*cpu1: uvm_fault(0xfffffd800f7bf208, 0x0, 0, 1) -> e ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x758fce73860, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c44b4a0 rbx 0 rdx 0xffff800001447e40 rcx 0xffff80003a408a88 rax 0x33 r8 0xffff80003c44b3d0 r9 0 r10 0xf32c8acb1070059b r11 0x2ee083a0ec07f87f r12 0 r13 0 r14 0xffff80003a408a88 r15 0 rip 0xffffffff82ae33ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c44b420 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=119485 pid=28432 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a4094e8,0xffff8000ffff2028 process=0xffff8000ffff6b58 user=0xffff80003c446000, vmspace=0xfffffd800f7bf7c0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79755 472509 34877 0 2 0 syz-executor 79755 145267 34877 0 3 0x4000000 biowait syz-executor 28432 51385 45888 0 2 0 syz-executor *28432 119485 45888 0 7 0x4000000 syz-executor 84485 253630 32083 0 2 0 syz-executor 84485 151184 32083 0 2 0x4000000 syz-executor 45862 159478 68504 0 2 0 syz-executor 45862 442907 68504 0 3 0x4000080 fsleep syz-executor 45862 135293 68504 0 3 0x4000080 fsleep syz-executor 63689 169383 0 0 3 0x14200 acct acct 38163 447252 23524 0 3 0x4003000 suspend syz-executor 38163 125968 23524 0 2 0x4081000 syz-executor 38163 123490 23524 0 3 0x4081000 inode syz-executor 41783 45243 1 0 3 0x100083 ttyin getty 8978 45225 96009 0 3 0x82 wait syz-executor 45888 308218 96009 0 3 0x82 nanoslp syz-executor 17613 374080 96009 0 2 0x2 syz-executor 28259 158441 6581 0 3 0x100082 sbwait arp 6581 156713 4302 0 3 0x10008a sigsusp sh 4302 426247 96009 0 3 0x82 wait syz-executor 68504 398720 96009 0 3 0x82 nanoslp syz-executor 23524 371549 96009 0 3 0x82 wait syz-executor 34877 144078 96009 0 3 0x82 nanoslp syz-executor 32083 5663 96009 0 2 0x2 syz-executor 96009 79591 5344 0 3 0x82 kqread syz-executor 5344 234309 13059 0 3 0x10008a sigsusp ksh 13059 346720 73290 0 3 0x98 kqread sshd-session 73290 232388 6690 0 3 0x92 kqread sshd-session 6690 231003 1 0 3 0x88 kqread sshd 89859 15760 33161 74 3 0x1100092 bpf pflogd 33161 242921 1 0 3 0x80 sbwait pflogd 237 222157 1428 73 3 0x1100090 kqread syslogd 1428 165275 1 0 3 0x100082 sbwait syslogd 26642 301205 1 0 3 0x100080 kqread resolvd 22047 331260 60978 77 3 0x100092 kqread dhcpleased 50458 389615 60978 77 3 0x100092 kqread dhcpleased 60978 414614 1 0 3 0x80 kqread dhcpleased 1333 77979 0 0 3 0x14200 bored smr 39972 43876 0 0 2 0x14200 zerothread 69606 464196 0 0 3 0x14200 aiodoned aiodoned 7962 180407 0 0 3 0x14200 syncer update 36101 412645 0 0 3 0x14200 cleaner cleaner 1247 302287 0 0 3 0x14200 reaper reaper 58785 261625 0 0 3 0x14200 pgdaemon pagedaemon 87505 184907 0 0 3 0x14200 bored viomb 41765 422877 0 0 3 0x40014200 acpi0 acpi0 81211 510380 0 0 3 0x40014200 idle1 44298 181883 0 0 3 0x14200 bored softnet1 97741 132822 0 0 3 0x14200 bored softnet0 95376 454372 0 0 3 0x14200 bored systqmp 64180 247134 0 0 3 0x14200 bored systq 55141 397616 0 0 3 0x14200 tmoslp softclockmp 14876 211643 0 0 3 0x40014200 tmoslp softclock 87630 215552 0 0 3 0x40014200 idle0 1 287706 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff83a00420) #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 sleep_finish+0x1d6 sys/kern/kern_synch.c:355 #3 msleep_nsec+0x132 sys/kern/kern_synch.c:219 #4 reaper+0x15b sys/kern/kern_exit.c:477 #5 proc_trampoline+0x10 Process 79755 (syz-executor) thread 0xffff8000ffff2018 (145267) exclusive rrwlock inode r = 0 (0xfffffd806c823ec0) #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:765 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c8238f8) #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:765 #9 Xsyscall+0x128 Process 28432 (syz-executor) thread 0xffff80003a4082c0 (51385) exclusive rwlock vmmaplk r = 0 (0xfffffd800f7bf8c0) #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:622 #7 recall_trap+0x8 Process 28432 (syz-executor) thread 0xffff80003a408a88 (119485) exclusive rwlock fdlock r = 0 (0xffff80003a3f8ac0) #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 sys_socket+0x203 sys/kern/uipc_syscalls.c:106 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #4 Xsyscall+0x128 exclusive mutex &sched_lock r = 0 (0xffffffff83a00420) #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 sleep_finish+0x1d6 sys/kern/kern_synch.c:355 #3 msleep_nsec+0x132 sys/kern/kern_synch.c:219 #4 reaper+0x15b sys/kern/kern_exit.c:477 #5 