*cpu0: uvm_fault(0xfffffd806bdb17a0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xbd831c18dc0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000377dbe80 rbx 0 rdx 0 rcx 0xffff800039bff738 rax 0x2a r8 0xffff8000377dbdb0 r9 0x1 r10 0x409daab4d394dea5 r11 0x9cc1a0c88b5bb857 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff812a34c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff8000377dbe00 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=201600 pid=1407 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800039bfe2b8,0xffff80003b40e7f8 process=0xffff800039c025e0 user=0xffff8000377d6000, vmspace=0xfffffd806bdb1200 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 35705 297111 98005 0 2 0 syz-executor 1407 437892 92124 0 2 0 syz-executor * 1407 201600 92124 0 7 0x4000000 syz-executor 26291 373300 68944 0 2 0 syz-executor 26291 132115 68944 0 3 0x4000080 kqread syz-executor 47002 208870 17705 60928 2 0x10 syz-executor 47002 20551 17705 60928 3 0x4000090 lockf syz-executor 47002 36130 17705 60928 2 0x4000010 syz-executor 7456 48468 95690 0 3 0x80 nanoslp syz-executor 7456 111857 95690 0 3 0x4000080 lockf syz-executor 7456 65009 95690 0 3 0x4000080 kqread syz-executor 7456 112592 95690 0 3 0x4000080 fsleep syz-executor 31401 506364 12652 0 3 0x80 nanoslp syz-executor 31401 40992 12652 0 3 0x4000080 kqsel syz-executor 31401 354487 12652 0 3 0x4000080 fsleep syz-executor 57500 161040 1 0 3 0x100083 ttyin getty 95690 268887 29529 0 3 0x82 nanoslp syz-executor 12652 68792 29529 0 3 0x82 nanoslp syz-executor 32711 507956 29529 0 3 0x82 nanoslp syz-executor 43749 156730 0 0 3 0x14280 nfsidl nfsio 33358 274445 0 0 3 0x14280 nfsidl nfsio 58578 439320 0 0 3 0x14280 nfsidl nfsio 2070 414204 0 0 3 0x14280 nfsidl nfsio 80133 350791 0 0 3 0x14280 nfsidl nfsio 51306 496130 0 0 3 0x14280 nfsidl nfsio 79968 52337 0 0 3 0x14280 nfsidl nfsio 7056 397333 0 0 3 0x14280 nfsidl nfsio 29737 15215 0 0 3 0x14280 nfsidl nfsio 55746 249108 0 0 3 0x14280 nfsidl nfsio 82307 238112 0 0 3 0x14280 nfsidl nfsio 27464 142331 0 0 3 0x14280 nfsidl nfsio 60541 354531 0 0 3 0x14280 nfsidl nfsio 66097 104982 0 0 3 0x14280 nfsidl nfsio 49027 92844 0 0 3 0x14280 nfsidl nfsio 94042 147900 0 0 3 0x14280 nfsidl nfsio 71134 324389 0 0 3 0x14280 nfsidl nfsio 21611 181343 0 0 3 0x14280 nfsidl nfsio 2238 9026 0 0 3 0x14280 nfsidl nfsio 96802 182792 0 0 3 0x14280 nfsidl nfsio 76931 434715 0 0 3 0x14200 bored sosplice 14576 323441 29529 0 3 0x82 nanoslp syz-executor 98005 18521 29529 0 3 0x82 nanoslp syz-executor 68944 410281 29529 0 3 0x82 nanoslp syz-executor 92124 513040 29529 0 3 0x82 nanoslp syz-executor 17705 854 29529 0 3 0x82 nanoslp syz-executor 29529 319951 31632 0 3 0x82 kqread syz-executor 31632 36631 68703 0 3 0x10008a sigsusp ksh 68703 495197 83207 0 3 0x98 kqread sshd-session 83207 328806 43792 0 3 0x92 kqread sshd-session 43792 198157 1 0 3 0x88 kqread sshd 36473 415150 89101 74 3 0x1100092 bpf pflogd 89101 513639 1 0 3 0x80 sbwait pflogd 68090 258620 34060 73 3 0x1100090 kqread syslogd 34060 195676 1 0 3 0x100082 sbwait syslogd 97106 46648 1 0 3 0x100080 kqread resolvd 42439 151990 79120 77 3 0x100092 kqread dhcpleased 83317 52589 79120 77 3 0x100092 kqread dhcpleased 79120 269520 1 0 3 0x80 kqread dhcpleased 35381 93520 0 0 3 0x14200 bored smr 37882 130764 0 0 2 0x14200 zerothread 55780 136484 0 0 3 0x14200 aiodoned aiodoned 48892 420905 0 0 3 0x14200 syncer update 71054 379476 0 0 3 0x14200 cleaner cleaner 30080 18581 0 0 3 0x14200 reaper reaper 99192 252198 0 0 3 0x14200 pgdaemon pagedaemon 89724 156143 0 0 3 0x14200 bored viomb 28503 299054 0 0 3 0x40014200 acpi0 acpi0 34254 282466 0 0 3 0x40014200 idle1 75624 433488 0 0 3 0x14200 bored softnet3 91411 97868 0 0 3 0x14200 bored softnet2 33089 124864 0 0 3 0x14200 bored softnet1 99989 228657 0 0 3 0x14200 bored softnet0 34950 420534 0 0 3 0x14200 bored systqmp 71855 