*cpu1: uvm_fault(0xffffffff838a8368, 0xffff80000154b00a, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x707f21122870, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800034ca48a0 rbx 0 rdx 0 rcx 0xffff80002a390018 rax 0x2a r8 0xffff800034ca47d0 r9 0 r10 0x1908b2968209844c r11 0x5364181bc5aab08f r12 0 r13 0xffffffff825cb248 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff82eb74c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800034ca4820 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=158460 pid=34351 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffefc58,0xffff80002a3914a8 process=0xffff80003c4f44c0 user=0xffff800034c9f000, vmspace=0xfffffd806e02a8f8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *34351 158460 47776 0 7 0 syz-executor 34351 409609 47776 0 7 0x4000000 syz-executor 17465 334326 80395 60929 2 0x10 syz-executor 17465 310653 80395 60929 3 0x4000090 ttyopn syz-executor 17465 427619 80395 60929 3 0x4000090 kqsel syz-executor 60222 226995 31581 0 3 0x80 nanoslp syz-executor 60222 266317 31581 0 3 0x4000080 netacc syz-executor 60222 61129 31581 0 3 0x4000080 fsleep syz-executor 40010 191928 66691 0 3 0x90 nanoslp syz-executor 40010 59679 66691 0 3 0x4000090 sbwait syz-executor 40010 429236 66691 0 3 0x4000090 fsleep syz-executor 40010 410371 66691 0 3 0x4000090 fsleep syz-executor 93358 346795 53473 0 2 0 syz-executor 93358 466326 53473 0 3 0x4000080 netacc syz-executor 93358 183805 53473 0 3 0x4000080 netacc syz-executor 93358 206151 53473 0 3 0x4000080 fsleep syz-executor 71111 269732 1 0 3 0x100083 ttyin getty 31581 398010 58972 0 3 0x82 nanoslp syz-executor 71900 209793 58972 0 3 0x82 wait syz-executor 43726 164571 0 0 3 0x14280 nfsidl nfsio 51249 246506 0 0 3 0x14280 nfsidl nfsio 98599 419719 0 0 3 0x14280 nfsidl nfsio 49248 179820 0 0 3 0x14280 nfsidl nfsio 2505 337319 0 0 3 0x14280 nfsidl nfsio 20232 437437 0 0 3 0x14280 nfsidl nfsio 35266 234467 0 0 3 0x14280 nfsidl nfsio 76585 437223 0 0 3 0x14280 nfsidl nfsio 74142 452664 0 0 3 0x14280 nfsidl nfsio 87072 322750 0 0 3 0x14280 nfsidl nfsio 50131 454049 0 0 3 0x14280 nfsidl nfsio 72332 430479 0 0 3 0x14280 nfsidl nfsio 49430 343441 0 0 3 0x14280 nfsidl nfsio 14378 392336 0 0 3 0x14280 nfsidl nfsio 74162 233663 0 0 3 0x14280 nfsidl nfsio 92736 414144 0 0 3 0x14280 nfsidl nfsio 34364 148103 0 0 3 0x14280 nfsidl nfsio 39498 51527 0 0 3 0x14280 nfsidl nfsio 32756 227609 0 0 3 0x14280 nfsidl nfsio 18533 289712 0 0 3 0x14280 nfsidl nfsio 67469 169803 0 0 3 0x14200 bored sosplice 53473 273751 58972 0 3 0x82 nanoslp syz-executor 47776 357358 58972 0 3 0x82 nanoslp syz-executor 94299 426330 58972 0 3 0x82 wait syz-executor 80395 461324 58972 0 3 0x82 nanoslp syz-executor 66691 75743 58972 0 3 0x82 nanoslp syz-executor 6683 284321 58972 0 3 0x82 wait syz-executor 58972 480007 7173 0 3 0x82 kqread syz-executor 7173 168430 58422 0 3 0x10008a sigsusp ksh 58422 142739 53028 0 3 0x98 kqread sshd-session 53028 219921 12152 0 3 0x92 kqread sshd-session 12152 331449 1 0 3 0x88 kqread sshd 83365 64038 21556 74 3 0x1100092 