*cpu1: uvm_fault(0xfffffd806b787d78, 0x0, 0, 1) -> e ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7b613db1a010, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c4bd440 rbx 0 rdx 0 rcx 0xffff80003c4a07f8 rax 0x3b r8 0xffff80003c4bd370 r9 0 r10 0x440ffad419edf31b r11 0xb2252bdcb41a91c0 r12 0 r13 0 r14 0xffff80003c4a07f8 r15 0 rip 0xffffffff8128c3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c4bd3c0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=304993 pid=69740 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4a1a20,0xffff80003b808a90 process=0xffff80003c5dc9d0 user=0xffff80003c4b8000, vmspace=0xfffffd806b7879a8 estcpu=36, cpticks=3, pctcpu=0.0, user=1, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *69740 304993 7980 0 7 0 syz-executor 69740 101186 7980 0 3 0x4000080 fsleep syz-executor 27344 239272 69449 0 2 0 syz-executor 27344 503231 69449 0 3 0x4000080 ttyout syz-executor 27344 409610 69449 0 3 0x4000080 fsleep syz-executor 61555 354831 59078 0 3 0x80 nanoslp syz-executor 61555 81525 59078 0 3 0x4000080 kqread syz-executor 61555 256222 59078 0 3 0x4000000 smrbar syz-executor 61555 196634 59078 0 3 0x4000080 fsleep syz-executor 84058 75575 62904 0 3 0x80 nanoslp syz-executor 84058 129609 62904 0 3 0x4000080 ttyopn syz-executor 84058 330548 62904 0 3 0x4000080 fsleep syz-executor 84058 234548 62904 0 3 0x4000080 fsleep syz-executor 47375 126930 24778 0 3 0x80 nanoslp syz-executor 47375 51938 24778 0 3 0x4000080 kqsel syz-executor 47375 15511 24778 0 3 0x4000080 fsleep syz-executor 94915 209827 63389 0 3 0x3000 suspend syz-executor 94915 72187 63389 0 3 0x4081000 biowait syz-executor 94915 46685 63389 0 3 0x4081000 fltagain2 syz-executor 36951 79834 0 0 3 0x14280 nfsidl nfsio 23930 254179 0 0 3 0x14280 nfsidl nfsio 50992 416130 0 0 3 0x14280 nfsidl nfsio 45762 155706 0 0 3 0x14280 nfsidl nfsio 73092 301971 0 0 3 0x14280 nfsidl nfsio 19139 87980 0 0 3 0x14280 nfsidl nfsio 81104 512659 0 0 3 0x14280 nfsidl nfsio 6474 468179 0 0 3 0x14280 nfsidl nfsio 64290 357052 0 0 3 0x14280 nfsidl nfsio 40945 506595 0 0 3 0x14280 nfsidl nfsio 39895 357929 0 0 3 0x14280 nfsidl nfsio 85246 429852 0 0 3 0x14280 nfsidl nfsio 37969 475290 0 0 3 0x14280 nfsidl nfsio 29198 498087 0 0 3 0x14280 nfsidl nfsio 4764 124497 0 0 3 0x14280 nfsidl nfsio 93030 55335 0 0 3 0x14280 nfsidl nfsio 88748 499722 0 0 3 0x14280 nfsidl nfsio 60485 159697 0 0 3 0x14280 nfsidl nfsio 27383 231761 0 0 3 0x14280 nfsidl nfsio 99319 424328 0 0 3 0x14280 nfsidl nfsio 5037 21039 1 0 3 0x100083 ttyin getty 63389 201371 30480 0 3 0x82 nanoslp syz-executor 69144 489617 0 0 3 0x14200 bored sosplice 69449 382961 30480 0 3 0x82 nanoslp syz-executor 62904 290958 30480 0 3 0x82 nanoslp syz-executor 38243 497937 30480 0 3 0x2 biowait syz-executor 7980 476478 30480 0 3 0x82 nanoslp syz-executor 24778 239679 30480 0 3 0x82 nanoslp syz-executor 59078 404279 30480 0 3 0x82 nanoslp syz-executor 37940 153488 30480 0 3 0x82 nanoslp syz-executor 30480 467336 28501 0 3 0x82 kqread syz-executor 28501 34442 91310 0 3 0x10008a sigsusp ksh 91310 271313 43927 0 3 0x98 kqread sshd-session 43927 396191 25937 0 3 0x92 kqread sshd-session 25937 4138 1 0 3 0x88 kqread sshd 91379 7167 6832 74 3 0x1100092 bpf pflogd 6832 356681 1 0 3 0x80 sbwait pflogd 52727 267085 30674 73 3 0x1100090 kqread syslogd 30674 520565 1 0 3 0x100082 sbwait syslogd 78699 338322 1 0 3 0x100080 kqread resolvd 25187 242153 96141 77 3 0x100092 kqread dhcpleased 72294 104313 96141 77 3 0x100092 kqread dhcpleased 96141 124878 1 0 3 0x80 kqread dhcpleased 43790 379237 0 0 3 0x14200 bored smr 69355 137351 0 0 2 0x14200 zerothread 41985 422620 0 0 3 0x14200 aiodoned aiodoned 43289 237274 0 0 3 0x14200 syncer update 37291 42564 0 0 3 0x14200 cleaner cleaner 8524 362748 0 0 3 0x14200 reaper reaper 52680 87436 0 0 3 0x14200 pgdaemon pagedaemon 4823 440538 0 0 3 0x14200 bored viomb 59951 498278 0 0 3 0x40014200 acpi0 acpi0 29371 103202 0 0 3 0x40014200 idle1 2132 474870 0 0 3 0x14200 bored softnet1 70351 521719 0 0 3 0x14200 bored softnet0 52718 63897 0 0 3 0x14200 bored systqmp 2324 