*cpu0: uvm_fault(0xfffffd805d3ee218, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x724b28c69a60, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c46de60 rbx 0 rdx 0 rcx 0xffff80003c4a3a20 rax 0x2a r8 0xffff80003c46dd90 r9 0 r10 0xe3162ead69dd3310 r11 0x9f718c56eaac148c r12 0 r13 0 r14 0 r15 0 rip 0xffffffff830304c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c46dde0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=210225 pid=93734 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4a2d28,0xffff80003c4a2570 process=0xffff80003581f5c0 user=0xffff80003c468000, vmspace=0xfffffd805d3ee7d0 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *93734 210225 27263 0 7 0 syz-executor 93734 209420 27263 0 3 0x4000080 fsleep syz-executor 37903 522818 17462 0 2 0 syz-executor 37903 186420 17462 0 3 0x4000080 fsleep syz-executor 37903 516522 17462 0 3 0x4000080 fsleep syz-executor 37903 445912 17462 0 3 0x4000080 fsleep syz-executor 84459 290384 87132 0 2 0 syz-executor 84459 66506 87132 0 2 0x4000000 syz-executor 47795 477858 52055 0 2 0 syz-executor 47795 42768 52055 0 3 0x4000080 fsleep syz-executor 20151 462695 54351 0 2 0 syz-executor 20151 39355 54351 0 3 0x4000080 lockf syz-executor 20151 256916 54351 0 3 0x4000080 lockf syz-executor 20151 283886 54351 0 3 0x4000080 fsleep syz-executor 12523 274415 0 0 3 0x14200 acct acct 54351 419992 58337 0 2 0x2 syz-executor 27263 458566 58337 0 2 0x2 syz-executor 52055 134259 58337 0 2 0x3 syz-executor 77814 101922 1 0 3 0x100083 ttyin getty 8667 153599 58337 0 2 0x3 syz-executor 63896 43685 58337 0 2 0x2 syz-executor 17462 292359 58337 0 2 0x3 syz-executor 16133 370533 0 0 3 0x14200 bored sosplice 12654 35488 58337 0 2 0x3 syz-executor 87132 18663 58337 0 2 0x3 syz-executor 58337 322515 28205 0 2 0x2 syz-executor 28205 135717 88349 0 3 0x10008a sigsusp ksh 88349 520103 51641 0 3 0x98 kqread sshd-session 51641 321782 26061 0 3 0x92 kqread sshd-session 26061 141052 1 0 3 0x88 kqread sshd 86945 163049 70322 74 3 0x1100092 bpf pflogd 70322 500000 1 0 3 0x80 sbwait pflogd 30300 488214 28652 73 3 0x1100090 kqread syslogd 28652 370806 1 0 3 0x100082 sbwait syslogd 10010 424075 1 0 3 0x100080 kqread resolvd 52978 174527 79977 77 3 0x100092 kqread dhcpleased 60619 49598 79977 77 3 0x100092 kqread dhcpleased 79977 28351 1 0 3 0x80 kqread dhcpleased 82615 171484 0 0 3 0x14200 bored smr 14644 488807 0 0 2 0x14200 zerothread 1075 352578 0 0 3 0x14200 aiodoned aiodoned 70169 206165 0 0 3 0x14200 syncer update 21788 20282 0 0 3 0x14200 cleaner cleaner 44761 433689 0 0 2 0x14200 reaper 99507 54364 0 0 3 0x14200 pgdaemon pagedaemon 87906 471871 0 0 3 0x14200 bored viomb 9862 492177 0 0 3 0x40014200 acpi0 acpi0 45738 27542 0 0 3 0x40014200 idle1 36142 188306 0 0 3 0x14200 bored softnet7 8106 523406 0 0 3 0x14200 bored softnet6 29511 422977 0 0 3 0x14200 bored softnet5 56610 212210 0 0 3 0x14200 bored softnet4 1424 207557 0 0 3 0x14200 bored softnet3 33988 53617 0 0 3 0x14200 bored softnet2 93925 520102 0 0 3 0x14200 bored softnet1 24826 202248 0 0 3 0x14200 bored softnet0 70281 138128 0 0 3 0x14200 bored systqmp 54119 288211 0 0 3 0x14200 bored systq 62864 319480 0 0 3 0x14200 tmoslp softclockmp 23642 254979 0 0 3 0x40014200 tmoslp softclock 53875 371227 0 0 3 0x40014200 idle0 1 488970 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 (0xfffffd807d4eb810) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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 pmap_extract+0xb1 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:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #8 recall_trap+0x8 Process 93734 (syz-executor) thread 0xffff80003c4a3a20 (210225) Process 63896 (syz-executor) thread 0xffff80002ebfc7f0 (43685) Process 44761 (reaper) thread 0xffff8000ffffc2a0 (433689) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10264 11089K 11734K 166960K 15248 0 pcb 19 18K 20K 166960K 1076 0 rtable 244 15K 15K 166960K 896 0 pf 44 19K 67487K 166960K 493 0 ifaddr 44 9K 9K 166960K 286 0 ifgroup 71 3K 3K 166960K 549 0 sysctl 4 1K 9K 166960K 73 0 counters 74 37K 39K 166960K 658 0 ioctlops 0 0K 5K 166960K 2649 0 iov 0 0K 28K 166960K 331 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1497 94K 94K 166960K 5247 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 72 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 308 0 dirhash 12 2K 2K 166960K 87 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 4585 0 sigio 0 0K 0K 166960K 160 0 proc 73 115K 180K 166960K 1350 0 subproc 72 4K 4K 166960K 146 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 896 0 in_multi 84 6K 7K 166960K 359 0 ether_multi 1 0K 0K 166960K 45 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 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 1348 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 9 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 239 144K 164K 166960K 43632 0 UVM aobj 65 7K 7K 166960K 70 0 pinsyscall 42 84K 98K 166960K 5898 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 261 0 NDP 15 0K 1K 166960K 209 0 temp 81 8652K 8780K 166960K 218296 0 kqueue 13 20K 32K 166960K 924 0 SYN cache 2 0K 16K 166960K 4 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 120 394 0 391 3 0 3 3 0 8 2 rtentry 176 305 0 217 5 0 5 5 0 8 0 unpcb 144 3237 0 3219 28 23 5 10 0 8 4 syncache 336 24 0 24 10 9 1 1 0 8 1 tcpqe 32 10 0 10 5 4 1 1 0 8 1 tcpcb 736 1615 0 1608 30 23 7 8 0 8 5 arp 128 45 0 34 1 0 1 1 0 8 0 ipq 40 10 0 9 1 0 1 1 0 8 0 ipqe 40 12 0 11 1 0 1 1 0 8 0 inpcb 328 5302 0 5287 61 54 7 13 0 8 5 ip6q 72 6 0 3 1 0 1 1 0 8 0 ip6af 40 8 0 5 1 0 1 1 0 8 0 nd6 144 51 0 30 1 0 1 1 0 8 0 pkpcb 40 92 0 92 10 9 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 mppekey 1024 5 0 5 4 4 0 1 0 8 0 ppxss 1192 231 0 231 8 7 1 1 0 8 1 pppxif 1504 33 0 33 7 7 0 1 0 8 0 pffrag 232 5 0 5 1 1 0 1 0 482 0 pffrnode 88 5 0 5 1 1 0 1 0 8 0 pffrent 40 8 0 8 1 1 0 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 6 0 6 3 2 1 1 0 8 1 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 37 0 33 1 0 1 1 0 8 0 pfstkey 128 38 0 34 2 1 1 2 0 8 0 pfstate 384 38 0 34 4 1 3 4 0 8 0 pfrule 1344 33 0 28 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 6 0 0 6 0 6 6 0 8 0 art_heap4 256 1230 0 775 34 5 29 30 0 8 0 art_table 40 1236 0 775 5 0 5 5 0 8 0 art_node 32 303 0 228 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 13 1 0 1 1 0 8 0 semupl 112 5 0 5 4 4 0 1 0 8 0 semapl 112 296 0 286 1 0 1 1 0 8 0 shmpl 112 67 0 5 2 0 2 2 0 8 0 dirhash 1024 68 0 51 3 0 3 3 0 8 0 dino2pl 256 9999 0 8464 97 0 97 97 0 8 0 ffsino 296 9999 0 8464 119 0 119 119 0 8 0 nchpl 144 16334 0 14633 64 0 64 64 0 8 0 rtmask 32 42 0 42 9 8 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 59220 0 59220 11 10 1 2 0 8 1 percpumem 16 344 0 292 1 0 1 1 0 8 0 kstatmem 264 360 0 324 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 11 0 11 9 8 1 1 0 8 1 scxspl 216 134850 0 134850 18 16 2 8 1 8 2 plimitpl 152 1235 0 1217 1 0 1 1 0 8 0 sigapl 424 4856 0 4801 9 2 7 9 0 8 0 knotepl 120 805 0 0 23 0 23 23 0 8 0 kqueuepl 224 1650 0 1641 9 7 2 5 0 8 1 pipepl 344 779 0 752 19 16 3 9 0 8 0 fdescpl 528 4798 0 4767 3 0 3 3 0 8 0 filepl 160 34197 0 33981 55 39 16 20 0 8 4 lockfpl 104 2631 0 2625 3 2 1 2 0 8 0 lockfspl 48 883 0 880 1 0 1 1 0 8 0 sessionpl 144 51 0 42 1 0 1 1 0 8 0 pgrppl 48 129 0 112 1 0 1 1 0 8 0 ucredpl 104 6267 0 6254 1 0 1 1 0 8 0 zombiepl 144 5333 0 5332 1 0 1 1 0 8 0 processpl 1248 4856 0 4801 6 1 5 6 0 8 0 procpl 664 12248 0 12183 8 1 7 8 0 8 0 sosppl 168 22 0 21 8 7 1 1 0 8 0 sockpl 752 9210 0 9174 113 99 