*cpu1: uvm_fault(0xfffffd807ae70998, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xad49069a080, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a33ab20 rbx 0 rdx 0xffff800001589f40 rcx 0xffff8000ffff19c8 rax 0x2a r8 0xffff80002a33aa50 r9 0 r10 0xbe443a2826c5f0be r11 0xce2d0fe62991c937 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff812ca4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a33aaa0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=15903 pid=45357 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff0cf8,0xffffffff838c7cf8 process=0xffff80003740e560 user=0xffff80002a335000, vmspace=0xfffffd807ae70038 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 45357 464424 25561 0 2 0 syz-executor *45357 15903 25561 0 7 0x4000000 syz-executor 15578 256606 50744 0 3 0x80 nanoslp syz-executor 15578 74095 50744 0 2 0x4000000 syz-executor 15578 122312 50744 0 3 0x4000080 fsleep syz-executor 15578 253931 50744 0 3 0x4000080 fsleep syz-executor 29808 226483 48776 0 3 0x80 nanoslp syz-executor 29808 344690 48776 0 3 0x4000080 ttyout syz-executor 29808 170465 48776 0 3 0x4000080 fsleep syz-executor 29808 109260 48776 0 3 0x4000080 ttyout syz-executor 29808 149216 48776 0 3 0x4000080 fsleep syz-executor 63281 3764 90095 0 3 0x80 nanoslp syz-executor 63281 23698 90095 0 3 0x4000080 fifor syz-executor 63281 108794 90095 0 3 0x4000080 fsleep syz-executor 45487 34616 99157 60928 2 0x10 syz-executor 45487 198688 99157 60928 3 0x4000090 fifor syz-executor 45487 89905 99157 60928 3 0x4000090 fsleep syz-executor 5130 309663 49556 0 3 0x80 nanoslp syz-executor 5130 302002 49556 0 3 0x4000080 sbwait syz-executor 5130 111449 49556 0 3 0x4000080 fsleep syz-executor 26332 72322 20459 0 3 0x80 nanoslp syz-executor 26332 62956 20459 0 3 0x4000080 kqsel syz-executor 26332 200398 20459 0 3 0x4000080 fsleep syz-executor 26332 316148 20459 0 3 0x4000080 fsleep syz-executor 87394 426055 1 0 3 0x100083 ttyin getty 49556 456116 83784 0 3 0x82 nanoslp syz-executor 20459 397683 83784 0 3 0x82 nanoslp syz-executor 81901 150383 0 0 3 0x14200 acct acct 90095 302040 83784 0 3 0x82 nanoslp syz-executor 69367 523244 0 0 3 0x14280 nfsidl nfsio 89075 498098 0 0 3 0x14280 nfsidl nfsio 86140 309235 0 0 3 0x14280 nfsidl nfsio 24764 40727 0 0 3 0x14280 nfsidl nfsio 51792 291242 0 0 3 0x14280 nfsidl nfsio 19700 150370 0 0 3 0x14280 nfsidl nfsio 94448 261830 0 0 3 0x14280 nfsidl nfsio 87918 158335 0 0 3 0x14280 nfsidl nfsio 85261 446046 0 0 3 0x14280 nfsidl nfsio 5476 422441 0 0 3 0x14280 nfsidl nfsio 4033 308317 0 0 3 0x14280 nfsidl nfsio 48264 262055 0 0 3 0x14280 nfsidl nfsio 52244 47626 0 0 3 0x14280 nfsidl nfsio 1889 423908 0 0 3 0x14280 nfsidl nfsio 58628 467390 0 0 3 0x14280 nfsidl nfsio 41036 160126 0 0 3 0x14280 nfsidl nfsio 81175 411289 0 0 3 0x14280 nfsidl nfsio 38487 404438 0 0 3 0x14280 nfsidl nfsio 78465 398759 0 0 3 0x14280 nfsidl nfsio 31322 176001 0 0 3 0x14280 nfsidl nfsio 50744 210487 83784 0 3 0x82 nanoslp syz-executor 99157 510823 83784 0 2 0x2 syz-executor 25561 187655 83784 0 3 0x82 nanoslp syz-executor 93106 160216 83784 0 3 0x82 nanoslp syz-executor 48776 491079 83784 0 3 0x82 nanoslp syz-executor 72463 79283 0 0 3 0x14200 bored sosplice 83784 417514 65614 0 3 0x82 kqread syz-executor 65614 101472 86508 0 3 0x10008a sigsusp ksh 86508 497159 84108 0 3 0x98 kqread sshd-session 84108 187068 27658 0 3 0x92 kqread sshd-session 27658 255732 1 0 3 0x88 kqread sshd 44828 250421 78814 74 3 0x1100092 bpf pflogd 78814 386797 1 0 3 0x80 sbwait pflogd 43948 243563 72933 73 3 0x1100090 kqread syslogd 72933 74965 1 0 3 0x100082 sbwait syslogd 60318 265509 1 0 3 0x100080 kqread resolvd 42390 470417 58069 77 3 0x100092 kqread dhcpleased 51695 215120 58069 77 3 0x100092 kqread dhcpleased 58069 171308 1 0 3 0x80 kqread dhcpleased 16972 223532 0 0 3 0x14200 bored smr 51404 509876 0 0 3 0x14200 pgzero zerothread 51501 93864 0 0 3 0x14200 aiodoned aiodoned 56573 396179 0 0 3 0x14200 syncer update 52474 87599 0 0 3 0x14200 cleaner cleaner 94954 144349 0 0 3 0x14200 reaper reaper 3847 168756 0 0 3 0x14200 pgdaemon pagedaemon 83382 152665 0 0 3 0x14200 bored viomb 59967 190241 0 0 3 0x40014200 acpi0 acpi0 2805 286840 0 0 3 