*cpu1: uvm_fault(0xfffffd80698bbb60, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f6040081830, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800030fdeca0 rbx 0 rdx 0 rcx 0xffff8000ffff07d0 rax 0x2a r8 0xffff800030fdebd0 r9 0 r10 0x655b8cf07776286e r11 0x4a0a8d06a19698dd r12 0 r13 0 r14 0 r15 0 rip 0xffffffff813e24c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800030fdec20 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=103295 pid=66286 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=0xffff8000ffff19c0,0xffff8000ffff0030 process=0xffff8000fffea128 user=0xffff800030fd9000, vmspace=0xfffffd80699f05b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *66286 103295 48588 0 7 0 syz-executor 97565 514809 64221 0 2 0 syz-executor 97565 131981 64221 0 3 0x4000080 fsleep syz-executor 12162 446425 88044 0 2 0 syz-executor 12162 366666 88044 0 2 0x4000000 syz-executor 12162 252075 88044 0 2 0x4000000 syz-executor 61233 414610 26110 0 2 0 syz-executor 61233 263470 26110 0 2 0x4000000 syz-executor 61233 522046 26110 0 3 0x4000080 kqsel syz-executor 61233 107606 26110 0 3 0x4000080 fsleep syz-executor 86855 260403 79492 0 2 0 syz-executor 86855 253516 79492 0 3 0x4000080 fsleep syz-executor 86855 112950 79492 0 3 0x4000080 fsleep syz-executor 69110 166972 4741 0 2 0 syz-executor 69110 466546 4741 0 3 0x4000080 lockf syz-executor 69110 395983 4741 0 3 0x4000080 fsleep syz-executor 70102 283118 0 0 3 0x14200 bored sosplice 85409 237313 36681 0 3 0x82 nanoslp syz-executor 88044 441585 36681 0 3 0x82 nanoslp syz-executor 4741 204875 36681 0 2 0x2 syz-executor 26110 17292 36681 0 2 0x2 syz-executor 48588 35254 36681 0 3 0x82 nanoslp syz-executor 64221 148492 36681 0 3 0x82 nanoslp syz-executor 59224 383541 36681 0 2 0x2 syz-executor 79492 506163 36681 0 3 0x82 nanoslp syz-executor 36681 129635 90600 0 3 0x82 kqread syz-executor 90600 336124 57706 0 3 0x10008a sigsusp ksh 57706 451747 89824 0 3 0x98 kqread sshd-session 89824 458673 77938 0 3 0x92 kqread sshd-session 49328 116395 1 0 3 0x100083 ttyin getty 77938 55069 1 0 3 0x88 kqread sshd 66312 138960 5386 74 3 0x1100092 bpf pflogd 5386 267191 1 0 3 0x80 sbwait pflogd 23602 368267 13274 73 3 0x1100090 kqread syslogd 13274 399728 1 0 3 0x100082 sbwait syslogd 7277 327143 1 0 3 0x100080 kqread resolvd 86918 447973 28659 77 3 0x100092 kqread dhcpleased 8641 119165 28659 77 3 0x100092 kqread dhcpleased 28659 501926 1 0 3 0x80 kqread dhcpleased 37207 148813 0 0 3 0x14200 bored smr 2763 341783 0 0 2 0x14200 zerothread 86715 251946 0 0 3 0x14200 aiodoned aiodoned 46670 449501 0 0 3 0x14200 syncer update 35687 287431 0 0 3 0x14200 cleaner cleaner 86704 193390 0 0 3 0x14200 reaper reaper 63952 342183 0 0 3 0x14200 pgdaemon pagedaemon 17728 67403 0 0 3 0x14200 bored viomb 97918 94436 0 0 3 0x40014200 acpi0 acpi0 80461 233986 0 0 3 0x40014200 idle1 48458 96500 0 0 3 0x14200 bored softnet3 58621 164518 0 0 3 0x14200 bored softnet2 16224 241468 0 0 3 0x14200 bored softnet1 70888 231142 0 0 3 0x14200 bored softnet0 82095 104813 0 0 3 0x14200 bored systqmp 12095 387291 0 0 3 0x14200 bored systq 26947 269555 0 0 3 0x14200 tmoslp softclockmp 49554 436558 0 0 3 0x40014200 tmoslp softclock 87646 394336 0 0 3 0x40014200 idle0 1 11279 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd80698ba910) #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_extract+0xac sys/arch/amd64/amd64/pmap.c:1572 #4 uvm_fault_upper_lookup+0x20b sys/uvm/uvm_fault.c:1003 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:682 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 66286 (syz-executor) thread 0xffff8000ffff07d0 (103295) exclusive rwlock amaplk r = 0 (0xfffffd806ce0f650) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 uvm_fault_check+0x5a9 sys/uvm/uvm_fault.c:862 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd80699f06b8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1924 #3 uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd80698ba910) #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_extract+0xac sys/arch/amd64/amd64/pmap.c:1572 #4 uvm_fault_upper_lookup+0x20b sys/uvm/uvm_fault.c:1003 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:682 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 11207K 11470K 166960K 11696 0 pcb 17 12K 12K 166960K 34 0 rtable 214 6K 6K 166960K 363 0 pf 33 17K 18K 166960K 55 0 ifaddr 39 6K 7K 166960K 51 0 ifgroup 51 2K 2K 166960K 66 0 sysctl 4 1K 9K 166960K 9 0 counters 64 36K 37K 166960K 78 0 ioctlops 0 0K 4K 166960K 1499 0 iov 0 0K 16K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1345 85K 85K 166960K 1500 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 267 0 proc 72 91K 128K 166960K 553 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 11 0 in_multi 88 6K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 387 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 251 172K 180K 166960K 4100 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 43 86K 106K 166960K 1390 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 9 0 NDP 11 0K 2K 166960K 32 0 temp 38 8662K 8730K 166960K 14978 0 kqueue 14 22K 26K 166960K 43 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 46 0 43 1 0 1 1 0 8 0 rtentry 176 111 0 12 5 0 5 5 0 8 0 unpcb 144 109 0 90 2 0 2 2 0 8 1 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 808 41 0 34 1 0 1 1 0 8 0 