*cpu1: uvm_fault(0xfffffd806c9977b8, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x751cca6f3840, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a3bc620 rbx 0 rdx 0 rcx 0xffff800031fcc2b8 rax 0x2a r8 0xffff80002a3bc550 r9 0 r10 0x61365b1fd068eaee r11 0x77f4b7ce7951b8e4 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff811054c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a3bc5a0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=336182 pid=2383 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=0xffff800031fcc020,0xffffffff83975070 process=0xffff8000fffeb510 user=0xffff80002a3b7000, vmspace=0xfffffd806c8665d8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 2383 336182 79509 0 7 0 syz-executor 7693 6802 40686 0 2 0 syz-executor 68998 474930 35070 0 2 0 syz-executor 68998 327752 35070 0 3 0x4000080 fsleep syz-executor 68998 382907 35070 0 3 0x4000080 fsleep syz-executor 67463 118476 10032 0 3 0x80 nanoslp syz-executor 67463 77273 10032 0 3 0x4000080 kqread syz-executor 67463 231943 10032 0 3 0x4000080 fsleep syz-executor 83578 156491 60542 0 3 0x80 nanoslp syz-executor 83578 234439 60542 0 3 0x4000080 ttyout syz-executor 83578 422088 60542 0 3 0x4000080 fsleep syz-executor 40686 403506 41970 0 3 0x82 nanoslp syz-executor 60542 162749 41970 0 3 0x82 nanoslp syz-executor 64334 223782 1 0 3 0x100083 ttyin getty 27800 300653 0 0 3 0x14280 nfsidl nfsio 36678 101359 0 0 3 0x14280 nfsidl nfsio 29514 498037 0 0 3 0x14280 nfsidl nfsio 47153 286525 0 0 3 0x14280 nfsidl nfsio 69966 409377 0 0 3 0x14280 nfsidl nfsio 24216 170753 0 0 3 0x14280 nfsidl nfsio 24949 150362 0 0 3 0x14280 nfsidl nfsio 66919 288198 0 0 3 0x14280 nfsidl nfsio 22788 477273 0 0 3 0x14280 nfsidl nfsio 15661 513716 0 0 3 0x14280 nfsidl nfsio 82095 126460 0 0 3 0x14280 nfsidl nfsio 41963 264455 0 0 3 0x14280 nfsidl nfsio 61125 74646 0 0 3 0x14280 nfsidl nfsio 71198 48223 0 0 3 0x14280 nfsidl nfsio 51565 295836 0 0 3 0x14280 nfsidl nfsio 58390 70589 0 0 3 0x14280 nfsidl nfsio 82554 485887 0 0 3 0x14280 nfsidl nfsio 16889 100420 0 0 3 0x14280 nfsidl nfsio 51324 156454 0 0 3 0x14280 nfsidl nfsio 17989 501136 0 0 3 0x14280 nfsidl nfsio 35070 24443 41970 0 2 0x2 syz-executor 79509 50792 41970 0 3 0x82 nanoslp syz-executor 27543 131635 67310 0 3 0x100082 sbwait ndp 67310 402669 1 0 3 0x10008a sigsusp sh 77903 266715 41970 0 3 0x82 nanoslp syz-executor 52599 472925 41970 0 3 0x82 nanoslp syz-executor 17553 51480 41970 0 3 0x2 biowait syz-executor 10032 402628 41970 0 3 0x82 nanoslp syz-executor 41970 166340 95730 0 2 0x2 syz-executor 95730 10911 648 0 3 0x10008a sigsusp ksh 648 24467 77930 0 3 0x98 kqread sshd-session 77930 212421 95327 0 3 0x92 kqread sshd-session 95327 72043 1 0 3 0x88 kqread sshd 6508 160395 60433 74 3 0x1100092 bpf pflogd 60433 61079 1 0 3 0x80 sbwait pflogd 90697 210182 53430 73 3 0x1100090 kqread syslogd 53430 307094 1 0 3 0x100082 sbwait syslogd 94648 267281 1 0 3 0x100080 kqread resolvd 90733 431355 95122 77 3 0x100092 kqread dhcpleased 14819 430890 95122 77 3 0x100092 kqread dhcpleased 95122 447194 1 0 3 0x80 kqread dhcpleased 52335 351770 0 0 3 0x14200 bored smr 37908 137724 0 0 3 0x14200 pgzero zerothread 48745 336771 0 0 3 0x14200 aiodoned aiodoned 14144 60023 0 0 3 0x14200 syncer update 54789 193525 0 0 3 0x14200 cleaner cleaner 81620 55303 0 0 3 0x14200 reaper reaper 44407 393189 0 0 3 0x14200 pgdaemon pagedaemon 15421 468576 0 0 3 0x14200 bored viomb 96984 211843 0 0 3 0x40014200 acpi0 acpi0 49884 261968 0 0 3 0x40014200 idle1 36248 284125 0 0 3 0x14200 bored softnet1 39126 176831 0 0 3 0x14200 bored softnet0 64079 196928 0 0 3 0x14200 smrbar systqmp 10660 212930 0 0 3 0x14200 bored systq 94067 177734 0 0 3 0x14200 tmoslp softclockmp 75713 140874 0 0 3 0x40014200 tmoslp softclock 73575 282845 0 0 3 0x40014200 idle0 1 398056 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 (0xfffffd806c7ff710) #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+0x5d6 sys/uvm/uvm_fault.c:1504 #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 Process 2383 (syz-executor) thread 0xffff800031fcc2b8 (336182) exclusive rwlock amaplk r = 0 (0xfffffd805bcec5c0) #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_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806c8666d8) #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 (0xfffffd806c7ff710) #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+0x5d6 sys/uvm/uvm_fault.c:1504 #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 Process 17553 (syz-executor) thread 0xffff8000ffffc2a0 (51480) exclusive rrwlock inode r = 0 (0xfffffd806c570b48) #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 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:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cf9d698) #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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 64079 (systqmp) thread 0xffff8000ffffe000 (196928) shared rwlock systqmp r = 0 (0xffffffff83820298) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11103 12220K 14110K 166960K 15282 0 pcb 17 15K 22K 166960K 947 0 rtable 216 14K 15K 166960K 881 0 pf 37 18K 83K 166960K 524 0 ifaddr 36 7K 9K 166960K 182 0 ifgroup 46 2K 3K 166960K 309 0 sysctl 4 1K 9K 166960K 29 0 counters 64 36K 38K 166960K 352 0 ioctlops 0 0K 4K 166960K 2258 0 iov 0 0K 24K 166960K 191 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1550 97K 98K 166960K 3864 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 34 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 24 0 dirhash 12 2K 2K 166960K 60 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 244K 166960K 2642 0 sigio 0 0K 0K 166960K 46 0 proc 73 115K 180K 166960K 826 0 subproc 81 5K 5K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 395 0 in_multi 74 5K 7K 166960K 274 0 ether_multi 1 0K 0K 166960K 21 0 mrt 2 0K 0K 166960K 23 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 906 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 260 163K 177K 166960K 25034 0 UVM aobj 136 16K 17K 166960K 149 0 pinsyscall 45 90K 104K 166960K 3898 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 180 0 NDP 9 0K 2K 166960K 125 0 temp 80 8688K 8944K 166960K 143045 0 kqueue 15 24K 31K 166960K 802 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 120 276 0 271 2 1 1 2 0 8 0 rtentry 176 244 0 168 6 0 6 6 0 8 0 unpcb 144 1704 0 1685 21 19 2 6 0 8 1 syncache 336 12 0 12 5 5 0 1 0 8 0 tcpqe 32 47 0 47 6 6 0 1 0 8 0 tcpcb 736 1116 0 1110 29 22 7 7 0 8 6 arp 136 39 0 25 1 0 1 1 0 8 0 inpcb 328 3447 0 3436 42 35 7 7 0 8 5 nd6 152 47 0 27 2 0 2 2 0 8 0 pkpcb 40 18 0 18 8 7 1 1 0 8 1 kcovpl 48 12 0 3 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 1 1 1 0 8 1 ppxss 1192 111 0 111 6 5 1 1 0 8 1 pppxif 1504 14 0 14 7 7 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 17 0 12 1 0 1 1 0 482 0 pffrnode 88 16 0 11 1 0 1 1 0 8 0 pffrent 40 29 0 24 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 37 0 32 2 1 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 5 0 3 3 2 1 1 0 8 0 pfstate 448 3 0 2 3 2 1 1 0 8 0 pfrule 1360 78 0 8 6 0 6 6 0 8 0 rttmr 136 5 0 5 4 4 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1153 0 816 41 15 26 31 0 8 2 art_table 40 1158 0 816 5 0 5 5 0 8 0 art_node 32 244 0 174 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 22 0 12 1 0 1 1 0 8 0 shmpl 112 135 0 7 4 0 4 4 0 8 0 dirhash 1024 49 0 32 3 0 3 3 0 8 0 dino2pl 256 6433 0 4930 95 0 95 95 0 8 0 ffsino 296 6433 0 4930 117 0 117 117 0 8 0 nchpl 144 9997 0 8284 64 0 64 64 0 8 0 rtmask 32 28 0 28 6 5 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 34478 0 34477 6 4 2 2 0 8 1 percpumem 16 191 0 144 1 0 1 1 0 8 0 vcpupl 3968 6 0 1 1 0 1 1 0 8 0 vmpool 848 10 0 5 1 0 1 1 0 8 0 pfiaddrpl 120 62 0 0 2 0 2 2 0 8 0 kstatmem 264 196 0 176 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 18 0 18 6 6 0 1 0 8 0 scxspl 216 100513 0 100512 17 15 2 8 1 8 1 plimitpl 152 858 0 838 1 0 1 1 0 8 0 sigapl 424 2961 0 2892 9 1 8 9 0 8 0 knotepl 120 756 0 0 21 0 21 21 0 8 0 kqueuepl 224 1223 0 1211 15 12 3 5 0 8 2 pipepl 344 343 0 311 7 3 4 4 0 8 0 fdescpl 528 2916 0 2883 3 0 3 3 0 8 0 filepl 160 19891 0 19646 45 31 14 21 0 8 2 lockfpl 104 920 0 918 2 1 1 2 0 8 0 lockfspl 48 301 0 299 1 0 1 1 0 8 0 sessionpl 144 36 0 27 1 0 1 1 0 8 0 pgrppl 48 79 0 