*cpu1: uvm_fault(0xfffffd8008bae1c0, 0x7f87531a5248, 0, 2) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x717198845570, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002ef21b80 rbx 0 rdx 0 rcx 0xffff80002a210540 rax 0x2a r8 0xffff80002ef21ab0 r9 0 r10 0xeebcc05e3b1608f2 r11 0x4d481772989773ac r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81fc64d7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002ef21b00 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x660 ddb{0}> show proc PROC (syz-executor.5) tid=9040 pid=77628 tcnt=1 stat=onproc flags process=0 proc=0 runpri=83, usrpri=83, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a20f550,0xffffffff82dc86e0 process=0xffff8000ffff0488 user=0xffff80002ef1c000, vmspace=0xfffffd8079fc2040 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *77628 9040 14184 0 7 0 syz-executor.5 97050 365825 94111 0 2 0 syz-executor.6 97050 185529 94111 0 2 0x4000000 syz-executor.6 1690 252683 8836 0 2 0 syz-executor.4 1690 280239 8836 0 3 0x4000080 piperd syz-executor.4 61701 399280 64462 0 2 0 syz-executor.2 26873 211058 69413 0 2 0 syz-executor.0 26873 6167 69413 0 2 0x4000000 syz-executor.0 13053 36944 1673 0 2 0x2 syz-executor.7 69413 423916 1673 0 3 0x82 nanoslp syz-executor.0 64462 315795 1673 0 2 0x2 syz-executor.2 94111 94352 1673 0 3 0x82 nanoslp syz-executor.6 14184 385929 1673 0 3 0x82 nanoslp syz-executor.5 88825 449142 0 0 3 0x14200 acct acct 11680 479255 1 0 3 0x100083 ttyin getty 39369 489241 1673 0 3 0x2 biowait syz-executor.1 31888 447447 1673 0 3 0x82 nanoslp syz-executor.3 36357 309746 0 0 3 0x14200 bored sosplice 8836 156496 1673 0 3 0x82 nanoslp syz-executor.4 1673 341919 82469 0 2 0x2000002 syz-fuzzer 1673 370693 82469 0 3 0x6000082 nanoslp syz-fuzzer 1673 57101 82469 0 3 0x6000082 thrsleep syz-fuzzer 1673 495117 82469 0 3 0x6000082 thrsleep syz-fuzzer 1673 53608 82469 0 3 0x6000082 wait syz-fuzzer 1673 232621 82469 0 3 0x6000082 wait syz-fuzzer 1673 452822 82469 0 3 0x6000082 wait syz-fuzzer 1673 326468 82469 0 3 0x6000082 wait syz-fuzzer 1673 83125 82469 0 3 0x6000082 kqread syz-fuzzer 1673 92190 82469 0 3 0x6000082 wait syz-fuzzer 1673 191055 82469 0 3 0x6000082 wait syz-fuzzer 1673 217527 82469 0 3 0x6000082 thrsleep syz-fuzzer 1673 37950 82469 0 3 0x6000082 thrsleep syz-fuzzer 1673 14474 82469 0 3 0x6000082 wait syz-fuzzer 1673 131759 82469 0 3 0x6000082 thrsleep syz-fuzzer 1673 921 82469 0 3 0x6000082 wait syz-fuzzer 82469 285057 4525 0 3 0x10008a sigsusp ksh 4525 95155 1925 0 7 0x12 sshd 1925 249108 1 0 3 0x88 kqread sshd 40263 440033 66713 74 3 0x1100092 bpf pflogd 66713 240042 1 0 3 0x80 netio pflogd 68641 508370 20684 73 3 0x1100090 kqread syslogd 20684 412053 1 0 3 0x100082 netio syslogd 97754 271 1 0 3 0x100080 kqread resolvd 69081 249973 9747 77 3 0x100092 kqread dhcpleased 92148 230405 9747 77 3 0x100092 kqread dhcpleased 9747 465020 1 0 3 0x80 kqread dhcpleased 89354 425066 0 0 3 0x14200 bored smr 57150 58552 0 0 2 0x14200 zerothread 53724 421745 0 0 3 0x14200 aiodoned aiodoned 23871 491870 0 0 3 0x14200 syncer update 55639 232655 0 0 3 0x14200 cleaner cleaner 