*cpu1: uvm_fault(0xfffffd807eb8cb40, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x717ee119c2e0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c4342f0 rbx 0 rdx 0 rcx 0xffff80002a2f67e8 rax 0x2a r8 0xffff80003c434220 r9 0xee3a2e1a001 r10 0xbc775d77b28a37ee r11 0x24a80e6d55aa44f2 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff812a34c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c434270 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=510910 pid=28873 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2f79d8,0xffff8000337f2f98 process=0xffff80003c46af58 user=0xffff80003c42f000, vmspace=0xfffffd8069217b68 estcpu=36, cpticks=1, pctcpu=0.1, user=3, sys=89, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 6714 459292 28717 0 3 0x400080 nanoslp syz-executor 6714 190671 28717 0 3 0x4400080 lockf syz-executor 6714 136198 28717 0 3 0x4400080 fsleep syz-executor 6714 178690 28717 0 3 0x4400080 fsleep syz-executor 63792 361213 28981 0 3 0x90 nanoslp syz-executor 63792 522732 28981 0 3 0x4000090 kqsel syz-executor 63792 415738 28981 0 3 0x4000090 fsleep syz-executor 85554 255038 84041 0 3 0x80 nanoslp syz-executor 85554 425133 84041 0 3 0x4000080 sbwait syz-executor 85554 265749 84041 0 3 0x4000080 fsleep syz-executor 28498 364289 0 0 3 0x14200 acct acct 41742 287218 81155 0 3 0x2 biowait syz-executor 60402 98356 0 0 3 0x14280 nfsidl nfsio 70094 276446 0 0 3 0x14280 nfsidl nfsio 2873 479605 0 0 3 0x14280 nfsidl nfsio 79077 85862 0 0 3 0x14280 nfsidl nfsio 97740 55158 0 0 3 0x14280 nfsidl nfsio 19210 377001 0 0 3 0x14280 nfsidl nfsio 43783 407906 0 0 3 0x14280 nfsidl nfsio 86661 256670 0 0 3 0x14280 nfsidl nfsio 5700 238656 0 0 3 0x14280 nfsidl nfsio 5488 212739 0 0 3 0x14280 nfsidl nfsio 55584 315979 0 0 3 0x14280 nfsidl nfsio 76627 95218 0 0 3 0x14280 nfsidl nfsio 40710 111268 0 0 3 0x14280 nfsidl nfsio 66668 432393 0 0 3 0x14280 nfsidl nfsio 31056 384986 0 0 3 0x14280 nfsidl nfsio 44214 486828 0 0 3 0x14280 nfsidl nfsio 89690 138394 0 0 3 0x14280 nfsidl nfsio 88715 408443 0 0 3 0x14280 nfsidl nfsio 52962 176879 0 0 3 0x14280 nfsidl nfsio 97072 330025 0 0 3 0x14280 nfsidl nfsio 84041 96375 81155 0 3 0x82 nanoslp syz-executor 28981 460496 81155 0 3 0x82 nanoslp syz-executor 48069 136640 81155 0 3 0x82 nanoslp syz-executor *28873 510910 81155 0 7 0x2 syz-executor 76285 93753 1 0 3 0x100083 ttyin getty 11160 28549 81155 0 3 0x2 biowait syz-executor 37601 498136 0 0 3 0x14200 bored sosplice 28717 141796 81155 0 3 0x82 nanoslp syz-executor 81155 497353 34001 0 3 0x82 wait syz-executor 34001 201200 18391 0 3 0x10008a sigsusp ksh 18391 112670 11889 0 3 0x98 kqread sshd-session 11889 398865 81577 0 3 0x92 kqread sshd-session 81577 456973 1 0 3 0x88 kqread sshd 73918 99264 97982 74 3 0x1100092 bpf pflogd 97982 233236 1 0 3 0x80 sbwait pflogd 81770 271398 54408 73 3 0x1100090 kqread syslogd 54408 89650 1 0 3 0x100082 sbwait syslogd 41207 521296 1 0 3 0x100080 kqread resolvd 56334 87806 49601 77 3 0x100092 kqread dhcpleased 17442 466228 49601 77 3 0x100092 kqread dhcpleased 49601 427178 1 0 3 0x80 kqread dhcpleased 87220 268559 0 0 3 0x14200 bored smr 78173 400321 0 0 2 0x14200 zerothread 46858 116689 0 0 3 0x14200 aiodoned aiodoned 2099 240033 0 0 3 0x14200 syncer update 24825 422793 0 0 3 0x14200 cleaner cleaner 82314 278928 0 0 3 0x14200 reaper reaper 8995 477683 0 0 3 0x14200 pgdaemon pagedaemon 20545 342553 0 0 3 0x14200 bored viomb 33166 277260 0 0 3 0x40014200 acpi0 acpi0 52524 489371 0 0 3 0x40014200 idle1 72646 460194 0 0 3 0x14200 bored softnet3 28098 122894 0 0 3 0x14200 bored softnet2 83053 64780 0 0 3 0x14200 bored softnet1 59981 161367 0 0 3 0x14200 bored softnet0 60712 87635 0 0 3 0x14200 bored systqmp 10892 483587 0 0 3 0x14200 bored systq 97600 486307 0 0 3 0x14200 tmoslp softclockmp 78358 387739 0 0 3 0x40014200 tmoslp softclock 31111 18937 0 0 3 0x40014200 idle0 1 355722 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 (0xfffffd806be11210) #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_extract+0xac