*cpu1: uvm_fault(0xfffffd806b9b2018, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x3b13f54f530, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003843d6a0 rbx 0 rdx 0 rcx 0xffff80002a2b74e0 rax 0x2a r8 0xffff80003843d5d0 r9 0x1 r10 0x749f11b86f6ded6b r11 0x36f06705825c2017 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff813db4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003843d620 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=110449 pid=65690 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2b6d18,0xffff80002a2b7cb8 process=0xffff800037c29d00 user=0xffff800038438000, vmspace=0xfffffd806b9b29a0 estcpu=6, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37156 29408 32494 0 2 0 syz-executor 37156 238515 32494 0 2 0x4000000 syz-executor 65690 169975 77042 0 2 0 syz-executor *65690 110449 77042 0 7 0x4000000 syz-executor 9463 33633 65386 0 2 0x2 sh 89011 269039 77349 0 2 0 syz-executor 89011 7842 77349 0 3 0x4000080 fsleep syz-executor 89011 451829 77349 0 3 0x4000080 fsleep syz-executor 51132 138319 91202 0 2 0 syz-executor 51132 351152 91202 0 3 0x4000080 fsleep syz-executor 51132 152905 91202 0 3 0x4000080 fsleep syz-executor 51132 297476 91202 0 3 0x4000080 fsleep syz-executor 2603 490890 57519 0 3 0x80 nanoslp syz-executor 2603 373946 57519 0 3 0x4000080 kqread syz-executor 2603 256042 57519 0 3 0x4000080 fsleep syz-executor 91202 103875 58912 0 3 0x82 nanoslp syz-executor 30951 161093 58912 0 3 0x82 nanoslp syz-executor 49852 402114 58912 0 3 0x82 nanoslp syz-executor 57519 82261 58912 0 3 0x82 nanoslp syz-executor 77042 276241 58912 0 3 0x82 nanoslp syz-executor 77349 504172 58912 0 2 0x2 syz-executor 65386 314651 58912 0 3 0x82 wait syz-executor 32494 400517 58912 0 3 0x82 nanoslp syz-executor 58912 133347 57285 0 3 0x82 kqread syz-executor 57285 454042 39420 0 3 0x10008a sigsusp ksh 39420 505019 10161 0 3 0x98 kqread sshd-session 10161 510969 35020 0 3 0x92 kqread sshd-session 75260 337168 1 0 3 0x100083 ttyin getty 35020 127062 1 0 3 0x88 kqread sshd 20 293687 40574 74 3 0x1100092 bpf pflogd 40574 24470 1 0 3 0x80 sbwait pflogd 42550 199491 81549 73 3 0x1100090 kqread syslogd 81549 227875 1 0 3 0x100082 sbwait syslogd 33148 452187 1 0 3 0x100080 kqread resolvd 96111 199495 51084 77 3 0x100092 kqread dhcpleased 16837 308084 51084 77 3 0x100092 kqread dhcpleased 51084 416272 1 0 3 0x80 kqread dhcpleased 5655 56056 0 0 3 0x14200 bored smr 40758 197644 0 0 2 0x14200 zerothread 49734 97280 0 0 3 0x14200 aiodoned aiodoned 73908 204877 0 0 3 0x14200 syncer update 66462 169266 0 0 3 0x14200 cleaner cleaner 47151 82067 0 0 3 0x14200 reaper reaper 73914 134519 0 0 3 0x14200 pgdaemon pagedaemon 24019 99794 0 0 3 0x14200 bored viomb 17322 115998 0 0 3 0x40014200 acpi0 acpi0 70688 199726 0 0 3 0x40014200 idle1 91646 216410 0 0 3 0x14200 bored softnet7 67458 208876 0 0 3 0x14200 bored softnet6 35141 172936 0 0 3 0x14200 bored softnet5 83007 131266 0 0 3 0x14200 bored softnet4 57905 446683 0 0 3 0x14200 bored softnet3 36058 41079 0 0 3 0x14200 bored softnet2 61482 481032 0 0 3 0x14200 bored softnet1 92913 448865 0 0 3 0x14200 bored softnet0 93369 195557 0 0 3 0x14200 bored systqmp 64023 94521 0 0 3 0x14200 bored systq 12002 439488 0 0 3 0x14200 tmoslp softclockmp 37582 504403 0 0 3 0x40014200 tmoslp softclock 53651 288279 0 0 3 0x40014200 idle0 1 182167 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 (0xfffffd806b7a1210) #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_extract+0xb1 sys/arch/amd64/amd64/pmap.c:1572 #4 uvm_fault_lower_lookup+0x268 sys/uvm/uvm_fault.c:1271 #5 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1370 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #9 recall_trap+0x8 Process 65690 (syz-executor) thread 0xffff80002a2b74e0 (110449) exclusive rwlock uobjlk r = 0 (0xfffffd806caa7520) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1236 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1370 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806b9b2aa0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #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:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b7a1210) #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_extract+0xb1 sys/arch/amd64/amd64/pmap.c:1572 #4 uvm_fault_lower_lookup+0x268 sys/uvm/uvm_fault.c:1271 #5 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1370 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #9 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10239 11070K 11070K 166960K 11320 0 pcb 17 12K 12K 166960K 17 0 rtable 193 5K 5K 166960K 243 0 pf 37 18K 18K 166960K 48 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 60 2K 2K 166960K 60 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 1482 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1344 85K 85K 166960K 1365 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 139 0 proc 69 115K 164K 166960K 522 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 1 0 in_multi 89 6K 6K 166960K 89 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 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 358 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 245 168K 176K 166960K 