*cpu1: uvm_fault(0xfffffd807611f9a8, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7941a88f2640, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c475990 rbx 0 rdx 0 rcx 0xffff80003c441c60 rax 0x2a r8 0xffff80003c4758c0 r9 0 r10 0xe65874d1fc3c8e92 r11 0x2fc0ef9324d0cb97 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82cd04c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c475910 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=127688 pid=17088 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4402c0,0xffff80003c4407f0 process=0xffff8000358170e0 user=0xffff80003c470000, vmspace=0xfffffd807611f020 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *17088 127688 35862 0 7 0 syz-executor 17088 240042 35862 0 3 0x4000080 fsleep syz-executor 36952 129445 63375 0 3 0x80 nanoslp syz-executor 36952 102488 63375 0 3 0x4000080 kqsel syz-executor 36952 212563 63375 0 3 0x4000080 fsleep syz-executor 91440 399586 55068 0 3 0x82 wait syz-executor 54264 124024 1 0 3 0x100083 ttyin getty 91337 503213 0 0 3 0x14280 nfsidl nfsio 37434 340078 0 0 3 0x14280 nfsidl nfsio 26594 54328 0 0 3 0x14280 nfsidl nfsio 6695 52048 0 0 3 0x14280 nfsidl nfsio 30312 149695 0 0 3 0x14280 nfsidl nfsio 83859 403640 0 0 3 0x14280 nfsidl nfsio 27161 251758 0 0 3 0x14280 nfsidl nfsio 67166 321678 0 0 3 0x14280 nfsidl nfsio 25624 80203 0 0 3 0x14280 nfsidl nfsio 89170 61980 0 0 3 0x14280 nfsidl nfsio 20194 324125 0 0 3 0x14280 nfsidl nfsio 13950 220690 0 0 3 0x14280 nfsidl nfsio 45193 294200 0 0 3 0x14280 nfsidl nfsio 95205 270736 0 0 3 0x14280 nfsidl nfsio 40805 181194 0 0 3 0x14280 nfsidl nfsio 61414 69067 0 0 3 0x14280 nfsidl nfsio 56278 447862 0 0 3 0x14280 nfsidl nfsio 39964 396067 0 0 3 0x14280 nfsidl nfsio 71070 106838 0 0 3 0x14280 nfsidl nfsio 39714 373761 0 0 3 0x14280 nfsidl nfsio 34315 51695 0 0 3 0x14200 bored sosplice 35862 314199 55068 0 3 0x82 nanoslp syz-executor 34673 147884 55068 0 3 0x82 wait syz-executor 51106 451143 55068 0 3 0x82 nanoslp syz-executor 97334 50132 55068 0 3 0x82 nanoslp syz-executor 50430 431066 55068 0 3 0x82 nanoslp syz-executor 63375 427952 55068 0 2 0x2 syz-executor 93428 359629 55068 0 2 0x2 syz-executor 55068 249987 59428 0 3 0x82 kqread syz-executor 59428 38429 43980 0 3 0x10008a sigsusp ksh 43980 270420 79313 0 3 0x98 kqread sshd-session 79313 146492 94776 0 3 0x92 kqread sshd-session 94776 109970 1 0 3 0x88 kqread sshd 89866 224353 29034 74 3 0x1100092 bpf pflogd 29034 86590 1 0 3 0x80 sbwait pflogd 95757 79110 55266 73 3 0x1100090 kqread syslogd 55266 496 1 0 3 0x100082 sbwait syslogd 20798 392437 1 0 3 0x100080 kqread resolvd 60621 393830 95886 77 3 0x100092 kqread dhcpleased 78768 163121 95886 77 3 0x100092 kqread dhcpleased 95886 84344 1 0 3 0x80 kqread dhcpleased 1789 318714 0 0 3 0x14200 bored smr 74862 235473 0 0 3 0x14200 pgzero zerothread 54828 481046 0 0 3 0x14200 aiodoned aiodoned 95305 267857 0 0 3 0x14200 syncer update 13418 362704 0 0 3 0x14200 cleaner cleaner 94313 149077 0 0 3 0x14200 reaper reaper 25664 117745 0 0 3 0x14200 pgdaemon pagedaemon 36796 91138 0 0 3 0x14200 bored viomb 72750 240770 0 0 3 0x40014200 acpi0 acpi0 84747 129849 0 0 3 0x40014200 idle1 80301 452352 0 0 3 0x14200 bored softnet7 70926 116787 0 0 3 0x14200 bored softnet6 36925 348809 0 0 3 0x14200 bored softnet5 81316 198753 0 0 3 0x14200 bored softnet4 10047 266576 0 0 3 0x14200 bored softnet3 72191 129726 0 0 3 0x14200 bored softnet2 31707 477887 0 0 3 0x14200 bored softnet1 91012 335642 0 0 3 0x14200 bored softnet0 63006 330939 0 0 3 0x14200 smrbar systqmp 77304 114626 0 0 3 0x14200 bored systq 18817 101736 0 0 3 0x14200 tmoslp softclockmp 1690 182779 0 0 3 0x40014200 tmoslp softclock 46413 439707 0 0 3 0x40014200 idle0 1 106843 