*cpu0: uvm_fault(0xfffffd806b7337a0, 0x3280, 0, 2) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xc27d2b6e7f0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3a41b0 rbx 0 rdx 0xffff800001668b80 rcx 0xffff8000fffe34a8 rax 0x34 r8 0xffff80002a3a40e0 r9 0xffffffffffffffff r10 0x408db44230d189ff r11 0x1ef5bd023991531f r12 0 r13 0 r14 0xffff8000fffe34a8 r15 0 rip 0xffffffff831e13ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a3a4130 ss 0 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=231581 pid=75038 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe27d8,0xffff8000fffe2a78 process=0xffff8000fffe49d0 user=0xffff80002a39f000, vmspace=0xfffffd806b7335c0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75038 293178 92707 0 2 0x10 syz-executor *75038 231581 92707 0 7 0x4000010 syz-executor 80012 197044 50086 0 2 0xc80 syz-executor 80012 476855 50086 0 7 0x4000000 syz-executor 80012 139272 50086 0 3 0x4000080 fsleep syz-executor 80012 305000 50086 0 3 0x4000080 fsleep syz-executor 88970 415543 49549 0 2 0 syz-executor 88970 399037 49549 0 3 0x4000080 fsleep syz-executor 76174 278712 55706 0 2 0x82000 syz-executor 76174 490562 55706 0 4 0x4082000 syz-executor 76174 419998 55706 0 4 0x4082000 syz-executor 76174 211810 55706 0 3 0x4002000 suspend syz-executor 62238 398729 98016 0 2 0xc80 syz-executor 62238 105743 98016 0 3 0x4000080 sbwait syz-executor 62238 453921 98016 0 3 0x4000080 fsleep syz-executor 51339 412819 49221 0 2 0xc80 syz-executor 51339 70570 49221 0 3 0x4000080 sbwait syz-executor 51339 256644 49221 0 3 0x4000080 fsleep syz-executor 51339 93217 49221 0 3 0x4000080 kqread syz-executor 67354 311036 52549 0 2 0xc80 syz-executor 67354 8840 52549 0 2 0x4000000 syz-executor 67354 501963 52549 0 3 0x4000080 fsleep syz-executor 49221 215644 90216 0 2 0xc82 syz-executor 56519 103753 1 0 3 0x100083 ttyin getty 92707 99331 90216 0 2 0xc82 syz-executor 52549 200392 90216 0 2 0xc82 syz-executor 98016 99815 90216 0 2 0xc82 syz-executor 26483 231692 90216 0 2 0xc82 syz-executor 55706 6870 90216 0 2 0xc82 syz-executor 50086 519760 90216 0 2 0xc82 syz-executor 49549 44254 90216 0 2 0xc82 syz-executor 85424 523798 0 0 3 0x14200 bored sosplice 85374 394191 1229 0 3 0x100082 sbwait arp 1229 257169 1 0 3 0x10008a sigsusp sh 90216 377914 13716 0 3 0x82 kqread syz-executor 13716 287450 93744 0 3 0x10008a sigsusp ksh 93744 148681 39427 0 3 0x98 kqread sshd-session 39427 163708 85729 0 3 0x92 kqread sshd-session 85729 3141 1 0 3 0x88 kqread sshd 79256 502728 4592 74 3 0x1100092 bpf pflogd 4592 209870 1 0 3 0x80 sbwait pflogd 36165 19088 56855 73 3 0x1100090 kqread syslogd 56855 21750 1 0 3 0x100082 sbwait syslogd 66266 446830 1 0 3 0x100080 kqread resolvd 83197 353363 2858 77 3 0x100092 kqread dhcpleased 66032 453487 2858 77 3 0x100092 kqread dhcpleased 2858 67029 1 0 3 0x80 kqread dhcpleased 43440 34965 0 0 3 0x14200 bored smr 88519 520656 0 0 2 0x14200 zerothread 6589 430430 0 0 3 0x14200 aiodoned aiodoned 77158 142329 0 0 3 0x14200 syncer update 99568 193319 0 0 3 0x14200 cleaner cleaner 79620 63641 0 0 3 0x14200 reaper reaper 44764 460568 0 0 3 0x14200 pgdaemon pagedaemon 67481 290633 0 0 3 0x14200 bored viomb 30400 154993 0 0 3 0x40014200 acpi0 acpi0 43206 372568 0 0 3 0x40014200 idle1 58017 90008 0 0 3 0x14200 bored softnet3 42061 407487 0 0 3 0x14200 bored softnet2 16099 493546 0 0 3 0x14200 bored softnet1 91882 26045 0 0 3 0x14200 bored softnet0 5560 470801 0 0 3 0x14200 bored systqmp 38750 142675 0 0 3 0x14200 bored systq 8695 84294 0 0 3 0x14200 tmoslp softclockmp 30629 489431 0 0 2 0x40014200 softclock 5470 362724 0 0 3 0x40014200 idle0 1 40523 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex namei r = 0 (0xffffffff839f8ef0) #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+0x1ad sys/kern/kern_lock.c:296 #2 mtx_enter+0x62 sys/kern/kern_lock.c:253 #3 pool_put+0xa6 sys/kern/subr_pool.c:796 #4 ufs_makeinode+0x5eb sys/ufs/ufs/ufs_vnops.c:1772 #5 ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 #6 VOP_MKNOD+0x102 sys/kern/vfs_vops.c:121 #7 domknodat+0x47e sys/kern/vfs_syscalls.c:1636 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 Process 75038 (syz-executor) thread 0xffff8000fffe34a8 (231581) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10269 11191K 12475K 166960K 18434 0 pcb 17 16K 30K 166960K 2330 0 rtable 251 17K 18K 166960K 3155 0 pf 48 20K 67488K 166960K 944 0 ifaddr 45 11K 12K 166960K 611 0 ifgroup 65 2K 3K 166960K 1145 0 sysctl 4 1K 9K 166960K 150 0 counters 74 37K 38K 166960K 1236 0 ioctlops 0 0K 8K 166960K 4039 0 iov 1 12K 28K 166960K 979 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1557 98K 98K 166960K 8356 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 36K 44K 166960K 199 0 VM map 2 1K 1K 166960K 2 0 sem 20 29K 45K 166960K 133 0 dirhash 12 2K 3K 166960K 264 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 73K 244K 166960K 11642 0 sigio 0 0K 0K 166960K 262 0 proc 73 91K 152K 166960K 2742 0 subproc 81 5K 5K 166960K 411 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 1930 0 in_multi 73 5K 7K 166960K 973 0 ether_multi 1 0K 0K 166960K 145 0 mrt 1 0K 0K 166960K 71 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 3034 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 50 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 281 156K 175K 166960K 101382 0 UVM aobj 130 4K 4K 166960K 144 0 pinsyscall 46 92K 107K 166960K 13780 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 727 0 NDP 15 0K 1K 166960K 443 0 temp 158 8697K 8953K 166960K 492831 0 kqueue 16 26K 33K 166960K 2013 0 SYN cache 2 10K 18K 166960K 3 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 1292 0 1286 13 10 3 3 0 8 2 rtentry 176 998 0 904 7 1 6 6 0 8 0 unpcb 144 8173 0 8148 48 42 6 6 0 8 5 syncache 336 39 0 39 11 11 0 1 0 8 0 tcpqe 32 11 0 11 7 7 0 1 0 8 0 tcpcb 808 3975 0 3970 68 60 8 8 0 8 7 arp 128 170 0 142 1 0 1 1 0 8 0 inpcb 328 13207 0 13196 71 62 9 13 0 8 8 nd6 144 174 0 154 2 1 1 2 0 8 0 pkpcb 40 121 0 121 7 6 1 1 0 8 1 kcovpl 48 45 0 36 1 0 1 1 0 8 0 mppekey 1024 7 0 7 6 6 0 1 0 8 0 ppxss 1192 425 0 424 5 4 1 1 0 8 0 pppxif 1504 72 0 72 12 11 1 1 0 8 1 pfstscr 40 34 0 34 1 1 0 1 0 8 0 pffrag 232 160 0 147 3 1 2 2 0 482 0 pffrnode 88 156 0 144 1 0 1 1 0 8 0 pffrent 40 336 0 322 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 8 0 7 1 0 1 1 0 8 0 pfanchor 1288 4 0 1 1 0 1 1 0 8 0 pftag 88 4 0 2 1 0 1 1 0 8 0 pfstitem 24 758 0 609 2 0 2 2 0 8 0 pfstkey 128 826 0 679 8 0 8 8 0 8 0 pfstate 384 789 0 643 24 2 22 24 0 8 1 pfrule 1344 37 0 25 5 4 1 2 0 8 0 rttmr 136 15 0 15 8 8 0 1 0 8 0 art_heap8 4096 9 0 5 8 4 4 5 0 8 0 art_heap4 256 3863 0 3532 63 38 25 34 0 8 0 art_table 32 3872 0 3537 6 1 5 5 0 8 0 art_node 16 876 0 805 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0 semupl 112 4 0 4 3 3 0 1 0 8 0 semapl 112 126 0 108 1 0 1 1 0 8 0 shmpl 112 141 0 14 4 0 4 4 0 8 0 dirhash 1024 189 0 172 3 0 3 3 0 8 0 dino2pl 256 22268 0 20669 102 1 101 101 0 8 0 ffsino 288 22268 0 20669 115 0 115 115 0 8 0 nchpl 144 38181 0 37542 66 38 28 66 0 8 0 rtmask 32 62 0 62 13 12 1 1 0 8 1 uvmvnodes 80 12300 0 0 252 0 252 252 0 8 0 vnodes 216 12300 0 0 684 0 684 684 0 8 0 namei 1024 148591 0 148591 9 8 1 2 0 8 1 percpumem 16 633 0 581 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 702 0 666 4 1 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 48 0 48 12 11 1 1 0 8 1 scxspl 216 127951 0 127951 31 30 1 8 1 8 1 plimitpl 152 2498 0 2478 1 0 1 1 0 8 0 sigapl 424 11943 0 11890 11 2 9 9 0 8 0 knotepl 120 746 0 0 18 0 18 18 0 8 0 kqueuepl 224 4714 0 4701 36 34 2 5 0 8 0 pipepl 336 2001 0 1971 41 35 6 8 0 8 3 fdescpl 520 11839 0 11805 3 0 3 3 0 8 0 filepl 160 90832 0 90582 79 60 19 21 0 8 5 lockfpl 