panic: vref used where vget required Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 31869 99479 0 0x8000002 0 0K syz-executor.2 *149608 76546 0 0x8000002 0 1 syz-executor.0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828d536f) at panic+0x17b sys/kern/subr_prf.c:198 vref(fffffd8008ba5298) at vref+0xc7 sys/kern/vfs_subr.c:698 namei(ffff800032b24208) at namei+0x3b2 sys/kern/vfs_lookup.c:221 vn_open(ffff800032b24208,30001,0) at vn_open+0x101 sys/kern/vfs_vnops.c:140 doopenat(ffff80002a1491f8,ffffff9c,7b43d8966680,30000,0,ffff800032b243b0) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff800032b24460) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff800032b24460) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b43d8966180, count: 7 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: vref used where vget required ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828d536f) at panic+0x17b sys/kern/subr_prf.c:198 vref(fffffd8008ba5298) at vref+0xc7 sys/kern/vfs_subr.c:698 namei(ffff800032b24208) at namei+0x3b2 sys/kern/vfs_lookup.c:221 vn_open(ffff800032b24208,30001,0) at vn_open+0x101 sys/kern/vfs_vnops.c:140 doopenat(ffff80002a1491f8,ffffff9c,7b43d8966680,30000,0,ffff800032b243b0) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff800032b24460) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff800032b24460) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b43d8966180, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800032b23ea0 rbx 0xffff800029cecd77 rdx 0 rcx 0xffff80002a1491f8 rax 0xffff800029cebff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4428bec1932dda1e r11 0x6c46a94d1a67dd92 r12 0xffff800029cecb78 r13 0 r14 0 r15 0x1 rip 0xffffffff826deb8c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800032b23e90 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) tid=149608 pid=76546 tcnt=1 stat=onproc flags process=8000002 proc=0 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff800030ae8d10,0xffff80002ab6f4d8 process=0xffff80002aaf2828 user=0xffff800032b1f000, vmspace=0xfffffd8067eeac20 estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10076 176204 67394 0 3 0x8000080 nanoslp syz-executor.6 10076 302141 67394 0 3 0xc000080 netcon syz-executor.6 50130 113228 55513 0 3 0x8000080 nanoslp syz-executor.4 50130 474416 55513 0 3 0xc000080 kqsel syz-executor.4 65531 217837 1 0 3 0x8000080 nanoslp syz-executor.3 65531 435453 1 0 3 0xc000080 ttyout syz-executor.3 65531 155960 1 0 3 0xc000080 ttyin syz-executor.3 65531 240286 1 0 3 0xc000080 fsleep syz-executor.3 21888 113984 61374 0 3 0x8000082 nanoslp syz-executor.1 75953 416685 1 0 3 0x18000082 nanoslp getty 67394 443824 61374 0 2 0x8000482 syz-executor.6 99479 31869 61374 0 7 0x8000002 syz-executor.2 4630 200645 61374 0 2 0x8000482 syz-executor.5 *76546 149608 61374 0 7 0x8000002 syz-executor.0 33886 25978 61374 0 2 0x8000002 syz-executor.7 55513 472387 61374 0 2 0x8000002 syz-executor.4 73209 59345 0 0 3 0x14280 nfsidl nfsio 5826 239865 0 0 3 0x14280 nfsidl nfsio 84825 8523 0 0 3 0x14280 nfsidl nfsio 16336 232569 0 0 3 0x14280 nfsidl nfsio 94794 180833 0 0 3 0x14280 nfsidl nfsio 5908 318763 0 0 3 0x14280 nfsidl nfsio 58168 329190 0 0 3 0x14280 nfsidl nfsio 82408 368106 0 0 3 0x14280 nfsidl nfsio 46147 24650 0 0 3 0x14280 nfsidl nfsio 75519 75646 0 0 3 0x14280 nfsidl nfsio 84617 207069 0 0 3 0x14280 nfsidl nfsio 54696 235685 0 0 3 0x14280 nfsidl nfsio 3887 54848 0 0 3 0x14280 nfsidl nfsio 47125 340185 0 0 3 0x14280 nfsidl nfsio 46112 489364 0 0 3 0x14280 nfsidl nfsio 29683 293245 0 0 3 0x14280 nfsidl nfsio 36701 354694 0 0 3 0x14280 nfsidl