*cpu0: uvm_fault(0xffffffff8353da28, 0xffff800027c52088, 0, 1) -> d ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x760de13ce8e0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a0b4530 rbx 0 rdx 0 rcx 0xffff8000371bf1f8 rax 0x2a r8 0xffff80002a0b4460 r9 0x1 r10 0xbf86b511fc7ef0bc r11 0x4a2e22852adc2158 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff824554c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a0b44b0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=187549 pid=23838 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371be7d8,0xffff8000371bef80 process=0xffff800029fe9fc0 user=0xffff80002a0af000, vmspace=0xfffffd806acbc378 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=6, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37638 379443 93315 0 2 0 syz-executor 37638 101829 93315 0 2 0x4000000 syz-executor 73660 207119 36408 -1 2 0x10 syz-executor 73660 137170 36408 -1 3 0x4000090 fsleep syz-executor 73660 120330 36408 -1 3 0x4000090 fsleep syz-executor 73660 473783 36408 -1 3 0x4000090 fsleep syz-executor 10338 373900 65552 0 4 0x82000 syz-executor 10338 452466 65552 0 4 0x4082000 syz-executor 10338 271620 65552 0 3 0x4002000 suspend syz-executor 10338 406733 65552 0 2 0x4082000 syz-executor 72880 118252 73412 0 2 0 syz-executor 72880 284117 73412 0 3 0x4000080 fsleep syz-executor 72880 190440 73412 0 3 0x4000080 fsleep syz-executor 72880 361931 73412 0 3 0x4000080 fsleep syz-executor 44106 513940 59951 0 2 0 syz-executor 44106 323390 59951 0 3 0x4000080 fsleep syz-executor 44106 265210 59951 0 3 0x4000080 fsleep syz-executor 79093 257696 2211 0 2 0 syz-executor 79093 479961 2211 0 3 0x4000080 fsleep syz-executor 19511 86705 88207 0 2 0x490 syz-executor 19511 221575 88207 0 3 0x4000090 fsleep syz-executor 19511 134969 88207 0 3 0x4000090 sbwait syz-executor 19511 463203 88207 0 3 0x4000090 fsleep syz-executor 2211 86787 61409 0 2 0x482 syz-executor *23838 187549 61409 0 7 0x2 syz-executor 36408 85766 61409 0 7 0x3 syz-executor 93315 216300 61409 0 2 0x482 syz-executor 73412 146075 61409 0 2 0x482 syz-executor 59951 67266 61409 0 2 0x482 syz-executor 88207 358041 61409 0 2 0x482 syz-executor 65552 124025 61409 0 2 0x482 syz-executor 13566 403359 1 0 3 0x100083 ttyin getty 51879 510727 0 0 3 0x14280 nfsidl nfsio 58106 438922 0 0 3 0x14280 nfsidl nfsio 83352 282869 0 0 3 0x14280 nfsidl nfsio 84309 217974 0 0 3 0x14280 nfsidl nfsio 58092 228142 0 0 3 0x14280 nfsidl nfsio 82123 350365 0 0 3 0x14280 nfsidl nfsio 37157 509231 0 0 3 0x14280 nfsidl nfsio 69286 14375 0 0 3 0x14280 nfsidl nfsio 94631 212428 0 0 3 0x14280 nfsidl nfsio 33089 146787 0 0 3 0x14280 nfsidl nfsio 38895 252107 0 0 3 0x14280 nfsidl nfsio 93044 271298 0 0 3 0x14280 nfsidl nfsio 87029 3422 0 0 3 0x14280 nfsidl nfsio 66793 523370 0 0 3 0x14280 nfsidl nfsio 8383 442669 0 0 3 0x14280 nfsidl nfsio 32826 83364 0 0 3 0x14280 nfsidl nfsio 16210 8626 0 0 3 0x14280 nfsidl nfsio 90729 511396 0 0 3 0x14280 nfsidl nfsio 67362 85580 0 0 3 0x14280 nfsidl nfsio 81700 280811 0 0 3 0x14280 nfsidl nfsio 38906 151430 0 0 3 0x14200 bored sosplice 61409 205099 93969 0 3 0x82 kqread syz-executor 93969 285198 63541 0 3 0x10008a sigsusp ksh 63541 187645 43361 0 3 0x98 kqread sshd-session 43361 296990 74834 0 3 0x92 kqread sshd-session 74834 266163 1 0 3 0x88 kqread sshd 60952 445134 6684 74 3 0x1100092 bpf pflogd 6684 403238 1 0 3 0x80 sbwait pflogd 55211 372816 67454 73 2 0x1100010 syslogd 67454 147384 1 0 3 0x100082 sbwait syslogd 90647 291094 1 0 3 0x100080 kqread resolvd 92243 1360 76101 77 3 0x100092 kqread dhcpleased 90605 65034 76101 77 3 0x100092 kqread dhcpleased 76101 1282 1 0 3 0x80 kqread dhcpleased 90236 22662 0 0 3 0x14200 bored smr 61573 271182 0 0 2 0x14200 zerothread 76554 407775 0 0 3 0x14200 aiodoned aiodoned 75239 25066 0 0 3 0x14200 syncer update 28864 312858 0 0 3 0x14200 cleaner cleaner 67097 366805 0 0 3 0x14200 reaper reaper 2113 55215 0 0 3 0x14200 pgdaemon pagedaemon 97693 357639 0 0 3 0x14200 bored viomb 15138 235577 0 0 3 0x40014200 acpi0 acpi0 34886 298125 0 0 3 0x40014200 idle1 88314 304253 0 0 3 0x14200 bored softnet3 61787 234109 0 0 3 0x14200 bored softnet2 41772 254581 0 0 3 0x14200 bored softnet1 57170 465645 0 0 3 0x14200 bored softnet0 11622 262346 0 0 3 0x14200 bored