witness: lock order reversal: 1st 0xffffffff8290fe50 netlock (netlock) 2nd 0xfffffd80673e8030 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{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(fffffd80673e8030,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd80673e8030,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd80673e8020) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800027ae98e0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff800027ae98e0,ffff800027ae9918,ffff800027ae9940) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd80673e8018,2000c000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff800027ae9a70,2000cf00) at kpageflttrap+0x209 kerntrap(ffff800027ae9a70) 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,ffff800027ae9fc0) at ifioctl_get+0x2dd soo_ioctl(ffff800027ae9d20,c0106924,ffff800027ae9fc0,ffff8000ffff3508) at soo_ioctl+0x26c fifo_ioctl(ffff800027ae9e08) at fifo_ioctl+0x104 sys/miscfs/fifofs/fifo_vnops.c:307 VOP_IOCTL(fffffd8076d0d028,c0106924,ffff800027ae9fc0,3,fffffd807f7d86c0,ffff8000ffff3508) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069017ef8,c0106924,ffff800027ae9fc0,ffff8000ffff3508) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff3508,ffff800027aea0d8,ffff800027aea130) at sys_ioctl+0x4a2 syscall(ffff800027aea1a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027aea1a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdc8b782fdb0, count: -18 ddb{1}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be68 rbp 0xffff800027ae95d0 rbx 0x3 rdx 0xffff800000bcdd00 rcx 0 rax 0x3ffff acpi_pdirpa+0x2be67 r8 0xffff800027ae9540 r9 0x8080808080808080 r10 0xb8c195d5fb343086 r11 0x11234ddecd7d17eb r12 0xffffffff82ab04e0 w_lodata+0x52b70 r13 0 r14 0xffffffff82aa83a0 w_lodata+0x4aa30 r15 0xfffffd8002f62d80 rip 0xffffffff8138d658 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800027ae95c0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.6) pid=472014 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff3ce8,0xffff8000ffff5510 process=0xffff80002af3a9a8 user=0xffff800027ae5000, vmspace=0xfffffd80673e8018 estcpu=30, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19102 67935 55440 32767 2 0x10 syz-executor.4 19102 409370 55440 32767 2 0x4000010 syz-executor.4 52058 373577 87417 32767 2 0x10 syz-executor.3 52058 82258 87417 32767 3 0x4000090 fsleep syz-executor.3 65461 281007 70025 32767 3 0x90 nanoslp syz-executor.5 65461 147809 70025 32767 3 0x4000090 fsleep syz-executor.5 3423 483369 59050 32767 2 0x10 syz-executor.6 * 3423 472014 59050 32767 7 0x4000010 syz-executor.6 39096 414511 55117 32767 2 0x10 syz-executor.7 39096 267332 55117 32767 3 0x4000090 fsleep syz-executor.7 83635 275983 97186 32767 2 0x10 syz-executor.0 83635 101976 97186 32767 3 0x4000090 fsleep syz-executor.0 55440 50543 467 32767 3 0x90 nanoslp syz-executor.4 467 230082 52171 0 3 0x82 wait syz-executor.4 36933 141348 0 0 3 0x14200 bored sosplice 70025 46370 92003 32767 3 0x90 nanoslp syz-executor.5 55117 467090 79703 32767 3 0x90 nanoslp syz-executor.7 59050 358708 77225 32767 3 0x90 nanoslp syz-executor.6 79703 153938 52171 0 3 0x82 wait syz-executor.7 77225 120854 52171 0 3 0x82 wait syz-executor.6 87417 490911 7324 32767 3 0x90 nanoslp syz-executor.3 92003 122388 52171 0 3 0x82 wait syz-executor.5 39447 169017 15996 32767 2 0x10 syz-executor.1 97186 206662 10731 32767 3 0x90 nanoslp syz-executor.0 7324 327671 52171 0 3 0x82 wait syz-executor.3 92357 365434 50757 32767 2 0x490 syz-executor.2 50757 486409 52171 0 3 0x82 wait syz-executor.2 15996 4974 52171 0 3 0x82 wait syz-executor.1 10731 342777 52171 0 3 0x82 wait syz-executor.0 52171 40254 84645 0 2 0x82 syz-fuzzer 52171 105143 84645 0 3 0x4000082 nanoslp syz-fuzzer 52171 122247 84645 0 7 0x4000002 syz-fuzzer 52171 451712 84645 0 3 0x4000082 thrsleep syz-fuzzer 52171 500101 84645 0 3 0x4000082 thrsleep syz-fuzzer 52171 187851 84645 0 3 0x4000082 thrsleep