panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 995 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 366733 49289 0 0x2 0x1 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8345e72a) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8340ac48,ffffffff8340ba3b,3e3,ffffffff8340ba83) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c4534f0,ffffffff83352a1c) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:996 pppx_if_destroy(0,ffff80003c4534e8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:806 pppxclose(205b9a,1,2000,ffff80003c406030) at pppxclose+0xa0 sys/net/if_pppx.c:553 spec_close(ffff80002a2ffc00) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8062fada38,1,fffffd80097fb618,ffff80003c406030) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c1a4a40,ffff80003c406030) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c1a4a40,ffff80003c406030) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c1a4a40,ffff80003c406030) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c1a4a40,ffff80003c406030) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c406030) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c406030,b,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c406030,ffff80002a2fff70,ffff80002a2ffec0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80002a2fff60, count: 0 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 995 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8345e72a) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8340ac48,ffffffff8340ba3b,3e3,ffffffff8340ba83) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c4534f0,ffffffff83352a1c) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:996 pppx_if_destroy(0,ffff80003c4534e8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:806 pppxclose(205b9a,1,2000,ffff80003c406030) at pppxclose+0xa0 sys/net/if_pppx.c:553 spec_close(ffff80002a2ffc00) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8062fada38,1,fffffd80097fb618,ffff80003c406030) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c1a4a40,ffff80003c406030) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c1a4a40,ffff80003c406030) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c1a4a40,ffff80003c406030) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c1a4a40,ffff80003c406030) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c406030) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c406030,b,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c406030,ffff80002a2fff70,ffff80002a2ffec0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2fff70) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2fff70) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x710e27e0d330, count: -16 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a2ff9d0 rbx 0xffff8000299dedd7 rdx 0 rcx 0xffff80003c406030 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb2ff36fc5d73bcce r11 0xfca3339723697049 r12 0xffff8000299debd8 r13 0 r14 0 r15 0x1 rip 0xffffffff81ee7015 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a2ff9c0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=332416 pid=2381 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c406030 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000ffff19c8,0xffff8000ffff0038 process=0xffff80003c412f58 user=0xffff80002a2fb000, vmspace=0xfffffd806c06bd40 estcpu=36, cpticks=10, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 15043 298824 92380 0 3 0x80 nanoslp syz-executor 15043 397001 92380 0 2 0x4000000 syz-executor 15043 55547 92380 0 3 0x4000080 fsleep syz-executor 81884 209067 742 0 3 0x80 nanoslp syz-executor 81884 292017 742 0 3 0x4000080 fsleep syz-executor 81884 309520 742 0 3 0x4000080 ttyout syz-executor 34629 304489 80437 0 3 0x80 nanoslp syz-executor 34629 499146 80437 0 3 0x4000080 kqsel syz-executor 34629 421174 80437 0 3 0x4000080 kqread syz-executor 34629 189780 80437 0 3 0x4000080 fsleep syz-executor 40163 490727 49289 0 3 0x82 nanoslp syz-executor 7833 457214 49289 0 3 0x2 biowait