*cpu0: uvm_fault(0xfffffd806bee8798, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7d5b7f566af0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4a6280 rbx 0 rdx 0 rcx 0xffff800038bf07d8 rax 0x2a r8 0xffff80003c4a61b0 r9 0x1 r10 0xf906da7a43b3cf26 r11 0x69557165783ea080 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81a014c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c4a6200 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=462276 pid=98155 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2a4a58,0xffff800038bf19d8 process=0xffff8000ffff78a8 user=0xffff80003c4a1000, vmspace=0xfffffd806bdc1980 estcpu=36, cpticks=6, pctcpu=0.0, user=5, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *98155 462276 50176 0 7 0 syz-executor 98155 210258 50176 0 3 0x4000080 fsleep syz-executor 60316 461377 32641 0 3 0x80 nanoslp syz-executor 60316 45513 32641 0 3 0x4000080 fsleep syz-executor 60316 162427 32641 0 3 0x4000080 fsleep syz-executor 60316 241851 32641 0 3 0x4000080 netcon syz-executor 63179 962 36783 0 3 0x80 nanoslp syz-executor 63179 285379 36783 0 3 0x4000080 ttyout syz-executor 63179 441552 36783 0 3 0x4000080 fsleep syz-executor 13211 417321 21802 0 3 0x80 nanoslp syz-executor 13211 78679 21802 0 2 0x4000000 syz-executor 13211 48494 21802 0 3 0x4000080 fsleep syz-executor 40210 174566 93889 0 3 0x82 nanoslp syz-executor 16746 165408 93889 0 3 0x82 wait syz-executor 80690 441952 93889 0 2 0x2 syz-executor 21802 302372 93889 0 3 0x82 nanoslp syz-executor 32641 470854 93889 0 3 0x82 nanoslp syz-executor 51760 283378 1 0 3 0x100083 ttyopn getty 36783 201858 93889 0 3 0x82 nanoslp syz-executor 54968 475150 93889 0 2 0x2 syz-executor 50176 491508 93889 0 3 0x82 nanoslp syz-executor 17116 191877 0 0 3 0x14200 bored sosplice 54174 122065 87481 0 3 0x100082 sbwait ndp 87481 473271 1 0 3 0x10008a sigsusp sh 93889 411479 85426 0 3 0x82 kqread syz-executor 85426 508827 43285 0 3 0x10008a sigsusp ksh 43285 241283 8929 0 3 0x98 kqread sshd-session 8929 179640 1587 0 3 0x92 kqread sshd-session 1587 255667 1 0 3 0x88 kqread sshd 31126 84541 45817 74 3 0x1100092 bpf pflogd 45817 125122 1 0 3 0x80 sbwait pflogd 90334 135957 36843 73 3 0x1100090 kqread syslogd 36843 500458 1 0 3 0x100082 sbwait syslogd 52997 429622 1 0 3 0x100080 kqread resolvd 2386 271519 97117 77 3 0x100092 kqread dhcpleased 66190 489112 97117 77 3 0x100092 kqread dhcpleased 97117 188079 1 0 3 0x80 kqread dhcpleased 52311 434923 0 0 3 0x14200 bored smr 14944 144987 0 0 2 0x14200 zerothread 27407 354604 0 0 3 0x14200 aiodoned aiodoned 16582 306672 0 0 3 0x14200 syncer update 35774 345310 0 0 3 0x14200 cleaner cleaner 69995 368057 0 0 3 0x14200 reaper reaper 97475 427749 0 0 3 0x14200 pgdaemon pagedaemon 67132 28135 0 0 3 0x14200 bored viomb 46987 466178 0 0 3 0x40014200 acpi0 acpi0 2560 25614 0 0 3 0x40014200 idle1 12390 39994 0 0 3 0x14200 bored softnet3 47106 210615 0 0 3 0x14200 bored softnet2 85362 328732 0 0 3 0x14200 bored softnet1 28043 62709 0 0 3 0x14200 bored softnet0 77532 354304 0 0 3 0x14200 bored systqmp 83582 41850 0 0 3 0x14200 bored systq 59642 2872 0 0 3 0x14200 tmoslp softclockmp 81702 469247 0 0 3 0x40014200 tmoslp softclock 64441 22252 0 0 3 0x40014200 idle0 1 272774 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 (0xfffffd806bdc0e10) #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 98155 (syz-executor) thread 0xffff800038bf07d8 (462276) Process 80690 (syz-executor) thread 0xffff8000ffff07d0 (441952) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10246 11252K 12537K 166960K 20599 0 pcb 18 20K 21K 166960K 1106 0 rtable 197 12K 13K 166960K 1544 0 pf 42 19K 82K 166960K 399 0 ifaddr 37 7K 8K 166960K 286 0 ifgroup 72 3K 3K 166960K 