*cpu0: uvm_fault(0xffffffff8398e210, 0xffff80000151908a, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76c102bfdb10, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000334b0650 rbx 0 rdx 0 rcx 0xffff80003c50c548 rax 0x2a r8 0xffff8000334b0580 r9 0x4 r10 0x3f25f0f87dc17ae5 r11 0x6dc3c952fe98970e r12 0 r13 0 r14 0 r15 0 rip 0xffffffff827d94c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff8000334b05d0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=331354 pid=13714 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=0xffff80003c50dc58,0xffffffff838e0d50 process=0xffff80003a0da978 user=0xffff8000334ab000, vmspace=0xfffffd8069116030 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *13714 331354 25906 0 7 0 syz-executor 5649 100592 81411 0 2 0x40 syz-executor 36672 142630 20609 0 2 0 syz-executor 36672 111260 20609 0 3 0x4000080 kqsel syz-executor 53322 312888 13990 0 2 0 syz-executor 53322 69902 13990 0 3 0x4000080 fsleep syz-executor 92327 141789 66777 0 2 0 syz-executor 92327 160459 66777 0 3 0x4000080 kqread syz-executor 92327 470374 66777 0 2 0x4000000 syz-executor 38353 445593 24005 0 2 0 syz-executor 38353 370601 24005 0 7 0x4000000 syz-executor 38353 111333 24005 0 3 0x4000080 fsleep syz-executor 38353 40606 24005 0 3 0x4000080 fsleep syz-executor 61383 116371 75890 0 2 0 syz-executor 61383 95452 75890 0 3 0x4000080 fsleep syz-executor 81411 282996 80971 0 3 0x82 ppwait syz-executor 18587 151953 1 0 3 0x100083 ttyin getty 29152 314458 0 0 3 0x14200 bored sosplice 13990 144973 80971 0 3 0x82 nanoslp syz-executor 20609 477262 80971 0 3 0x82 nanoslp syz-executor 75890 67833 80971 0 2 0x482 syz-executor 25906 7876 80971 0 3 0x82 nanoslp syz-executor 24005 417034 80971 0 3 0x82 nanoslp syz-executor 5134 122387 80971 0 3 0x82 wait syz-executor 66777 97759 80971 0 2 0x482 syz-executor 80971 397674 52014 0 3 0x82 kqread syz-executor 52014 295373 20485 0 3 0x10008a sigsusp ksh 20485 97779 37806 0 3 0x98 kqread sshd-session 37806 384115 4401 0 3 0x92 kqread sshd-session 4401 485641 1 0 3 0x88 kqread sshd 9670 405090 26752 74 3 0x1100092 bpf pflogd 26752 503774 1 0 3 0x80 sbwait pflogd 44142 455597 5463 73 3 0x1100090 kqread syslogd 5463 475299 1 0 3 0x100082 sbwait syslogd 82932 424127 1 0 3 0x100080 kqread resolvd 72772 171116 18035 77 3 0x100092 kqread dhcpleased 98274 299464 18035 77 3 0x100092 kqread dhcpleased 18035 79385 1 0 3 0x80 kqread dhcpleased 74668 172863 0 0 2 0x14200 smr 90979 291506 0 0 2 0x14200 zerothread 17509 29664 0 0 3 0x14200 aiodoned aiodoned 57812 66701 0 0 3 0x14200 syncer update 2779 432457 0 0 3 0x14200 cleaner cleaner 74526 102734 0 0 3 0x14200 reaper reaper 33698 15558 0 0 3 0x14200 pgdaemon pagedaemon 66399 381217 0 0 3 0x14200 bored viomb 25485 44163 0 0 3 0x40014200 acpi0 acpi0 83962 482331 0 0 3 0x40014200 idle1 16411 303356 0 0 3 0x14200 bored softnet3 12708 248334 0 0 3 0x14200 bored softnet2 64512 252572 0 0 3 0x14200 bored softnet1 68770 479389 0 0 3 0x14200 bored softnet0 504 396197 0 0 2 0x14200 systqmp 79552 237927 0 0 3 0x14200 bored systq 98186 415782 0 0 3 0x14200 tmoslp softclockmp 95367 215997 0 0 2 0x40014200 softclock 97363 106821 0 0 3 0x40014200 idle0 1 493800 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 (0xfffffd8079e467e0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_lower_lookup+0x3d6 #5 uvm_fault_lower+0x86 sys/uvm/uvm_fault.c:1312 #6 uvm_fault+0x272 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 13714 (syz-executor) thread 0xffff80003c50c548 (331354) Process 38353 (syz-executor) thread 0xffff8000ffff67d0 (370601) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10202 