnops.c:579 uvn_get(fffffd8065b314e0,0,ffff800022b5b918,ffff800022b5b8e8,0,0) at uvn_get+0x256 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline] uvn_get(fffffd8065b314e0,0,ffff800022b5b918,ffff800022b5b8e8,0,0) at uvn_get+0x256 sys/uvm/uvm_vnode.c:993 uvm_fault_lower(ffff800022b5ba80,ffff800022b5bab8,ffff800022b5ba00,0) at uvm_fault_lower+0x302 sys/uvm/uvm_fault.c:1251 uvm_fault(fffffd806d5d2188,20000000,0,2) at uvm_fault+0x240 sys/uvm/uvm_fault.c:638 kpageflttrap(ffff800022b5bc10,20000040) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022b5bc10) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff800022b5be50) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022b5be50) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3bd352fd140, count: -15