login: witness: lock order reversal: 1st 0xffffffff8290fe50 netlock (netlock) 2nd 0xfffffd8068daf760 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 soo_ioctl+0x26c #9 sys_ioctl+0x4a2 #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 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(fffffd8068daf760,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd8068daf760,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd8068daf750) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800027cca110,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff800027cca110,ffff800027cca148,ffff800027cca170) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd8068daf748,20ff9000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff800027cca2a0,20ff9000) at kpageflttrap+0x209 kerntrap(ffff800027cca2a0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 soo_ioctl(fffffd807e819020,c0286988,ffff800027cca4c0,ffff80002467b7a8) at soo_ioctl+0x26c sys_ioctl(ffff80002467b7a8,ffff800027cca5d8,ffff800027cca630) at sys_ioctl+0x4a2 syscall(ffff800027cca6a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027cca6a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6c8e370e330, count: -14 ddb{0}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be68 rbp 0xffff800027cc9e00 rbx 0x3 rdx 0xffff800000bc1680 rcx 0 rax 0x3ffff acpi_pdirpa+0x2be67 r8 0xffff800027cc9d70 r9 0x8080808080808080 r10 0x67afde7cc5831b0f r11 0xbfe58966184083a2 r12 0xffffffff82ab0380 w_lodata+0x52a10 r13 0 r14 0xffffffff82aa78a0 w_lodata+0x49f30 r15 0xfffffd8002f62d80 rip 0xffffffff8138d658 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800027cc9df0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=63060 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff80002467b268,0xffffffff82b3d400 process=0xffff8000fffee588 user=0xffff800027cc5000, vmspace=0xfffffd8068daf748 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69819 81382 73141 32767 7 0x10 syz-executor.3 80205 231295 5788 32767 2 0x10 syz-executor.0 *80205 63060 5788 32767 7 0x4000010 syz-executor.0 93868 438832 53891 32767 2 0x10 syz-executor.6 93868 126738 53891 32767 3 0x4000090 fsleep syz-executor.6 2274 321129 82076 32767 2 0x10 syz-executor.4 2274 220329 82076 32767 3 0x4000090 fsleep syz-executor.4 60091 150430 0 0 3 0x14200 bored sosplice 88589 402729 61068 32767 2 0x10 syz-executor.2 61068 431763 75480 0 3 0x82 wait syz-executor.2 30139 78595 51104 32767 3 0x10 biowait syz-executor.7 53891 462386 52976 32767 3 0x90 nanoslp syz-executor.6 51104 516767 75480 0 3 0x82 wait syz-executor.7 82076 41075 17319 32767 3 0x90 nanoslp syz-executor.4 91967 23288 81271 32767 3 0x10 biowait syz-executor.5 52976 305194 75480 0 3 0x82 wait syz-executor.6 81271 326308 75480 0 3 0x82 wait syz-executor.5 17319 180365 75480 0 3 0x82 wait syz-executor.4 50488 36375 39641 32767 3 0x90 nanoslp syz-executor.1 73141 204421 59644 32767 3 0x90 nanoslp syz-executor.3 59644 244034 75480 0 3 0x82 wait syz-executor.3 5788 284922 34297 32767 3 0x90 nanoslp syz-executor.0 39641 510690 75480 0 3 0x82 wait syz-executor.1 34297 59619 75480 0 3 0x82 wait syz-executor.0 75480 504048 1012 0 3 0x82 thrsleep syz-fuzzer 75480 171009 1012 0 3 0x4000082 thrsleep syz-fuzzer 75480 64804 1012 0 3 0x4000082 thrsleep syz-fuzzer 75480 404523 1012 0 3 0x4000082 thrsleep syz-fuzzer 75480 27668 1012 0 3 0x4000082 thrsleep syz-fuzzer 75480 441192 1012 0 3 0x4000082 thrsleep syz-fuzzer 75480 310199 1012 0 3 0x4000082 kqread syz-fuzzer 75480 114305 1012 0 3 0x4000082 