*cpu1: uvm_fault(0xffffffff839dc9b0, 0xffff80000178800a, 0, 1) -> e ddb{0}> trace alltraps_kern_meltdown() at alltraps_kern_meltdown+0xb8 _copyin() at _copyin+0x57 syscall(ffff80003c499e60) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c499e60) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe3a0a6a5d10, count: -4 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c499a90 rbx 0 rdx 0xffff800001485b40 rcx 0xffff80003c455750 rax 0x2a r8 0xffff80003c4999c0 r9 0x1 r10 0xe78a3ab82fbd1af6 r11 0x29d32aa853e58ab2 r12 0x100 r13 0x16 r14 0x200000019f40 r15 0xfffffd806c9138e0 rip 0xffffffff8332820b alltraps_kern_meltdown+0xb8 cs 0x8 rflags 0x246 rsp 0xffff80003c499a10 ss 0x10 alltraps_kern_meltdown+0xb8: movl %ebx,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=169880 pid=27084 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=84, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c454560,0xffff80003c449c70 process=0xffff8000fffe78c8 user=0xffff80003c494000, vmspace=0xfffffd806ebe23c8 estcpu=34, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37570 318651 2702 0 2 0 syz-executor 37570 492538 2702 0 3 0x4000080 fsleep syz-executor 24934 395055 50851 0 2 0 syz-executor 24934 410435 50851 0 2 0x4000000 syz-executor 88797 238624 14803 0 2 0 syz-executor 88797 309031 14803 0 2 0x4000000 syz-executor 27747 255955 21104 0 2 0x3000 syz-executor 27084 245060 33632 0 2 0 syz-executor *27084 169880 33632 0 7 0x4000000 syz-executor 34918 28184 8923 0 2 0 syz-executor 34918 202807 8923 0 7 0x4000000 syz-executor 34918 61020 8923 0 3 0x4000080 fsleep syz-executor 34918 108700 8923 0 3 0x4000080 fsleep syz-executor 85341 263979 28850 0 3 0x80 nanoslp syz-executor 85341 113725 28850 0 3 0x4000080 ttyin syz-executor 85341 472182 28850 0 3 0x4000080 fsleep syz-executor 21104 285799 33467 0 2 0x2 syz-executor 2702 387026 33467 0 3 0x82 nanoslp syz-executor 21296 105698 1 0 3 0x80 nanoslp init 6918 405736 0 0 3 0x14200 acct acct 8923 41039 33467 0 2 0x3 syz-executor 14803 142379 33467 0 2 0x3 syz-executor 55985 339860 33467 0 3 0x82 wait syz-executor 28850 163392 33467 0 2 0x3 syz-executor 33632 165210 33467 0 2 0x2 syz-executor 50851 15893 33467 0 2 0x3 syz-executor 4858 312196 0 0 3 0x14200 bored sosplice 33467 162100 48353 0 3 0x82 kqread syz-executor 48353 255378 4199 0 3 0x10008a sigsusp ksh 4199 62760 37632 0 3 0x98 kqread sshd-session 37632 136226 55334 0 3 0x92 kqread sshd-session 55334 205283 1 0 3 0x88 kqread sshd 50957 10231 47853 74 3 0x1100092 bpf pflogd 47853 18224 1 0 3 0x80 sbwait pflogd 41523 313805 53150 73 3 0x1100090 kqread syslogd 53150 363312 1 0 3 0x100082 sbwait syslogd 96531 199203 1 0 3 0x100080 kqread resolvd 9763 71338 6327 77 3 0x100092 kqread dhcpleased 22801 113467 6327 77 3 0x100092 kqread dhcpleased 6327 461928 1 0 3 0x80 kqread dhcpleased 10871 229556 0 0 3 0x14200 bored smr 96520 269839 0 0 2 0x14200 zerothread 35058 359178 0 0 3 0x14200 aiodoned aiodoned 28875 341668 0 0 3 0x14200 syncer update 28748 348665 0 0 3 0x14200 cleaner cleaner 27050 511865 0 0 3 0x14200 reaper reaper 65678 29366 0 0 3 0x14200 pgdaemon pagedaemon 95228 134486 0 0 3 0x14200 bored viomb 26262 281225 0 0 3 0x40014200 acpi0 acpi0 78334 496306 0 0 3 0x40014200 idle1 33931 296282 0 0 3 0x14200 bored softnet3 58827 485506 0 0 3 0x14200 bored softnet2 92495 171427 0 0 3 0x14200 bored softnet1 16216 407891 0 0 3 0x14200 bored softnet0 8213 208410 0 0 2 0x14200 systqmp 57051 309169 0 0 3 0x14200 bored systq 45731 146092 0 0 3 0x14200 tmoslp softclockmp 21036 15865 0 0 3 0x40014200 tmoslp softclock 5008 255768 0 0 3 0x40014200 idle0 1 324551 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd800865d080) #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_test_attrs+0xac sys/arch/amd64/amd64/pmap.c:-1 #4 uvm_pagedeactivate+0x28b sys/uvm/uvm_page.c:1292 #5 uvn_flush+0x4e9 sys/uvm/uvm_vnode.c:-1 #6 uvm_fault_check+0xd32 sys/uvm/uvm_fault.c:898 #7 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #8 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #9 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #10 alltraps_kern_meltdown+0x7b #11 _copyin+0x57 #12 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #13 Xsyscall+0x128 