panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_synch.c", line 953 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83339f31) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83377c99,ffffffff833d3431,3b9,ffffffff833aca2e) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff800031d2f0b0,ffffffff8332f88d) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b9a,ffff800031d2f0a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,1,2000,ffff80002a80b4f0) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003a952c80) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a1f0c10,1,fffffd8007bfb478,ffff80002a80b4f0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80698a44c8,ffff80002a80b4f0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80698a44c8,ffff80002a80b4f0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80698a44c8,ffff80002a80b4f0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80698a44c8,ffff80002a80b4f0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a80b4f0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a80b4f0,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a80b4f0,ffff80003a952fe0,ffff80003a952f30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80003a952fd0, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_synch.c", line 953 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83339f31) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83377c99,ffffffff833d3431,3b9,ffffffff833aca2e) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff800031d2f0b0,ffffffff8332f88d) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b9a,ffff800031d2f0a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,1,2000,ffff80002a80b4f0) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003a952c80) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a1f0c10,1,fffffd8007bfb478,ffff80002a80b4f0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80698a44c8,ffff80002a80b4f0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80698a44c8,ffff80002a80b4f0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80698a44c8,ffff80002a80b4f0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80698a44c8,ffff80002a80b4f0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a80b4f0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a80b4f0,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a80b4f0,ffff80003a952fe0,ffff80003a952f30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003a952fe0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003a952fe0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77e578bcca90, count: -16 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003a952a60 rbx 0 rdx 0 rcx 0 rax 0xffff80002a80b4f0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xff71635b5ef4b1cd r11 0x9a80a879c2b918ec r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff81e889d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003a952a50 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=368514 pid=11856 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a80b4f0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800031d2ba30,0xffff800031d2a818 process=0xffff8000ffff31a8 user=0xffff80003a94e000, vmspace=0xfffffd806ba55a20 estcpu=36, cpticks=8, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 31760 442113 19927 0 2 0 syz-executor 31760 184569 19927 0 3 0x4000000 smrbar syz-executor 31760 150630 19927 0 3 0x4000080 fsleep syz-executor 55431 243156 59368 -1 2 0xc90 syz-executor 55431 8677 59368 -1 3 0x4000090 fsleep syz-executor 55431 48260 59368 -1 3 0x4000090 fsleep syz-executor 55431 475225 59368 -1 3 0x4000090 fsleep syz-executor 45109 68990 2782 0 3 0x80 nanoslp syz-executor 45109 266957 2782 0 3 0x4000080 kqread syz-executor 45109 250207 2782 0 3 0x4000080 kqread syz-executor 45109 202741 2782 0 3 0x4000080 fsleep syz-executor 45109 119178 2782 0 3 0x4000080 fsleep syz-executor 69142 235596 72873 0 2 0xc80 syz-executor 69142 167418 72873 0 3 0x4000080 kqread syz-executor 69142 52469 72873 0 3 0x4000080 fsleep syz-executor 55725 271197 24913 0 2 0xc82 syz-executor 90152 35851 0 0 3 0x14280 nfsidl nfsio 60528 109478 0 0 3 0x14280 nfsidl nfsio 49881 462829 0 0 3 0x14280 nfsidl nfsio 68746 220413 0 0 3 0x14280 nfsidl nfsio 74044 494105 0 0 3 0x14280 nfsidl nfsio 98352 8602 0 0 3 0x14280 nfsidl nfsio 80385 508771 0 0 3 0x14280 nfsidl nfsio 92997 272106 0 0 3 0x14280 nfsidl nfsio 95327 475706 0 0 3 0x14280 nfsidl nfsio 90261 132818 0 0 3 0x14280 nfsidl nfsio 75785 397139 0 0 3 0x14280 nfsidl nfsio 78357 153168 0 0 3 0x14280 nfsidl nfsio 72059 339375 0 0 3 0x14280 nfsidl nfsio 73275 164012 0 0 3 0x14280 nfsidl nfsio 