witness: lock order reversal: 1st 0xffffffff8290fe50 netlock (netlock) 2nd 0xfffffd806904de90 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 fifo_ioctl+0x104 sys/miscfs/fifofs/fifo_vnops.c:307 #11 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #12 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #13 sys_ioctl+0x4a2 #14 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #15 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(fffffd806904de90,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd806904de90,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd806904de80) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002e39cc10,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff80002e39cc10,ffff80002e39cc48,ffff80002e39cc70) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd806904de78,2000c000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff80002e39cda0,2000cf00) at kpageflttrap+0x209 kerntrap(ffff80002e39cda0) 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,ffff80002e39d2f0) at ifioctl_get+0x2dd soo_ioctl(ffff80002e39d050,c0106924,ffff80002e39d2f0,ffff800021248a88) at soo_ioctl+0x26c fifo_ioctl(ffff80002e39d138) at fifo_ioctl+0x104 sys/miscfs/fifofs/fifo_vnops.c:307 VOP_IOCTL(fffffd806e54d408,c0106924,ffff80002e39d2f0,3,fffffd807f7d8120,ffff800021248a88) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069be41e0,c0106924,ffff80002e39d2f0,ffff800021248a88) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800021248a88,ffff80002e39d408,ffff80002e39d460) at sys_ioctl+0x4a2 syscall(ffff80002e39d4d0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e39d4d0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe18437ce020, count: -18 ddb{0}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be68 rbp 0xffff80002e39c900 rbx 0x3 rdx 0xffff800000bc8bc0 rcx 0 rax 0x3ffff acpi_pdirpa+0x2be67 r8 0xffff80002e39c870 r9 0x8080808080808080 r10 0x58ccd580fb3003c0 r11 0x19f3df3dff3ca27c r12 0xffffffff82ab0010 w_lodata+0x526a0 r13 0 r14 0xffffffff82aa1ff0 w_lodata+0x44680 r15 0xfffffd8002f62d80 rip 0xffffffff8138d658 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e39c8f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.2) pid=117984 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000212497a8,0xffffffff82b3d400 process=0xffff800021233620 user=0xffff80002e398000, vmspace=0xfffffd806904de78 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 68180 136714 40338 32767 2 0x10 syz-executor.0 68180 425927 40338 32767 3 0x4000090 fsleep syz-executor.0 68180 416289 40338 32767 3 0x4000090 fsleep syz-executor.0 68180 65181 40338 32767 3 0x4000090 fsleep syz-executor.0 50569 370313 81483 32767 2 0x10 syz-executor.3 50569 114294 81483 32767 3 0x4000090 fsleep syz-executor.3 83902 391718 58858 32767 2 0x10 syz-executor.2 *83902 117984 58858 32767 7 0x4000010 syz-executor.2 2975 379346 30899 32767 2 0x10 syz-executor.1 2975 150045 30899 32767 2 0x4000010 syz-executor.1 2975 448520 30899 32767 3 0x4000090 fsleep syz-executor.1 73968 418070 89538 32767 3 0x90 nanoslp syz-executor.7 89538 235955 50346 0 3 0x82 wait syz-executor.7 93361 350322 4791 32767 3 0x10 biowait syz-executor.5 4791 207881 50346 0 3 0x82 wait syz-executor.5 40338 6628 5564 32767 3 0x90 nanoslp syz-executor.0 5564 32990 50346 0 3 0x82 wait syz-executor.0 58858 116658 46818 32767 3 0x90 nanoslp syz-executor.2 46818 37127 50346 0 3 0x82 wait syz-executor.2 93629 249468 0 0 3 0x14200 bored sosplice 14022 483571 86215 32767 3 0x10 biowait syz-executor.4 68225 505741 95270 32767 3 0x90 nanoslp syz-executor.6 86215 31831 50346 0 3 0x82 wait syz-executor.4 95270 228565 50346 0 3 0x82 wait syz-executor.6 81483 452602 76862 32767 3 0x90 nanoslp syz-executor.3 76862 446862 50346 0 3 0x82 wait syz-executor.3 30899 372010 34781 32767 3 0x90 nanoslp syz-executor.1 34781 20423 50346 0 3 0x82 wait syz-executor.1 50346 201594 65493 0 3 0x82 nanoslp syz-fuzzer 50346 125652 65493 0 3 0x4000082 nanoslp syz-fuzzer 50346 500633 65493 0 3 0x4000082 thrsleep syz-fuzzer 50346 123270 65493 0 3 0x4000082 thrsleep syz-fuzzer 50346 295265 65493 0 3 0x4000082 kqread syz-fuzzer 50346 241569 65493 0 3 0x4000082 thrsleep syz-fuzzer 50346 473237 65493 0 3 0x4000082 thrsleep syz-fuzzer 50346 90757 65493 0 3 0x4000082 thrsleep