witness: lock order reversal: 1st 0xfffffd806c72e490 vmmaplk (&map->lock) 2nd 0xfffffd806ddb6d60 inode (&ip->i_lock) lock order [1] vmmaplk (&map->lock) -> [2] inode (&ip->i_lock) #0 rw_enter+0x122 #1 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #2 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #3 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #4 vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 #5 vndstrategy+0x4ff sys/dev/vnd.c:342 #6 physio+0x2f6 sys/kern/kern_physio.c:162 #7 spec_read+0x155 sys/kern/spec_vnops.c:215 #8 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #9 vn_read+0x17b sys/kern/vfs_vnops.c:369 #10 dofilereadv+0x230 sys/kern/sys_generic.c:252 #11 sys_read+0xa2 sys/kern/sys_generic.c:172 #12 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #12 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 lock order [2] inode (&ip->i_lock) -> [1] vmmaplk (&map->lock) #0 rw_enter_read+0xab sys/kern/kern_rwlock.c:112 #1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1819 #2 uvm_fault_check+0x49 sys/uvm/uvm_fault.c:672 #3 uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 #4 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #5 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #6 alltraps_kern_meltdown+0x7b #7 copyout+0x57 #8 ffs_read+0x422 sys/ufs/ffs/ffs_vnops.c:254 #9 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #10 vn_rdwr+0x15b #11 vmcmd_map_readvn+0x142 sys/kern/exec_subr.c:249 #12 exec_process_vmcmds+0xfb sys/kern/exec_subr.c:139 #13 sys_execve+0xbe4 sys/kern/kern_exec.c:468 #14 start_init+0x3c6 sys/kern/init_main.c:714 #15 proc_trampoline+0x10 Stopped at db_enter+0x25: 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+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806ddb6d60,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806ddb6d50,1) at rw_enter+0x122 rrw_enter(fffffd806ddb6d50,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805e7fbbd8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805e7fbbd8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd805e7fbbd8,ffff800011a26340,df,0,1,43423beb989ddd38,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd80658fba18) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff8131d350,2902,8000,ffffffff818b3880,ffff80002a0dca08) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80002a0dc870) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e677eb8,ffff80002a0dca08,0,fffffd807f7d34e0) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806ceb43a8,ffff80002a0dca08,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000371ef1f8,5,ffff80002a0dca08,0,ffff80002a0dcac0) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_read(ffff8000371ef1f8,ffff80002a0dcb70,ffff80002a0dcac0) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80002a0dcb70) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a0dcb70) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaa2d18f06a0, count: -16 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff80002a0dc330 rbx 0xfffffd80042c83d8 rdx 0xffff8000012b3540 rcx 0xffff8000371ef1f8 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff80002a0dc210 r9 0x8080808080808080 r10 0xffc5a6546e36a2ac r11 0xcca5a2a1938601f3 r12 0 r13 0xfffffd8003adfe00 r14 0x3 r15 0xffffffff rip 0xffffffff817a0ea5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a0dc320 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=346580 pid=13705 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371ee2c8,0xffff8000371ee560 process=0xffff800037288490 user=0xffff80002a0d7000, vmspace=0xfffffd806c72e398 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97315 