panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 951 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 354074 31382 0 0x10 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83469f78) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83413403,ffffffff8341bd5d,3b7,ffffffff8341bde0) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80002a3be358,ffffffff8335816d) at refcnt_finalize+0x1db sys/kern/kern_synch.c:952 pppx_if_destroy(205b9a,ffff80002a3be350) at pppx_if_destroy+0x3d sys/net/if_pppx.c:806 pppxclose(205b9a,1,2000,ffff80003c436a68) at pppxclose+0xa0 sys/net/if_pppx.c:553 spec_close(ffff80002a3a4610) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80644026e0,1,fffffd80097fb618,ffff80003c436a68) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c145cc0,ffff80003c436a68) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c145cc0,ffff80003c436a68) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c145cc0,ffff80003c436a68) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c145cc0,ffff80003c436a68) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c436a68) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c436a68,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c436a68,ffff80002a3a4980,ffff80002a3a48d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80002a3a4970, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 951 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83469f78) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83413403,ffffffff8341bd5d,3b7,ffffffff8341bde0) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80002a3be358,ffffffff8335816d) at refcnt_finalize+0x1db sys/kern/kern_synch.c:952 pppx_if_destroy(205b9a,ffff80002a3be350) at pppx_if_destroy+0x3d sys/net/if_pppx.c:806 pppxclose(205b9a,1,2000,ffff80003c436a68) at pppxclose+0xa0 sys/net/if_pppx.c:553 spec_close(ffff80002a3a4610) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80644026e0,1,fffffd80097fb618,ffff80003c436a68) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c145cc0,ffff80003c436a68) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c145cc0,ffff80003c436a68) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c145cc0,ffff80003c436a68) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c145cc0,ffff80003c436a68) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c436a68) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c436a68,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c436a68,ffff80002a3a4980,ffff80002a3a48d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3a4980) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a4980) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c998b2e9c40, count: -16 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a3a43e0 rbx 0xffffffff83881dd7 cpu_info_full_primary+0x2dd7 rdx 0 rcx 0xffff80003c436a68 rax 0xffffffff83880ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb5339c5d0faed8c2 r11 0xc880f5a461f5e62e r12 0xffffffff83881bd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff8214a265 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a3a43d0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=198193 pid=95471 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c436a68 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c437738,0xffff8000388099e8 process=0xffff8000fffee6d8 user=0xffff80002a39f000, vmspace=0xfffffd806ef1d788 estcpu=36, cpticks=4, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 31382 354074 58720 0 7 0x10 syz-executor 31382 136274 58720 0 2 0x4000010 syz-executor 79569 210753 82766 0 2 0 syz-executor 79569 479671 82766 0 3 0x4000000 smrbar syz-executor 56452 320941 7064 