*cpu1: uvm_fault(0xfffffd806cb1f5d0, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79c274ac1b00, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a33ac40 rbx 0 rdx 0 rcx 0xffff8000fffefca0 rax 0x2a r8 0xffff80002a33ab70 r9 0 r10 0x9695cbf920787eea r11 0x7d0ad36c5f62e297 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff821ec4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a33abc0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=514989 pid=53656 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=0xffff8000fffef4d8,0xffff8000fffeea88 process=0xffff8000343e4020 user=0xffff80002a335000, vmspace=0xfffffd800f7a7d78 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 84195 455638 90837 0 2 0 syz-executor *53656 514989 23931 0 7 0 syz-executor 88787 508502 8409 0 2 0 syz-executor 88787 388990 8409 0 2 0x4000000 syz-executor 88787 302503 8409 0 3 0x4000080 fsleep syz-executor 7078 75749 82420 0 3 0x80 nanoslp syz-executor 7078 483853 82420 0 3 0x4000080 fsleep syz-executor 7078 168881 82420 0 3 0x4000080 ttyout syz-executor 40904 241029 61065 0 3 0x80 nanoslp syz-executor 40904 68966 61065 0 3 0x4000080 lockf syz-executor 40904 209462 61065 0 3 0x4000080 fsleep syz-executor 52067 70128 3684 0 3 0x80 nanoslp syz-executor 52067 159476 3684 0 3 0x4000080 kqsel syz-executor 52067 333907 3684 0 3 0x4000080 fsleep syz-executor 69391 263436 0 0 3 0x14200 acct acct 90837 141348 66900 0 3 0x82 nanoslp syz-executor 73531 519039 66900 0 3 0x82 nanoslp syz-executor 3684 90426 66900 0 3 0x82 nanoslp syz-executor 95323 155576 66900 0 3 0x82 nanoslp syz-executor 8409 402217 66900 0 3 0x82 nanoslp syz-executor 23931 457437 66900 0 3 0x82 nanoslp syz-executor 61065 73037 66900 0 3 0x82 nanoslp syz-executor 82420 412065 66900 0 3 0x82 nanoslp syz-executor 66900 166130 67669 0 3 0x82 kqread syz-executor 67669 200433 65485 0 3 0x10008a sigsusp ksh 65485 206891 53821 0 3 0x98 kqread sshd-session 53821 470358 18844 0 3 0x92 kqread sshd-session 77355 104883 1 0 3 0x100083 ttyin getty 18844 102990 1 0 3 0x88 kqread sshd 71307 172931 72622 74 3 0x1100092 bpf pflogd 72622 71497 1 0 3 0x80 sbwait pflogd 41880 227040 16390 73 3 0x1100090 kqread syslogd 16390 440167 1 0 3 0x100082 sbwait syslogd 67744 138158 1 0 3 0x100080 kqread resolvd 16101 40316 62423 77 3 0x100092 kqread dhcpleased 50218 67647 62423 77 3 0x100092 kqread dhcpleased 62423 259590 1 0 3 0x80 kqread dhcpleased 78226 408906 0 0 3 0x14200 pause smr 3577 193003 0 0 3 0x14200 pgzero zerothread 69764 35211 0 0 3 0x14200 aiodoned aiodoned 78623 438784 0 0 3 0x14200 syncer update 68852 224690 0 0 3 0x14200 cleaner cleaner 4014 431961 0 0 2 0x14200 reaper 51611 84082 0 0 3 0x14200 pgdaemon pagedaemon 72858 411719 0 0 3 0x14200 bored viomb 68507 72770 0 0 3 0x40014200 acpi0 acpi0 10544 35049 0 0 3 0x40014200 idle1 25526 168845 0 0 3 0x14200 bored softnet1 3252 230214 0 0 3 0x14200 bored softnet0 70822 524060 0 0 3 0x14200 bored systqmp 87660 482584 0 0 3 0x14200 bored systq 91647 362306 0 0 3 0x14200 tmoslp softclockmp 26987 334676 0 0 3 0x40014200 tmoslp softclock 95891 410136 0 0 3 0x40014200 idle0 1 319744 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 (0xfffffd80705b6b10) #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:2767 #4 uvm_fault_lower+0x608 sys/uvm/uvm_fault.c:1520 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #8 recall_trap+0x8 Process 53656 (syz-executor) thread 0xffff8000fffefca0 (514989) exclusive rwlock uobjlk r = 0 (0xfffffd80708e4828) #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_lower_lookup+0x53 sys/uvm/uvm_fault.c:1214 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1348 #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 shared rwlock vmmaplk r = 0 (0xfffffd800f7a7e78) #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:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #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 (0xfffffd80705b6b10) #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:2767 #4 uvm_fault_lower+0x608 sys/uvm/uvm_fault.c:1520 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #8 recall_trap+0x8 Process 88787 (syz-executor) thread 