*cpu1: uvm_fault(0xfffffd805fc21ba8, 0x0, 0, 1) -> e ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xc65bc400590, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c455a20 rbx 0 rdx 0xffff80000147e240 rcx 0xffff80003c457790 rax 0x32 r8 0xffff80003c455950 r9 0 r10 0xf76119a66467d186 r11 0xf58e4e90c7788859 r12 0 r13 0 r14 0xffff80003c457790 r15 0 rip 0xffffffff82d5d3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c4559a0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=476040 pid=86424 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c456a98,0xffffffff8392eaf8 process=0xffff80002a39ab78 user=0xffff80003c450000, vmspace=0xfffffd805fc21038 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86424 488269 78960 0 2 0 syz-executor *86424 476040 78960 0 7 0x4000000 syz-executor 85683 41593 22499 0 2 0x2 syz-executor 77234 246839 22499 0 2 0x2 syz-executor 57245 189127 0 0 3 0x14200 acct acct 89743 4626 22499 0 3 0x82 piperd syz-executor 47818 215003 1 0 3 0x100083 ttyin getty 80735 423160 22499 0 3 0x2 biowait syz-executor 13770 270057 0 0 3 0x14280 nfsidl nfsio 52645 406382 0 0 3 0x14280 nfsidl nfsio 61561 122104 0 0 3 0x14280 nfsidl nfsio 16850 184716 0 0 3 0x14280 nfsidl nfsio 61012 41857 22499 0 3 0x82 nanoslp syz-executor 64164 105745 22499 0 3 0x82 nanoslp syz-executor 78960 427650 22499 0 3 0x82 nanoslp syz-executor 9749 209385 22499 0 3 0x82 piperd syz-executor 22499 181143 40022 0 2 0x2 syz-executor 40022 472303 87284 0 3 0x10008a sigsusp ksh 87284 480867 51233 0 3 0x98 kqread sshd-session 51233 437682 99641 0 3 0x92 kqread sshd-session 99641 291716 1 0 3 0x88 kqread sshd 75947 330498 83890 74 3 0x1100092 bpf pflogd 83890 400706 1 0 3 0x80 sbwait pflogd 12006 70153 95072 73 3 0x1100090 kqread syslogd 95072 518694 1 0 3 0x100082 sbwait syslogd 26367 97155 1 0 3 0x100080 kqread resolvd 39099 378509 30718 77 3 0x100092 kqread dhcpleased 10556 129133 30718 77 3 0x100092 kqread dhcpleased 30718 53478 1 0 3 0x80 kqread dhcpleased 73331 103753 0 0 3 0x14200 bored smr 67381 183566 0 0 2 0x14200 zerothread 74438 328577 0 0 3 0x14200 aiodoned aiodoned 76691 226918 0 0 3 0x14200 syncer update 85365 481653 0 0 3 0x14200 cleaner cleaner 85639 172028 0 0 3 0x14200 reaper reaper 41868 408177 0 0 3 0x14200 pgdaemon pagedaemon 21611 278243 0 0 3 0x14200 bored viomb 68786 518477 0 0 3 0x40014200 acpi0 acpi0 18062 98417 0 0 3 0x40014200 idle1 91366 385042 0 0 3 0x14200 bored softnet1 508 61811 0 0 3 0x14200 bored softnet0 27092 446598 0 0 3 0x14200 bored systqmp 93377 244746 0 0 3 0x14200 bored systq 33322 147709 0 0 3 0x14200 tmoslp softclockmp 12468 67484 0 0 3 0x40014200 tmoslp softclock 1819 86656 0 0 3 0x40014200 idle0 1 381012 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex inpcb r = 0 (0xffffffff83908150) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pool_get+0x124 sys/kern/subr_pool.c:581 #4 in_pcballoc+0x6c sys/netinet/in_pcb.c:-1 #5 udp_attach+0xde sys/netinet/udp_usrreq.c:1135 #6 socreate+0x238 pru_attach sys/sys/protosw.h:275 [inline] #6 socreate+0x238 sys/kern/uipc_socket.c:220 #7 sys_socket+0x124 sys/kern/uipc_syscalls.c:102 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 86424 (syz-executor) thread 0xffff80003c457790 (476040) Process 85683 (syz-executor) thread 0xffff8000ffff27e0 (41593) Process 80735 (syz-executor) thread 0xffff80003c4034e8 (423160) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10247 11098K 12327K 166960K 14941 0 pcb 17 16K 18K 166960K 1006 0 rtable 201 13K 15K 166960K 1053 0 pf 31 17K 82K 166960K 445 0 ifaddr 29 6K 8K 166960K 269 0 ifgroup 47 2K 3K 166960K 526 0 sysctl 4 1K 9K 166960K 29 0 counters 66 36K 39K 166960K 600 0 ioctlops 0 0K 4K 166960K 2622 0 