*cpu1: uvm_fault(0xfffffd8073fcd018, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7391cb659430, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c02f6c0 rbx 0 rdx 0 rcx 0xffff80003c4fa7e8 rax 0x2a r8 0xffff80003c02f5f0 r9 0 r10 0xef52d8557d829413 r11 0x14a6deb3f64ab038 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff817e24c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c02f640 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=106889 pid=56980 tcnt=1 stat=onproc flags process=0 proc=0 runpri=80, usrpri=80, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4faa78,0xffffffff839c43f8 process=0xffff800032ffc020 user=0xffff80003c02a000, vmspace=0xfffffd800b1031f8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *56980 106889 46393 0 7 0 syz-executor 35987 130731 1733 0 2 0 syz-executor 11877 113010 51838 0 2 0 syz-executor 31653 328678 76716 0 2 0 syz-executor 31653 28466 76716 0 3 0x4000080 fsleep syz-executor 81395 55648 1702 0 2 0 syz-executor 81395 464330 1702 0 3 0x4000080 fsleep syz-executor 81395 35624 1702 0 3 0x4000000 smrbar syz-executor 92495 280864 46700 0 2 0 syz-executor 92495 192056 46700 0 3 0x4000080 fsleep syz-executor 92495 175880 46700 0 2 0x4000000 syz-executor 3739 362027 0 0 3 0x14200 acct acct 72357 410483 1 0 3 0x100083 ttyin getty 74342 247917 0 0 3 0x14200 bored sosplice 88195 426901 0 0 3 0x14280 nfsidl nfsio 18748 320623 0 0 3 0x14280 nfsidl nfsio 69196 369603 0 0 3 0x14280 nfsidl nfsio 66480 128108 0 0 3 0x14280 nfsidl nfsio 10205 227953 0 0 3 0x14280 nfsidl nfsio 55131 305988 0 0 3 0x14280 nfsidl nfsio 86128 388380 0 0 3 0x14280 nfsidl nfsio 25444 263930 0 0 3 0x14280 nfsidl nfsio 83804 20342 0 0 3 0x14280 nfsidl nfsio 96028 222452 0 0 3 0x14280 nfsidl nfsio 91112 451893 0 0 3 0x14280 nfsidl nfsio 2778 169045 0 0 3 0x14280 nfsidl nfsio 22206 484992 0 0 3 0x14280 nfsidl nfsio 1339 423794 0 0 3 0x14280 nfsidl nfsio 90250 385727 0 0 3 0x14280 nfsidl nfsio 31267 24957 0 0 3 0x14280 nfsidl nfsio 4623 189633 0 0 3 0x14280 nfsidl nfsio 39697 61294 0 0 3 0x14280 nfsidl nfsio 46172 89514 0 0 3 0x14280 nfsidl nfsio 23703 333311 0 0 3 0x14280 nfsidl nfsio 1702 153604 44222 0 3 0x82 nanoslp syz-executor 46393 102766 44222 0 3 0x82 nanoslp syz-executor 76716 172760 44222 0 3 0x82 nanoslp syz-executor 1733 416498 44222 0 3 0x82 nanoslp syz-executor 12243 96677 44222 0 3 0x82 nanoslp syz-executor 51838 285753 44222 0 2 0x2 syz-executor 68797 384685 44222 0 2 0x2 syz-executor 46700 309952 44222 0 3 0x82 nanoslp syz-executor 44222 297132 30533 0 3 0x82 kqread syz-executor 30533 103635 90562 0 3 0x10008a sigsusp ksh 90562 94988 94844 0 3 0x98 kqread sshd-session 94844 167757 46686 0 3 0x92 kqread sshd-session 46686 476278 1 0 3 0x88 kqread sshd 66843 167102 80390 74 3 0x1100092 bpf pflogd 80390 255366 1 0 3 0x80 sbwait pflogd 56597 267295 18047 73 3 0x1100090 kqread syslogd 18047 111910 1 0 3 0x100082 sbwait syslogd 66310 466145 1 0 3 0x100080 kqread resolvd 11582 210543 54072 77 3 0x100092 kqread dhcpleased 22245 20534 54072 77 3 0x100092 kqread dhcpleased 54072 498166 1 0 3 0x80 kqread dhcpleased 24616 455459 0 0 3 0x14200 bored smr 71915 410038 0 0 2 0x14200 zerothread 68334 96402 0 0 3 0x14200 aiodoned aiodoned 74920 470057 0 0 3 0x14200 syncer update 32410 357255 0 0 3 0x14200 cleaner cleaner 87252 436899 0 0 3 0x14200 reaper reaper 71073 253994 0 0 3 0x14200 pgdaemon pagedaemon 84775 109014 0 0 3 0x14200 bored viomb 86596 351064 0 0 3 0x40014200 acpi0 acpi0 43970 116369 0 0 3 0x40014200 idle1 70568 163271 0 0 3 0x14200 bored softnet7 5564 411500 0 0 3 0x14200 bored softnet6 92186 393874 0 0 3 0x14200 bored softnet5 13122 168475 0 0 3 0x14200 bored softnet4 93401 454322 0 0 3 0x14200 bored softnet3 5231 322727 0 0 3 0x14200 bored softnet2 7001 487128 0 0 3 0x14200 bored softnet1 51538 393478 0 0 3 