0xffff80003c438a88 (388990) exclusive rrwlock inode r = 0 (0xfffffd807e29fed0) #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 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 ufs_lookup+0x16bd sys/ufs/ufs/ufs_lookup.c:573 #7 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #8 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #9 namei+0x7ca sys/kern/vfs_lookup.c:250 #10 vn_open+0x15a sys/kern/vfs_vnops.c:140 #11 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806eb1dc90) #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 vn_open+0x15a sys/kern/vfs_vnops.c:140 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #10 Xsyscall+0x128 Process 4014 (reaper) thread 0xffff8000ffffdc90 (431961) exclusive rwlock kmmaplk r = 0 (0xffffffff839ab3c0) #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_unmap+0x7d sys/uvm/uvm_map.c:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:714 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1aa sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10254 11178K 15335K 166960K 17835 0 pcb 17 15K 16K 166960K 781 0 rtable 288 16K 16K 166960K 1154 0 pf 36 18K 82K 166960K 442 0 ifaddr 44 9K 10K 166960K 271 0 ifgroup 55 2K 2K 166960K 507 0 sysctl 4 1K 9K 166960K 34 0 counters 68 36K 38K 166960K 950 0 ioctlops 0 0K 4K 166960K 2602 0 iov 0 0K 24K 166960K 314 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1518 95K 96K 166960K 5240 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 9K 166960K 51 0 VM map 2 1K 1K 166960K 2 0 sem 14 136K 136K 166960K 186 0 dirhash 87 15K 18K 166960K 4959 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 114K 166960K 4000 0 sigio 0 0K 0K 166960K 83 0 proc 73 115K 180K 166960K 1137 0 subproc 72 4K 4K 166960K 147 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 487 0 in_multi 94 6K 7K 166960K 312 0 ether_multi 1 0K 0K 166960K 28 0 mrt 1 0K 0K 166960K 29 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 1312 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 245 161K 187K 166960K 37905 0 UVM aobj 27 36K 36K 166960K 31 0 pinsyscall 43 86K 102K 166960K 5414 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 247 0 NDP 12 0K 2K 166960K 211 0 temp 88 8680K 8938K 166960K 220911 0 kqueue 14 22K 33K 166960K 799 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 120 483 0 480 3 2 1 3 0 8 0 rtentry 176 294 0 181 6 0 6 6 0 8 0 unpcb 144 2905 0 2886 16 15 1 6 0 8 0 syncache 336 25 0 25 6 5 1 1 0 8 1 tcpqe 32 12 0 12 6 5 1 1 0 8 1 tcpcb 736 1071 0 1058 17 15 2 8 0 8 0 arp 136 48 0 25 1 0 1 1 0 8 0 inpcb 328 4166 0 4144 28 25 3 10 0 8 0 nd6 152 62 0 34 2 0 2 2 0 8 0 pkpcb 40 24 0 24 6 6 0 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 397 0 397 4 3 1 1 0 8 1 pppxif 1504 17 0 17 5 5 0 1 0 8 0 pffrag 232 61 0 52 1 0 1 1 0 482 0 pffrnode 88 58 0 50 1 0 1 1 0 8 0 pffrent 40 139 0 130 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 2 0 2 1 1 0 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 24 224 0 143 1 0 1 1 0 8 0 pfstkey 128 224 0 143 4 0 4 4 0 8 0 pfstate 448 224 0 143 12 0 12 12 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 7 0 7 3 3 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1240 0 788 38 9 29 30 0 8 0 art_table 40 1244 0 788 5 0 5 5 0 8 0 art_node 32 288 0 191 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 7 1 0 1 1 0 8 0 semapl 112 182 0 170 1 0 1 1 0 8 0 shmpl 112 8 0 1 1 0 1 1 0 8 0 dirhash 1024 1673 0 1630 8 1 7 7 0 8 1 dino2pl 256 9143 0 7612 97 0 97 97 0 8 0 ffsino 296 9143 0 7612 119 0 119 119 0 8 0 nchpl 144 14772 0 14197 65 39 26 65 0 8 0 rtmask 32 54 0 54 6 6 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 52844 0 52843 3 2 1 2 0 8 0 percpumem 16 490 0 441 1 0 1 1 0 8 0 vcpupl 3968 17 0 0 3 0 3 3 0 8 0 vmpool 840 20 0 3 2 0 2 2 0 8 0 kstatmem 264 360 0 334 5 2 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 14 0 14 6 5 1 1 0 8 1 scxspl 216 80426 0 80426 18 17 1 8 1 8 1 plimitpl 152 1116 0 1099 1 0 1 1 0 8 0 sigapl 424 4293 0 4244 7 1 6 7 0 8 0 knotepl 120 845 0 0 25 0 25 25 0 8 0 kqueuepl 224 1961 0 1949 14 13 1 5 0 8 0 pipepl 344 714 0 687 20 14 6 9 0 8 3 fdescpl 528 4270 0 4238 3 0 3 3 0 8 0 filepl 160 