*cpu1: uvm_fault(0xfffffd806c94fd70, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7eaa0e8c9ad0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c4cd7c0 rbx 0 rdx 0 rcx 0xffff8000fffeaa80 rax 0x2a r8 0xffff80003c4cd6f0 r9 0x1 r10 0xde56fb2c8a5325cd r11 0x99058ebe690df0da r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82f8e4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c4cd740 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=487131 pid=58116 tcnt=2 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=0xffff8000fffea550,0xffff8000ffffc2b0 process=0xffff80003c4b89d0 user=0xffff80003c4c8000, vmspace=0xfffffd806c94f018 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *58116 487131 66069 0 7 0 syz-executor 58116 504884 66069 0 3 0x4000080 fsleep syz-executor 30537 245403 8532 0 2 0 syz-executor 4472 224722 26803 0 2 0 syz-executor 4472 515423 26803 0 2 0x4000000 syz-executor 95476 15925 28269 0 2 0 syz-executor 95476 19560 28269 0 3 0x4000080 fsleep syz-executor 95476 456348 28269 0 3 0x4000080 fsleep syz-executor 95476 30881 28269 0 3 0x4000080 fsleep syz-executor 53000 85205 98897 0 2 0 syz-executor 53000 457382 98897 0 3 0x4000080 fsleep syz-executor 50504 485057 67530 0 3 0x82 sbwait sshd-session 27607 482634 1 0 3 0x82 nanoslp getty 33832 501312 39679 0 2 0x2 syz-executor 8532 223097 39679 0 3 0x82 nanoslp syz-executor 98897 339273 39679 0 3 0x82 nanoslp syz-executor 62230 390545 0 0 3 0x14200 acct acct 49957 84491 39679 0 3 0x2 biowait syz-executor 66069 505432 39679 0 3 0x82 nanoslp syz-executor 69813 71291 39679 0 3 0x82 nanoslp syz-executor 64714 297544 67530 0 3 0x82 sbwait sshd-session 26803 333470 39679 0 3 0x82 nanoslp syz-executor 69536 13289 0 0 3 0x14280 nfsidl nfsio 96002 470992 0 0 3 0x14280 nfsidl nfsio 6647 272107 0 0 3 0x14280 nfsidl nfsio 94687 164257 0 0 3 0x14280 nfsidl nfsio 33550 199947 0 0 3 0x14280 nfsidl nfsio 95094 489499 0 0 3 0x14280 nfsidl nfsio 77891 474114 0 0 3 0x14280 nfsidl nfsio 37540 133317 0 0 3 0x14280 nfsidl nfsio 59368 170639 0 0 3 0x14280 nfsidl nfsio 45974 205112 0 0 3 0x14280 nfsidl nfsio 89276 290938 0 0 3 0x14280 nfsidl nfsio 18911 33354 0 0 3 0x14280 nfsidl nfsio 75795 268948 0 0 3 0x14280 nfsidl nfsio 14612 157483 0 0 3 0x14280 nfsidl nfsio 46893 205196 0 0 3 0x14280 nfsidl nfsio 92028 128113 0 0 3 0x14280 nfsidl nfsio 57754 433593 0 0 3 0x14280 nfsidl nfsio 29286 141560 0 0 3 0x14280 nfsidl nfsio 18611 362393 0 0 3 0x14280 nfsidl nfsio 66494 203647 0 0 3 0x14280 nfsidl nfsio 28269 118186 39679 0 3 0x82 nanoslp syz-executor 39679 398556 83032 0 2 0x2 syz-executor 83032 180010 48223 0 3 0x10008a sigsusp ksh 48223 20464 61238 0 3 0x98 kqread sshd-session 61238 268222 67530 0 3 0x92 kqread sshd-session 67530 381589 1 0 3 0x88 kqread sshd 54623 347312 31669 74 3 0x1100092 bpf pflogd 31669 433042 1 0 3 0x80 sbwait pflogd 92897 74561 87851 73 3 0x1100090 kqread syslogd 87851 403504 1 0 3 0x100082 sbwait syslogd 23361 16914 1 0 3 0x100080 kqread resolvd 99629 489442 5644 77 3 0x100092 kqread dhcpleased 64608 389327 5644 77 3 0x100092 kqread dhcpleased 5644 203213 1 0 3 0x80 kqread dhcpleased 3376 353499 0 0 3 0x14200 bored smr 34539 427572 0 0 2 0x14200 zerothread 46399 271636 0 0 3 0x14200 aiodoned aiodoned 43970 110260 0 0 3 0x14200 syncer update 7972 310500 0 0 3 0x14200 cleaner cleaner 36627 106259 0 0 3 0x14200 reaper reaper 69277 215322 0 0 3 0x14200 pgdaemon pagedaemon 37766 93105 0 0 3 0x14200 bored viomb 72885 283463 0 0 3 0x40014200 acpi0 acpi0 70904 168038 0 0 3 0x40014200 idle1 48533 166760 0 0 3 0x14200 bored softnet1 97152 196821 0 0 3 0x14200 bored softnet0 31070 470638 0 0 3 0x14200 bored systqmp 80958 425588 0 0 3 0x14200 bored systq 21920 1698 0 0 3 0x14200 tmoslp softclockmp 15921 4418 0 0 3 0x40014200 tmoslp softclock 2275 93093 0 0 3 0x40014200 idle0 1 512422 