*cpu0: uvm_fault(0xfffffd806b7c1020, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7c40e261af00, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c44bba0 rbx 0 rdx 0 rcx 0xffff80003c458a98 rax 0x2a r8 0xffff80003c44bad0 r9 0 r10 0x83222550eb26979d r11 0x99f79e28bb5a6340 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff811954c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c44bb20 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=487368 pid=30063 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4582d0,0xffffffff83903b50 process=0xffff80003c41c030 user=0xffff80003c446000, vmspace=0xfffffd806b7c1208 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *30063 487368 80344 0 7 0 syz-executor 35242 185832 95764 0 2 0 syz-executor 35242 354878 95764 0 2 0x4000000 syz-executor 96006 174149 20470 60929 2 0x10 syz-executor 96006 265233 20470 60929 3 0x4000090 fsleep syz-executor 35837 253159 0 0 3 0x14200 acct acct 63463 184719 2607 -1 3 0x90 nanoslp syz-executor 63463 149503 2607 -1 3 0x4000090 fsleep syz-executor 63463 1610 2607 -1 3 0x4000090 kqsel syz-executor 38190 322982 55740 0 3 0x80 nanoslp syz-executor 38190 351896 55740 0 3 0x4000080 sbwait syz-executor 38190 282192 55740 0 3 0x4000080 fsleep syz-executor 38190 231383 55740 0 3 0x4000080 fsleep syz-executor 19148 473896 23838 0 3 0x3000 suspend syz-executor 19148 102704 23838 0 2 0x4081000 syz-executor 19148 337740 23838 0 3 0x4081000 inode syz-executor 9265 381973 15487 0 3 0x82 sbwait sshd-session 63876 493533 0 0 3 0x14200 bored sosplice 66596 243237 0 0 3 0x14280 nfsidl nfsio 75423 77559 0 0 3 0x14280 nfsidl nfsio 9643 475177 0 0 3 0x14280 nfsidl nfsio 2504 445214 0 0 3 0x14280 nfsidl nfsio 92193 380997 0 0 3 0x14280 nfsidl nfsio 62606 504307 0 0 3 0x14280 nfsidl nfsio 22942 255285 0 0 3 0x14280 nfsidl nfsio 70589 503183 0 0 3 0x14280 nfsidl nfsio 87488 164742 0 0 3 0x14280 nfsidl nfsio 65494 435112 0 0 3 0x14280 nfsidl nfsio 86091 263947 0 0 3 0x14280 nfsidl nfsio 23062 75440 0 0 3 0x14280 nfsidl nfsio 29934 5406 0 0 3 0x14280 nfsidl nfsio 38280 427713 0 0 3 0x14280 nfsidl nfsio 91668 241066 0 0 3 0x14280 nfsidl nfsio 9478 518653 0 0 3 0x14280 nfsidl nfsio 28201 274039 0 0 3 0x14280 nfsidl nfsio 76773 218625 0 0 3 0x14280 nfsidl nfsio 48931 36184 0 0 3 0x14280 nfsidl nfsio 80162 269815 0 0 3 0x14280 nfsidl nfsio 55740 347158 91941 0 3 0x82 nanoslp syz-executor 2607 491556 91941 0 3 0x82 nanoslp syz-executor 20470 47921 91941 0 3 0x82 nanoslp syz-executor 95764 513707 91941 0 3 0x82 nanoslp syz-executor 48442 166417 91941 0 2 0x2 syz-executor 55767 307699 91941 0 3 0x82 nanoslp syz-executor 80344 350340 91941 0 3 0x82 nanoslp syz-executor 23838 27854 91941 0 3 0x82 nanoslp syz-executor 91941 523098 75247 0 3 0x82 kqread syz-executor 75247 141178 56958 0 3 0x10008a sigsusp ksh 56958 293298 41442 0 3 0x98 kqread sshd-session 41442 408792 15487 0 3 0x92 kqread sshd-session 90272 160467 1 0 3 0x100083 ttyin getty 15487 18711 1 0 3 0x88 kqread sshd 59869 242062 18037 74 3 0x1100092 bpf pflogd 18037 97103 1 0 3 0x80 sbwait pflogd 7152 77629 12953 73 3 0x1100090 kqread syslogd 12953 365133 1 0 3 0x100082 sbwait syslogd 7666 328791 1 0 3 0x100080 kqread resolvd 60151 163098 70769 77 3 0x100092 kqread dhcpleased 14917 503424 70769 77 3 0x100092 kqread dhcpleased 70769 2276 1 0 3 0x80 kqread dhcpleased 58976 500905 0 0 3 0x14200 bored smr 37791 203143 0 0 3 0x14200 pgzero zerothread 27992 167797 0 0 3 0x14200 aiodoned aiodoned 1761 481255 0 0 3 0x14200 syncer update 33839 70243 0 0 3 0x14200 cleaner cleaner 52625 234737 0 0 3 0x14200 reaper reaper 15457 207634 0 0 3 0x14200 pgdaemon pagedaemon 72965 179555 0 0 3 0x14200 bored viomb 67190 95685 0 0 3 0x40014200 acpi0 acpi0 9913 455520 0 0 3 0x40014200 idle1 11339 296222 0 0 3 0x14200 bored softnet7 42648 124488 0 0 3 0x14200 bored softnet6 58177 231408 0 0 3 0x14200 bored softnet5 81478 353083 0 0 3 0x14200 bored softnet4 96402 494578 0 0 3 0x14200 bored softnet3 66311 315978 0 0 3 0x14200 bored softnet2 92851 95483 0 0 3 0x14200 bored softnet1 56545 90314 0 0 3 0x14200 bored softnet0 72669 90894 0 0 3 0x14200 bored systqmp 10082 495063 0 0 3 0x14200 bored systq 90932 245724 0 0 3 0x14200 tmoslp softclockmp 77260 3083 0 0 3 0x40014200 tmoslp softclock 7307 423506 0 0 3 0x40014200 idle0 1 152758 