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff838d93c0) #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+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 uvm_fault_lower+0x675 sys/uvm/uvm_fault.c:1572 #4 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 Process 17088 (syz-executor) thread 0xffff80003c441c60 (127688) Process 63006 (systqmp) thread 0xffff8000ffffe520 (330939) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10223 11154K 11573K 166960K 13636 0 pcb 17 15K 17K 166960K 360 0 rtable 224 10K 11K 166960K 464 0 pf 39 18K 82K 166960K 258 0 ifaddr 43 8K 8K 166960K 123 0 ifgroup 57 2K 2K 166960K 203 0 sysctl 4 1K 9K 166960K 18 0 counters 70 37K 38K 166960K 246 0 ioctlops 0 0K 4K 166960K 1989 0 iov 0 0K 28K 166960K 110 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1503 95K 96K 166960K 2880 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 55 0 dirhash 12 2K 3K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1476 0 sigio 0 0K 0K 166960K 16 0 proc 72 115K 164K 166960K 742 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 170 0 in_multi 97 7K 7K 166960K 171 0 ether_multi 1 0K 0K 166960K 9 0 mrt 1 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 510 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 257 163K 178K 166960K 14850 0 UVM aobj 64 3K 3K 166960K 68 0 pinsyscall 43 86K 100K 166960K 2598 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 56 0 NDP 13 0K 2K 166960K 87 0 temp 82 8684K 8938K 166960K 58348 0 kqueue 13 20K 29K 166960K 289 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 120 266 0 263 3 0 3 3 0 8 2 rtentry 176 145 0 57 5 0 5 5 0 8 0 unpcb 144 852 0 832 4 3 1 4 0 8 0 syncache 336 6 0 6 2 2 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 522 0 515 15 11 4 7 0 8 2 arp 128 15 0 4 1 0 1 1 0 8 0 inpcb 328 1672 0 1659 10 5 5 7 0 8 2 nd6 144 24 0 6 1 0 1 1 0 8 0 pkpcb 40 11 0 11 1 1 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 5 0 5 2 2 0 1 0 8 0 ppxss 1192 75 0 74 2 1 1 1 0 8 0 pppxif 1504 8 0 8 1 1 0 1 0 8 0 pffrag 232 10 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 0 1 0 1 1 0 8 0 pffrent 40 15 0 7 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 0 1 1 0 8 1 pfanchor 1288 2 0 2 1 1 0 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 157 0 61 1 0 1 1 0 8 0 pfstkey 128 157 0 63 4 0 4 4 0 8 0 pfstate 384 154 0 61 11 1 10 11 0 8 0 pfrule 1344 82 0 76 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 693 0 258 30 1 29 29 0 8 0 art_table 40 696 0 258 5 0 5 5 0 8 0 art_node 32 144 0 68 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 10 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 50 0 40 1 0 1 1 0 8 0 shmpl 112 65 0 4 2 0 2 2 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 4097 0 2588 96 0 96 96 0 8 0 ffsino 296 4097 0 2588 118 0 118 118 0 8 0 nchpl 144 6049 0 4348 64 0 64 64 0 8 0 rtmask 32 15 0 15 2 1 1 1 0 8 1 uvmvnodes 80 5153 0 0 106 0 106 106 0 8 0 vnodes 216 5153 0 0 287 0 287 287 0 8 0 namei 1024 21593 0 21593 2 1 1 2 0 8 1 percpumem 16 138 0 88 1 0 1 1 0 8 0 kstatmem 264 134 0 106 4 1 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 37497 0 37497 12 9 3 6 1 8 3 plimitpl 152 254 0 237 1 0 1 1 0 8 0 sigapl 424 1775 0 1700 9 0 9 9 0 8 0 knotepl 120 532 0 0 17 0 17 17 0 8 0 kqueuepl 224 514 0 503 2 0 2 2 0 8 1 pipepl 344 335 0 308 12 9 3 9 0 8 0 fdescpl 528 1730 0 1698 3 0 3 3 0 8 0 filepl 160 11664 0 11438 20 6 14 16 0 8 2 lockfpl 104 1214 0 1212 3 2 1 2 0 8 0 lockfspl 48 385 0 383 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 88 0 71 1 0 1 1 0 8 0 ucredpl 104 1530 0 1516 1 0 1 1 0 8 0 zombiepl 144 1706 0 1700 1 0 1 1 0 8 0 processpl 1248 1775 0 1700 6 0 6 6 0 8 0 procpl 656 4100 0 4022 8 0 8 8 0 8 0 sosppl 168 14 0 14 3 2 1 1 0 8 1 sockpl 752 2838 0 2802 21 7 14 14 0 8 9 mcl64k 65536 4 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 22 