0x14200 bored softnet0 81861 342006 0 0 3 0x14200 bored systqmp 36851 342025 0 0 3 0x14200 bored systq 11527 429067 0 0 3 0x14200 tmoslp softclockmp 95083 135905 0 0 3 0x40014200 tmoslp softclock 8741 388429 0 0 3 0x40014200 idle0 1 349617 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 56980 (syz-executor) thread 0xffff80003c4fa7e8 (106889) exclusive rwlock amaplk r = 0 (0xfffffd806d1ac258) #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+0x42b sys/kern/kern_rwlock.c:320 #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:192 #5 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd800b1032f8) #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+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+0x403 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 Process 81395 (syz-executor) thread 0xffff80003c4faf98 (35624) exclusive rwlock clonelk r = 0 (0xffffffff837e18c8) #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+0x42b sys/kern/kern_rwlock.c:320 #2 if_clone_destroy+0x67 sys/net/if.c:-1 #3 ifioctl+0x5c5 sys/net/if.c:-1 #4 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10236 11148K 11415K 166960K 11645 0 pcb 17 12K 12K 166960K 91 0 rtable 167 8K 8K 166960K 319 0 pf 35 17K 22K 166960K 89 0 ifaddr 35 5K 7K 166960K 62 0 ifgroup 55 2K 2K 166960K 89 0 sysctl 3 1K 9K 166960K 9 0 counters 68 36K 37K 166960K 114 0 ioctlops 0 0K 4K 166960K 1639 0 iov 0 0K 24K 166960K 20 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1344 85K 85K 166960K 1617 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 16 0K 0K 166960K 25 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 476 0 sigio 1 0K 0K 166960K 13 0 proc 72 115K 164K 166960K 577 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 94 0 in_multi 68 5K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 396 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 223 159K 174K 166960K 6045 0 UVM aobj 9 4K 4K 166960K 11 0 pinsyscall 42 84K 104K 166960K 1550 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 19 0 NDP 12 0K 2K 166960K 41 0 temp 43 8671K 8927K 166960K 18415 0 kqueue 14 22K 26K 166960K 92 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 59 0 55 1 0 1 1 0 8 0 rtentry 176 100 0 35 5 0 5 5 0 8 0 unpcb 144 229 0 209 2 0 2 2 0 8 1 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 75 0 69 1 0 1 1 0 8 0 arp 128 10 0 2 1 0 1 1 0 8 0 inpcb 328 401 0 390 8 5 3 7 0 8 2 nd6 144 18 0 4 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 20 0 20 1 0 1 1 0 8 1 pppxif 1504 2 0 2 2 1 1 1 0 8 1 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 4 0 2 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 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 1 0 1 1 0 1 1 0 8 1 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 52 0 10 1 0 1 1 0 8 0 pfstkey 128 52 0 10 2 0 2 2 0 8 0 pfstate 384 51 0 10 5 0 5 5 0 8 0 pfrule 1344 25 0 20 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 458 0 161 28 3 25 28 0 8 2 art_table 40 460 0 161 5 0 5 5 0 8 0 art_node 32 100 0 43 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 20 0 6 1 0 1 1 0 8 0 shmpl 112 8 0 2 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2233 0 724 95 0 95 95 0 8 0 ffsino 296 2233 0 724 117 0 117 117 0 8 0 nchpl 144 2862 0 1172 63 0 63 63 0 8 0 rtmask 32 6 0 6 2 1 1 1 0 8 1 uvmvnodes 80 2432 0 0 50 0 50 50 0 8 0 vnodes 216 2432 0 0 136 0 136 136 0 8 0 namei 1024 9333 0 9333 2 1 1 2 0 8 1 percpumem 16 72 0 23 1 0 1 1 0 8 0 kstatmem 264 54 0 26 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 15081 0 15081 10 2 8 8 1 8 8 plimitpl 152 89 0 72 1 0 1 1 0 8 0 sigapl 424 789 0 714 9 0 9 9 0 8 0 knotepl 120 505 0 0 16 0 16 16 0 8 0 kqueuepl 224 191 0 181 5 0 5 5 0 8 4 pipepl 344 126 0 98 3 0 3 3 0 8 0 fdescpl 528 745 0 714 3 0 3 3 0 8 0 filepl 160 3596 0 3369 14 1 13 14 0 8 2 lockfpl 