3027 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 43 86K 104K 166960K 1210 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 27 1K 1K 166960K 27 0 temp 35 8638K 8702K 166960K 3867 0 kqueue 14 22K 24K 166960K 25 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 32 0 29 1 0 1 1 0 8 0 rtentry 176 89 0 1 4 0 4 4 0 8 0 unpcb 144 39 0 18 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 8 0 4 1 0 1 1 0 8 0 arp 128 10 0 0 1 0 1 1 0 8 0 inpcb 328 66 0 58 1 0 1 1 0 8 0 nd6 144 14 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 0 1 0 1 1 0 8 0 kcovpl 48 8 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 13 0 0 1 0 1 1 0 8 0 pfstkey 128 13 0 0 1 0 1 1 0 8 0 pfstate 384 13 0 0 2 0 2 2 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 397 0 0 25 0 25 25 0 8 0 art_table 40 398 0 0 5 0 5 5 0 8 0 art_node 32 89 0 10 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1567 0 53 95 0 95 95 0 8 0 ffsino 296 1567 0 53 117 0 117 117 0 8 0 nchpl 144 1759 0 65 63 0 63 63 0 8 0 uvmvnodes 80 1658 0 0 34 0 34 34 0 8 0 vnodes 216 1658 0 0 93 0 93 93 0 8 0 namei 1024 5453 0 5453 2 0 2 2 0 8 2 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 28 0 0 2 0 2 2 0 8 0 scxspl 216 6394 0 6394 3 1 2 2 1 8 2 plimitpl 152 62 0 42 1 0 1 1 0 8 0 sigapl 424 441 0 387 7 0 7 7 0 8 0 knotepl 120 58 0 0 2 0 2 2 0 8 0 kqueuepl 224 19 0 9 1 0 1 1 0 8 0 pipepl 344 105 0 76 3 0 3 3 0 8 0 fdescpl 528 419 0 387 3 0 3 3 0 8 0 filepl 160 1538 0 1252 12 0 12 12 0 8 0 lockfpl 104 8 0 6 1 0 1 1 0 8 0 lockfspl 48 5 0 3 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 172 0 158 1 0 1 1 0 8 0 zombiepl 144 389 0 387 1 0 1 1 0 8 0 processpl 1232 441 0 387 5 0 5 5 0 8 0 procpl 664 467 0 404 6 0 6 6 0 8 0 sockpl 752 139 0 105 4 0 4 4 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 119 0 0 8 0 8 8 0 8 0 bufpl 280 2876 0 122 197 0 197 197 0 8 0 anonpl 32 3961 0 0 32 0 32 32 0 246 0 amapchunkpl 152 8529 0 8019 24 3 21 21 0 158 1 amappl16 200 1952 0 1934 5 0 5 5 0 8 4 amappl15 192 8 0 8 1 0 1 1 0 8 1 amappl14 184 108 0 96 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 0 1 1 0 8 1 amappl12 168 1055 0 1024 4 1 3 3 0 8 1 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 0 1 1 0 8 1 amappl8 136 29 0 27 1 0 1 1 0 8 0 amappl7 128 104 0 92 1 0 1 1 0 8 0 amappl6 120 174 0 170 1 0 1 1 0 8 0 amappl5 112 119 0 110 1 0 1 1 0 8 0 amappl4 104 295 0 274 1 0 1 1 0 8 0 amappl3 96 1298 0 1183 3 0 3 3 0 8 0 amappl2 88 631 0 571 2 0 2 2 0 8 0 amappl1 80 8063 0 7456 15 0 15 15 0 8 1 amappl 88 2368 0 2197 4 0 4 4 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 419 0 387 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 419 0 387 1 0 1 1 0 8 0 vmmpekpl 168 5068 0 5033 2 0 2 2 0 8 0 vmmpepl 168 33512 0 31539 89 0 89 89 0 357 1 vmsppl 488 418 0 387 5 0 5 5 0 8 0 rwobjpl 80 13978 0 11388 56 0 56 56 0 8 0 pdppl 4096 846 0 774 98 12 86 86 0 8 14 pvpl 32 9945 0 0 82 1 81 82 0 265 0 pmappl 256 418 0 387 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 260 0 14 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: 0x3b13f54f530, count: -1 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:662 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(65) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83313d4b) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d39fb) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff800031c06e00,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff800031c06e00) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:489 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147e000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 end trace frame: 0xffff800031c06f30, 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:662 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(65) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83313d4b) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d39fb) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff800031c06e00,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff800031c06e00) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:489 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000147e000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff800037c262c0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800037c262c0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800031c06fb0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b59ca20,81,fffffd80097fb4e0,ffff800037c262c0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806680fd70,ffff800037c262c0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806680fd70,ffff800037c262c0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806680fd70,ffff800037c262c0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806680fd70,ffff800037c262c0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800037c262c0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800037c262c0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800037c262c0,ffff800031c07320,ffff800031c07270) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800031c07320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031c07320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a323bfc50a0, count: -25