0 2 0 syz-executor 56452 278633 7064 0 3 0x4000080 sbwait syz-executor 56452 501812 7064 0 3 0x4000080 sbufrcv syz-executor 56452 88082 7064 0 3 0x4000080 sbufrcv syz-executor 43162 261332 25521 0 2 0 syz-executor 43162 328176 25521 0 3 0x4000080 fsleep syz-executor 43162 53394 25521 0 3 0x4000080 wsevent_read syz-executor 43162 159651 25521 0 3 0x4000080 fsleep syz-executor 32874 256517 41562 0 2 0 syz-executor 32874 320390 41562 0 3 0x4000080 nanoslp syz-executor 32874 4216 41562 0 3 0x4000080 kqsel syz-executor 32874 34129 41562 0 3 0x4000080 fifor syz-executor 32874 255089 41562 0 3 0x4000080 fifor syz-executor 32874 297127 41562 0 3 0x4000080 fsleep syz-executor 69869 300950 47530 60929 3 0x90 nanoslp syz-executor 69869 512320 47530 60929 3 0x4000090 fifor syz-executor 69869 177339 47530 60929 3 0x4000090 fsleep syz-executor 47530 34437 84876 0 3 0x82 nanoslp syz-executor 76156 128024 1 0 3 0x80 nanoslp init 25521 4183 84876 0 2 0x2 syz-executor 96758 378379 0 0 3 0x14200 acct acct 73627 520140 84876 0 2 0x2 syz-executor 53867 388229 0 0 3 0x14280 nfsidl nfsio 90146 253222 0 0 3 0x14280 nfsidl nfsio 90462 325467 0 0 3 0x14280 nfsidl nfsio 98814 370861 0 0 3 0x14280 nfsidl nfsio 22173 226967 0 0 3 0x14280 nfsidl nfsio 62469 30646 0 0 3 0x14280 nfsidl nfsio 82819 506383 0 0 3 0x14280 nfsidl nfsio 26829 148695 0 0 3 0x14280 nfsidl nfsio 25535 407435 0 0 3 0x14280 nfsidl nfsio 30987 262397 0 0 3 0x14280 nfsidl nfsio 34818 322091 0 0 3 0x14280 nfsidl nfsio 97477 321657 0 0 3 0x14280 nfsidl nfsio 67855 77017 0 0 3 0x14280 nfsidl nfsio 17682 42014 0 0 3 0x14280 nfsidl nfsio 74195 228017 0 0 3 0x14280 nfsidl nfsio 52678 58520 0 0 3 0x14280 nfsidl nfsio 51830 181481 0 0 3 0x14280 nfsidl nfsio 34035 325415 0 0 3 0x14280 nfsidl nfsio 74713 122166 0 0 3 0x14280 nfsidl nfsio 23587 344103 0 0 3 0x14280 nfsidl nfsio 78808 280619 0 0 3 0x14200 bored sosplice 11864 37959 84876 0 3 0x82 nanoslp syz-executor 58720 146539 84876 0 3 0x82 nanoslp syz-executor 82766 126113 84876 0 3 0x82 nanoslp syz-executor 41562 293188 84876 0 3 0x82 nanoslp syz-executor 7064 416765 84876 0 3 0x82 nanoslp syz-executor 84876 421026 77065 0 3 0x82 kqread syz-executor 77065 228625 57084 0 3 0x10008a sigsusp ksh 57084 170356 19469 0 3 0x98 kqread sshd-session 19469 195284 27065 0 3 0x92 kqread sshd-session 27065 197254 1 0 3 0x88 kqread sshd 59330 339070 1760 74 3 0x1100092 bpf pflogd 1760 7440 1 0 3 0x80 sbwait pflogd 21518 436880 91960 73 3 0x1100090 kqread syslogd 91960 450044 1 0 3 0x100082 sbwait syslogd 17101 224462 1 0 3 0x100080 kqread resolvd 6763 373951 73876 77 3 0x100092 kqread dhcpleased 33000 156387 73876 77 3 0x100092 kqread dhcpleased 73876 56906 1 0 3 0x80 kqread dhcpleased 3941 183937 0 0 3 0x14200 bored smr 14611 189361 0 0 2 0x14200 zerothread 2649 294240 0 0 3 0x14200 aiodoned aiodoned 37745 347073 0 0 3 0x14200 syncer update 7358 108408 0 0 3 0x14200 cleaner cleaner 80874 228359 0 0 3 0x14200 reaper reaper 27891 346985 0 0 3 0x14200 pgdaemon pagedaemon 20893 239916 0 0 3 0x14200 bored viomb 66716 412593 0 0 3 0x40014200 acpi0 acpi0 52397 404940 0 0 3 0x40014200 idle1 72251 350965 0 0 3 0x14200 bored softnet3 95739 219932 0 0 3 0x14200 bored softnet2 23467 424564 0 0 3 0x14200 bored softnet1 75562 24659 0 0 3 0x14200 bored softnet0 48780 78692 0 0 3 0x14200 bored systqmp 55304 404849 0 0 3 0x14200 bored systq 36278 455737 0 0 3 0x14200 tmoslp softclockmp 65410 59852 0 0 3 0x40014200 tmoslp softclock 94907 485211 0 0 3 0x40014200 idle0 1 39493 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 56452 (syz-executor) thread 0xffff80003c4367d8 (278633) exclusive rwlock sbufrcv r = 0 (0xffff80000158ec50) #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+0x377 sys/kern/kern_rwlock.c:310 #2 sblock+0xb7 sys/kern/uipc_socket2.c:536 #3 soreceive+0x28e sys/kern/uipc_socket.c:881 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #5 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:963 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 Process 73627 (syz-executor) thread 0xffff80003c436028 (520140) exclusive rrwlock inode r = 0 (0xfffffd806e37f778) #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+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #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 (0xfffffd806c420b00) #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+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10234 11059K 12590K 166960K 13538 0 pcb 19 14K 16K 166960K 290 0 rtable 191 8K 8K 166960K 593 0 pf 46 19K 67485K 166960K 124 0 ifaddr 43 7K 7K 166960K 95 0 ifgroup 76 3K 3K 166960K 153 0 sysctl 4 1K 9K 166960K 12 0 counters 80 38K 38K 166960K 152 0 ioctlops 0 0K 4K 166960K 1616 0 iov 2 20K 24K 166960K 174 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1469 92K 93K 166960K 2747 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 114 0 dirhash 15 2K 3K 166960K 51 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 1154 0 sigio 0 0K 0K 166960K 24 0 proc 64 79K 140K 166960K 705 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 270 0 in_multi 71 5K 7K 166960K 178 0 ether_multi 1 0K 0K 166960K 17 0 mrt 2 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 139 625K 625K 166960K 139 0 exec 0 0K 1K 166960K 676 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 243 155K 169K 166960K 12028 0 UVM aobj 30 2K 2K 166960K 34 0 pinsyscall 41 82K 102K 166960K 2335 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 153 0 NDP 16 0K 2K 166960K 62 0 temp 78 8695K 8773K 166960K 38410 0 kqueue 15 22K 28K 166960K 228 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 101 0 98 1 0 1 1 0 8 0 rtentry 176 187 0 106 6 1 5 6 0 8 0 unpcb 144 669 0 643 5 3 2 4 0 8 0 syncache 336 7 0 7 3 2 1 1 0 8 1 tcpcb 736 313 0 307 8 4 4 4 0 8 3 arp 128 29 0 11 1 0 1 1 0 8 0 inpcb 328 1290 0 1276 14 9 5 8 0 8 3 nd6 144 38 0 23 1 0 1 1 0 8 0 pkpcb 40 13 0 13 3 2 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 29 0 26 2 1 1 1 0 8 0 pppxif 1504 5 0 3 3 2 1 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 6 0 2 2 1 1 1 0 482 0 pffrnode 88 5 0 2 2 1 1 1 0 8 0 pffrent 40 12 0 8 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 0 5 5 0 8 5 pfosfpen 112 1428 0 1428 21 0 21 21 0 8 21 pfrktable 1344 2 0 2 2 1 1 1 0 8 1 pfstitem 24 81 0 22 1 0 1 1 0 8 0 pfstkey 128 82 0 23 2 0 2 2 0 8 0 pfstate 384 82 0 23 6 0 6 6 0 8 0 pfrule 1344 28 0 19 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 752 0 426 29 5 24 29 0 8 1 art_table 32 756 0 426 4 0 4 4 0 8 0 art_node 16 176 0 105 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 12 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 111 0 101 1 0 1 1 0 8 0 shmpl 112 31 0 4 1 0 1 1 0 8 0 dirhash 1024 46 0 27 3 0 3 3 0 8 0 dino2pl 256 3510 0 1992 96 0 96 96 0 8 1 ffsino 288 3510 0 1992 109 0 109 109 0 8 0 nchpl 144 5043 0 3328 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 uvmvnodes 80 4541 0 0 93 0 93 93 0 8 0 vnodes 216 4541 0 0 253 0 253 253 0 8 0 namei 1024 18120 0 18119 3 2 1 2 0 8 0 percpumem 16 91 0 36 1 0 1 1 0 8 0 kstatmem 264 84 0 48 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 3 2 1 1 0 8 1 scxspl 216 21362 0 21362 11 9 2 8 1 8 2 plimitpl 152 196 0 179 1 0 1 1 0 8 0 sigapl 424 1477 0 1406 10 1 9 9 0 8 0 knotepl 120 537 0 0 17 0 17 17 0 8 0 kqueuepl 224 406 0 395 3 2 1 3 0 8 0 pipepl 336 182 0 