11102K 11598K 166960K 12512 0 pcb 17 14K 16K 166960K 321 0 rtable 180 8K 9K 166960K 465 0 pf 37 18K 22K 166960K 103 0 ifaddr 35 5K 8K 166960K 72 0 ifgroup 55 2K 2K 166960K 111 0 sysctl 3 1K 2K 166960K 5 0 counters 64 36K 36K 166960K 108 0 ioctlops 0 0K 4K 166960K 1592 0 iov 0 0K 16K 166960K 44 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1430 90K 90K 166960K 2081 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 23 11K 13K 166960K 38 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 830 0 sigio 0 0K 0K 166960K 13 0 proc 73 103K 128K 166960K 680 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 84 0 in_multi 67 5K 7K 166960K 139 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 465 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 217 72K 86K 166960K 9262 0 UVM aobj 80 3K 3K 166960K 82 0 pinsyscall 43 86K 102K 166960K 1927 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 28 0 NDP 12 0K 1K 166960K 43 0 temp 56 8682K 8756K 166960K 14403 0 kqueue 15 24K 34K 166960K 169 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 120 219 0 215 3 2 1 3 0 8 0 rtentry 160 135 0 60 5 0 5 5 0 8 0 unpcb 144 785 0 768 6 2 4 6 0 8 3 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 808 232 0 228 7 3 4 5 0 8 3 arp 120 21 0 7 1 0 1 1 0 8 0 inpcb 376 975 0 967 9 3 6 9 0 8 4 nd6 136 25 0 9 1 0 1 1 0 8 0 pkpcb 40 7 0 7 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1168 12 0 12 1 0 1 1 0 8 1 pppxif 1480 5 0 5 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 7 0 3 1 0 1 1 0 482 0 pffrnode 88 7 0 3 1 0 1 1 0 8 0 pffrent 40 17 0 13 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 0 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 72 0 21 1 0 1 1 0 8 0 pfstkey 128 78 0 27 2 0 2 2 0 8 0 pfstate 376 73 0 23 6 0 6 6 0 8 0 pfrule 1344 62 0 52 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 545 0 254 29 5 24 29 0 8 0 art_table 32 548 0 254 4 0 4 4 0 8 0 art_node 16 130 0 62 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 6 1 0 1 1 0 8 1 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 29 0 8 1 0 1 1 0 8 0 shmpl 112 79 0 2 3 0 3 3 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2891 0 1390 95 0 95 95 0 8 0 ffsino 280 2891 0 1390 109 0 109 109 0 8 0 nchpl 144 4063 0 2371 63 0 63 63 0 8 0 uvmvnodes 80 3406 0 0 70 0 70 70 0 8 0 vnodes 216 3406 0 0 190 0 190 190 0 8 0 namei 1024 14262 0 14262 3 1 2 2 0 8 2 percpumem 16 68 0 22 1 0 1 1 0 8 0 kstatmem 264 54 0 30 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 12727 0 12727 11 4 7 8 1 8 7 plimitpl 152 142 0 125 1 0 1 1 0 8 0 sigapl 424 1122 0 1071 7 1 6 7 0 8 0 futexpl 64 10560 0 10556 1 0 1 1 0 8 0 knotepl 120 558 0 0 17 0 17 17 0 8 0 kqueuepl 216 311 0 298 5 0 5 5 0 8 4 pipepl 328 164 0 136 3 0 3 3 0 8 0 fdescpl 504 1103 0 1071 5 0 5 5 0 8 0 filepl 152 7155 0 6933 21 9 12 21 0 8 2 lockfpl 104 250 0 247 1 0 1 1 0 8 0 lockfspl 48 96 0 93 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 44 0 27 1 0 1 1 0 8 0 ucredpl 104 1032 0 1018 1 0 1 1 0 8 0 zombiepl 144 1072 0 1071 1 0 1 1 0 8 0 processpl 1176 1122 0 1071 5 0 5 5 0 8 0 procpl 656 2328 0 2269 7 1 6 7 0 8 0 srpgc 96 7 0 7 2 2 0 1 0 8 0 sosppl 168 7 0 7 1 1 0 1 0 8 0 sockpl 688 1996 0 1967 33 24 9 28 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 98 0 0 3 0 3 3 0 8 0 mbufpl 256 515 0 0 33 0 33 33 0 8 0 bufpl 280 3922 0 130 271 0 271 271 0 8 0 anonpl 24 162820 0 159459 47 13 34 46 0 184 6 amapchunkpl 152 29767 0 29298 29 2 27 27 0 158 6 amappl16 200 3105 0 3071 16 11 5 15 0 8 1 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 114 0 102 1 0 1 1 0 8 0 amappl13 176 