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 15498 53791 0 0 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8346752f) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8341571b,ffffffff8341e064,3b7,ffffffff8341e0e7) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c4274f8,ffffffff8335c65f) at refcnt_finalize+0x1db sys/kern/kern_synch.c:952 pppx_if_destroy(205b9a,ffff80003c4274f0) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,83,2000,ffff80003c4422d0) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff8000357fb670) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ef2b458,83,fffffd80097fb340,ffff80003c4422d0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060ab42a8,ffff80003c4422d0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060ab42a8,ffff80003c4422d0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060ab42a8,ffff80003c4422d0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8060ab42a8,ffff80003c4422d0) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4422d0) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4422d0,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c4422d0,ffff8000357fb9e0,ffff8000357fb930) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff8000357fb9d0, 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 951 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8346752f) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8341571b,ffffffff8341e064,3b7,ffffffff8341e0e7) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c4274f8,ffffffff8335c65f) at refcnt_finalize+0x1db sys/kern/kern_synch.c:952 pppx_if_destroy(205b9a,ffff80003c4274f0) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,83,2000,ffff80003c4422d0) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff8000357fb670) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ef2b458,83,fffffd80097fb340,ffff80003c4422d0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060ab42a8,ffff80003c4422d0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060ab42a8,ffff80003c4422d0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060ab42a8,ffff80003c4422d0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8060ab42a8,ffff80003c4422d0) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4422d0) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4422d0,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c4422d0,ffff8000357fb9e0,ffff8000357fb930) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000357fb9e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000357fb9e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72d22d75f090, count: -16 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000357fb440 rbx 0xffff8000299dedd7 rdx 0 rcx 0xffff80003c4422d0 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd66ede388a50873c r11 0x8fa4abc4d565e05e r12 0xffff8000299debd8 r13 0 r14 0 r15 0x1 rip 0xffffffff82767ef5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000357fb430 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=133326 pid=873 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c4422d0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c442d10,0xffff80003c4434d0 process=0xffff80003ac226e0 user=0xffff8000357f6000, vmspace=0xfffffd806ef00968 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 58826 389117 41994 0 2 0 syz-executor 58826 493771 41994 0 3 0x4000000 smrbar syz-executor 53791 15498 38706 0 7 0 syz-executor 53791 120460 38706 0 3 0x4000080 fifor syz-executor 69343 76283 97764 0 2 0 syz-executor 69343 99021 97764 0 3 0x4000080 fsleep syz-executor 24647 267998 23298 0 2 0 syz-executor 24647 397172 23298 0 3 0x4000080 kqread syz-executor 24647 220079 23298 0 3 0x4000080 fsleep syz-executor 26599 260973 34356 0 3 0x80 nanoslp syz-executor 26599 9393 34356 0 3 0x4000080 kqread syz-executor 26599 151339 34356 0 3 0x4000080 fsleep syz-executor 67320 125704 0 0 3 0x14280 nfsidl nfsio 56156 283370 0 0 3 0x14280 nfsidl nfsio 11522 235033 0 0 3 0x14280 nfsidl nfsio 28680 391671 0 0 3 0x14280 nfsidl nfsio 98178 218269 0 0 3 0x14280 nfsidl nfsio 29229 61567 0 0 3 0x14280 nfsidl nfsio 729 238960 0 0 3 0x14280 nfsidl nfsio 16333 376207 0 0 3 0x14280 nfsidl nfsio 49147 217935 0 0 3 0x14280 nfsidl nfsio 73347 95829 0 0 3 0x14280 nfsidl nfsio 80078 407513 0 0 3 0x14280 nfsidl nfsio 336 186484 0 0 3 0x14280 nfsidl nfsio 70609 125767 0 0 3 0x14280 nfsidl nfsio 28053 518723 0 0 3 0x14280 nfsidl nfsio 22573 31941 0 0 3 0x14280 nfsidl nfsio 22239 252528 0 0 3 0x14280 nfsidl nfsio 68931 354872 0 0 3 0x14280 nfsidl nfsio 79308 443874 0 0 3 0x14280 nfsidl nfsio 76502 131465 0 0 3 0x14280 nfsidl nfsio 82588 37102 0 0 3 0x14280 nfsidl nfsio 31404 352288 0 0 3 0x14200 bored sosplice 34356 