*cpu0: uvm_fault(0xfffffd8070751740, 0x668, 0, 2) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffd7b50, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800027adacf0 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff800027adac20 r9 0 r10 0xae3dcb87daa85def r11 0x8c8072d2f5fc9e49 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8194e50c proc_trampoline+0xdc cs 0x8 rflags 0x246 rsp 0xffff800027adac70 ss 0 proc_trampoline+0xdc: movl $0,%gs:0x538 ddb{1}> show proc PROC (syz-executor.2) pid=283017 stat=onproc flags process=0 proc=0 pri=78, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff80002125ed28,0xffffffff8293ceb0 process=0xffff8000ffff8858 user=0xffff800027ad5000, vmspace=0xfffffd80707512f0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *98822 283017 63151 0 7 0 syz-executor.2 23312 171322 36285 0 2 0 syz-executor.0 23312 182907 36285 0 7 0x4000000 syz-executor.0 4034 208896 70914 0 3 0x82 nanoslp syz-executor.3 62922 385653 0 0 3 0x14200 bored sosplice 63151 134863 70914 0 2 0x2 syz-executor.2 27382 180360 70914 0 2 0x2 syz-executor.1 36285 122590 70914 0 3 0x82 nanoslp syz-executor.0 70914 518807 32471 0 3 0x82 thrsleep syz-fuzzer 70914 209110 32471 0 3 0x4000082 nanoslp syz-fuzzer 70914 490303 32471 0 3 0x4000082 thrsleep syz-fuzzer 70914 383211 32471 0 3 0x4000082 kqread syz-fuzzer 70914 297875 32471 0 3 0x4000082 thrsleep syz-fuzzer 70914 209975 32471 0 3 0x4000082 thrsleep syz-fuzzer 70914 103371 32471 0 3 0x4000082 thrsleep syz-fuzzer 70914 31718 32471 0 3 0x4000082 thrsleep syz-fuzzer 32471 274097 64174 0 3 0x10008a sigsusp ksh 64174 393077 42706 0 3 0x9a poll sshd 46595 410029 1 0 3 0x100083 ttyin getty 42706 509628 1 0 3 0x88 poll sshd 54413 337469 68016 74 3 0x100092 bpf pflogd 68016 49489 1 0 3 0x80 netio pflogd 70301 39395 50912 73 3 0x100090 kqread syslogd 50912 491370 1 0 3 0x100082 netio syslogd 35685 381755 1 0 3 0x100080 kqread resolvd 15915 254708 93243 77 3 0x100092 kqread dhcpleased 92834 443574 93243 77 3 0x100092 kqread dhcpleased 93243 466058 1 0 3 0x80 kqread dhcpleased 89736 498040 0 0 3 0x14200 bored smr 62058 382943 0 0 2 0x14200 zerothread 91162 247093 0 0 3 0x14200 aiodoned aiodoned 69118 17915 0 0 3 0x14200 syncer update 30094 246356 0 0 3 0x14200 cleaner cleaner 46588 181378 0 0 3 0x14200 reaper reaper 42841 359043 0 0 3 0x14200 pgdaemon pagedaemon 54563 53337 0 0 3 0x14200 bored viomb 87410 180729 0 0 3 0x40014200 acpi0 acpi0 77319 385193 0 0 3 0x40014200 idle1 29432 161522 0 0 3 0x14200 bored softnet 92152 507853 0 0 3 0x14200 bored systqmp 18956 250231 0 0 3 0x14200 bored systq 82149 36184 0 0 3 0x40014200 bored softclock 58972 44572 0 0 3 0x40014200 idle0 1 74099 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807f0008c8) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_enter+0x1af rcr3 machine/cpufunc.h:141 [inline] #3 pmap_enter+0x1af pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_enter+0x1af sys/arch/amd64/amd64/pmap.c:2691 #4 uvm_fault_upper+0x2b1 sys/uvm/uvm_fault.c:1033 #5 uvm_fault+0x164 sys/uvm/uvm_fault.c:610 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 Process 98822 (syz-executor.2) thread 0xffff80002125e548 (283017) exclusive rwlock amaplk r = 0 (0xfffffd806912bec0) #0 witness_lock+0x44d #1 uvm_fault_check+0x3ca sys/uvm/uvm_fault.c:774 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd8070751308) #0 witness_lock+0x44d #1 uvmfault_lookup+0xe9 sys/uvm/uvm_fault.c:1744 