*cpu1: uvm_fault(0xfffffd805b5f65e0, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7ce0c2904d10, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c4ebfb0 rbx 0 rdx 0 rcx 0xffff8000ffff27d8 rax 0x2a r8 0xffff80003c4ebee0 r9 0 r10 0x8233231c276b6218 r11 0x5839ff5d8863efd r12 0 r13 0 r14 0 r15 0 rip 0xffffffff829034c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c4ebf30 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=284357 pid=15948 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff3a00,0xffffffff839454e8 process=0xffff80003c4c7518 user=0xffff80003c4e6000, vmspace=0xfffffd806a71c3f0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *15948 284357 5462 0 7 0 syz-executor 55551 172473 74257 0 2 0 syz-executor 73098 184861 12407 0 3 0x2 biowait syz-executor 933 96504 82159 0 2 0x2 ifconfig 82159 48620 98425 0 3 0x10008a sigsusp sh 66804 116879 35322 0 2 0 syz-executor 66804 283258 35322 0 7 0x4000000 syz-executor 66804 350807 35322 0 3 0x4000080 fsleep syz-executor 66804 44575 35322 0 3 0x4000080 fsleep syz-executor 28545 164574 61767 0 3 0x80 nanoslp syz-executor 28545 99669 61767 0 3 0x4000080 pipewr syz-executor 28545 84913 61767 0 3 0x4000080 pipewr syz-executor 98425 26339 12407 0 3 0x82 wait syz-executor 35322 148072 12407 0 3 0x82 nanoslp syz-executor 58679 318469 12407 0 3 0x82 piperd syz-executor 61767 191250 12407 0 3 0x82 nanoslp syz-executor 5462 114333 12407 0 3 0x82 nanoslp syz-executor 74257 4874 12407 0 3 0x82 nanoslp syz-executor 90335 514202 0 0 3 0x14200 acct acct 42960 110799 0 0 3 0x14200 bored sosplice 12407 36478 98333 0 3 0x82 nanoslp syz-executor 98333 72466 39884 0 3 0x10008a sigsusp ksh 39884 88019 54668 0 3 0x98 kqread sshd-session 54668 280803 1051 0 3 0x92 kqread sshd-session 93082 362558 1 0 3 0x100083 ttyin getty 1051 279241 1 0 3 0x88 kqread sshd 79981 481254 34838 74 3 0x1100092 bpf pflogd 34838 509367 1 0 3 0x80 sbwait pflogd 51453 420805 82062 73 3 0x1100090 kqread syslogd 82062 249626 1 0 3 0x100082 sbwait syslogd 45407 472580 1 0 3 0x100080 kqread resolvd 73902 128819 0 0 3 0x14200 bored smr 52575 111271 0 0 2 0x14200 zerothread 5188 506465 0 0 3 0x14200 aiodoned aiodoned 16879 419573 0 0 3 0x14200 syncer update 50135 513835 0 0 3 0x14200 cleaner cleaner 41252 70569 0 0 3 0x14200 reaper reaper 21952 358988 0 0 3 0x14200 pgdaemon pagedaemon 86000 404363 0 0 3 0x14200 bored viomb 89698 493464 0 0 3 0x40014200 acpi0 acpi0 1489 150950 0 0 3 0x40014200 idle1 92156 148860 0 0 3 0x14200 bored softnet7 31507 278647 0 0 3 0x14200 bored softnet6 9256 61445 0 0 3 0x14200 bored softnet5 14611 5567 0 0 3 0x14200 bored softnet4 23650 121733 0 0 3 0x14200 bored softnet3 89061 451061 0 0 3 0x14200 bored softnet2 67645 266891 0 0 3 0x14200 bored softnet1 68934 63500 0 0 3 0x14200 bored softnet0 51036 288605 0 0 3 0x14200 bored systqmp 13575 343023 0 0 3 0x14200 bored systq 92081 243965 0 0 3 0x14200 tmoslp softclockmp 90722 5833 0 0 3 0x40014200 tmoslp softclock 56029 414 0 0 3 0x40014200 idle0 1 172213 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83944438) #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 uvm_fault_upper_lookup+0x24d sys/uvm/uvm_fault.c:1004 #4 uvm_fault+0x159 sys/uvm/uvm_fault.c:682 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 Process 15948 (syz-executor) thread 0xffff8000ffff27d8 (284357) Process 55551 (syz-executor) thread 0xffff8000ffff3a00 (172473) Process 73098 (syz-executor) thread 0xffff8000ffff2540 (184861) Process 66804 (syz-executor) thread 0xffff80002a329268 (283258) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10271 11151K 15230K 166960K 17955 0 pcb 17 18K 20K 166960K 1666 0 rtable 215 15K 15K 166960K 1814 0 pf 34 17K 67486K 166960K 812 0 ifaddr 42 11K 13K 166960K 499 0 ifgroup 55 2K 