#panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *443920 16599 0 0x8000002 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82fa5b8b) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8062df9960,ffff80003766e540) at vgonel+0x681 sys/kern/vfs_subr.c:1200 vrecycle(fffffd8062df9960,ffff80003766e540) at vrecycle+0x7c sys/kern/vfs_subr.c:1126 ufs_inactive(ffff800037675428) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8062df9960,ffff80003766e540) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd8062df9960) at vput+0xdc sys/kern/vfs_subr.c:779 VOP_REMOVE(fffffd8062df9528,fffffd8062df9960,ffff8000376755a8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80003766e540,ffffff9c,76b0bdf98860,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff800037675720) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b0bdf98d10, count: 4 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: missing alias ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82fa5b8b) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8062df9960,ffff80003766e540) at vgonel+0x681 sys/kern/vfs_subr.c:1200 vrecycle(fffffd8062df9960,ffff80003766e540) at vrecycle+0x7c sys/kern/vfs_subr.c:1126 ufs_inactive(ffff800037675428) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8062df9960,ffff80003766e540) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd8062df9960) at vput+0xdc sys/kern/vfs_subr.c:779 VOP_REMOVE(fffffd8062df9528,fffffd8062df9960,ffff8000376755a8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80003766e540,ffffff9c,76b0bdf98860,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff800037675720) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b0bdf98d10, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800037675270 rbx 0 rdx 0 rcx 0 rax 0xffff80003766e540 r8 0x101010101010101 r9 0x8080808080808080 r10 0x655268312c1df2f6 r11 0x1205dcb5b4568bd8 r12 0 r13 0x800 r14 0 r15 0x1 rip 0xffffffff82d36cc5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037675260 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=443920 pid=16599 tcnt=1 stat=onproc flags process=8000002 proc=0 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003766ecd8,0xffff80003766e2c8 process=0xffff80003760e458 user=0xffff800037670000, vmspace=0xfffffd80667de170 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 63485 278442 77052 0 2 0x8001044 syz-executor 14462 168722 19277 0 2 0x8000000 syz-executor 14462 428105 19277 0 3 0xc000080 fsleep syz-executor 14462 50943 19277 0 2 0xc000000 syz-executor 62754 50906 30736 0 2 0x8000002 arp 10846 352922 99563 0 2 0x8000010 syz-executor 10846 177886 99563 0 2 0xc000010 syz-executor 10846 373732 99563 0 3 0xc000090 fsleep syz-executor 22467 452609 54234 -1 2 0x8000010 syz-executor 22467 226906 54234 -1 2 0xc000010 syz-executor 22467 52569 54234 -1 3 0xc000090 fsleep syz-executor 30736 189750 91770 0 3 0x810008a sigsusp sh 77052 362828 11596 0 3 0x8000082 ppwait syz-executor 91770 450478 11596 0 3 0x8000082 wait syz-executor 44350 334370 11596 0 2 0x8000002 syz-executor 54234 205450 11596 0 3 0x8000082 nanoslp syz-executor *16599 443920 11596 0 7 0x8000002 syz-executor 68382 523356 11596 0 3 0x8000002 biowait syz-executor 99563 202170 11596 0 3 0x8000082 nanoslp syz-executor 19277 173029 11596 0 3 0x8000082 nanoslp syz-executor 20236 475825 0 0 3 0x14200 acct acct 38017 209851 0 0 3 0x14280 nfsidl nfsio 15994 456592 0 0 3 0x14280 nfsidl nfsio 29931 116485 0 0 3 0x14280 nfsidl nfsio 35027 67977 0 0 3 0x14280 nfsidl nfsio 57847 194318 0 0 3 0x14280 nfsidl nfsio 54571 349985 0 0 3 0x14280 nfsidl nfsio 27309 180920 0 0 3 0x14280 nfsidl nfsio 69440 361985 0 0 3 0x14280 nfsidl nfsio 45758 139866 0 0 3 0x14280 nfsidl nfsio 30633 47976 0 0 3 0x14280 nfsidl nfsio 89812 197451 0 0 3 0x14280 nfsidl nfsio 62092 270302 0 0 3 0x14280 nfsidl nfsio 70354 12062 0 0 3 0x14280 nfsidl nfsio 62162 174282 0 0 3 0x14280 nfsidl nfsio 70112 217011 0 0 3 0x14280 nfsidl nfsio 35541 505531 0 0 3 0x14280 nfsidl nfsio 78732 229780 0 0 3 