*cpu1: uvm_fault(0xfffffd806b7dc9a0, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x775e20c19540, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c4ff6f0 rbx 0 rdx 0 rcx 0xffff80003c4efa28 rax 0x2a r8 0xffff80003c4ff620 r9 0x1 r10 0x1d6692e2f63de4ee r11 0xe74d1e99ae66560 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81da64c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c4ff670 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=74194 pid=42673 tcnt=2 stat=onproc flags process=10 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe8d18,0xffff80003c4ef7a0 process=0xffff8000fffef038 user=0xffff80003c4fa000, vmspace=0xfffffd800b0633d0 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49669 12847 19937 0 2 0 syz-executor 49669 431830 19937 0 3 0x4000080 fsleep syz-executor *42673 74194 94208 60929 7 0x10 syz-executor 42673 426418 94208 60929 3 0x4000090 fsleep syz-executor 75398 33135 48715 0 3 0x80 nanoslp syz-executor 75398 66571 48715 0 3 0x4000080 ttyopn syz-executor 75398 319234 48715 0 3 0x4000080 fsleep syz-executor 7331 516006 68527 0 3 0x82 nanoslp syz-executor 66629 375620 68527 0 3 0x2 biowait syz-executor 75086 141125 68527 0 3 0x82 wait syz-executor 48715 181925 68527 0 3 0x82 nanoslp syz-executor 60227 276643 1 0 3 0x100083 ttyin getty 37926 146937 68527 0 3 0x82 nanoslp syz-executor 94208 16071 68527 0 3 0x82 nanoslp syz-executor 68358 351331 78791 0 3 0x82 sbwait sshd-session 50595 290458 68527 0 3 0x82 wait syz-executor 19937 460257 68527 0 3 0x82 nanoslp syz-executor 68527 111552 70178 0 3 0x82 kqread syz-executor 70178 233086 71519 0 3 0x10008a sigsusp ksh 71519 33685 77884 0 3 0x98 kqread sshd-session 77884 58165 78791 0 3 0x92 kqread sshd-session 78791 25078 1 0 3 0x88 kqread sshd 41876 351326 8841 74 3 0x1100092 bpf pflogd 8841 161467 1 0 3 0x80 sbwait pflogd 88056 10246 5397 73 3 0x1100090 kqread syslogd 5397 215522 1 0 3 0x100082 sbwait syslogd 63085 339867 1 0 3 0x100080 kqread resolvd 26708 89210 64999 77 3 0x100092 kqread dhcpleased 96494 404104 64999 77 3 0x100092 kqread dhcpleased 64999 311163 1 0 3 0x80 kqread dhcpleased 58307 439831 0 0 3 0x14200 bored smr 71630 334534 0 0 2 0x14200 zerothread 6720 112991 0 0 3 0x14200 aiodoned aiodoned 97035 490120 0 0 3 0x14200 syncer update 32214 83537 0 0 3 0x14200 cleaner cleaner 1822 39234 0 0 3 0x14200 reaper reaper 23945 142721 0 0 3 0x14200 pgdaemon pagedaemon 90580 413775 0 0 3 0x14200 bored viomb 87332 259902 0 0 3 0x40014200 acpi0 acpi0 45711 156699 0 0 3 0x40014200 idle1 31601 65195 0 0 3 0x14200 bored softnet1 71578 290541 0 0 3 0x14200 bored softnet0 44737 420497 0 0 3 0x14200 bored systqmp 29752 212182 0 0 3 0x14200 bored systq 47843 240800 0 0 3 0x14200 tmoslp softclockmp 25945 501662 0 0 3 0x40014200 tmoslp softclock 88298 219843 0 0 3 0x40014200 idle0 1 263413 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff838c44b0) #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 uvm_fault_lower+0x673 sys/uvm/uvm_fault.c:1550 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 #7 recall_trap+0x8 Process 42673 (syz-executor) thread 0xffff80003c4efa28 (74194) Process 66629 (syz-executor) thread 0xffff8000fffe94e0 (375620) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10237 11076K 11567K 166960K 17420 0 pcb 18 16K 17K 166960K 986 0 rtable 218 14K 15K 166960K 881 0 pf 33 17K 22K 166960K 566 0 ifaddr 34 7K 10K 166960K 245 0 ifgroup 47 2K 2K 166960K 456 0 sysctl 4 1K 9K 166960K 29 0 counters 64 36K 38K 166960K 830 0 ioctlops 0 0K 4K 166960K 2575 0 iov 0 0K 24K 166960K 323 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1505 95K 95K 166960K 