61 1 0 1 1 0 8 0 ucredpl 104 3608 0 3594 1 0 1 1 0 8 0 zombiepl 144 3406 0 3404 2 1 1 1 0 8 0 processpl 1232 2961 0 2892 6 0 6 6 0 8 0 procpl 664 6985 0 6910 9 1 8 8 0 8 0 sosppl 176 23 0 23 7 6 1 1 0 8 1 sockpl 752 5557 0 5522 78 67 11 24 0 8 6 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 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 111 0 0 14 0 14 14 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 33 0 0 4 0 4 4 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 1186 0 0 72 0 72 72 0 8 0 bufpl 280 43604 0 37468 439 0 439 439 0 8 0 anonpl 32 15950 0 0 129 0 129 129 0 246 0 amapchunkpl 152 86406 0 85867 71 41 30 31 0 158 3 amappl16 200 14030 0 13994 130 107 23 42 0 8 9 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 6 0 5 3 2 1 1 0 8 0 amappl13 176 472 0 470 1 0 1 1 0 8 0 amappl12 168 3329 0 3284 3 0 3 3 0 8 0 amappl11 160 3 0 3 2 2 0 1 0 8 0 amappl10 152 52 0 38 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 38 0 35 1 0 1 1 0 8 0 amappl7 128 122 0 119 1 0 1 1 0 8 0 amappl6 120 338 0 323 1 0 1 1 0 8 0 amappl5 112 85 0 74 1 0 1 1 0 8 0 amappl4 104 488 0 456 1 0 1 1 0 8 0 amappl3 96 15465 0 15370 4 1 3 3 0 8 0 amappl2 88 3101 0 3020 2 0 2 2 0 8 0 amappl1 80 22260 0 21641 15 0 15 15 0 8 0 amappl 88 23814 0 23638 5 0 5 5 0 92 0 uvmvnodes 80 185 0 1 4 0 4 4 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 8 0 8 3 2 1 1 0 8 1 dma128 128 258 0 258 5 5 0 1 0 8 0 dma64 64 10 0 10 3 3 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 72 148 0 13 3 0 3 3 0 8 0 uaddrrnd 24 2916 0 2883 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2916 0 2883 1 0 1 1 0 8 0 vmmpekpl 168 23175 0 23126 3 0 3 3 0 8 0 vmmpepl 168 193629 0 191629 182 64 118 121 0 357 12 vmsppl 488 2915 0 2883 5 0 5 5 0 8 0 rwobjpl 80 53535 0 52233 49 9 40 40 0 8 3 pdppl 4096 5860 0 5781 139 56 83 88 0 8 4 pvpl 32 25098 0 0 203 1 202 202 0 265 0 pmappl 256 2925 0 2888 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 438 0 110 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: 0x751cca6f3840, 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(800,20) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0xd0 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(30) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83351bf6) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83414406) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003e899750,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003e899750) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000178a000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 end trace frame: 0xffff80003e899880, 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(800,20) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0xd0 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(30) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83351bf6) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83414406) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003e899750,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003e899750) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000178a000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c471a30) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c471a30) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003e899900) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805927d988,81,fffffd80097fd410,ffff80003c471a30) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805c6f6de0,ffff80003c471a30) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805c6f6de0,ffff80003c471a30) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805c6f6de0,ffff80003c471a30) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805c6f6de0,ffff80003c471a30) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c471a30) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c471a30,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c471a30,ffff80003e899c70,ffff80003e899bc0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003e899c70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003e899c70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fe1418957e0, count: -25