iov 0 0K 28K 166960K 236 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1502 94K 95K 166960K 4496 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 13K 166960K 46 0 VM map 2 1K 1K 166960K 2 0 sem 24 137K 137K 166960K 35 0 dirhash 12 2K 2K 166960K 57 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 13 45K 85K 166960K 3574 0 sigio 0 0K 0K 166960K 187 0 proc 74 115K 147K 166960K 1032 0 subproc 61 3K 4K 166960K 199 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 552 0 in_multi 47 3K 7K 166960K 281 0 ether_multi 1 0K 0K 166960K 29 0 mrt 1 0K 0K 166960K 22 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 271 1208K 1208K 166960K 271 0 exec 0 0K 1K 166960K 1467 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 216 150K 169K 166960K 34234 0 UVM aobj 86 25K 25K 166960K 99 0 pinsyscall 38 76K 99K 166960K 4939 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 293 0 NDP 10 0K 2K 166960K 216 0 temp 79 8679K 9196K 166960K 179955 0 kqueue 13 20K 30K 166960K 662 0 SYN cache 2 8K 16K 166960K 3 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 120 416 0 413 5 4 1 3 0 8 0 rtentry 176 303 0 237 7 2 5 6 0 8 0 unpcb 144 2312 0 2295 17 16 1 4 0 8 0 syncache 336 14 0 14 7 7 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 1083 0 1077 26 25 1 7 0 8 0 arp 136 45 0 33 1 0 1 1 0 8 0 inpcb 328 4122 0 4111 35 33 2 10 0 8 1 nd6 152 56 0 41 1 0 1 1 0 8 0 pkpcb 40 18 0 18 7 6 1 1 0 8 1 kcovpl 48 21 0 15 1 0 1 1 0 8 0 mppekey 1024 4 0 4 4 4 0 1 0 8 0 ppxss 1192 218 0 218 1 1 0 1 0 8 0 pppxif 1504 20 0 20 7 7 0 1 0 8 0 pffrag 232 22 0 21 1 0 1 1 0 482 0 pffrnode 88 17 0 16 1 0 1 1 0 8 0 pffrent 40 70 0 69 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 9 0 9 5 5 0 1 0 8 0 pfstitem 24 216 0 150 1 0 1 1 0 8 0 pfstkey 128 216 0 150 3 0 3 3 0 8 0 pfstate 448 216 0 150 10 0 10 10 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 7 0 1 7 1 6 6 0 8 0 art_heap4 256 1022 0 768 38 13 25 29 0 8 4 art_table 40 1029 0 769 5 0 5 5 0 8 0 art_node 32 269 0 213 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 28 0 6 1 0 1 1 0 8 0 shmpl 112 83 0 10 3 0 3 3 0 8 0 dirhash 1024 49 0 32 3 0 3 3 0 8 0 dino2pl 256 8252 0 6724 96 0 96 96 0 8 0 ffsino 296 8252 0 6724 119 1 118 118 0 8 0 nchpl 144 13269 0 12632 65 41 24 65 0 8 0 rtmask 32 44 0 44 6 6 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 47268 0 47267 3 2 1 2 0 8 0 percpumem 16 315 0 267 1 0 1 1 0 8 0 vcpupl 3968 12 0 2 2 0 2 2 0 8 0 vmpool 840 13 0 3 2 0 2 2 0 8 0 kstatmem 264 374 0 350 5 2 3 3 0 8 0 scsiplug 72 8 0 8 6 6 0 1 0 8 0 scxspl 216 76601 0 76600 13 12 1 5 1 8 0 plimitpl 152 1039 0 1021 1 0 1 1 0 8 0 sigapl 424 3881 0 3833 7 0 7 7 0 8 0 knotepl 120 612 0 0 17 0 17 17 0 8 0 kqueuepl 224 1672 0 1663 18 16 2 5 0 8 1 pipepl 344 697 0 669 9 6 3 6 0 8 0 fdescpl 528 3848 0 3821 3 0 3 3 0 8 0 filepl 160 27944 0 27729 44 30 14 18 0 8 2 lockfpl 104 1646 0 1644 4 3 1 2 0 8 0 lockfspl 48 509 0 507 1 0 1 1 0 8 0 sessionpl 144 47 0 38 1 0 1 1 0 8 0 pgrppl 48 219 0 202 1 0 1 1 0 8 0 ucredpl 104 4556 0 4543 1 0 1 1 0 8 0 zombiepl 144 4917 0 4915 1 0 1 1 0 8 0 processpl 1232 3881 0 3833 6 1 5 5 0 8 0 procpl 664 9827 0 9778 8 1 7 7 0 8 0 sosppl 176 26 0 26 8 8 0 1 0 8 0 sockpl 752 6948 0 6917 58 54 4 17 0 8 0 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 143 0 0 17 0 17 17 0 8 0 mcl2k 2048 116 0 0 13 4 9 13 0 8 1 mtagpl 96 68 0 0 2 0 2 2 0 8 0 mbufpl 256 1248 0 0 75 0 75 75 0 8 0 bufpl 280 29928 0 23791 439 0 439 439 0 8 0 anonpl 32 12488 0 0 100 0 100 100 0 246 0 amapchunkpl 152 121201 0 120788 68 37 31 35 0 158 6 amappl16 200 12374 0 12345 151 138 13 31 0 8 6 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 512 0 511 1 0 1 1 0 8 0 amappl12 168 4292 0 