285191 60274 0 2 0 syz-executor 13705 469908 38343 0 3 0 vmmaplk syz-executor *13705 346580 38343 0 7 0x4000000 syz-executor 22044 483538 28734 0 3 0x80 nanoslp syz-executor 22044 304105 28734 0 3 0x4000080 kqsel syz-executor 22044 158308 28734 0 3 0x4000080 fsleep syz-executor 29462 494988 0 0 3 0x14200 acct acct 19651 72089 96012 0 3 0x80 nanoslp syz-executor 19651 310767 96012 0 3 0x4000080 kqsel syz-executor 19651 364000 96012 0 3 0x4000080 fsleep syz-executor 5295 267927 23657 0 3 0x80 nanoslp syz-executor 5295 513996 23657 0 3 0x4000080 kqsel syz-executor 5295 324197 23657 0 3 0x4000080 fsleep syz-executor 55675 421411 66729 0 3 0x80 nanoslp syz-executor 55675 8839 66729 0 3 0x4000080 ttyin syz-executor 66729 414748 15073 0 3 0x82 nanoslp syz-executor 39647 219952 1 0 3 0x80 nanoslp init 34034 285124 0 0 3 0x14280 nfsidl nfsio 24800 359547 0 0 3 0x14280 nfsidl nfsio 64271 350973 0 0 3 0x14280 nfsidl nfsio 61822 281889 0 0 3 0x14280 nfsidl nfsio 37955 182493 0 0 3 0x14280 nfsidl nfsio 36775 83026 0 0 3 0x14280 nfsidl nfsio 17448 435321 0 0 3 0x14280 nfsidl nfsio 16405 109165 0 0 3 0x14280 nfsidl nfsio 71099 158706 0 0 3 0x14280 nfsidl nfsio 62730 364842 0 0 3 0x14280 nfsidl nfsio 84176 88209 0 0 3 0x14280 nfsidl nfsio 3442 297235 0 0 3 0x14280 nfsidl nfsio 26588 431169 0 0 3 0x14280 nfsidl nfsio 95625 344379 0 0 3 0x14280 nfsidl nfsio 78801 58876 0 0 3 0x14280 nfsidl nfsio 19232 5848 0 0 3 0x14280 nfsidl nfsio 86043 246932 0 0 3 0x14280 nfsidl nfsio 22523 16505 0 0 3 0x14280 nfsidl nfsio 36253 270706 0 0 3 0x14280 nfsidl nfsio 19510 139325 0 0 3 0x14280 nfsidl nfsio 23951 470350 0 0 3 0x14200 bored sosplice 38343 68128 15073 0 3 0x82 nanoslp syz-executor 46922 50119 15073 0 2 0x2 syz-executor 57346 305786 15073 0 3 0x82 nanoslp syz-executor 28734 156419 15073 0 7 0x2 syz-executor 23657 98471 15073 0 3 0x82 nanoslp syz-executor 96012 101995 15073 0 3 0x82 nanoslp syz-executor 60274 488119 15073 0 3 0x82 nanoslp syz-executor 15073 314723 23279 0 3 0x82 kqread syz-executor 23279 203452 70435 0 3 0x10008a sigsusp ksh 70435 230005 72791 0 3 0x98 kqread sshd-session 72791 12719 1909 0 3 0x92 kqread sshd-session 1909 267068 1 0 3 0x88 kqread sshd 52825 494000 91209 74 3 0x1100092 bpf pflogd 91209 238458 1 0 3 0x80 sbwait pflogd 55513 154334 37154 73 3 0x1100090 kqread syslogd 37154 396284 1 0 3 0x100082 sbwait syslogd 96139 363425 1 0 3 0x100080 kqread resolvd 68260 43070 59298 77 3 0x100092 kqread dhcpleased 59786 256312 59298 77 3 0x100092 kqread dhcpleased 59298 481095 1 0 3 0x80 kqread dhcpleased 18339 399669 0 0 3 0x14200 bored smr 28204 217210 0 0 3 0x14200 pgzero zerothread 25151 7308 0 0 3 0x14200 aiodoned aiodoned 35319 312870 0 0 3 0x14200 syncer update 8842 107111 0 0 3 0x14200 cleaner cleaner 53957 344157 0 0 3 0x14200 reaper reaper 50621 348795 0 0 3 0x14200 pgdaemon pagedaemon 32051 54178 0 0 3 0x14200 bored viomb 84885 229922 0 0 3 0x40014200 acpi0 acpi0 25831 220659 0 0 3 0x40014200 idle1 20402 478524 0 0 3 0x14200 bored softnet3 53884 354763 0 0 3 0x14200 bored softnet2 44926 6458 0 0 3 0x14200 bored softnet1 62480 508629 0 0 3 0x14200 bored softnet0 68778 439367 0 0 3 0x14200 bored systqmp 97987 47200 0 0 3 0x14200 bored systq 59600 205147 0 0 3 0x14200 tmoslp softclockmp 38036 438678 0 0 3 0x40014200 tmoslp softclock 37256 772 0 0 3 0x40014200 idle0 1 329432 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 13705 (syz-executor) thread 0xffff8000371ef1f8 (346580) shared rwlock vmmaplk r = 0 (0xfffffd806c72e490) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:172 #2 physio+0x277 sys/kern/kern_physio.c:139 #3 spec_read+0x155 