*cpu0: uvm_fault(0xfffffd806629d038, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x750ff5ab7d90, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3385a0 rbx 0 rdx 0 rcx 0xffff80003c477250 rax 0x3b r8 0xffff80002a3384d0 r9 0 r10 0x7f5e56eada5b6702 r11 0x426f8ee46d28caeb r12 0 r13 0 r14 0xffff80003c477250 r15 0 rip 0xffffffff810de3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a338520 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=345146 pid=55249 tcnt=2 stat=onproc flags process=0 proc=0 runpri=81, usrpri=82, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffd4c8,0xffff80003c4cad40 process=0xffff80003c4ccea0 user=0xffff80002a333000, vmspace=0xfffffd806629d9c0 estcpu=32, cpticks=2, pctcpu=0.1, user=1, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97396 397879 54423 0 2 0 syz-executor *55249 345146 63165 0 7 0 syz-executor 55249 444962 63165 0 3 0x4000080 fsleep syz-executor 59816 455723 59129 0 2 0 syz-executor 59816 442416 59129 0 3 0x4000080 ttyin syz-executor 59816 24943 59129 0 3 0x4000080 kqpoll syz-executor 60022 181705 29519 0 2 0 syz-executor 60022 82590 29519 0 3 0x4000080 kqsel syz-executor 60022 263631 29519 0 3 0x4000080 kqsel syz-executor 44787 205729 53994 0 3 0x90 nanoslp syz-executor 44787 103949 53994 0 3 0x4000090 sbwait syz-executor 44787 268914 53994 0 3 0x4000090 fsleep syz-executor 69872 182001 0 0 3 0x14200 acct acct 59129 421288 1467 0 2 0xc82 syz-executor 53994 114730 1467 0 2 0xc82 syz-executor 10005 53543 0 0 3 0x14280 nfsidl nfsio 30140 458005 0 0 3 0x14280 nfsidl nfsio 75862 287019 0 0 3 0x14280 nfsidl nfsio 19080 176363 0 0 3 0x14280 nfsidl nfsio 83388 312599 0 0 3 0x14280 nfsidl nfsio 3398 168885 0 0 3 0x14280 nfsidl nfsio 14649 183398 0 0 3 0x14280 nfsidl nfsio 4923 307597 0 0 3 0x14280 nfsidl nfsio 67520 227864 0 0 3 0x14280 nfsidl nfsio 95127 79532 0 0 3 0x14280 nfsidl nfsio 61749 173998 0 0 3 0x14280 nfsidl nfsio 75654 481767 0 0 3 0x14280 nfsidl nfsio 19530 517018 0 0 3 0x14280 nfsidl nfsio 61704 122338 0 0 3 0x14280 nfsidl nfsio 38348 311176 0 0 3 0x14280 nfsidl nfsio 75002 101775 0 0 3 0x14280 nfsidl nfsio 78213 129830 0 0 3 0x14280 nfsidl nfsio 51938 433712 0 0 3 0x14280 nfsidl nfsio 5397 461314 0 0 3 0x14280 nfsidl nfsio 97509 214664 0 0 3 0x14280 nfsidl nfsio 89644 236710 1467 0 2 0xc82 syz-executor 67119 520373 1467 0 2 0x2 syz-executor 63165 360657 1467 0 3 0x82 nanoslp syz-executor 29519 156603 1467 0 3 0x82 nanoslp syz-executor 54423 370931 1467 0 3 0x82 nanoslp syz-executor 45720 204635 1467 0 3 0x82 wait syz-executor 1467 169547 10961 0 3 0x82 kqread syz-executor 10961 275143 99592 0 3 0x10008a sigsusp ksh 99592 152586 30947 0 3 0x98 kqread sshd-session 30947 187893 18026 0 3 0x92 kqread sshd-session 97033 51377 1 0 3 0x100083 ttyopn getty 18026 135158 1 0 3 0x88 kqread sshd 44632 231549 11491 74 3 0x1100092 bpf pflogd 11491 195437 1 0 3 0x80 sbwait pflogd 41519 143586 84487 73 3 0x1100090 kqread syslogd 84487 496896 1 0 3 0x100082 sbwait syslogd 31291 252602 1 0 3 0x100080 kqread resolvd 70791 320041 69187 77 3 0x100092 kqread dhcpleased 44343 178339 69187 77 3 0x100092 kqread dhcpleased 69187 314112 1 0 3 0x80 kqread dhcpleased 17680 408118 0 0 2 0x14200 smr 2693 10609 0 0 2 0x14200 zerothread 94630 458278 0 0 3 0x14200 aiodoned aiodoned 61118 176316 0 0 3 0x14200 syncer update 95620 10067 0 0 3 0x14200 cleaner cleaner 91016 5829 0 0 3 0x14200 reaper reaper 75074 312215 0 0 3 0x14200 pgdaemon pagedaemon 8159 404748 0 0 3 0x14200 bored viomb 15962 288097 0 0 3 0x40014200 acpi0 acpi0 96567 209282 0 0 3 0x40014200 idle1 56715 484987 0 0 3 0x14200 bored softnet1 7051 394396 0 0 3 0x14200 bored softnet0 20575 466583 0 0 3 0x14200 bored systqmp 34777 361843 0 0 3 0x14200 bored systq 5561 502280 0 0 3 0x14200 tmoslp softclockmp 68944 475761 0 0 3 0x40014200 tmoslp softclock 14471 263125 0 0 3 0x40014200 idle0 1 97077 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &map->flags_lock r = 0 (0xfffffd806629db38) #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 vm_map_lock_ln+0x13f sys/uvm/uvm_map.c:5172 #4 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #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:775 #7 Xsyscall+0x128 Process 55249 (syz-executor) thread 0xffff80003c477250 (345146) exclusive rwlock vmmaplk r = 0 (0xfffffd806629dac0) #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:5171 #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:775 #6 Xsyscall+0x128 exclusive mutex &map->flags_lock r = 0 (0xfffffd806629db38) #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 vm_map_lock_ln+0x13f sys/uvm/uvm_map.c:5172 #4 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #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:775 #7 Xsyscall+0x128 Process 67119 (syz-executor) thread 0xffff80002a270fa8 (520373) exclusive rrwlock inode r = 0 (0xfffffd800f44bec0) #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:686 #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:775 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d3c2200) #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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10255 11267K 11531K 166960K 14804 0 pcb 17 16K 18K 166960K 345 0 rtable 259 12K 12K 166960K 729 0 pf 38 18K 26K 166960K 251 0 ifaddr 42 7K 8K 166960K 108 0 ifgroup 55 2K 2K 166960K 181 0 sysctl 4 1K 9K 166960K 26 0 counters 68 36K 37K 166960K 216 0 ioctlops 0 0K 4K 166960K 1935 0 iov 0 0K 24K 166960K 116 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1437 90K 91K 166960K 3237 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 75 0 dirhash 12 2K 3K 166960K 48 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 2052 0 sigio 0 0K 0K 166960K 41 0 proc 72 115K 147K 166960K 756 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 251 0 in_multi 96 7K 7K 166960K 190 0 ether_multi 1 0K 0K 166960K 11 0 mrt 1 0K 0K 166960K 23 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 836 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 244 181K 197K 166960K 19606 0 UVM aobj 29 12K 12K 166960K 36 0 pinsyscall 42 84K 102K 166960K 3279 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 194 0 NDP 12 0K 2K 166960K 79 0 temp 82 8680K 8752K 166960K 87459 0 kqueue 13 20K 30K 166960K 360 0 SYN cache 2 0K 16K 166960K 4 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 120 190 0 187 1 0 1 1 0 8 0 rtentry 176 181 0 74 6 0 6 6 0 8 0 unpcb 144 1327 0 1306 5 3 2 4 0 8 1 syncache 336 12 0 12 5 4 1 1 0 8 1 tcpcb 736 687 0 683 16 9 7 7 0 8 6 arp 136 28 0 8 1 0 1 1 0 8 0 inpcb 328 1951 0 1940 29 19 10 12 0 8 8 nd6 152 38 0 10 2 0 2 2 0 8 0 pkpcb 40 11 0 11 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 61 0 61 3 2 1 1 0 8 1 pppxif 1504 6 0 6 3 3 0 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 15 0 5 1 0 1 1 0 482 0 pffrnode 88 13 0 3 1 0 1 1 0 8 0 pffrent 40 73 0 63 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 3 0 3 2 2 0 1 0 8 0 pfanchor 1288 3 0 2 2 1 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 32 0 20 1 0 1 1 0 8 0 pfstkey 128 36 0 25 1 0 1 1 0 8 0 pfstate 448 32 0 22 4 0 4 4 0 8 1 pfrule 1344 33 0 27 2 1 1 2 0 8 0 rttmr 136 5 0 5 3 2 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 742 0 301 33 2 31 31 0 8 3 art_table 40 745 0 301 6 0 6 6 0 8 1 art_node 32 178 0 82 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 69 0 59 1 0 1 1 0 8 0 shmpl 112 26 0 4 1 0 1 1 0 8 0 dirhash 1024 41 0 24 3 0 3 3 0 8 0 dino2pl 256 5040 0 3527 96 0 96 96 0 8 0 ffsino 296 5040 0 3527 118 0 118 118 0 8 0 nchpl 144 7813 0 6107 64 0 64 64 0 8 0 rtmask 32 17 0 17 3 2 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 27210 0 27210 3 2 1 2 0 8 1 percpumem 16 123 0 74 1 0 1 1 0 8 0 vcpupl 3968 6 0 2 1 0 1 1 0 8 0 vmpool 840 7 0 3 1 0 1 1 0 8 0 kstatmem 264 116 0 90 5 2 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 7 0 7 3 2 1 1 0 8 1 scxspl 216 46151 0 46151 13 12 1 8 1 8 1 plimitpl 152 616 0 598 1 0 1 1 0 8 0 sigapl 424 2352 0 2284 8 0 8 8 0 8 0 knotepl 120 575 0 0 18 0 18 18 0 8 0 kqueuepl 224 875 0 863 11 6 5 5 0 8 4 pipepl 344 317 0 290 7 4 3 6 0 8 0 fdescpl 528 2314 0 2283 3 0 3 3 0 8 0 filepl 160 14610 0 14380 28 12 16 17 0 8 5 lockfpl 104 1121 0 1119 3 1 2 2 0 8 1 lockfspl 48 362 0 360 1 0 1 1 0 8 0 sessionpl 144 32 0 23 1 0 1 1 0 8 0 pgrppl 48 79 0 62 1 0 1 1 0 8 0 ucredpl 104 2434 0 2420 1 0 1 1 0 8 0 zombiepl 144 2286 0 2284 2 1 1 1 0 8 0 processpl 1232 2352 0 2284 7 1 6 6 0 8 0 procpl 664 5440 0 5365 8 0 8 8 0 8 0 sosppl 176 12 0 12 3 2 1 1 0 8 1 sockpl 752 3532 0 3497 36 24 12 17 0 8 8 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 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 120 