*cpu1: uvm_fault(0xfffffd807c224400, 0x0, 0, 1) -> e ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7552f1a51ac0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a421870 rbx 0 rdx 0 rcx 0xffff800031ff7a20 rax 0x3b r8 0xffff80002a4217a0 r9 0 r10 0x52ce5eea70de834d r11 0x67b79dd250770739 r12 0 r13 0 r14 0xffff800031ff7a20 r15 0 rip 0xffffffff81f5b3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a4217f0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=465861 pid=60765 tcnt=2 stat=onproc flags process=10 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800031ff67f8,0xffff80002a322d48 process=0xffff80003b425830 user=0xffff80002a41c000, vmspace=0xfffffd807c224d88 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *60765 465861 59341 0 7 0x10 syz-executor 60765 170727 59341 0 3 0x4000090 fsleep syz-executor 47109 6618 27819 0 2 0 syz-executor 47109 186009 27819 0 3 0x4000080 ttyin syz-executor 53082 407178 69495 0 2 0x4000000 syz-executor 53082 312925 69495 0 3 0x4000080 nanoslp syz-executor 53082 148604 69495 0 3 0x4000080 nanoslp syz-executor 10034 299417 92104 0 3 0x80 nanoslp syz-executor 10034 19102 92104 0 3 0x4000080 rest syz-executor 10034 283325 92104 0 3 0x4000080 fsleep syz-executor 68037 447533 721 0 3 0x82 nanoslp syz-executor 44403 296914 26702 0 3 0x3000 suspend syz-executor 44403 441092 26702 0 3 0x4081000 biowait syz-executor 44403 454665 26702 0 3 0x4081000 inode syz-executor 26702 274354 721 0 3 0x82 nanoslp syz-executor 37299 171748 0 0 3 0x14200 acct acct 92104 492236 721 0 3 0x82 nanoslp syz-executor 59341 440254 721 0 3 0x82 nanoslp syz-executor 3425 445515 721 0 3 0x82 nanoslp syz-executor 17403 306975 0 0 3 0x14200 bored sosplice 13741 255340 721 0 2 0x2 syz-executor 69495 288674 721 0 3 0x82 nanoslp syz-executor 27819 254615 721 0 3 0x82 nanoslp syz-executor 721 229844 33428 0 3 0x82 kqread syz-executor 33428 403242 7336 0 3 0x10008a sigsusp ksh 7336 315363 55487 0 3 0x98 kqread sshd-session 55487 213553 79574 0 3 0x92 kqread sshd-session 90549 406958 1 0 3 0x100083 ttyin getty 79574 332054 1 0 3 0x88 kqread sshd 54097 223898 99874 74 3 0x1100092 bpf pflogd 99874 419976 1 0 3 0x80 sbwait pflogd 40586 217810 55352 73 3 0x1100090 kqread syslogd 55352 80707 1 0 3 0x100082 sbwait syslogd 23579 206186 1 0 3 0x100080 kqread resolvd 59103 173806 38909 77 3 0x100092 kqread dhcpleased 10945 428115 38909 77 3 0x100092 kqread dhcpleased 38909 431973 1 0 3 0x80 kqread dhcpleased 71360 177672 0 0 3 0x14200 bored smr 14764 522268 0 0 2 0x14200 zerothread 13760 40700 0 0 3 0x14200 aiodoned aiodoned 99157 256329 0 0 3 0x14200 syncer update 2634 21238 0 0 3 0x14200 cleaner cleaner 7810 73504 0 0 3 0x14200 reaper reaper 46685 55279 0 0 3 0x14200 pgdaemon pagedaemon 12440 220284 0 0 3 0x14200 bored viomb 48496 60948 0 0 3 0x40014200 acpi0 acpi0 45088 60403 0 0 3 0x40014200 idle1 16873 488399 0 0 3 0x14200 bored softnet7 35219 127937 0 0 3 0x14200 bored softnet6 36053 359284 0 0 3 0x14200 bored softnet5 52015 408918 0 0 3 0x14200 bored softnet4 95235 75750 0 0 3 0x14200 bored softnet3 68130 493422 0 0 3 0x14200 bored softnet2 40259 192722 0 0 3 0x14200 bored softnet1 30460 147726 0 0 3 0x14200 bored softnet0 12135 436642 0 0 3 0x14200 bored systqmp 15738 39393 0 0 3 0x14200 bored systq 5709 394736 0 0 3 0x14200 tmoslp softclockmp 20486 135391 0 0 3 0x40014200 tmoslp softclock 88120 483886 0 0 3 0x40014200 idle0 1 464384 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 (0xfffffd806a92b810) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_write_protect+0x80 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_write_protect+0x80 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_write_protect+0x80 sys/arch/amd64/amd64/pmap.c:2163 #4 uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:476 [inline] #4 uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3191 #5 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 60765 (syz-executor) thread 0xffff800031ff7a20 (465861) exclusive rwlock uobjlk r = 0 (0xfffffd806936fbe0) #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 uvm_map_protect+0xb36 sys/uvm/uvm_map.c:3191 #3 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #5 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd807c224e88) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806a92b810) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_write_protect+0x80 