syz-executor 42346 207297 0 0 3 0x14200 bored sosplice 742 212469 49289 0 3 0x82 nanoslp syz-executor 92380 76411 49289 0 3 0x82 nanoslp syz-executor 80437 395162 49289 0 3 0x82 nanoslp syz-executor 64270 302553 49289 0 3 0x82 nanoslp syz-executor 22961 386975 49289 0 3 0x2 biowait syz-executor 52122 270925 49289 0 2 0x2 syz-executor 49289 366733 53515 0 7 0x3 syz-executor 53515 243670 38547 0 3 0x10008a sigsusp ksh 38547 106714 55371 0 3 0x98 kqread sshd-session 55371 522183 15403 0 3 0x92 kqread sshd-session 71142 132341 1 0 3 0x100083 ttyin getty 15403 483136 1 0 3 0x88 kqread sshd 89831 74466 99727 74 3 0x1100092 bpf pflogd 99727 283296 1 0 3 0x80 sbwait pflogd 71905 205418 83507 73 3 0x1100090 kqread syslogd 83507 419125 1 0 3 0x100082 sbwait syslogd 51199 194347 1 0 3 0x100080 kqread resolvd 82741 154039 70907 77 2 0x100012 dhcpleased 56666 6566 70907 77 3 0x100092 kqread dhcpleased 70907 468723 1 0 3 0x80 kqread dhcpleased 75744 197305 0 0 3 0x14200 bored smr 12569 239376 0 0 3 0x14200 pgzero zerothread 97853 88476 0 0 3 0x14200 aiodoned aiodoned 76421 35601 0 0 3 0x14200 syncer update 87647 108983 0 0 3 0x14200 cleaner cleaner 38017 15995 0 0 3 0x14200 reaper reaper 66120 404845 0 0 3 0x14200 pgdaemon pagedaemon 91868 389742 0 0 3 0x14200 bored viomb 41607 469651 0 0 3 0x40014200 acpi0 acpi0 41879 40496 0 0 3 0x40014200 idle1 83969 79764 0 0 3 0x14200 bored softnet3 8613 306053 0 0 3 0x14200 bored softnet2 41082 429789 0 0 3 0x14200 bored softnet1 76470 432564 0 0 2 0x14200 softnet0 23547 392939 0 0 3 0x14200 bored systqmp 84764 506192 0 0 3 0x14200 bored systq 85479 47248 0 0 3 0x14200 tmoslp softclockmp 24800 72955 0 0 3 0x40014200 tmoslp softclock 3000 402732 0 0 3 0x40014200 idle0 1 168990 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 7833 (syz-executor) thread 0xffff8000ffff14a8 (457214) exclusive rrwlock inode r = 0 (0xfffffd806e378898) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1864 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e36f308) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1864 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 Process 22961 (syz-executor) thread 0xffff80002a2abc50 (386975) exclusive rrwlock inode r = 0 (0xfffffd806e374f60) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3109 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c930d38) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3094 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 Process 76470 (softnet0) thread 0xffff8000ffffe7b0 (432564) shared rwlock softnet0 r = 0 (0xffff80000002c078) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10223 11120K 11954K 166960K 12609 0 pcb 20 17K 19K 166960K 186 0 rtable 214 12K 13K 166960K 501 0 pf 37 18K 22K 166960K 114 0 ifaddr 42 7K 8K 166960K 90 0 ifgroup 59 2K 2K 166960K 134 0 sysctl 3 1K 9K 166960K 9 0 counters 72 37K 37K 166960K 152 0 ioctlops 0 0K 4K 166960K 1586 0 iov 0 0K 28K 166960K 55 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1525 96K 96K 166960K 2397 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 30 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 236K 166960K 938 0 sigio 1 0K 0K 166960K 13 0 proc 72 91K 128K 166960K 661 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 244 0 in_multi 89 6K 7K 166960K 161 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 523 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 235 153K 168K 166960K 10077 0 UVM aobj 20 2K 2K 166960K 22 0 pinsyscall 40 80K 104K 166960K 2080 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 31 0 NDP 13 0K 2K 166960K 58 0 temp 57 8678K 8802K 166960K 39241 0 kqueue 16 26K 33K 166960K 188 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 236 0 233 3 2 1 3 0 8 0 rtentry 176 156 0 65 6 0 6 6 0 8 0 unpcb 144 743 0 726 4 0 4 4 0 8 3 syncache 336 9 0 9 1 1 0 1 0 8 0 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 808 195 0 190 3 1 2 2 0 8 1 arp 128 27 0 11 1 0 1 1 0 8 0 inpcb 384 1151 0 1137 16 6 10 15 0 8 8 nd6 144 33 0 9 1 0 1 1 0 8 0 pkpcb 40 