proc_trampoline+0x10 Process 84485 (syz-executor) thread 0xffff8000ffff27e0 (151184) exclusive rwlock vmmaplk r = 0 (0xfffffd800f7bfe78) #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 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:510 #7 alltraps_kern_meltdown+0x7b #8 _copyin+0x5b #9 ptcwrite+0x193 sys/kern/tty_pty.c:551 #10 spec_write+0x11f sys/kern/spec_vnops.c:302 #11 VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 #12 vn_write+0x1d3 sys/kern/vfs_vnops.c:408 #13 dofilewritev+0x242 sys/kern/sys_generic.c:380 #14 sys_writev+0xd8 sys/kern/sys_generic.c:327 #15 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #15 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #16 Xsyscall+0x128 Process 38163 (syz-executor) thread 0xffff80003a409cb0 (125968) exclusive rrwlock inode r = 0 (0xfffffd806c823c70) #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 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:765 #9 Xsyscall+0x128 Process 38163 (syz-executor) thread 0xffff80003a409250 (123490) exclusive rrwlock inode r = 0 (0xfffffd806c823b48) #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 uipc_bind+0x328 sys/kern/uipc_usrreq.c:371 #8 sys_bind+0x2f6 sys/kern/uipc_syscalls.c:190 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10230 11259K 11846K 166960K 12625 0 pcb 19 13K 13K 166960K 165 0 rtable 221 9K 9K 166960K 631 0 pf 37 18K 20K 166960K 133 0 ifaddr 41 7K 8K 166960K 106 0 ifgroup 58 2K 2K 166960K 180 0 sysctl 4 1K 9K 166960K 14 0 counters 68 36K 37K 166960K 182 0 ioctlops 0 0K 4K 166960K 1756 0 iov 0 0K 16K 166960K 41 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1362 86K 86K 166960K 2066 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 21 0 VM map 2 1K 1K 166960K 2 0 sem 14 10K 20K 166960K 24 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 114K 166960K 994 0 sigio 0 0K 0K 166960K 9 0 proc 72 115K 180K 166960K 736 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 0 0K 0K 166960K 77 0 in_multi 88 6K 7K 166960K 168 0 ether_multi 1 0K 0K 166960K 6 0 mrt 2 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 115 519K 519K 166960K 115 0 exec 0 0K 1K 166960K 729 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 255 145K 160K 166960K 10912 0 UVM aobj 36 8K 8K 166960K 36 0 pinsyscall 45 90K 110K 166960K 2231 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 39 0 NDP 12 0K 1K 166960K 68 0 temp 68 8669K 8740K 166960K 39578 0 kqueue 14 22K 32K 166960K 221 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 120 177 0 173 3 2 1 3 0 8 0 rtentry 176 177 0 85 5 0 5 5 0 8 0 unpcb 144 702 0 682 6 4 2 4 0 8 1 syncache 336 6 0 6 2 2 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 195 0 189 2 1 1 2 0 8 0 arp 136 28 0 11 1 0 1 1 0 8 0 inpcb 328 1035 0 1023 14 11 3 7 0 8 1 nd6 152 32 0 9 1 0 1 1 0 8 0 pkpcb 40 43 0 43 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 38 0 38 2 1 1 1 0 8 1 pppxif 1504 7 0 7 2 1 1 1 0 8 1 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 7 0 1 1 0 1 1 0 482 0 pffrnode 88 7 0 1 1 0 1 1 0 8 0 pffrent 40 10 0 4 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 78 0 21 1 0 1 1 0 8 0 pfstkey 128 83 0 26 2 0 2 2 0 8 0 pfstate 448 81 0 24 7 0 7 7 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 776 0 373 28 2 26 27 0 8 0 art_table 40 777 0 373 5 0 5 5 0 8 0 art_node 32 174 0 92 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 12 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 18 0 6 1 0 1 1 0 8 0 shmpl 112 31 0 0 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 3213 0 1704 95 0 95 95 0 8 0 ffsino 296 3213 0 1704 117 0 117 117 0 8 0 nchpl 144 4584 0 2871 64 0 64 64 0 8 0 rtmask 32 9 0 9 2 1 1 1 0 8 1 vnodes 216 3655 0 0 204 0 204 204 0 8 0 namei 1024 15579 0 15577 3 2 1 2 0 8 0 percpumem 16 106 0 57 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 840 2 0 0 1 0 1 1 0 8 0 kstatmem 264 98 0 72 4 1 3 3 0 8 1 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 16366 0 16365 11 10 1 8 1 8 0 plimitpl 152 199 0 178 1 0 1 1 0 8 0 sigapl 424 1306 0 1256 7 0 7 7 0 8 0 knotepl 120 456 0 0 14 0 14 14 0 8 0 kqueuepl 224 344 0 334 3 2 1 2 0 8 0 pipepl 344 356 0 329 9 6 3 9 0 8 0 fdescpl 528 1287 0 1254 3 0 3 3 0 8 0 filepl 160 7927 0 7694 20 7 13 20 0 8 0 lockfpl 104 410 0 407 2 1 1 2 0 8 0 lockfspl 48 196 0 193 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 48 0 31 1 0 1 1 0 8 0 ucredpl 104 1073 0 1060 1 