login: 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(ffffffff8333e4e7) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83379b51,ffffffff833d4c6f,3b9,ffffffff833aeb95) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c973618,ffffffff83335249) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b9a,ffff80003c973610) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,2,2000,ffff80003b164fb8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003c988e30) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8067781b50,2,fffffd8007bfb548,ffff80003b164fb8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806aaa8a68,ffff80003b164fb8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806aaa8a68,ffff80003b164fb8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806aaa8a68,ffff80003b164fb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806aaa8a68,ffff80003b164fb8) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003b164fb8) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003b164fb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003b164fb8,ffff80003c989190,ffff80003c9890e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80003c989180, 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(ffffffff8333e4e7) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83379b51,ffffffff833d4c6f,3b9,ffffffff833aeb95) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c973618,ffffffff83335249) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b9a,ffff80003c973610) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,2,2000,ffff80003b164fb8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003c988e30) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8067781b50,2,fffffd8007bfb548,ffff80003b164fb8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806aaa8a68,ffff80003b164fb8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806aaa8a68,ffff80003b164fb8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806aaa8a68,ffff80003b164fb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806aaa8a68,ffff80003b164fb8) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003b164fb8) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003b164fb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003b164fb8,ffff80003c989190,ffff80003c9890e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c989190) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c989190) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a99a96790f0, count: -16 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c988c10 rbx 0 rdx 0 rcx 0 rax 0xffff80003b164fb8 r8 0x101010101010101 r9 0x8080808080808080 r10 0xff1cd54f88b85786 r11 0xf8557498b2ae1489 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff8141e945 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c988c00 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=339939 pid=17 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=80, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003b164fb8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003ca37a28,0xffff80003b166d38 process=0xffff80003ca09b28 user=0xffff80003c984000, vmspace=0xfffffd806ba395d0 estcpu=30, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 78771 90570 26708 0 2 0 syz-executor 78771 503780 26708 0 3 0x4000080 ttyout syz-executor 73836 501526 72249 0 2 0 syz-executor 73836 39927 72249 0 3 0x4000080 fsleep syz-executor 81856 291484 58373 0 2 0 syz-executor 81856 170963 58373 0 3 0x4000000 smrbar syz-executor 81856 277887 58373 0 3 0x4000080 fsleep syz-executor 91217 21690 45406 0 3 0x80 nanoslp syz-executor 91217 501152 45406 0 3 0x4000080 fsleep syz-executor 91217 90329 45406 0 3 0x4000080 fsleep syz-executor 91217 9596 45406 0 3 0x4000080 pipewr syz-executor 67309 98745 0 0 3 0x14200 acct acct 58373 303316 54188 0 3 0x82 nanoslp syz-executor 26196 49616 1 0 3 0x100083 ttyin getty 81372 369833 54188 0 3 0x82 nanoslp syz-executor 65876 272753 0 0 3 0x14280 nfsidl nfsio 60653 211481 0 0 3 0x14280 nfsidl nfsio 58558 513431 0 0 3 0x14280 nfsidl nfsio 71286 75668 0 0 3 0x14280 nfsidl nfsio 11789 247797 0 0 3 0x14280 nfsidl nfsio 98335 298335 0 0 3 0x14280 nfsidl nfsio 2201 487662 0 0 3 0x14280 nfsidl nfsio 46226 36007 0 0 3 0x14280 nfsidl nfsio 75772 324590 0 0 3 0x14280 nfsidl nfsio 95429 478754 0 0 3 0x14280 nfsidl nfsio 57540 170108 0 0 3 0x14280 nfsidl nfsio 79365 98507 0 0 3 0x14280 nfsidl nfsio 99699 440840 0 0 3 0x14280 nfsidl nfsio 64165 30214 0 0 3 0x14280 nfsidl nfsio 26182 33367 0 0 3 0x14280 nfsidl nfsio 82525 368145 0 0 3 0x14280 nfsidl nfsio 66245 390491 0 0 3 0x14280 nfsidl nfsio 95312 263573 0 0 3 0x14280 nfsidl nfsio 49573 