48541 358285 0 0 3 0x14200 reaper reaper 55703 519991 0 0 3 0x14200 pgdaemon pagedaemon 82643 646 0 0 3 0x14200 bored viomb 54565 174569 0 0 3 0x40014200 acpi0 acpi0 95932 216319 0 0 3 0x40014200 idle1 2762 460699 0 0 3 0x14200 bored softnet3 49408 173644 0 0 3 0x14200 bored softnet2 75592 387787 0 0 3 0x14200 bored softnet1 65720 169298 0 0 2 0x14200 softnet0 95949 71099 0 0 3 0x14200 bored systqmp 68539 112942 0 0 3 0x14200 bored systq 26106 367775 0 0 3 0x14200 tmoslp softclockmp 3318 92060 0 0 3 0x40014200 tmoslp softclock 73405 481393 0 0 3 0x40014200 idle0 1 516536 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &map->flags_lock r = 0 (0xfffffd8079fc2198) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 vm_map_lock_ln+0x5f sys/uvm/uvm_map.c:5363 #4 uvmfault_lookup+0xb6 sys/uvm/uvm_fault.c:1779 #5 uvm_fault_check+0x65d uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #5 uvm_fault_check+0x65d sys/uvm/uvm_fault.c:710 #6 uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 #7 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806e31acb0) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 pmap_page_remove+0xa5 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_page_remove+0xa5 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:425 [inline] #3 pmap_page_remove+0xa5 sys/arch/amd64/amd64/pmap.c:1950 #4 uvm_anfree_list+0x98 #5 amap_wipeout+0x1c1 sys/uvm/uvm_amap.c:504 #6 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1366 #7 sys_munmap+0x22e sys/uvm/uvm_mmap.c:539 #8 syscall+0x5ae mi_syscall sys/sys/syscall_mi.h:183 [inline] #8 syscall+0x5ae sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 39369 (syz-executor.1) thread 0xffff80002a18c800 (489241) Process 4525 (sshd) thread 0xffff80002a18cd50 (95155) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10180 6466K 7387K 166960K 23978 0 pcb 15 14K 16K 166960K 404 0 rtable 173 5K 7K 166960K 1544 0 pf 26 8K 10K 166960K 507 0 ifaddr 34 15K 16K 166960K 343 0 ifgroup 43 2K 2K 166960K 965 0 sysctl 2 0K 0K 166960K 6 0 counters 58 35K 36K 166960K 528 0 ioctlops 0 0K 4K 166960K 6315 0 iov 0 0K 32K 166960K 1280 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1427 89K 89K 166960K 5367 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 65 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 372 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 89K 166960K 13095 0 sigio 0 0K 0K 166960K 359 0 proc 69 91K 127K 166960K 1218 0 subproc 104 6K 7K 166960K 365 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 425 0 in_multi 67 5K 7K 166960K 399 0 ether_multi 1 0K 0K 166960K 6 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 957 0 pfkey data 0 0K 0K 166960K 8 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 346 89K 98K 166960K 123157 0 UVM aobj 131 4K 4K 166960K 134 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 115 0 NDP 9 0K 2K 166960K 296 0 temp 74 6772K 6900K 166960K 208607 0 kqueue 12 18K 26K 166960K 1148 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 3235 0 3228 13 12 1 3 0 8 0 rtentry 112 316 0 238 5 2 3 4 0 8 0 unpcb 144 7329 0 7314 56 52 4 