30772 0 30544 37 24 13 17 0 8 1 lockfpl 104 1262 0 1258 1 0 1 1 0 8 0 lockfspl 48 502 0 499 1 0 1 1 0 8 0 sessionpl 144 52 0 43 1 0 1 1 0 8 0 pgrppl 48 176 0 159 1 0 1 1 0 8 0 ucredpl 104 5272 0 5259 1 0 1 1 0 8 0 zombiepl 144 4806 0 4804 1 0 1 1 0 8 0 processpl 1232 4293 0 4244 5 0 5 5 0 8 0 procpl 664 11002 0 10942 8 2 6 7 0 8 0 sosppl 176 32 0 32 8 7 1 1 0 8 1 sockpl 752 7709 0 7665 49 43 6 18 0 8 1 mcl64k 65536 24 0 0 3 0 3 3 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 124 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 88 0 0 11 0 11 11 0 8 0 mtagpl 96 145 0 0 4 0 4 4 0 8 0 mbufpl 256 1168 0 0 73 0 73 73 0 8 0 bufpl 280 30503 0 24366 439 0 439 439 0 8 0 anonpl 32 15450 0 0 125 1 124 124 0 246 0 amapchunkpl 152 134829 0 134283 69 40 29 39 0 158 1 amappl16 200 12671 0 12554 99 68 31 32 0 8 14 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 10 0 8 1 0 1 1 0 8 0 amappl13 176 521 0 520 1 0 1 1 0 8 0 amappl12 168 4738 0 4697 3 0 3 3 0 8 0 amappl11 160 32 0 32 2 2 0 1 0 8 0 amappl10 152 49 0 34 1 0 1 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 129 0 127 1 0 1 1 0 8 0 amappl6 120 393 0 379 1 0 1 1 0 8 0 amappl5 112 103 0 92 1 0 1 1 0 8 0 amappl4 104 573 0 542 1 0 1 1 0 8 0 amappl3 96 23628 0 23541 4 1 3 3 0 8 0 amappl2 88 4556 0 4478 2 0 2 2 0 8 0 amappl1 80 31358 0 30777 14 0 14 14 0 8 0 amappl 88 36295 0 36128 5 0 5 5 0 92 0 uvmvnodes 80 215 0 0 5 0 5 5 0 8 0 dma65536 65536 4 0 4 3 3 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma2048 2048 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 3 0 1 0 8 0 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 30 0 4 1 0 1 1 0 8 0 uaddrrnd 24 4270 0 4238 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4270 0 4238 1 0 1 1 0 8 0 vmmpekpl 168 34430 0 34367 4 0 4 4 0 8 0 vmmpepl 168 278405 0 276349 166 48 118 119 0 357 4 vmsppl 488 4269 0 4238 5 0 5 5 0 8 0 rwobjpl 80 71415 0 70157 57 19 38 39 0 8 0 pdppl 4096 8587 0 8499 149 59 90 90 0 8 2 pvpl 32 24910 0 0 199 0 199 199 0 265 0 pmappl 256 4289 0 4241 4 0 4 4 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 456 0 103 11 0 11 11 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: 0x79c274ac1b00, 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: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(2d) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8334b8ae) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8340e862) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a37a930,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a37a930) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001474000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 end trace frame: 0xffff80002a37aa60, 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: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(2d) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8334b8ae) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8340e862) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a37a930,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a37a930) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001474000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(31e60,1,2000,ffff80003c4394e8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e60,1,2000,ffff80003c4394e8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a37aae0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd800e7a12e0,1,fffffd80097fd4e0,ffff80003c4394e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d951980,ffff80003c4394e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d951980,ffff80003c4394e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d951980,ffff80003c4394e8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806d951980,ffff80003c4394e8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c4394e8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c4394e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4394e8,ffff80002a37ae50,ffff80002a37ada0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a37ae50) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a37ae50) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ea32414aea0, count: -25