517421 0 0 3 0x14280 nfsidl nfsio 25686 430571 0 0 3 0x14280 nfsidl nfsio 49221 59304 0 0 3 0x14200 bored sosplice 19701 264714 54188 0 3 0x82 nanoslp syz-executor 72249 373692 54188 0 3 0x82 nanoslp syz-executor 97464 324493 54188 0 3 0x82 piperd syz-executor 7027 198906 54188 0 3 0x82 nanoslp syz-executor 45406 20562 54188 0 3 0x82 nanoslp syz-executor 26708 412712 54188 0 3 0x82 nanoslp syz-executor 54188 190727 87493 0 2 0x2 syz-executor 87493 366943 19305 0 3 0x10008a sigsusp ksh 19305 336577 56528 0 3 0x98 kqread sshd-session 56528 193489 46253 0 3 0x92 kqread sshd-session 46253 173130 1 0 3 0x88 kqread sshd 84196 228236 88094 73 3 0x1100090 kqread syslogd 88094 255917 1 0 3 0x100082 sbwait syslogd 64684 187691 1 0 3 0x100080 kqread resolvd 40282 223124 22017 77 3 0x100092 kqread dhcpleased 53574 68468 22017 77 3 0x100092 kqread dhcpleased 22017 197868 1 0 3 0x80 kqread dhcpleased 58902 147109 0 0 3 0x14200 bored smr 17652 145728 0 0 2 0x14200 zerothread 78510 310883 0 0 3 0x14200 aiodoned aiodoned 2697 60530 0 0 3 0x14200 syncer update 76340 478052 0 0 3 0x14200 cleaner cleaner 28558 127750 0 0 3 0x14200 reaper reaper 44518 371081 0 0 3 0x14200 pgdaemon pagedaemon 64323 474826 0 0 3 0x14200 bored viomb 54172 257582 0 0 3 0x40014200 acpi0 acpi0 36776 99334 0 0 3 0x14200 bored softnet7 28633 23785 0 0 3 0x14200 bored softnet6 77390 192835 0 0 3 0x14200 bored softnet5 40927 337759 0 0 3 0x14200 bored softnet4 36391 522336 0 0 3 0x14200 bored softnet3 28369 68844 0 0 3 0x14200 bored softnet2 73649 445495 0 0 3 0x14200 bored softnet1 65333 91986 0 0 3 0x14200 bored softnet0 15069 511150 0 0 3 0x14200 smrbar systqmp 5114 107362 0 0 3 0x14200 bored systq 19178 491381 0 0 3 0x40014200 tmoslp softclock 80690 411480 0 0 3 0x40014200 idle0 1 394614 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10475 12172K 12204K 166960K 12767 0 pcb 18 14K 18K 166960K 295 0 rtable 197 7K 8K 166960K 421 0 pf 34 13K 20K 166960K 111 0 ifaddr 41 7K 8K 166960K 84 0 ifgroup 55 2K 2K 166960K 125 0 sysctl 4 1K 9K 166960K 14 0 counters 35 18K 18K 166960K 67 0 ioctlops 0 0K 4K 166960K 167 0 iov 0 0K 21K 166960K 46 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1522 96K 96K 166960K 2310 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 29 0 dirhash 12 2K 3K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 805 0 sigio 0 0K 0K 166960K 75 0 proc 60 59K 91K 166960K 616 0 subproc 72 4K 4K 166960K 92 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 80 0 in_multi 82 6K 7K 166960K 147 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 563 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 163K 167K 166960K 8646 0 UVM aobj 31 2K 2K 166960K 36 0 pinsyscall 38 76K 96K 166960K 1911 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 45 0 NDP 12 0K 2K 166960K 53 0 temp 58 8640K 8707K 166960K 26885 0 kqueue 14 22K 32K 166960K 136 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 120 188 0 184 3 0 3 3 0 8 2 rtentry 136 139 0 61 4 0 4 4 0 8 0 unpcb 144 830 0 813 8 0 8 8 0 8 7 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 9 0 9 1 0 1 1 0 8 1 tcpcb 736 305 0 295 7 0 7 7 0 8 5 arp 88 20 0 8 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 328 839 0 822 7 0 7 7 0 8 5 ip6q 72 2 0 1 1 0 1 1 0 8 0 ip6af 40 4 0 3 1 0 1 1 0 8 0 nd6 104 22 0 7 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1072 24 0 22 1 0 1 1 0 8 0 pppxif 1384 5 0 3 1 0 1 1 0 8 0 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfanchor 1288 6 0 3 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstkey 128 1 0 1 1 0 1 1 0 8 1 pfstate 384 1 0 1 1 0 1 1 0 8 1 pfrule 1344 3 0 3 1 0 1 1 0 8 1 rttmr 136 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 616 0 256 29 0 29 29 0 8 5 art_table 40 619 0 256 5 0 5 5 0 8 0 art_node 32 139 0 72 1 0 1 1 0 8 0 sysvmsgpl 40 49 0 10 1 0 1 1 0 8 0 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 33 0 5 1 0 1 1 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 2978 0 1479 95 0 95 95 0 8 0 ffsino 256 2978 0 1479 95 0 95 95 0 8 0 nchpl 144 4069 0 2379 63 0 63 63 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 uvmvnodes 80 3623 0 0 74 0 74 74 0 8 0 vnodes 216 3623 0 0 202 0 202 202 0 8 0 namei 1024 14555 0 14555 2 0 2 2 0 8 2 kstatmem 264 66 0 42 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 1 0 1 1 0 8 1 scxspl 216 18070 0 18070 8 0 8 8 1 8 8 plimitpl 152 364 0 347 1 0 1 1 0 8 0 sigapl 424 1112 0 1041 9 0 9 9 0 8 0 knotepl 120 42077 0 42029 17 7 10 17 0 8 8 kqueuepl 184 318 0 307 5 0 5 5 0 8 4 pipepl 304 171 0 143 3 0 3 3 0 8 0 fdescpl 448 1070 0 1041 5 0 5 5 0 8 1 filepl 120 7131 0 6834 17 1 16 17 0 8 6 lockfpl 104 312 0 