0 0 2 0 2 2 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 49 0 0 2 0 2 2 0 8 0 mbufpl 256 294 0 0 18 0 18 18 0 8 0 bufpl 280 17017 0 10875 440 0 440 440 0 8 0 anonpl 32 11667 0 0 95 0 95 95 0 246 0 amapchunkpl 152 56545 0 56007 57 21 36 37 0 158 14 amappl16 200 7521 0 7488 36 23 13 24 0 8 1 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 126 0 114 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 2407 0 2375 3 1 2 2 0 8 0 amappl11 160 65 0 50 1 0 1 1 0 8 0 amappl10 152 3 0 3 2 1 1 1 0 8 1 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 29 0 26 1 0 1 1 0 8 0 amappl7 128 122 0 110 1 0 1 1 0 8 0 amappl6 120 196 0 193 1 0 1 1 0 8 0 amappl5 112 130 0 118 1 0 1 1 0 8 0 amappl4 104 323 0 301 1 0 1 1 0 8 0 amappl3 96 10179 0 10057 4 0 4 4 0 8 0 amappl2 88 682 0 619 2 0 2 2 0 8 0 amappl1 80 14252 0 13636 17 2 15 15 0 8 0 amappl 88 13901 0 13721 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 255 0 255 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 67 0 4 2 0 2 2 0 8 0 uaddrrnd 24 1731 0 1699 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1731 0 1699 1 0 1 1 0 8 0 vmmpekpl 168 15669 0 15632 3 0 3 3 0 8 0 vmmpepl 168 114710 0 112625 114 16 98 109 0 357 0 vmsppl 488 1730 0 1699 6 1 5 5 0 8 0 rwobjpl 80 37706 0 31519 131 4 127 127 0 8 0 pdppl 4096 3469 0 3398 99 28 71 81 0 8 0 pvpl 32 19934 0 0 161 0 161 161 0 265 0 pmappl 256 1730 0 1699 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 301 0 48 8 0 8 8 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: 0x7941a88f2640, 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(800,20) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x524 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x524 sys/ddb/db_output.c:153 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8340f420) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833b24cd) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003a028a70,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:294 kerntrap(ffff80003a028a70) at kerntrap+0x13c sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001563000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 end trace frame: 0xffff80003a028ba0, 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(800,20) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x524 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x524 sys/ddb/db_output.c:153 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8340f420) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833b24cd) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003a028a70,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:294 kerntrap(ffff80003a028a70) at kerntrap+0x13c sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001563000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(31e5f,81,2000,ffff80003c4402c0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,81,2000,ffff80003c4402c0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003a028c20) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b5e5a20,81,fffffd80097fb7b8,ffff80003c4402c0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b0fd4e8,ffff80003c4402c0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b0fd4e8,ffff80003c4402c0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b0fd4e8,ffff80003c4402c0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806b0fd4e8,ffff80003c4402c0) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4402c0) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4402c0,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c4402c0,ffff80003a028f90,ffff80003a028ee0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003a028f90) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a028f90) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7110449927e0, count: -25