527 0 sysctl 4 1K 9K 166960K 40 0 counters 70 37K 37K 166960K 644 0 ioctlops 0 0K 4K 166960K 2548 0 iov 0 0K 18K 166960K 493 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1528 96K 96K 166960K 7238 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 13K 166960K 73 0 VM map 2 1K 1K 166960K 2 0 sem 24 52K 100K 166960K 155 0 dirhash 18 3K 3K 166960K 105 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 248K 166960K 5325 0 sigio 0 0K 0K 166960K 161 0 proc 73 91K 127K 166960K 1668 0 subproc 81 5K 5K 166960K 334 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 903 0 in_multi 60 4K 7K 166960K 485 0 ether_multi 1 0K 0K 166960K 30 0 mrt 1 0K 0K 166960K 21 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 133 599K 599K 166960K 133 0 exec 0 0K 1K 166960K 1616 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 27 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 267 175K 197K 166960K 46975 0 UVM aobj 37 2K 4K 166960K 41 0 pinsyscall 45 90K 106K 166960K 7331 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 287 0 NDP 14 0K 2K 166960K 218 0 temp 83 8684K 8940K 166960K 225501 0 kqueue 14 22K 32K 166960K 922 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 120 508 0 504 5 4 1 3 0 8 0 rtentry 176 468 0 393 7 2 5 6 0 8 0 unpcb 144 3908 0 3887 29 26 3 6 0 8 2 syncache 336 63 0 63 5 4 1 1 0 8 1 tcpqe 32 23 0 23 6 5 1 1 0 8 1 tcpcb 808 1906 0 1896 27 22 5 9 0 8 3 arp 128 85 0 68 1 0 1 1 0 8 0 inpcb 384 5957 0 5940 52 45 7 16 0 8 4 nd6 144 111 0 96 2 1 1 2 0 8 0 pkpcb 40 77 0 77 7 6 1 1 0 8 1 kcovpl 48 37 0 28 1 0 1 1 0 8 0 mppekey 1024 34 0 34 2 2 0 1 0 8 0 ppxss 1192 225 0 225 5 4 1 1 0 8 1 pppxif 1504 13 0 13 6 5 1 1 0 8 1 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 24 0 12 1 0 1 1 0 482 0 pffrnode 88 23 0 11 1 0 1 1 0 8 0 pffrent 40 52 0 40 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 24 290 0 148 1 0 1 1 0 8 0 pfstkey 128 293 0 151 5 0 5 5 0 8 0 pfstate 384 293 0 151 15 0 15 15 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 4 0 4 3 2 1 1 0 8 1 art_heap8 4096 6 0 1 6 1 5 5 0 8 0 art_heap4 256 1871 0 1575 39 19 20 32 0 8 1 art_table 32 1877 0 1576 5 1 4 5 0 8 0 art_node 16 455 0 394 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 11 1 0 1 1 0 8 0 semupl 112 6 0 6 4 4 0 1 0 8 0 semapl 112 146 0 124 1 0 1 1 0 8 0 shmpl 112 38 0 4 1 0 1 1 0 8 0 dirhash 1024 80 0 59 4 1 3 4 0 8 0 dino2pl 256 10916 0 9360 99 1 98 98 0 8 0 ffsino 288 10916 0 9360 112 0 112 112 0 8 0 nchpl 144 18190 0 17578 65 40 25 65 0 8 0 rtmask 32 24 0 24 6 5 1 1 0 8 1 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 67340 0 67339 5 4 1 2 0 8 0 percpumem 16 337 0 287 1 0 1 1 0 8 0 kstatmem 264 312 0 280 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 26 0 26 9 8 1 1 0 8 1 scxspl 216 53462 0 53462 20 18 2 8 1 8 2 plimitpl 152 1316 0 1297 1 0 1 1 0 8 0 sigapl 424 5636 0 5584 10 3 7 9 0 8 0 knotepl 120 651 0 0 18 0 18 18 0 8 0 kqueuepl 224 1971 0 1961 16 15 1 5 0 8 0 pipepl 336 715 0 685 15 6 9 9 0 8 6 fdescpl 520 5587 0 5554 3 0 3 3 0 8 0 filepl 160 39333 0 39086 40 23 17 20 0 8 4 lockfpl 104 2081 0 2079 4 3 1 2 0 8 0 lockfspl 48 807 0 805 1 0 1 1 0 8 0 sessionpl 144 110 0 101 1 0 1 1 0 8 0 pgrppl 48 221 0 203 1 0 1 1 0 8 0 ucredpl 104 6660 0 6646 1 0 1 1 0 8 0 zombiepl 144 6201 0 6198 2 1 1 1 0 8 0 processpl 1208 5636 0 5584 6 1 5 6 0 8 0 procpl 656 13482 0 13422 8 1 7 7 0 8 0 srpgc 96 55 0 55 7 6 1 1 0 8 1 sosppl 168 39 0 38 3 2 1 1 0 8 0 sockpl 728 10755 0 10712 69 60 9 25 0 8 4 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 16 0 0 2 0 2 2 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 54 0 0 6 0 6 6 0 8 0 mtagpl 96 234 0 0 6 0 6 6 0 8 0 mbufpl 256 1241 0 0 75 0 75 75 0 8 0 bufpl 280 17956 0 11814 440 0 