498195 0 0 3 0x14200 bored systq 12368 225034 0 0 3 0x14200 tmoslp softclockmp 44585 135227 0 0 3 0x40014200 tmoslp softclock 73048 351215 0 0 3 0x40014200 idle0 1 278292 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806bdb0910) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_lower_lookup+0x3d6 sys/uvm/uvm_fault.c:-1 #5 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1370 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #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 1407 (syz-executor) thread 0xffff800039bff738 (201600) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 11126K 11427K 166960K 12757 0 pcb 18 15K 16K 166960K 190 0 rtable 250 10K 10K 166960K 892 0 pf 39 18K 81K 166960K 204 0 ifaddr 42 7K 8K 166960K 109 0 ifgroup 62 2K 3K 166960K 176 0 sysctl 4 1K 9K 166960K 11 0 counters 68 36K 37K 166960K 176 0 ioctlops 0 0K 4K 166960K 1684 0 iov 0 0K 16K 166960K 63 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1461 92K 92K 166960K 2554 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 26 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 51 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 1157 0 sigio 0 0K 0K 166960K 60 0 proc 73 91K 140K 166960K 791 0 subproc 72 4K 4K 166960K 118 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 496 0 in_multi 90 6K 7K 166960K 180 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 662 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 256 165K 176K 166960K 11911 0 UVM aobj 29 2K 2K 166960K 30 0 pinsyscall 43 86K 102K 166960K 2384 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 52 0 NDP 13 0K 2K 166960K 74 0 temp 79 8671K 8748K 166960K 48315 0 kqueue 17 28K 30K 166960K 196 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 120 234 0 231 5 2 3 3 0 8 2 rtentry 176 297 0 188 6 0 6 6 0 8 0 unpcb 144 733 0 716 4 2 2 3 0 8 1 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 270 0 262 5 3 2 2 0 8 1 arp 128 69 0 50 1 0 1 1 0 8 0 inpcb 384 984 0 970 14 9 5 8 0 8 3 nd6 144 46 0 21 2 0 2 2 0 8 0 pkpcb 40 14 0 14 3 2 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 37 0 37 3 2 1 1 0 8 1 pppxif 1504 8 0 8 4 3 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 9 0 0 1 0 1 1 0 482 0 pffrnode 88 7 0 0 1 0 1 1 0 8 0 pffrent 40 10 0 1 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 73 0 22 1 0 1 1 0 8 0 pfstkey 128 75 0 24 2 0 2 2 0 8 0 pfstate 384 73 0 23 6 0 6 6 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 781 0 359 34 6 28 30 0 8 0 art_table 32 783 0 359 4 0 4 4 0 8 0 art_node 16 292 0 199 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 10 1 0 1 1 0 8 0 semapl 112 45 0 35 1 0 1 1 0 8 0 shmpl 112 27 0 1 1 0 1 1 0 8 0 dirhash 1024 36 0 19 3 0 3 3 0 8 0 dino2pl 256 3576 0 2066 95 0 95 95 0 8 0 ffsino 288 3576 0 2066 109 0 109 109 0 8 0 nchpl 144 5082 0 3369 64 0 64 64 0 8 0 rtmask 32 6 0 6 3 2 1 1 0 8 1 uvmvnodes 80 4340 0 0 89 0 89 89 0 8 0 vnodes 216 4340 0 0 242 0 242 242 0 8 0 namei 1024 17434 0 17434 3 2 1 1 0 8 1 percpumem 16 103 0 54 1 0 1 1 0 8 0 kstatmem 264 100 0 70 5 2 3 3 0 8 0 scsiplug 72 7 0 7 3 2 1 1 0 8 1 scxspl 216 15356 0 15356 8 7 1 6 1 8 1 plimitpl 152 214 0 195 1 0 1 1 0 8 0 sigapl 424 1472 0 1401 10 1 9 9 0 8 0 knotepl 120 586 0 0 17 0 17 17 0 8 0 kqueuepl 224 429 0 414 7 4 3 5 0 8 1 pipepl 336 271 0 243 3 0 3 3 0 8 0 fdescpl 520 1431 0 1399 3 0 3 3 0 8 0 filepl 160 8841 0 8603 25 12 13 17 0 8 1 lockfpl 104 310 0 301 1 0 1 1 0 8 0 lockfspl 48 134 0 127 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 57 0 40 1 0 1 1 0 8 0 ucredpl 104 1448 0 1434 1 0 1 1 0 8 0 zombiepl 144 1403 0 1401 1 0 1 1 0 8 0 processpl 1208 1472 0 1401 6 0 6 6 0 8 0 procpl 656 3136 0 3056 8 0 8 8 0 8 0 srpgc 96 14 0 14 2 2 0 1 0 8 0 sosppl 168 9 0 9 2 2 0 1 0 8 0 sockpl 728 1989 0 1955 22 13 9 9 0 8 5 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 20 0 0 1 0 1 1 0 8 0 mbufpl 256 1131 0 0 71 0 