8 0 8 3 syncache 336 23 0 23 5 5 0 1 0 8 0 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 353 0 353 7 7 0 2 0 8 0 tcpcb 808 889 0 884 14 13 1 7 0 8 0 arp 120 55 0 42 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 392 2631 0 2623 60 59 1 9 0 8 0 nd6 136 79 0 64 1 0 1 1 0 8 0 pkpcb 40 56 0 56 7 7 0 1 0 8 0 kcovpl 48 28 0 20 1 0 1 1 0 8 0 ppxss 1168 9 0 9 2 2 0 1 0 8 0 pffrag 232 7 0 7 3 3 0 1 0 482 0 pffrnode 88 7 0 7 3 3 0 1 0 8 0 pffrent 40 27 0 27 3 3 0 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 24 113 0 110 1 0 1 1 0 8 0 pfstkey 128 113 0 110 2 1 1 2 0 8 0 pfstate 376 113 0 110 6 5 1 4 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 1269 0 936 42 21 21 29 0 8 0 art_table 32 1270 0 936 4 1 3 4 0 8 0 art_node 16 312 0 242 1 0 1 1 0 8 0 sysvmsgpl 40 34 0 26 2 1 1 1 0 8 0 semapl 112 364 0 354 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 17395 0 15752 103 0 103 103 0 8 0 ffsino 272 17395 0 15752 110 0 110 110 0 8 0 nchpl 144 35268 0 33614 63 0 63 63 0 8 0 uvmvnodes 80 8023 0 0 164 0 164 164 0 8 0 vnodes 216 8023 0 0 446 0 446 446 0 8 0 namei 1024 93037 0 93037 3 2 1 2 0 8 1 percpumem 16 278 0 235 1 0 1 1 0 8 0 vcpupl 2048 40 0 2 5 0 5 5 0 8 0 vmpool 696 45 0 7 4 0 4 4 0 8 0 kstatmem 264 488 0 470 2 0 2 2 0 8 0 scxspl 216 109952 0 109951 22 21 1 8 1 8 0 plimitpl 152 150 0 134 1 0 1 1 0 8 0 sigapl 424 13390 0 13341 7 0 7 7 0 8 0 futexpl 64 84813 0 84813 7 6 1 1 0 8 1 knotepl 120 270 0 0 8 1 7 7 0 8 1 kqueuepl 216 1812 0 1804 17 16 1 5 0 8 0 pipepl 320 4363 0 4334 68 62 6 9 0 8 3 fdescpl 496 13369 0 13341 8 4 4 5 0 8 0 filepl 152 57994 0 57748 82 69 13 20 0 8 1 lockfpl 104 1874 0 1872 4 3 1 2 0 8 0 lockfspl 48 628 0 626 1 0 1 1 0 8 0 sessionpl 144 45 0 28 1 0 1 1 0 8 0 pgrppl 48 73 0 56 1 0 1 1 0 8 0 ucredpl 104 2282 0 2270 1 0 1 1 0 8 0 zombiepl 144 13342 0 13341 1 0 1 1 0 8 0 processpl 1136 13390 0 13341 4 0 4 4 0 8 0 procpl 680 32879 0 32812 18 11 7 8 0 8 0 srpgc 96 23 0 23 9 9 0 1 0 8 0 sosppl 168 52 0 52 5 5 0 1 0 8 0 sockpl 584 13256 0 13226 123 115 8 17 0 8 5 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 15 0 0 2 0 2 2 0 8 0 mcl8k 8192 21 0 0 3 1 2 3 0 8 0 mcl4k 4096 26 0 0 4 1 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 481 0 0 38 11 27 38 0 8 0 mtagpl 96 516 0 0 13 1 12 13 0 8 1 mbufpl 256 1334 0 0 63 0 63 63 0 8 0 bufpl 280 25492 0 17468 574 0 574 574 0 8 0 anonpl 24 1457481 0 1446805 306 191 115 201 0 186 22 amapchunkpl 152 390663 0 389932 100 65 35 88 0 158 0 amappl16 200 35780 0 35447 144 113 31 44 0 8 9 amappl15 192 116 0 114 1 0 1 1 0 8 0 amappl14 184 290 0 272 5 4 1 2 0 8 0 amappl13 176 19 0 19 3 3 0 1 0 8 0 amappl12 168 14363 0 14326 3 1 2 2 0 8 0 amappl11 160 66 0 52 1 0 1 1 0 8 0 amappl10 152 72 0 60 2 1 1 1 0 8 0 amappl9 144 204 0 204 15 14 1 1 0 8 1 amappl8 136 596 0 470 5 0 5 5 0 8 0 amappl7 128 249 0 221 2 0 2 2 0 8 0 amappl6 120 590 0 573 1 0 1 1 0 8 0 amappl5 112 329 0 318 1 0 1 1 0 8 0 amappl4 104 708 0 675 2 1 1 2 0 8 0 amappl3 96 77394 0 77311 7 4 3 4 0 8 0 amappl2 88 14178 0 14094 4 1 3 4 0 8 0 amappl1 80 54602 0 54058 23 10 13 23 0 8 0 amappl 88 122355 0 122144 7 0 7 7 