*cpu0: uvm_fault(0xfffffd800b0637a0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x8e2b4cf7db0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c401880 rbx 0 rdx 0 rcx 0xffff80003c41a7f0 rax 0x2a r8 0xffff80003c4017b0 r9 0 r10 0xbbc9b8ed36704ebd r11 0x74ef0245ef49256c r12 0 r13 0 r14 0 r15 0 rip 0xffffffff814cd4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c401800 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=307969 pid=85589 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c41ba18,0xffff80003c41aa98 process=0xffff8000fffee1c8 user=0xffff80003c3fc000, vmspace=0xfffffd806caae018 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47648 70712 87835 0 2 0 syz-executor 85589 385697 89706 0 2 0 syz-executor *85589 307969 89706 0 7 0x4000000 syz-executor 38675 104381 25096 0 2 0 syz-executor 38675 167114 25096 0 3 0x4000080 fifor syz-executor 62084 456940 9594 0 2 0 syz-executor 62084 107179 9594 0 3 0x4000080 fsleep syz-executor 82296 158825 14189 0 2 0 syz-executor 82296 106609 14189 0 3 0x4000080 fsleep syz-executor 77198 336905 0 0 3 0x14280 nfsidl nfsio 19095 77024 0 0 3 0x14280 nfsidl nfsio 73889 335090 0 0 3 0x14280 nfsidl nfsio 44762 366987 0 0 3 0x14280 nfsidl nfsio 66790 492297 0 0 3 0x14280 nfsidl nfsio 83679 82949 0 0 3 0x14280 nfsidl nfsio 69096 254610 0 0 3 0x14280 nfsidl nfsio 62643 263198 0 0 3 0x14280 nfsidl nfsio 97084 502062 0 0 3 0x14280 nfsidl nfsio 51018 520620 0 0 3 0x14280 nfsidl nfsio 74928 241609 0 0 3 0x14280 nfsidl nfsio 52994 22376 0 0 3 0x14280 nfsidl nfsio 67873 294555 0 0 3 0x14280 nfsidl nfsio 15573 107105 0 0 3 0x14280 nfsidl nfsio 2217 218898 0 0 3 0x14280 nfsidl nfsio 91993 468955 0 0 3 0x14280 nfsidl nfsio 5545 308195 0 0 3 0x14280 nfsidl nfsio 39522 284480 0 0 3 0x14280 nfsidl nfsio 48964 289045 0 0 3 0x14280 nfsidl nfsio 94132 107104 0 0 3 0x14280 nfsidl nfsio 87835 324040 12400 0 2 0x2 syz-executor 89706 378616 12400 0 2 0xc82 syz-executor 25239 251497 12400 0 2 0xc82 syz-executor 14189 385846 12400 0 3 0x82 nanoslp syz-executor 9594 121643 12400 0 3 0x82 nanoslp syz-executor 73183 459525 12400 0 2 0x2 syz-executor 25096 193820 12400 0 2 0xc82 syz-executor 57192 143462 12400 0 2 0xc82 syz-executor 12400 491349 75080 0 3 0x82 kqread syz-executor 75080 250023 39700 0 3 0x10008a sigsusp ksh 39700 276446 85689 0 3 0x98 kqread sshd-session 85689 408619 80219 0 3 0x92 kqread sshd-session 24678 271875 1 0 3 0x100083 ttyin getty 80219 52469 1 0 3 0x88 kqread sshd 25406 92945 67494 74 3 0x1100092 bpf pflogd 67494 22341 1 0 3 0x80 sbwait pflogd 2022 465092 50815 73 3 0x1100090 kqread syslogd 50815 160208 1 0 3 0x100082 sbwait syslogd 96088 156417 1 0 3 0x100080 kqread resolvd 94499 436661 7502 77 3 0x100092 kqread dhcpleased 5671 456246 7502 77 3 0x100092 kqread dhcpleased 7502 407521 1 0 3 0x80 kqread dhcpleased 34411 4958 0 0 3 0x14200 bored smr 3988 355913 0 0 2 0x14200 zerothread 14934 34846 0 0 3 0x14200 aiodoned aiodoned 48569 359291 0 0 3 0x14200 syncer update 20065 301886 0 0 3 0x14200 cleaner cleaner 5646 406329 0 0 3 0x14200 reaper reaper 4230 493122 0 0 3 0x14200 pgdaemon pagedaemon 86641 117839 0 0 3 0x14200 bored viomb 69753 292252 0 0 3 0x40014200 acpi0 acpi0 19877 502918 0 0 3 0x40014200 idle1 68150 306098 0 0 3 0x14200 bored softnet1 10333 35857 0 0 2 0x14200 softnet0 83152 45898 0 0 3 0x14200 bored systqmp 37785 26000 0 0 3 0x14200 bored systq 52194 164695 0 0 3 0x14200 tmoslp softclockmp 44355 60470 0 0 3 0x40014200 tmoslp softclock 48392 314115 0 0 3 0x40014200 idle0 1 339764 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c518410) #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 85589 (syz-executor) thread 0xffff80003c41a7f0 (307969) exclusive rwlock amaplk r = 0 (0xfffffd806c5924d8) #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_check+0x8bb sys/uvm/uvm_fault.c:840 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #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 (0xfffffd806caae118) #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 (0xfffffd806c518410) #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 73183 (syz-executor) thread 0xffff8000ffffd4c8 (459525) exclusive rrwlock inode r = 0 (0xfffffd8073687dc8) #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 (0xfffffd806c99b580) #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 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:775 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10216 11068K 11122K 166960K 11397 0 pcb 17 14K 16K 166960K 119 0 rtable 231 7K 8K 166960K 404 0 pf 38 18K 22K 166960K 70 0 ifaddr 41 7K 7K 166960K 58 0 ifgroup 59 2K 3K 166960K 90 0 sysctl 2 1K 9K 166960K 6 0 counters 72 37K 38K 166960K 92 0 ioctlops 0 0K 4K 166960K 1504 0 iov 0 0K 12K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1342 84K 85K 166960K 1443 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 10 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 250 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 196K 166960K 540 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 19 0 in_multi 88 6K 7K 166960K 105 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 529 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 231 167K 183K 166960K 4256 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 42 84K 101K 166960K 1417 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 13 0 NDP 13 0K 2K 166960K 37 0 temp 72 8675K 8739K 166960K 16482 0 