*cpu1: uvm_fault(0xfffffd806c9387c0, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7def10f8e3f0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a39b4c0 rbx 0 rdx 0 rcx 0xffff8000fffed4e0 rax 0x2a r8 0xffff80002a39b3f0 r9 0 r10 0x576ac64307b506e4 r11 0x491153eed78abf41 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff814cd4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a39b440 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=73331 pid=89284 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=0xffff8000fffecfb0,0xffffffff838b93f0 process=0xffff80003c4321e0 user=0xffff80002a396000, vmspace=0xfffffd806c9383f0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *89284 73331 80341 0 7 0 syz-executor 74486 12337 89396 0 2 0 syz-executor 43236 117789 88783 0 3 0x80 nanoslp syz-executor 43236 340155 88783 0 3 0x4000080 nanoslp syz-executor 9557 251824 92614 0 2 0 syz-executor 38229 493009 48597 0 3 0x80 nanoslp syz-executor 38229 273983 48597 0 3 0x4000000 smrbar syz-executor 38229 349797 48597 0 3 0x4000080 fsleep syz-executor 88783 215805 26038 0 3 0x82 nanoslp syz-executor 66034 238965 26038 0 3 0x82 nanoslp syz-executor 49333 135309 0 0 3 0x14200 acct acct 647 476035 1 0 3 0x100083 ttyin getty 37140 465242 26038 0 3 0x2 biowait syz-executor 80341 59066 26038 0 3 0x82 nanoslp syz-executor 11777 85186 26038 0 3 0x2 biowait syz-executor 92614 303654 26038 0 3 0x82 nanoslp syz-executor 48597 167781 26038 0 3 0x82 nanoslp syz-executor 89396 184392 26038 0 3 0x82 nanoslp syz-executor 26038 5386 87500 0 3 0x82 kqread syz-executor 87500 193241 39323 0 3 0x10008a sigsusp ksh 39323 295895 17170 0 3 0x98 kqread sshd-session 17170 104403 39990 0 3 0x92 kqread sshd-session 39990 454882 1 0 3 0x88 kqread sshd 794 122304 9927 74 3 0x1100092 bpf pflogd 9927 519483 1 0 3 0x80 sbwait pflogd 5447 237625 65430 73 3 0x1100090 kqread syslogd 65430 347826 1 0 3 0x100082 sbwait syslogd 15371 187556 1 0 3 0x100080 kqread resolvd 9160 290083 75174 77 3 0x100092 kqread dhcpleased 20117 502207 75174 77 3 0x100092 kqread dhcpleased 75174 133568 1 0 3 0x80 kqread dhcpleased 95988 136454 0 0 3 0x14200 bored smr 92844 96130 0 0 2 0x14200 zerothread 97275 312723 0 0 3 0x14200 aiodoned aiodoned 4793 33088 0 0 3 0x14200 syncer update 65150 11706 0 0 3 0x14200 cleaner cleaner 94570 24897 0 0 3 0x14200 reaper reaper 99078 288105 0 0 3 0x14200 pgdaemon pagedaemon 88044 63045 0 0 3 0x14200 bored viomb 59224 295752 0 0 3 0x40014200 acpi0 acpi0 54005 513210 0 0 3 0x40014200 idle1 96467 165552 0 0 3 0x14200 bored softnet1 91758 81195 0 0 3 0x14200 bored softnet0 46621 479850 0 0 3 0x14200 smrbar systqmp 26526 136635 0 0 3 0x14200 bored systq 27494 454341 0 0 3 0x14200 tmoslp softclockmp 83585 67122 0 0 3 0x40014200 tmoslp softclock 10388 97271 0 0 3 0x40014200 idle0 1 214979 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 (0xffffffff838d02d8) #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_upper_lookup+0x24d sys/uvm/uvm_fault.c:982 #4 uvm_fault+0x159 sys/uvm/uvm_fault.c:638 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 Process 89284 (syz-executor) thread 0xffff8000fffed4e0 (73331) Process 38229 (syz-executor) thread 0xffff80003b3f54e8 (273983) Process 37140 (syz-executor) thread 0xffff80002a27f4d8 (465242) Process 11777 (syz-executor) thread 0xffff80002a27fca0 (85186) Process 46621 (systqmp) thread 0xffff8000ffffe000 (479850) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10244 11077K 11400K 166960K 12694 0 pcb 17 12K 