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8066ef4110) #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 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #3 uvm_fault_lower+0x5d6 sys/uvm/uvm_fault.c:1504 #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:632 #7 recall_trap+0x8 Process 58116 (syz-executor) thread 0xffff8000fffeaa80 (487131) Process 49957 (syz-executor) thread 0xffff80003c46cfc0 (84491) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11116 12219K 13912K 166960K 15946 0 pcb 50 17K 18K 166960K 597 0 rtable 276 14K 14K 166960K 1173 0 pf 36 18K 82K 166960K 307 0 ifaddr 43 9K 10K 166960K 237 0 ifgroup 52 2K 2K 166960K 399 0 sysctl 4 1K 9K 166960K 96 0 counters 70 37K 38K 166960K 544 0 ioctlops 0 0K 4K 166960K 2066 0 iov 0 0K 24K 166960K 193 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1574 99K 99K 166960K 3975 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 42 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 104 0 dirhash 12 2K 2K 166960K 57 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 232K 166960K 2769 0 sigio 0 0K 0K 166960K 59 0 proc 72 115K 180K 166960K 1243 0 subproc 72 4K 4K 166960K 216 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 333 0 in_multi 96 7K 7K 166960K 376 0 ether_multi 1 0K 0K 166960K 29 0 mrt 2 0K 0K 166960K 22 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 930 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 4K 166960K 9 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 256 185K 194K 166960K 26217 0 UVM aobj 88 27K 27K 166960K 98 0 pinsyscall 45 90K 101K 166960K 4368 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 201 0 NDP 12 0K 2K 166960K 180 0 temp 82 8688K 8788K 166960K 121942 0 kqueue 14 22K 32K 166960K 523 0 SYN cache 2 8K 16K 166960K 3 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 120 399 0 396 6 3 3 3 0 8 2 rtentry 176 355 0 246 6 0 6 6 0 8 0 unpcb 144 1729 0 1708 16 10 6 6 0 8 5 syncache 336 16 0 16 7 6 1 1 0 8 1 tcpqe 32 20 0 20 4 3 1 1 0 8 1 tcpcb 736 651 0 641 4 2 2 2 0 8 1 arp 136 57 0 37 1 0 1 1 0 8 0 inpcb 328 2890 0 2841 26 21 5 10 0 8 0 nd6 152 82 0 56 2 0 2 2 0 8 0 pkpcb 40 25 0 25 5 4 1 1 0 8 1 kcovpl 48 24 0 16 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 190 0 190 3 2 1 1 0 8 1 pppxif 1504 12 0 12 5 5 0 1 0 8 0 pffrag 232 18 0 9 1 0 1 1 0 482 0 pffrnode 88 18 0 9 1 0 1 1 0 8 0 pffrent 40 33 0 23 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 2 0 1 0 8 0 pfstkey 128 2 0 2 1 1 0 1 0 8 0 pfstate 448 1 0 1 1 1 0 1 0 8 0 pfrule 1360 4 0 1 1 0 1 1 0 8 0 rttmr 136 5 0 5 5 5 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1553 0 1115 43 15 28 31 0 8 0 art_table 40 1558 0 1115 5 0 5 5 0 8 0 art_node 32 356 0 260 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 10 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 100 0 90 1 0 1 1 0 8 0 shmpl 112 80 0 7 3 0 3 3 0 8 0 dirhash 1024 48 0 31 3 0 3 3 0 8 0 dino2pl 256 6548 0 5011 97 0 97 97 0 8 0 ffsino 296 6548 0 5011 119 0 119 119 0 8 0 nchpl 144 10130 0 8388 65 0 65 65 0 8 0 rtmask 32 30 0 30 4 3 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 36897 0 36897 4 3 1 2 0 8 1 percpumem 16 287 0 237 1 0 1 1 0 8 0 vcpupl 3968 13 0 1 2 0 2 2 0 8 0 vmpool 848 14 0 2 2 0 2 2 0 8 0 kstatmem 264 258 0 232 5 3 2 3 0 8 0 scsiplug 72 9 0 9 6 6 0 1 0 8 0 scxspl 216 88576 0 88575 11 10 1 8 1 8 0 plimitpl 152 794 0 776 1 0 1 1 0 8 0 sigapl 424 3076 0 3007 10 2 8 9 0 8 0 knotepl 120 592 0 0 17 0 17 17 0 8 0 kqueuepl 224 943 0 933 12 9 3 5 0 8 2 pipepl 344 681 0 652 18 15 3 9 0 8 0 fdescpl 528 3031 0 2999 3 0 3 3 0 8 0 filepl 160 20498 0 20203 43 21 22 22 0 8 8 lockfpl 104 1247 0 1212 2 1 1 2 0 8 0 lockfspl 48 439 0 436 1 0 1 1 0 8 0 sessionpl 144 52 0 42 1 0 1 1 0 8 0 pgrppl 48 257 0 239 1 0 1 1 0 8 0 ucredpl 104 3585 0 3572 1 0 1 1 0 8 0 zombiepl 144 3008 0 3007 2 1 1 1 0 8 0 processpl 1232 3076 0 3007 7 1 6 6 0 8 0 procpl 664 7403 0 7328 8 0 8 8 0 8 0 sosppl 176 21 