44 0 44 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 31 0 30 1 0 1 1 0 8 0 pppxif 1504 6 0 5 2 1 1 1 0 8 0 pffrag 232 6 0 3 1 0 1 1 0 482 0 pffrnode 88 6 0 3 1 0 1 1 0 8 0 pffrent 40 13 0 10 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 1 1 0 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 67 0 11 1 0 1 1 0 8 0 pfstkey 128 73 0 17 2 0 2 2 0 8 0 pfstate 384 72 0 16 7 0 7 7 0 8 0 pfrule 1344 24 0 17 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 650 0 262 29 3 26 29 0 8 1 art_table 32 652 0 262 4 0 4 4 0 8 0 art_node 16 154 0 73 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 9 1 0 1 1 0 8 0 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 19 0 2 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3133 0 1624 96 0 96 96 0 8 0 ffsino 288 3133 0 1624 109 0 109 109 0 8 0 nchpl 144 4460 0 2764 64 0 64 64 0 8 0 rtmask 32 5 0 5 1 1 0 1 0 8 0 uvmvnodes 80 3849 0 0 79 0 79 79 0 8 0 vnodes 216 3849 0 0 214 0 214 214 0 8 0 namei 1024 15229 0 15228 2 1 1 2 0 8 0 percpumem 16 91 0 40 1 0 1 1 0 8 0 kstatmem 264 78 0 48 3 0 3 3 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 13605 0 13602 9 7 2 8 1 8 1 plimitpl 152 291 0 272 1 0 1 1 0 8 0 sigapl 424 1226 0 1178 8 2 6 7 0 8 0 knotepl 120 551 0 0 17 0 17 17 0 8 0 kqueuepl 224 393 0 379 5 0 5 5 0 8 3 pipepl 336 180 0 153 3 0 3 3 0 8 0 fdescpl 520 1206 0 1177 3 0 3 3 0 8 0 filepl 160 7972 0 7743 17 2 15 17 0 8 4 lockfpl 104 350 0 348 1 0 1 1 0 8 0 lockfspl 48 95 0 93 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 47 0 30 1 0 1 1 0 8 0 ucredpl 104 1216 0 1202 1 0 1 1 0 8 0 zombiepl 144 1180 0 1178 1 0 1 1 0 8 0 processpl 1208 1226 0 1178 6 1 5 5 0 8 0 procpl 656 2571 0 2516 7 1 6 6 0 8 0 srpgc 96 6 0 6 1 1 0 1 0 8 0 sosppl 168 5 0 5 2 1 1 1 0 8 1 sockpl 728 2220 0 2187 27 16 11 18 0 8 7 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 47 0 0 2 0 2 2 0 8 0 mbufpl 256 1155 0 0 73 0 73 73 0 8 0 bufpl 280 3901 0 127 270 0 270 270 0 8 0 anonpl 32 9614 0 0 78 0 78 78 0 246 0 amapchunkpl 152 32935 0 32459 31 1 30 31 0 158 8 amappl16 200 3730 0 3696 21 8 13 15 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 124 0 112 1 0 1 1 0 8 0 amappl13 176 5 0 4 1 0 1 1 0 8 0 amappl12 168 1886 0 1857 3 0 3 3 0 8 0 amappl11 160 64 0 50 1 0 1 1 0 8 0 amappl10 152 7 0 7 2 1 1 1 0 8 1 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 27 0 25 1 0 1 1 0 8 0 amappl7 128 119 0 106 1 0 1 1 0 8 0 amappl6 120 213 0 210 1 0 1 1 0 8 0 amappl5 112 126 0 116 1 0 1 1 0 8 0 amappl4 104 338 0 318 1 0 1 1 0 8 0 amappl3 96 6528 0 6418 4 0 4 4 0 8 0 amappl2 88 698 0 632 2 0 2 2 0 8 0 amappl1 80 12791 0 12188 15 0 15 15 0 8 0 amappl 88 9189 0 9028 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 8 0 8 2 1 1 1 0 8 1 dma128 128 254 0 254 2 2 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 21 0 20 1 0 1 1 0 8 0 aobjpl 72 21 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1206 0 1177 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1206 0 1177 1 0 1 1 0 8 0 vmmpekpl 168 11367 0 11316 3 0 3 3 0 8 0 vmmpepl 168 82148 0 80231 101 0 101 101 0 357 10 vmsppl 480 1205 0 1177 5 0 5 5 0 8 0 rwobjpl 72 27429 0 22613 89 0 89 89 0 8 0 pdppl 4096 2420 0 2354 106 34 72 86 0 8 6 pvpl 32 15952 0 0 130 1 129 129 0 265 0 pmappl 256 1205 0 1177 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 455 0 42 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f4ff0) 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 __mp_lock(ffffffff8395e770) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:128 [inline] __mp_lock(ffffffff8395e770) at __mp_lock+0x192 sys/kern/kern_lock.c:159 intr_handler(ffff80002a2e3fc0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff8395e770) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:128 [inline] __mp_lock(ffffffff8395e770) at __mp_lock+0x192 sys/kern/kern_lock.c:159 ktrgenio(ffff8000ffffc008,3,0,ffff800000b38a00,4) at ktrgenio+0x228 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrgenio(ffff8000ffffc008,3,0,ffff800000b38a00,4) at ktrgenio+0x228 