panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 955 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 12297 75029 0 0 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83451c58) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348ceed,ffffffff8349b4e7,3bb,ffffffff834c44a6) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003abc6348,ffffffff83445af9) at refcnt_finalize+0x1db sys/kern/kern_synch.c:956 pppx_if_destroy(285b9a,ffff80003abc6340) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(285b9a,41,2000,ffff800038bbd4e8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003abe54b0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80609d56e0,41,fffffd80097fd820,ffff800038bbd4e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806071ba50,ffff800038bbd4e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806071ba50,ffff800038bbd4e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806071ba50,ffff800038bbd4e8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806071ba50,ffff800038bbd4e8) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff800038bbd4e8) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff800038bbd4e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800038bbd4e8,ffff80003abe5820,ffff80003abe5770) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80003abe5810, 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 955 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83451c58) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348ceed,ffffffff8349b4e7,3bb,ffffffff834c44a6) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003abc6348,ffffffff83445af9) at refcnt_finalize+0x1db sys/kern/kern_synch.c:956 pppx_if_destroy(285b9a,ffff80003abc6340) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(285b9a,41,2000,ffff800038bbd4e8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003abe54b0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80609d56e0,41,fffffd80097fd820,ffff800038bbd4e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806071ba50,ffff800038bbd4e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806071ba50,ffff800038bbd4e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806071ba50,ffff800038bbd4e8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806071ba50,ffff800038bbd4e8) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff800038bbd4e8) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff800038bbd4e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800038bbd4e8,ffff80003abe5820,ffff80003abe5770) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003abe5820) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003abe5820) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72f900e1c450, count: -16 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003abe5280 rbx 0xffff8000299bee07 rdx 0 rcx 0xffff800038bbd4e8 rax 0xffff8000299bdff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe8ff7814968f7a71 r11 0x4c3008989fef159c r12 0xffff8000299bec08 r13 0 r14 0 r15 0x1 rip 0xffffffff81648fe5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003abe5270 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=247940 pid=64051 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=73, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff800038bbd4e8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffef240,0xffff800038bbda28 process=0xffff80003abf5360 user=0xffff80003abe0000, vmspace=0xfffffd806f5b71f0 estcpu=23, cpticks=4, pctcpu=0.1, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 26658 165383 25888 0 2 0 syz-executor 26658 442371 25888 0 3 0x4000080 fsleep syz-executor 6467 489312 16455 0 2 0 syz-executor 6467 316062 16455 0 3 0x4000000 smrbar syz-executor 75029 12297 27009 0 7 0 syz-executor 75029 259567 27009 0 3 0x4000080 fsleep syz-executor 75029 15333 27009 0 3 0x4000000 biowait syz-executor 67089 348546 67903 0 3 0x80 nanoslp syz-executor 67089 159955 67903 0 3 0x4000080 fsleep syz-executor 67089 455898 67903 0 3 0x4000080 kqsel syz-executor 67089 391475 67903 0 3 0x4000080 fsleep syz-executor 55488 248859 66204 0 3 0x80 nanoslp syz-executor 55488 524129 66204 0 3 0x4000080 ttyout syz-executor 55708 138895 69819 0 3 0x80 nanoslp syz-executor 55708 254735 69819 0 3 0x4000080 kqread syz-executor 55708 1360 69819 0 3 0x4000080 fsleep syz-executor 69819 439277 42038 0 3 0x82 nanoslp syz-executor 67903 491193 42038 0 3 0x82 nanoslp syz-executor 16455 302898 42038 0 3 0x82 nanoslp syz-executor 41509 107607 42038 0 3 0x82 nanoslp syz-executor 27009 28565 42038 0 3 0x82 nanoslp syz-executor 89407 444874 42038 0 3 0x2 biowait syz-executor 66204 432436 42038 0 3 0x82 nanoslp syz-executor 25888 147535 42038 0 3 0x82 nanoslp syz-executor 42038 474804 93294 0 3 0x82 kqread syz-executor 93294 490295 16815 