syz-fuzzer 52171 324722 84645 0 2 0x4000082 syz-fuzzer 52171 17105 84645 0 3 0x4000082 thrsleep syz-fuzzer 84645 496192 73503 0 3 0x10008a sigsusp ksh 73503 46327 71966 0 2 0x9a sshd 25967 193711 1 0 3 0x100083 ttyin getty 71966 63885 1 0 3 0x88 kqread sshd 19129 380288 57913 73 3 0x1100090 kqread syslogd 57913 430877 1 0 3 0x100082 netio syslogd 32031 472186 1 0 3 0x100080 kqread resolvd 85971 114190 20988 77 3 0x100092 kqread dhcpleased 29461 441488 20988 77 3 0x100092 kqread dhcpleased 20988 345871 1 0 3 0x80 kqread dhcpleased 90399 306639 0 0 3 0x14200 bored smr 4005 232855 0 0 2 0x14200 zerothread 29835 101115 0 0 3 0x14200 aiodoned aiodoned 91486 62679 0 0 3 0x14200 syncer update 30410 115989 0 0 3 0x14200 cleaner cleaner 82202 403242 0 0 3 0x14200 reaper reaper 15913 515368 0 0 3 0x14200 pgdaemon pagedaemon 26140 403945 0 0 3 0x14200 bored viomb 34736 106114 0 0 3 0x40014200 acpi0 acpi0 86228 75844 0 0 3 0x40014200 idle1 67939 4185 0 0 3 0x14200 bored softnet 91142 313962 0 0 3 0x14200 bored systqmp 65669 14967 0 0 3 0x14200 bored systq 60849 242620 0 0 3 0x40014200 bored softclock 93043 313583 0 0 3 0x40014200 idle0 1 391899 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 3423 (syz-executor.6) thread 0xffff8000ffff3508 (472014) 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 52171 (syz-fuzzer) thread 0xffff8000ffff7270 (122247) exclusive rwlock pslock r = 0 (0xffff80002116d5b8) #0 witness_lock+0x44d #1 thrsleep+0x334 sys/kern/kern_synch.c:698 #2 sys___thrsleep+0xad sys/kern/kern_synch.c:746 #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 10174 6407K 6419K 78643K 11270 0 pcb 13 8K 8K 78643K 13 0 rtable 240 6K 7K 78643K 434 0 ifaddr 81 16K 16K 78643K 96 0 sysctl 1 1K 1K 78643K 1 0 counters 56 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 43 0 iov 0 0K 24K 78643K 38 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 1366 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 10 1K 1K 78643K 17 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 109K 78643K 1523 0 sigio 0 0K 0K 78643K 32 0 proc 56 74K 99K 78643K 567 0 subproc 104 6K 6K 78643K 130 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 197 0 in_multi 99 6K 6K 78643K 169 0 ether_multi 1 0K 0K 78643K 11 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 717 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 314 80K 90K 78643K 19238 0 UVM aobj 4 2K 2K 78643K 4 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 46 0 NDP 13 0K 2K 78643K 33 0 temp 124 4703K 4767K 78643K 7325 0 kqueue 12 18K 30K 78643K 114 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 120 101 0 98 1 0 1 1 0 8 0 rtentry 112 134 0 23 4 0 4 4 0 8 0 unpcb 136 450 0 435 1 0 1 1 0 8 0 syncache 296 37 0 37 3 2 1 1 0 8 1 tcpqe 32 45 0 45 2 1 1 1 0 8 1 tcpcb 736 343 0 331 5 2 3 4 0 8 0 arp 120 22 0 4 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 3 1 0 1 1 0 8 0 inpcb 304 776 0 762 3 1 2 2 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 48 31 0 6 1 0 1 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 554 0 88 30 0 30 30 0 8 0 art_table 32 555 0 88 4 0 4 4 0 8 0 art_node 16 133 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0 semupl 112 8 0 8 2 2 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3084 0 1648 91 0 91 91 0 8 0 ffsino 272 3084 0 1648 97 0 97 97 0 8 0 nchpl 144 4935 0 3309 62 0 62 62 0 8 0 uvmvnodes 80 3223 0 0 66 0 66 66 0 8 0 vnodes 224 3223 0 0 190 0 190 190 0 8 0 namei 1024 13901 0 13901 2 1 1 2 0 8 1 percpumem 16 42 0 2 1 0 1 1 0 8 0 scxspl 216 14509 0 14509 9 8 1 8 0 8 1 plimitpl 152 150 0 127 1 0 1 1 0 8 0 sigapl 424 1801 0 1750 7 0 7 7 0 8 0 futexpl 64 8399 0 8395 1 0 1 1 0 8 0 knotepl 120 166 0 0 5 0 5 5 0 8 0 kqueuepl 216 178 0 170 1 0 1 1 0 8 0 pipepl 336 174 0 146 3 0 3 3 0 8 0 fdescpl 496 1786 0 1751 6 1 5 6 0 8 0 filepl 152 5603 0 5366 10 0 10 10 0 8 0 lockfpl 104 94 0 92 1 0 1 1 0 8 0 lockfspl 48 35 0 33 1 0 1 1 0 8 0 sessionpl 144 25 0 9 1 0 1 