thrsleep syz-fuzzer 75480 516652 1012 0 3 0x4000082 thrsleep syz-fuzzer 1012 42781 50745 0 3 0x10008a sigsusp ksh 50745 352497 79743 0 3 0x9a kqread sshd 1872 190011 1 0 3 0x100083 ttyin getty 79743 3938 1 0 3 0x88 kqread sshd 25761 211754 59806 73 3 0x1100090 kqread syslogd 59806 86362 1 0 3 0x100082 netio syslogd 33631 521429 1 0 3 0x100080 kqread resolvd 73459 294670 55575 77 3 0x100092 kqread dhcpleased 21081 118817 55575 77 3 0x100092 kqread dhcpleased 55575 240452 1 0 3 0x80 kqread dhcpleased 32119 230833 0 0 3 0x14200 bored smr 20983 356215 0 0 2 0x14200 zerothread 39280 320530 0 0 3 0x14200 aiodoned aiodoned 26683 174629 0 0 3 0x14200 syncer update 45993 473684 0 0 3 0x14200 cleaner cleaner 43987 52755 0 0 3 0x14200 reaper reaper 3441 378734 0 0 3 0x14200 pgdaemon pagedaemon 13234 176163 0 0 3 0x14200 bored viomb 49375 425100 0 0 3 0x40014200 acpi0 acpi0 21056 327258 0 0 3 0x40014200 idle1 72116 132448 0 0 3 0x14200 bored softnet 28739 131744 0 0 3 0x14200 bored systqmp 99330 100913 0 0 3 0x14200 bored systq 19919 63055 0 0 3 0x40014200 bored softclock 12676 196369 0 0 3 0x40014200 idle0 1 435147 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 80205 (syz-executor.0) thread 0xffff80002467b7a8 (63060) shared rwlock netlock r = 0 (0xffffffff8290fe50) #0 witness_lock+0x44d #1 ifioctl_get+0x3f0 sys/net/if.c:2348 #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 Process 30139 (syz-executor.7) thread 0xffff80002c148fd0 (78595) exclusive rrwlock inode r = 0 (0xfffffd806e6931b0) #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 (0xfffffd8068d311b0) #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 Process 91967 (syz-executor.5) thread 0xffff80002467a2a8 (23288) exclusive rrwlock inode r = 0 (0xfffffd8068ee41b8) #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 (0xfffffd8068d315f0) #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 10174 6407K 6419K 78643K 11267 0 pcb 13 8K 8K 78643K 13 0 rtable 242 7K 7K 78643K 394 0 ifaddr 81 16K 16K 78643K 89 0 counters 56 35K 35K 78643K 58 0 ioctlops 0 0K 2K 78643K 43 0 iov 0 0K 16K 78643K 25 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1270 79K 79K 78643K 1316 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 11 1K 1K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 117K 78643K 702 0 sigio 0 0K 0K 78643K 8 0 proc 56 74K 111K 78643K 507 0 subproc 104 6K 6K 78643K 117 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 53 0 in_multi 99 6K 7K 78643K 123 0 ether_multi 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 2K 78643K 666 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 293 79K 84K 78643K 9619 0 UVM aobj 10 2K 2K 78643K 10 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 25 0 NDP 11 0K 2K 78643K 30 0 temp 94 4699K 4763K 78643K 5429 0 kqueue 12 18K 22K 78643K 57 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 50 0 47 1 0 1 1 0 8 0 rtentry 112 124 0 12 4 0 4 4 0 8 0 unpcb 136 169 0 155 1 0 1 1 0 8 0 syncache 296 8 0 8 3 2 1 1 0 8 1 tcpqe 32 29 0 29 2 1 1 1 0 8 1 tcpcb 736 107 0 96 2 0 2 2 0 8 0 arp 120 21 0 2 1 0 1 1 0 8 0 ipq 40 4 0 4 1 0 1 1 0 8 1 ipqe 40 8 0 8 1 0 1 1 0 8 1 inpcb 304 277 0 268 3 1 2 2 0 8 1 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 4 0 4 1 1 0 1 0 8 0 nd6 48 28 0 3 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 499 0 44 29 0 29 29 0 8 0 art_table 32 500 0 44 4 0 4 4 0 8 0 art_node 16 123 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 11 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 7 