*cpu1: uvm_fault(0xfffffd800b063b70, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7277f69f6ad0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a348870 rbx 0 rdx 0 rcx 0xffff80003c440aa0 rax 0x2a r8 0xffff80002a3487a0 r9 0x1 r10 0x8e7e8be68b9f2cbc r11 0xfd5702e9fc68dcf5 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81fe54c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a3487f0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=225016 pid=3658 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c441a30,0xffff80002a260d20 process=0xffff8000fffed828 user=0xffff80002a343000, vmspace=0xfffffd800b0631e8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69001 447474 79222 0 2 0 syz-executor * 3658 225016 19725 0 7 0 syz-executor 3658 319465 19725 0 3 0x4000080 fsleep syz-executor 783 101139 2136 0 2 0 syz-executor 783 279703 2136 0 2 0x4000000 syz-executor 783 265734 2136 0 3 0x4000080 fsleep syz-executor 783 196061 2136 0 3 0x4000080 fsleep syz-executor 53175 206816 31298 0 2 0 syz-executor 53175 386757 31298 0 3 0x4000080 fsleep syz-executor 53175 162886 31298 0 3 0x4000080 fsleep syz-executor 81591 257813 23640 0 2 0 syz-executor 81591 14606 23640 0 3 0x4000080 netacc syz-executor 81591 285623 23640 0 3 0x4000080 fsleep syz-executor 81591 399621 23640 0 2 0x4000000 syz-executor 36130 259389 80693 0 2 0x1 syz-executor 36130 421390 80693 0 3 0x4000080 fsleep syz-executor 36130 413972 80693 0 7 0x4000000 syz-executor 36130 339150 80693 0 3 0x4000080 fsleep syz-executor 24879 358163 41546 0 2 0x1 syz-executor 24879 397652 41546 0 2 0x4000000 syz-executor 24879 44782 41546 0 3 0x4000000 inode syz-executor 24879 99895 41546 0 3 0x4000000 fltagain2 syz-executor 24879 309012 41546 0 3 0x4000000 pipecl syz-executor 24879 70071 41546 0 3 0x4000080 fsleep syz-executor 51503 428997 0 0 3 0x14200 acct acct 47087 184266 0 0 3 0x14280 nfsidl nfsio 5925 14560 0 0 3 0x14280 nfsidl nfsio 49944 74373 0 0 3 0x14280 nfsidl nfsio 49465 91563 0 0 3 0x14280 nfsidl nfsio 23640 327040 20961 0 3 0x82 nanoslp syz-executor 80831 80020 20961 0 2 0x10000003 syz-executor 43053 485944 1 0 3 0x100083 ttyin getty 19725 166712 20961 0 3 0x82 nanoslp syz-executor 2136 373889 20961 0 2 0x3 syz-executor 80693 510170 20961 0 3 0x82 nanoslp syz-executor 31298 120916 20961 0 3 0x82 nanoslp syz-executor 79222 229060 20961 0 3 0x82 nanoslp syz-executor 41546 139567 20961 0 2 0x2 syz-executor 20961 292560 39468 0 3 0x82 kqread syz-executor 39468 347962 88294 0 3 0x10008a sigsusp ksh 88294 64331 59396 0 3 0x98 kqread sshd-session 59396 219289 83723 0 3 0x92 kqread sshd-session 83723 176795 1 0 3 0x88 kqread sshd 60988 320009 40618 74 3 0x1100092 bpf pflogd 40618 442426 1 0 3 0x80 sbwait pflogd 40725 434034 67604 73 3 0x1100090 kqread syslogd 67604 322502 1 0 3 0x100082 sbwait syslogd 7736 14863 1 0 3 0x100080 kqread resolvd 38229 128588 45178 77 3 0x100092 kqread dhcpleased 88646 352324 45178 77 3 0x100092 kqread dhcpleased 45178 307023 1 0 3 0x80 kqread dhcpleased 16230 302264 0 0 3 0x14200 bored smr 33859 430064 0 0 2 0x14200 zerothread 42356 353571 0 0 3 0x14200 aiodoned aiodoned 30389 195334 0 0 3 0x14200 syncer update 40121 421195 0 0 3 0x14200 cleaner cleaner 79387 341408 0 0 3 0x14200 reaper reaper 46341 332598 0 0 3 0x14200 pgdaemon pagedaemon 39574 247240 0 0 3 0x14200 bored viomb 48622 142661 0 0 3 0x40014200 acpi0 acpi0 53271 352339 0 0 3 0x40014200 idle1 12706 420655 0 0 3 0x14200 bored softnet1 7093 286276 0 0 3 0x14200 bored softnet0 67798 471143 0 0 3 0x14200 bored systqmp 6677 142038 0 0 3 0x14200 bored systq 40978 95173 0 0 3 0x14200 tmoslp softclockmp 96569 508102 0 0 3 0x40014200 tmoslp softclock 67551 65612 0 0 3 0x40014200 idle0 1 224525 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806a061010) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #3 uvm_fault_lower_lookup+0x369 sys/uvm/uvm_fault.c:-1 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #8 recall_trap+0x8 Process 3658 (syz-executor) thread 0xffff80003c440aa0 (225016) shared rwlock uobjlk