witness: lock order reversal: 1st 0xffffffff828f72c0 pf_lock (pf_lock) 2nd 0xffffffff829a29b0 netlock (netlock) lock order "netlock"(rwlock) -> "pf_lock"(rwlock) first seen at: #0 rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 #1 pfioctl+0x3fba sys/net/pf_ioctl.c:2966 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 lock order "pf_lock"(rwlock) -> "netlock"(rwlock) first seen at: #0 rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 #1 uvn_io+0x418 sys/uvm/uvm_vnode.c:1243 #2 uvn_get+0x1df sys/uvm/uvm_vnode.c:1076 #3 uvm_fault_lower+0x36c sys/uvm/uvm_fault.c:1275 #4 uvm_fault+0x248 #5 kpageflttrap+0x209 #6 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #7 alltraps_kern_meltdown+0x7b #8 copyin+0x53 #9 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #10 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #11 sys_ioctl+0x4a2 #12 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #12 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #13 Xsyscall+0x128 Stopped at db_enter+0x18: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(ffffffff829a29b0,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffffffff829a29b0,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_write(ffffffff829a29a0) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 uvn_io(fffffd806e104b98,ffff80002e348cc8,1,202,0) at uvn_io+0x418 sys/uvm/uvm_vnode.c:1243 uvn_get(fffffd806e104b98,1000,ffff80002e348d88,ffff80002e348d58,0,1,4da0a0ac40a24451,0) at uvn_get+0x1df sys/uvm/uvm_vnode.c:1076 uvm_fault_lower(ffff80002e348ef0,ffff80002e348f28,ffff80002e348e70,0) at uvm_fault_lower+0x36c sys/uvm/uvm_fault.c:1275 uvm_fault(fffffd807efffe60,20001000,0,1) at uvm_fault+0x248 kpageflttrap(ffff80002e349080,20001000) at kpageflttrap+0x209 kerntrap(ffff80002e349080) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 VOP_IOCTL(fffffd806f6d0c68,c0104453,ffff80002e349460,3,fffffd807f7d8720,ffff80002e333268) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8067372868,c0104453,ffff80002e349460,ffff80002e333268) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002e333268,ffff80002e349578,ffff80002e3495d0) at sys_ioctl+0x4a2 syscall(ffff80002e349640) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e349640) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x83810990430, count: -16 ddb{0}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be68 rbp 0xffff80002e348a90 rbx 0x3 rdx 0xffff800000bed700 rcx 0 rax 0x3ffff acpi_pdirpa+0x2be67 r8 0xffff80002e348a00 r9 0x8080808080808080 r10 0xb85de5728ec4169d r11 0xac3cb20e8ce4c8cb r12 0xffffffff82b286c0 w_lodata+0x52a10 r13 0 r14 0xffffffff82b17f70 w_lodata+0x422c0 r15 0xfffffd8002f4c780 rip 0xffffffff821873b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e348a80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.5) pid=128775 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80002e332d28,0xffff80002e3327f8 process=0xffff8000fffefa48 user=0xffff80002e344000, vmspace=0xfffffd807efffe60 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 41637 146471 87521 0 2 0 syz-executor.1 41637 409440 87521 0 3 0x4000080 fsleep syz-executor.1 41637 15775 87521 0 3 0x4000080 fsleep syz-executor.1 52059 510440 32927 0 2 0 syz-executor.0 52059 475266 32927 0 2 0x4000000 syz-executor.0 52059 498862 32927 0 2 0x4000000 syz-executor.0 78197 424993 28372 