syz-fuzzer 50346 166840 65493 0 3 0x4000082 thrsleep syz-fuzzer 50346 229617 65493 0 3 0x4000082 thrsleep syz-fuzzer 65493 331747 91484 0 3 0x10008a sigsusp ksh 91484 467155 54695 0 3 0x9a kqread sshd 36999 132456 1 0 3 0x100083 ttyin getty 54695 513510 1 0 3 0x88 kqread sshd 77502 63526 40794 73 3 0x1100090 kqread syslogd 40794 58533 1 0 3 0x100082 netio syslogd 704 181419 1 0 3 0x100080 kqread resolvd 43996 254279 51116 77 3 0x100092 kqread dhcpleased 11949 42294 51116 77 3 0x100092 kqread dhcpleased 51116 239698 1 0 3 0x80 kqread dhcpleased 77297 16484 0 0 3 0x14200 bored smr 97196 170836 0 0 2 0x14200 zerothread 28624 189819 0 0 3 0x14200 aiodoned aiodoned 18683 115277 0 0 3 0x14200 syncer update 87109 491524 0 0 3 0x14200 cleaner cleaner 53588 208906 0 0 7 0x14200 reaper 61961 473894 0 0 3 0x14200 pgdaemon pagedaemon 41738 459017 0 0 3 0x14200 bored viomb 6412 19740 0 0 3 0x40014200 acpi0 acpi0 20164 499694 0 0 3 0x40014200 idle1 12141 97116 0 0 3 0x14200 bored softnet 63199 142554 0 0 3 0x14200 bored systqmp 90074 190938 0 0 3 0x14200 bored systq 90422 415867 0 0 3 0x40014200 bored softclock 62383 377439 0 0 3 0x40014200 idle0 1 396520 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 83902 (syz-executor.2) thread 0xffff800021248a88 (117984) shared rwlock netlock r = 0 (0xffffffff8290fe50) #0 witness_lock+0x44d #1 ifioctl_get+0x2d5 sys/net/if.c:2319 #2 soo_ioctl+0x26c #3 fifo_ioctl+0x104 sys/miscfs/fifofs/fifo_vnops.c:307 #4 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x4a2 #7 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #7 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829de988) #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 93361 (syz-executor.5) thread 0xffff800022c6aa90 (350322) exclusive rrwlock inode r = 0 (0xfffffd8068c7b2b8) #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_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3101 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80671f73d8) #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 domkdirat+0x75 sys/kern/vfs_syscalls.c:3086 #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 14022 (syz-executor.4) thread 0xffff800021249ce8 (483571) exclusive rrwlock inode r = 0 (0xfffffd8068c7b4d8) #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 (0xfffffd806804d1b0) #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 10205 6411K 6419K 78643K 11318 0 pcb 13 20K 24K 78643K 21 0 rtable 260 7K 7K 78643K 933 0 ifaddr 81 17K 17K 78643K 132 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 70 0 ioctlops 0 0K 2K 78643K 103 0 iov 0 0K 20K 78643K 815 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1272 79K 79K 78643K 2827 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 97 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1975 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 129K 78643K 8958 0 sigio 0 0K 0K 78643K 780 0 proc 56 74K 111K 78643K 1045 0 subproc 104 6K 6K 78643K 195 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2229 0 in_multi 99 6K 7K 78643K 1395 0 ether_multi 1 0K 0K 78643K 18 0 mrt 2 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 1501 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 413 91K 107K 78643K 117007 0 UVM aobj 131 4K 4K 78643K 145 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 145 0 NDP 11 0K 2K 78643K 48 0 temp 125 4707K 4771K 78643K 24345 0 kqueue 12 18K 28K 78643K 1386 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 120 729 0 726 11 10 1 4 0 8 0 rtentry 112 211 0 90 4 0 4 4 0 8 0 unpcb 136 21561 0 21545 97 96 1 10 0 8 0 syncache 296 59 0 59 15 15 0 1 0 8 0 tcpqe 32 12 0 12 7 7 0 1 0 8 0 tcpcb 736 4503 0 4497 129 128 1 20 0 8 0 arp 120 34 0 16 1 0 1 1 0 8 0 ipq 40 12 0 11 6 5 1 1 0 8 0 ipqe 40 281 0 280 6 5 1 1 0 8 0 inpcb 304 8273 0 8264 107 106 1 17 0 8 0 rttmr 72 3 0 2 1 0 1 1 0 8 0 ip6q 72 8 0 4 2 1 1 1 0 8 0 ip6af 40 10 0 6 2 1 1 1 0 8 0 nd6 48 65 0 31 1 0 1 1 0 8 0 kcovpl 48 15 0 7 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 886 0 375 34 2 32 32 0 8 0 art_table 32 887 0 375 6 1 5 5 0 8 0 art_node 16 210 0 99 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 12 1 0 1 1 0 8 0 semapl 112 1971 0 1961 1 0 1 1 0 8 0 shmpl 112 142 0 14 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 13162 