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff839d4b40) #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 uvn_flush+0x1ed sys/uvm/uvm_vnode.c:-1 #4 uvm_fault_check+0xd32 sys/uvm/uvm_fault.c:898 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #6 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #7 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #8 alltraps_kern_meltdown+0x7b #9 _copyin+0x57 #10 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #11 Xsyscall+0x128 Process 27084 (syz-executor) thread 0xffff80003c455750 (169880) Process 34918 (syz-executor) thread 0xffff80003c455230 (202807) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10265 11070K 12824K 166960K 19491 0 pcb 17 22K 36K 166960K 1176 0 rtable 271 16K 16K 166960K 1986 0 pf 43 19K 82K 166960K 462 0 ifaddr 46 9K 10K 166960K 346 0 ifgroup 68 2K 3K 166960K 548 0 sysctl 4 1K 5K 166960K 13 0 counters 72 37K 38K 166960K 692 0 ioctlops 0 0K 4K 166960K 2436 0 iov 0 0K 24K 166960K 350 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1652 104K 104K 166960K 6734 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 93017K 166960K 87 0 VM map 2 1K 1K 166960K 2 0 sem 28 36K 41K 166960K 44 0 dirhash 12 2K 2K 166960K 81 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 5261 0 sigio 0 0K 0K 166960K 67 0 proc 64 79K 128K 166960K 1759 0 subproc 72 4K 4K 166960K 279 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1010 0 in_multi 77 5K 7K 166960K 631 0 ether_multi 1 0K 0K 166960K 50 0 mrt 1 0K 0K 166960K 42 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 301 1341K 1341K 166960K 301 0 exec 0 0K 1K 166960K 1950 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 75 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 251 166K 188K 166960K 47804 0 UVM aobj 16 2K 2K 166960K 16 0 pinsyscall 42 84K 106K 166960K 6997 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 384 0 NDP 15 0K 2K 166960K 243 0 temp 90 8664K 8792K 166960K 162608 0 kqueue 13 20K 40K 166960K 901 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 120 513 0 509 4 3 1 3 0 8 0 rtentry 176 665 0 556 7 1 6 6 0 8 0 unpcb 144 3658 0 3640 20 16 4 6 0 8 3 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 808 1770 0 1765 41 37 4 11 0 8 3 arp 128 91 0 57 2 0 2 2 0 8 0 inpcb 384 6461 0 6452 75 66 9 16 0 8 8 nd6 144 181 0 157 2 0 2 2 0 8 0 pkpcb 40 75 0 75 7 6 1 1 0 8 1 kcovpl 48 31 0 23 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 1 1 1 0 8 1 ppxss 1192 236 0 236 3 2 1 1 0 8 1 pppxif 1504 32 0 32 7 6 1 1 0 8 1 pffrag 232 23 0 14 1 0 1 1 0 482 0 pffrnode 88 20 0 11 1 0 1 1 0 8 0 pffrent 40 45 0 36 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 3 0 3 2 1 1 1 0 8 1 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 406 0 234 2 0 2 2 0 8 0 pfstkey 128 406 0 234 6 0 6 6 0 8 0 pfstate 384 406 0 234 18 0 18 18 0 8 0 pfrule 1344 24 0 17 2 1 1 2 0 8 0 rttmr 136 8 0 8 6 5 1 1 0 8 1 art_heap8 4096 4 0 1 4 1 3 3 0 8 0 art_heap4 256 2941 0 2549 55 21 34 37 0 8 2 art_table 32 2945 0 2550 5 0 5 5 0 8 0 art_node 16 560 0 481 1 0 1 1 0 8 0 sysvmsgpl 40 24 0 16 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 35 0 9 1 0 1 1 0 8 0 shmpl 112 13 0 0 1 0 1 1 0 8 0 dirhash 1024 65 0 48 3 0 3 3 0 8 0 dino2pl 256 11211 0 9659 99 1 98 98 0 8 0 ffsino 288 11211 0 9659 113 1 112 112 0 8 0 nchpl 144 18222 0 16462 66 0 66 66 0 8 0 rtmask 32 18 0 18 7 6 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 70666 0 70666 5 4 1 2 0 8 1 percpumem 16 361 0 310 1 0 1 1 0 8 0 kstatmem 264 326 0 290 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 33 0 33 8 7 1 1 0 8 1 scxspl 216 56341 0 56341 23 20 3 8 1 8 3 plimitpl 152 1144 0 1128 1 0 1 1 0 8 0 sigapl 424 5566 0 5514 11 4 7 9 0 8 0 knotepl 120 649 0 0 18 0 18 18 0 8 0 kqueuepl 224 1949 0 1939 16 14 2 5 0 8 1 pipepl 336 744 0 717 12 9 3 8 0 8 0 fdescpl 520 5511 0 5479 3 0 3 3 0 8 0 filepl 160 40688 0 40471 39 21 18 19 0 8 3 lockfpl 104 1927 0 1925 2 1 1 2 0 8 0 lockfspl 48 709 0 707 1 0 1 1 0 8 0 sessionpl 144 52 0 44 1 0 1 1 0 8 0 pgrppl 48 204 0 188 1 0 1 1 0 8 0 ucredpl 104 7923 0 7907 1 0 1 1 0 8 0 zombiepl 144 6270 0 6268 2 1 1 1 0 8 0 processpl 1208 5566 0 5514 6 1 5 6 0 8 0 procpl 656 13742 0 13681 9 2 7 8 0 8 1 srpgc 96 51 0 51 8 7 1 1 0 8 1 sosppl 168 42 0 42 6 5 1 1 0 8 1 sockpl 728 10873 0 10842 101 90 11 