bpf pflogd 21556 44836 1 0 3 0x80 sbwait pflogd 41975 62048 35821 73 3 0x1100090 kqread syslogd 35821 351385 1 0 3 0x100082 sbwait syslogd 41829 400433 1 0 3 0x100080 kqread resolvd 69375 108584 87450 77 3 0x100092 kqread dhcpleased 48125 290664 87450 77 3 0x100092 kqread dhcpleased 87450 248927 1 0 3 0x80 kqread dhcpleased 18438 414305 0 0 3 0x14200 bored smr 57604 217429 0 0 3 0x14200 pgzero zerothread 49409 484583 0 0 3 0x14200 aiodoned aiodoned 48574 24559 0 0 3 0x14200 syncer update 14499 139349 0 0 3 0x14200 cleaner cleaner 68585 193792 0 0 3 0x14200 reaper reaper 93481 120951 0 0 3 0x14200 pgdaemon pagedaemon 96645 42739 0 0 3 0x14200 bored viomb 48417 172321 0 0 3 0x40014200 acpi0 acpi0 55954 133188 0 0 3 0x40014200 idle1 27395 293929 0 0 3 0x14200 bored softnet3 90788 321321 0 0 3 0x14200 bored softnet2 48063 336511 0 0 3 0x14200 bored softnet1 25501 202311 0 0 3 0x14200 bored softnet0 5219 57401 0 0 3 0x14200 bored systqmp 12604 334072 0 0 3 0x14200 bored systq 15996 479834 0 0 3 0x14200 tmoslp softclockmp 25465 160962 0 0 3 0x40014200 tmoslp softclock 26420 42206 0 0 3 0x40014200 idle0 1 221946 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff839ecf68) #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 sleep_finish+0x157 sys/kern/kern_synch.c:396 #4 msleep+0x13b sys/kern/kern_synch.c:249 #5 taskq_next_work+0x8e sys/kern/kern_task.c:399 #6 taskq_thread+0x1d5 sys/kern/kern_task.c:439 #7 proc_trampoline+0x10 Process 34351 (syz-executor) thread 0xffff80002a391498 (409609) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10227 11054K 11443K 166960K 14029 0 pcb 18 15K 16K 166960K 539 0 rtable 311 16K 16K 166960K 1287 0 pf 44 20K 28K 166960K 449 0 ifaddr 40 7K 9K 166960K 202 0 ifgroup 51 2K 2K 166960K 398 0 sysctl 4 1K 1K 166960K 8 0 counters 62 36K 37K 166960K 398 0 ioctlops 0 0K 5K 166960K 2003 0 iov 0 0K 20K 166960K 224 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1519 95K 96K 166960K 3312 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 52K 56K 166960K 36 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 258 0 dirhash 15 2K 3K 166960K 78 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 3108 0 sigio 1 0K 0K 166960K 92 0 proc 72 91K 140K 166960K 1007 0 subproc 72 4K 4K 166960K 91 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 247 0 in_multi 93 6K 7K 166960K 228 0 ether_multi 2 0K 0K 166960K 18 0 mrt 1 0K 0K 166960K 11 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 705 0 fusefs mount 1 32K 32K 166960K 1 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 261 74K 88K 166960K 30097 0 UVM aobj 116 3K 4K 166960K 126 0 pinsyscall 43 86K 107K 166960K 4297 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 253 0 NDP 11 0K 2K 166960K 133 0 temp 76 8644K 8753K 166960K 83950 0 kqueue 13 20K 33K 166960K 482 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 120 603 0 599 4 3 1 3 0 8 0 rtentry 112 276 0 145 4 0 4 4 0 8 0 unpcb 144 2120 0 2101 11 7 4 4 0 8 3 syncache 336 14 0 14 5 4 1 1 0 8 1 tcpqe 32 6 0 6 3 3 0 1 0 8 0 tcpcb 808 796 0 784 11 9 2 8 0 8 0 