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_write_protect+0x80 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_write_protect+0x80 sys/arch/amd64/amd64/pmap.c:2163 #4 uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:476 [inline] #4 uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3191 #5 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 44403 (syz-executor) thread 0xffff800031ff6030 (441092) exclusive rrwlock inode r = 0 (0xfffffd806f0c2a28) #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+0xa3 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:748 #9 Xsyscall+0x128 Process 13741 (syz-executor) thread 0xffff8000ffff2010 (255340) exclusive rwlock vmmaplk r = 0 (0xfffffd807c2248d0) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3738 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd800b0272e8) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3729 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10269 11164K 12344K 166960K 15532 0 pcb 18 16K 32K 166960K 667 0 rtable 218 13K 13K 166960K 830 0 pf 42 19K 131091K 166960K 627 0 ifaddr 40 8K 9K 166960K 305 0 ifgroup 66 2K 3K 166960K 566 0 sysctl 4 1K 9K 166960K 95 0 counters 72 37K 38K 166960K 884 0 ioctlops 0 0K 8K 166960K 2431 0 iov 0 0K 28K 166960K 275 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1595 100K 100K 166960K 4614 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 40 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 264 0 dirhash 12 2K 2K 166960K 63 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 232K 166960K 3466 0 sigio 0 0K 0K 166960K 115 0 proc 73 115K 164K 166960K 1187 0 subproc 72 4K 4K 166960K 165 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 662 0 in_multi 77 5K 7K 166960K 327 0 ether_multi 1 0K 0K 166960K 26 0 mrt 3 0K 0K 166960K 26 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 271 1208K 1208K 166960K 271 0 exec 0 0K 1K 166960K 1026 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 254 173K 184K 166960K 32928 0 UVM aobj 92 6K 6K 166960K 104 0 pinsyscall 43 86K 100K 166960K 4891 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 210 0 NDP 16 0K 2K 166960K 239 0 temp 84 8652K 8732K 166960K 169560 0 kqueue 13 20K 30K 166960K 621 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 120 365 0 362 2 1 1 2 0 8 0 rtentry 176 297 0 217 5 1 4 5 0 8 0 unpcb 144 2124 0 2101 14 13 1 6 0 8 0 syncache 336 17 0 17 9 8 1 1 0 8 1 tcpqe 32 5 0 5 3 2 1 1 0 8 1 tcpcb 736 1173 0 1165 27 25 2 7 0 8 0 arp 128 40 0 28 1 0 1 1 0 8 0 inpcb 328 3547 0 3533 49 47 2 18 0 8 0 nd6 144 47 0 33 1 0 1 1 0 8 0 pkpcb 40 25 0 25 7 7 0 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 mppekey 1024 65 0 65 1 1 0 1 0 8 0 ppxss 1192 359 0 359 6 6 0 1 0 8 0 pppxif 1504 49 0 49 6 6 0 1 0 8 0 pfstscr 40 8 0 8 3 3 0 1 0 8 0 pffrag 232 24 0 17 1 0 1 1 0 482 0 pffrnode 88 21 0 14 1 0 1 1 0 8 0 pffrent 40 106 0 99 1 0 1 1 0 8 0 pfosfp 40 1431 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1431 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pftag 88 5 0 0 1 0 1 1 0 8 0 pfstitem 24 31 0 17 1 0 1 1 0 8 0 pfstkey 128 52 0 32 1 0 1 1 0 8 0 pfstate 384 38 0 26 2 0 2 2 0 8 0 pfrule 1344 62 0 56 2 1 1 2 0 8 0 rttmr 136 6 0 6 4 4 0 1 0 8 0 art_heap8 4096 6 0 2 4 0 4 4 0 8 0 art_heap4 256 1369 0 1001 38 15 23 28 0 8 0 art_table 40 1375 0 1003 5 0 5 5 0 8 0 art_node 32 293 0 224 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 260 0 250 1 0 1 1 0 8 0 shmpl 112 101 0 12 3 0 3 3 0 8 0 dirhash 1024 51 0 34 3 0 3 3 0 8 0 dino2pl 256 8012 0 6475 97 0 97 97 0 8 0 ffsino 296 8012 0 6475 119 0 119 119 0 8 0 nchpl 144 12831 0 11107 65 0 65 65 0 8 0 rtmask 32 27 0 27 8 8 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 46510 0 46510 8 6 2 2 0 8 2 percpumem 16 457 0 406 1 0 1 1 0 8 0 kstatmem 264 412 0 378 3 0 3 3 0 8 0 scsiplug 72 14 0 14 6 6 0 1 0 8 0 scxspl 216 65674 0 65673 15 14 1 8 1 8 0 plimitpl 152 900 0 881 1 0 1 1 0 8 0 sigapl 424 3771 0 3715 7 0 7 7 0 8 0 knotepl 120 788 0 0 22 0 22 22 0 8 0 kqueuepl 224 1288 0 1279 8 7 1 5 0 8 0 pipepl 344 718 0 690 22 19 3 9 0 8 0 fdescpl 528 3737 0 3705 3 0 3 3 0 8 0 filepl 160 26393 0 26161 45 32 13 19 0 8 1 lockfpl 104 1570 0 1568 2 1 1 2 0 8 0 