249926 73627 0 3 0x82 nanoslp syz-executor 51689 487325 73627 0 3 0x82 nanoslp syz-executor 51332 394031 73627 0 3 0x82 piperd syz-executor 97764 318837 73627 0 3 0x82 nanoslp syz-executor 68973 507703 73627 0 3 0x82 piperd syz-executor 38706 313025 73627 0 3 0x82 nanoslp syz-executor 23298 228928 73627 0 3 0x82 nanoslp syz-executor 41994 292490 73627 0 3 0x82 nanoslp syz-executor 73627 12874 16400 0 2 0x2 syz-executor 16400 313828 65374 0 3 0x10008a sigsusp ksh 65374 39121 4822 0 3 0x98 kqread sshd-session 4822 56284 86034 0 3 0x92 kqread sshd-session 61553 257962 1 0 3 0x100083 ttyopn getty 86034 491861 1 0 3 0x88 kqread sshd 37174 127511 77682 74 3 0x1100092 bpf pflogd 77682 58333 1 0 3 0x80 sbwait pflogd 80579 131492 69382 73 3 0x1100090 kqread syslogd 69382 104554 1 0 3 0x100082 sbwait syslogd 19922 136859 1 0 3 0x100080 kqread resolvd 61245 440640 68654 77 3 0x100092 kqread dhcpleased 25678 181042 68654 77 3 0x100092 kqread dhcpleased 68654 424722 1 0 3 0x80 kqread dhcpleased 61579 19523 0 0 3 0x14200 bored smr 67611 256472 0 0 2 0x14200 zerothread 15615 287174 0 0 3 0x14200 aiodoned aiodoned 86492 170979 0 0 3 0x14200 syncer update 43949 162685 0 0 3 0x14200 cleaner cleaner 52779 516766 0 0 3 0x14200 reaper reaper 10865 370838 0 0 3 0x14200 pgdaemon pagedaemon 27933 132280 0 0 3 0x14200 bored viomb 27155 196844 0 0 3 0x40014200 acpi0 acpi0 487 274389 0 0 3 0x40014200 idle1 53924 257309 0 0 3 0x14200 bored softnet3 350 493465 0 0 3 0x14200 bored softnet2 74974 327806 0 0 3 0x14200 bored softnet1 73236 365644 0 0 3 0x14200 bored softnet0 99033 30116 0 0 3 0x14200 bored systqmp 21455 502010 0 0 3 0x14200 bored systq 26592 399791 0 0 3 0x14200 tmoslp softclockmp 71963 149331 0 0 3 0x40014200 tmoslp softclock 72199 299792 0 0 3 0x40014200 idle0 1 236584 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10223 11362K 11473K 166960K 12642 0 pcb 19 18K 20K 166960K 363 0 rtable 261 10K 11K 166960K 750 0 pf 39 18K 22K 166960K 135 0 ifaddr 45 8K 8K 166960K 85 0 ifgroup 60 2K 2K 166960K 126 0 sysctl 3 1K 9K 166960K 11 0 counters 72 37K 37K 166960K 150 0 ioctlops 0 0K 4K 166960K 1716 0 iov 0 0K 20K 166960K 50 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1407 88K 89K 166960K 2104 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 17 5K 5K 166960K 62 0 dirhash 15 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 106K 166960K 916 0 sigio 0 0K 0K 166960K 18 0 proc 72 91K 152K 166960K 621 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 0 0K 0K 166960K 99 0 in_multi 99 7K 7K 166960K 125 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 531 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 233 159K 174K 166960K 10238 0 UVM aobj 24 2K 2K 166960K 27 0 pinsyscall 41 82K 106K 166960K 1987 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 75 0 NDP 13 0K 2K 166960K 57 0 temp 62 8683K 8755K 166960K 42500 0 kqueue 16 26K 30K 166960K 178 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 120 118 0 115 2 1 1 2 0 8 0 rtentry 176 248 0 139 6 0 6 6 0 8 0 unpcb 144 688 0 669 8 4 4 6 0 8 3 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 476 0 472 16 6 10 10 0 8 9 arp 128 57 0 37 1 0 1 1 0 8 0 inpcb 328 1368 0 1354 16 6 10 10 0 8 8 nd6 144 30 0 0 2 0 2 2 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 36 0 35 1 0 1 1 0 8 0 pppxif 1504 4 0 3 3 2 1 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 8 0 4 1 0 1 1 0 482 0 pffrnode 88 8 0 4 1 0 1 1 0 8 0 pffrent 40 16 0 12 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 pftag 88 3 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 59 0 21 1 0 1 1 0 8 0 pfstkey 128 61 0 23 2 0 2 2 0 8 0 pfstate 384 60 0 22 5 0 5 5 0 8 0 pfrule 1344 32 0 26 2 1 1 2 0 8 0 rttmr 136 5 0 5 3 2 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 660 0 199 33 1 32 32 0 8 2 art_table 32 662 0 199 5 0 5 5 0 8 1 art_node 16 246 0 154 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 8 2 1 1 1 0 8 0 semapl 112 58 0 43 1 0 1 1 0 8 0 shmpl 112 24 0 3 1 0 1 1 0 8 0 dirhash 1024 23 0 4 3 0 3 3 0 8 0 dino2pl 256 3099 0 1590 96 1 95 96 0 8 0 ffsino 288 3099 0 1590 109 0 109 109 0 8 0 nchpl 144 4398 0 2707 64 0 64 64 0 8 0 rtmask 32 5 0 5 2 1 1 1 0 8 1 uvmvnodes 80 3601 0 0 74 0 74 74 0 8 0 vnodes 216 3601 0 0 201 0 201 201 0 8 0 namei 1024 14396 0 14396 3 1 2 2 0 8 2 percpumem 16 90 0 39 1 0 1 1 0 8 0 kstatmem 264 84 0 56 4 1 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 33914 0 33914 12 5 7 8 1 8 7 plimitpl 152 150 0 131 1 0 1 1 0 8 0 sigapl 424 1233 0 1164 9 0 9 9 0 8 0 knotepl 120 490 0 0 15 0 15 15 0 8 0 kqueuepl 224 312 0 295 5 3 2 3 0 8 0 pipepl 336 230 0 203 8 1 7 8 0 8 4 fdescpl 520 1189 0 1159 3 0 3 3 0 8 0 filepl 160 7669 0 7441 25 8 17 20 0 8 7 