188629 0 0 3 0x14200 bored systq 73743 372654 0 0 3 0x14200 tmoslp softclockmp 53506 205589 0 0 3 0x40014200 tmoslp softclock 4334 262167 0 0 3 0x40014200 idle0 1 446240 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 69740 (syz-executor) thread 0xffff80003c4a07f8 (304993) exclusive rwlock uobjlk r = 0 (0xfffffd80727abd60) #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:746 #5 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd806b787aa8) #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:746 #6 Xsyscall+0x128 Process 94915 (syz-executor) thread 0xffff80003c444aa8 (72187) exclusive rrwlock inode r = 0 (0xfffffd806e3c9488) #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:746 #9 Xsyscall+0x128 Process 38243 (syz-executor) thread 0xffff8000fffef4d8 (497937) exclusive rrwlock inode r = 0 (0xfffffd8076487468) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8076487218) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #13 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 11154K 11491K 166960K 13447 0 pcb 18 15K 17K 166960K 374 0 rtable 202 10K 12K 166960K 422 0 pf 37 18K 67485K 166960K 171 0 ifaddr 40 7K 8K 166960K 120 0 ifgroup 53 2K 2K 166960K 192 0 sysctl 4 1K 9K 166960K 25 0 counters 68 36K 37K 166960K 240 0 ioctlops 0 0K 4K 166960K 1862 0 iov 0 0K 28K 166960K 110 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1441 91K 91K 166960K 2541 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 22 6K 7K 166960K 43 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 1448 0 sigio 0 0K 0K 166960K 24 0 proc 72 115K 180K 166960K 720 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 199 0 in_multi 85 6K 7K 166960K 242 0 ether_multi 1 0K 0K 166960K 22 0 mrt 1 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 697 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 258 181K 186K 166960K 15255 0 UVM aobj 11 2K 2K 166960K 12 0 pinsyscall 42 84K 104K 166960K 2603 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 45 0 NDP 12 0K 2K 166960K 87 0 temp 80 8652K 8732K 166960K 51309 0 kqueue 15 24K 31K 166960K 251 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 120 116 0 113 1 0 1 1 0 8 0 rtentry 176 136 0 57 5 0 5 5 0 8 0 unpcb 144 1296 0 1275 15 9 6 6 0 8 5 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 736 396 0 392 8 7 1 7 0 8 0 arp 136 15 0 3 1 0 1 1 0 8 0 inpcb 328 1410 0 1399 17 10 7 7 0 8 6 nd6 152 27 0 10 1 0 1 1 0 8 0 pkpcb 40 7 0 7 4 4 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 76 0 75 1 0 1 1 0 8 0 pppxif 1504 6 0 6 3 3 0 1 0 8 0 pffrag 232 6 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 2 1 0 1 1 0 8 0 pffrent 40 12 0 8 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 1 0 1 0 8 0 pfstitem 24 97 0 51 1 0 1 1 0 8 0 pfstkey 128 97 0 51 2 0 2 2 0 8 0 pfstate 384 96 0 51 6 0 6 6 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 611 0 265 31 5 26 29 0 8 1 art_table 40 614 0 265 5 0 5 5 0 8 0 art_node 32 135 0 67 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 7 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 33 0 13 1 0 1 1 0 8 0 shmpl 112 9 0 1 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3939 0 2423 96 0 96 96 0 8 0 ffsino 296 3939 0 2423 119 1 118 118 0 8 0 nchpl 144 6056 0 4363 64 0 64 64 0 8 0 rtmask 32 16 0 16 3 2 1 1 0 8 1 uvmvnodes 80 4763 0 0 98 0 98 98 0 8 0 vnodes 216 4763 0 0 265 0 265 265 0 8 0 namei 1024 21111 0 21111 2 1 1 2 0 8 1 percpumem 16 135 0 86 1 0 1 1 0 8 0 kstatmem 264 136 0 110 5 3 2 3 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 40057 0 40055 18 16 2 8 1 8 1 plimitpl 152 290 0 270 1 0 1 1 0 8 0 sigapl 424 1783 0 1715 9 1 8 8 0 8 0 knotepl 120 396 0 0 12 0 12 12 0 8 0 kqueuepl 224 716 0 701 12 11 1 5 0 8 0 pipepl 344 274 0 247 10 7 3 6 0 8 0 fdescpl 528 1722 0 1691 3 0 3 3 0 8 0 filepl 160 11626 0 11391 31 15 16 22 0 8 5 lockfpl 104 688 0 686 2 1 1 2 0 8 0 lockfspl 48 309 0 307 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 70 0 53 1 0 1 1 0 8 0 ucredpl 104 1523 0 1510 1 0 1 1 0 8 0 zombiepl 144 1716 0 1715 1 0 1 1 0 8 0 processpl 1232 1783 0 1715 7 1 6 6 0 8 0 