*cpu0: uvm_fault(0xfffffd806c79eb90, 0x48, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7e900540d540, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c439880 rbx 0 rdx 0 rcx 0xffff8000fffde028 rax 0x2a r8 0xffff80003c4397b0 r9 0xa0586f51001 r10 0x74572501553d31ff r11 0xe47f6f1406086b48 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff832354c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c439800 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=489851 pid=65629 tcnt=1 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=0xffff80002a2afca0,0xffffffff83998920 process=0xffff8000fffed358 user=0xffff80003c434000, vmspace=0xfffffd806c9d49a0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *65629 489851 81910 0 7 0 syz-executor 52751 498034 99635 0 2 0 syz-executor 52751 171029 99635 0 2 0x4000000 syz-executor 23351 326722 77355 0 2 0xc80 syz-executor 23351 100721 77355 0 3 0x4000080 ttyin syz-executor 23351 389307 77355 0 3 0x4000080 fsleep syz-executor 23351 365760 77355 0 3 0x4000080 fsleep syz-executor 15485 19113 93496 0 2 0xc80 syz-executor 15485 219289 93496 0 3 0x4000080 piperd syz-executor 15485 311017 93496 0 3 0x4000080 fsleep syz-executor 59208 288559 64912 0 2 0xc80 syz-executor 59208 395053 64912 0 3 0x4000080 sbwait syz-executor 59208 209569 64912 0 3 0x4000080 fsleep syz-executor 81910 430425 25455 0 3 0x82 nanoslp syz-executor 39659 146036 25455 0 2 0xc82 syz-executor 10922 5014 25455 0 3 0x82 nanoslp syz-executor 45840 10770 9302 0 3 0x100082 sbwait arp 9302 226352 1 0 3 0x10008a sigsusp sh 99635 403147 25455 0 2 0xc82 syz-executor 93496 71660 25455 0 2 0xc82 syz-executor 77355 520489 25455 0 2 0xc82 syz-executor 22580 102276 25455 0 2 0xc82 syz-executor 64912 38642 25455 0 2 0xc82 syz-executor 25455 159029 14825 0 3 0x82 kqread syz-executor 14825 159329 82804 0 3 0x10008a sigsusp ksh 82804 475227 65934 0 3 0x98 kqread sshd-session 65934 286510 93073 0 3 0x92 kqread sshd-session 44289 396254 1 0 3 0x100083 ttyopn getty 93073 102398 1 0 3 0x88 kqread sshd 25207 460848 73432 74 3 0x1100092 bpf pflogd 73432 75672 1 0 3 0x80 sbwait pflogd 80818 323890 19110 73 3 0x1100090 kqread syslogd 19110 75225 1 0 3 0x100082 sbwait syslogd 68694 187264 1 0 3 0x100080 kqread resolvd 74624 238463 6879 77 3 0x100092 kqread dhcpleased 64632 354007 6879 77 3 0x100092 kqread dhcpleased 6879 474773 1 0 3 0x80 kqread dhcpleased 13904 512398 0 0 3 0x14200 bored smr 56767 114444 0 0 2 0x14200 zerothread 35308 11229 0 0 3 0x14200 aiodoned aiodoned 83381 428613 0 0 3 0x14200 syncer update 22697 375837 0 0 3 0x14200 cleaner cleaner 85038 152686 0 0 3 0x14200 reaper reaper 78047 436024 0 0 3 0x14200 pgdaemon pagedaemon 97605 39893 0 0 3 0x14200 bored viomb 83435 259594 0 0 3 0x40014200 acpi0 acpi0 73288 266783 0 0 3 0x40014200 idle1 35818 274792 0 0 3 0x14200 bored softnet1 96996 156326 0 0 3 0x14200 bored softnet0 48904 116108 0 0 3 0x14200 bored systqmp 70106 171235 0 0 3 0x14200 bored systq 24533 378802 0 0 3 0x14200 tmoslp softclockmp 94776 271016 0 0 3 0x40014200 tmoslp softclock 28519 78174 0 0 3 0x40014200 idle0 1 306287 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex amapchunkpl r = 0 (0xffffffff838bf7e8) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 amap_alloc1+0x330 sys/uvm/uvm_amap.c:-1 #4 amap_copy+0x24b sys/uvm/uvm_amap.c:-1 #5 uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 #6 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #9 recall_trap+0x8 Process 65629 (syz-executor) thread 0xffff8000fffde028 (489851) exclusive rwlock vmmaplk r = 0 (0xfffffd806c9d4aa0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 exclusive mutex amapchunkpl r = 0 (0xffffffff838bf7e8) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 amap_alloc1+0x330 sys/uvm/uvm_amap.c:-1 #4 amap_copy+0x24b sys/uvm/uvm_amap.c:-1 #5 uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 #6 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #9 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11100 12193K 13941K 166960K 13782 0 pcb 19 16K 18K 166960K 860 0 rtable 240 13K 13K 166960K 659 0 pf 39 18K 20K 166960K 299 0 ifaddr 40 7K 8K 166960K 167 0 ifgroup 66 2K 3K 166960K 307 0 sysctl 4 1K 9K 166960K 15 0 counters 74 37K 39K 166960K 366 0 ioctlops 0 0K 4K 166960K 2016 0 iov 0 0K 32K 166960K 154 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1496 94K 94K 166960K 3345 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 25 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 194 0 dirhash 12 2K 3K 166960K 51 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 73K 244K 166960K 2234 0 sigio 1 0K 0K 166960K 33 0 proc 74 131K 147K 166960K 820 0 subproc 81 5K 5K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 345 0 in_multi 78 5K 6K 166960K 213 0 ether_multi 1 0K 0K 166960K 19 0 mrt 1 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 785 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 281 163K 178K 166960K 22310 0 UVM aobj 18 20K 20K 166960K 24 0 pinsyscall 46 92K 106K 166960K 3389 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 171 0 NDP 14 0K 1K 166960K 124 0 temp 80 8684K 8752K 166960K 113511 0 kqueue 16 26K 30K 166960K 403 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 120 379 0 375 5 4 1 3 0 8 0 rtentry 176 194 0 102 5 0 5 5 0 8 0 unpcb 144 1724 0 1706 15 11 4 8 0 8 3 syncache 336 11 0 11 3 2 1 1 0 8 1 tcpqe 32 38 0 38 3 2 1 1 0 8 1 tcpcb 736 887 0 881 19 12 7 7 0 8 6 arp 136 38 0 17 1 0 1 1 0 8 0 inpcb 328 3079 0 3061 28 18 10 12 0 8 8 nd6 152 37 0 15 1 0 1 1 0 8 0 pkpcb 40 14 0 14 3 2 1 1 0 8 1 kcovpl 48 11 0 2 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 122 0 122 2 1 1 1 0 8 1 pppxif 1504 10 0 10 4 4 0 1 0 8 0 pffrag 232 42 0 39 1 0 1 1 0 482 0 pffrnode 88 42 0 39 1 0 1 1 0 8 0 pffrent 40 87 0 84 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 2 0 2 2 1 1 1 0 8 1 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 5 0 2 5 2 3 4 0 8 0 art_heap4 256 777 0 398 32 3 29 29 0 8 3 art_table 40 782 0 400 5 0 5 5 0 8 0 art_node 32 194 0 114 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 8 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 152 0 142 1 0 1 1 0 8 0 shmpl 112 7 0 1 1 0 1 1 0 8 0 dirhash 1024 43 0 26 3 0 3 3 0 8 0 dino2pl 256 5961 0 4446 96 0 96 96 0 8 0 ffsino 296 5961 0 4446 118 0 118 118 0 8 0 nchpl 144 8970 0 7260 64 0 64 64 0 8 0 rtmask 32 27 0 27 3 2 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 32370 0 32370 4 3 1 2 0 8 1 percpumem 16 198 0 146 1 0 1 1 0 8 0 vcpupl 3968 10 0 1 2 0 2 2 0 8 0 vmpool 848 13 0 4 1 0 1 1 0 8 0 kstatmem 264 212 0 178 3 0 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 12 0 12 2 1 1 1 0 8 1 scxspl 216 59815 0 59815 17 16 1 8 1 8 1 plimitpl 152 701 0 681 1 0 1 1 0 8 0 sigapl 424 2493 0 2443 8 2 6 8 0 8 0 knotepl 120 605 0 0 18 0 18 18 0 8 0 kqueuepl 224 905 0 890 14 5 9 9 0 8 8 pipepl 344 339 0 308 4 0 4 4 0 8 0 fdescpl 528 2450 0 2416 3 0 3 3 0 8 0 filepl 160 18112 0 17864 31 12 19 20 0 8 7 lockfpl 104 743 0 740 2 1 1 2 0 8 0 lockfspl 48 281 0 278 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 64 0 46 1 0 1 1 0 8 0 ucredpl 104 3148 0 3135 1 0 1 1 0 8 0 zombiepl 144 2446 0 2443 1 0 1 1 0 8 0 processpl 1232 2493 0 2443 6 1 5 6 0 8 0 procpl 664 5991 0 5933 8 1 7 8 0 8 1 sosppl 176 21 0 20 4 3 1 1 0 8 0 sockpl 752 5358 0 5318 52 39 13 22 0 8 8 mcl64k 65536 7 0 0 1 0 1 1 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 138 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 40 0 0 4 0 4 4 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1174 0 0 72 0 72 72 0 8 0 bufpl 280 24527 0 18391 439 0 439 439 0 8 0 anonpl 32 15093 0 0 122 0 122 122 0 246 0 amapchunkpl 152 74897 0 74249 53 18 35 38 0 158 5 