sys/kern/spec_vnops.c:215 #4 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #5 vn_read+0x17b sys/kern/vfs_vnops.c:369 #6 dofilereadv+0x230 sys/kern/sys_generic.c:252 #7 sys_read+0xa2 sys/kern/sys_generic.c:172 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8363b0f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vn_read+0x56 sys/kern/vfs_vnops.c:351 #2 dofilereadv+0x230 sys/kern/sys_generic.c:252 #3 sys_read+0xa2 sys/kern/sys_generic.c:172 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 46922 (syz-executor) thread 0xffff8000ffff6530 (50119) exclusive rrwlock inode r = 0 (0xfffffd806dd724e8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3099 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ced63c8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3084 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10231 11407K 13399K 166960K 14696 0 pcb 20 17K 18K 166960K 348 0 rtable 215 7K 8K 166960K 553 0 pf 41 19K 275K 166960K 193 0 ifaddr 42 7K 8K 166960K 88 0 ifgroup 58 2K 2K 166960K 133 0 sysctl 4 1K 1K 166960K 4 0 counters 64 36K 36K 166960K 108 0 ioctlops 0 0K 8K 166960K 1697 0 iov 0 0K 26K 166960K 109 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1715 108K 108K 166960K 3466 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 28 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 78 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 93K 166960K 1877 0 sigio 0 0K 0K 166960K 41 0 proc 64 79K 128K 166960K 756 0 subproc 104 6K 6K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 302 0 in_multi 93 6K 7K 166960K 231 0 ether_multi 1 0K 0K 166960K 18 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 145 652K 652K 166960K 145 0 exec 0 0K 1K 166960K 709 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 249 74K 87K 166960K 19431 0 UVM aobj 57 10K 10K 166960K 64 0 pinsyscall 41 82K 104K 166960K 3046 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 117 0 NDP 12 0K 2K 166960K 62 0 temp 80 6828K 6908K 166960K 85302 0 kqueue 13 20K 34K 166960K 344 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 178 0 175 2 1 1 2 0 8 0 rtentry 112 174 0 77 4 0 4 4 0 8 0 unpcb 144 1513 0 1494 14 12 2 6 0 8 1 syncache 336 16 0 16 1 1 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 808 598 0 590 11 6 5 5 0 8 4 arp 120 25 0 9 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 336 2447 0 2429 30 20 10 16 0 8 8 nd6 136 41 0 13 2 0 2 2 0 8 0 pkpcb 40 15 0 15 3 2 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 11 0 11 3 2 1 1 0 8 1 pffrag 232 18 0 4 1 0 1 1 0 482 0 pffrnode 88 17 0 4 1 0 1 1 0 8 0 pffrent 40 143 0 128 1 0 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 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 165 0 28 1 0 1 1 0 8 0 pfstkey 128 167 0 29 5 0 5 5 0 8 0 pfstate 376 163 0 28 14 0 14 14 0 8 0 pfrule 1344 29 0 19 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 788 0 345 33 4 29 32 0 8 0 art_table 32 790 0 345 5 1 4 5 0 8 0 art_node 16 162 0 79 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 75 0 65 1 0 1 1 0 8 0 shmpl 112 61 0 7 2 0 2 2 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 4947 0 3447 95 0 95 95 0 8 0 ffsino 272 4947 0 3447 102 1 101 102 0 8 0 nchpl 144 7718 0 6027 64 0 64 64 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 27665 0 27664 1 0 1 1 0 8 0 percpumem 16 68 0 22 1 0 1 1 0 8 0 kstatmem 264 68 0 44 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 11 0 11 3 2 1 1 0 8 1 scxspl 216 27063 0 27063 20 18 2 8 1 8 2 plimitpl 152 478 0 461 1 0 1 1 0 8 0 sigapl 424 2214 0 2143 11 2 9 9 0 8 0 futexpl 64 27556 0 27553 1 0 1 1 0 8 0 knotepl 120 821 0 0 25 0 25 25 0 8 0 kqueuepl 216 875 0 