12K 166960K 238 0 rtable 192 9K 10K 166960K 604 0 pf 38 18K 22K 166960K 217 0 ifaddr 36 6K 8K 166960K 118 0 ifgroup 59 2K 2K 166960K 211 0 sysctl 4 1K 9K 166960K 21 0 counters 72 37K 38K 166960K 210 0 ioctlops 0 0K 4K 166960K 1771 0 iov 0 0K 28K 166960K 67 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1403 88K 89K 166960K 2541 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 24 0 VM map 2 1K 1K 166960K 2 0 sem 16 136K 136K 166960K 38 0 dirhash 66 11K 14K 166960K 1353 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 1554 0 sigio 0 0K 0K 166960K 42 0 proc 72 115K 147K 166960K 773 0 subproc 72 4K 4K 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 222 0 in_multi 66 4K 7K 166960K 193 0 ether_multi 1 0K 0K 166960K 20 0 mrt 1 0K 0K 166960K 30 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 679 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 222 158K 178K 166960K 15857 0 UVM aobj 113 142K 144K 166960K 121 0 pinsyscall 41 82K 103K 166960K 2740 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 92 0 NDP 13 0K 2K 166960K 85 0 temp 81 8676K 8747K 166960K 61136 0 kqueue 14 20K 32K 166960K 317 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 120 213 0 209 3 2 1 3 0 8 0 rtentry 176 176 0 103 6 0 6 6 0 8 0 unpcb 144 873 0 856 7 6 1 6 0 8 0 syncache 336 9 0 9 4 3 1 1 0 8 1 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 628 0 622 19 13 6 7 0 8 5 arp 136 26 0 13 1 0 1 1 0 8 0 inpcb 328 1618 0 1608 20 14 6 10 0 8 4 nd6 152 36 0 20 1 0 1 1 0 8 0 pkpcb 40 4 0 4 3 2 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 1 1 1 0 8 1 ppxss 1192 50 0 50 3 2 1 1 0 8 1 pppxif 1504 7 0 7 3 2 1 1 0 8 1 pffrag 232 19 0 7 1 0 1 1 0 482 0 pffrnode 88 14 0 3 1 0 1 1 0 8 0 pffrent 40 33 0 21 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 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pfstitem 24 89 0 27 1 0 1 1 0 8 0 pfstkey 128 89 0 27 2 0 2 2 0 8 0 pfstate 448 88 0 27 7 0 7 7 0 8 0 pfrule 1344 29 0 24 2 1 1 2 0 8 0 rttmr 136 7 0 7 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 687 0 322 30 3 27 30 0 8 2 art_table 40 691 0 322 5 0 5 5 0 8 0 art_node 32 175 0 109 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 31 0 17 1 0 1 1 0 8 0 shmpl 112 46 0 6 2 0 2 2 0 8 0 dirhash 1024 467 0 432 5 0 5 5 0 8 0 dino2pl 256 4332 0 2823 96 1 95 96 0 8 0 ffsino 296 4332 0 2823 117 0 117 117 0 8 0 nchpl 144 6406 0 4694 64 0 64 64 0 8 0 rtmask 32 9 0 9 4 3 1 1 0 8 1 vnodes 216 4097 0 0 228 0 228 228 0 8 0 namei 1024 22473 0 22472 5 4 1 2 0 8 0 percpumem 16 120 0 69 1 0 1 1 0 8 0 vcpupl 3968 71 0 1 9 0 9 9 0 8 0 vmpool 840 72 0 2 8 0 8 8 0 8 0 kstatmem 264 128 0 98 4 1 3 3 0 8 0 scsiplug 72 4 0 4 3 2 1 1 0 8 1 scxspl 216 44533 0 44531 11 10 1 8 1 8 0 plimitpl 152 417 0 399 1 0 1 1 0 8 0 sigapl 424 1820 0 1773 7 1 6 7 0 8 0 knotepl 120 793 0 0 24 0 24 24 0 8 0 kqueuepl 224 529 0 518 4 3 1 3 0 8 0 pipepl 344 325 0 297 9 6 3 9 0 8 0 fdescpl 528 1794 0 1764 3 0 3 3 0 8 0 filepl 160 11466 0 11245 29 17 12 21 0 8 1 lockfpl 104 584 0 582 1 0 1 1 0 8 0 lockfspl 48 228 0 226 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 52 0 35 1 0 1 1 0 8 0 ucredpl 104 2214 0 2199 1 0 1 1 0 8 0 zombiepl 144 1974 0 1973 1 0 1 1 0 8 0 processpl 1232 1820 0 1773 7 2 5 5 0 8 0 procpl 664 4141 0 4091 6 0 6 6 0 8 0 sosppl 176 13 0 13 4 3 1 1 0 8 1 sockpl 752 2822 0 2791 39 30 9 22 0 8 4 mcl64k 65536 22 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 35 0 0 5 0 5 5 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 1778 