72515 319527 0 0 3 0x14280 nfsidl nfsio 19393 371940 0 0 3 0x14280 nfsidl nfsio 2721 96728 0 0 3 0x14280 nfsidl nfsio 86809 79169 0 0 3 0x14280 nfsidl nfsio 3600 37280 0 0 3 0x14280 nfsidl nfsio 13409 106708 0 0 3 0x14280 nfsidl nfsio 24193 439625 0 0 3 0x14200 bored sosplice 72873 118922 24913 0 2 0xc82 syz-executor 2782 10718 24913 0 2 0xc82 syz-executor 40723 24873 24913 0 3 0x82 wait syz-executor 42287 304250 24913 0 2 0xc82 syz-executor 19927 446606 24913 0 2 0xc82 syz-executor 21825 278825 24913 0 3 0x82 wait syz-executor 59368 423072 24913 0 2 0xc82 syz-executor 24913 321240 2892 0 3 0x82 kqread syz-executor 2892 176304 59886 0 3 0x10008a sigsusp ksh 59886 118540 65515 0 3 0x98 kqread sshd-session 65515 267185 77966 0 3 0x92 kqread sshd-session 8942 102960 1 0 3 0x100083 ttyin getty 77966 264054 1 0 3 0x88 kqread sshd 52491 80003 84509 73 3 0x1100090 kqread syslogd 84509 348098 1 0 3 0x100082 sbwait syslogd 7939 24409 1 0 3 0x100080 kqread resolvd 51865 252208 9687 77 3 0x100092 kqread dhcpleased 83953 356263 9687 77 3 0x100092 kqread dhcpleased 9687 312922 1 0 3 0x80 kqread dhcpleased 60778 136762 0 0 3 0x14200 bored smr 69646 277762 0 0 2 0x14200 zerothread 48515 335238 0 0 3 0x14200 aiodoned aiodoned 30993 209468 0 0 3 0x14200 syncer update 43191 172083 0 0 3 0x14200 cleaner cleaner 65156 331748 0 0 3 0x14200 reaper reaper 47110 27150 0 0 3 0x14200 pgdaemon pagedaemon 27140 29772 0 0 3 0x14200 bored viomb 83143 150228 0 0 3 0x40014200 acpi0 acpi0 71351 409826 0 0 3 0x14200 bored softnet7 47146 126618 0 0 3 0x14200 bored softnet6 17582 79614 0 0 3 0x14200 bored softnet5 58154 359625 0 0 3 0x14200 bored softnet4 35959 246573 0 0 3 0x14200 bored softnet3 71536 294683 0 0 3 0x14200 bored softnet2 81573 389697 0 0 3 0x14200 bored softnet1 13424 305791 0 0 3 0x14200 bored softnet0 4673 171230 0 0 3 0x14200 bored systqmp 78795 489752 0 0 3 0x14200 bored systq 79264 471914 0 0 2 0x40014200 softclock 72889 20875 0 0 3 0x40014200 idle0 1 413577 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10197 11060K 11285K 166960K 12153 0 pcb 19 14K 16K 166960K 234 0 rtable 197 6K 7K 166960K 357 0 pf 41 15K 131087K 166960K 86 0 ifaddr 45 7K 8K 166960K 80 0 ifgroup 61 2K 2K 166960K 121 0 sysctl 3 1K 9K 166960K 14 0 counters 37 18K 18K 166960K 63 0 ioctlops 0 0K 4K 166960K 228 0 iov 0 0K 16K 166960K 98 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1408 89K 89K 166960K 2023 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 19 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 567 0 sigio 0 0K 0K 166960K 9 0 proc 60 59K 124K 166960K 526 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 3 0K 0K 166960K 40 0 in_multi 90 6K 7K 166960K 130 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 2 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 388 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 261 144K 158K 166960K 6630 0 UVM aobj 79 3K 3K 166960K 80 0 pinsyscall 39 78K 96K 166960K 1620 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 33 0 NDP 14 0K 1K 166960K 49 0 temp 55 8638K 8716K 166960K 20557 0 kqueue 19 30K 32K 166960K 98 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 71 0 68 1 0 1 1 0 8 0 rtentry 136 127 0 41 4 0 4 4 0 8 0 unpcb 144 458 0 435 6 0 6 6 0 8 5 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 156 0 149 5 0 5 5 0 8 4 arp 88 15 0 2 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 328 669 0 651 8 1 7 7 0 8 5 ip6q 72 7 0 2 1 0 1 1 0 8 0 ip6af 40 10 0 4 1 0 1 1 0 8 0 nd6 104 21 0 6 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 19 0 16 1 0 1 1 0 8 0 pppxif 1384 10 0 8 1 0 1 1 0 8 0 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pfstitem 24 5 0 0 1 0 1 1 0 8 0 pfstkey 128 74 0 70 1 0 1 1 0 8 0 pfstate 384 38 0 35 1 0 1 1 0 8 0 pfrule 1344 1 0 1 1 1 0 1 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 589 0 185 30 0 30 30 0 8 4 art_table 40 591 0 185 5 0 5 5 0 8 0 art_node 32 127 0 51 1 0 1 1 0 8 0 sysvmsgpl 40 48 0 44 1 0 1 1 0 8 0 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 77 0 1 3 0 3 3 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2555 0 1053 95 0 95 95 0 8 0 ffsino 256 2555 0 1053 95 0 95 95 0 8 0 nchpl 144 3295 0 1607 63 0 63 63 0 8 0 uvmvnodes 80 2970 0 0 61 0 61 61 0 8 0 vnodes 216 2970 0 0 165 0 165 165 0 8 0 namei 1024 10671 0 10671 2 1 1 2 0 8 1 kstatmem 264 62 0 34 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 13916 0 13916 15 7 8 8 1 8 8 plimitpl 152 142 0 124 1 0 1 1 0 8 0 sigapl 424 869 0 798 9 0 9 9 0 8 0 knotepl 120 34880 0 34595 17 7 10 10 0 8 1 kqueuepl 184 162 0 143 1 0 1 1 0 8 0 pipepl 304 147 0 119 3 0 3 3 0 8 0 fdescpl 448 827 0 797 5 0 5 