863 14 11 3 9 0 8 2 pipepl 320 378 0 351 10 5 5 8 0 8 2 fdescpl 496 2171 0 2140 5 0 5 5 0 8 0 filepl 152 16160 0 15884 29 11 18 23 0 8 6 lockfpl 104 1006 0 1001 3 2 1 2 0 8 0 lockfspl 48 339 0 334 1 0 1 1 0 8 0 sessionpl 144 38 0 30 1 0 1 1 0 8 0 pgrppl 48 72 0 56 1 0 1 1 0 8 0 ucredpl 104 3014 0 3000 1 0 1 1 0 8 0 zombiepl 144 2144 0 2143 1 0 1 1 0 8 0 processpl 1160 2214 0 2143 7 1 6 6 0 8 0 procpl 648 5131 0 5052 9 1 8 8 0 8 0 srpgc 96 8 0 8 3 2 1 1 0 8 1 sosppl 168 23 0 23 3 2 1 1 0 8 1 sockpl 664 4182 0 4144 39 26 13 18 0 8 8 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 140 0 0 18 0 18 18 0 8 0 mcl2k 2048 39 0 0 5 0 5 5 0 8 0 mtagpl 96 102 0 0 3 0 3 3 0 8 0 mbufpl 256 538 0 0 34 0 34 34 0 8 0 bufpl 280 10205 0 4030 442 0 442 442 0 8 0 anonpl 24 303441 0 294633 105 26 79 100 0 185 3 amapchunkpl 152 75118 0 74450 51 17 34 38 0 158 5 amappl16 200 6657 0 6435 48 23 25 31 0 8 4 amappl15 192 8 0 8 2 2 0 1 0 8 0 amappl14 184 181 0 170 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 2843 0 2812 4 1 3 3 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 10 0 10 1 1 0 1 0 8 0 amappl9 144 188 0 188 1 1 0 1 0 8 0 amappl8 136 16 0 13 1 0 1 1 0 8 0 amappl7 128 164 0 153 1 0 1 1 0 8 0 amappl6 120 175 0 173 1 0 1 1 0 8 0 amappl5 112 151 0 138 1 0 1 1 0 8 0 amappl4 104 366 0 346 1 0 1 1 0 8 0 amappl3 96 11550 0 11452 3 0 3 3 0 8 0 amappl2 88 2617 0 2533 3 0 3 3 0 8 0 amappl1 80 15989 0 15445 15 1 14 15 0 8 0 amappl 88 18801 0 18611 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 3 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 63 0 7 2 0 2 2 0 8 0 uaddrrnd 24 2171 0 2140 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2171 0 2140 1 0 1 1 0 8 0 vmmpekpl 168 19019 0 18974 3 0 3 3 0 8 0 vmmpepl 168 140130 0 138080 113 9 104 108 0 357 4 vmsppl 448 2170 0 2140 6 2 4 5 0 8 0 rwobjpl 56 43851 0 36756 105 0 105 105 0 8 3 pdppl 4096 4349 0 4280 125 54 71 85 0 8 2 pvpl 32 23557 0 0 191 1 190 190 0 265 0 pmappl 248 2170 0 2140 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 475 0 93 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806ddb6d60,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806ddb6d50,1) at rw_enter+0x122 rrw_enter(fffffd806ddb6d50,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805e7fbbd8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805e7fbbd8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd805e7fbbd8,ffff800011a26340,df,0,1,43423beb989ddd38,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd80658fba18) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff8131d350,2902,8000,ffffffff818b3880,ffff80002a0dca08) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80002a0dc870) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806e677eb8,ffff80002a0dca08,0,fffffd807f7d34e0) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806ceb43a8,ffff80002a0dca08,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000371ef1f8,5,ffff80002a0dca08,0,ffff80002a0dcac0) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_read(ffff8000371ef1f8,ffff80002a0dcb70,ffff80002a0dcac0) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80002a0dcb70) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a0dcb70) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaa2d18f06a0, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff8363aef0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8363aef0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80002a112170) at syscall+0x2cc mi_syscall sys/sys/syscall_mi.h:155 [inline] syscall(ffff80002a112170) at syscall+0x2cc sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x798cbb0b0830, count: -6