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b7c0910) #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_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1161 #5 uvm_fault+0x198 sys/uvm/uvm_fault.c:685 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #8 recall_trap+0x8 Process 30063 (syz-executor) thread 0xffff80003c458a98 (487368) exclusive rwlock amaplk r = 0 (0xfffffd806c7e7ba8) #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_fault_check+0x597 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:192 #5 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806b7c1308) #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: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:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b7c0910) #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_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1161 #5 uvm_fault+0x198 sys/uvm/uvm_fault.c:685 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #8 recall_trap+0x8 Process 35242 (syz-executor) thread 0xffff80003c4582d0 (354878) exclusive rrwlock inode r = 0 (0xfffffd8064eea6a8) #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 19148 (syz-executor) thread 0xffff80003c458800 (102704) exclusive rrwlock inode r = 0 (0xfffffd806e1450f8) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10260 11144K 11314K 166960K 12608 0 pcb 18 14K 16K 166960K 211 0 rtable 171 9K 10K 166960K 359 0 pf 38 18K 24K 166960K 107 0 ifaddr 37 6K 8K 166960K 72 0 ifgroup 59 2K 2K 166960K 101 0 sysctl 4 1K 9K 166960K 10 0 counters 70 37K 37K 166960K 146 0 ioctlops 0 0K 4K 166960K 1627 0 iov 0 0K 16K 166960K 64 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1403 88K 88K 166960K 2072 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 62 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 829 0 sigio 0 0K 0K 166960K 12 0 proc 72 115K 196K 166960K 577 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 101 0 in_multi 69 5K 7K 166960K 123 0 ether_multi 1 0K 0K 166960K 5 0 mrt 2 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 452 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 273 169K 182K 166960K 9339 0 UVM aobj 12 2K 2K 166960K 13 0 pinsyscall 45 90K 102K 166960K 1915 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 43 0 NDP 13 0K 2K 166960K 49 0 temp 65 8645K 8711K 166960K 38538 0 kqueue 13 20K 30K 166960K 166 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 120 208 0 205 5 4 1 5 0 8 0 rtentry 176 111 0 50 5 0 5 5 0 8 0 unpcb 144 774 0 720 8 4 4 6 0 8 1 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 202 0 192 5 4 1 4 0 8 0 arp 128 15 0 5 1 0 1 1 0 8 0 inpcb 328 1026 0 1012 13 3 10 10 0 8 8 nd6 144 18 0 8 1 0 1 1 0 8 0 pkpcb 40 9 0 9 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 37 0 37 1 0 1 1 0 8 1 pffrag 232 9 0 1 1 0 1 1 0 482 0 pffrnode 88 8 0 0 1 0 1 1 0 8 0 pffrent 40 14 0 6 1 0 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 0 1 1 0 8 1 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 66 0 17 1 0 1 1 0 8 0 pfstkey 128 68 0 19 2 0 2 2 0 8 0 pfstate 384 67 0 18 6 0 6 6 0 8 1 pfrule 1344 27 0 21 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 481 0 200 28 3 25 28 0 8 2 art_table 40 483 0 200 5 0 5 5 0 8 0 art_node 32 111 0 61 1 0 1 1 0 8 0 sysvmsgpl 40 44 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 59 0 49 1 0 1 1 0 8 0 shmpl 112 10 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2948 0 1438 95 0 95 95 0 8 0 ffsino 296 2948 0 1438 117 0 117 117 0 8 0 nchpl 144 4106 0 2412 64 1 63 64 0 8 0 rtmask 32 12 0 12 1 0 1 1 0 8 1 uvmvnodes 80 3409 0 0 70 0 70 70 0 8 0 vnodes 216 3409 0 0 190 0 190 190 0 8 0 namei 1024 14029 0 14029 2 1 1 2 0 8 1 percpumem 16 88 0 38 1 0 1 1 0 8 0 kstatmem 264 70 0 40 4 1 3 3 0 8 0 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 29315 0 29315 5 4 1 4 1 8 1 plimitpl 152 261 0 240 1 0 1 1 0 8 0 sigapl 424 1151 0 1074 9 0 9 9 0 8 0 knotepl 120 552 0 0 17 0 17 17 0 8 0 kqueuepl 224 258 0 248 3 1 2 2 0 8 1 pipepl 344 187 0 158 5 0 5 5 0 8 2 fdescpl 528 1105 0 1072 3 0 3 3 0 8 0 filepl 160 7341 0 7061 20 5 15 17 0 8 3 lockfpl 104 298 0 296 1 0 1 1 0 8 0 lockfspl 48 133 0 131 1 0 1 1 0 8 0 sessionpl 144 25 0 15 1 0 1 1 0 8 0 pgrppl 48 45 0 27 1 0 1 1 0 8 0 ucredpl 104 1215 0 1199 1 0 1 1 0 8 0 zombiepl 144 1077 0 1074 1 0 1 1 0 8 0 processpl 1248 1151 