310 1 0 1 1 0 8 0 lockfspl 48 142 0 140 1 0 1 1 0 8 0 sessionpl 144 28 0 20 1 0 1 1 0 8 0 pgrppl 48 49 0 33 1 0 1 1 0 8 0 ucredpl 104 1208 0 1197 1 0 1 1 0 8 0 zombiepl 144 1044 0 1041 1 0 1 1 0 8 0 processpl 1152 1112 0 1041 6 0 6 6 0 8 0 procpl 664 2137 0 2059 8 0 8 8 0 8 0 sosppl 168 4 0 4 1 0 1 1 0 8 1 sockpl 552 1922 0 1884 23 12 11 20 0 8 7 mcl64k 65536 99 0 98 1 0 1 1 0 8 0 mcl16k 16384 2 0 2 1 0 1 1 0 8 1 mcl12k 12288 65 0 65 1 0 1 1 0 8 1 mcl8k 8192 106 0 106 1 0 1 1 0 8 1 mcl4k 4096 3312 0 3254 16 0 16 16 0 8 7 mcl2k 2048 1251 0 1243 3 0 3 3 0 8 1 mtagpl 96 7 0 7 1 0 1 1 0 8 1 mbufpl 256 11298 0 11057 18 0 18 18 0 8 1 bufpl 280 9534 0 3306 446 0 446 446 0 8 0 anonpl 24 169774 0 166502 70 0 70 70 0 187 39 amapchunkpl 152 27771 0 27267 26 0 26 26 0 158 5 amappl16 200 3185 0 3154 34 22 12 27 0 8 8 amappl15 192 5 0 5 1 0 1 1 0 8 1 amappl14 184 113 0 103 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 0 1 1 0 8 1 amappl12 168 1754 0 1725 2 0 2 2 0 8 0 amappl11 160 65 0 55 1 0 1 1 0 8 0 amappl10 152 7 0 6 1 0 1 1 0 8 0 amappl9 144 256 0 255 1 0 1 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 109 0 99 1 0 1 1 0 8 0 amappl6 120 192 0 189 1 0 1 1 0 8 0 amappl5 112 120 0 114 1 0 1 1 0 8 0 amappl4 104 344 0 328 1 0 1 1 0 8 0 amappl3 96 5536 0 5422 4 0 4 4 0 8 0 amappl2 88 666 0 608 2 0 2 2 0 8 0 amappl1 80 11426 0 10877 14 0 14 14 0 8 1 amappl 88 7807 0 7637 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 1 0 1 1 0 8 1 dma128 128 255 0 255 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 35 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1070 0 1041 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1070 0 1041 1 0 1 1 0 8 0 vmmpekpl 168 9581 0 9539 3 0 3 3 0 8 1 vmmpepl 168 72354 0 70466 107 0 107 107 0 357 19 vmsppl 368 1069 0 1041 4 0 4 4 0 8 1 rwobjpl 40 24248 0 19727 46 0 46 46 0 8 0 pdppl 4096 2146 0 2082 106 38 68 82 0 8 4 pvpl 32 464812 0 456124 149 0 149 149 0 265 54 pmappl 216 1069 0 1041 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 393 0 38 11 0 11 11 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(ffffffff8333e4e7) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83379b51,ffffffff833d4c6f,3b9,ffffffff833aeb95) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c973618,ffffffff83335249) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b9a,ffff80003c973610) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,2,2000,ffff80003b164fb8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003c988e30) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8067781b50,2,fffffd8007bfb548,ffff80003b164fb8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806aaa8a68,ffff80003b164fb8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806aaa8a68,ffff80003b164fb8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806aaa8a68,ffff80003b164fb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806aaa8a68,ffff80003b164fb8) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003b164fb8) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003b164fb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003b164fb8,ffff80003c989190,ffff80003c9890e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c989190) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c989190) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a99a96790f0, 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(ffffffff8333e4e7) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83379b51,ffffffff833d4c6f,3b9,ffffffff833aeb95) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c973618,ffffffff83335249) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b9a,ffff80003c973610) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b9a,2,2000,ffff80003b164fb8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003c988e30) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8067781b50,2,fffffd8007bfb548,ffff80003b164fb8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806aaa8a68,ffff80003b164fb8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806aaa8a68,ffff80003b164fb8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806aaa8a68,ffff80003b164fb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806aaa8a68,ffff80003b164fb8) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003b164fb8) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003b164fb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003b164fb8,ffff80003c989190,ffff80003c9890e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c989190) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c989190) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a99a96790f0, count: -16