arp 120 65 0 13 2 0 2 2 0 8 0 inpcb 376 2209 0 2190 24 15 9 9 0 8 6 nd6 136 41 0 18 2 0 2 2 0 8 0 pkpcb 40 13 0 13 5 4 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1168 115 0 115 3 2 1 1 0 8 1 pppxif 1472 39 0 39 4 4 0 1 0 8 0 pfstscr 40 84 0 84 3 3 0 1 0 8 0 pffrag 232 132 0 83 3 0 3 3 0 482 0 pffrnode 88 69 0 26 1 0 1 1 0 8 0 pffrent 40 221 0 172 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 63 0 58 1 0 1 1 0 8 0 pfanchor 1288 10 0 9 2 1 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfqueue 320 2 0 0 1 0 1 1 0 8 0 pfstitem 24 172 0 64 1 0 1 1 0 8 0 pfstkey 128 249 0 142 4 0 4 4 0 8 0 pfstate 376 215 0 112 12 1 11 11 0 8 0 pfrule 1344 42 0 32 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 875 0 461 33 6 27 32 0 8 0 art_table 32 878 0 461 5 1 4 5 0 8 0 art_node 16 265 0 183 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 8 2 1 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 248 0 238 1 0 1 1 0 8 0 shmpl 112 123 0 10 4 0 4 4 0 8 0 dirhash 1024 61 0 42 3 0 3 3 0 8 0 dino2pl 256 6669 0 5163 95 0 95 95 0 8 0 ffsino 280 6669 0 5163 109 0 109 109 0 8 0 nchpl 144 10736 0 9043 64 0 64 64 0 8 0 rtmask 32 12 0 12 4 3 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 34409 0 34409 4 3 1 2 0 8 1 percpumem 16 213 0 168 1 0 1 1 0 8 0 pfiaddrpl 120 22 0 18 2 1 1 1 0 8 0 kstatmem 264 220 0 198 6 4 2 3 0 8 0 scsiplug 72 6 0 6 3 3 0 1 0 8 0 scxspl 216 34941 0 34941 9 8 1 8 1 8 1 plimitpl 152 633 0 615 1 0 1 1 0 8 0 sigapl 424 3436 0 3365 10 1 9 9 0 8 0 futexpl 64 36655 0 36651 1 0 1 1 0 8 0 knotepl 120 572 0 0 18 0 18 18 0 8 0 kqueuepl 216 1108 0 1098 10 8 2 5 0 8 1 pipepl 328 253 0 225 3 0 3 3 0 8 0 fdescpl 504 3391 0 3359 7 2 5 6 0 8 0 filepl 152 17674 0 17437 28 12 16 16 0 8 6 lockfpl 104 772 0 770 2 1 1 2 0 8 0 lockfspl 48 244 0 242 1 0 1 1 0 8 0 sessionpl 144 37 0 28 1 0 1 1 0 8 0 pgrppl 48 98 0 81 1 0 1 1 0 8 0 ucredpl 104 2871 0 2855 1 0 1 1 0 8 0 zombiepl 144 4189 0 4186 2 1 1 1 0 8 0 processpl 1176 3436 0 3365 6 0 6 6 0 8 0 procpl 656 7862 0 7780 9 1 8 8 0 8 0 srpgc 96 9 0 9 2 2 0 1 0 8 0 sosppl 168 8 0 8 5 4 1 1 0 8 1 sockpl 688 5050 0 5008 40 24 16 16 0 8 11 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 118 0 0 3 0 3 3 0 8 0 mbufpl 256 361 0 0 21 0 21 21 0 8 0 bufpl 280 10082 0 3928 440 0 440 440 0 8 0 anonpl 24 397664 0 389873 140 68 72 74 0 184 11 amapchunkpl 152 97864 0 97155 59 27 32 34 0 158 4 amappl16 200 7409 0 7233 69 47 22 27 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 136 0 124 1 0 1 1 0 8 0 amappl13 176 21 0 21 3 3 0 1 0 8 0 amappl12 168 4090 0 4058 4 2 2 3 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 30 0 27 1 0 1 1 0 8 0 amappl7 128 127 0 114 1 0 1 1 0 8 0 amappl6 120 202 0 199 1 0 1 1 0 8 0 amappl5 112 146 0 136 1 0 1 1 0 8 0 amappl4 104 371 0 352 1 0 1 1 0 8 0 amappl3 96 20878 0 20748 4 0 4 4 0 8 0 amappl2 88 790 0 728 2 0 2 2 0 8 0 amappl1 80 19627 0 19048 15 1 14 14 0 8 0 amappl 88 29533 0 29328 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 128 255 0 255 3 3 0 1 0 8 0 dma64 64 7 0 7 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 