nfsio 11022 22577 0 0 3 0x14280 nfsidl nfsio 27250 431259 0 0 3 0x14280 nfsidl nfsio 84990 426974 0 0 3 0x14280 nfsidl nfsio 24336 51055 0 0 3 0x14200 bored sosplice 61374 487917 25932 0 3 0x1a000082 wait syz-fuzzer 61374 506702 25932 0 2 0x1e000482 syz-fuzzer 61374 299971 25932 0 3 0x1e000082 thrsleep syz-fuzzer 61374 286352 25932 0 2 0x1e000002 syz-fuzzer 61374 119924 25932 0 3 0x1e000082 wait syz-fuzzer 61374 496713 25932 0 3 0x1e000082 thrsleep syz-fuzzer 61374 221895 25932 0 3 0x1e000082 wait syz-fuzzer 61374 226108 25932 0 3 0x1e000082 thrsleep syz-fuzzer 61374 69288 25932 0 3 0x1e000082 thrsleep syz-fuzzer 61374 462182 25932 0 3 0x1e000082 thrsleep syz-fuzzer 61374 424882 25932 0 3 0x1e000082 thrsleep syz-fuzzer 61374 240401 25932 0 3 0x1e000082 wait syz-fuzzer 61374 505125 25932 0 2 0x1e000082 syz-fuzzer 61374 427615 25932 0 3 0x1e000082 wait syz-fuzzer 61374 504195 25932 0 3 0x1e000082 wait syz-fuzzer 61374 472970 25932 0 3 0x1e000082 wait syz-fuzzer 25932 362886 95435 0 3 0x810008a sigsusp ksh 95435 286134 7664 0 3 0x1800009a kqread sshd 7664 372682 1 0 3 0x18000088 kqread sshd 7392 353183 86852 73 2 0x19100010 syslogd 86852 69972 1 0 3 0x18100082 sbwait syslogd 14478 253255 1 0 3 0x18100080 kqread resolvd 27814 341885 62959 77 3 0x18100092 kqread dhcpleased 44333 400654 62959 77 3 0x18100092 kqread dhcpleased 62959 233900 1 0 3 0x18000080 kqread dhcpleased 57315 229546 0 0 3 0x14200 bored smr 94505 476663 0 0 3 0x14200 pgzero zerothread 31799 10762 0 0 3 0x14200 aiodoned aiodoned 36395 255982 0 0 3 0x14200 syncer update 77287 452519 0 0 3 0x14200 cleaner cleaner 76562 473312 0 0 3 0x14200 reaper reaper 64633 493739 0 0 3 0x14200 pgdaemon pagedaemon 21249 12984 0 0 3 0x14200 bored viomb 36715 264700 0 0 3 0x40014200 acpi0 acpi0 25644 522956 0 0 3 0x40014200 idle1 16958 427925 0 0 3 0x14200 bored softnet3 73875 487607 0 0 3 0x14200 bored softnet2 21289 32449 0 0 3 0x14200 bored softnet1 87576 518192 0 0 3 0x14200 bored softnet0 17381 38241 0 0 3 0x14200 bored systqmp 41920 5085 0 0 3 0x14200 bored systq 29176 21257 0 0 3 0x14200 tmoslp softclockmp 15843 15141 0 0 3 0x40014200 tmoslp softclock 6395 300735 0 0 3 0x40014200 idle0 1 388152 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 76546 (syz-executor.0) thread 0xffff80002a1491f8 (149608) Process 7392 (syslogd) thread 0xffff8000ffffd200 (353183) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 6506K 6964K 166960K 14552 0 pcb 17 14K 15K 166960K 319 0 rtable 200 6K 7K 166960K 1149 0 pf 28 8K 10K 166960K 148 0 ifaddr 40 15K 15K 166960K 161 0 ifgroup 49 2K 2K 166960K 242 0 sysctl 4 1K 3K 166960K 9 0 counters 62 36K 36K 166960K 158 0 ioctlops 0 0K 4K 166960K 1609 0 iov 0 0K 24K 166960K 129 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1378 87K 87K 166960K 3247 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 63 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 136 0 dirhash 12 2K 3K 166960K 90 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 12 41K 93K 166960K 2312 0 sigio 0 0K 0K 166960K 45 0 proc 59 79K 115K 166960K 1252 0 subproc 104 6K 7K 166960K 365 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 371 0 in_multi 88 6K 7K 166960K 399 0 ether_multi 1 0K 0K 166960K 31 0 mrt 1 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 925 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 255 90K 98K 166960K 22011 0 UVM aobj 101 5K 5K 166960K 102 0 pinsyscall 32 64K 100K 166960K 4039 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 154 0 NDP 10 0K 1K 166960K 114 0 temp 75 6820K 6948K 166960K 63886 0 kqueue 13 20K 28K 166960K 379 