procpl 664 3938 0 3857 10 2 8 8 0 8 0 sosppl 168 4 0 4 2 1 1 1 0 8 1 sockpl 752 2847 0 2812 35 18 17 18 0 8 13 mcl64k 65536 16 0 0 2 0 2 2 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 294 0 0 18 0 18 18 0 8 0 bufpl 280 17745 0 11602 439 0 439 439 0 8 0 anonpl 32 12980 0 0 106 1 105 105 0 246 0 amapchunkpl 152 50797 0 50144 46 15 31 31 0 158 4 amappl16 200 5984 0 5867 59 48 11 31 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 120 0 108 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2407 0 2376 4 2 2 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 114 0 101 1 0 1 1 0 8 0 amappl6 120 202 0 199 1 0 1 1 0 8 0 amappl5 112 137 0 127 1 0 1 1 0 8 0 amappl4 104 313 0 293 1 0 1 1 0 8 0 amappl3 96 8776 0 8671 3 0 3 3 0 8 0 amappl2 88 1960 0 1883 2 0 2 2 0 8 0 amappl1 80 13830 0 13223 14 0 14 14 0 8 0 amappl 88 14293 0 14111 5 0 5 5 0 92 0 dma16384 16384 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 2 1 1 1 0 8 1 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 2 0 1 0 8 0 dma64 64 8 0 8 3 3 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 11 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1722 0 1691 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1722 0 1691 1 0 1 1 0 8 0 vmmpekpl 168 15090 0 15044 3 0 3 3 0 8 0 vmmpepl 168 111626 0 109524 123 29 94 115 0 357 0 vmsppl 488 1721 0 1691 5 0 5 5 0 8 0 rwobjpl 80 35037 0 29228 121 2 119 119 0 8 0 pdppl 4096 3452 0 3382 110 38 72 88 0 8 2 pvpl 32 25313 0 0 205 1 204 204 0 265 0 pmappl 256 1721 0 1691 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 307 0 58 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7b613db1a010, 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:662 comcnputc(800,66) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,66) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(66) at cnputc+0x67 sys/dev/cons.c:218 kputchar(66,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 printf(ffffffff834171f4) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80003c456b00,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:624 kerntrap(ffff80003c456b00) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:485 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001493000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,1,2000,ffff80003c4a1a20) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80003c4a1a20) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 end trace frame: 0xffff80003c456ca0, 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:662 comcnputc(800,66) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,66) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(66) at cnputc+0x67 sys/dev/cons.c:218 kputchar(66,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 printf(ffffffff834171f4) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80003c456b00,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:624 kerntrap(ffff80003c456b00) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:485 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001493000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,1,2000,ffff80003c4a1a20) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80003c4a1a20) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c456cb0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806035b458,1,fffffd80097fb410,ffff80003c4a1a20) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c505338,ffff80003c4a1a20) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c505338,ffff80003c4a1a20) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c505338,ffff80003c4a1a20) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c505338,ffff80003c4a1a20) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c4a1a20) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c4a1a20,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4a1a20,ffff80003c457020,ffff80003c456f70) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c457020) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c457020) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78934c7ad1a0, count: -24