5 0 8 1 filepl 120 5125 0 4882 12 0 12 12 0 8 4 lockfpl 104 261 0 259 1 0 1 1 0 8 0 lockfspl 48 121 0 119 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 38 0 22 1 0 1 1 0 8 0 ucredpl 104 1110 0 1096 1 0 1 1 0 8 0 zombiepl 144 802 0 798 1 0 1 1 0 8 0 processpl 1152 869 0 798 6 0 6 6 0 8 0 procpl 664 1574 0 1492 9 1 8 8 0 8 0 sosppl 168 8 0 8 1 0 1 1 0 8 1 sockpl 552 1214 0 1170 13 3 10 12 0 8 6 mcl64k 65536 107 0 107 2 1 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 6 0 6 2 1 1 1 0 8 1 mcl4k 4096 2996 0 2944 13 5 8 13 0 8 1 mcl2k 2048 859 0 847 4 0 4 4 0 8 1 mtagpl 96 8 0 4 2 1 1 1 0 8 0 mbufpl 256 8935 0 8728 23 0 23 23 0 8 4 bufpl 280 6153 0 129 431 0 431 431 0 8 0 anonpl 24 144261 0 140440 47 3 44 44 0 187 16 amapchunkpl 152 21562 0 20959 31 0 31 31 0 158 7 amappl16 200 2393 0 2359 21 11 10 14 0 8 7 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 106 0 96 1 0 1 1 0 8 0 amappl13 176 23 0 23 1 1 0 1 0 8 0 amappl12 168 1455 0 1425 3 1 2 3 0 8 0 amappl11 160 43 0 33 1 0 1 1 0 8 0 amappl10 152 26 0 26 1 1 0 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 33 0 31 1 0 1 1 0 8 0 amappl7 128 100 0 89 1 0 1 1 0 8 0 amappl6 120 181 0 178 1 0 1 1 0 8 0 amappl5 112 119 0 112 1 0 1 1 0 8 0 amappl4 104 276 0 259 1 0 1 1 0 8 0 amappl3 96 4043 0 3918 4 0 4 4 0 8 0 amappl2 88 631 0 575 2 0 2 2 0 8 0 amappl1 80 9940 0 9388 13 0 13 13 0 8 1 amappl 88 5898 0 5700 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 0 1 1 0 8 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 dma512 512 1 0 1 1 0 1 1 0 8 1 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 79 0 1 2 0 2 2 0 8 0 uaddrrnd 24 827 0 797 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 827 0 797 1 0 1 1 0 8 0 vmmpekpl 168 7881 0 7841 2 0 2 2 0 8 0 vmmpepl 168 57279 0 55335 92 0 92 92 0 357 7 vmsppl 368 826 0 797 4 0 4 4 0 8 1 rwobjpl 40 20173 0 16226 40 0 40 40 0 8 0 pdppl 4096 1660 0 1594 108 40 68 82 0 8 2 pvpl 32 373859 0 364507 122 0 122 122 0 265 33 pmappl 216 826 0 797 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 400 0 51 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83339f31) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83377c99,ffffffff833d3431,3b9,ffffffff833aca2e) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff800031d2f0b0,ffffffff8332f88d) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b9a,ffff800031d2f0a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,1,2000,ffff80002a80b4f0) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003a952c80) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a1f0c10,1,fffffd8007bfb478,ffff80002a80b4f0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80698a44c8,ffff80002a80b4f0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80698a44c8,ffff80002a80b4f0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80698a44c8,ffff80002a80b4f0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80698a44c8,ffff80002a80b4f0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a80b4f0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a80b4f0,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a80b4f0,ffff80003a952fe0,ffff80003a952f30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003a952fe0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003a952fe0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77e578bcca90, count: -16 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83339f31) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83377c99,ffffffff833d3431,3b9,ffffffff833aca2e) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff800031d2f0b0,ffffffff8332f88d) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b9a,ffff800031d2f0a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,1,2000,ffff80002a80b4f0) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003a952c80) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a1f0c10,1,fffffd8007bfb478,ffff80002a80b4f0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80698a44c8,ffff80002a80b4f0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80698a44c8,ffff80002a80b4f0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80698a44c8,ffff80002a80b4f0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80698a44c8,ffff80002a80b4f0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a80b4f0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a80b4f0,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a80b4f0,ffff80003a952fe0,ffff80003a952f30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003a952fe0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003a952fe0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77e578bcca90, count: -16