*cpu1: uvm_fault(0xfffffd806a598988, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xc8e8f9eed40, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c4a9010 rbx 0 rdx 0 rcx 0xffff80003c47b9d8 rax 0x2a r8 0xffff80003c4a8f40 r9 0 r10 0x2536401fcbbea6ef r11 0x2fbfe7abf74ea19c r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82beb4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c4a8f90 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=436276 pid=90500 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=75, usrpri=75, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c47a7e8,0xffffffff839e06a0 process=0xffff80003c4dc4e0 user=0xffff80003c4a4000, vmspace=0xfffffd806a5987a8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90500 417991 58065 0 2 0 syz-executor 90500 327754 58065 0 3 0x4000080 fsleep syz-executor *90500 436276 58065 0 7 0x4000000 syz-executor 63463 485953 90853 0 2 0 syz-executor 90079 272945 31769 0 2 0 syz-executor 90079 349757 31769 0 3 0x4000080 fsleep syz-executor 22744 136791 0 0 3 0x14200 acct acct 60667 14676 0 0 3 0x14280 nfsidl nfsio 67981 113694 0 0 3 0x14280 nfsidl nfsio 43347 347718 0 0 3 0x14280 nfsidl nfsio 93098 182518 0 0 3 0x14280 nfsidl nfsio 67786 499016 0 0 3 0x14280 nfsidl nfsio 82637 323672 0 0 3 0x14280 nfsidl nfsio 94054 190462 0 0 3 0x14280 nfsidl nfsio 70538 237510 0 0 3 0x14280 nfsidl nfsio 88853 504353 0 0 3 0x14280 nfsidl nfsio 3407 260085 0 0 3 0x14280 nfsidl nfsio 93083 339037 0 0 3 0x14280 nfsidl nfsio 89564 101413 0 0 3 0x14280 nfsidl nfsio 90259 522293 0 0 3 0x14280 nfsidl nfsio 15441 154418 0 0 3 0x14280 nfsidl nfsio 72142 491334 0 0 3 0x14280 nfsidl nfsio 34779 282650 0 0 3 0x14280 nfsidl nfsio 31190 216876 0 0 3 0x14280 nfsidl nfsio 69873 91350 0 0 3 0x14280 nfsidl nfsio 40855 208047 0 0 3 0x14280 nfsidl nfsio 82870 262866 0 0 3 0x14280 nfsidl nfsio 45381 129409 35878 0 3 0x82 wait syz-executor 91252 413114 0 0 3 0x14200 bored sosplice 31769 368670 35878 0 3 0x82 nanoslp syz-executor 46196 412452 35878 0 2 0x2 syz-executor 28546 353015 35878 0 3 0x82 nanoslp syz-executor 90853 85071 35878 0 3 0x82 nanoslp syz-executor 99983 392233 35878 0 2 0x2 syz-executor 53936 95803 35878 0 3 0x2 biowait syz-executor 58065 330674 35878 0 3 0x82 nanoslp syz-executor 35878 372149 84327 0 3 0x82 kqread syz-executor 84327 195658 96712 0 3 0x10008a sigsusp ksh 96712 508822 53507 0 3 0x98 kqread sshd-session 53507 269203 55799 0 3 0x92 kqread sshd-session 56538 107179 1 0 3 0x100083 ttyin getty 55799 294011 1 0 3 0x88 kqread sshd 3210 48977 13732 74 3 0x1100092 bpf pflogd 13732 401736 1 0 3 0x80 sbwait pflogd 38057 169215 50181 73 3 0x1100090 kqread syslogd 50181 138743 1 0 3 0x100082 sbwait syslogd 69049 31180 1 0 3 0x100080 kqread resolvd 2014 391885 52884 77 3 0x100092 kqread dhcpleased 16054 332999 52884 77 3 0x100092 kqread dhcpleased 52884 39162 1 0 3 0x80 kqread dhcpleased 88758 224006 0 0 3 0x14200 bored smr 13339 112309 0 0 2 0x14200 zerothread 62636 302732 0 0 3 0x14200 aiodoned aiodoned 95065 316752 0 0 3 0x14200 syncer update 47445 60230 0 0 3 0x14200 cleaner cleaner 94046 239049 0 0 3 0x14200 reaper reaper 78549 190284 0 0 3 0x14200 pgdaemon pagedaemon 93440 492059 0 0 3 0x14200 bored viomb 905 196491 0 0 3 0x40014200 acpi0 acpi0 74132 16219 0 0 3 0x40014200 idle1 91318 97459 0 0 3 0x14200 bored softnet3 40213 524086 0 0 3 0x14200 bored softnet2 22105 338640 0 0 3 0x14200 bored softnet1 55817 64681 0 0 3 0x14200 bored softnet0 6429 214907 0 0 3 0x14200 bored systqmp 93964 97633 0 0 3 0x14200 bored systq 24696 474829 0 0 3 0x14200 tmoslp softclockmp 57253 288405 0 0 3 0x40014200 tmoslp softclock 67256 488004 0 0 3 0x40014200 idle0 1 142361 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 (0xfffffd806bd3ab10) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_lower+0x60a sys/uvm/uvm_fault.c:1542 #5 