sys/arch/amd64/amd64/pmap.c:1572 #4 uvm_fault_upper_lookup+0x20b sys/uvm/uvm_fault.c:1003 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:682 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 41742 (syz-executor) thread 0xffff80002a2f6038 (287218) Process 28873 (syz-executor) thread 0xffff80002a2f67e8 (510910) Process 11160 (syz-executor) thread 0xffff8000337f2a68 (28549) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10257 11211K 12366K 166960K 17640 0 pcb 17 15K 17K 166960K 1068 0 rtable 237 12K 12K 166960K 1776 0 pf 38 18K 81K 166960K 372 0 ifaddr 43 9K 9K 166960K 329 0 ifgroup 59 2K 2K 166960K 511 0 sysctl 4 1K 9K 166960K 23 0 counters 68 36K 37K 166960K 506 0 ioctlops 0 0K 4K 166960K 2245 0 iov 0 0K 28K 166960K 333 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1548 97K 98K 166960K 5490 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 4 9K 13K 166960K 74 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 442 0 dirhash 15 2K 3K 166960K 96 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 49K 89K 166960K 4481 0 sigio 0 0K 0K 166960K 88 0 proc 72 91K 128K 166960K 1909 0 subproc 72 4K 4K 166960K 364 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 651 0 in_multi 94 6K 7K 166960K 615 0 ether_multi 1 0K 0K 166960K 48 0 mrt 1 0K 0K 166960K 19 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 1631 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 41 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 238 181K 197K 166960K 42545 0 UVM aobj 19 4K 4K 166960K 21 0 pinsyscall 39 78K 104K 166960K 6403 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 210 0 NDP 15 0K 2K 166960K 236 0 temp 76 8672K 8928K 166960K 169785 0 kqueue 14 22K 34K 166960K 821 0 SYN cache 2 10K 18K 166960K 3 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 120 406 0 403 3 2 1 2 0 8 0 rtentry 176 564 0 467 6 0 6 6 0 8 0 unpcb 144 3606 0 3589 34 33 1 9 0 8 0 syncache 336 6 0 6 4 4 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 808 1697 0 1692 52 44 8 8 0 8 7 arp 128 94 0 77 1 0 1 1 0 8 0 inpcb 384 5227 0 5217 79 71 8 14 0 8 6 nd6 144 133 0 104 2 0 2 2 0 8 0 pkpcb 40 49 0 49 7 6 1 1 0 8 1 kcovpl 48 40 0 32 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 2 0 1 0 8 0 ppxss 1192 148 0 148 6 5 1 1 0 8 1 pppxif 1504 45 0 45 8 8 0 1 0 8 0 pffrag 232 22 0 14 1 0 1 1 0 482 0 pffrnode 88 19 0 11 1 0 1 1 0 8 0 pffrent 40 39 0 31 2 1 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 2 0 0 1 0 1 1 0 8 0 pfstitem 24 262 0 186 1 0 1 1 0 8 0 pfstkey 128 262 0 186 4 0 4 4 0 8 0 pfstate 384 262 0 186 11 1 10 11 0 8 0 pfrule 1344 25 0 17 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 2355 0 1894 45 16 29 31 0 8 0 art_table 32 2357 0 1894 4 0 4 4 0 8 0 art_node 16 535 0 452 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 15 1 0 1 1 0 8 0 semupl 112 3 0 3 3 3 0 1 0 8 0 semapl 112 431 0 421 1 0 1 1 0 8 0 shmpl 112 18 0 2 1 0 1 1 0 8 0 dirhash 1024 73 0 54 3 0 3 3 0 8 0 dino2pl 256 9453 0 7885 99 0 99 99 0 8 0 ffsino 288 9453 0 7885 113 0 113 113 0 8 0 nchpl 144 15415 0 14718 65 38 27 64 0 8 0 rtmask 32 11 0 11 4 4 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 59331 0 59329 6 5 1 2 0 8 0 percpumem 16 268 0 219 1 0 1 1 0 8 0 kstatmem 264 310 0 280 3 0 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 23 0 23 11 11 0 1 0 8 0 scxspl 216 45001 0 44998 15 14 1 8 1 8 0 plimitpl 152 906 0 889 1 0 1 1 0 8 0 sigapl 424 4774 0 4706 12 3 9 9 0 8 0 knotepl 120 806 0 0 25 0 25 25 0 8 0 kqueuepl 224 1553 0 1541 17 16 1 5 0 8 0 pipepl 336 619 0 592 10 7 3 8 0 8 0 fdescpl 520 4700 0 4672 3 0 3 3 0 8 0 filepl 160 33821 0 33595 54 40 14 19 0 8 3 lockfpl 104 1463 0 1458 2 1 1 2 0 8 0 lockfspl 48 602 0 599 1 0 1 1 0 8 0 sessionpl 144 57 0 48 1 0 1 1 0 8 0 pgrppl 48 155 0 138 1 0 1 1 0 8 0 ucredpl 104 5824 0 5810 1 0 1 1 0 8 0 zombiepl 144 6459 0 6457 3 2 1 1 0 8 0 processpl 1208 4774 0 4706 6 0 6 6 0 8 0 procpl 656 11795 0 11720 8 0 8 8 0 8 0 srpgc 96 29 0 29 7 6 1 1 0 8 1 sosppl 