witness: lock order reversal: 1st 0xfffffd8067375d60 inode (&ip->i_lock) 2nd 0xffffffff8277e670 netlock (netlock) lock order "netlock"(rwlock) -> "&ip->i_lock"(rrwlock) first seen at: #0 witness_checkorder+0x65e witness_lock_order_add sys/kern/subr_witness.c:2463 [inline] #0 witness_checkorder+0x65e sys/kern/subr_witness.c:880 #1 rw_enter+0xd4 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 #4 vn_lock+0x6c sys/kern/vfs_vnops.c:575 #5 vget+0x1c6 sys/kern/vfs_subr.c:671 #6 ktrwriteraw+0x138 sys/kern/kern_ktrace.c:659 #7 ktrstruct+0x169 ktrwrite2 sys/kern/kern_ktrace.c:627 [inline] #7 ktrstruct+0x169 sys/kern/kern_ktrace.c:311 #8 sys_connect+0x246 #9 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #10 Xsyscall+0x128 lock order "&ip->i_lock"(rrwlock) -> "netlock"(rwlock) first seen at: #0 witness_checkorder+0x65e witness_lock_order_add sys/kern/subr_witness.c:2463 [inline] #0 witness_checkorder+0x65e sys/kern/subr_witness.c:880 #1 rw_enter_write+0x5b sys/kern/kern_rwlock.c:127 #2 uvn_get+0xeb uvm_vnode_lock sys/uvm/uvm_vnode.c:1501 [inline] #2 uvn_get+0xeb sys/uvm/uvm_vnode.c:993 #3 uvm_fault+0xa41 sys/uvm/uvm_fault.c:1073 #4 kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 #5 kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 #6 alltraps_kern_meltdown+0x7b #7 copyin+0x53 #8 sys_connect+0x9b sys/kern/uipc_syscalls.c:362 #9 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #10 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:398 witness_checkorder(ffffffff8277e670,9,0) at witness_checkorder+0xf5a witness_debugger sys/kern/subr_witness.c:2490 [inline] witness_checkorder(ffffffff8277e670,9,0) at witness_checkorder+0xf5a sys/kern/subr_witness.c:1087 rw_enter_write(ffffffff8277e660) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:127 uvn_get(fffffd8062e94b50,0,ffff8000242ded58,ffff8000242decf4,0,1) at uvn_get+0xeb uvm_vnode_lock sys/uvm/uvm_vnode.c:1501 [inline] uvn_get(fffffd8062e94b50,0,ffff8000242ded58,ffff8000242decf4,0,1) at uvn_get+0xeb sys/uvm/uvm_vnode.c:993 uvm_fault(fffffd807eff92e0,20000000,0,1) at uvm_fault+0xa41 sys/uvm/uvm_fault.c:1073 kpageflttrap(ffff8000242dee80,20000000) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000242dee80) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_connect(ffff80002123c538,ffff8000242df048,ffff8000242df090) at sys_connect+0x9b sys/kern/uipc_syscalls.c:362 syscall(ffff8000242df110) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000242df110) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x33d92754c30, count: -12 ddb{1}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be68 rbp 0xffff8000242de9c0 rbx 0x3 rdx 0xffff800000ac1bc0 rcx 0x3 rax 0x3ffff acpi_pdirpa+0x2be67 r8 0xffffffff81e34c43 witness_checkorder+0xf33 r9 0x5 r10 0x9f84df822f8d16db r11 0x5a4763027229c8cf r12 0xffffffff828473e0 w_lodata+0x4a820 r13 0 r14 0xffffffff82846150 w_lodata+0x49590 r15 0xfffffd8002c975c0 rip 0xffffffff82243a18 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000242de9b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=406857 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff80002123c2a8,0xffffffff828e9418 process=0xffff800021235090 user=0xffff8000242da000, vmspace=0xfffffd807eff92e0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 66088 495236 