72 125 0 10 3 0 3 3 0 8 0 uaddrrnd 24 3391 0 3359 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3391 0 3359 1 0 1 1 0 8 0 vmmpekpl 168 26746 0 26690 3 0 3 3 0 8 0 vmmpepl 168 206855 0 204743 132 29 103 106 0 357 3 vmsppl 456 3390 0 3359 7 2 5 5 0 8 1 rwobjpl 64 56077 0 48912 125 5 120 120 0 8 1 pdppl 4096 6789 0 6718 125 52 73 87 0 8 2 pvpl 32 20918 0 0 169 0 169 169 0 265 0 pmappl 248 3390 0 3359 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 338 0 80 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: 0x707f21122870, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029a9bff0) 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(800,66) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,66) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(66) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(66) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833e1995) at db_printf+0x9b fault(ffffffff8337f3f9) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff8000384c2530,ffff80000154b00a) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff8000384c2530) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b arp_rtrequest(ffff800000039058,1,fffffd806bb1ba88) at arp_rtrequest+0x660 arprequest sys/netinet/if_ether.c:281 [inline] arp_rtrequest(ffff800000039058,1,fffffd806bb1ba88) at arp_rtrequest+0x660 sys/netinet/if_ether.c:184 end trace frame: 0xffff8000384c2760, count: 0 ddb{1}> trace x86_ipi_db(ffff800029a9bff0) 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(800,66) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,66) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(66) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(66) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833e1995) at db_printf+0x9b fault(ffffffff8337f3f9) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff8000384c2530,ffff80000154b00a) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff8000384c2530) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b arp_rtrequest(ffff800000039058,1,fffffd806bb1ba88) at arp_rtrequest+0x660 arprequest sys/netinet/if_ether.c:281 [inline] arp_rtrequest(ffff800000039058,1,fffffd806bb1ba88) at arp_rtrequest+0x660 sys/netinet/if_ether.c:184 rtrequest(1,ffff8000384c2810,0,ffff8000384c2790,0) at rtrequest+0xbec sys/net/route.c:1110 rtm_output(ffff8000014f5400,ffff8000384c28b8,ffff8000384c2810,0,0) at rtm_output+0x855 sys/net/rtsock.c:973 route_output(fffffd80715db000,ffff80000152ebe8) at route_output+0x9a1 sys/net/rtsock.c:878 route_send(ffff80000152ebe8,fffffd80715db000,0,0) at route_send+0xd7 sys/net/rtsock.c:342 sosend(ffff80000152ebe8,0,ffff8000384c2a58,0,0,802) at sosend+0x804 sendit(ffff80002a391498,3,ffff8000384c2b50,802,ffff8000384c2c00) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff80002a391498,ffff8000384c2cb0,ffff8000384c2c00) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff8000384c2cb0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000384c2cb0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f8672a2c0, count: -23