104 4698 0 4695 7 6 1 2 0 8 0 lockfspl 48 1444 0 1441 1 0 1 1 0 8 0 sessionpl 144 100 0 91 1 0 1 1 0 8 0 pgrppl 48 319 0 301 1 0 1 1 0 8 0 ucredpl 104 17408 0 17393 1 0 1 1 0 8 0 zombiepl 144 12883 0 12882 2 1 1 1 0 8 0 processpl 1240 11943 0 11890 6 1 5 6 0 8 0 procpl 656 29922 0 29854 8 1 7 8 0 8 0 srpgc 96 78 0 78 15 14 1 1 0 8 1 sosppl 168 75 0 75 15 14 1 1 0 8 1 sockpl 728 23271 0 23190 114 96 18 23 0 8 8 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 146 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 144 0 0 11 1 10 10 0 8 0 mtagpl 96 29 0 0 1 0 1 1 0 8 0 mbufpl 256 2592 0 0 152 0 152 152 0 8 0 bufpl 280 34612 0 28470 440 0 440 440 0 8 0 anonpl 32 19159 0 0 154 0 154 154 0 246 0 amapchunkpl 152 358104 0 357360 99 63 36 41 0 158 4 amappl16 200 22840 0 22411 149 118 31 40 0 8 8 amappl15 192 6 0 5 1 0 1 1 0 8 0 amappl14 184 297 0 284 1 0 1 1 0 8 0 amappl13 176 11 0 11 6 6 0 1 0 8 0 amappl12 168 13079 0 13044 4 2 2 3 0 8 0 amappl11 160 52 0 37 1 0 1 1 0 8 0 amappl10 152 6 0 5 2 1 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 29 0 26 1 0 1 1 0 8 0 amappl7 128 225 0 211 1 0 1 1 0 8 0 amappl6 120 616 0 611 1 0 1 1 0 8 0 amappl5 112 266 0 255 1 0 1 1 0 8 0 amappl4 104 582 0 560 1 0 1 1 0 8 0 amappl3 96 76461 0 76329 5 1 4 4 0 8 0 amappl2 88 1444 0 1376 2 0 2 2 0 8 0 amappl1 80 64787 0 64155 15 0 15 15 0 8 0 amappl 88 97897 0 97695 5 0 5 5 0 92 0 dma32768 32768 3 0 3 3 3 0 1 0 8 0 dma8192 8192 2 0 2 2 2 0 1 0 8 0 dma4096 4096 4 0 4 3 3 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 128 269 0 269 11 10 1 1 0 8 1 dma64 64 13 0 13 6 5 1 1 0 8 1 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 22 0 21 1 0 1 1 0 8 0 aobjpl 72 143 0 14 3 0 3 3 0 8 0 uaddrrnd 24 11839 0 11805 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11839 0 11805 1 0 1 1 0 8 0 vmmpekpl 168 78070 0 77998 4 0 4 4 0 8 0 vmmpepl 168 732832 0 730219 174 50 124 126 0 357 3 vmsppl 480 11838 0 11805 5 0 5 5 0 8 0 rwobjpl 72 171659 0 157805 268 12 256 256 0 8 2 pdppl 4096 23685 0 23610 201 126 75 87 0 8 0 pvpl 32 28502 0 0 228 0 228 228 0 265 0 pmappl 256 11838 0 11805 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 827 0 303 16 0 16 16 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8382eff0) 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+0x77 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x77 sys/dev/acpi/acpitimer.c:120 comcnputc(800,20) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x524 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x524 sys/ddb/db_output.c:153 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8340a9a7) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833ab785) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80003c4340a0,3280) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80003c4340a0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c434410, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8382eff0) 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+0x77 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x77 sys/dev/acpi/acpitimer.c:120 comcnputc(800,20) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x524 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x524 sys/ddb/db_output.c:153 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff8340a9a7) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833ab785) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80003c4340a0,3280) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80003c4340a0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 syscall(ffff80003c4344f0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4344f0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x63df850f670, count: -17 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0xc27d2b6e7f0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xc27d2b6e7f0, count: -1