0 21 4 4 0 1 0 8 0 sockpl 752 5111 0 5038 46 33 13 25 0 8 5 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 74 0 0 6 0 6 6 0 8 0 mtagpl 96 19 0 0 1 0 1 1 0 8 0 mbufpl 256 311 0 0 17 0 17 17 0 8 0 bufpl 280 37292 0 31156 439 0 439 439 0 8 0 anonpl 32 16713 0 0 135 0 135 135 0 246 0 amapchunkpl 152 88520 0 88008 56 21 35 35 0 158 9 amappl16 200 11878 0 11849 85 69 16 40 0 8 8 amappl15 192 8 0 7 1 0 1 1 0 8 0 amappl14 184 6 0 6 1 1 0 1 0 8 0 amappl13 176 619 0 618 1 0 1 1 0 8 0 amappl12 168 3522 0 3477 3 0 3 3 0 8 0 amappl11 160 7 0 7 2 2 0 1 0 8 0 amappl10 152 54 0 39 1 0 1 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 89 0 86 1 0 1 1 0 8 0 amappl7 128 145 0 144 1 0 1 1 0 8 0 amappl6 120 487 0 471 1 0 1 1 0 8 0 amappl5 112 121 0 108 1 0 1 1 0 8 0 amappl4 104 571 0 539 1 0 1 1 0 8 0 amappl3 96 15978 0 15894 4 1 3 3 0 8 0 amappl2 88 3188 0 3099 3 0 3 3 0 8 0 amappl1 80 24607 0 23853 17 1 16 16 0 8 0 amappl 88 24720 0 24556 5 0 5 5 0 92 0 uvmvnodes 80 215 0 0 5 0 5 5 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 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 7 0 7 2 2 0 1 0 8 0 dma128 128 258 0 258 4 4 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 97 0 10 2 0 2 2 0 8 0 uaddrrnd 24 3031 0 2999 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3031 0 2999 1 0 1 1 0 8 0 vmmpekpl 168 25553 0 25489 4 0 4 4 0 8 0 vmmpepl 168 200274 0 198136 152 44 108 120 0 357 5 vmsppl 488 3030 0 2999 5 0 5 5 0 8 0 rwobjpl 80 55484 0 54061 47 12 35 40 0 8 0 pdppl 4096 6098 0 6014 155 67 88 89 0 8 4 pvpl 32 25316 0 0 204 0 204 204 0 265 0 pmappl 256 3044 0 3001 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 371 0 100 8 0 8 8 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: 0x7eaa0e8c9ad0, 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_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+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,a) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(a) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff83353495) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83411d29) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a34c190,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a34c190) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80002a34c270, 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_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+0xb7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0xb7 sys/dev/acpi/acpitimer.c:120 comcnputc(800,a) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(a) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff83353495) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83411d29) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a34c190,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a34c190) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000016f0000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000fffeb248) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffeb248) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a34c340) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f1282b8,81,fffffd80097fd750,ffff8000fffeb248) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805d830190,ffff8000fffeb248) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805d830190,ffff8000fffeb248) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805d830190,ffff8000fffeb248) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805d830190,ffff8000fffeb248) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeb248) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeb248,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffeb248,ffff80002a34c6b0,ffff80002a34c600) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a34c6b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a34c6b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7849bbfed510, count: -26