0 0 112 0 112 112 0 8 0 bufpl 280 18064 0 11928 439 0 439 439 0 8 0 anonpl 32 12590 0 0 102 0 102 102 0 246 0 amapchunkpl 152 53848 0 53430 49 16 33 34 0 158 11 amappl16 200 6905 0 6871 55 36 19 27 0 8 10 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 3 0 3 2 1 1 1 0 8 1 amappl13 176 461 0 460 1 0 1 1 0 8 0 amappl12 168 2197 0 2154 3 0 3 3 0 8 0 amappl11 160 10 0 10 1 1 0 1 0 8 0 amappl10 152 62 0 48 1 0 1 1 0 8 0 amappl9 144 250 0 249 1 0 1 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 93 0 92 1 0 1 1 0 8 0 amappl6 120 356 0 343 1 0 1 1 0 8 0 amappl5 112 97 0 85 1 0 1 1 0 8 0 amappl4 104 460 0 432 1 0 1 1 0 8 0 amappl3 96 10528 0 10434 5 1 4 4 0 8 0 amappl2 88 619 0 559 2 0 2 2 0 8 0 amappl1 80 16693 0 16104 19 4 15 15 0 8 0 amappl 88 14749 0 14603 5 0 5 5 0 92 0 uvmvnodes 80 157 0 0 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 2 1 1 0 8 1 dma64 64 6 0 6 1 1 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 72 120 0 8 3 0 3 3 0 8 0 uaddrrnd 24 1794 0 1764 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1794 0 1764 1 0 1 1 0 8 0 vmmpekpl 168 16023 0 15971 4 1 3 3 0 8 0 vmmpepl 168 121705 0 119874 126 17 109 109 0 357 5 vmsppl 488 1793 0 1764 6 1 5 5 0 8 0 rwobjpl 80 34797 0 33632 36 1 35 35 0 8 1 pdppl 4096 3740 0 3602 184 40 144 144 0 8 6 pvpl 32 21447 0 0 174 1 173 173 0 265 0 pmappl 256 1865 0 1766 7 0 7 7 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 504 0 68 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: 0x7def10f8e3f0, 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,20) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0x250 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(ffffffff8334ebe6) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83413c02) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a393440,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a393440) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001493000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 end trace frame: 0xffff80002a393570, 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,20) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0x250 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(ffffffff8334ebe6) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83413c02) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a393440,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a393440) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001493000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003b3f4028) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003b3f4028) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a3935f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805e9791d8,81,fffffd80097fd478,ffff80003b3f4028) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806ca9f7c0,ffff80003b3f4028) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806ca9f7c0,ffff80003b3f4028) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806ca9f7c0,ffff80003b3f4028) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806ca9f7c0,ffff80003b3f4028) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003b3f4028) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003b3f4028,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003b3f4028,ffff80002a393960,ffff80002a3938b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a393960) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a393960) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x706ef41042e0, count: -25