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 340 0 337 3 2 1 3 0 8 0 rtentry 112 376 0 285 4 0 4 4 0 8 0 unpcb 144 1594 0 1580 5 1 4 4 0 8 3 syncache 336 9 0 9 5 5 0 1 0 8 0 tcpqe 32 125 0 125 3 3 0 1 0 8 0 tcpcb 808 692 0 683 12 10 2 6 0 8 1 arp 120 64 0 47 1 0 1 1 0 8 0 inpcb 384 2466 0 2452 21 16 5 8 0 8 3 nd6 136 101 0 77 1 0 1 1 0 8 0 pkpcb 40 13 0 13 8 8 0 1 0 8 0 kcovpl 48 28 0 20 1 0 1 1 0 8 0 ppxss 1168 7 0 7 4 3 1 1 0 8 1 pffrag 232 25 0 17 1 0 1 1 0 482 0 pffrnode 88 22 0 15 1 0 1 1 0 8 0 pffrent 40 167 0 159 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 24 185 0 148 1 0 1 1 0 8 0 pfstkey 128 185 0 148 2 0 2 2 0 8 0 pfstate 376 185 0 148 6 1 5 6 0 8 0 pfrule 1344 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 1431 0 1022 36 10 26 29 0 8 0 art_table 32 1432 0 1022 4 0 4 4 0 8 0 art_node 16 368 0 286 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 9 4 4 0 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 132 0 122 1 0 1 1 0 8 0 shmpl 112 99 0 1 3 0 3 3 0 8 0 dirhash 1024 69 0 52 3 0 3 3 0 8 0 dino2pl 256 5250 0 3736 96 0 96 96 0 8 0 ffsino 272 5250 0 3736 102 0 102 102 0 8 0 nchpl 144 9030 0 8427 67 41 26 67 0 8 0 uvmvnodes 80 6607 0 0 135 0 135 135 0 8 0 vnodes 216 6607 0 0 368 0 368 368 0 8 0 vnodes: pool(0xffffffff82da0aa8:vnodes): page inconsistency: page 0x0; at page head addr 0xfffffd8008ba5f90 (p 0xfffffd8008ba5000) namei 1024 31788 0 31787 9 8 1 2 0 8 0 percpumem 16 93 0 48 1 0 1 1 0 8 0 vcpupl 3904 7 0 2 1 0 1 1 0 8 0 vmpool 696 14 0 9 1 0 1 1 0 8 0 kstatmem 264 116 0 96 2 0 2 2 0 8 0 scsiplug 72 9 0 9 6 5 1 1 0 8 1 scxspl 216 57073 0 57072 24 23 1 8 1 8 0 plimitpl 152 548 0 532 1 0 1 1 0 8 0 sigapl 424 2619 0 2555 9 1 8 8 0 8 0 futexpl 64 37981 0 37980 4 3 1 1 0 8 0 knotepl 120 667 0 0 17 0 17 17 0 8 0 kqueuepl 216 752 0 741 2 1 1 2 0 8 0 pipepl 320 485 0 457 3 0 3 3 0 8 0 fdescpl 496 2577 0 2554 6 2 4 5 0 8 0 filepl 152 17315 0 17064 24 11 13 15 0 8 0 lockfpl 104 704 0 701 1 0 1 1 0 8 0 lockfspl 48 293 0 290 1 0 1 1 0 8 0 sessionpl 144 47 0 32 1 0 1 1 0 8 0 pgrppl 48 69 0 54 1 0 1 1 0 8 0 ucredpl 104 3160 0 3148 1 0 1 1 0 8 0 zombiepl 144 2557 0 2555 1 0 1 1 0 8 0 processpl 1136 2619 0 2555 8 2 6 6 0 8 0 procpl 656 5031 0 4947 10 1 9 9 0 8 0 srpgc 96 24 0 24 6 5 1 1 0 8 1 sosppl 168 31 0 31 9 8 1 1 0 8 1 sockpl 664 4440 0 4410 33 24 9 9 0 8 6 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 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 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 384 0 0 48 0 48 48 0 8 0 mtagpl 96 19 0 0 1 0 1 1 0 8 0 mbufpl 256 1095 0 0 61 0 61 61 0 8 0 bufpl 280 11707 0 3970 553 0 553 553 0 8 0 anonpl 24 490166 0 483898 170 94 76 93 0 186 6 amapchunkpl 152 72826 0 72238 89 49 40 42 0 158 8 amappl16 200 12438 0 12284 75 54 21 25 0 8 4 amappl15 192 26 0 26 1 1 0 1 0 8 0 amappl14 184 225 0 213 2 0 2 2 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 3551 0 3526 3 0 3 3 0 8 0 amappl11 160 64 0 53 1 0 1 1 0 8 0 amappl10 152 94 0 84 1 0 1 1 0 8 0 amappl9 144 190 0 190 3 3 0 1 0 8 0 amappl8 136 226 0 186 2 0 2 2 0 8 0 amappl7 128 57 0 43 1 0 1 1 0 8 0 amappl6 120 606 0 590 2 1 1 2 0 8 0 amappl5 112 256 0 242 1 0 1 1 0 8 0 amappl4 104 713 0 679 2 0 2 2 0 8 0 amappl3 96 13809 0 13741 4 1 3 3 0 8 0 amappl2 88 3027 0 2961 4 2 2 4 0 8 0 amappl1 80 17859 0 17377 23 11 12 22 0 8 0 amappl 88 21113 0 20944 6 0 6 6 0 92 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 72 101 0 1 2 0 2 2 0 8 0 uaddrrnd 24 2591 0 2563 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2591 0 2563 1 0 1 1 0 8 0 vmmpekpl 168 21019 0 20944 4 0 4 4 0 8 0 vmmpepl 168 180991 0 179294 163 62 101 