lockfspl 48 608 0 606 1 0 1 1 0 8 0 sessionpl 144 44 0 35 1 0 1 1 0 8 0 pgrppl 48 160 0 143 1 0 1 1 0 8 0 ucredpl 104 4417 0 4401 1 0 1 1 0 8 0 zombiepl 144 4746 0 4743 2 1 1 1 0 8 0 processpl 1232 3771 0 3715 5 0 5 5 0 8 0 procpl 664 9340 0 9276 9 2 7 7 0 8 0 sosppl 168 20 0 20 7 7 0 1 0 8 0 sockpl 752 6205 0 6165 77 66 11 24 0 8 6 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 45 0 0 5 0 5 5 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 699 0 0 41 0 41 41 0 8 0 bufpl 280 24925 0 18782 440 0 440 440 0 8 0 anonpl 32 16239 0 0 132 1 131 131 0 246 0 amapchunkpl 152 114358 0 113676 72 43 29 38 0 158 0 amappl16 200 9818 0 9621 67 54 13 30 0 8 0 amappl15 192 7 0 7 2 2 0 1 0 8 0 amappl14 184 159 0 147 1 0 1 1 0 8 0 amappl13 176 11 0 11 2 2 0 1 0 8 0 amappl12 168 4573 0 4542 4 2 2 3 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 4 0 3 2 1 1 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 159 0 146 1 0 1 1 0 8 0 amappl6 120 293 0 289 1 0 1 1 0 8 0 amappl5 112 173 0 162 1 0 1 1 0 8 0 amappl4 104 369 0 348 1 0 1 1 0 8 0 amappl3 96 23619 0 23507 5 1 4 4 0 8 0 amappl2 88 905 0 840 2 0 2 2 0 8 0 amappl1 80 25085 0 24486 16 1 15 15 0 8 0 amappl 88 31439 0 31261 5 0 5 5 0 92 0 dma65536 65536 3 0 3 2 2 0 1 0 8 0 dma32768 32768 2 0 2 2 1 1 1 0 8 1 dma4096 4096 4 0 4 3 3 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 9 0 9 2 2 0 1 0 8 0 dma128 128 256 0 256 4 4 0 1 0 8 0 dma64 64 11 0 11 6 6 0 1 0 8 0 dma32 32 9 0 9 3 3 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 103 0 12 2 0 2 2 0 8 0 uaddrrnd 24 3737 0 3705 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3737 0 3705 1 0 1 1 0 8 0 vmmpekpl 168 30163 0 30106 4 0 4 4 0 8 0 vmmpepl 168 236996 0 234768 142 39 103 115 0 357 0 vmsppl 488 3736 0 3705 7 2 5 5 0 8 0 rwobjpl 80 64900 0 57766 152 3 149 150 0 8 0 pdppl 4096 7482 0 7410 126 52 74 84 0 8 2 pvpl 32 27072 0 0 218 0 218 218 0 265 0 pmappl 256 3736 0 3705 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 392 0 115 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7552f1a51ac0, 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:654 comcnputc(800,20) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 kputchar(20,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 printf(ffffffff8333317b) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80003b82d6e0,6) at trap_print+0xd8 sys/arch/amd64/amd64/trap.c:633 kerntrap(ffff80003b82d6e0) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:487 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000016a3000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff800031ff7cb8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800031ff7cb8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 end trace frame: 0xffff80003b82d880, 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:654 comcnputc(800,20) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 kputchar(20,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 printf(ffffffff8333317b) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80003b82d6e0,6) at trap_print+0xd8 sys/arch/amd64/amd64/trap.c:633 kerntrap(ffff80003b82d6e0) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:487 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000016a3000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff800031ff7cb8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800031ff7cb8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003b82d890) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806ea45510,81,fffffd80097fb548,ffff800031ff7cb8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806ba4b490,ffff800031ff7cb8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806ba4b490,ffff800031ff7cb8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806ba4b490,ffff800031ff7cb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806ba4b490,ffff800031ff7cb8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800031ff7cb8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800031ff7cb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800031ff7cb8,ffff80003b82dc00,ffff80003b82db50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003b82dc00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b82dc00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72debf8afd10, count: -24