0 2 0 syz-executor.3 78197 463659 28372 0 3 0x4000080 kqread syz-executor.3 78197 475317 28372 0 3 0x4000080 fsleep syz-executor.3 79400 399608 91451 0 7 0 syz-executor.5 *79400 128775 91451 0 7 0x4000000 syz-executor.5 40763 108988 28841 0 2 0 syz-executor.6 10242 454488 22622 0 2 0 syz-executor.4 67476 504236 45760 0 3 0x80 nanoslp syz-executor.2 67476 483273 45760 0 3 0x4000080 netcon syz-executor.2 67476 318615 45760 0 3 0x4000080 fsleep syz-executor.2 28372 192429 90237 0 3 0x82 nanoslp syz-executor.3 91451 27809 90237 0 3 0x82 nanoslp syz-executor.5 22622 228292 90237 0 2 0x2 syz-executor.4 87521 361916 90237 0 3 0x82 nanoslp syz-executor.1 96476 279858 90237 0 3 0x2 biowait syz-executor.7 32927 29949 90237 0 3 0x82 nanoslp syz-executor.0 29937 405734 0 0 3 0x14200 acct acct 22634 135692 0 0 3 0x14200 bored sosplice 28841 332946 90237 0 3 0x82 nanoslp syz-executor.6 45760 381187 90237 0 3 0x82 nanoslp syz-executor.2 90237 216230 86502 0 3 0x82 thrsleep syz-fuzzer 90237 7094 86502 0 3 0x4000082 nanoslp syz-fuzzer 90237 436303 86502 0 3 0x4000082 thrsleep syz-fuzzer 90237 511281 86502 0 3 0x4000082 thrsleep syz-fuzzer 90237 469532 86502 0 3 0x4000082 thrsleep syz-fuzzer 90237 453852 86502 0 3 0x4000082 thrsleep syz-fuzzer 90237 331206 86502 0 3 0x4000082 kqread syz-fuzzer 90237 421478 86502 0 3 0x4000082 thrsleep syz-fuzzer 90237 272796 86502 0 3 0x4000082 thrsleep syz-fuzzer 86502 61497 74032 0 3 0x10008a sigsusp ksh 74032 460408 78647 0 3 0x9a kqread sshd 36291 311487 1 0 3 0x100083 ttyin getty 78647 98480 1 0 3 0x88 kqread sshd 72819 492856 24869 74 3 0x1100092 bpf pflogd 24869 514586 1 0 3 0x80 netio pflogd 84515 174573 67986 73 3 0x1100090 kqread syslogd 67986 52042 1 0 3 0x100082 netio syslogd 54340 379982 1 0 3 0x100080 kqread resolvd 98366 42662 92150 77 3 0x100092 kqread dhcpleased 34408 464554 92150 77 3 0x100092 kqread dhcpleased 92150 75257 1 0 3 0x80 kqread dhcpleased 85153 246106 0 0 3 0x14200 bored smr 81903 228037 0 0 2 0x14200 zerothread 28253 153956 0 0 3 0x14200 aiodoned aiodoned 14164 32618 0 0 3 0x14200 syncer update 25436 497840 0 0 3 0x14200 cleaner cleaner 75440 181613 0 0 3 0x14200 reaper reaper 57089 270831 0 0 3 0x14200 pgdaemon pagedaemon 82863 511709 0 0 3 0x14200 bored viomb 13519 422375 0 0 3 0x40014200 acpi0 acpi0 40563 286013 0 0 3 0x40014200 idle1 52610 362057 0 0 3 0x14200 bored softnet 70307 25417 0 0 3 0x14200 bored systqmp 99375 338160 0 0 3 0x14200 bored systq 37721 489208 0 0 3 0x40014200 bored softclock 161 370220 0 0 3 0x40014200 idle0 1 415852 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 79400 (syz-executor.5) thread 0xffff80002e333268 (128775) exclusive rwlock pf_lock r = 0 (0xffffffff828f72c0) #0 witness_lock+0x44d #1 pfioctl+0x47e7 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b36548) #0 witness_lock+0x44d #1 vn_ioctl+0x41 sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x4a2 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 Process 96476 (syz-executor.7) thread 0xffff80002e333ce8 (279858) exclusive rrwlock inode r = 0 (0xfffffd8067839810) #0 witness_lock+0x44d #1 rw_enter+0x3e1 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:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80677745f8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 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:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 