0 11724 91 0 91 91 0 8 0 ffsino 272 13162 0 11724 97 0 97 97 0 8 0 nchpl 144 24706 0 23081 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 77915 0 77914 3 2 1 2 0 8 0 percpumem 16 47 0 7 1 0 1 1 0 8 0 scxspl 216 67947 0 67945 25 24 1 5 0 8 0 plimitpl 152 1044 0 1022 3 2 1 2 0 8 0 sigapl 424 9218 0 9168 7 0 7 7 0 8 0 futexpl 64 76124 0 76119 2 1 1 1 0 8 0 knotepl 120 656 0 0 12 2 10 11 0 8 0 kqueuepl 216 4826 0 4817 71 70 1 8 0 8 0 pipepl 336 2093 0 2064 62 59 3 10 0 8 0 fdescpl 496 9203 0 9170 7 1 6 6 0 8 0 filepl 152 73973 0 73733 124 114 10 20 0 8 0 lockfpl 104 889 0 887 2 1 1 2 0 8 0 lockfspl 48 295 0 293 1 0 1 1 0 8 0 sessionpl 144 30 0 14 1 0 1 1 0 8 0 pgrppl 48 68 0 52 1 0 1 1 0 8 0 ucredpl 96 8686 0 8668 1 0 1 1 0 8 0 zombiepl 144 9170 0 9168 2 1 1 1 0 8 0 processpl 1064 9218 0 9168 5 1 4 4 0 8 0 procpl 672 26958 0 26891 14 8 6 8 0 8 0 sosppl 168 88 0 88 8 8 0 1 0 8 0 sockpl 480 30741 0 30713 702 697 5 37 0 8 0 mcl64k 65536 34 0 0 4 1 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 22 0 0 2 0 2 2 0 8 0 mcl9k 9216 33 0 0 3 1 2 2 0 8 0 mcl8k 8192 25 0 0 3 0 3 3 0 8 0 mcl4k 4096 42 0 0 3 1 2 3 0 8 0 mcl2k2 2112 15 0 0 1 0 1 1 0 8 0 mcl2k 2048 229 0 0 17 0 17 17 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 6659 0 0 414 0 414 414 0 8 0 bufpl 288 15714 0 9379 453 0 453 453 0 8 0 anonpl 24 2627159 0 2612879 239 134 105 116 0 186 6 amapchunkpl 152 288045 0 287258 137 104 33 47 0 158 0 amappl16 200 24945 0 24566 134 105 29 34 0 8 8 amappl15 192 1165 0 1159 1 0 1 1 0 8 0 amappl14 184 2282 0 2272 1 0 1 1 0 8 0 amappl13 176 2155 0 2151 1 0 1 1 0 8 0 amappl12 168 2035 0 2025 1 0 1 1 0 8 0 amappl11 160 50 0 39 1 0 1 1 0 8 0 amappl10 152 639 0 636 1 0 1 1 0 8 0 amappl9 144 1865 0 1857 1 0 1 1 0 8 0 amappl8 136 1595 0 1457 6 1 5 5 0 8 0 amappl7 128 614 0 600 1 0 1 1 0 8 0 amappl6 120 1617 0 1589 2 1 1 2 0 8 0 amappl5 112 6892 0 6875 1 0 1 1 0 8 0 amappl4 104 2290 0 2259 2 1 1 2 0 8 0 amappl3 96 2753 0 2733 1 0 1 1 0 8 0 amappl2 88 5110 0 5054 3 1 2 3 0 8 0 amappl1 80 169032 0 168403 18 3 15 18 0 8 0 amappl 88 116110 0 115845 8 1 7 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 72 144 0 14 3 0 3 3 0 8 0 uaddrrnd 24 9203 0 9169 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9203 0 9169 1 0 1 1 0 8 0 vmmpekpl 168 77120 0 77072 3 0 3 3 0 8 0 vmmpepl 168 841913 0 839226 228 102 126 142 0 357 0 vmsppl 368 9202 0 9168 5 1 4 5 0 8 0 rwobjpl 56 210288 0 202823 119 11 108 110 0 8 0 pdppl 4096 18413 0 18336 265 184 81 97 0 8 4 pvpl 32 4320679 0 4301124 396 217 179 260 0 265 6 pmappl 248 9202 0 9168 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1590 0 380 36 0 36 36 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(fffffd806904de90,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd806904de90,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd806904de80) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002e39cc10,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff80002e39cc10,ffff80002e39cc48,ffff80002e39cc70) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd806904de78,2000c000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff80002e39cda0,2000cf00) at kpageflttrap+0x209 kerntrap(ffff80002e39cda0) 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,ffff80002e39d2f0) at ifioctl_get+0x2dd soo_ioctl(ffff80002e39d050,c0106924,ffff80002e39d2f0,ffff800021248a88) at soo_ioctl+0x26c fifo_ioctl(ffff80002e39d138) at fifo_ioctl+0x104 sys/miscfs/fifofs/fifo_vnops.c:307 VOP_IOCTL(fffffd806e54d408,c0106924,ffff80002e39d2f0,3,fffffd807f7d8120,ffff800021248a88) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069be41e0,c0106924,ffff80002e39d2f0,ffff800021248a88) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800021248a88,ffff80002e39d408,ffff80002e39d460) at sys_ioctl+0x4a2 syscall(ffff80002e39d4d0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e39d4d0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe18437ce020, count: -18 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(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 uvm_unmap_detach(ffff8000211350e0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd806c754180) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd806c754180) 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: -8