arp 128 18 0 2 1 0 1 1 0 8 0 inpcb 384 156 0 143 2 0 2 2 0 8 0 nd6 144 24 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 5 0 5 1 0 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 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 pfstitem 24 27 0 0 1 0 1 1 0 8 0 pfstkey 128 28 0 1 1 0 1 1 0 8 0 pfstate 384 28 0 1 3 0 3 3 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 44 29 0 29 29 0 8 1 art_table 32 453 0 44 4 0 4 4 0 8 0 art_node 16 110 0 20 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 5 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1830 0 324 95 0 95 95 0 8 0 ffsino 288 1830 0 324 109 0 109 109 0 8 0 nchpl 144 2208 0 519 63 0 63 63 0 8 0 uvmvnodes 80 1994 0 0 41 0 41 41 0 8 0 vnodes 216 1994 0 0 111 0 111 111 0 8 0 namei 1024 6866 0 6866 2 0 2 2 0 8 2 percpumem 16 54 0 7 1 0 1 1 0 8 0 kstatmem 264 34 0 10 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6976 0 6976 3 2 1 2 1 8 1 plimitpl 152 42 0 24 1 0 1 1 0 8 0 sigapl 424 579 0 528 7 0 7 7 0 8 1 knotepl 120 537 0 0 17 0 17 17 0 8 0 kqueuepl 224 64 0 51 1 0 1 1 0 8 0 pipepl 336 120 0 93 3 0 3 3 0 8 0 fdescpl 520 560 0 528 3 0 3 3 0 8 0 filepl 160 2297 0 2049 13 0 13 13 0 8 2 lockfpl 104 40 0 36 1 0 1 1 0 8 0 lockfspl 48 20 0 17 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 206 0 193 1 0 1 1 0 8 0 zombiepl 144 530 0 528 1 0 1 1 0 8 0 processpl 1208 579 0 528 5 0 5 5 0 8 0 procpl 656 820 0 759 6 0 6 6 0 8 0 srpgc 96 2 0 2 1 0 1 1 0 8 1 sockpl 728 318 0 283 5 0 5 5 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 133 0 0 17 0 17 17 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 73 0 0 2 0 2 2 0 8 0 mbufpl 256 207 0 0 13 0 13 13 0 8 0 bufpl 280 2542 0 124 173 0 173 173 0 8 0 anonpl 32 3935 0 0 33 1 32 32 0 246 0 amapchunkpl 152 11487 0 10955 28 0 28 28 0 158 6 amappl16 200 315 0 272 3 0 3 3 0 8 0 amappl15 192 6 0 5 2 1 1 1 0 8 0 amappl14 184 112 0 100 1 0 1 1 0 8 0 amappl13 176 1 0 1 1 1 0 1 0 8 0 amappl12 168 1218 0 1186 3 1 2 2 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 1 0 1 1 1 0 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 17 0 15 1 0 1 1 0 8 0 amappl7 128 106 0 93 1 0 1 1 0 8 0 amappl6 120 190 0 187 1 0 1 1 0 8 0 amappl5 112 117 0 107 1 0 1 1 0 8 0 amappl4 104 320 0 301 1 0 1 1 0 8 0 amappl3 96 2155 0 2035 5 1 4 4 0 8 1 amappl2 88 651 0 590 2 0 2 2 0 8 0 amappl1 80 9011 0 8409 16 1 15 16 0 8 1 amappl 88 3368 0 3191 5 0 5 5 0 92 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 128 253 0 253 1 1 0 1 0 8 0 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 560 0 528 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 560 0 528 1 0 1 1 0 8 0 vmmpekpl 168 6331 0 6291 3 0 3 3 0 8 0 vmmpepl 168 40251 0 38196 97 0 97 97 0 357 1 vmsppl 480 559 0 528 5 0 5 5 0 8 0 rwobjpl 72 14372 0 11421 56 0 56 56 0 8 0 pdppl 4096 1128 0 1056 108 34 74 88 0 8 2 pvpl 32 11371 0 0 93 1 92 92 0 265 0 pmappl 256 559 0 528 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 393 0 36 11 0 11 11 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: 0x7f6040081830, 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:654 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+0x61 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x524 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x524 sys/ddb/db_output.c:153 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff834019ac) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a5c8b) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80003c41a650,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80003c41a650) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001487000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 end trace frame: 0xffff80003c41a780, 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:654 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+0x61 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x524 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x524 sys/ddb/db_output.c:153 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff834019ac) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a5c8b) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80003c41a650,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80003c41a650) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001487000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(31e5f,1,2000,ffff8000fffe7c58) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,1,2000,ffff8000fffe7c58) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c41a800) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8066398970,1,fffffd807f7d33a8,ffff8000fffe7c58) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806806ceb0,ffff8000fffe7c58) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806806ceb0,ffff8000fffe7c58) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806806ceb0,ffff8000fffe7c58) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806806ceb0,ffff8000fffe7c58) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff8000fffe7c58) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff8000fffe7c58,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000fffe7c58,ffff80003c41ab70,ffff80003c41aac0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c41ab70) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c41ab70) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dac5edb6bb0, count: -25