witness: lock order reversal: 1st 0xffffffff8290fe50 netlock (netlock) 2nd 0xfffffd8063ac4030 vmmaplk (&map->lock) lock order "&map->lock"(rwlock) -> "netlock"(rwlock) first seen at: #0 rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 #1 udp_sysctl+0x8a sys/netinet/udp_usrreq.c:1269 #2 sys_sysctl+0x209 sys/kern/kern_sysctl.c:249 #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 lock order "netlock"(rwlock) -> "&map->lock"(rwlock) first seen at: #0 rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 kpageflttrap+0x209 #5 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #6 alltraps_kern_meltdown+0x7b #7 copyout+0x53 #8 ifioctl_get+0x2dd #9 soo_ioctl+0x26c #10 sys_ioctl+0x4a2 #11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #12 Xsyscall+0x128 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:440 witness_checkorder(fffffd8063ac4030,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd8063ac4030,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd8063ac4020) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002e19e080,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff80002e19e080,ffff80002e19e0b8,ffff80002e19e0e0) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd8063ac4018,20000000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff80002e19e210,20000300) at kpageflttrap+0x209 kerntrap(ffff80002e19e210) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 ifioctl_get(c0106924,ffff80002e19e4c0) at ifioctl_get+0x2dd soo_ioctl(fffffd806c71ed28,c0106924,ffff80002e19e4c0,ffff8000ffff6fd0) at soo_ioctl+0x26c sys_ioctl(ffff8000ffff6fd0,ffff80002e19e5d8,ffff80002e19e630) at sys_ioctl+0x4a2 syscall(ffff80002e19e6a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e19e6a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ca2b7b70a0, count: -15 ddb{1}> show registers rdi 0x3 rsi 0xffffffff8294abb0 __sancov_gen_cov_switch_values.134 rbp 0xffff80002e19dd70 rbx 0x3 rdx 0 rcx 0 rax 0xffff8000ffff6fd0 r8 0xffff80002e19dce0 r9 0x8080808080808080 r10 0xc2139af07992628f r11 0x9216b08e20beb23a r12 0xffffffff82ab0010 w_lodata+0x526a0 r13 0 r14 0xffffffff82aa36a0 w_lodata+0x45d30 r15 0xfffffd8002f62d80 rip 0xffffffff8138d658 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e19dd60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=164439 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff6010,0xffff800021212020 process=0xffff8000fffef200 user=0xffff80002e199000, vmspace=0xfffffd8063ac4018 estcpu=33, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37491 281983 7729 32767 2 0x10 syz-executor.3 37491 172863 7729 32767 3 0x4000090 fsleep syz-executor.3 37491 507987 7729 32767 3 0x4000010 biowait syz-executor.3 37491 213150 7729 32767 3 0x4000090 fsleep syz-executor.3 77683 227512 43045 32767 2 0x10 syz-executor.4 63364 351972 22107 32767 3 0x90 nanoslp syz-executor.6 63364 352043 22107 32767 3 0x4000090 fsleep syz-executor.6 63364 504752 22107 32767 3 0x4000090 fsleep syz-executor.6 63364 460708 22107 32767 3 0x4000090 fsleep syz-executor.6 85746 388416 39793 32767 2 0x10 syz-executor.1 *85746 164439 39793 32767 7 0x4000010 syz-executor.1 94718 40851 75426 32767 2 0x10 syz-executor.5 94718 27189 75426 32767 2 0x4000010 syz-executor.5 39793 351712 71944 32767 3 0x90 nanoslp syz-executor.1 