*cpu0: uvm_fault(0xfffffd8008716000, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffbffb0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800027abc3d0 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff800027abc300 r9 0 r10 0xcc353ca7ad2b72a9 r11 0x96ef372951ceed55 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff822f850c proc_trampoline+0xdc cs 0x8 rflags 0x246 rsp 0xffff800027abc350 ss 0 proc_trampoline+0xdc: movl $0,%gs:0x538 ddb{1}> show proc PROC (syz-executor.7) pid=191156 stat=onproc flags process=0 proc=0 pri=84, usrpri=84, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff4fc8,0xffff8000ffff4558 process=0xffff8000fffe9d38 user=0xffff800027ab7000, vmspace=0xfffffd80640c5e78 estcpu=34, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1065 35609 77694 0 3 0x80 fsleep syz-executor.3 1065 401874 77694 0 3 0x4000080 netio syz-executor.3 11041 212025 62773 0 3 0x80 fsleep syz-executor.2 11041 138146 62773 0 7 0x4000000 syz-executor.2 *88761 191156 88972 0 7 0 syz-executor.7 13377 50319 69010 0 2 0 syz-executor.6 77736 106308 48714 0 3 0x80 fsleep syz-executor.4 77736 424513 48714 0 3 0x4000080 ttyout syz-executor.4 88972 12879 9846 0 2 0x482 syz-executor.7 48714 491439 9846 0 2 0x482 syz-executor.4 57515 294609 1 0 3 0x100083 ttyin getty 38218 177746 0 0 3 0x14200 bored sosplice 74279 300083 0 0 3 0x14280 nfsidl nfsio 82284 461678 0 0 3 0x14280 nfsidl nfsio 95747 295401 0 0 3 0x14280 nfsidl nfsio 67929 305044 0 0 3 0x14280 nfsidl nfsio 42333 187692 0 0 3 0x14280 nfsidl nfsio 66056 83856 0 0 3 0x14280 nfsidl nfsio 53303 360976 0 0 3 0x14280 nfsidl nfsio 16159 237624 0 0 3 0x14280 nfsidl nfsio 59265 212069 0 0 3 0x14280 nfsidl nfsio 68904 403594 0 0 3 0x14280 nfsidl nfsio 79347 309086 0 0 3 0x14280 nfsidl nfsio 89834 519307 0 0 3 0x14280 nfsidl nfsio 1628 71182 0 0 3 0x14280 nfsidl nfsio 10534 430875 0 0 3 0x14280 nfsidl nfsio 82812 162453 0 0 3 0x14280 nfsidl nfsio 8305 228784 0 0 3 0x14280 nfsidl nfsio 75866 479833 0 0 3 0x14280 nfsidl nfsio 94596 482641 0 0 3 0x14280 nfsidl nfsio 23888 473078 0 0 3 0x14280 nfsidl nfsio 9707 26839 0 0 3 0x14280 nfsidl nfsio 74476 62863 9846 0 2 0x2 syz-executor.1 69010 114265 9846 0 2 0x482 syz-executor.6 1937 130667 9846 0 2 0x482 syz-executor.5 62773 433512 9846 0 3 0x82 nanoslp syz-executor.2 77694 509802 9846 0 3 0x82 nanoslp syz-executor.3 23809 417458 9846 0 2 0x482 syz-executor.0 9846 117876 97024 0 3 0x82 thrsleep syz-fuzzer 9846 216253 97024 0 3 0x4000082 nanoslp syz-fuzzer 9846 393105 97024 0 3 0x4000082 thrsleep syz-fuzzer 9846 429260 97024 0 3 0x4000082 thrsleep syz-fuzzer 9846 247197 97024 0 3 0x4000082 thrsleep syz-fuzzer 9846 237372 97024 0 3 0x4000082 thrsleep syz-fuzzer 9846 241145 97024 0 3 0x4000082 kqread syz-fuzzer 9846 404457 97024 0 3 0x4000082 thrsleep syz-fuzzer 9846 328503 97024 0 3 0x4000082 thrsleep syz-fuzzer 9846 130819 97024 0 3 0x4000082 thrsleep syz-fuzzer 97024 424872 88935 0 3 0x10008a sigsusp ksh 88935 141214 34412 0 3 0x9a kqread sshd 34412 82950 1 0 3 0x88 kqread sshd 6715 395949 65903 74 3 0x1100092 bpf pflogd 65903 305573 1 0 3 0x80 netio pflogd 1410 60377 73942 73 3 0x1100090 kqread syslogd 73942 70434 1 0 3 0x100082 netio syslogd 31480 206286 1 0 3 0x100080 kqread resolvd 21873 117995 39714 77 3 0x100092 kqread dhcpleased 6468 246419 39714 77 3 0x100092 kqread dhcpleased 39714 246083 1 0 3 0x80 kqread dhcpleased 97161 144570 0 0 3 0x14200 bored smr 76263 322840 0 0 2 0x14200 zerothread 26265 235098 0 0 3 0x14200 aiodoned aiodoned 99153 188997 0 0 3 0x14200 syncer update 48058 441302 0 0 3 0x14200 cleaner cleaner 1166 35368 0 0 3 0x14200 reaper reaper 42661 50116 0 0 3 0x14200 pgdaemon pagedaemon 9400 303070 0 0 3 0x14200 bored viomb 66828 339630 0 0 3 0x40014200 acpi0 acpi0 38162 289641 0 0 3 0x40014200 idle1 65728 442825 0 0 3 0x14200 bored softnet 79691 78 0 0 3 0x14200 bored systqmp 671 456091 0 0 3 0x14200 bored systq 15959 297719 0 0 3 0x40014200 bored softclock 39128 29594 0 0 3 0x40014200 idle0 1 365519 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8064355020) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_enter+0x1b8 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_enter+0x1b8 