*cpu1: uvm_fault(0xfffffd806f5eb7a8, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x768d18d4a230, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003482b080 rbx 0 rdx 0 rcx 0xffff80003c4247f8 rax 0x2a r8 0xffff80003482afb0 r9 0x1 r10 0xd055a670f71338e5 r11 0xc774f81c04191c58 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8258e4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003482b000 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=59827 pid=78140 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=0xffff80003c424030,0xffff80002a338d40 process=0xffff80002ebc9840 user=0xffff800034826000, vmspace=0xfffffd806ea9f3e0 estcpu=36, cpticks=1, pctcpu=0.0, user=1, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *78140 59827 94867 0 7 0 syz-executor 78140 446574 94867 0 3 0x4000080 fsleep syz-executor 87837 120059 42145 60928 2 0x10 syz-executor 87837 260388 42145 60928 7 0x4000010 syz-executor 87837 260517 42145 60928 3 0x4000090 fsleep syz-executor 76753 403980 3195 60929 2 0x10 syz-executor 76753 154250 3195 60929 3 0x4000090 fsleep syz-executor 76753 163496 3195 60929 3 0x4000090 fsleep syz-executor 76753 23699 3195 60929 2 0x4000010 syz-executor 82274 442802 66643 0 2 0 syz-executor 82274 246633 66643 0 3 0x4000080 piperd syz-executor 82274 166635 66643 0 3 0x4000080 fsleep syz-executor 1933 504454 82693 0 2 0 syz-executor 1933 386408 82693 0 3 0x4000080 lockf syz-executor 38554 99293 71290 0 2 0x2 syz-executor 4689 487116 0 0 3 0x14200 acct acct 67679 248128 1 0 3 0x80 nanoslp init 3195 362211 71290 0 3 0x82 nanoslp syz-executor 68699 378130 0 0 3 0x14280 nfsidl nfsio 60250 362354 0 0 3 0x14280 nfsidl nfsio 73990 42935 0 0 3 0x14280 nfsidl nfsio 59389 160341 0 0 3 0x14280 nfsidl nfsio 40162 507204 71290 0 2 0x2 syz-executor 94867 11609 71290 0 3 0x82 nanoslp syz-executor 8486 394409 71290 0 2 0x2 syz-executor 82693 440424 71290 0 3 0x82 nanoslp syz-executor 42145 280165 71290 0 3 0x82 nanoslp syz-executor 66643 469812 71290 0 3 0x82 nanoslp syz-executor 71290 136293 26434 0 3 0x82 kqread syz-executor 26434 382286 59645 0 3 0x10008a sigsusp ksh 59645 418625 88977 0 3 0x98 kqread sshd-session 88977 350523 63129 0 3 0x92 kqread sshd-session 63129 411395 1 0 3 0x88 kqread sshd 16496 302 66496 74 3 0x1100092 bpf pflogd 66496 41930 1 0 3 0x80 sbwait pflogd 48321 158165 61804 73 3 0x1100090 kqread syslogd 61804 514170 1 0 3 0x100082 sbwait syslogd 83870 446486 1 0 3 0x100080 kqread resolvd 21278 489638 87088 77 3 0x100092 kqread dhcpleased 95466 499695 87088 77 3 0x100092 kqread dhcpleased 87088 246235 1 0 3 0x80 kqread dhcpleased 79197 252313 0 0 3 0x14200 bored smr 53817 125240 0 0 2 0x14200 zerothread 50991 256444 0 0 3 0x14200 aiodoned aiodoned 32529 291800 0 0 3 0x14200 syncer update 76863 366330 0 0 3 0x14200 cleaner cleaner 81493 201555 0 0 3 0x14200 reaper reaper 34500 140864 0 0 3 0x14200 pgdaemon pagedaemon 36619 260147 0 0 3 0x14200 bored viomb 55620 28080 0 0 3 0x40014200 acpi0 acpi0 67182 302137 0 0 3 0x40014200 idle1 57985 110179 0 0 3 0x14200 bored softnet1 3316 57201 0 0 3 0x14200 bored softnet0 88159 384020 0 0 3 0x14200 bored systqmp 50490 347060 0 0 3 0x14200 bored systq 48591 87361 0 0 3 0x14200 tmoslp softclockmp 12497 300766 0 0 3 0x40014200 tmoslp softclock 31338 414489 0 0 3 0x40014200 idle0 1 447065 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8078b9a110) #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 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #4 uvm_fault_lower_lookup+0x3d6 sys/uvm/uvm_fault.c:-1 #5 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1348 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #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 78140 (syz-executor) thread 0xffff80003c4247f8 (59827) Process 87837 (syz-executor) thread 0xffff80003c425788 (260388) Process 76753 (syz-executor) thread 0xffff80003c424d28 (23699) Process 38554 (syz-executor) thread 0xffff80002a338568 (99293) Process 40162 (syz-executor) thread 0xffff80003c425258 (507204) Process 8486 (syz-executor) thread 0xffff80002a338fc8 (394409) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11113 12156K 12366K 166960K 14047 0 pcb 17 20K 25K 166960K 638 0 rtable 269 14K 15K 166960K 1295 0 pf 36 18K 81K 166960K 384 0 ifaddr 39 8K 9K 166960K 269 0 ifgroup 55 2K 2K 166960K 450 0 sysctl 4 1K 9K 166960K 65 0 counters 70 37K 38K 166960K 474 0 ioctlops 0 0K 4K 166960K 2238 0 iov 0 0K 24K 166960K 286 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1391 88K 88K 166960K 3746 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 10K 166960K 49 0 VM map 2 1K 1K 166960K 2 0 sem 24 137K 137K 166960K 51 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 236K 166960K 3438 0 sigio 0 0K 0K 166960K 64 0 proc 63 99K 180K 166960K 1359 0 subproc 72 4K 4K 166960K 262 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 609 0 in_multi 80 5K 7K 166960K 445 0 ether_multi 1 0K 0K 166960K 38 0 mrt 2 0K 0K 166960K 35 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 1612 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 163K 186K 166960K 32730 0 UVM aobj 103 150K 150K 166960K 105 0 pinsyscall 42 84K 104K 166960K 5087 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 3 0K 1K 166960K 248 0 NDP 12 0K 2K 166960K 204 0 temp 84 8680K 9196K 166960K 155157 0 kqueue 13 20K 30K 166960K 544 0 SYN cache 2 0K 16K 166960K 4 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 120 550 0 546 5 4 1 3 0 8 0 rtentry 176 422 0 320 6 0 6 6 0 8 0 unpcb 144 2402 0 2385 19 18 1 6 0 8 0 syncache 336 11 0 11 6 6 0 1 0 8 0 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 1033 0 1026 15 14 1 7 0 8 0 arp 136 79 0 50 2 0 2 2 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 2 0 2 1 1 0 1 0 8 0 inpcb 328 3979 0 3932 47 37 10 13 0 8 5 nd6 152 93 0 72 2 0 2 2 0 8 0 pkpcb 40 22 0 22 4 4 0 1 0 8 0 kcovpl 48 29 0 21 1 0 1 1 0 8 0 mppekey 1024 6 0 6 5 5 0 1 0 8 0 ppxss 1192 152 0 152 3 2 1 1 0 8 1 pppxif 1504 16 0 16 6 5 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 31 0 23 1 0 1 1 0 482 0 pffrnode 88 30 0 22 1 0 1 1 0 8 0 pffrent 40 75 0 67 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 5 0 5 3 3 0 1 0 8 0 pfanchor 1288 4 0 4 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 230 0 116 1 0 1 1 0 8 0 pfstkey 128 232 0 118 5 0 5 5 0 8 0 pfstate 448 231 0 117 16 0 16 16 0 8 0 pfrule 1344 30 0 25 2 1 1 2 0 8 0 rttmr 136 8 0 8 3 3 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1875 0 1441 39 8 31 31 0 8 1 art_table 40 1878 0 1441 5 0 5 5 0 8 0 art_node 32 418 0 327 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 46 0 24 1 0 1 1 0 8 0 shmpl 112 28 0 1 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 7538 0 5990 97 0 97 97 0 8 0 ffsino 296 7538 0 5990 120 0 120 120 0 8 0 nchpl 144 12242 0 11629 65 40 25 64 0 8 0 rtmask 32 27 0 27 4 4 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 42503 0 42503 4 3 1 2 0 8 1 percpumem 16 252 0 202 1 0 1 1 0 8 0 vcpupl 3968 73 0 0 10 0 10 10 0 8 0 vmpool 840 74 0 1 9 0 9 9 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 298 0 268 7 4 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 15 0 15 6 5 1 1 0 8 1 scxspl 216 76753 0 76753 14 13 1 8 1 8 1 plimitpl 152 985 0 969 1 0 1 1 0 8 0 sigapl 424 3717 0 3664 9 2 7 8 0 8 0 knotepl 120 551 0 0 17 0 17 17 0 8 0 kqueuepl 224 1453 0 1444 17 16 1 5 0 8 0 pipepl 344 606 0 578 12 9 3 9 0 8 0 fdescpl 528 3674 0 3642 3 0 3 3 0 8 0 filepl 160 25166 0 24912 35 