14 29 0 8 8 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 57 0 0 7 0 7 7 0 8 0 mtagpl 96 20 0 0 1 0 1 1 0 8 0 mbufpl 256 1179 0 0 71 0 71 71 0 8 0 bufpl 280 57208 0 51065 441 1 440 440 0 8 0 anonpl 32 15991 0 0 131 2 129 129 0 246 0 amapchunkpl 152 149837 0 149292 94 60 34 38 0 158 8 amappl16 200 19849 0 19780 148 126 22 38 0 8 7 amappl15 192 7 0 7 2 2 0 1 0 8 0 amappl14 184 182 0 170 1 0 1 1 0 8 0 amappl13 176 11 0 11 3 3 0 1 0 8 0 amappl12 168 5584 0 5554 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 6 0 5 2 1 1 1 0 8 0 amappl9 144 258 0 257 3 2 1 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 148 0 136 1 0 1 1 0 8 0 amappl6 120 271 0 268 1 0 1 1 0 8 0 amappl5 112 162 0 151 1 0 1 1 0 8 0 amappl4 104 379 0 358 1 0 1 1 0 8 0 amappl3 96 30868 0 30757 4 0 4 4 0 8 0 amappl2 88 907 0 842 2 0 2 2 0 8 0 amappl1 80 30051 0 29451 18 3 15 15 0 8 0 amappl 88 41942 0 41773 5 0 5 5 0 92 0 dma65536 65536 2 0 2 1 1 0 1 0 8 0 dma16384 16384 2 0 2 1 1 0 1 0 8 0 dma4096 4096 4 0 4 4 4 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 69 0 5 2 0 2 2 0 8 0 uaddrrnd 24 4798 0 4767 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4797 0 4767 1 0 1 1 0 8 0 vmmpekpl 168 39395 0 39344 5 2 3 3 0 8 0 vmmpepl 168 310458 0 308418 166 57 109 122 0 357 2 vmsppl 488 4797 0 4767 8 3 5 5 0 8 0 rwobjpl 80 86274 0 79295 167 16 151 157 0 8 0 pdppl 4096 9603 0 9534 133 60 73 83 0 8 4 pvpl 32 23129 0 0 186 0 186 186 0 265 0 pmappl 256 4797 0 4767 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 440 0 121 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83847ff0) 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(800,65) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,65) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83315464) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d242c) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a34ce60,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a34ce60) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800000afb000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 end trace frame: 0xffff80002a34cf90, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83847ff0) 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(800,65) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,65) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83315464) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d242c) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a34ce60,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a34ce60) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800000afb000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff800031009778) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800031009778) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a34d010) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80622f00d8,81,fffffd80097fb680,ffff800031009778) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b3f6eb8,ffff800031009778) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b3f6eb8,ffff800031009778) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b3f6eb8,ffff800031009778) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b3f6eb8,ffff800031009778) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800031009778) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800031009778,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800031009778,ffff80002a34d380,ffff80002a34d2d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a34d380) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a34d380) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738d841c6c00, count: -25 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: 0x724b28c69a60, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x724b28c69a60, count: -1