5484 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 10K 166960K 53 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 233 0 dirhash 12 2K 2K 166960K 75 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 3566 0 sigio 0 0K 0K 166960K 91 0 proc 73 115K 180K 166960K 1024 0 subproc 72 4K 4K 166960K 130 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 529 0 in_multi 68 5K 7K 166960K 270 0 ether_multi 2 0K 0K 166960K 27 0 mrt 2 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 271 1208K 1208K 166960K 271 0 exec 0 0K 1K 166960K 950 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 263 169K 193K 166960K 34544 0 UVM aobj 69 13K 13K 166960K 78 0 pinsyscall 44 88K 104K 166960K 4889 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 274 0 NDP 10 0K 1K 166960K 182 0 temp 85 8676K 74472K 166960K 186839 0 kqueue 13 20K 36K 166960K 699 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 120 384 0 381 4 3 1 3 0 8 0 rtentry 176 263 0 185 6 0 6 6 0 8 0 unpcb 144 2459 0 2440 18 14 4 6 0 8 3 syncache 336 6 0 6 3 2 1 1 0 8 1 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 1118 0 1112 16 15 1 7 0 8 0 arp 136 44 0 31 1 0 1 1 0 8 0 inpcb 328 4218 0 4206 26 22 4 12 0 8 2 nd6 152 51 0 31 2 0 2 2 0 8 0 pkpcb 40 99 0 99 4 3 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 mppekey 1024 6 0 6 5 5 0 1 0 8 0 ppxss 1192 338 0 338 3 2 1 1 0 8 1 pppxif 1504 23 0 23 6 5 1 1 0 8 1 pfstscr 40 4 0 3 1 0 1 1 0 8 0 pffrag 232 31 0 19 1 0 1 1 0 482 0 pffrnode 88 29 0 18 1 0 1 1 0 8 0 pffrent 40 86 0 74 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 4 0 4 3 3 0 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 182 0 90 1 0 1 1 0 8 0 pfstkey 128 185 0 93 4 0 4 4 0 8 0 pfstate 448 184 0 93 12 0 12 12 0 8 0 pfrule 1344 39 0 34 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 1110 0 790 36 10 26 31 0 8 0 art_table 40 1114 0 790 5 0 5 5 0 8 0 art_node 32 259 0 189 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 7 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 230 0 220 1 0 1 1 0 8 0 shmpl 112 71 0 8 2 0 2 2 0 8 0 dirhash 1024 59 0 42 3 0 3 3 0 8 0 dino2pl 256 8424 0 6894 98 1 97 97 0 8 0 ffsino 296 8424 0 6894 120 1 119 119 0 8 0 nchpl 144 13400 0 11678 65 0 65 65 0 8 0 rtmask 32 32 0 32 4 3 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 47074 0 47074 3 2 1 1 0 8 1 percpumem 16 430 0 383 1 0 1 1 0 8 0 vcpupl 3968 4 0 1 1 0 1 1 0 8 0 vmpool 840 4 0 1 1 0 1 1 0 8 0 kstatmem 264 308 0 286 6 3 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 20 0 20 4 4 0 1 0 8 0 scxspl 216 90456 0 90455 12 10 2 5 1 8 1 plimitpl 152 982 0 965 1 0 1 1 0 8 0 sigapl 424 3901 0 3853 8 1 7 8 0 8 0 knotepl 120 599 0 0 17 0 17 17 0 8 0 kqueuepl 224 1371 0 1362 12 8 4 5 0 8 3 pipepl 344 701 0 673 13 10 3 8 0 8 0 fdescpl 528 3858 0 3826 3 0 3 3 0 8 0 filepl 160 27578 0 27349 37 21 16 20 0 8 2 lockfpl 104 1685 0 1680 3 1 2 2 0 8 0 lockfspl 48 691 0 686 1 0 1 1 0 8 0 sessionpl 144 31 0 21 1 0 1 1 0 8 0 pgrppl 48 135 0 117 1 0 1 1 0 8 0 ucredpl 104 4452 0 4438 1 0 1 1 0 8 0 zombiepl 144 4359 0 4355 1 0 1 1 0 8 0 processpl 1232 3901 0 3853 6 0 6 6 0 8 0 procpl 664 9593 0 9541 8 1 7 8 0 8 0 sosppl 176 24 0 24 6 5 1 1 0 8 1 sockpl 752 7257 0 7223 51 40 11 18 0 8 6 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k 2048 76 0 0 8 0 8 8 0 8 0 mtagpl 96 62 0 0 2 0 2 2 0 8 0 mbufpl 256 1585 0 0 99 0 99 99 0 8 0 bufpl 280 36090 0 29953 439 0 439 439 0 8 0 anonpl 32 15888 0 0 128 0 128 128 0 246 0 amapchunkpl 152 120918 0 120377 64 31 33 38 0 158 5 amappl16 200 13508 0 13465 73 57 16 39 0 8 4 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 6 0 6 2 2 0 