71944 173225 91616 0 3 0x82 wait syz-executor.1 7729 347572 30339 32767 3 0x90 nanoslp syz-executor.3 30339 468631 91616 0 3 0x82 wait syz-executor.3 21154 14399 92947 32767 3 0x90 nanoslp syz-executor.7 92947 342112 91616 0 3 0x82 wait syz-executor.7 22107 148141 5038 32767 3 0x90 nanoslp syz-executor.6 5038 285488 91616 0 3 0x82 wait syz-executor.6 32274 159606 0 0 3 0x14200 bored sosplice 75426 279849 8937 32767 3 0x90 nanoslp syz-executor.5 8937 109904 91616 0 3 0x82 wait syz-executor.5 43045 78804 58048 32767 3 0x90 nanoslp syz-executor.4 27498 120314 54681 32767 2 0x10 syz-executor.2 58048 422556 91616 0 3 0x82 wait syz-executor.4 54681 84893 91616 0 3 0x82 wait syz-executor.2 96430 4633 29699 32767 2 0x10 syz-executor.0 29699 342223 91616 0 3 0x82 wait syz-executor.0 91616 191155 98156 0 3 0x82 thrsleep syz-fuzzer 91616 152509 98156 0 3 0x4000082 nanoslp syz-fuzzer 91616 376562 98156 0 3 0x4000082 thrsleep syz-fuzzer 91616 411132 98156 0 3 0x4000082 nanoslp syz-fuzzer 91616 314036 98156 0 3 0x4000082 kqread syz-fuzzer 91616 168929 98156 0 3 0x4000082 thrsleep syz-fuzzer 91616 391642 98156 0 3 0x4000082 thrsleep syz-fuzzer 91616 5535 98156 0 3 0x4000082 thrsleep syz-fuzzer 91616 286305 98156 0 3 0x4000082 thrsleep syz-fuzzer 98156 193737 2312 0 3 0x10008a sigsusp ksh 2312 56372 27104 0 3 0x9a kqread sshd 61457 206206 1 0 3 0x100083 ttyin getty 27104 240951 1 0 3 0x88 kqread sshd 35639 26156 15843 73 3 0x1100090 kqread syslogd 15843 21453 1 0 3 0x100082 netio syslogd 51560 90621 1 0 3 0x100080 kqread resolvd 25212 146809 33034 77 3 0x100092 kqread dhcpleased 89425 36152 33034 77 3 0x100092 kqread dhcpleased 33034 423302 1 0 3 0x80 kqread dhcpleased 15541 379238 0 0 3 0x14200 bored smr 32675 227515 0 0 2 0x14200 zerothread 12987 499431 0 0 3 0x14200 aiodoned aiodoned 44091 468111 0 0 3 0x14200 syncer update 68402 80790 0 0 3 0x14200 cleaner cleaner 47921 465396 0 0 7 0x14200 reaper 82249 511251 0 0 3 0x14200 pgdaemon pagedaemon 22156 422346 0 0 3 0x14200 bored viomb 7103 169398 0 0 3 0x40014200 acpi0 acpi0 44952 309085 0 0 3 0x40014200 idle1 53658 342894 0 0 3 0x14200 bored softnet 40080 452357 0 0 3 0x14200 bored systqmp 27775 313337 0 0 3 0x14200 bored systq 95811 409731 0 0 3 0x40014200 bored softclock 99695 202213 0 0 3 0x40014200 idle0 1 103656 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 37491 (syz-executor.3) thread 0xffff800021213cf0 (507987) exclusive rrwlock inode r = 0 (0xfffffd806e50c920) #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 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_makeinode+0xae sys/ufs/ufs/ufs_vnops.c:1830 #8 ufs_mknod+0x4e sys/ufs/ufs/ufs_vnops.c:172 #9 VOP_MKNOD+0xbf sys/kern/vfs_vops.c:121 #10 domknodat+0x326 sys/kern/vfs_syscalls.c:1630 #11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e50cc50) #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 domknodat+0x92 sys/kern/vfs_syscalls.c:1582 #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 Process 85746 (syz-executor.1) thread 0xffff8000ffff6fd0 (164439) shared rwlock netlock r = 0 (0xffffffff8290fe50) #0 witness_lock+0x44d #1 ifioctl_get+0x2d5 sys/net/if.c:2319 #2 soo_ioctl+0x26c #3 sys_ioctl+0x4a2 #4 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829de988) #0 witness_lock+0x44d #1 