0x14280 nfsidl nfsio 96038 359186 0 0 3 0x14280 nfsidl nfsio 57407 511401 0 0 3 0x14280 nfsidl nfsio 55793 507529 0 0 3 0x14280 nfsidl nfsio 52526 522837 1 0 3 0x18100083 ttyopn getty 26705 464157 0 0 3 0x14200 bored sosplice 11596 270392 41466 0 3 0x8000082 kqread syz-executor 41466 67348 66055 0 3 0x810008a sigsusp ksh 66055 64796 85005 0 3 0x18000098 kqread sshd-session 85005 24071 70386 0 3 0x18000092 kqread sshd-session 70386 91772 1 0 3 0x18000088 kqread sshd 95011 481658 38016 73 2 0x19100010 syslogd 38016 83923 1 0 3 0x18100082 sbwait syslogd 71283 207633 1 0 3 0x18100080 kqread resolvd 30698 519813 22673 77 3 0x18100092 kqread dhcpleased 21920 291811 22673 77 3 0x18100092 kqread dhcpleased 22673 89719 1 0 3 0x18000080 kqread dhcpleased 1578 92941 0 0 3 0x14200 bored smr 39834 409158 0 0 2 0x14200 zerothread 29284 369163 0 0 3 0x14200 aiodoned aiodoned 81072 324747 0 0 3 0x14200 syncer update 49450 342467 0 0 3 0x14200 cleaner cleaner 48261 342053 0 0 3 0x14200 reaper reaper 48205 20644 0 0 3 0x14200 pgdaemon pagedaemon 74369 237235 0 0 3 0x14200 bored viomb 58868 430047 0 0 3 0x40014200 acpi0 acpi0 694 175648 0 0 3 0x14200 bored softnet3 82291 473368 0 0 3 0x14200 bored softnet2 88586 254588 0 0 3 0x14200 bored softnet1 30268 200571 0 0 2 0x14200 softnet0 16791 147116 0 0 3 0x14200 bored systqmp 21433 423613 0 0 3 0x14200 bored systq 58331 270100 0 0 3 0x40014200 tmoslp softclock 37143 434361 0 0 3 0x40014200 idle0 1 299569 0 0 3 0x8000082 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 10193 10160K 10679K 166960K 13157 0 pcb 17 12K 12K 166960K 222 0 rtable 191 8K 10K 166960K 1898 0 pf 36 14K 17K 166960K 182 0 ifaddr 40 7K 8K 166960K 256 0 ifgroup 58 2K 2K 166960K 284 0 sysctl 2 0K 1K 166960K 6 0 counters 32 17K 17K 166960K 92 0 ioctlops 0 0K 4K 166960K 196 0 iov 0 0K 16K 166960K 101 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1380 87K 87K 166960K 3028 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 35 0 VM map 2 1K 1K 166960K 2 0 sem 16 11K 20K 166960K 49 0 dirhash 12 2K 2K 166960K 99 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 93K 166960K 2585 0 sigio 0 0K 0K 166960K 21 0 proc 59 59K 116K 166960K 1868 0 subproc 104 6K 6K 166960K 731 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 193 0 in_multi 79 5K 7K 166960K 673 0 ether_multi 1 0K 0K 166960K 18 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 1 0K 1K 166960K 1081 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 193 71K 90K 166960K 21892 0 UVM aobj 17 2K 2K 166960K 19 0 pinsyscall 38 76K 100K 166960K 4814 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 77 0 NDP 13 0K 2K 166960K 181 0 temp 76 6808K 6936K 166960K 40202 0 kqueue 15 24K 30K 166960K 189 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 120 234 0 231 1 0 1 1 0 8 0 rtentry 112 664 0 582 4 1 3 4 0 8 0 unpcb 144 996 0 975 4 1 3 3 0 8 2 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 543 0 539 9 1 8 8 0 8 7 arp 88 126 0 110 1 0 1 1 0 8 0 ipq 40 6 0 5 1 0 1 1 0 8 0 ipqe 40 103 0 102 1 0 1 1 0 8 0 inpcb 336 1654 0 1647 7 0 7 7 0 8 6 nd6 104 170 0 152 1 0 1 1 0 8 0 pkpcb 40 18 0 18 2 1 1 1 0 8 1 kcovpl 48 56 0 48 1 0 1 1 0 8 0 ppxss 1072 8 0 8 2 1 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfqueue 264 3 0 2 1 0 1 1 0 8 0 pfstkey 128 3 0 3 2 1 1 1 0 8 1 pfstate 344 2 0 2 2 1 1 1 0 8 1 pfrule 1344 10 0 8 2 1 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2567 0 2206 31 2 29 30 0 8 3 art_table 32 2568 0 2206 4 0 4 4 0 8 0 art_node 16 661 0 588 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 18 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 40 0 26 1 0 1 1 0 8 0 shmpl 112 16 0 2 1 0 1 1 0 8 0 dirhash 1024 77 0 60 3 0 3 3 0 8 0 dino2pl 256 4592 0 3007 100 0 100 100 0 8 0 ffsino 240 4592 0 3007 94 0 94 94 0 8 0 nchpl 144 7119 0 6527 65 42 23 63 0 8 0 uvmvnodes 80 5950 0 0 122 0 122 122 0 8 0 vnodes 216 5951 0 0 331 0 331 331 0 8 0 namei 1024 25251 0 25247 2 1 1 2 0 8 0 vmpool 664 3 0 3 1 1 0 1 0 8 0 kstatmem 264 146 0 120 2 0 2 2 0 8 0 scxspl 