0 1 1 0 8 0 zombiepl 144 1432 0 1429 1 0 1 1 0 8 0 processpl 1232 1306 0 1256 5 1 4 5 0 8 0 procpl 664 2770 0 2713 6 0 6 6 0 8 0 sosppl 176 5 0 5 3 2 1 1 0 8 1 sockpl 752 1971 0 1935 26 19 7 17 0 8 3 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 59 0 0 8 0 8 8 0 8 0 mtagpl 96 53 0 0 2 0 2 2 0 8 0 mbufpl 256 4286 0 0 268 0 268 268 0 8 0 bufpl 280 5237 0 135 365 0 365 365 0 8 0 anonpl 32 9587 0 0 78 0 78 78 0 246 0 amapchunkpl 152 43756 0 43238 40 12 28 33 0 158 5 amappl16 200 4072 0 3867 26 15 11 15 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 11 0 11 2 2 0 1 0 8 0 amappl13 176 464 0 461 1 0 1 1 0 8 0 amappl12 168 1680 0 1635 3 0 3 3 0 8 0 amappl11 160 24 0 24 2 2 0 1 0 8 0 amappl10 152 51 0 37 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 29 0 27 1 0 1 1 0 8 0 amappl7 128 93 0 91 1 0 1 1 0 8 0 amappl6 120 320 0 305 1 0 1 1 0 8 0 amappl5 112 88 0 77 1 0 1 1 0 8 0 amappl4 104 530 0 496 2 1 1 2 0 8 0 amappl3 96 6337 0 6238 4 1 3 3 0 8 0 amappl2 88 1413 0 1335 2 0 2 2 0 8 0 amappl1 80 13546 0 12924 16 1 15 16 0 8 0 amappl 88 9948 0 9773 6 1 5 5 0 92 0 uvmvnodes 80 143 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 1 0 1 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 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 2 0 2 1 1 0 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 6 0 6 1 1 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 35 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1287 0 1254 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1287 0 1254 1 0 1 1 0 8 0 vmmpekpl 168 12292 0 12242 3 0 3 3 0 8 0 vmmpepl 168 88417 0 86229 103 7 96 98 0 357 0 vmsppl 488 1286 0 1254 5 0 5 5 0 8 0 rwobjpl 80 25805 0 24470 28 0 28 28 0 8 0 pdppl 4096 2585 0 2510 119 44 75 85 0 8 0 pvpl 32 15955 0 0 129 0 129 129 0 265 0 pmappl 256 1288 0 1254 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 563 0 57 15 0 15 15 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x758fce73860, 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(800,70) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,70) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(70) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8339117d) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c438f90) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline] db_ktrap(6,0,ffff80003c438f90) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c438f90) at kerntrap+0x242 sys/arch/amd64/amd64/trap.c:501 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000145f000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,1,2000,ffff8000ffffd760) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,1,2000,ffff8000ffffd760) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 end trace frame: 0xffff80003c439130, 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(800,70) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,70) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(70) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8339117d) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c438f90) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline] db_ktrap(6,0,ffff80003c438f90) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c438f90) at kerntrap+0x242 sys/arch/amd64/amd64/trap.c:501 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000145f000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,1,2000,ffff8000ffffd760) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,1,2000,ffff8000ffffd760) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c439140) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8076770ce0,1,fffffd80097fd548,ffff8000ffffd760) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8063811610,ffff8000ffffd760) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8063811610,ffff8000ffffd760) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8063811610,ffff8000ffffd760) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8063811610,ffff8000ffffd760) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000ffffd760) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffffd760,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000ffffd760,ffff80003c4394b0,ffff80003c439400) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4394b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4394b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d9ca2ab9630, count: -24