24 0 8 8 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 19 0 0 3 0 3 3 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 13 0 0 2 0 2 2 0 8 0 mcl4k 4096 124 0 0 15 1 14 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 83 0 0 7 1 6 7 0 8 0 mtagpl 96 197 0 0 5 0 5 5 0 8 0 mbufpl 256 8851 0 0 549 0 549 549 0 8 0 bufpl 280 14348 0 8205 440 0 440 440 0 8 0 anonpl 32 12864 0 0 104 0 104 104 0 246 0 amapchunkpl 152 176054 0 175448 74 42 32 38 0 158 3 amappl16 200 10639 0 10567 66 49 17 28 0 8 3 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 172 0 161 1 0 1 1 0 8 0 amappl13 176 45 0 44 1 0 1 1 0 8 0 amappl12 168 6534 0 6503 3 1 2 2 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 245 0 244 2 1 1 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 164 0 152 1 0 1 1 0 8 0 amappl6 120 413 0 409 1 0 1 1 0 8 0 amappl5 112 226 0 215 1 0 1 1 0 8 0 amappl4 104 414 0 394 1 0 1 1 0 8 0 amappl3 96 34866 0 34747 4 0 4 4 0 8 0 amappl2 88 1027 0 964 2 0 2 2 0 8 0 amappl1 80 31040 0 30459 17 2 15 15 0 8 0 amappl 88 45580 0 45402 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma2048 2048 2 0 2 1 1 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 8 0 8 2 2 0 1 0 8 0 dma128 128 258 0 258 6 5 1 1 0 8 1 dma64 64 12 0 12 5 5 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 15 0 0 1 0 1 1 0 8 0 uaddrrnd 24 5511 0 5479 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5511 0 5479 1 0 1 1 0 8 0 vmmpekpl 168 38597 0 38533 4 0 4 4 0 8 0 vmmpepl 168 337091 0 334986 148 46 102 109 0 357 5 vmsppl 480 5510 0 5479 6 1 5 5 0 8 0 rwobjpl 72 82470 0 75567 141 10 131 135 0 8 0 pdppl 4096 11029 0 10958 149 78 71 85 0 8 0 pvpl 32 21501 0 0 172 0 172 172 0 265 0 pmappl 256 5510 0 5479 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 1074 0 163 27 0 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace alltraps_kern_meltdown() at alltraps_kern_meltdown+0xb8 _copyin() at _copyin+0x57 syscall(ffff80003c499e60) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c499e60) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe3a0a6a5d10, count: -4 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: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(800,2c) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(2c) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(2c) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833ff523) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a3b5a) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a395ff0,ffff80000178800a) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a395ff0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80002a396120, 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: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(800,2c) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(2c) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(2c) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833ff523) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a3b5a) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a395ff0,ffff80000178800a) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a395ff0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b arp_rtrequest(ffff800000039058,1,fffffd806303bc90) at arp_rtrequest+0x66f arprequest sys/netinet/if_ether.c:281 [inline] arp_rtrequest(ffff800000039058,1,fffffd806303bc90) at arp_rtrequest+0x66f sys/netinet/if_ether.c:184 rtrequest(1,ffff80002a3962d0,0,ffff80002a396250,0) at rtrequest+0xc5c sys/net/route.c:1117 rtm_output(ffff800001744700,ffff80002a396378,ffff80002a3962d0,0,0) at rtm_output+0x876 sys/net/rtsock.c:973 route_output(fffffd80758fbc00,ffff800001454e48) at route_output+0x9a1 sys/net/rtsock.c:878 route_send(ffff800001454e48,fffffd80758fbc00,0,0) at route_send+0xd7 sys/net/rtsock.c:342 sosend(ffff800001454e48,0,ffff80002a396518,0,0,808) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003c455230,3,ffff80002a396610,808,ffff80002a3966c0) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff80003c455230,ffff80002a396770,ffff80002a3966c0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff80002a396770) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a396770) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xabf93823550, count: -24