*cpu1: uvm_fault(0xfffffd806b5fb020, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f67e96fed10, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a3c0430 rbx 0 rdx 0 rcx 0xffff8000ffff2f70 rax 0x2a r8 0xffff80002a3c0360 r9 0x4 r10 0xaef2c047c0dea6b2 r11 0x7d60ba88def51b0a r12 0 r13 0 r14 0 r15 0 rip 0xffffffff815fd4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a3c03b0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=57401 pid=58638 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=86, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff3720,0xffff8000ffff27d0 process=0xffff8000fffeef48 user=0xffff80002a3bb000, vmspace=0xfffffd806bf28798 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *58638 57401 36254 0 7 0 syz-executor 19512 59586 57624 0 2 0 syz-executor 19512 343670 57624 0 2 0x4000000 syz-executor 17287 219990 8723 0 2 0 syz-executor 72985 196283 55610 0 2 0 syz-executor 72985 121094 55610 0 2 0x4000000 syz-executor 72985 413406 55610 0 2 0x4000000 syz-executor 28042 357217 48332 0 2 0 syz-executor 28042 309579 48332 0 3 0x4000080 fsleep syz-executor 69904 294878 82493 0 2 0 syz-executor 69904 156136 82493 0 3 0x4000080 fsleep syz-executor 30835 169711 1 0 3 0x100083 ttyin getty 78268 336336 99980 0 3 0x82 nanoslp syz-executor 55610 397818 99980 0 2 0x2 syz-executor 8723 15081 99980 0 3 0x82 nanoslp syz-executor 48332 386189 99980 0 3 0x82 nanoslp syz-executor 36254 300943 99980 0 3 0x82 nanoslp syz-executor 82493 337174 99980 0 3 0x82 nanoslp syz-executor 25659 225211 0 0 3 0x14280 nfsidl nfsio 73398 464597 0 0 3 0x14280 nfsidl nfsio 67105 303935 0 0 3 0x14280 nfsidl nfsio 89247 207950 0 0 3 0x14280 nfsidl nfsio 90840 506416 0 0 3 0x14280 nfsidl nfsio 84334 426257 0 0 3 0x14280 nfsidl nfsio 85159 105618 0 0 3 0x14280 nfsidl nfsio 32764 510350 0 0 3 0x14280 nfsidl nfsio 43762 444902 0 0 3 0x14280 nfsidl nfsio 71870 175540 0 0 3 0x14280 nfsidl nfsio 44239 381307 0 0 3 0x14280 nfsidl nfsio 46508 492826 0 0 3 0x14280 nfsidl nfsio 52127 488570 0 0 3 0x14280 nfsidl nfsio 27933 160356 0 0 3 0x14280 nfsidl nfsio 84222 225196 0 0 3 0x14280 nfsidl nfsio 57311 127218 0 0 3 0x14280 nfsidl nfsio 68886 291585 0 0 3 0x14280 nfsidl nfsio 32381 143986 0 0 3 0x14280 nfsidl nfsio 72040 445725 0 0 3 0x14280 nfsidl nfsio 4423 448840 0 0 3 0x14280 nfsidl nfsio 57624 322783 99980 0 3 0x82 nanoslp syz-executor 77917 77898 99980 0 3 0x2 biowait syz-executor 56319 120952 0 0 3 0x14200 bored sosplice 99980 271763 54209 0 2 0x2 syz-executor 54209 496417 94141 0 3 0x10008a sigsusp ksh 94141 500176 2024 0 3 0x98 kqread sshd-session 2024 161869 38800 0 3 0x92 kqread sshd-session 38800 401477 1 0 3 0x88 kqread sshd 23224 495661 32872 74 3 0x1100092 bpf pflogd 32872 76718 1 0 3 0x80 sbwait pflogd 37233 24420 30444 73 3 0x1100090 kqread syslogd 30444 515521 1 0 3 0x100082 sbwait syslogd 71657 496410 1 0 3 0x100080 kqread resolvd 50998 257995 34081 77 3 0x100092 kqread dhcpleased 26099 94524 34081 77 3 0x100092 kqread dhcpleased 34081 65511 1 0 3 0x80 kqread dhcpleased 87034 504521 0 0 3 0x14200 bored smr 44560 267233 0 0 2 0x14200 zerothread 57724 70026 0 0 3 0x14200 aiodoned aiodoned 15223 220922 0 0 3 0x14200 syncer update 81527 15527 0 0 3 0x14200 cleaner cleaner 40058 67278 0 0 3 0x14200 reaper reaper 81341 451290 0 0 3 0x14200 pgdaemon pagedaemon 81314 278131 0 0 3 0x14200 bored viomb 73299 324265 0 0 3 0x40014200 acpi0 acpi0 75089 514253 0 0 3 0x40014200 idle1 29691 160836 0 0 3 0x14200 bored softnet3 17689 49708 0 0 3 0x14200 bored softnet2 50046 185366 0 0 3 0x14200 bored softnet1 81410 268220 0 0 3 0x14200 bored softnet0 11977 387364 0 0 3 0x14200 bored systqmp 79228 159907 0 0 3 0x14200 bored systq 62630 125956 0 0 3 0x14200 tmoslp softclockmp 43151 17055 0 0 3 0x40014200 tmoslp softclock 76746 172393 0 0 3 0x40014200 idle0 1 16594 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 (0xfffffd806b5fa210) #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 