0x40014200 idle1 43471 234952 0 0 3 0x14200 bored softnet3 61666 299528 0 0 3 0x14200 bored softnet2 44041 521781 0 0 3 0x14200 bored softnet1 10777 202061 0 0 3 0x14200 bored softnet0 21099 238512 0 0 3 0x14200 bored systqmp 92434 78386 0 0 3 0x14200 bored systq 46307 289526 0 0 3 0x14200 tmoslp softclockmp 65642 450776 0 0 3 0x40014200 tmoslp softclock 31927 162414 0 0 3 0x40014200 idle0 1 380364 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 (0xfffffd806bd34210) #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+0x1fb sys/uvm/uvm_fault.c:956 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:671 #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 45357 (syz-executor) thread 0xffff8000ffff19c8 (15903) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10257 11229K 11885K 166960K 19903 0 pcb 18 16K 18K 166960K 1203 0 rtable 252 14K 14K 166960K 1788 0 pf 38 18K 20K 166960K 337 0 ifaddr 43 9K 9K 166960K 267 0 ifgroup 59 2K 2K 166960K 432 0 sysctl 4 1K 3K 166960K 15 0 counters 66 36K 37K 166960K 460 0 ioctlops 0 0K 4K 166960K 2365 0 iov 0 0K 16K 166960K 674 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1490 94K 94K 166960K 6236 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 20K 28K 166960K 110 0 VM map 2 1K 1K 166960K 2 0 sem 21 49K 69K 166960K 52 0 dirhash 12 2K 2K 166960K 96 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 5460 0 sigio 0 0K 0K 166960K 153 0 proc 72 91K 127K 166960K 1695 0 subproc 72 4K 4K 166960K 261 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 949 0 in_multi 79 5K 7K 166960K 469 0 ether_multi 1 0K 0K 166960K 39 0 mrt 1 0K 0K 166960K 40 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 1448 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 7 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 275 163K 180K 166960K 49935 0 UVM aobj 21 2K 2K 166960K 21 0 pinsyscall 43 86K 104K 166960K 7152 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 302 0 NDP 13 0K 2K 166960K 207 0 temp 83 8692K 8820K 166960K 232554 0 kqueue 15 24K 33K 166960K 975 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 120 618 0 613 7 5 2 3 0 8 1 rtentry 176 619 0 517 6 1 5 6 0 8 0 unpcb 144 3978 0 3948 24 20 4 6 0 8 2 syncache 336 11 0 11 4 4 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 1981 0 1974 40 36 4 8 0 8 3 arp 128 140 0 121 1 0 1 1 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 384 6268 0 6253 61 53 8 18 0 8 6 nd6 144 97 0 77 2 1 1 2 0 8 0 pkpcb 40 48 0 48 9 8 1 1 0 8 1 kcovpl 48 29 0 21 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 155 0 155 6 5 1 1 0 8 1 pppxif 1504 4 0 4 3 3 0 1 0 8 0 pffrag 232 26 0 16 1 0 1 1 0 482 0 pffrnode 88 24 0 14 1 0 1 1 0 8 0 pffrent 40 68 0 58 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 24 288 0 198 1 0 1 1 0 8 0 pfstkey 128 289 0 199 4 0 4 4 0 8 0 pfstate 384 287 0 199 11 2 9 11 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 8 0 8 7 7 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1719 0 1322 42 17 25 32 0 8 0 art_table 32 1724 0 1322 6 2 4 5 0 8 0 art_node 16 601 0 511 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 4 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 43 0 24 1 0 1 1 0 8 0 shmpl 112 18 0 0 1 0 1 1 0 8 0 dirhash 1024 74 0 57 3 0 3 3 0 8 0 dino2pl 256 11226 0 9667 98 0 98 98 0 8 0 ffsino 288 11226 0 9667 113 1 112 112 0 8 0 nchpl 144 18807 0 18211 65 39 26 65 0 8 0 rtmask 32 33 0 33 7 6 1 1 0 8 1 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 67188 0 67188 4 3 1 2 0 8 1 percpumem 16 245 0 197 1 0 1 1 0 8 0 kstatmem 264 298 0 272 4 1 3 3 0 8 0 scsiplug 72 20 0 20 7 6 1 1 0 8 1 scxspl 216 57628 0 57628 22 20 2 8 1 8 2 plimitpl 152 983 0 966 1 0 1 1 0 8 0 sigapl 424 5787 0 5715 15 5 10 11 0 8 0 futexpl 64 79143 0 79134 1 0 1 1 0 8 0 knotepl 120 870 0 0 24 0 24 24 0 8 0 kqueuepl 224 1997 0 1985 17 15 2 5 0 8 1 pipepl 336 868 0 839 23 17 6 11 0 8 3 fdescpl 520 5698 0 5666 3 0 3 3 0 8 0 filepl 160 40005 0 39760 50 34 16 20 0 8 1 lockfpl 104 1811 0 1808 3 1 2 2 0 8 1 lockfspl 48 618 0 615 1 0 1 1 0 8 0 sessionpl 144 56 0 47 1 0 1 1 0 8 0 pgrppl 48 196 0 179 1 0 1 1 0 8 0 ucredpl 104 6243 0 6227 1 0 1 1 0 8 0 zombiepl 144 5981 0 5980 3 2 1 1 0 8 0 processpl 