216 45000 0 44999 10 7 3 8 1 8 2 plimitpl 152 316 0 300 1 0 1 1 0 8 0 sigapl 424 2786 0 2720 8 0 8 8 0 8 0 futexpl 64 21890 0 21887 1 0 1 1 0 8 0 knotepl 120 69266 0 69211 10 1 9 9 0 8 7 kqueuepl 184 343 0 332 1 0 1 1 0 8 0 pipepl 288 355 0 328 3 0 3 3 0 8 0 fdescpl 432 2748 0 2720 6 2 4 5 0 8 0 filepl 120 11684 0 11433 13 1 12 12 0 8 4 lockfpl 104 495 0 493 1 0 1 1 0 8 0 lockfspl 48 216 0 214 1 0 1 1 0 8 0 sessionpl 144 70 0 62 1 0 1 1 0 8 0 pgrppl 48 143 0 127 1 0 1 1 0 8 0 ucredpl 104 1550 0 1536 1 0 1 1 0 8 0 zombiepl 144 3154 0 3154 2 1 1 1 0 8 1 processpl 1088 2786 0 2720 5 0 5 5 0 8 0 procpl 648 5165 0 5093 9 1 8 8 0 8 1 sosppl 168 11 0 11 2 1 1 1 0 8 1 sockpl 504 2917 0 2886 18 6 12 17 0 8 8 mcl64k 65536 1123 0 1123 1 0 1 1 0 8 1 mcl16k 16384 405 0 405 2 1 1 1 0 8 1 mcl12k 12288 256 0 256 2 1 1 1 0 8 1 mcl9k 9216 65 0 65 2 1 1 1 0 8 1 mcl8k 8192 434 0 434 2 1 1 1 0 8 1 mcl4k 4096 131 0 131 2 1 1 1 0 8 1 mcl2k2 2112 4 0 4 2 1 1 1 0 8 1 mcl2k 2048 10686 0 10584 27 11 16 26 0 8 1 mtagpl 96 58 0 58 2 1 1 1 0 8 1 mbufpl 256 35772 0 35580 30 12 18 28 0 8 4 bufpl 280 12005 0 4635 527 0 527 527 0 8 0 anonpl 24 398829 0 395881 125 27 98 98 0 187 66 amapchunkpl 152 71169 0 70794 50 18 32 34 0 158 13 amappl16 200 8349 0 8339 50 42 8 27 0 8 7 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 219 0 209 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 4097 0 4070 3 1 2 3 0 8 0 amappl11 160 51 0 41 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 129 0 129 1 1 0 1 0 8 0 amappl8 136 17 0 16 1 0 1 1 0 8 0 amappl7 128 197 0 186 1 0 1 1 0 8 0 amappl6 120 638 0 635 1 0 1 1 0 8 0 amappl5 112 315 0 307 1 0 1 1 0 8 0 amappl4 104 424 0 408 1 0 1 1 0 8 0 amappl3 96 14691 0 14604 5 1 4 4 0 8 1 amappl2 88 1255 0 1197 2 0 2 2 0 8 0 amappl1 80 17652 0 17111 14 2 12 14 0 8 0 amappl 88 21137 0 20999 6 1 5 5 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 41 0 41 2 1 1 1 0 8 1 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 18 0 2 1 0 1 1 0 8 0 uaddrrnd 24 2751 0 2723 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2751 0 2723 1 0 1 1 0 8 0 vmmpekpl 168 19196 0 19143 3 0 3 3 0 8 0 vmmpepl 168 168570 0 166976 117 19 98 98 0 357 20 vmsppl 344 2750 0 2723 4 1 3 4 0 8 0 rwobjpl 24 51298 0 44493 42 0 42 42 0 8 0 pdppl 4096 5508 0 5446 170 100 70 80 0 8 8 pvpl 32 1372493 0 1363633 427 143 284 284 0 265 187 pmappl 216 2750 0 2723 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 513 0 139 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:437 panic(ffffffff82fa5b8b) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8062df9960,ffff80003766e540) at vgonel+0x681 sys/kern/vfs_subr.c:1200 vrecycle(fffffd8062df9960,ffff80003766e540) at vrecycle+0x7c sys/kern/vfs_subr.c:1126 ufs_inactive(ffff800037675428) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8062df9960,ffff80003766e540) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd8062df9960) at vput+0xdc sys/kern/vfs_subr.c:779 VOP_REMOVE(fffffd8062df9528,fffffd8062df9960,ffff8000376755a8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80003766e540,ffffff9c,76b0bdf98860,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff800037675720) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b0bdf98d10, count: -11 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82fa5b8b) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8062df9960,ffff80003766e540) at vgonel+0x681 sys/kern/vfs_subr.c:1200 vrecycle(fffffd8062df9960,ffff80003766e540) at vrecycle+0x7c sys/kern/vfs_subr.c:1126 ufs_inactive(ffff800037675428) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8062df9960,ffff80003766e540) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd8062df9960) at vput+0xdc sys/kern/vfs_subr.c:779 VOP_REMOVE(fffffd8062df9528,fffffd8062df9960,ffff8000376755a8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80003766e540,ffffff9c,76b0bdf98860,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff800037675720) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b0bdf98d10, count: -11