58638 (syz-executor) thread 0xffff8000ffff2f70 (57401) Process 77917 (syz-executor) thread 0xffff8000ffff0020 (77898) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10244 11153K 13395K 166960K 23126 0 pcb 19 20K 22K 166960K 1481 0 rtable 200 16K 19K 166960K 1709 0 pf 40 19K 82K 166960K 501 0 ifaddr 29 5K 9K 166960K 344 0 ifgroup 56 2K 3K 166960K 667 0 sysctl 4 1K 9K 166960K 58 0 counters 66 36K 38K 166960K 634 0 ioctlops 0 0K 4K 166960K 2755 0 iov 0 0K 32K 166960K 550 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1515 95K 96K 166960K 8538 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 16K 24K 166960K 159 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 390 0 dirhash 15 2K 3K 166960K 165 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 233K 166960K 7574 0 sigio 0 0K 0K 166960K 296 0 proc 72 91K 152K 166960K 1841 0 subproc 72 4K 4K 166960K 255 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1565 0 in_multi 45 3K 7K 166960K 515 0 ether_multi 1 0K 0K 166960K 63 0 mrt 1 0K 0K 166960K 25 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 121 546K 546K 166960K 121 0 exec 0 0K 1K 166960K 2383 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 10 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 230 155K 174K 166960K 67604 0 UVM aobj 164 9K 10K 166960K 185 0 pinsyscall 42 84K 100K 166960K 9202 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 487 0 NDP 12 0K 1K 166960K 254 0 temp 83 8684K 8940K 166960K 297004 0 kqueue 13 20K 38K 166960K 1335 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 120 598 0 595 3 2 1 2 0 8 0 rtentry 176 496 0 426 7 1 6 6 0 8 0 unpcb 144 6053 0 6035 37 35 2 7 0 8 1 syncache 336 11 0 11 3 3 0 1 0 8 0 tcpcb 808 3136 0 3132 68 67 1 14 0 8 0 arp 128 86 0 67 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 384 9316 0 9306 100 91 9 20 0 8 7 nd6 144 116 0 97 3 1 2 2 0 8 0 pkpcb 40 249 0 249 8 7 1 1 0 8 1 kcovpl 48 28 0 20 1 0 1 1 0 8 0 mppekey 1024 4 0 4 4 3 1 1 0 8 1 ppxss 1192 190 0 190 9 8 1 1 0 8 1 pppxif 1504 39 0 39 10 9 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 102 0 94 1 0 1 1 0 482 0 pffrnode 88 91 0 83 1 0 1 1 0 8 0 pffrent 40 209 0 201 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 7 0 4 1 0 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 3 0 1 1 0 1 1 0 8 0 pfstitem 24 405 0 223 2 0 2 2 0 8 0 pfstkey 128 406 0 224 6 0 6 6 0 8 0 pfstate 384 406 0 224 19 0 19 19 0 8 0 pfrule 1344 32 0 22 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 2102 0 1855 52 20 32 33 0 8 7 art_table 32 2106 0 1855 5 0 5 5 0 8 0 art_node 16 468 0 416 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 5 0 5 2 2 0 1 0 8 0 semapl 112 380 0 370 1 0 1 1 0 8 0 shmpl 112 182 0 21 5 0 5 5 0 8 0 dirhash 1024 119 0 100 3 0 3 3 0 8 0 dino2pl 256 15546 0 14002 98 0 98 98 0 8 0 ffsino 288 15546 0 14002 111 0 111 111 0 8 0 nchpl 144 26039 0 25452 64 39 25 64 0 8 0 rtmask 32 38 0 38 12 11 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 100103 0 100102 6 5 1 2 0 8 0 percpumem 16 332 0 284 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 396 0 368 5 2 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 34 0 34 13 12 1 1 0 8 1 scxspl 216 80662 0 80661 18 16 2 8 1 8 1 plimitpl 152 1850 0 1833 1 0 1 1 0 8 0 sigapl 424 7873 0 7803 12 3 9 9 0 8 0 knotepl 120 854 0 0 23 0 23 23 0 8 0 kqueuepl 224 3515 0 3506 32 29 3 9 0 8 2 pipepl 336 1068 0 1041 16 13 3 8 0 8 0 fdescpl 520 7798 0 7767 3 0 3 3 0 8 0 filepl 160 60444 0 60227 58 45 13 23 0 8 0 lockfpl 104 2668 0 2664 2 1 1 2 0 8 0 lockfspl 48 963 0 959 1 0 1 1 0 8 0 sessionpl 144 55 0 46 1 0 1 1 0 8 0 pgrppl 48 311 0 294 1 0 1 1 0 8 0 ucredpl 104 10987 0 10973 1 0 1 1 0 8 0 zombiepl 144 8667 0 8666 4 3 1 1 0 8 0 processpl 1208 7873 0 7803 7 1 6 6 0 8 0 procpl 656 19921 0 19846 9 1 8 8 0 8 0 srpgc 96 51 0 51 9 8 1 1 0 8 1 sosppl 168 45 0 45 11 10 1 1 0 8 1 sockpl 728 16443 0 16412 123 113 10 19 0 8 7 