168 27 0 27 9 8 1 1 0 8 1 sockpl 728 9382 0 9352 103 94 9 21 0 8 5 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 41 0 0 5 0 5 5 0 8 0 mtagpl 96 186 0 0 5 0 5 5 0 8 0 mbufpl 256 4529 0 0 281 0 281 281 0 8 0 bufpl 280 11301 0 5159 440 0 440 440 0 8 0 anonpl 32 11204 0 0 91 1 90 91 0 246 0 amapchunkpl 152 142168 0 141632 82 49 33 37 0 158 7 amappl16 200 8393 0 8357 72 60 12 19 0 8 5 amappl15 192 6 0 6 3 3 0 1 0 8 0 amappl14 184 179 0 167 1 0 1 1 0 8 0 amappl13 176 9 0 9 2 2 0 1 0 8 0 amappl12 168 5858 0 5830 4 1 3 3 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 27 0 23 1 0 1 1 0 8 0 amappl7 128 264 0 251 1 0 1 1 0 8 0 amappl6 120 497 0 493 1 0 1 1 0 8 0 amappl5 112 256 0 246 1 0 1 1 0 8 0 amappl4 104 417 0 396 1 0 1 1 0 8 0 amappl3 96 29295 0 29195 5 1 4 4 0 8 0 amappl2 88 1093 0 1029 2 0 2 2 0 8 0 amappl1 80 28047 0 27461 14 1 13 14 0 8 0 amappl 88 40505 0 40343 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 12 0 12 6 5 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 20 0 2 1 0 1 1 0 8 0 uaddrrnd 24 4700 0 4672 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4700 0 4672 1 0 1 1 0 8 0 vmmpekpl 168 34211 0 34145 4 0 4 4 0 8 0 vmmpepl 168 289606 0 287722 159 63 96 103 0 357 4 vmsppl 480 4699 0 4672 6 1 5 5 0 8 0 rwobjpl 72 73434 0 66552 144 15 129 132 0 8 1 pdppl 4096 9408 0 9344 164 90 74 84 0 8 10 pvpl 32 19250 0 0 155 0 155 155 0 265 0 pmappl 256 4699 0 4672 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 817 0 176 19 0 19 19 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: 0x717ee119c2e0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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(800,74) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,74) at comcnputc+0xd0 sys/dev/ic/com.c:1259 cnputc(74) at cnputc+0x61 sys/dev/cons.c:218 kputchar(74,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 printf(ffffffff83440b16) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff800030c73b90,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:457 kerntrap(ffff800030c73b90) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001651000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(31e5f,1,2000,ffff80003c4779d0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,1,2000,ffff80003c4779d0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 end trace frame: 0xffff800030c73d30, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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(800,74) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,74) at comcnputc+0xd0 sys/dev/ic/com.c:1259 cnputc(74) at cnputc+0x61 sys/dev/cons.c:218 kputchar(74,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 printf(ffffffff83440b16) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff800030c73b90,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:457 kerntrap(ffff800030c73b90) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001651000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(31e5f,1,2000,ffff80003c4779d0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,1,2000,ffff80003c4779d0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800030c73d40) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806be16d00,1,fffffd807f7d34e0,ffff80003c4779d0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bde8218,ffff80003c4779d0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bde8218,ffff80003c4779d0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806bde8218,ffff80003c4779d0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806bde8218,ffff80003c4779d0) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4779d0) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4779d0,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c4779d0,ffff800030c740b0,ffff800030c74000) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800030c740b0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800030c740b0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b6c3d98e120, count: -24