4253 6 3 3 3 0 8 0 amappl11 160 2 0 2 1 1 0 1 0 8 0 amappl10 152 51 0 36 1 0 1 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 112 0 111 1 0 1 1 0 8 0 amappl6 120 372 0 358 1 0 1 1 0 8 0 amappl5 112 84 0 72 1 0 1 1 0 8 0 amappl4 104 501 0 471 1 0 1 1 0 8 0 amappl3 96 21336 0 21260 3 0 3 3 0 8 0 amappl2 88 4020 0 3948 2 0 2 2 0 8 0 amappl1 80 26795 0 26222 14 0 14 14 0 8 0 amappl 88 32748 0 32608 6 1 5 5 0 92 0 uvmvnodes 80 185 0 0 4 0 4 4 0 8 0 dma65536 65536 2 0 2 2 2 0 1 0 8 0 dma4096 4096 3 0 3 3 3 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 258 0 258 5 5 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 98 0 13 2 0 2 2 0 8 0 uaddrrnd 24 3848 0 3821 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3848 0 3821 1 0 1 1 0 8 0 vmmpekpl 168 31164 0 31103 4 0 4 4 0 8 0 vmmpepl 168 248120 0 246409 156 52 104 111 0 357 9 vmsppl 488 3847 0 3821 8 3 5 5 0 8 0 rwobjpl 80 64070 0 62901 48 15 33 36 0 8 0 pdppl 4096 7729 0 7658 143 66 77 82 0 8 6 pvpl 32 21070 0 0 170 1 169 169 0 265 0 pmappl 256 3860 0 3824 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 458 0 130 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xc65bc400590, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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:670 comcnputc(800,6e) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,6e) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(6e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 db_printf(ffffffff8343c547) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80002a35e3b0) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80002a35e3b0) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80002a35e3b0) at kerntrap+0x242 sys/arch/amd64/amd64/trap.c:511 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000016d8000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000ffff3a08) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff3a08) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 end trace frame: 0xffff80002a35e550, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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:670 comcnputc(800,6e) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,6e) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(6e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 db_printf(ffffffff8343c547) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80002a35e3b0) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80002a35e3b0) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80002a35e3b0) at kerntrap+0x242 sys/arch/amd64/amd64/trap.c:511 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000016d8000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff8000ffff3a08) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff3a08) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a35e560) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807c1b27f8,81,fffffd80097fd548,ffff8000ffff3a08) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806f784508,ffff8000ffff3a08) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806f784508,ffff8000ffff3a08) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806f784508,ffff8000ffff3a08) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806f784508,ffff8000ffff3a08) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000ffff3a08) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffff3a08,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000ffff3a08,ffff80002a35e8d0,ffff80002a35e820) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a35e8d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a35e8d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b1217832280, count: -24