37690 0 7 0 syz-executor.1 *66088 406857 37690 0 7 0x4000000 syz-executor.1 15090 163539 0 0 3 0x14200 bored sosplice 37690 458030 59261 0 3 0x82 nanosleep syz-executor.1 88360 40849 59261 0 3 0x2 biowait syz-executor.0 59261 21747 67838 0 3 0x82 thrsleep syz-fuzzer 59261 384327 67838 0 3 0x4000082 nanosleep syz-fuzzer 59261 303693 67838 0 3 0x4000082 thrsleep syz-fuzzer 59261 143561 67838 0 3 0x4000082 thrsleep syz-fuzzer 59261 479891 67838 0 3 0x4000082 thrsleep syz-fuzzer 59261 32041 67838 0 3 0x4000082 thrsleep syz-fuzzer 59261 234089 67838 0 3 0x4000082 thrsleep syz-fuzzer 59261 365788 67838 0 3 0x4000082 kqread syz-fuzzer 67838 227 24752 0 3 0x10008a pause ksh 24752 420310 19944 0 3 0x92 select sshd 41202 20651 1 0 3 0x100083 ttyin getty 19944 519086 1 0 3 0x80 select sshd 19504 35034 22833 74 3 0x100092 bpf pflogd 22833 265768 1 0 3 0x80 netio pflogd 90086 374455 20419 73 3 0x100090 kqread syslogd 20419 22245 1 0 3 0x100082 netio syslogd 67417 178364 1 77 3 0x100090 poll dhclient 22041 328612 1 0 3 0x80 poll dhclient 55998 329793 0 0 3 0x14200 bored smr 30865 95020 0 0 3 0x14200 pgzero zerothread 54149 291276 0 0 3 0x14200 aiodoned aiodoned 22682 295594 0 0 3 0x14200 syncer update 29314 399744 0 0 3 0x14200 cleaner cleaner 5127 347952 0 0 3 0x14200 reaper reaper 18443 153480 0 0 3 0x14200 pgdaemon pagedaemon 66082 77975 0 0 3 0x14200 bored crynlk 78767 190980 0 0 3 0x14200 bored crypto 5198 83118 0 0 3 0x14200 bored viomb 61928 298871 0 0 3 0x40014200 acpi0 acpi0 63345 224382 0 0 3 0x40014200 idle1 36014 136503 0 0 3 0x14200 bored softnet 81183 387573 0 0 3 0x14200 bored systqmp 60795 195690 0 0 3 0x14200 bored systq 84403 439370 0 0 3 0x40014200 bored softclock 40570 388789 0 0 3 0x40014200 idle0 1 261130 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 66088 (syz-executor.1) thread 0xffff80002123c538 (406857) exclusive rrwlock inode r = 0 (0xfffffd8067375d60) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 #4 vn_lock+0x6c sys/kern/vfs_vnops.c:575 #5 uvn_get+0xd7 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline] #5 uvn_get+0xd7 sys/uvm/uvm_vnode.c:993 #6 uvm_fault+0xa41 sys/uvm/uvm_fault.c:1073 #7 kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 #8 kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 #9 alltraps_kern_meltdown+0x7b #10 copyin+0x53 #11 sys_connect+0x9b sys/kern/uipc_syscalls.c:362 #12 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #12 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #13 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828cea78) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 syscall+0x3fd mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3fd sys/arch/amd64/amd64/trap.c:590 #2 Xsyscall+0x128 Process 88360 (syz-executor.0) thread 0xffff80002123cf78 (40849) exclusive rrwlock inode r = 0 (0xfffffd80673751b0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x135 sys/ufs/ffs/ffs_vfsops.c:1350 #5 ffs_inode_alloc+0x1e1 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:459 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3064 #9 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8067375e70) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 #4 vn_lock+0x6c sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x5f7 sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3049 #8 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9512 6555K 6812K 78643K 11736 0 pcb 13 8K 8K 78643K 77 0 rtable 99 5K 6K 78643K 297 0 ifaddr 55 12K 12K 78643K 71 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 49 0 ioctlops 0 0K 4K 78643K 1522 0 iov 0 0K 12K 78643K 34 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1532 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 10 1K 1K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1825 197K 290K 78643K 13109 0 file desc 5 13K 25K 78643K 1365 0 sigio 0 0K 0K 78643K 8 0 proc 61 63K 95K 78643K 468 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 54 0 in_multi 33 2K 2K 78643K 68 0 ether_multi 1 0K 0K 78643K 7 0 mrt 0 0K 0K 78643K 4 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 400 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 167 30K 34K 78643K 4075 0 UVM aobj 16 2K 2K 78643K 19 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 54 0 NDP 8 0K 0K 78643K 15 0 temp 116 3968K 4032K 78643K 6678 0 kqueue 3 4K 12K 78643K 30 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 arp 64 8 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 120 42 0 40 1 0 1 1 0 8 0 rtentry 112 54 0 19 2 0 2 2 0 8 0 unpcb 120 233 0 223 1 0 1 1 0 8 0 syncache 296 14 0 14 5 4 1 1 0 8 1 tcpqe 32 584 0 584 4 3 1 1 0 8 1 tcpcb 736 195 0 182 5 2 3 3 0 8 1 inpcb 296 503 0 494 4 2 2 2 0 8 1 rttmr 72 2 0 2 1 1 0 1 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 2 0 0 1 0 1 1 0 8 0 ppxss 1128 2 0 2 2 2 0 1 0 8 0 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 4 0 4 2 1 1 1 0 8 1 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 6 0 2 1 0 1 1 0 8 0 pfstitem 24 33 0 16 1 0 1 1 0 8 0 pfstkey 112 33 0 16 1 0 1 1 0 8 0 pfstate 328 33 0 16 2 0 2 2 0 8 0 pfrule 1360 48 0 33 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 227 0 78 13 1 12 13 0 8 0 art_table 32 228 0 78 2 0 2 2 0 8 0 art_node 16 53 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 41 0 9 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 16 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2945 0 1546 88 0 88 88 0 8 0 ffsino 272 2945 0 1546 95 1 94 94 0 8 0 nchpl 144 4664 0 3060 61 1 60 60 0 8 0 uvmvnodes 72 3240 0 0 59 0 59 59 0 8 0 vnodes 208 3240 0 0 171 0 171 171 0 8 0 namei 1024 11495 0 11494 5 4 1 1 0 8 0 percpumem 16 35 0 3 1 0 1 1 0 8 0 pfiaddrpl 120 10 0 0 1 0 1 1 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 14202 0 14201 11 10 1 8 0 8 0 plimitpl 152 60 0 52 1 0 1 1 0 8 0 sigapl 424 1582 0 1549 4 0 4 4 0 8 0 futexpl 56 9448 0 9448 3 2 1 1 0 8 1 knotepl 112 94 0 74 1 0 1 1 0 8 0 kqueuepl 152 1142 0 1127 1 0 1 1 0 8 0 pipepl 304 113 0 102 3 2 1 2 0 8 0 fdescpl 496 1565 0 1549 3 0 3 3 0 8 0 filepl 152 5439 0 5335 6 1 5 5 0 8 0 lockfpl 104 157 0 156 1 0 1 1 0 8 0 lockfspl 48 47 0 46 1 0 1 1 0 8 0 sessionpl 144 18 0 7 1 0 1 1 0 8 0 pgrppl 48 23 0 12 1 0 1 1 0 8 0 ucredpl 96 468 0 459 1 0 1 1 0 8 0 zombiepl 144 1549 0 1549 3 2 1 1 0 8 1 processpl 1056 1582 0 1549 3 0 3 3 0 8 0 procpl 656 3421 0 3380 6 1 5 5 0 8 1 sosppl 168 15 0 15 3 2 1 1 0 8 1 sockpl 400 779 0 758 5 1 4 4 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 259 0 0 23 1 22 23 0 8 0 mtagpl 96 72 0 0 2 0 2 2 0 8 0 mbufpl 256 505 0 0 29 1 28 28 0 8 0 bufpl 280 5244 0 183 362 0 362 