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2117 0 686 90 0 90 90 0 8 0 ffsino 272 2117 0 686 96 0 96 96 0 8 0 nchpl 144 3022 0 1401 62 0 62 62 0 8 0 uvmvnodes 80 2243 0 0 46 0 46 46 0 8 0 vnodes 224 2243 0 0 132 0 132 132 0 8 0 namei 1024 9011 0 9011 2 1 1 2 0 8 1 percpumem 16 41 0 1 1 0 1 1 0 8 0 scxspl 216 9519 0 9517 9 2 7 8 0 8 6 plimitpl 152 73 0 50 1 0 1 1 0 8 0 sigapl 424 975 0 926 7 1 6 7 0 8 0 futexpl 64 2968 0 2966 1 0 1 1 0 8 0 knotepl 120 350 0 0 11 0 11 11 0 8 0 kqueuepl 216 92 0 83 1 0 1 1 0 8 0 pipepl 336 175 0 147 3 0 3 3 0 8 0 fdescpl 496 960 0 927 7 2 5 6 0 8 0 filepl 152 3082 0 2846 10 0 10 10 0 8 0 lockfpl 104 32 0 30 1 0 1 1 0 8 0 lockfspl 48 15 0 13 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 25 0 9 1 0 1 1 0 8 0 ucredpl 96 466 0 448 1 0 1 1 0 8 0 zombiepl 144 927 0 926 1 0 1 1 0 8 0 processpl 1064 975 0 926 5 1 4 4 0 8 0 procpl 672 1619 0 1559 6 0 6 6 0 8 0 sosppl 168 28 0 28 1 0 1 1 0 8 1 sockpl 480 497 0 472 5 1 4 5 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 150 0 0 19 0 19 19 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 356 0 0 22 0 22 22 0 8 0 bufpl 288 4404 0 139 305 0 305 305 0 8 0 anonpl 24 208649 0 196747 86 0 86 86 0 186 8 amapchunkpl 152 22100 0 21407 34 1 33 33 0 158 2 amappl16 200 1843 0 1531 25 2 23 24 0 8 6 amappl15 192 227 0 219 1 0 1 1 0 8 0 amappl14 184 78 0 72 2 1 1 1 0 8 0 amappl13 176 86 0 84 1 0 1 1 0 8 0 amappl12 168 169 0 165 2 1 1 1 0 8 0 amappl11 160 111 0 99 1 0 1 1 0 8 0 amappl10 152 99 0 94 1 0 1 1 0 8 0 amappl9 144 550 0 544 1 0 1 1 0 8 0 amappl8 136 652 0 600 2 0 2 2 0 8 0 amappl7 128 209 0 194 1 0 1 1 0 8 0 amappl6 120 282 0 256 2 1 1 2 0 8 0 amappl5 112 668 0 648 1 0 1 1 0 8 0 amappl4 104 952 0 922 2 0 2 2 0 8 0 amappl3 96 335 0 320 1 0 1 1 0 8 0 amappl2 88 607 0 562 3 1 2 3 0 8 0 amappl1 80 19345 0 18743 18 4 14 18 0 8 0 amappl 88 9169 0 8942 7 0 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 960 0 927 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 960 0 927 1 0 1 1 0 8 0 vmmpekpl 168 10645 0 10588 3 0 3 3 0 8 0 vmmpepl 168 88353 0 85988 118 0 118 118 0 357 3 vmsppl 368 959 0 927 4 0 4 4 0 8 0 rwobjpl 56 23317 0 19859 52 2 50 50 0 8 0 pdppl 4096 1927 0 1854 117 36 81 93 0 8 8 pvpl 32 501010 0 484211 247 15 232 247 0 265 88 pmappl 248 959 0 927 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 700 0 39 19 0 19 19 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(fffffd8068daf760,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd8068daf760,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd8068daf750) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800027cca110,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff800027cca110,ffff800027cca148,ffff800027cca170) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd8068daf748,20ff9000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff800027cca2a0,20ff9000) at kpageflttrap+0x209 kerntrap(ffff800027cca2a0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 soo_ioctl(fffffd807e819020,c0286988,ffff800027cca4c0,ffff80002467b7a8) at soo_ioctl+0x26c sys_ioctl(ffff80002467b7a8,ffff800027cca5d8,ffff800027cca630) at sys_ioctl+0x4a2 syscall(ffff800027cca6a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027cca6a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6c8e370e330, count: -14 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 syscall(ffff80002466e540) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002466e540) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8380, count: -6