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 80 0 0 8 0 8 8 0 8 0 mtagpl 96 271 0 0 7 0 7 7 0 8 0 mbufpl 256 1480 0 0 90 0 90 90 0 8 0 bufpl 280 18109 0 11972 439 0 439 439 0 8 0 anonpl 32 18963 0 0 153 0 153 153 0 246 0 amapchunkpl 152 68678 0 68067 53 12 41 41 0 158 11 amappl16 200 9044 0 8780 64 29 35 40 0 8 7 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 6 0 6 1 1 0 1 0 8 0 amappl13 176 473 0 472 1 0 1 1 0 8 0 amappl12 168 2720 0 2679 3 0 3 3 0 8 0 amappl11 160 9 0 9 2 2 0 1 0 8 0 amappl10 152 74 0 59 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 47 0 44 1 0 1 1 0 8 0 amappl7 128 96 0 94 1 0 1 1 0 8 0 amappl6 120 320 0 304 1 0 1 1 0 8 0 amappl5 112 91 0 79 1 0 1 1 0 8 0 amappl4 104 474 0 444 1 0 1 1 0 8 0 amappl3 96 12075 0 11991 5 2 3 3 0 8 0 amappl2 88 2474 0 2398 2 0 2 2 0 8 0 amappl1 80 18939 0 18350 14 0 14 14 0 8 0 amappl 88 18518 0 18353 5 0 5 5 0 92 0 uvmvnodes 80 162 0 0 4 0 4 4 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 12 0 12 2 2 0 1 0 8 0 dma128 128 255 0 255 3 2 1 1 0 8 1 dma64 64 6 0 6 1 1 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 35 0 7 1 0 1 1 0 8 0 uaddrrnd 24 2314 0 2283 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2314 0 2283 1 0 1 1 0 8 0 vmmpekpl 168 19343 0 19296 3 0 3 3 0 8 0 vmmpepl 168 153339 0 151160 131 13 118 119 0 357 7 vmsppl 488 2313 0 2283 8 3 5 5 0 8 0 rwobjpl 80 42137 0 40784 39 2 37 38 0 8 1 pdppl 4096 4650 0 4576 115 39 76 82 0 8 2 pvpl 32 24961 0 0 201 0 201 201 0 265 0 pmappl 256 2320 0 2286 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 405 0 63 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83867ff0) 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_write_1(3f8,0,75) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,75) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,75) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(75) at cnputc+0x67 sys/dev/cons.c:218 kputchar(75,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 printf(ffffffff834587c4) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80003c43f740,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:653 kerntrap(ffff80003c43f740) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:516 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001487000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c4ca2d0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c4ca2d0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 end trace frame: 0xffff80003c43f8e0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83867ff0) 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_write_1(3f8,0,75) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,75) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,75) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(75) at cnputc+0x67 sys/dev/cons.c:218 kputchar(75,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 printf(ffffffff834587c4) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80003c43f740,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:653 kerntrap(ffff80003c43f740) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:516 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001487000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c4ca2d0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c4ca2d0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c43f8f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805e81a870,81,fffffd80097fd3a8,ffff80003c4ca2d0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805fbbbe80,ffff80003c4ca2d0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805fbbbe80,ffff80003c4ca2d0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805fbbbe80,ffff80003c4ca2d0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805fbbbe80,ffff80003c4ca2d0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c4ca2d0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c4ca2d0,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4ca2d0,ffff80003c43fc60,ffff80003c43fbb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c43fc60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43fc60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x783b70732610, count: -24 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x750ff5ab7d90, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x750ff5ab7d90, count: -1