r = 0 (0xfffffd807bdd8b78) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd800b0632e8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806a061010) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #3 uvm_fault_lower_lookup+0x369 sys/uvm/uvm_fault.c:-1 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #8 recall_trap+0x8 Process 36130 (syz-executor) thread 0xffff80003c4402d8 (413972) exclusive rwlock dtlk r = 0 (0xffffffff837d06a8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 dt_ioctl_record_stop+0x2e sys/dev/dt/dt_dev.c:572 #3 dtioctl+0x536 sys/dev/dt/dt_dev.c:325 #4 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838d1540) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #4 Xsyscall+0x128 Process 24879 (syz-executor) thread 0xffff80002a261ca0 (397652) exclusive rrwlock inode r = 0 (0xfffffd806f0c8c98) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11120 12222K 14132K 166960K 17984 0 pcb 18 20K 40K 166960K 1571 0 rtable 244 15K 15K 166960K 1205 0 pf 37 18K 81K 166960K 554 0 ifaddr 38 8K 10K 166960K 376 0 ifgroup 58 2K 3K 166960K 744 0 sysctl 4 1K 9K 166960K 72 0 counters 70 37K 39K 166960K 760 0 ioctlops 0 0K 4K 166960K 2820 0 iov 0 0K 32K 166960K 495 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1450 91K 92K 166960K 4888 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 287 0 dirhash 12 2K 3K 166960K 120 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 110K 166960K 4714 0 sigio 0 0K 0K 166960K 150 0 proc 72 115K 196K 166960K 1273 0 subproc 72 4K 4K 166960K 164 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 690 0 in_multi 70 5K 7K 166960K 427 0 ether_multi 1 0K 0K 166960K 59 0 mrt 1 0K 0K 166960K 35 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 1321 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 41 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 269 169K 195K 166960K 43684 0 UVM aobj 77 38K 38K 166960K 98 0 pinsyscall 42 84K 108K 166960K 6216 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 387 0 NDP 12 0K 2K 166960K 286 0 temp 87 8688K 8816K 166960K 232169 0 kqueue 14 22K 30K 166960K 962 0 SYN cache 2 8K 16K 166960K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 327 0 324 1 0 1 1 0 8 0 rtentry 176 333 0 246 6 1 5 6 0 8 0 unpcb 144 3039 0 3021 27 23 4 6 0 8 3 syncache 336 35 0 35 9 8 1 1 0 8 1 tcpqe 32 47 0 47 5 4 1 1 0 8 1 tcpcb 736 1512 0 1496 28 26 2 7 0 8 0 arp 136 48 0 28 1 0 1 1 0 8 0 inpcb 328 5972 0 5952 62 56 6 15 0 8 3 nd6 152 64 0 44 2 1 1 2 0 8 0 pkpcb 40 147 0 147 11 10 1 1 0 8 1 kcovpl 48 18 0 10 1 0 1 1 0 8 0 mppekey 1024 6 0 6 5 5 0 1 0 8 0 ppxss 1192 257 0 257 5 4 1 1 0 8 1 pppxif 1504 42 0 42 10 9 1 1 0 8 1 pffrag 232 39 0 26 2 1 1 1 0 482 0 pffrnode 88 35 0 22 2 1 1 1 0 8 0 pffrent 40 101 0 88 2 1 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 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfstitem 24 1 0 0 1 0 1 1 0 8 0 pfstkey 128 1 0 0 1 0 1 1 0 8 0 pfstate 448 1 0 0 1 0 1 1 0 8 0 pfrule 1360 1 0 1 1 1 0 1 0 8 0 rttmr 136 7 0 7 6 6 0 1 0 8 0 art_heap8 4096 6 0 1 6 0 6 6 0 8 1 art_heap4 256 1577 0 1220 42 17 25 31 0 8 0 art_table 40 1583 0 1221 5 0 5 5 0 8 0 art_node 32 333 0 258 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 20 1 0 1 1 0 8 0 semapl 112 281 0 271 1 0 1 1 0 8 0 shmpl 112 66 0 9 2 0 2 2 0 8 0 dirhash 1024 89 0 72 3 0 3 3 0 8 0 dino2pl 256 10863 0 9329 97 0 97 97 0 8 0 ffsino 296 10863 0 9329 120 1 119 119 0 8 0 nchpl 144 17273 0 15548 65 0 65 65 0 8 0 rtmask 32 47 0 47 8 7 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 62559 0 62559 5 4 1 2 0 8 1 percpumem 16 395 0 345 1 0 1 1 0 8 0 vcpupl 3968 22 0 5 3 0 3 3 0 8 0 vmpool 848 28 0 11 2 0 2 2 0 8 0 kstatmem 264 492 0 464 8 5 3 3 0 8 0 acpiwqpl 32 5 0 5 1 0 1 1 1 8 1 scsiplug 72 24 0 24 11 11 0 1 0 8 0 scxspl 216 172011 0 172011 17 16 1 8 1 8 1 plimitpl 152 1631 0 1612 1 0 1 1 0 8 0 sigapl 424 5046 0 4993 9 2 7 8 0 8 0 knotepl 120 908 0 0 24 0 24 24 0 8 0 kqueuepl 224 1795 0 1785 16 14 2 5 0 8 1 pipepl 344 972 0 942 13 10 3 9 0 8 0 fdescpl 528 4988 0 4957 3 