kqueue 13 20K 26K 166960K 44 0 SYN cache 2 16K 16K 166960K 2 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 43 0 40 1 0 1 1 0 8 0 rtentry 176 117 0 17 6 0 6 6 0 8 1 unpcb 144 106 0 87 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 138 0 132 7 0 7 7 0 8 6 arp 136 19 0 3 1 0 1 1 0 8 0 inpcb 328 333 0 323 10 0 10 10 0 8 8 nd6 152 24 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 5 0 5 1 0 1 1 0 8 1 pppxif 1504 2 0 2 1 0 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 0 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 pfstitem 24 30 0 0 1 0 1 1 0 8 0 pfstkey 128 30 0 1 1 0 1 1 0 8 0 pfstate 448 28 0 0 4 0 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 460 0 52 29 0 29 29 0 8 0 art_table 40 462 0 52 5 0 5 5 0 8 0 art_node 32 117 0 26 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 7 0 2 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1804 0 288 96 0 96 96 0 8 0 ffsino 296 1804 0 288 117 0 117 117 0 8 0 nchpl 144 2156 0 454 64 0 64 64 0 8 0 vnodes 216 1920 0 0 107 0 107 107 0 8 0 namei 1024 7246 0 7246 1 0 1 1 0 8 1 percpumem 16 61 0 10 1 0 1 1 0 8 0 kstatmem 264 46 0 16 3 0 3 3 0 8 0 scxspl 216 7075 0 7075 3 2 1 2 1 8 1 plimitpl 152 151 0 134 1 0 1 1 0 8 0 sigapl 424 590 0 523 8 0 8 8 0 8 0 knotepl 120 299 0 0 10 0 10 10 0 8 0 kqueuepl 224 89 0 80 3 0 3 3 0 8 2 pipepl 344 130 0 101 3 0 3 3 0 8 0 fdescpl 528 554 0 523 3 0 3 3 0 8 0 filepl 160 2577 0 2355 14 0 14 14 0 8 3 lockfpl 104 54 0 51 1 0 1 1 0 8 0 lockfspl 48 25 0 22 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 205 0 192 1 0 1 1 0 8 0 zombiepl 144 525 0 523 1 0 1 1 0 8 0 processpl 1232 590 0 523 6 0 6 6 0 8 0 procpl 664 804 0 733 7 0 7 7 0 8 0 sockpl 752 489 0 456 14 2 12 14 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 159 0 0 10 0 10 10 0 8 0 bufpl 280 2686 0 132 183 0 183 183 0 8 0 anonpl 32 5613 0 0 46 0 46 46 0 246 0 amapchunkpl 152 13241 0 12794 34 0 34 34 0 158 13 amappl16 200 1965 0 1940 5 3 2 5 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 440 0 438 1 0 1 1 0 8 0 amappl12 168 933 0 891 4 1 3 3 0 8 0 amappl11 160 2 0 2 2 2 0 1 0 8 0 amappl10 152 48 0 34 1 0 1 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 50 0 48 1 0 1 1 0 8 0 amappl7 128 113 0 112 1 0 1 1 0 8 0 amappl6 120 287 0 274 1 0 1 1 0 8 0 amappl5 112 78 0 68 1 0 1 1 0 8 0 amappl4 104 439 0 408 1 0 1 1 0 8 0 amappl3 96 2113 0 2014 5 1 4 4 0 8 0 amappl2 88 553 0 493 2 0 2 2 0 8 0 amappl1 80 10193 0 9606 14 0 14 14 0 8 0 amappl 88 3465 0 3311 5 0 5 5 0 92 0 uvmvnodes 80 103 0 0 3 0 3 3 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 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 554 0 523 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 554 0 523 1 0 1 1 0 8 0 vmmpekpl 168 6576 0 6540 2 0 2 2 0 8 0 vmmpepl 168 43752 0 41875 93 0 93 93 0 357 7 vmsppl 488 553 0 523 5 0 5 5 0 8 1 rwobjpl 80 15365 0 14359 24 0 24 24 0 8 0 pdppl 4096 1116 0 1046 106 34 72 86 0 8 2 pvpl 32 12751 0 0 103 0 103 103 0 265 0 pmappl 256 553 0 523 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 286 0 36 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83807ff0) 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(800,30) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,30) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(30) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8334ebe6) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83413c02) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff800037be8090,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff800037be8090) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001499000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 end trace frame: 0xffff800037be81c0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83807ff0) 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(800,30) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,30) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(30) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8334ebe6) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83413c02) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff800037be8090,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff800037be8090) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001499000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c440030) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c440030) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800037be8240) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806be93e68,81,fffffd80097fd750,ffff80003c440030) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c5752d0,ffff80003c440030) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c5752d0,ffff80003c440030) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c5752d0,ffff80003c440030) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c5752d0,ffff80003c440030) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c440030) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c440030,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c440030,ffff800037be85b0,ffff800037be8500) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800037be85b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037be85b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74793c5776f0, count: -25 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x8e2b4cf7db0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x8e2b4cf7db0, count: -1