systqmp 51102 92248 0 0 3 0x14200 bored systq 30771 40913 0 0 3 0x14200 tmoslp softclockmp 15826 87568 0 0 2 0x40014200 softclock 36170 421594 0 0 3 0x40014200 idle0 1 370379 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex anonpl r = 0 (0xffffffff8362bf80) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x103 sys/kern/subr_pool.c:579 #4 uvm_analloc+0x36 sys/uvm/uvm_anon.c:63 #5 uvm_fault_lower+0x20f sys/uvm/uvm_fault.c:1390 #6 uvm_fault+0x301 sys/uvm/uvm_fault.c:637 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 23838 (syz-executor) thread 0xffff8000371bf1f8 (187549) exclusive rwlock amaplk r = 0 (0xfffffd8076511b00) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 uvm_fault_check+0x521 sys/uvm/uvm_fault.c:782 #2 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #4 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806acbc468) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 #2 uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 #3 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 exclusive mutex anonpl r = 0 (0xffffffff8362bf80) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x103 sys/kern/subr_pool.c:579 #4 uvm_analloc+0x36 sys/uvm/uvm_anon.c:63 #5 uvm_fault_lower+0x20f sys/uvm/uvm_fault.c:1390 #6 uvm_fault+0x301 sys/uvm/uvm_fault.c:637 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 36408 (syz-executor) thread 0xffff8000371be7d8 (85766) exclusive rrwlock inode r = 0 (0xfffffd806acd5a30) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ktrwriteraw+0x172 sys/kern/kern_ktrace.c:679 #7 ktrsyscall+0x31d sys/kern/kern_ktrace.c:182 #8 syscall+0x2eb mi_syscall sys/sys/syscall_mi.h:157 [inline] #8 syscall+0x2eb sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83628520) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 syscall+0x2cc mi_syscall sys/sys/syscall_mi.h:156 [inline] #1 syscall+0x2cc sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10199 10094K 10545K 166960K 11634 0 pcb 17 14K 16K 166960K 158 0 rtable 245 7K 7K 166960K 1098 0 pf 36 18K 18K 166960K 108 0 ifaddr 44 8K 8K 166960K 140 0 ifgroup 55 2K 2K 166960K 158 0 sysctl 1 0K 0K 166960K 1 0 counters 64 36K 36K 166960K 116 0 ioctlops 0 0K 4K 166960K 1566 0 iov 1 2K 16K 166960K 30 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1381 87K 87K 166960K 1955 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 89K 166960K 840 0 sigio 0 0K 0K 166960K 9 0 proc 72 91K 128K 166960K 1179 0 subproc 104 6K 7K 166960K 403 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 48 0 in_multi 99 7K 7K 166960K 356 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 700 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 250 73K 91K 166960K 8051 0 UVM aobj 15 2K 4K 166960K 18 0 pinsyscall 42 84K 104K 166960K 2501 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 24 0 NDP 16 0K 1K 166960K 96 0 temp 47 6816K 6883K 166960K 24847 0 kqueue 15 24K 30K 166960K 95 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 170 0 167 3 2 1 3 0 8 0 rtentry 112 371 0 257 4 0 4 4 0 8 0 unpcb 144 250 0 230 2 1 1 2 0 8 0 syncache 336 10 0 10 4 3 1 1 0 8 1 tcpqe 32 4 0 4 3 2 1 1 0 8 1 tcpcb 808 168 0 160 6 4 2 4 0 8 1 arp 120 66 0 48 1 0 1 1 0 8 0 inpcb 336 737 0 721 13 9 4 10 0 8 2 nd6 136 94 0 68 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 2 0 1 0 8 0 kcovpl 48 31 0 23 1 0 1 1 0 8 0 ppxss 1168 1 0 1 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 74 0 38 1 0 1 1 0 8 0 pfstkey 128 75 0 39 2 0 2 2 0 8 0 pfstate 376 75 0 39 4 0 4 4 0 8 0 pfrule 1344 22 0 16 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1441 0 973 31 1 30 30 0 8 0 art_table 32 1443 0 973 4 0 4 4 0 8 0 art_node 16 368 0 266 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 10 0 1 1 0 1 1 0 8 0 shmpl 112 15 0 3 1 0 1 1 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 2339 0 790 97 0 97 97 0 8 0 ffsino 272 2339 0 790 104 0 104 104 0 8 0 nchpl 144 3062 0 1342 64 0 64 64 0 8 0 uvmvnodes 80 2860 0 0 59 0 59 59 0 8 0 vnodes 216 2860 0 0 159 0 159 159 0 8 0 namei 1024 11994 0 11994 2 1 1 1 0 8 1 percpumem 16 72 0 26 1 0 1 1 0 8 0 kstatmem 264 76 0 52 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 19082 0 19082 11 8 3 8 1 8 3 plimitpl 152 132 0 114 1 0 1 1 0 8 0 sigapl 424 1119 0 1049 9 0 9 9 0 8 0 futexpl 64 