20 15 17 0 8 3 lockfpl 104 1160 0 1156 2 1 1 2 0 8 0 lockfspl 48 500 0 497 1 0 1 1 0 8 0 sessionpl 144 48 0 40 1 0 1 1 0 8 0 pgrppl 48 298 0 282 1 0 1 1 0 8 0 ucredpl 104 4333 0 4318 1 0 1 1 0 8 0 zombiepl 144 4305 0 4305 2 1 1 1 0 8 1 processpl 1232 3717 0 3664 7 2 5 6 0 8 0 procpl 664 8941 0 8879 8 2 6 8 0 8 0 sosppl 176 38 0 38 3 3 0 1 0 8 0 sockpl 752 7094 0 7026 69 56 13 20 0 8 5 mcl64k 65536 20 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 43 0 0 5 0 5 5 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 1842 0 0 114 0 114 114 0 8 0 bufpl 280 32931 0 26795 439 0 439 439 0 8 0 anonpl 32 13310 0 0 108 1 107 107 0 246 0 amapchunkpl 152 111631 0 111124 53 24 29 34 0 158 3 amappl16 200 12948 0 12848 111 96 15 28 0 8 3 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 8 0 7 1 0 1 1 0 8 0 amappl13 176 668 0 666 1 0 1 1 0 8 0 amappl12 168 4181 0 4143 3 0 3 3 0 8 0 amappl11 160 56 0 55 1 0 1 1 0 8 0 amappl10 152 50 0 36 1 0 1 1 0 8 0 amappl9 144 243 0 243 1 1 0 1 0 8 0 amappl8 136 29 0 26 1 0 1 1 0 8 0 amappl7 128 164 0 162 1 0 1 1 0 8 0 amappl6 120 526 0 512 1 0 1 1 0 8 0 amappl5 112 83 0 72 1 0 1 1 0 8 0 amappl4 104 558 0 529 1 0 1 1 0 8 0 amappl3 96 22656 0 22562 5 1 4 4 0 8 0 amappl2 88 741 0 681 2 0 2 2 0 8 0 amappl1 80 24775 0 24221 15 1 14 14 0 8 0 amappl 88 31123 0 30967 5 0 5 5 0 92 0 uvmvnodes 80 207 0 0 5 0 5 5 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 259 0 259 5 4 1 1 0 8 1 dma64 64 72 0 72 3 3 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 72 104 0 2 2 0 2 2 0 8 0 uaddrrnd 24 3673 0 3642 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3673 0 3642 1 0 1 1 0 8 0 vmmpekpl 168 28609 0 28550 4 0 4 4 0 8 0 vmmpepl 168 236577 0 234703 137 38 99 110 0 357 0 vmsppl 488 3673 0 3642 5 0 5 5 0 8 1 rwobjpl 80 61459 0 60202 45 12 33 35 0 8 0 pdppl 4096 7501 0 7359 194 50 144 146 0 8 2 pvpl 32 22352 0 0 180 0 180 180 0 265 0 pmappl 256 3746 0 3643 7 0 7 7 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 535 0 92 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: 0x768d18d4a230, 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+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,65) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83350916) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83411f7f) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a32ead0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a32ead0) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80002a32ebb0, 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+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,65) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83350916) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83411f7f) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a32ead0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a32ead0) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001589000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff80003c425788) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c425788) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a32ec80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8073f73000,81,fffffd80097fd618,ffff80003c425788) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806da84a18,ffff80003c425788) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806da84a18,ffff80003c425788) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806da84a18,ffff80003c425788) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806da84a18,ffff80003c425788) at closef+0x192 sys/kern/kern_descrip.c:1264 syscall(ffff80002a32eee0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a32eee0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcf6bcb3b070, count: -23