0 1074 7 0 7 7 0 8 0 procpl 664 2425 0 2339 9 1 8 9 0 8 0 sosppl 168 4 0 4 2 1 1 1 0 8 1 sockpl 752 2034 0 1963 31 18 13 21 0 8 5 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 21 0 0 1 0 1 1 0 8 0 mbufpl 256 1143 0 0 71 0 71 71 0 8 0 bufpl 280 12566 0 6423 440 0 440 440 0 8 0 anonpl 32 11903 0 0 96 0 96 96 0 246 0 amapchunkpl 152 30744 0 30084 42 6 36 36 0 158 9 amappl16 200 4670 0 4436 23 8 15 19 0 8 1 amappl15 192 5 0 5 2 2 0 1 0 8 0 amappl14 184 121 0 108 1 0 1 1 0 8 0 amappl13 176 10 0 9 1 0 1 1 0 8 0 amappl12 168 1753 0 1720 4 1 3 3 0 8 0 amappl11 160 66 0 52 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 255 0 255 1 1 0 1 0 8 0 amappl8 136 47 0 44 1 0 1 1 0 8 0 amappl7 128 107 0 94 1 0 1 1 0 8 0 amappl6 120 188 0 184 1 0 1 1 0 8 0 amappl5 112 127 0 118 1 0 1 1 0 8 0 amappl4 104 309 0 286 1 0 1 1 0 8 0 amappl3 96 5956 0 5833 4 0 4 4 0 8 0 amappl2 88 656 0 588 2 0 2 2 0 8 0 amappl1 80 11778 0 11086 17 1 16 16 0 8 0 amappl 88 8519 0 8323 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 128 254 0 254 2 1 1 1 0 8 1 dma64 64 8 0 8 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 12 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1105 0 1072 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1105 0 1072 1 0 1 1 0 8 0 vmmpekpl 168 10632 0 10590 3 0 3 3 0 8 0 vmmpepl 168 76666 0 74263 108 2 106 108 0 357 0 vmsppl 488 1104 0 1072 5 0 5 5 0 8 0 rwobjpl 80 26472 0 21777 96 0 96 96 0 8 0 pdppl 4096 2218 0 2144 100 26 74 84 0 8 0 pvpl 32 20098 0 0 163 0 163 163 0 265 0 pmappl 256 1104 0 1072 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 336 0 38 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837a8ff0) 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+0x194 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x194 sys/dev/acpi/acpitimer.c:125 comcnputc(800,6b) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(6b) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6b) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 db_printf(ffffffff833fe165) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c438e50) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c438e50) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c438e50) at kerntrap+0x23e sys/arch/amd64/amd64/trap.c:482 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001473000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 end trace frame: 0xffff80003c438f80, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837a8ff0) 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+0x194 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x194 sys/dev/acpi/acpitimer.c:125 comcnputc(800,6b) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(6b) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6b) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 db_printf(ffffffff833fe165) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c438e50) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c438e50) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c438e50) at kerntrap+0x23e sys/arch/amd64/amd64/trap.c:482 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001473000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff8000377fca88) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000377fca88) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c439000) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d1e7db0,81,fffffd80097fb680,ffff8000377fca88) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8064b8de50,ffff8000377fca88) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8064b8de50,ffff8000377fca88) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8064b8de50,ffff8000377fca88) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8064b8de50,ffff8000377fca88) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000377fca88) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000377fca88,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000377fca88,ffff80003c439370,ffff80003c4392c0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c439370) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439370) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77a42536ff90, count: -25 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7c40e261af00, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7c40e261af00, count: -1