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807f0008c8) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_enter+0x1af rcr3 machine/cpufunc.h:141 [inline] #3 pmap_enter+0x1af pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_enter+0x1af sys/arch/amd64/amd64/pmap.c:2691 #4 uvm_fault_upper+0x2b1 sys/uvm/uvm_fault.c:1033 #5 uvm_fault+0x164 sys/uvm/uvm_fault.c:610 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 Process 23312 (syz-executor.0) thread 0xffff80002125ed28 (182907) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828f9c10) #0 witness_lock+0x44d #1 syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10157 6463K 6723K 78643K 12040 0 pcb 13 8K 8K 78643K 30 0 rtable 129 4K 4K 78643K 323 0 ifaddr 51 12K 13K 78643K 122 0 counters 46 34K 34K 78643K 72 0 ioctlops 0 0K 4K 78643K 1522 0 iov 0 0K 12K 78643K 39 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1233 78K 78K 78643K 1498 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 27 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 49K 78643K 885 0 sigio 0 0K 0K 78643K 16 0 proc 70 87K 99K 78643K 528 0 subproc 52 3K 3K 78643K 91 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 24 0 in_multi 44 2K 3K 78643K 96 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 2K 78643K 528 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 212 46K 47K 78643K 11583 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 14 0 NDP 7 0K 1K 78643K 34 0 temp 57 4192K 4272K 78643K 7822 0 kqueue 10 14K 18K 78643K 44 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 42 0 39 1 0 1 1 0 8 0 rtentry 112 100 0 45 2 0 2 2 0 8 0 unpcb 136 139 0 124 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 394 0 394 1 1 0 1 0 8 0 tcpcb 736 80 0 68 4 2 2 2 0 8 0 arp 120 16 0 8 1 0 1 1 0 8 0 inpcb 304 235 0 228 1 0 1 1 0 8 0 nd6 48 21 0 12 1 0 1 1 0 8 0 kcovpl 48 7 0 3 1 0 1 1 0 8 0 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 9 0 7 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 6 1 0 1 1 0 8 0 pfstkey 112 13 0 6 1 0 1 1 0 8 0 pfstate 320 13 0 6 2 0 2 2 0 8 0 pfrule 1360 29 0 20 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 414 0 182 18 0 18 18 0 8 2 art_table 32 415 0 182 3 0 3 3 0 8 0 art_node 16 99 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2392 0 977 89 0 89 89 0 8 0 ffsino 272 2392 0 977 95 0 95 95 0 8 0 nchpl 144 3524 0 1921 61 0 61 61 0 8 0 uvmvnodes 80 2668 0 0 55 0 55 55 0 8 0 vnodes 224 2668 0 0 157 0 157 157 0 8 0 namei 1024 9585 0 9585 1 0 1 1 0 8 1 percpumem 16 48 0 13 1 0 1 1 0 8 0 scsiplug 72 4 0 4 1 0 1 1 0 8 1 scxspl 216 11284 0 11284 12 8 4 8 0 8 4 plimitpl 152 42 0 31 1 0 1 1 0 8 0 sigapl 424 1115 0 1079 5 0 5 5 0 8 0 futexpl 64 3395 0 3395 1 0 1 1 0 8 1 knotepl 112 67 0 0 2 0 2 2 0 8 0 kqueuepl 216 70 0 64 1 0 1 1 0 8 0 pipepl 336 109 0 93 2 0 2 2 0 8 0 fdescpl 496 1100 0 1079 4 1 3 4 0 8 0 filepl 152 3182 0 3031 7 0 7 7 0 8 1 lockfpl 104 72 0 70 1 0 1 1 0 8 0 lockfspl 48 35 0 33 1 0 1 1 0 8 0 sessionpl 144 23 0 10 1 0 1 1 0 8 0 pgrppl 48 28 0 15 1 0 1 1 0 8 0 ucredpl 96 313 0 301 1 0 1 1 0 8 0 zombiepl 144 1079 0 1077 1 0 1 1 0 8 0 processpl 1064 1115 0 1077 3 0 3 3 0 8 0 procpl 672 1968 0 1922 5 0 5 5 0 8 0 srpgc 96 8 0 8 1 0 1 1 0 8 1 sosppl 168 8 0 8 1 1 0 1 0 8 0 sockpl 480 416 0 391 5 1 4 5 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 144 0 0 17 0 17 17 0 8 0 mtagpl 96 86 0 0 3 0 3 3 0 8 0 mbufpl 256 431 0 0 26 0 26 26 0 8 0 bufpl 288 4888 0 142 339 0 339 339 0 8 0 anonpl 24 279872 0 269684 