362 0 8 0 anonpl 16 145791 0 122792 108 14 94 99 0 124 1 amapchunkpl 152 6988 0 6501 25 3 22 24 0 158 2 amappl16 192 5486 0 4533 59 10 49 53 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 691 0 686 1 0 1 1 0 8 0 amappl13 168 34 0 33 2 1 1 1 0 8 0 amappl12 160 6 0 2 1 0 1 1 0 8 0 amappl11 152 52 0 37 1 0 1 1 0 8 0 amappl10 144 674 0 667 1 0 1 1 0 8 0 amappl9 136 16 0 15 1 0 1 1 0 8 0 amappl8 128 158 0 115 2 0 2 2 0 8 0 amappl7 120 245 0 238 1 0 1 1 0 8 0 amappl6 112 738 0 725 1 0 1 1 0 8 0 amappl5 104 2413 0 2394 1 0 1 1 0 8 0 amappl4 96 291 0 263 1 0 1 1 0 8 0 amappl3 88 139 0 132 1 0 1 1 0 8 0 amappl2 80 10999 0 10933 3 0 3 3 0 8 0 amappl1 72 56057 0 55572 25 15 10 19 0 8 0 amappl 80 3745 0 3643 3 0 3 3 0 84 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 18 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1565 0 1549 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1565 0 1549 1 0 1 1 0 8 0 vmmpekpl 168 13494 0 13465 2 0 2 2 0 8 0 vmmpepl 168 207537 0 205322 157 53 104 125 0 357 2 vmsppl 368 1564 0 1549 2 0 2 2 0 8 0 pdppl 4096 3137 0 3098 70 29 41 45 0 8 2 pvpl 32 593391 0 567209 264 43 221 228 0 265 8 pmappl 232 1564 0 1549 2 1 1 2 0 8 0 extentpl 40 57 0 39 1 0 1 1 0 8 0 phpool 112 349 0 43 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8272eff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x3e kd_curproc sys/dev/kcov.c:571 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x3e sys/dev/kcov.c:143 __mp_lock(ffffffff828ce870) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828ce870) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff800021218130,ffff80000065a300) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge4_untramp() at Xintr_ioapic_edge4_untramp+0x19f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x37 kd_curproc sys/dev/kcov.c:570 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x37 sys/dev/kcov.c:143 __mp_lock(ffffffff828ce870) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828ce870) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff800021218290,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x19f end of kernel end trace frame: 0x7f7ffffc22c0, count: -11 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:398 witness_checkorder(ffffffff8277e670,9,0) at witness_checkorder+0xf5a witness_debugger sys/kern/subr_witness.c:2490 [inline] witness_checkorder(ffffffff8277e670,9,0) at witness_checkorder+0xf5a sys/kern/subr_witness.c:1087 rw_enter_write(ffffffff8277e660) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:127 uvn_get(fffffd8062e94b50,0,ffff8000242ded58,ffff8000242decf4,0,1) at uvn_get+0xeb uvm_vnode_lock sys/uvm/uvm_vnode.c:1501 [inline] uvn_get(fffffd8062e94b50,0,ffff8000242ded58,ffff8000242decf4,0,1) at uvn_get+0xeb sys/uvm/uvm_vnode.c:993 uvm_fault(fffffd807eff92e0,20000000,0,1) at uvm_fault+0xa41 sys/uvm/uvm_fault.c:1073 kpageflttrap(ffff8000242dee80,20000000) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000242dee80) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_connect(ffff80002123c538,ffff8000242df048,ffff8000242df090) at sys_connect+0x9b sys/kern/uipc_syscalls.c:362 syscall(ffff8000242df110) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000242df110) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x33d92754c30, count: -12