0 3 3 0 8 0 filepl 160 36147 0 35911 41 28 13 18 0 8 0 lockfpl 104 1984 0 1980 5 4 1 2 0 8 0 lockfspl 48 631 0 627 1 0 1 1 0 8 0 sessionpl 144 62 0 53 1 0 1 1 0 8 0 pgrppl 48 240 0 223 1 0 1 1 0 8 0 ucredpl 104 6608 0 6593 1 0 1 1 0 8 0 zombiepl 144 5116 0 5115 1 0 1 1 0 8 0 processpl 1232 5046 0 4993 6 0 6 6 0 8 0 procpl 664 12757 0 12687 9 2 7 8 0 8 0 sosppl 176 35 0 35 9 8 1 1 0 8 1 sockpl 752 9772 0 9729 94 83 11 20 0 8 5 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 135 0 0 16 0 16 16 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 142 0 0 8 0 8 8 0 8 1 mtagpl 96 25 0 0 1 0 1 1 0 8 0 mbufpl 256 1191 0 0 73 0 73 73 0 8 0 bufpl 280 75044 0 68907 439 0 439 439 0 8 0 anonpl 32 23741 0 0 191 0 191 191 0 246 0 amapchunkpl 152 157981 0 157330 87 51 36 37 0 158 8 amappl16 200 22651 0 22347 183 149 34 50 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 1 0 1 1 1 0 1 0 8 0 amappl13 176 545 0 544 1 0 1 1 0 8 0 amappl12 168 5523 0 5481 3 0 3 3 0 8 0 amappl11 160 11 0 11 2 2 0 1 0 8 0 amappl10 152 50 0 34 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 128 0 124 1 0 1 1 0 8 0 amappl6 120 431 0 417 1 0 1 1 0 8 0 amappl5 112 152 0 141 1 0 1 1 0 8 0 amappl4 104 629 0 598 1 0 1 1 0 8 0 amappl3 96 27695 0 27590 4 1 3 3 0 8 0 amappl2 88 5304 0 5227 3 1 2 3 0 8 0 amappl1 80 35995 0 35400 19 4 15 17 0 8 0 amappl 88 41884 0 41696 5 0 5 5 0 92 0 uvmvnodes 80 255 0 0 6 0 6 6 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 4 0 4 4 4 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 21 0 21 4 4 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 259 0 259 4 4 0 1 0 8 0 dma64 64 9 0 9 2 2 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 97 0 21 2 0 2 2 0 8 0 uaddrrnd 24 4988 0 4957 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4988 0 4957 1 0 1 1 0 8 0 vmmpekpl 168 40248 0 40185 4 0 4 4 0 8 0 vmmpepl 168 330386 0 328124 202 73 129 129 0 357 16 vmsppl 488 4987 0 4957 6 1 5 5 0 8 0 rwobjpl 80 89953 0 88369 62 16 46 46 0 8 4 pdppl 4096 10039 0 9953 166 78 88 92 0 8 2 pvpl 32 30960 0 0 248 0 248 248 0 265 0 pmappl 256 5015 0 4968 4 0 4 4 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 482 0 152 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7277f69f6ad0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,3e) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,3e) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(3e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(3e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8334df1b) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8340c159) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a32a010,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a32a010) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001729000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 end trace frame: 0xffff80002a32a180, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,3e) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,3e) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(3e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(3e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8334df1b) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8340c159) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a32a010,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a32a010) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001729000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtioctl(11e5f,80044403,ffff80002a32a350,81,ffff80003c4402d8) at dtioctl+0x536 sys/dev/dt/dt_dev.c:325 VOP_IOCTL(fffffd8061f14798,80044403,ffff80002a32a350,81,fffffd80097fd750,ffff80003c4402d8) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807bdf98d8,80044403,ffff80002a32a350,ffff80003c4402d8) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c4402d8,ffff80002a32a530,ffff80002a32a480) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a32a530) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a32a530) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf21b6d946f0, count: -20