6588K 7539K 78643K 25735 0 pcb 13 14K 16K 78643K 842 0 rtable 229 19K 21K 78643K 1207 0 ifaddr 95 20K 22K 78643K 771 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 35K 78643K 276 0 ioctlops 0 0K 4K 78643K 3863 0 iov 0 0K 16K 78643K 512 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1404 88K 88K 78643K 7060 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 48 0 VM map 2 1K 1K 78643K 2 0 sem 19 2K 3K 78643K 220 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 85K 78643K 5414 0 sigio 0 0K 0K 78643K 264 0 proc 72 87K 124K 78643K 1080 0 subproc 104 6K 6K 78643K 301 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 136 0 in_multi 84 5K 7K 78643K 409 0 ether_multi 1 0K 0K 78643K 65 0 mrt 1 0K 0K 78643K 22 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 1863 0 pfkey data 0 0K 1K 78643K 14 0 tdb 3 0K 0K 78643K 3 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 439 404K 404K 78643K 70566 0 UVM aobj 108 8K 8K 78643K 124 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 323 0 NDP 13 0K 2K 78643K 172 0 temp 147 4727K 4801K 78643K 73989 0 kqueue 14 22K 28K 78643K 1129 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 120 308 0 305 5 4 1 3 0 8 0 rtentry 112 320 0 229 4 0 4 4 0 8 0 unpcb 136 3071 0 3054 42 41 1 9 0 8 0 syncache 296 26 0 26 6 6 0 1 0 8 0 tcpqe 32 115 0 115 4 4 0 1 0 8 0 tcpcb 736 1810 0 1800 77 75 2 13 0 8 0 arp 120 51 0 35 1 0 1 1 0 8 0 inpcb 304 4465 0 4457 74 68 6 11 0 8 5 rttmr 72 6 0 6 2 2 0 1 0 8 0 ip6q 72 4 0 4 1 1 0 1 0 8 0 ip6af 40 12 0 12 1 1 0 1 0 8 0 nd6 48 77 0 56 1 0 1 1 0 8 0 pkpcb 40 78 0 78 4 4 0 1 0 8 0 kcovpl 48 23 0 15 1 0 1 1 0 8 0 ppxss 1248 80 0 80 4 3 1 1 0 8 1 pfstscr 40 46 0 46 4 4 0 1 0 8 0 pffrag 232 43 0 39 2 1 1 1 0 482 0 pffrnode 88 43 0 39 2 1 1 1 0 8 0 pffrent 40 412 0 408 4 3 1 1 0 8 0 pfosfp 40 1430 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1430 0 714 21 0 21 21 0 8 0 pfrktable 1344 76 0 67 4 3 1 2 0 8 0 pftag 88 9 0 0 1 0 1 1 0 8 0 pfqueue 264 3 0 3 1 1 0 1 0 8 0 pfstitem 24 102 0 99 1 0 1 1 0 8 0 pfstkey 112 194 0 191 2 1 1 2 0 8 0 pfstate 320 142 0 139 4 3 1 4 0 8 0 pfrule 1360 345 0 308 5 1 4 4 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1314 0 907 32 4 28 30 0 8 0 art_table 32 1315 0 907 4 0 4 4 0 8 0 art_node 16 316 0 236 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 14 1 0 1 1 0 8 0 semapl 112 214 0 197 1 0 1 1 0 8 0 shmpl 112 121 0 16 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8493 0 7041 92 0 92 92 0 8 0 ffsino 272 8493 0 7041 98 0 98 98 0 8 0 nchpl 144 15529 0 13910 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 57612 0 57612 4 3 1 2 0 8 1 percpumem 16 150 0 110 1 0 1 1 0 8 0 vcpupl 2048 19 0 0 3 0 3 3 0 8 0 vmpool 560 23 0 4 2 0 2 2 0 8 0 pfiaddrpl 120 26 0 15 3 2 1 1 0 8 0 scxspl 216 48633 0 48632 17 14 3 4 0 8 2 plimitpl 152 901 0 886 1 0 1 1 0 8 0 sigapl 424 5709 0 5663 8 1 7 8 0 8 0 futexpl 64 50365 0 50361 3 2 1 1 0 8 0 knotepl 120 263 0 0 6 0 6 6 0 8 0 kqueuepl 216 1895 0 1884 23 22 1 5 0 8 0 pipepl 336 2897 0 2869 53 50 3 13 0 8 0 fdescpl 496 5673 0 5643 5 1 4 5 0 8 0 filepl 152 41860 0 41613 87 72 15 22 0 8 5 lockfpl 104 1674 0 1672 5 3 2 2 0 8 1 lockfspl 48 360 0 358 1 0 1 1 0 8 0 sessionpl 144 39 0 22 1 0 1 1 0 8 0 pgrppl 48 62 0 45 1 0 1 1 0 8 0 ucredpl 96 4433 0 4417 1 0 1 1 0 8 