3K 166960K 906 0 sysctl 4 1K 9K 166960K 101 0 counters 68 36K 38K 166960K 1158 0 ioctlops 0 0K 8K 166960K 2912 0 iov 0 0K 28K 166960K 412 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1556 98K 98K 166960K 7574 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 13K 166960K 97 0 VM map 2 1K 1K 166960K 2 0 sem 23 80K 160K 166960K 302 0 dirhash 12 2K 3K 166960K 153 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 50K 240K 166960K 7263 0 sigio 0 0K 0K 166960K 260 0 proc 75 99K 163K 166960K 2002 0 subproc 54 3K 5K 166960K 418 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 848 0 in_multi 76 5K 7K 166960K 677 0 ether_multi 1 0K 0K 166960K 87 0 mrt 1 0K 0K 166960K 44 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 283 1261K 1261K 166960K 283 0 exec 0 0K 1K 166960K 2148 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 12 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 182 127K 186K 166960K 64694 0 UVM aobj 221 14K 14K 166960K 236 0 pinsyscall 34 68K 103K 166960K 9004 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 528 0 NDP 19 1K 2K 166960K 378 0 temp 86 8651K 8910K 166960K 352518 0 kqueue 7 12K 32K 166960K 1422 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 120 690 0 689 4 3 1 3 0 8 0 rtentry 176 562 0 493 5 0 5 5 0 8 0 unpcb 144 5494 0 5484 25 24 1 6 0 8 0 syncache 336 6 0 6 3 3 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 2433 0 2429 42 41 1 7 0 8 0 arp 128 85 0 76 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 8258 0 8253 69 66 3 12 0 8 2 nd6 144 90 0 79 1 0 1 1 0 8 0 pkpcb 40 72 0 72 6 6 0 1 0 8 0 kcovpl 48 46 0 40 1 0 1 1 0 8 0 mppekey 1024 13 0 13 2 2 0 1 0 8 0 ppxss 1192 439 0 439 3 3 0 1 0 8 0 pppxif 1504 71 0 71 13 13 0 1 0 8 0 pffrag 232 50 0 50 1 1 0 1 0 482 0 pffrnode 88 37 0 37 1 1 0 1 0 8 0 pffrent 40 86 0 86 1 1 0 1 0 8 0 pfosfp 40 1431 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1431 0 715 21 0 21 21 0 8 0 pfrktable 1344 2 0 2 2 2 0 1 0 8 0 pfanchor 1288 6 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 430 0 422 1 0 1 1 0 8 0 pfstkey 128 430 0 422 5 1 4 5 0 8 3 pfstate 384 430 0 422 13 3 10 13 0 8 9 pfrule 1344 46 0 40 2 1 1 2 0 8 0 rttmr 136 9 0 9 6 6 0 1 0 8 0 art_heap8 4096 7 0 4 7 4 3 4 0 8 0 art_heap4 256 2551 0 2239 48 23 25 30 0 8 5 art_table 40 2558 0 2243 5 0 5 5 0 8 0 art_node 32 554 0 495 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 11 1 0 1 1 0 8 0 semupl 112 4 0 4 3 3 0 1 0 8 0 semapl 112 289 0 268 1 0 1 1 0 8 0 shmpl 112 233 0 15 7 0 7 7 0 8 0 dirhash 1024 111 0 94 3 0 3 3 0 8 0 dino2pl 256 15217 0 13631 100 0 100 100 0 8 0 ffsino 296 15217 0 13631 122 0 122 122 0 8 0 nchpl 144 25128 0 24452 65 39 26 64 0 8 0 rtmask 32 55 0 55 11 11 0 1 0 8 0 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 93322 0 93321 7 6 1 2 0 8 0 percpumem 16 594 0 545 1 0 1 1 0 8 0 kstatmem 264 614 0 584 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 40 0 40 12 12 0 1 0 8 0 scxspl 216 153982 0 153981 20 18 2 8 1 8 1 plimitpl 152 1896 0 1881 1 0 1 1 0 8 0 sigapl 424 7440 0 7390 9 0 9 9 0 8 2 knotepl 120 810 0 0 21 0 21 21 0 8 0 kqueuepl 224 2850 0 2844 25 23 2 5 0 8 1 pipepl 344 1103 0 1075 22 16 6 9 0 8 3 fdescpl 528 7372 0 7346 3 0 3 3 0 8 0 filepl 160 54481 0 54304 43 29 14 18 0 8 4 lockfpl 104 4975 0 4972 10 9 1 2 0 8 0 lockfspl 48 1467 0 1465 1 0 1 1 0 8 0 sessionpl 144 59 0 51 1 0 1 1 0 8 0 pgrppl 48 285 0 270 1 0 1 1 0 8 0 ucredpl 104 10037 0 10026 1 0 1 1 0 8 0 zombiepl 144 9439 0 9439 1 0 1 1 0 8 1 processpl 1232 7440 0 7390 6 0 6 6 0 8 0 procpl 664 19257 0 19202 9 2 7 9 0 8 1 sosppl 168 38 0 38 8 8 0 1 0 8 0 sockpl 752 14719 0 14703 111 105 6 24 0 8 4 mcl64k 65536 19 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 150 0 0 14 0 14 14 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 