71 71 0 8 0 bufpl 280 4283 0 130 297 0 297 297 0 8 0 anonpl 32 10023 0 0 81 0 81 81 0 246 0 amapchunkpl 152 39505 0 38892 40 4 36 36 0 158 8 amappl16 200 3318 0 3248 24 9 15 17 0 8 8 amappl15 192 45 0 45 1 1 0 1 0 8 0 amappl14 184 128 0 116 1 0 1 1 0 8 0 amappl13 176 41 0 41 1 1 0 1 0 8 0 amappl12 168 2155 0 2124 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 22 0 21 2 1 1 1 0 8 0 amappl9 144 255 0 255 1 1 0 1 0 8 0 amappl8 136 54 0 51 1 0 1 1 0 8 0 amappl7 128 123 0 110 1 0 1 1 0 8 0 amappl6 120 229 0 225 1 0 1 1 0 8 0 amappl5 112 155 0 143 1 0 1 1 0 8 0 amappl4 104 352 0 332 1 0 1 1 0 8 0 amappl3 96 7905 0 7793 5 1 4 4 0 8 0 amappl2 88 735 0 670 2 0 2 2 0 8 0 amappl1 80 13243 0 12633 16 1 15 15 0 8 0 amappl 88 10951 0 10770 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 128 256 0 256 3 3 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 29 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1431 0 1399 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1431 0 1399 1 0 1 1 0 8 0 vmmpekpl 168 12654 0 12599 3 0 3 3 0 8 0 vmmpepl 168 94655 0 92543 110 6 104 104 0 357 4 vmsppl 480 1430 0 1399 5 0 5 5 0 8 0 rwobjpl 72 29655 0 24292 102 4 98 98 0 8 0 pdppl 4096 2870 0 2798 110 38 72 86 0 8 0 pvpl 32 17884 0 0 145 0 145 145 0 265 0 pmappl 256 1430 0 1399 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 467 0 53 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83889ff0) 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:654 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+0x61 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x524 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x524 sys/ddb/db_output.c:153 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8340363e) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a2569) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a342a10,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a342a10) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000146b000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 end trace frame: 0xffff80002a342b40, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83889ff0) 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:654 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+0x61 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x524 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x524 sys/ddb/db_output.c:153 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8340363e) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a2569) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a342a10,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a342a10) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000146b000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,1,2000,ffff80002a287498) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80002a287498) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a342bc0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c3d9e88,1,fffffd807f7d3410,ffff80002a287498) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bedf718,ffff80002a287498) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bedf718,ffff80002a287498) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806bedf718,ffff80002a287498) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806bedf718,ffff80002a287498) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a287498) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002a287498,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80002a287498,ffff80002a342f30,ffff80002a342e80) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a342f30) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a342f30) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72cbbf526bd0, count: -25 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: 0xbd831c18dc0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xbd831c18dc0, count: -1