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_enter+0x1b8 sys/arch/amd64/amd64/pmap.c:2691 #4 uvm_fault_upper_lookup+0x2b3 sys/uvm/uvm_fault.c:887 #5 uvm_fault+0x139 sys/uvm/uvm_fault.c:607 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 Process 11041 (syz-executor.2) thread 0xffff800021203ce0 (138146) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b6e770) #0 witness_lock+0x44d #1 kpageflttrap+0x23d sys/arch/amd64/amd64/trap.c:274 #2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #3 alltraps_kern_meltdown+0x7b #4 socreate+0x84 sys/kern/uipc_socket.c:172 #5 sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 88761 (syz-executor.7) thread 0xffff8000ffff57a8 (191156) exclusive rwlock amaplk r = 0 (0xfffffd80684570f0) #0 witness_lock+0x44d #1 uvm_fault_check+0x3ca sys/uvm/uvm_fault.c:774 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd80640c5e90) #0 witness_lock+0x44d #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 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8064355020) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_enter+0x1b8 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_enter+0x1b8 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_enter+0x1b8 sys/arch/amd64/amd64/pmap.c:2691 #4 uvm_fault_upper_lookup+0x2b3 sys/uvm/uvm_fault.c:887 #5 uvm_fault+0x139 sys/uvm/uvm_fault.c:607 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 Process 74476 (syz-executor.1) thread 0xffff80002c957cf0 (62863) exclusive rrwlock inode r = 0 (0xfffffd807d071c48) #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 (0xfffffd807d071a28) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 6487K 6810K 78643K 14429 0 pcb 13 11K 12K 78643K 191 0 rtable 260 11K 11K 78643K 849 0 ifaddr 100 21K 21K 78643K 265 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 94 0 ioctlops 0 0K 4K 78643K 1723 0 iov 0 0K 16K 78643K 152 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1401 88K 88K 78643K 3015 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 11 0K 0K 78643K 11 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 93K 78643K 1677 0 sigio 0 0K 0K 78643K 69 0 proc 69 87K 124K 78643K 849 0 subproc 104 6K 6K 78643K 251 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 29 0 in_multi 99 6K 6K 78643K 255 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 193 864K 864K 78643K 193 0 exec 0 0K 2K 78643K 1188 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 322 130K 132K 78643K 22494 0 UVM aobj 34 2K 2K 78643K 37 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 51 0 NDP 13 0K 2K 78643K 74 0 temp 136 4707K 8801K 78643K 15964 0 kqueue 12 18K 22K 78643K 104 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 120 134 0 131 2 0 2 2 0 8 1 rtentry 112 242 0 131 4 0 4 4 0 8 0 unpcb 136 962 0 945 13 4 9 9 0 8 8 syncache 296 7 0 7 2 2 0 1 0 8 0 tcpqe 32 81 0 81 2 2 0 1 0 8 0 tcpcb 736 428 0 422 16 14 2 7 0 8 0 arp 120 41 0 23 1 0 1 1 0 8 0 inpcb 304 969 0 960 23 22 1 6 0 8 0 rttmr 72 3 0 3 1 1 0 1 0 8 0 ip6q 72 6 0 6 2 2 0 1 0 8 0 ip6af 40 18 0 18 2 2 0 1 0 8 0 nd6 48 62 0 37 1 0 1 1 0 8 0 kcovpl 48 19 0 11 1 0 1 1 0 8 0 pfstscr 40 4 0 4 1 1 0 1 0 8 0 pffrag 232 15 0 15 1 1 0 1 0 482 0 pffrnode 88 15 0 15 1 1 0 1 0 8 0 pffrent 40 115 0 115 1 1 0 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 pfrktable 1344 13 0 6 1 0 1 1 0 8 0 pfstitem 24 19 0 17 1 0 1 1 0 8 0 pfstkey 112 27 0 25 1 0 1 1 0 8 0 pfstate 320 23 0 21 2 1 1 2 0 8 0 pfrule 1360 91 0 67 4 1 3 3 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 972 0 488 38 7 31 31 0 8 0 art_table 32 973 0 488 4 0 4 4 0 8 0 art_node 16 241 0 140 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 34 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3451 0 2013 91 0 91 91 0 8 0 ffsino 272 3451 0 2013 97 0 97 97 0 8 0 nchpl 144 5662 0 4030 63 0 63 63 0 8 0 uvmvnodes 80 4995 0 0 102 0 102 102 0 8 0 vnodes 224 4995 0 0 294 0 294 294 0 8 0 namei 1024 21502 0 21502 3 2 1 2 0 8 1 percpumem 16 59 0 19 1 0 1 1 0 8 0 vcpupl 2048 3 0 0 1 0 1 1 0 8 0 vmpool 560 3 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 9 0 0 1 0 1 1 0 8 0 scxspl 216 16046 0 16046 10 9 1 8 0 8 1 plimitpl 152 292 0 276 1 0 1 1 0 8 0 sigapl 424 1980 0 