soo_ioctl+0x25a sys/kern/sys_socket.c:136 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10177 6408K 6419K 78643K 11294 0 pcb 13 12K 14K 78643K 17 0 rtable 254 7K 7K 78643K 854 0 ifaddr 81 17K 17K 78643K 146 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 74 0 ioctlops 0 0K 2K 78643K 136 0 iov 0 0K 20K 78643K 571 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1271 79K 79K 78643K 2140 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 52 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 927 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 121K 78643K 4294 0 sigio 0 0K 0K 78643K 61 0 proc 56 74K 111K 78643K 971 0 subproc 104 6K 6K 78643K 221 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 329 0 in_multi 99 6K 6K 78643K 254 0 ether_multi 1 0K 0K 78643K 12 0 mrt 1 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 79 360K 360K 78643K 79 0 exec 0 0K 2K 78643K 1636 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 376 88K 102K 78643K 56143 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 230 0 NDP 11 0K 2K 78643K 54 0 temp 125 4707K 4771K 78643K 14441 0 kqueue 15 24K 28K 78643K 1156 0 SYN cache 2 16K 16K 78643K 2 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 120 463 0 459 6 4 2 3 0 8 1 rtentry 112 220 0 102 4 0 4 4 0 8 0 unpcb 136 11518 0 11503 42 36 6 9 0 8 5 syncache 296 25 0 25 8 7 1 1 0 8 1 tcpqe 32 9 0 9 4 3 1 1 0 8 1 tcpcb 736 1545 0 1536 49 41 8 15 0 8 5 arp 120 37 0 18 1 0 1 1 0 8 0 ipq 40 7 0 6 4 3 1 1 0 8 0 ipqe 40 19 0 16 4 3 1 1 0 8 0 inpcb 304 4101 0 4086 57 47 10 15 0 8 8 ip6q 72 20 0 18 1 0 1 1 0 8 0 ip6af 40 38 0 36 1 0 1 1 0 8 0 nd6 48 60 0 29 1 0 1 1 0 8 0 kcovpl 48 17 0 9 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 928 0 426 34 2 32 34 0 8 0 art_table 32 929 0 426 5 0 5 5 0 8 0 art_node 16 219 0 111 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 0 1 0 1 1 0 8 0 semapl 112 921 0 911 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6887 0 5447 91 0 91 91 0 8 0 ffsino 272 6887 0 5447 97 0 97 97 0 8 0 nchpl 144 12667 0 11040 62 0 62 62 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 42589 0 42588 2 1 1 2 0 8 0 percpumem 16 49 0 9 1 0 1 1 0 8 0 scxspl 216 35163 0 35162 19 18 1 8 0 8 0 plimitpl 152 1121 0 1099 4 3 1 2 0 8 0 sigapl 424 4550 0 4500 7 1 6 7 0 8 0 futexpl 64 36007 0 36002 1 0 1 1 0 8 0 knotepl 120 381 0 0 11 1 10 11 0 8 0 kqueuepl 216 2402 0 2391 25 22 3 8 0 8 2 pipepl 336 784 0 756 14 11 3 8 0 8 0 fdescpl 496 4535 0 4501 7 2 5 6 0 8 0 filepl 152 35555 0 35311 64 49 15 20 0 8 5 lockfpl 104 375 0 373 1 0 1 1 0 8 0 lockfspl 48 154 0 152 1 0 1 1 0 8 0 sessionpl 144 32 0 16 1 0 1 1 0 8 0 pgrppl 48 228 0 212 1 0 1 1 0 8 0 ucredpl 96 4438 0 4420 1 0 1 1 0 8 0 zombiepl 144 4501 0 4500 1 0 1 1 0 8 0 processpl 1064 4550 0 4500 5 1 4 4 0 8 0 procpl 672 12658 0 12592 14 6 8 8 0 8 2 sosppl 168 76 0 73 6 5 1 1 0 8 0 sockpl 480 16261 0 16228 288 271 17 34 0 8 12 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 182 0 0 16 0 16 16 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 521 0 0 30 0 30 30 0 8 0 bufpl 288 9701 0 3366 453 0 453 453 0 8 0 anonpl 24 1255066 0 1240845 168 70 98 116 0 186 2 amapchunkpl 152 136396 0 135586 65 30 35 44 0 158 3 amappl16 200 12758 0 12380 65 43 22 33 0 8 0 amappl15 192 992 0 987 1 0 1 1 0 8 0 amappl14 