1192 5787 0 5715 9 2 7 8 0 8 0 procpl 656 14188 0 14099 11 2 9 9 0 8 0 srpgc 96 46 0 46 6 6 0 1 0 8 0 sosppl 168 37 0 37 9 8 1 1 0 8 1 sockpl 728 10982 0 10931 91 81 10 22 0 8 4 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 14 1 13 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 59 0 0 5 0 5 5 0 8 0 mtagpl 96 220 0 0 5 0 5 5 0 8 0 mbufpl 256 1469 0 0 84 0 84 84 0 8 0 bufpl 280 16232 0 10089 440 0 440 440 0 8 0 anonpl 32 17369 0 0 140 0 140 140 0 246 0 amapchunkpl 152 168367 0 167460 83 47 36 37 0 158 0 amappl16 200 11410 0 10905 93 55 38 40 0 8 0 amappl15 192 9 0 9 2 2 0 1 0 8 0 amappl14 184 196 0 184 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 6704 0 6672 3 1 2 2 0 8 0 amappl11 160 102 0 87 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 241 0 240 2 1 1 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 168 0 155 1 0 1 1 0 8 0 amappl6 120 403 0 398 1 0 1 1 0 8 0 amappl5 112 215 0 204 1 0 1 1 0 8 0 amappl4 104 441 0 419 1 0 1 1 0 8 0 amappl3 96 35976 0 35844 5 1 4 4 0 8 0 amappl2 88 1036 0 968 2 0 2 2 0 8 0 amappl1 80 34036 0 33427 17 2 15 15 0 8 0 amappl 88 47819 0 47615 5 0 5 5 0 92 0 dma65536 65536 4 0 4 3 3 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 14 0 14 6 6 0 1 0 8 0 dma128 128 257 0 257 4 4 0 1 0 8 0 dma64 64 8 0 8 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 20 0 0 1 0 1 1 0 8 0 uaddrrnd 24 5698 0 5666 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5698 0 5666 1 0 1 1 0 8 0 vmmpekpl 168 40495 0 40418 4 0 4 4 0 8 0 vmmpepl 168 352069 0 349434 159 32 127 133 0 357 1 vmsppl 480 5697 0 5666 8 3 5 5 0 8 0 rwobjpl 72 85677 0 78262 142 3 139 139 0 8 0 pdppl 4096 11404 0 11332 164 92 72 86 0 8 0 pvpl 32 24980 0 0 200 0 200 200 0 265 0 pmappl 256 5697 0 5666 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 618 0 183 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: 0xad49069a080, 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 __sanitizer_cov_trace_const_cmp1(800,66) at __sanitizer_cov_trace_const_cmp1+0xb sys/dev/kcov.c:217 cnputc(66) at cnputc+0x61 sys/dev/cons.c:218 kputchar(66,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 printf(ffffffff834381ba) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80002a3469b0,6) at trap_print+0x64 sys/arch/amd64/amd64/trap.c:457 kerntrap(ffff80002a3469b0) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001405000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff8000ffff0548) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff0548) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a346b60) at spec_close+0x45f sys/kern/spec_vnops.c:-1 end trace frame: 0xffff80002a346bd0, 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 __sanitizer_cov_trace_const_cmp1(800,66) at __sanitizer_cov_trace_const_cmp1+0xb sys/dev/kcov.c:217 cnputc(66) at cnputc+0x61 sys/dev/cons.c:218 kputchar(66,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 printf(ffffffff834381ba) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80002a3469b0,6) at trap_print+0x64 sys/arch/amd64/amd64/trap.c:457 kerntrap(ffff80002a3469b0) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001405000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff8000ffff0548) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff0548) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a346b60) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d4f5560,81,fffffd807f7d35b0,ffff8000ffff0548) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806befeb70,ffff8000ffff0548) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806befeb70,ffff8000ffff0548) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806befeb70,ffff8000ffff0548) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd806befeb70,ffff8000ffff0548) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff8000ffff0548) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff8000ffff0548,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff0548,ffff80002a346ed0,ffff80002a346e20) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a346ed0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a346ed0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d1a13520d20, count: -23