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 13414 0 13348 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 13414 0 13348 1 0 1 1 0 8 0 vmmpekpl 168 100840 0 100781 4 0 4 4 0 8 0 vmmpepl 168 781297 0 778975 262 132 130 137 0 357 14 vmsppl 448 13413 0 13348 9 1 8 8 0 8 0 rwobjpl 56 195596 0 185959 153 9 144 144 0 8 3 pdppl 4096 26835 0 26734 420 313 107 111 0 8 6 pvpl 32 48446 0 0 391 0 391 391 0 265 0 pmappl 248 13413 0 13348 5 0 5 5 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 976 0 499 15 0 15 15 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: 0x717198845570, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e 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+0x27 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x2c sys/arch/amd64/amd64/bus_space.c:654 comcnputc(800,2c) at comcnputc+0x1a7 sys/dev/ic/com.c:1270 cnputc(2c) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(2c) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20fc sys/kern/subr_prf.c:1064 db_printf(ffffffff8297684d) at db_printf+0x89 sys/kern/subr_prf.c:498 fault(ffffffff82918a25) at fault+0x95 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a1ddef0,7f87531a5248) at kpageflttrap+0x29f sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a1ddef0) at kerntrap+0xf3 sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pmap_page_remove(fffffd800795ee20) at pmap_page_remove+0x334 _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd800795ee20) at pmap_page_remove+0x334 sys/arch/amd64/amd64/pmap.c:1990 end trace frame: 0xffff80002a1de060, count: 0 ddb{1}> trace x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e 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+0x27 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x2c sys/arch/amd64/amd64/bus_space.c:654 comcnputc(800,2c) at comcnputc+0x1a7 sys/dev/ic/com.c:1270 cnputc(2c) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(2c) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20fc sys/kern/subr_prf.c:1064 db_printf(ffffffff8297684d) at db_printf+0x89 sys/kern/subr_prf.c:498 fault(ffffffff82918a25) at fault+0x95 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a1ddef0,7f87531a5248) at kpageflttrap+0x29f sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a1ddef0) at kerntrap+0xf3 sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pmap_page_remove(fffffd800795ee20) at pmap_page_remove+0x334 _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd800795ee20) at pmap_page_remove+0x334 sys/arch/amd64/amd64/pmap.c:1990 uvm_anfree_list(fffffd80681bee58,ffff80002a1de078) at uvm_anfree_list+0x98 amap_wipeout(fffffd806d2a5bf0) at amap_wipeout+0x1c1 sys/uvm/uvm_amap.c:504 uvm_unmap_detach(ffff80002a1de150,0) at uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1366 sys_munmap(ffff80002a18cd50,ffff80002a1de290,ffff80002a1de1e0) at sys_munmap+0x22e sys/uvm/uvm_mmap.c:539 syscall(ffff80002a1de290) at syscall+0x5ae mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff80002a1de290) at syscall+0x5ae sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c683f84c980, count: -20