6150 0 6139 2 1 1 1 0 8 0 knotepl 120 359 0 0 10 0 10 10 0 8 0 kqueuepl 216 125 0 113 1 0 1 1 0 8 0 pipepl 320 294 0 267 8 5 3 8 0 8 0 fdescpl 496 1080 0 1049 5 0 5 5 0 8 0 filepl 152 5177 0 4921 21 8 13 17 0 8 0 lockfpl 104 116 0 114 1 0 1 1 0 8 0 lockfspl 48 52 0 50 1 0 1 1 0 8 0 sessionpl 144 50 0 41 1 0 1 1 0 8 0 pgrppl 48 94 0 77 1 0 1 1 0 8 0 ucredpl 104 611 0 595 1 0 1 1 0 8 0 zombiepl 144 1049 0 1049 2 1 1 1 0 8 1 processpl 1160 1119 0 1049 6 0 6 6 0 8 0 procpl 648 1749 0 1663 9 1 8 8 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 6 0 6 3 2 1 1 0 8 1 sockpl 664 1171 0 1132 21 15 6 18 0 8 2 mcl64k 65536 3 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 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 246 0 0 31 0 31 31 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 347 0 0 19 0 19 19 0 8 0 bufpl 280 6692 0 518 442 0 442 442 0 8 0 anonpl 24 221418 0 217933 75 24 51 52 0 185 21 amapchunkpl 152 25874 0 25324 40 9 31 31 0 158 9 amappl16 200 4637 0 4620 31 29 2 14 0 8 1 amappl15 192 14 0 13 1 0 1 1 0 8 0 amappl14 184 170 0 158 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 2073 0 2042 4 2 2 3 0 8 0 amappl11 160 59 0 44 1 0 1 1 0 8 0 amappl10 152 26 0 26 1 1 0 1 0 8 0 amappl9 144 202 0 202 1 1 0 1 0 8 0 amappl8 136 28 0 26 1 0 1 1 0 8 0 amappl7 128 158 0 146 1 0 1 1 0 8 0 amappl6 120 379 0 378 1 0 1 1 0 8 0 amappl5 112 235 0 223 1 0 1 1 0 8 0 amappl4 104 386 0 368 1 0 1 1 0 8 0 amappl3 96 4715 0 4591 5 1 4 4 0 8 0 amappl2 88 1027 0 958 2 0 2 2 0 8 0 amappl1 80 12178 0 11604 15 0 15 15 0 8 1 amappl 88 7468 0 7279 5 0 5 5 0 92 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 8 0 8 2 2 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 17 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1080 0 1049 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1080 0 1049 1 0 1 1 0 8 0 vmmpekpl 168 10700 0 10651 3 0 3 3 0 8 0 vmmpepl 168 74334 0 72459 108 18 90 96 0 357 5 vmsppl 440 1079 0 1049 6 2 4 5 0 8 0 rwobjpl 56 27457 0 23631 59 4 55 55 0 8 0 pdppl 4096 2167 0 2098 129 54 75 83 0 8 6 pvpl 32 29312 0 0 236 0 236 236 0 265 0 pmappl 248 1079 0 1049 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 449 0 74 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834f4ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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:654 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+0x61 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8309367f) at db_printf+0x9b fault(ffffffff8303e9bb) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a0c28e0,ffff800027c52088) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a0c28e0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b ffs2_balloc(fffffd806acd5998,7668b,68,fffffd807f7d33a8,1,ffff80002a0c2b58) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 end trace frame: 0xffff80002a0c2bd0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff834f4ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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:654 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+0x61 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8309367f) at db_printf+0x9b fault(ffffffff8303e9bb) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a0c28e0,ffff800027c52088) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a0c28e0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b ffs2_balloc(fffffd806acd5998,7668b,68,fffffd807f7d33a8,1,ffff80002a0c2b58) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a0c2be0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806b988a80,ffff80002a0c2c98,3,fffffd807f7d33a8) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000371be7d8,fffffd806b988a80,fffffd807f7d33a8,ffff80002a0c2d60,ffff80002a0c2d40) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrsyscall(ffff8000371be7d8,b,20,ffff80002a0c2ef0) at ktrsyscall+0x31d sys/kern/kern_ktrace.c:182 syscall(ffff80002a0c2ef0) at syscall+0x2eb mi_syscall sys/sys/syscall_mi.h:157 [inline] syscall(ffff80002a0c2ef0) at syscall+0x2eb sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7115e4895ad0, count: -20 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x760de13ce8e0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x760de13ce8e0, count: -1