29 0 29 2 1 1 1 0 8 1 amappl12 168 1790 0 1759 4 2 2 3 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 242 0 242 1 1 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 108 0 96 1 0 1 1 0 8 0 amappl6 120 203 0 198 1 0 1 1 0 8 0 amappl5 112 136 0 125 1 0 1 1 0 8 0 amappl4 104 351 0 332 1 0 1 1 0 8 0 amappl3 96 5912 0 5803 4 0 4 4 0 8 0 amappl2 88 660 0 597 2 0 2 2 0 8 0 amappl1 80 10035 0 9472 16 2 14 15 0 8 0 amappl 88 8847 0 8685 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 81 0 2 2 0 2 2 0 8 0 uaddrrnd 24 1103 0 1071 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1103 0 1071 1 0 1 1 0 8 0 vmmpekpl 168 10404 0 10357 3 0 3 3 0 8 0 vmmpepl 168 72152 0 70263 94 7 87 94 0 357 1 vmsppl 456 1102 0 1071 7 2 5 5 0 8 0 rwobjpl 64 24569 0 20163 73 0 73 73 0 8 0 pdppl 4096 2214 0 2142 102 28 74 84 0 8 2 pvpl 32 14827 0 0 120 0 120 120 0 265 0 pmappl 248 1102 0 1071 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 308 0 41 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83799ff0) 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(800,38) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,38) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(38) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(38) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833e1faa) at db_printf+0x9b fault(ffffffff8337fe09) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff8000334a59f0,ffff80000151908a) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff8000334a59f0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b arp_rtrequest(ffff800000039058,1,fffffd806b15ad28) at arp_rtrequest+0x66a arprequest sys/netinet/if_ether.c:281 [inline] arp_rtrequest(ffff800000039058,1,fffffd806b15ad28) at arp_rtrequest+0x66a sys/netinet/if_ether.c:184 end trace frame: 0xffff8000334a5c20, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83799ff0) 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(800,38) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,38) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(38) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(38) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833e1faa) at db_printf+0x9b fault(ffffffff8337fe09) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff8000334a59f0,ffff80000151908a) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff8000334a59f0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b arp_rtrequest(ffff800000039058,1,fffffd806b15ad28) at arp_rtrequest+0x66a arprequest sys/netinet/if_ether.c:281 [inline] arp_rtrequest(ffff800000039058,1,fffffd806b15ad28) at arp_rtrequest+0x66a sys/netinet/if_ether.c:184 rtrequest(1,ffff8000334a5cd0,0,ffff8000334a5c50,0) at rtrequest+0xc5c sys/net/route.c:1115 rtm_output(ffff8000014b9f00,ffff8000334a5d78,ffff8000334a5cd0,0,0) at rtm_output+0x877 sys/net/rtsock.c:973 route_output(fffffd8069150f00,ffff8000014a3bc0) at route_output+0x9a1 sys/net/rtsock.c:878 route_send(ffff8000014a3bc0,fffffd8069150f00,0,0) at route_send+0xd7 sys/net/rtsock.c:342 sosend(ffff8000014a3bc0,0,ffff8000334a5f18,0,0,802) at sosend+0x804 sendit(ffff8000ffff67d0,3,ffff8000334a6010,802,ffff8000334a60c0) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff8000ffff67d0,ffff8000334a6170,ffff8000334a60c0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff8000334a6170) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000334a6170) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe1071c38530, count: -23 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76c102bfdb10, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x76c102bfdb10, count: -1