amappl16 200 8742 0 8670 58 41 17 38 0 8 2 amappl15 192 8 0 7 1 0 1 1 0 8 0 amappl14 184 21 0 21 2 1 1 1 0 8 1 amappl13 176 459 0 457 1 0 1 1 0 8 0 amappl12 168 2847 0 2802 3 0 3 3 0 8 0 amappl11 160 4 0 4 2 2 0 1 0 8 0 amappl10 152 48 0 34 1 0 1 1 0 8 0 amappl9 144 278 0 278 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 95 0 93 1 0 1 1 0 8 0 amappl6 120 323 0 305 1 0 1 1 0 8 0 amappl5 112 90 0 79 1 0 1 1 0 8 0 amappl4 104 472 0 438 1 0 1 1 0 8 0 amappl3 96 12989 0 12882 3 0 3 3 0 8 0 amappl2 88 2616 0 2535 2 0 2 2 0 8 0 amappl1 80 19687 0 19066 17 2 15 15 0 8 0 amappl 88 21140 0 20942 5 0 5 5 0 92 0 uvmvnodes 80 187 0 0 4 0 4 4 0 8 0 dma65536 65536 2 0 2 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 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 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 256 0 256 3 3 0 1 0 8 0 dma64 64 7 0 7 2 2 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 23 0 6 1 0 1 1 0 8 0 uaddrrnd 24 2450 0 2416 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2450 0 2416 1 0 1 1 0 8 0 vmmpekpl 168 21157 0 21097 3 0 3 3 0 8 0 vmmpepl 168 160892 0 158763 125 21 104 118 0 357 5 vmsppl 488 2449 0 2416 5 0 5 5 0 8 0 rwobjpl 80 43766 0 42511 39 8 31 37 0 8 0 pdppl 4096 4933 0 4849 122 36 86 86 0 8 2 pvpl 32 24372 0 0 197 0 197 197 0 265 0 pmappl 256 2462 0 2420 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 390 0 67 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83854ff0) 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+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,2d) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(2d) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8335447d) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83413b49) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003a3fc700,48) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003a3fc700) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003a3fc850, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83854ff0) 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+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,2d) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(2d) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8335447d) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83413b49) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003a3fc700,48) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003a3fc700) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b witness_checkorder(28,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_unbind(ffff80000159f030,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000167f000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 dtclose(11e5f,2,2000,ffff80002a2afca0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff80002a2afca0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003a3fca30) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d5b51c8,2,fffffd80097fd0d0,ffff80002a2afca0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8065a593a8,ffff80002a2afca0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8065a593a8,ffff80002a2afca0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8065a593a8,ffff80002a2afca0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8065a593a8,ffff80002a2afca0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a2afca0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a2afca0,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a2afca0,ffff80003a3fcda0,ffff80003a3fccf0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003a3fcda0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3fcda0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76d660a22510, count: -29 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: 0x7e900540d540, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7e900540d540, count: -1