0 zombiepl 144 5663 0 5663 1 0 1 1 0 8 1 processpl 1064 5709 0 5663 5 0 5 5 0 8 0 procpl 672 16211 0 16148 17 10 7 9 0 8 0 srpgc 96 16 0 16 3 3 0 1 0 8 0 sosppl 168 47 0 47 5 5 0 1 0 8 0 sockpl 480 7989 0 7961 189 177 12 34 0 8 8 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 236 0 0 25 1 24 25 0 8 0 mtagpl 96 494 0 0 10 0 10 10 0 8 0 mbufpl 256 4987 0 0 301 0 301 301 0 8 0 bufpl 288 13168 0 6832 453 0 453 453 0 8 0 anonpl 24 1594482 0 1574639 230 87 143 151 0 186 12 amapchunkpl 152 169905 0 169005 70 32 38 48 0 158 1 amappl16 200 14695 0 14103 88 48 40 45 0 8 7 amappl15 192 879 0 872 1 0 1 1 0 8 0 amappl14 184 7 0 4 1 0 1 1 0 8 0 amappl13 176 938 0 932 1 0 1 1 0 8 0 amappl12 168 990 0 986 1 0 1 1 0 8 0 amappl11 160 669 0 651 1 0 1 1 0 8 0 amappl10 152 1462 0 1453 1 0 1 1 0 8 0 amappl9 144 1050 0 1046 1 0 1 1 0 8 0 amappl8 136 1116 0 1015 4 0 4 4 0 8 0 amappl7 128 272 0 261 1 0 1 1 0 8 0 amappl6 120 843 0 815 2 1 1 2 0 8 0 amappl5 112 5931 0 5912 1 0 1 1 0 8 0 amappl4 104 1916 0 1889 2 0 2 2 0 8 0 amappl3 96 1760 0 1745 1 0 1 1 0 8 0 amappl2 88 2390 0 2334 3 1 2 3 0 8 0 amappl1 80 104594 0 104010 20 6 14 19 0 8 0 amappl 88 69732 0 69444 8 0 8 8 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 72 123 0 16 2 0 2 2 0 8 0 uaddrrnd 24 5696 0 5647 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5696 0 5647 1 0 1 1 0 8 0 vmmpekpl 168 56440 0 56381 3 0 3 3 0 8 0 vmmpepl 168 521008 0 518328 192 68 124 138 0 357 1 vmsppl 368 5695 0 5647 5 0 5 5 0 8 0 rwobjpl 56 131735 0 124046 118 7 111 112 0 8 1 pdppl 4096 11399 0 11313 283 195 88 88 0 8 2 pvpl 32 2757539 0 2733160 386 159 227 267 0 265 17 pmappl 248 5695 0 5647 4 0 4 4 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1451 0 332 33 0 33 33 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(ffffffff829a29b0,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffffffff829a29b0,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_write(ffffffff829a29a0) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 uvn_io(fffffd806e104b98,ffff80002e348cc8,1,202,0) at uvn_io+0x418 sys/uvm/uvm_vnode.c:1243 uvn_get(fffffd806e104b98,1000,ffff80002e348d88,ffff80002e348d58,0,1,4da0a0ac40a24451,0) at uvn_get+0x1df sys/uvm/uvm_vnode.c:1076 uvm_fault_lower(ffff80002e348ef0,ffff80002e348f28,ffff80002e348e70,0) at uvm_fault_lower+0x36c sys/uvm/uvm_fault.c:1275 uvm_fault(fffffd807efffe60,20001000,0,1) at uvm_fault+0x248 kpageflttrap(ffff80002e349080,20001000) at kpageflttrap+0x209 kerntrap(ffff80002e349080) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 VOP_IOCTL(fffffd806f6d0c68,c0104453,ffff80002e349460,3,fffffd807f7d8720,ffff80002e333268) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8067372868,c0104453,ffff80002e349460,ffff80002e333268) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002e333268,ffff80002e349578,ffff80002e3495d0) at sys_ioctl+0x4a2 syscall(ffff80002e349640) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e349640) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x83810990430, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff82b36340) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b36340) at __mp_lock+0x129 sys/kern/kern_lock.c:147 syscall(ffff80002507ed40) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002507ed40) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb5f0, count: -6