115 0 357 2 vmsppl 440 2590 0 2563 4 0 4 4 0 8 0 rwobjpl 56 55259 0 47460 120 7 113 113 0 8 1 pdppl 4096 5189 0 5131 193 124 69 79 0 8 11 pvpl 32 49253 0 0 399 1 398 398 0 265 0 pmappl 248 2590 0 2563 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 577 0 162 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82c81ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82e0b828) at __mp_lock+0x159 sys/kern/kern_lock.c:150 __mp_acquire_count(ffffffff82e0b828,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 tsleep(fffffd8068c97b18,11,ffffffff828f7292,0) at tsleep+0x16f biowait(fffffd8068c97b18) at biowait+0x91 sys/kern/vfs_bio.c:1254 bwrite(fffffd8068c97b18) at bwrite+0x1fe sys/kern/vfs_bio.c:766 ffs_update(fffffd806e15d008,1) at ffs_update+0x27f sys/ufs/ffs/ffs_inode.c:111 ufs_inactive(ffff80002a27fcf8) at ufs_inactive+0x16a sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd80685eae70,ffff80002ab6f238) at VOP_INACTIVE+0xc4 sys/kern/vfs_vops.c:495 vput(fffffd80685eae70) at vput+0xaf sys/kern/vfs_subr.c:779 VOP_REMOVE(fffffd8068604290,fffffd80685eae70,ffff80002a27fe78) at VOP_REMOVE+0x124 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002ab6f238,ffffff9c,7f1b13687a90,0) at dounlinkat+0x110 sys/kern/vfs_syscalls.c:1891 end trace frame: 0xffff80002a27ffe0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82c81ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82e0b828) at __mp_lock+0x159 sys/kern/kern_lock.c:150 __mp_acquire_count(ffffffff82e0b828,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 tsleep(fffffd8068c97b18,11,ffffffff828f7292,0) at tsleep+0x16f biowait(fffffd8068c97b18) at biowait+0x91 sys/kern/vfs_bio.c:1254 bwrite(fffffd8068c97b18) at bwrite+0x1fe sys/kern/vfs_bio.c:766 ffs_update(fffffd806e15d008,1) at ffs_update+0x27f sys/ufs/ffs/ffs_inode.c:111 ufs_inactive(ffff80002a27fcf8) at ufs_inactive+0x16a sys/ufs/ufs/ufs_inode.c:84 VOP_INACTIVE(fffffd80685eae70,ffff80002ab6f238) at VOP_INACTIVE+0xc4 sys/kern/vfs_vops.c:495 vput(fffffd80685eae70) at vput+0xaf sys/kern/vfs_subr.c:779 VOP_REMOVE(fffffd8068604290,fffffd80685eae70,ffff80002a27fe78) at VOP_REMOVE+0x124 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002ab6f238,ffffff9c,7f1b13687a90,0) at dounlinkat+0x110 sys/kern/vfs_syscalls.c:1891 syscall(ffff80002a27fff0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002a27fff0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f1b13687f40, count: -16 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828d536f) at panic+0x17b sys/kern/subr_prf.c:198 vref(fffffd8008ba5298) at vref+0xc7 sys/kern/vfs_subr.c:698 namei(ffff800032b24208) at namei+0x3b2 sys/kern/vfs_lookup.c:221 vn_open(ffff800032b24208,30001,0) at vn_open+0x101 sys/kern/vfs_vnops.c:140 doopenat(ffff80002a1491f8,ffffff9c,7b43d8966680,30000,0,ffff800032b243b0) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff800032b24460) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff800032b24460) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b43d8966180, count: 7 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828d536f) at panic+0x17b sys/kern/subr_prf.c:198 vref(fffffd8008ba5298) at vref+0xc7 sys/kern/vfs_subr.c:698 namei(ffff800032b24208) at namei+0x3b2 sys/kern/vfs_lookup.c:221 vn_open(ffff800032b24208,30001,0) at vn_open+0x101 sys/kern/vfs_vnops.c:140 doopenat(ffff80002a1491f8,ffffff9c,7b43d8966680,30000,0,ffff800032b243b0) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff800032b24460) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff800032b24460) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b43d8966180, count: -8