142 0 0 8 0 8 8 0 8 1 mtagpl 96 72 0 0 2 0 2 2 0 8 0 mbufpl 256 1371 0 0 77 0 77 77 0 8 0 bufpl 280 62057 0 55914 440 0 440 440 0 8 0 anonpl 32 17894 0 0 143 0 143 143 0 246 0 amapchunkpl 152 227294 0 226896 95 65 30 36 0 158 10 amappl16 200 23663 0 23650 156 145 11 38 0 8 8 amappl15 192 8 0 8 3 3 0 1 0 8 0 amappl14 184 169 0 160 1 0 1 1 0 8 0 amappl13 176 13 0 13 5 5 0 1 0 8 0 amappl12 168 8519 0 8493 3 1 2 2 0 8 0 amappl11 160 57 0 48 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 251 0 251 2 2 0 1 0 8 0 amappl8 136 47 0 44 1 0 1 1 0 8 0 amappl7 128 173 0 164 1 0 1 1 0 8 0 amappl6 120 472 0 466 1 0 1 1 0 8 0 amappl5 112 256 0 246 1 0 1 1 0 8 0 amappl4 104 358 0 338 1 0 1 1 0 8 0 amappl3 96 47808 0 47729 4 0 4 4 0 8 1 amappl2 88 1112 0 1060 2 0 2 2 0 8 0 amappl1 80 38229 0 37729 15 1 14 14 0 8 1 amappl 88 62350 0 62224 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 266 0 266 9 9 0 1 0 8 0 dma64 64 11 0 11 5 4 1 1 0 8 1 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 23 0 22 1 0 1 1 0 8 0 aobjpl 72 235 0 15 4 0 4 4 0 8 0 uaddrrnd 24 7372 0 7346 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7372 0 7346 1 0 1 1 0 8 0 vmmpekpl 168 51978 0 51913 4 0 4 4 0 8 0 vmmpepl 168 454664 0 453169 160 62 98 121 0 357 13 vmsppl 488 7371 0 7346 6 1 5 5 0 8 0 rwobjpl 80 116639 0 109750 169 16 153 157 0 8 1 pdppl 4096 14751 0 14692 175 112 63 85 0 8 4 pvpl 32 28796 0 0 229 0 229 229 0 265 0 pmappl 256 7371 0 7346 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 501 0 197 10 0 10 10 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: 0x7ce0c2904d10, 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:654 comcnputc(800,66) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,66) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(66) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(66) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83312dc5) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d7a51) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff8000340172e0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff8000340172e0) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000015ec000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 end trace frame: 0xffff800034017410, 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:654 comcnputc(800,66) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,66) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(66) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(66) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83312dc5) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d7a51) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff8000340172e0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff8000340172e0) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000015ec000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80002a329268) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a329268) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800034017490) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806ea2fd98,81,fffffd80097fb270,ffff80002a329268) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b9eedf0,ffff80002a329268) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b9eedf0,ffff80002a329268) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b9eedf0,ffff80002a329268) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b9eedf0,ffff80002a329268) at closef+0x192 sys/kern/kern_descrip.c:1264 finishdup(ffff80002a329268,fffffd80673a6720,7,5,ffff8000340176f0,2) at finishdup+0x478 sys/kern/kern_descrip.c:688 syscall(ffff8000340177a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000340177a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a6efb2dff0, count: -23