184 1029 0 1021 1 0 1 1 0 8 0 amappl13 176 1704 0 1697 1 0 1 1 0 8 0 amappl12 168 475 0 469 1 0 1 1 0 8 0 amappl11 160 636 0 623 1 0 1 1 0 8 0 amappl10 152 56 0 49 1 0 1 1 0 8 0 amappl9 144 462 0 460 1 0 1 1 0 8 0 amappl8 136 1221 0 1127 4 0 4 4 0 8 0 amappl7 128 484 0 470 1 0 1 1 0 8 0 amappl6 120 235 0 214 2 1 1 2 0 8 0 amappl5 112 3262 0 3246 1 0 1 1 0 8 0 amappl4 104 2451 0 2417 2 0 2 2 0 8 0 amappl3 96 911 0 892 1 0 1 1 0 8 0 amappl2 88 2844 0 2790 3 1 2 3 0 8 0 amappl1 80 85076 0 84433 22 7 15 18 0 8 0 amappl 88 55396 0 55121 8 1 7 7 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 4535 0 4501 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4535 0 4501 1 0 1 1 0 8 0 vmmpekpl 168 39073 0 39024 3 0 3 3 0 8 0 vmmpepl 168 418914 0 416248 177 51 126 135 0 357 4 vmsppl 368 4534 0 4500 4 0 4 4 0 8 0 rwobjpl 56 108938 0 101513 111 2 109 109 0 8 0 pdppl 4096 9077 0 9000 195 114 81 93 0 8 4 pvpl 32 2141299 0 2121946 321 138 183 250 0 265 14 pmappl 248 4534 0 4500 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1004 0 171 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff829baff0) 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(ffffffff829de780) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829de780) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021135990,ffff800000077500) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff829de780) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829de780) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff800021135ae0,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x19 pool_put(ffffffff829d2e70,fffffd8069da0e08) at pool_put+0x22c sys/kern/subr_pool.c:814 pmap_do_remove(fffffd8063ae0d90,867eb22b000,867eb26b000,0) at pmap_do_remove+0x607 sys/arch/amd64/amd64/pmap.c:1879 uvm_unmap_kill_entry_withlock(fffffd806afd2740,fffffd8067bf5438,0) at uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:2139 uvm_map_teardown(fffffd806afd2740) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:177 [inline] uvm_map_teardown(fffffd806afd2740) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd806afd2740) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f9a40) at reaper+0x18b sys/kern/kern_exit.c:457 end trace frame: 0x0, count: -16 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:440 witness_checkorder(fffffd8063ac4030,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd8063ac4030,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd8063ac4020) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002e19e080,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff80002e19e080,ffff80002e19e0b8,ffff80002e19e0e0) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd8063ac4018,20000000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff80002e19e210,20000300) at kpageflttrap+0x209 kerntrap(ffff80002e19e210) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 ifioctl_get(c0106924,ffff80002e19e4c0) at ifioctl_get+0x2dd soo_ioctl(fffffd806c71ed28,c0106924,ffff80002e19e4c0,ffff8000ffff6fd0) at soo_ioctl+0x26c sys_ioctl(ffff8000ffff6fd0,ffff80002e19e5d8,ffff80002e19e630) at sys_ioctl+0x4a2 syscall(ffff80002e19e6a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e19e6a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ca2b7b70a0, count: -15