0 3 0x10008a sigsusp ksh 16815 106740 32704 0 3 0x98 kqread sshd-session 32704 237203 75175 0 3 0x92 kqread sshd-session 17554 522495 1 0 3 0x100083 ttyin getty 75175 20547 1 0 3 0x88 kqread sshd 10812 52938 17063 74 3 0x1100092 bpf pflogd 17063 184842 1 0 3 0x80 sbwait pflogd 86192 169148 81173 73 3 0x1100090 kqread syslogd 81173 109062 1 0 3 0x100082 sbwait syslogd 11749 185105 1 0 3 0x100080 kqread resolvd 21616 114930 39266 77 3 0x100092 kqread dhcpleased 19369 293683 39266 77 3 0x100092 kqread dhcpleased 39266 169268 1 0 3 0x80 kqread dhcpleased 33584 465327 0 0 3 0x14200 bored smr 37425 437280 0 0 2 0x14200 zerothread 50219 2635 0 0 3 0x14200 aiodoned aiodoned 34702 293764 0 0 3 0x14200 syncer update 11027 98923 0 0 3 0x14200 cleaner cleaner 56027 266961 0 0 3 0x14200 reaper reaper 88659 330180 0 0 3 0x14200 pgdaemon pagedaemon 19286 221464 0 0 3 0x14200 bored viomb 97341 127091 0 0 3 0x40014200 acpi0 acpi0 34596 206008 0 0 3 0x40014200 idle1 95660 1333 0 0 3 0x14200 bored softnet1 50335 409483 0 0 3 0x14200 bored softnet0 77761 421404 0 0 3 0x14200 bored systqmp 23313 373962 0 0 3 0x14200 bored systq 86312 213953 0 0 3 0x14200 tmoslp softclockmp 8138 415554 0 0 3 0x40014200 tmoslp softclock 71504 449239 0 0 3 0x40014200 idle0 1 344720 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 75029 (syz-executor) thread 0xffff80003abd8a80 (15333) exclusive rrwlock inode r = 0 (0xfffffd806c83d310) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd 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:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #10 vn_open+0x34d sys/kern/vfs_vnops.c:116 #11 doopenat+0x35b sys/kern/vfs_syscalls.c:1155 #12 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #13 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806a00e1f0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 vn_open+0x1f1 sys/kern/vfs_vnops.c:107 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1155 #9 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 Process 89407 (syz-executor) thread 0xffff8000ffffd9f8 (444874) exclusive rrwlock inode r = 0 (0xfffffd806a00e690) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x98a sys/kern/vfs_lookup.c:567 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806a00eea8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x98a sys/kern/vfs_lookup.c:567 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11070 12149K 12410K 166960K 12216 0 pcb 20 12K 12K 166960K 31 0 rtable 253 9K 9K 166960K 381 0 pf 41 18K 19K 166960K 57 0 ifaddr 47 8K 8K 166960K 55 0 ifgroup 66 2K 2K 166960K 73 0 sysctl 3 1K 9K 166960K 7 0 counters 84 38K 38K 166960K 96 0 ioctlops 0 0K 4K 166960K 1492 0 iov 0 0K 2K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1298 82K 82K 166960K 1387 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 164 0 proc 69 115K 180K 166960K 551 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 4 0 in_multi 100 7K 7K 166960K 102 0 ether_multi 2 0K 0K 166960K 2 0 mrt 2 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 43 201K 201K 166960K 43 0 exec 0 0K 1K 166960K 385 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 231 159K 176K 166960K 3474 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 42 84K 104K 166960K 1311 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 30 2K 2K 166960K 33 0 temp 36 9074K 9139K 166960K 6475 0 kqueue 17 28K 30K 166960K 36 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 34 0 31 1 0 1 1 0 8 0 rtentry 176 116 0 4 6 0 6 6 0 8 0 unpcb 144 43 0 24 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 19 0 14 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 96 0 83 2 0 2 2 0 8 0 nd6 152 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 10 0 5 1 0 1 1 0 8 0 pppxif 1504 4 0 2 1 0 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 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 pfstitem 24 22 0 0 1 0 1 1 0 8 0 pfstkey 128 22 0 0 1 0 1 1 0 8 0 pfstate 448 22 0 0 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 466 0 6 29 0 29 29 0 8 0 art_table 40 467 0 6 5 0 5 5 0 8 0 art_node 32 115 0 13 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1625 0 151 93 0 93 93 0 8 0 ffsino 296 1625 0 151 114 0 114 114 0 8 0 nchpl 144 1851 0 141 64 0 64 64 0 8 0 rtmask 32 3 0 2 1 0 1 1 0 8 0 vnodes 216 1725 0 0 96 0 96 96 0 8 0 namei 1024 5591 0 5590 2 0 2 2 0 8 1 percpumem 16 63 0 6 1 0 1 1 0 8 0 kstatmem 264 36 0 4 3 0 3 3 0 8 0 scxspl 216 6376 0 6374 3 0 3 3 1 8 2 plimitpl 152 29 0 10 1 0 1 1 0 8 0 sigapl 424 478 0 431 7 0 7 7 0 8 1 knotepl 120 63 0 0 2 0 2 2 0 8 0 kqueuepl 224 35 0 18 2 0 2 2 0 8 0 pipepl 344 123 0 96 3 0 3 3 0 8 0 fdescpl 528 462 0 431 3 0 3 3 0 8 0 filepl 160 1685 0 1450 11 0 11 11 0 8 0 lockfpl 104 14 0 12 1 0 1 1 0 8 0 lockfspl 48 8 0 6 