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 72 0 0 7 1 6 7 0 8 0 mtagpl 96 361 0 0 9 0 9 9 0 8 0 mbufpl 256 1272 0 0 80 0 80 80 0 8 0 bufpl 280 20137 0 13992 440 0 440 440 0 8 0 anonpl 32 19214 0 0 155 0 155 155 0 246 0 amapchunkpl 152 238264 0 237658 93 59 34 40 0 158 5 amappl16 200 16188 0 15679 91 56 35 41 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 183 0 169 1 0 1 1 0 8 0 amappl13 176 10 0 10 4 4 0 1 0 8 0 amappl12 168 8764 0 8735 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 23 0 22 2 1 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 163 0 150 1 0 1 1 0 8 0 amappl6 120 385 0 381 1 0 1 1 0 8 0 amappl5 112 211 0 201 1 0 1 1 0 8 0 amappl4 104 414 0 394 1 0 1 1 0 8 0 amappl3 96 50415 0 50318 4 0 4 4 0 8 0 amappl2 88 1108 0 1042 2 0 2 2 0 8 0 amappl1 80 41955 0 41369 16 2 14 15 0 8 0 amappl 88 65127 0 64971 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma8192 8192 3 0 3 3 3 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 2 2 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 9 0 9 4 4 0 1 0 8 0 dma128 128 264 0 264 8 8 0 1 0 8 0 dma64 64 11 0 11 5 5 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 72 184 0 21 3 0 3 3 0 8 0 uaddrrnd 24 7798 0 7767 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7798 0 7767 1 0 1 1 0 8 0 vmmpekpl 168 52405 0 52335 4 0 4 4 0 8 0 vmmpepl 168 479295 0 476835 182 51 131 133 0 357 5 vmsppl 480 7797 0 7767 5 0 5 5 0 8 0 rwobjpl 72 112146 0 104664 142 0 142 142 0 8 0 pdppl 4096 15604 0 15534 142 70 72 84 0 8 2 pvpl 32 26921 0 0 217 1 216 216 0 265 0 pmappl 256 7797 0 7767 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 630 0 194 13 0 13 13 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: 0x7f67e96fed10, 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_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+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,3e) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(3e) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(3e) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff83402458) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a215a) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80003c441140,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80003c441140) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c441220, 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_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+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,3e) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(3e) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(3e) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff83402458) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a215a) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80003c441140,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80003c441140) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000163c000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,1,2000,ffff80003c4134c0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80003c4134c0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c4412f0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806877c888,1,fffffd807f7d38f0,ffff80003c4134c0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80767ecef0,ffff80003c4134c0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80767ecef0,ffff80003c4134c0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80767ecef0,ffff80003c4134c0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80767ecef0,ffff80003c4134c0) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4134c0) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4134c0,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c4134c0,ffff80003c441660,ffff80003c4415b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c441660) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c441660) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c4af1356d10, count: -26