sys/kern/kern_ktrace.c:264 dofilereadv(ffff8000ffffc008,3,ffff80002a2e4258,0,ffff80002a2e4310) at dofilereadv+0x42f sys/kern/sys_generic.c:268 sys_read(ffff8000ffffc008,ffff80002a2e43c0,ffff80002a2e4310) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80002a2e43c0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2e43c0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x723d63480a50, count: 3 ddb{0}> trace x86_ipi_db(ffffffff837f4ff0) 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 __mp_lock(ffffffff8395e770) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:128 [inline] __mp_lock(ffffffff8395e770) at __mp_lock+0x192 sys/kern/kern_lock.c:159 intr_handler(ffff80002a2e3fc0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff8395e770) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:128 [inline] __mp_lock(ffffffff8395e770) at __mp_lock+0x192 sys/kern/kern_lock.c:159 ktrgenio(ffff8000ffffc008,3,0,ffff800000b38a00,4) at ktrgenio+0x228 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrgenio(ffff8000ffffc008,3,0,ffff800000b38a00,4) at ktrgenio+0x228 sys/kern/kern_ktrace.c:264 dofilereadv(ffff8000ffffc008,3,ffff80002a2e4258,0,ffff80002a2e4310) at dofilereadv+0x42f sys/kern/sys_generic.c:268 sys_read(ffff8000ffffc008,ffff80002a2e43c0,ffff80002a2e4310) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80002a2e43c0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2e43c0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x723d63480a50, count: -12 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8345e72a) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8340ac48,ffffffff8340ba3b,3e3,ffffffff8340ba83) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c4534f0,ffffffff83352a1c) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:996 pppx_if_destroy(0,ffff80003c4534e8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:806 pppxclose(205b9a,1,2000,ffff80003c406030) at pppxclose+0xa0 sys/net/if_pppx.c:553 spec_close(ffff80002a2ffc00) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8062fada38,1,fffffd80097fb618,ffff80003c406030) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c1a4a40,ffff80003c406030) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c1a4a40,ffff80003c406030) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c1a4a40,ffff80003c406030) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c1a4a40,ffff80003c406030) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c406030) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c406030,b,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c406030,ffff80002a2fff70,ffff80002a2ffec0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80002a2fff60, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8345e72a) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8340ac48,ffffffff8340ba3b,3e3,ffffffff8340ba83) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c4534f0,ffffffff83352a1c) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:996 pppx_if_destroy(0,ffff80003c4534e8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:806 pppxclose(205b9a,1,2000,ffff80003c406030) at pppxclose+0xa0 sys/net/if_pppx.c:553 spec_close(ffff80002a2ffc00) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8062fada38,1,fffffd80097fb618,ffff80003c406030) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c1a4a40,ffff80003c406030) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c1a4a40,ffff80003c406030) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c1a4a40,ffff80003c406030) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c1a4a40,ffff80003c406030) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c406030) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c406030,b,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c406030,ffff80002a2fff70,ffff80002a2ffec0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2fff70) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2fff70) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x710e27e0d330, count: -16