lockfpl 104 510 0 506 2 0 2 2 0 8 1 lockfspl 48 246 0 242 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 72 0 55 1 0 1 1 0 8 0 ucredpl 104 1038 0 1025 1 0 1 1 0 8 0 zombiepl 144 1165 0 1164 1 0 1 1 0 8 0 processpl 1240 1233 0 1164 6 0 6 6 0 8 0 procpl 656 2645 0 2569 10 1 9 9 0 8 1 sosppl 168 6 0 6 2 2 0 1 0 8 0 sockpl 728 2233 0 2197 32 18 14 24 0 8 10 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 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 114 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 70 0 0 7 0 7 7 0 8 0 mtagpl 96 41 0 0 1 0 1 1 0 8 0 mbufpl 256 3096 0 0 193 0 193 193 0 8 0 bufpl 280 14400 0 8258 439 0 439 439 0 8 0 anonpl 32 12304 0 0 101 1 100 100 0 246 0 amapchunkpl 152 34315 0 33854 36 4 32 32 0 158 10 amappl16 200 5420 0 5385 47 23 24 30 0 8 16 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 106 0 94 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1829 0 1799 4 1 3 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 21 0 18 1 0 1 1 0 8 0 amappl7 128 124 0 111 1 0 1 1 0 8 0 amappl6 120 181 0 178 1 0 1 1 0 8 0 amappl5 112 126 0 115 1 0 1 1 0 8 0 amappl4 104 310 0 290 1 0 1 1 0 8 0 amappl3 96 6554 0 6449 4 0 4 4 0 8 0 amappl2 88 662 0 599 2 0 2 2 0 8 0 amappl1 80 11290 0 10686 15 2 13 15 0 8 0 amappl 88 9415 0 9255 5 0 5 5 0 92 1 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 8 0 8 3 3 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 26 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1189 0 1159 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1189 0 1159 1 0 1 1 0 8 0 vmmpekpl 168 11290 0 11248 3 0 3 3 0 8 0 vmmpepl 168 81012 0 79081 117 3 114 114 0 357 11 vmsppl 480 1188 0 1159 5 1 4 5 0 8 0 rwobjpl 72 27537 0 22984 91 0 91 91 0 8 0 pdppl 4096 2386 0 2318 100 28 72 88 0 8 4 pvpl 32 20750 0 0 167 0 167 167 0 265 0 pmappl 256 1188 0 1159 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 595 0 41 16 0 16 16 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837e1ff0) 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: 0x71d1149ae490, count: 12 ddb{0}> trace x86_ipi_db(ffffffff837e1ff0) 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: 0x71d1149ae490, count: -3 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(ffffffff8346752f) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8341571b,ffffffff8341e064,3b7,ffffffff8341e0e7) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c4274f8,ffffffff8335c65f) at refcnt_finalize+0x1db sys/kern/kern_synch.c:952 pppx_if_destroy(205b9a,ffff80003c4274f0) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,83,2000,ffff80003c4422d0) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff8000357fb670) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ef2b458,83,fffffd80097fb340,ffff80003c4422d0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060ab42a8,ffff80003c4422d0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060ab42a8,ffff80003c4422d0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060ab42a8,ffff80003c4422d0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8060ab42a8,ffff80003c4422d0) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4422d0) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4422d0,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c4422d0,ffff8000357fb9e0,ffff8000357fb930) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff8000357fb9d0, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8346752f) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8341571b,ffffffff8341e064,3b7,ffffffff8341e0e7) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c4274f8,ffffffff8335c65f) at refcnt_finalize+0x1db sys/kern/kern_synch.c:952 pppx_if_destroy(205b9a,ffff80003c4274f0) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,83,2000,ffff80003c4422d0) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff8000357fb670) at spec_close+0x412 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ef2b458,83,fffffd80097fb340,ffff80003c4422d0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8060ab42a8,ffff80003c4422d0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8060ab42a8,ffff80003c4422d0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8060ab42a8,ffff80003c4422d0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8060ab42a8,ffff80003c4422d0) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4422d0) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4422d0,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c4422d0,ffff8000357fb9e0,ffff8000357fb930) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000357fb9e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000357fb9e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72d22d75f090, count: -16