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 90500 (syz-executor) thread 0xffff80003c47b9d8 (436276) exclusive rwlock amaplk r = 0 (0xfffffd806ad29408) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 uvm_fault_check+0x5a9 sys/uvm/uvm_fault.c:862 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806a5988a8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1924 #3 uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806bd3ab10) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_lower+0x60a sys/uvm/uvm_fault.c:1542 #5 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 53936 (syz-executor) thread 0xffff80002a28e2a8 (95803) exclusive rrwlock inode r = 0 (0xfffffd806df81300) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #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:3109 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cd22af0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #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:3094 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 11144K 11366K 166960K 12416 0 pcb 17 14K 16K 166960K 187 0 rtable 131 7K 10K 166960K 484 0 pf 30 16K 21K 166960K 103 0 ifaddr 27 4K 7K 166960K 74 0 ifgroup 47 2K 2K 166960K 121 0 sysctl 3 1K 1K 166960K 5 0 counters 62 36K 37K 166960K 114 0 ioctlops 0 0K 4K 166960K 1630 0 iov 0 0K 14K 166960K 33 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1466 92K 93K 166960K 2181 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 23 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 89K 166960K 742 0 sigio 0 0K 0K 166960K 5 0 proc 72 91K 128K 166960K 626 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 151 0 in_multi 45 3K 7K 166960K 141 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 494 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 226 144K 158K 166960K 8549 0 UVM aobj 15 4K 4K 166960K 16 0 pinsyscall 40 80K 103K 166960K 1859 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 40 0 NDP 10 0K 2K 166960K 49 0 temp 57 8658K 8726K 166960K 26799 0 kqueue 13 20K 28K 166960K 119 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 153 0 150 3 2 1 2 0 8 0 rtentry 176 143 0 90 6 0 6 6 0 8 0 unpcb 144 524 0 507 5 3 2 4 0 8 1 syncache 336 6 0 6 1 1 0 1 0 8 0 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 808 159 0 151 4 2 2 2 0 8 1 arp 128 23 0 14 1 0 1 1 0 8 0 inpcb 384 720 0 707 13 9 4 8 0 8 2 nd6 144 30 0 17 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 2 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 1 1 1 0 8 1 ppxss 1192 12 0 12 3 2 1 1 0 8 1 pppxif 1504 6 0 6 2 1 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 1 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 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 52 0 22 1 0 1 1 0 8 0 pfstkey 128 52 0 22 2 0 2 2 0 8 0 pfstate 384 52 0 22 4 0 4 4 0 8 0 pfrule 1344 25 0 20 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 539 0 330 29 5 24 29 0 8 4 art_table 32 541 0 330 4 0 4 4 0 8 0 art_node 16 137 0 93 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 6 1 0 1 1 0 8 0 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 13 0 1 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 2910 0 1413 95 0 95 95 0 8 0 ffsino 288 2910 0 1413 109 0 109 109 0 8 0 nchpl 144 3918 0 2235 63 0 63 63 0 8 0 uvmvnodes 80 3430 0 0 70 0 70 70 0 8 0 vnodes 216 3430 0 0 191 0 191 191 0 8 0 namei 1024 13491 0 13490 3 2 1 2 0 8 0 percpumem 16 72 0 26 1 0 1 1 0 8 0 kstatmem 264 64 0 40 4 1 3 3 0 8 1 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 11641 0 11640 10 9 1 8 1 8 0 plimitpl 152 156 0 139 1 0 1 1 0 8 0 sigapl 424 1067 0 998 10 1 9 9 0 8 0 knotepl 120 531 0 0 17 1 16 17 0 8 0 kqueuepl 224 300 0 289 7 2 5 5 0 8 4 pipepl 336 238 0 209 8 5 3 8 0 8 0 fdescpl 520 1023 0 994 3 0 3 3 0 8 0 filepl 160 6468 0 6243 32 13 19 23 0 8 8 lockfpl 104 250 0 248 1 0 1 1 0 8 0 lockfspl 48 76 0 74 