1 0 8 0 pgrppl 48 26 0 10 1 0 1 1 0 8 0 ucredpl 96 1114 0 1096 1 0 1 1 0 8 0 zombiepl 144 1751 0 1750 1 0 1 1 0 8 0 processpl 1064 1801 0 1750 4 0 4 4 0 8 0 procpl 672 3369 0 3305 7 1 6 7 0 8 0 sosppl 168 10 0 10 1 1 0 1 0 8 0 sockpl 480 1331 0 1299 7 1 6 6 0 8 2 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 14 0 0 2 0 2 2 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k 2048 161 0 0 20 0 20 20 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 425 0 0 26 0 26 26 0 8 0 bufpl 288 5095 0 140 354 0 354 354 0 8 0 anonpl 24 405039 0 394607 73 4 69 70 0 186 0 amapchunkpl 152 44549 0 43819 34 3 31 32 0 158 1 amappl16 200 3025 0 2790 13 0 13 13 0 8 0 amappl15 192 279 0 273 1 0 1 1 0 8 0 amappl14 184 21 0 18 1 0 1 1 0 8 0 amappl13 176 284 0 277 1 0 1 1 0 8 0 amappl12 168 18 0 16 1 0 1 1 0 8 0 amappl11 160 45 0 31 1 0 1 1 0 8 0 amappl10 152 204 0 196 1 0 1 1 0 8 0 amappl9 144 986 0 979 1 0 1 1 0 8 0 amappl8 136 930 0 880 2 0 2 2 0 8 0 amappl7 128 461 0 448 1 0 1 1 0 8 0 amappl6 120 727 0 700 2 1 1 2 0 8 0 amappl5 112 1740 0 1714 1 0 1 1 0 8 0 amappl4 104 847 0 821 1 0 1 1 0 8 0 amappl3 96 202 0 191 1 0 1 1 0 8 0 amappl2 88 751 0 707 3 1 2 3 0 8 0 amappl1 80 32571 0 31941 19 5 14 18 0 8 0 amappl 88 18760 0 18510 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1786 0 1751 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1786 0 1751 1 0 1 1 0 8 0 vmmpekpl 168 14767 0 14717 3 0 3 3 0 8 0 vmmpepl 168 157836 0 155385 123 8 115 120 0 357 2 vmsppl 368 1785 0 1751 4 0 4 4 0 8 0 rwobjpl 56 38736 0 34357 63 1 62 62 0 8 0 pdppl 4096 3579 0 3502 139 58 81 87 0 8 4 pvpl 32 859161 0 843582 245 49 196 244 0 265 61 pmappl 248 1785 0 1751 3 0 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 784 0 63 21 0 21 21 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x40 sys/dev/kcov.c:154 intr_handler(ffff8000211cea30,ffff800000077500) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:144 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __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 sleep_setup(ffff8000211ced30,ffff8000211ced60,120,ffffffff825fb3ed,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:374 thrsleep(ffff8000ffff7270,ffff8000211cee40) at thrsleep+0x500 rwsleep sys/kern/kern_synch.c:315 [inline] thrsleep(ffff8000ffff7270,ffff8000211cee40) at thrsleep+0x500 sys/kern/kern_synch.c:705 sys___thrsleep(ffff8000ffff7270,ffff8000211cee40,ffff8000211ceea0) at sys___thrsleep+0xad sys/kern/kern_synch.c:746 syscall(ffff8000211cef10) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211cef10) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2c001cf40, count: -15 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(fffffd80673e8030,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd80673e8030,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd80673e8020) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800027ae98e0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff800027ae98e0,ffff800027ae9918,ffff800027ae9940) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd80673e8018,2000c000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff800027ae9a70,2000cf00) at kpageflttrap+0x209 kerntrap(ffff800027ae9a70) 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,ffff800027ae9fc0) at ifioctl_get+0x2dd soo_ioctl(ffff800027ae9d20,c0106924,ffff800027ae9fc0,ffff8000ffff3508) at soo_ioctl+0x26c fifo_ioctl(ffff800027ae9e08) at fifo_ioctl+0x104 sys/miscfs/fifofs/fifo_vnops.c:307 VOP_IOCTL(fffffd8076d0d028,c0106924,ffff800027ae9fc0,3,fffffd807f7d86c0,ffff8000ffff3508) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069017ef8,c0106924,ffff800027ae9fc0,ffff8000ffff3508) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff3508,ffff800027aea0d8,ffff800027aea130) at sys_ioctl+0x4a2 syscall(ffff800027aea1a0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027aea1a0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdc8b782fdb0, count: -18