1 0 8 0 amappl13 176 529 0 528 1 0 1 1 0 8 0 amappl12 168 4268 0 4224 3 0 3 3 0 8 0 amappl11 160 4 0 3 1 0 1 1 0 8 0 amappl10 152 61 0 47 1 0 1 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 29 0 26 1 0 1 1 0 8 0 amappl7 128 108 0 105 1 0 1 1 0 8 0 amappl6 120 358 0 343 1 0 1 1 0 8 0 amappl5 112 80 0 68 1 0 1 1 0 8 0 amappl4 104 489 0 459 1 0 1 1 0 8 0 amappl3 96 21022 0 20926 4 1 3 3 0 8 0 amappl2 88 3971 0 3886 2 0 2 2 0 8 0 amappl1 80 24268 0 23592 16 1 15 15 0 8 0 amappl 88 33111 0 32933 5 0 5 5 0 92 0 uvmvnodes 80 202 0 0 5 0 5 5 0 8 0 dma65536 65536 2 0 2 2 2 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 3 0 3 3 3 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 2 0 2 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 263 0 263 6 6 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 77 0 9 2 0 2 2 0 8 0 uaddrrnd 24 3858 0 3826 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3858 0 3826 1 0 1 1 0 8 0 vmmpekpl 168 29462 0 29411 3 0 3 3 0 8 0 vmmpepl 168 244500 0 242390 139 31 108 123 0 357 2 vmsppl 488 3857 0 3826 5 0 5 5 0 8 0 rwobjpl 80 61664 0 60343 44 10 34 39 0 8 0 pdppl 4096 7731 0 7657 113 37 76 83 0 8 2 pvpl 32 26459 0 0 212 0 212 212 0 265 0 pmappl 256 3861 0 3827 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 433 0 82 11 0 11 11 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: 0x775e20c19540, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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:682 acpitimer_delay(1) at acpitimer_delay+0x175 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x175 sys/dev/acpi/acpitimer.c:125 comcnputc(800,20) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8334c28d) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8340e930) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a3b1ea0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a3b1ea0) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:510 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80002a3b1f80, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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:682 acpitimer_delay(1) at acpitimer_delay+0x175 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x175 sys/dev/acpi/acpitimer.c:125 comcnputc(800,20) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8334c28d) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8340e930) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a3b1ea0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a3b1ea0) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:510 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001491000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffe8d18) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe8d18) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a3b2050) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f32cd90,81,fffffd80097fd5b0,ffff8000fffe8d18) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b373c70,ffff8000fffe8d18) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b373c70,ffff8000fffe8d18) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b373c70,ffff8000fffe8d18) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b373c70,ffff8000fffe8d18) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe8d18) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe8d18,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe8d18,ffff80002a3b23c0,ffff80002a3b2310) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3b23c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3b23c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x786c41bddf90, count: -26