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 40 0 23 1 0 1 1 0 8 0 ucredpl 104 1026 0 1012 1 0 1 1 0 8 0 zombiepl 144 1190 0 1188 2 1 1 1 0 8 0 processpl 1208 1067 0 998 6 0 6 6 0 8 0 procpl 656 2139 0 2067 8 0 8 8 0 8 0 srpgc 96 11 0 11 4 4 0 1 0 8 0 sosppl 168 4 0 4 2 2 0 1 0 8 0 sockpl 728 1407 0 1374 19 11 8 10 0 8 4 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 33 0 0 5 1 4 5 0 8 0 mtagpl 96 75 0 0 2 0 2 2 0 8 0 mbufpl 256 271 0 0 17 0 17 17 0 8 0 bufpl 280 3525 0 125 243 0 243 243 0 8 0 anonpl 32 8746 0 0 71 0 71 71 0 246 0 amapchunkpl 152 27669 0 27179 36 7 29 29 0 158 6 amappl16 200 2827 0 2791 15 11 4 12 0 8 0 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 115 0 103 1 0 1 1 0 8 0 amappl13 176 9 0 9 2 2 0 1 0 8 0 amappl12 168 1680 0 1652 4 1 3 3 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 256 0 255 1 0 1 1 0 8 0 amappl8 136 24 0 20 1 0 1 1 0 8 0 amappl7 128 114 0 102 1 0 1 1 0 8 0 amappl6 120 192 0 188 1 0 1 1 0 8 0 amappl5 112 170 0 161 1 0 1 1 0 8 0 amappl4 104 325 0 303 1 0 1 1 0 8 0 amappl3 96 5343 0 5250 5 1 4 4 0 8 0 amappl2 88 662 0 600 2 0 2 2 0 8 0 amappl1 80 11022 0 10431 15 0 15 15 0 8 0 amappl 88 7713 0 7559 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 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 15 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1023 0 994 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1023 0 994 1 0 1 1 0 8 0 vmmpekpl 168 10108 0 10058 3 0 3 3 0 8 0 vmmpepl 168 69664 0 67790 105 12 93 99 0 357 3 vmsppl 480 1022 0 994 6 1 5 5 0 8 0 rwobjpl 72 23575 0 19213 80 0 80 80 0 8 0 pdppl 4096 2053 0 1988 103 32 71 83 0 8 6 pvpl 32 14852 0 0 120 0 120 120 0 265 0 pmappl 256 1022 0 994 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 407 0 51 11 0 11 11 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: 0xc8e8f9eed40, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,3e) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(3e) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(3e) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833ff523) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a3b5a) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80003c429800,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80003c429800) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c4298e0, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,3e) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(3e) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(3e) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833ff523) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a3b5a) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80003c429800,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80003c429800) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001481000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,1,2000,ffff8000ffff1730) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff8000ffff1730) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c4299b0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806520aa60,1,fffffd807f7d33a8,ffff8000ffff1730) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bd3f4a0,ffff8000ffff1730) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bd3f4a0,ffff8000ffff1730) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806bd3f4a0,ffff8000ffff1730) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd806bd3f4a0,ffff8000ffff1730) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff8000ffff1730) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff8000ffff1730,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff1730,ffff80003c429d20,ffff80003c429c70) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c429d20) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c429d20) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76f0e0605800, count: -26