99 25 74 95 0 186 0 amapchunkpl 152 27971 0 27450 26 2 24 25 0 158 2 amappl16 200 3785 0 3473 30 12 18 29 0 8 1 amappl15 192 20 0 20 2 1 1 1 0 8 1 amappl14 184 33 0 26 1 0 1 1 0 8 0 amappl13 176 59 0 58 1 0 1 1 0 8 0 amappl12 168 576 0 570 1 0 1 1 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 63 0 53 1 0 1 1 0 8 0 amappl9 144 264 0 260 1 0 1 1 0 8 0 amappl8 136 614 0 578 2 0 2 2 0 8 0 amappl7 128 280 0 268 1 0 1 1 0 8 0 amappl6 120 173 0 157 1 0 1 1 0 8 0 amappl5 112 1163 0 1143 1 0 1 1 0 8 0 amappl4 104 690 0 668 1 0 1 1 0 8 0 amappl3 96 744 0 726 1 0 1 1 0 8 0 amappl2 88 576 0 534 2 1 1 2 0 8 0 amappl1 80 21342 0 20872 13 2 11 13 0 8 0 amappl 88 11205 0 11048 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1100 0 1079 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1100 0 1079 1 0 1 1 0 8 0 vmmpekpl 168 9731 0 9696 2 0 2 2 0 8 0 vmmpepl 168 101925 0 100229 105 12 93 93 0 357 11 vmsppl 368 1099 0 1079 3 0 3 3 0 8 0 rwobjpl 56 27813 0 24036 54 0 54 54 0 8 0 pdppl 4096 2208 0 2158 72 18 54 62 0 8 4 pvpl 32 588530 0 574917 159 28 131 156 0 265 3 pmappl 248 1099 0 1079 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 677 0 23 19 0 19 19 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82779ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_write_1(3f8,0,29) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,29) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,29) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(29) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(29) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff824fe220) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff824b579c) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff8000260cc240,668) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff8000260cc240) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pppacopen(4086331,1,2000,ffff80002125ed28) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 end trace frame: 0xffff8000260cc3b0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82779ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_write_1(3f8,0,29) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,29) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,29) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(29) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(29) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff824fe220) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff824b579c) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff8000260cc240,668) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff8000260cc240) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pppacopen(4086331,1,2000,ffff80002125ed28) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000260cc3c8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806c5f5db0,1,fffffd807f7d74e0,ffff80002125ed28) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000260cc618,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002125ed28,ffffff9c,200000c0,0,0,ffff8000260cc800) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000260cc870) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000260cc870) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76902cd1c0, count: -20 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xdc: movl $0,%gs:0x538 proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffd7b50, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0x7f7ffffd7b50, count: -1