104 192 0 190 1 0 1 1 0 8 0 lockfspl 48 80 0 78 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 104 463 0 450 1 0 1 1 0 8 0 zombiepl 144 715 0 714 1 0 1 1 0 8 0 processpl 1248 789 0 714 6 0 6 6 0 8 0 procpl 656 1388 0 1308 8 0 8 8 0 8 0 sosppl 168 3 0 3 2 1 1 1 0 8 1 sockpl 752 706 0 671 12 6 6 11 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 159 0 0 10 0 10 10 0 8 0 bufpl 280 6708 0 566 439 0 439 439 0 8 0 anonpl 32 8977 0 0 73 0 73 73 0 246 0 amapchunkpl 152 19362 0 18925 31 3 28 28 0 158 8 amappl16 200 2791 0 2767 17 6 11 16 0 8 5 amappl15 192 74 0 74 1 1 0 1 0 8 0 amappl14 184 117 0 104 1 0 1 1 0 8 0 amappl13 176 2 0 2 2 2 0 1 0 8 0 amappl12 168 1385 0 1357 4 1 3 3 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 322 0 321 1 0 1 1 0 8 0 amappl8 136 18 0 16 1 0 1 1 0 8 0 amappl7 128 105 0 93 1 0 1 1 0 8 0 amappl6 120 183 0 179 1 0 1 1 0 8 0 amappl5 112 126 0 117 1 0 1 1 0 8 0 amappl4 104 302 0 280 1 0 1 1 0 8 0 amappl3 96 3488 0 3389 4 0 4 4 0 8 0 amappl2 88 643 0 580 2 0 2 2 0 8 0 amappl1 80 9696 0 9097 15 0 15 15 0 8 0 amappl 88 5314 0 5163 5 0 5 5 0 92 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 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 10 0 2 1 0 1 1 0 8 0 uaddrrnd 24 745 0 714 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 745 0 714 1 0 1 1 0 8 0 vmmpekpl 168 7832 0 7793 2 0 2 2 0 8 0 vmmpepl 168 53064 0 51121 99 3 96 99 0 357 6 vmsppl 488 744 0 714 5 1 4 5 0 8 0 rwobjpl 80 19226 0 15879 70 0 70 70 0 8 0 pdppl 4096 1497 0 1428 97 26 71 85 0 8 2 pvpl 32 14834 0 0 121 1 120 120 0 265 0 pmappl 256 744 0 714 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 267 0 34 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: 0x7391cb659430, 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:666 acpitimer_delay(1) at acpitimer_delay+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,20) at comcnputc+0x29b 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(ffffffff834104fa) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833b16fc) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c46d360,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:294 kerntrap(ffff80003c46d360) at kerntrap+0x13c sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c46d440, 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:666 acpitimer_delay(1) at acpitimer_delay+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,20) at comcnputc+0x29b 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(ffffffff834104fa) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833b16fc) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c46d360,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:294 kerntrap(ffff80003c46d360) at kerntrap+0x13c sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001482000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c448028) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c448028) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c46d510) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80688b8be8,81,fffffd80097fb068,ffff80003c448028) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805ed1fc48,ffff80003c448028) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805ed1fc48,ffff80003c448028) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805ed1fc48,ffff80003c448028) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805ed1fc48,ffff80003c448028) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c448028) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c448028,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c448028,ffff80003c46d880,ffff80003c46d7d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c46d880) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c46d880) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7169749307c0, count: -26