1915 8 0 8 8 0 8 0 futexpl 64 13763 0 13760 1 0 1 1 0 8 0 knotepl 120 200 0 0 6 1 5 6 0 8 0 kqueuepl 216 331 0 323 9 8 1 5 0 8 0 pipepl 336 410 0 382 13 10 3 8 0 8 0 fdescpl 496 1945 0 1917 5 1 4 5 0 8 0 filepl 152 11669 0 11425 41 23 18 19 0 8 8 lockfpl 104 216 0 214 1 0 1 1 0 8 0 lockfspl 48 104 0 102 1 0 1 1 0 8 0 sessionpl 144 36 0 19 1 0 1 1 0 8 0 pgrppl 48 46 0 29 1 0 1 1 0 8 0 ucredpl 96 1952 0 1940 1 0 1 1 0 8 0 zombiepl 144 1917 0 1915 1 0 1 1 0 8 0 processpl 1064 1980 0 1915 5 0 5 5 0 8 0 procpl 672 4986 0 4909 13 5 8 9 0 8 0 srpgc 96 18 0 18 3 3 0 1 0 8 0 sosppl 168 5 0 5 1 1 0 1 0 8 0 sockpl 480 2065 0 2036 68 56 12 34 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 421 0 0 53 0 53 53 0 8 0 mtagpl 96 162 0 0 4 0 4 4 0 8 0 mbufpl 256 529 0 0 30 0 30 30 0 8 0 bufpl 288 5907 0 187 409 0 409 409 0 8 0 anonpl 24 492693 0 476763 137 17 120 131 0 186 0 amapchunkpl 152 53009 0 52191 43 6 37 39 0 158 0 amappl16 200 4336 0 3780 42 12 30 36 0 8 0 amappl15 192 402 0 395 1 0 1 1 0 8 0 amappl14 184 18 0 14 1 0 1 1 0 8 0 amappl13 176 165 0 163 1 0 1 1 0 8 0 amappl12 168 552 0 549 2 1 1 1 0 8 0 amappl11 160 317 0 300 1 0 1 1 0 8 0 amappl10 152 64 0 55 1 0 1 1 0 8 0 amappl9 144 655 0 649 1 0 1 1 0 8 0 amappl8 136 986 0 925 3 0 3 3 0 8 0 amappl7 128 363 0 347 1 0 1 1 0 8 0 amappl6 120 401 0 378 2 1 1 2 0 8 0 amappl5 112 1350 0 1332 1 0 1 1 0 8 0 amappl4 104 1409 0 1379 2 0 2 2 0 8 0 amappl3 96 840 0 825 1 0 1 1 0 8 0 amappl2 88 1046 0 996 3 1 2 3 0 8 0 amappl1 80 38251 0 37696 20 6 14 19 0 8 0 amappl 88 21843 0 21603 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 36 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1948 0 1917 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1948 0 1917 1 0 1 1 0 8 0 vmmpekpl 168 20026 0 19974 3 0 3 3 0 8 0 vmmpepl 168 185281 0 182869 192 66 126 146 0 357 9 vmsppl 368 1947 0 1917 4 0 4 4 0 8 0 rwobjpl 56 49756 0 43195 95 1 94 94 0 8 1 pdppl 4096 3903 0 3837 235 163 72 83 0 8 6 pvpl 32 968675 0 948431 263 71 192 262 0 265 0 pmappl 248 1947 0 1917 3 0 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1011 0 199 24 0 24 24 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82999ff0) 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 x86_bus_space_io_write_1(3f8,0,65) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,65) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,65) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(65) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(65) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff8262938c) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825d93ee) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff8000246aac00,0) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff8000246aac00) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b socreate(18,ffff8000246aad28,3,3c) at socreate+0x84 sys/kern/uipc_socket.c:172 end trace frame: 0xffff8000246aada0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82999ff0) 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 x86_bus_space_io_write_1(3f8,0,65) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,65) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,65) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(65) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(65) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff8262938c) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825d93ee) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff8000246aac00,0) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff8000246aac00) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b socreate(18,ffff8000246aad28,3,3c) at socreate+0x84 sys/kern/uipc_socket.c:172 sys_socket(ffff800021203ce0,ffff8000246aadb8,ffff8000246aae10) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:96 syscall(ffff8000246aae80) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246aae80) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9ed72c40720, count: -17 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xdc: movl $0,%gs:0x538 proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffbffb0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffbffb0, count: -1