155 3 0 3 3 0 8 0 fdescpl 520 1434 0 1403 3 0 3 3 0 8 0 filepl 160 8812 0 8582 22 7 15 15 0 8 4 lockfpl 104 548 0 546 2 1 1 2 0 8 0 lockfspl 48 252 0 250 1 0 1 1 0 8 0 sessionpl 144 30 0 22 1 0 1 1 0 8 0 pgrppl 48 60 0 44 1 0 1 1 0 8 0 ucredpl 104 1305 0 1289 1 0 1 1 0 8 0 zombiepl 144 1407 0 1406 1 0 1 1 0 8 0 processpl 1240 1477 0 1406 6 0 6 6 0 8 0 procpl 656 3134 0 3048 8 0 8 8 0 8 0 srpgc 96 8 0 8 2 2 0 1 0 8 0 sosppl 168 8 0 8 3 2 1 1 0 8 1 sockpl 728 2094 0 2051 23 15 8 16 0 8 3 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 135 0 0 17 0 17 17 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 14 0 0 1 0 1 1 0 8 0 mbufpl 256 1174 0 0 73 0 73 73 0 8 0 bufpl 280 8349 0 2207 439 0 439 439 0 8 0 anonpl 32 9096 0 0 74 0 74 74 0 246 0 amapchunkpl 152 38862 0 38344 35 8 27 28 0 158 6 amappl16 200 2528 0 2496 16 10 6 15 0 8 0 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 126 0 115 1 0 1 1 0 8 0 amappl13 176 2 0 2 1 1 0 1 0 8 0 amappl12 168 2124 0 2094 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 4 0 3 2 1 1 1 0 8 0 amappl9 144 263 0 262 1 0 1 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 114 0 102 1 0 1 1 0 8 0 amappl6 120 211 0 208 1 0 1 1 0 8 0 amappl5 112 146 0 135 1 0 1 1 0 8 0 amappl4 104 339 0 319 1 0 1 1 0 8 0 amappl3 96 7977 0 7860 5 1 4 4 0 8 0 amappl2 88 708 0 646 2 0 2 2 0 8 0 amappl1 80 13455 0 12881 15 0 15 15 0 8 0 amappl 88 11087 0 10911 5 0 5 5 0 92 0 dma8192 8192 65 0 65 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 dma2048 2048 2 0 2 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 7 0 7 2 1 1 1 0 8 1 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 33 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1434 0 1403 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1434 0 1403 1 0 1 1 0 8 0 vmmpekpl 168 12625 0 12575 3 0 3 3 0 8 0 vmmpepl 168 92776 0 90816 101 9 92 100 0 357 0 vmsppl 480 1433 0 1403 6 1 5 5 0 8 0 rwobjpl 72 28885 0 23399 100 0 100 100 0 8 0 pdppl 4096 2876 0 2806 112 40 72 84 0 8 2 pvpl 32 16185 0 0 131 0 131 131 0 265 0 pmappl 256 1433 0 1403 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 477 0 58 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83469f78) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83413403,ffffffff8341bd5d,3b7,ffffffff8341bde0) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80002a3be358,ffffffff8335816d) at refcnt_finalize+0x1db sys/kern/kern_synch.c:952 pppx_if_destroy(205b9a,ffff80002a3be350) at pppx_if_destroy+0x3d sys/net/if_pppx.c:806 pppxclose(205b9a,1,2000,ffff80003c436a68) at pppxclose+0xa0 sys/net/if_pppx.c:553 spec_close(ffff80002a3a4610) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80644026e0,1,fffffd80097fb618,ffff80003c436a68) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c145cc0,ffff80003c436a68) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c145cc0,ffff80003c436a68) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c145cc0,ffff80003c436a68) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c145cc0,ffff80003c436a68) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c436a68) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c436a68,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c436a68,ffff80002a3a4980,ffff80002a3a48d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3a4980) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3a4980) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c998b2e9c40, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 end of kernel end trace frame: 0x737eb253c540, count: 12 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 end of kernel end trace frame: 0x737eb253c540, count: -3