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 97 0 83 1 0 1 1 0 8 0 zombiepl 144 432 0 431 1 0 1 1 0 8 0 processpl 1232 478 0 431 5 0 5 5 0 8 0 procpl 664 529 0 472 6 0 6 6 0 8 0 sockpl 752 174 0 137 5 0 5 5 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 148 0 0 10 0 10 10 0 8 0 bufpl 280 2413 0 105 165 0 165 165 0 8 0 anonpl 32 3969 0 0 33 0 33 33 0 246 0 amapchunkpl 152 9637 0 9155 21 0 21 21 0 158 1 amappl16 200 2196 0 2176 5 0 5 5 0 8 3 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 429 0 428 1 0 1 1 0 8 0 amappl13 176 124 0 112 1 0 1 1 0 8 0 amappl12 168 712 0 682 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 0 1 1 0 8 1 amappl10 152 67 0 53 1 0 1 1 0 8 0 amappl9 144 297 0 297 1 0 1 1 0 8 1 amappl8 136 100 0 98 1 0 1 1 0 8 0 amappl7 128 242 0 229 1 0 1 1 0 8 0 amappl6 120 167 0 166 1 0 1 1 0 8 0 amappl5 112 99 0 89 1 0 1 1 0 8 0 amappl4 104 293 0 274 1 0 1 1 0 8 0 amappl3 96 1643 0 1531 3 0 3 3 0 8 0 amappl2 88 535 0 474 2 0 2 2 0 8 0 amappl1 80 9978 0 9370 17 0 17 17 0 8 3 amappl 88 2739 0 2579 4 0 4 4 0 92 0 uvmvnodes 80 99 0 0 3 0 3 3 0 8 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 462 0 431 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 462 0 431 1 0 1 1 0 8 0 vmmpekpl 168 5771 0 5737 2 0 2 2 0 8 0 vmmpepl 168 39111 0 37213 97 0 97 97 0 357 9 vmsppl 488 461 0 431 5 0 5 5 0 8 1 rwobjpl 80 14802 0 13782 26 0 26 26 0 8 3 pdppl 4096 931 0 862 95 12 83 83 0 8 14 pvpl 32 11024 0 0 89 0 89 89 0 265 0 pmappl 256 461 0 431 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 266 0 15 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8390eff0) 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(ffffffff83980340) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83980340) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff800034bb7060,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x76a8be349cf0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8390eff0) 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(ffffffff83980340) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83980340) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff800034bb7060,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x76a8be349cf0, count: -6 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(ffffffff83451c58) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348ceed,ffffffff8349b4e7,3bb,ffffffff834c44a6) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003abc6348,ffffffff83445af9) at refcnt_finalize+0x1db sys/kern/kern_synch.c:956 pppx_if_destroy(285b9a,ffff80003abc6340) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(285b9a,41,2000,ffff800038bbd4e8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003abe54b0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80609d56e0,41,fffffd80097fd820,ffff800038bbd4e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806071ba50,ffff800038bbd4e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806071ba50,ffff800038bbd4e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806071ba50,ffff800038bbd4e8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806071ba50,ffff800038bbd4e8) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff800038bbd4e8) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff800038bbd4e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800038bbd4e8,ffff80003abe5820,ffff80003abe5770) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80003abe5810, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83451c58) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348ceed,ffffffff8349b4e7,3bb,ffffffff834c44a6) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003abc6348,ffffffff83445af9) at refcnt_finalize+0x1db sys/kern/kern_synch.c:956 pppx_if_destroy(285b9a,ffff80003abc6340) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(285b9a,41,2000,ffff800038bbd4e8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003abe54b0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80609d56e0,41,fffffd80097fd820,ffff800038bbd4e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806071ba50,ffff800038bbd4e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806071ba50,ffff800038bbd4e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806071ba50,ffff800038bbd4e8) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806071ba50,ffff800038bbd4e8) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff800038bbd4e8) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff800038bbd4e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800038bbd4e8,ffff80003abe5820,ffff80003abe5770) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003abe5820) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003abe5820) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72f900e1c450, count: -16