440 440 0 8 0 anonpl 32 11749 0 0 95 0 95 95 0 246 0 amapchunkpl 152 163650 0 163041 61 31 30 34 0 158 3 amappl16 200 13136 0 12986 72 51 21 21 0 8 4 amappl15 192 4 0 4 2 2 0 1 0 8 0 amappl14 184 331 0 318 1 0 1 1 0 8 0 amappl13 176 35 0 35 2 1 1 1 0 8 1 amappl12 168 6676 0 6642 3 1 2 2 0 8 0 amappl11 160 58 0 44 1 0 1 1 0 8 0 amappl10 152 9 0 8 1 0 1 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 225 0 211 1 0 1 1 0 8 0 amappl6 120 485 0 480 1 0 1 1 0 8 0 amappl5 112 226 0 216 1 0 1 1 0 8 0 amappl4 104 665 0 643 1 0 1 1 0 8 0 amappl3 96 34797 0 34672 5 1 4 4 0 8 0 amappl2 88 1504 0 1435 2 0 2 2 0 8 0 amappl1 80 45695 0 45065 21 4 17 19 0 8 1 amappl 88 44567 0 44382 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 3 0 3 3 2 1 1 0 8 1 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 10 0 10 4 4 0 1 0 8 0 dma128 128 258 0 258 5 5 0 1 0 8 0 dma64 64 10 0 10 4 4 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 40 0 4 1 0 1 1 0 8 0 uaddrrnd 24 5587 0 5554 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5587 0 5554 1 0 1 1 0 8 0 vmmpekpl 168 41656 0 41591 4 0 4 4 0 8 0 vmmpepl 168 362943 0 360703 141 31 110 110 0 357 1 vmsppl 480 5586 0 5554 5 0 5 5 0 8 0 rwobjpl 72 97652 0 90559 138 4 134 134 0 8 0 pdppl 4096 11182 0 11108 164 88 76 82 0 8 2 pvpl 32 20464 0 0 164 0 164 164 0 265 0 pmappl 256 5586 0 5554 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 594 0 156 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838b8ff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,29) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(29) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(29) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff83402d03) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a2072) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80003c499f40,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80003c499f40) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c49a020, count: 0 ddb{0}> trace x86_ipi_db(ffffffff838b8ff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,29) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(29) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(29) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff83402d03) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a2072) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80003c499f40,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80003c499f40) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000015af000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(21e5f,3,2000,ffff80002a2a4a58) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,3,2000,ffff80002a2a4a58) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c49a0f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806e747360,3,fffffd807f7d3478,ffff80002a2a4a58) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806cca00b8,ffff80002a2a4a58) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806cca00b8,ffff80002a2a4a58) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806cca00b8,ffff80002a2a4a58) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806cca00b8,ffff80002a2a4a58) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a2a4a58) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002a2a4a58,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80002a2a4a58,ffff80003c49a460,ffff80003c49a3b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c49a460) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c49a460) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x705f7d71cd10, count: -26 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: 0x7d5b7f566af0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7d5b7f566af0, count: -1