panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *240166 73648 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832d0dd7) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80676cce70,ffff80002a81b770) at vgonel+0x663 vrecycle(fffffd80676cce70,ffff80002a81b770) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a8a7130) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80676cce70,ffff80002a81b770) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd80676cce70) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd806ce606d0,fffffd80676cce70,ffff80002a8a7298) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a81b770,ffffff9c,741e1b0919b0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8a7400) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a7400) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x741e1b091e60, 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:438 panic(ffffffff832d0dd7) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80676cce70,ffff80002a81b770) at vgonel+0x663 vrecycle(fffffd80676cce70,ffff80002a81b770) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a8a7130) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80676cce70,ffff80002a81b770) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd80676cce70) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd806ce606d0,fffffd80676cce70,ffff80002a8a7298) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a81b770,ffffff9c,741e1b0919b0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8a7400) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a7400) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x741e1b091e60, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a8a6f70 rbx 0xfffffd80676cce70 rdx 0 rcx 0 rax 0xffff80002a81b770 r8 0x101010101010101 r9 0x8080808080808080 r10 0x73fcc9b881efa0d1 r11 0x787e9dc5ef808754 r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff824b5925 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a8a6f60 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=240166 pid=73648 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a81ba08,0xffff80002a81b250 process=0xffff8000ffff8910 user=0xffff80002a8a2000, vmspace=0xfffffd80732095c8 estcpu=36, cpticks=9, pctcpu=0.0, user=2, sys=6, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 16695 415503 8686 0 2 0 syz-executor 16695 33429 8686 0 3 0x4000080 fsleep syz-executor 71519 345449 17791 0 2 0 syz-executor 71519 472022 17791 0 3 0x4000080 bell syz-executor 18591 330862 26159 0 2 0 syz-executor 18591 265339 26159 0 3 0x4000080 fsleep syz-executor 18591 522864 26159 0 3 0x4000080 fsleep syz-executor 47343 308918 46826 0 2 0 syz-executor 47343 503200 46826 0 3 0x4000080 fsleep syz-executor 47005 495358 50157 0 2 0x10 syz-executor 47005 297047 50157 0 3 0x4000090 fsleep syz-executor 59054 365448 14569 0 3 0x80 nanoslp syz-executor 59054 72456 14569 0 3 0x4000080 kqread syz-executor 59054 358421 14569 0 3 0x4000080 fsleep syz-executor 15610 75971 0 0 3 0x14280 nfsidl nfsio 3117 42073 0 0 3 0x14280 nfsidl nfsio 51664 497776 0 0 3 0x14280 nfsidl nfsio 61895 257723 0 0 3 0x14280 nfsidl nfsio 50841 74569 0 0 3 0x14280 nfsidl nfsio 3059 135140 0 0 3 0x14280 nfsidl nfsio 278 455520 0 0 3 0x14280 nfsidl nfsio 92783 468306 0 0 3 0x14280 nfsidl nfsio 10579 21638 0 0 3 0x14280 nfsidl nfsio 52968 125596 0 0 3 0x14280 nfsidl nfsio 61980 73150 0 0 3 0x14280 nfsidl nfsio 61780 253182 0 0 3 0x14280 nfsidl nfsio 62661 345243 0 0 3 0x14280 nfsidl nfsio 44131 176027 0 0 3 0x14280 nfsidl nfsio 43889 128132 0 0 3 0x14280 nfsidl nfsio 9308 120758 0 0 3 0x14280 nfsidl nfsio 22166 329763 0 0 3 0x14280 nfsidl nfsio 19059 440381 0 0 3 0x14280 nfsidl nfsio 95295 147337 0 0 3 0x14280 nfsidl nfsio 51125 449350 0 0 3 0x14280 nfsidl nfsio 28079 328084 0 0 3 0x14200 bored sosplice 26159 390229 63549 0 3 0x82 nanoslp syz-executor 7855 141193 63549 0 2 0x2 syz-executor 14569 520838 63549 0 3 0x82 nanoslp syz-executor 8686 409693 63549 0 3 0x82 nanoslp syz-executor *73648 240166 63549 0 7 0x2 syz-executor 50157 189960 63549 0 3 0x82 nanoslp syz-executor 17791 504947 63549 0 3 0x82 nanoslp syz-executor 46826 511639 63549 0 3 0x82 nanoslp syz-executor 63549 207151 47165 0 3 0x82 kqread syz-executor 47165 140985 90784 0 3 0x10008a sigsusp ksh 90784 485357 81083 0 3 0x98 kqread sshd-session 81083 127624 22575 0 3 0x92 kqread sshd-session 16910 160285 1 0 3 0x100083 ttyopn getty 22575 333887 1 0 3 0x88 kqread sshd 84166 403406 36170 73 3 0x1100090 kqread syslogd 36170 349538 1 0 3 0x100082 sbwait syslogd 29822 221685 1 0 3 0x100080 kqread resolvd 6585 340763 88715 77 3 0x100092 kqread dhcpleased 4919 437458 88715 77 3 0x100092 kqread dhcpleased 88715 426675 1 0 3 0x80 kqread dhcpleased 75410 390476 0 0 3 0x14200 bored smr 71559 505494 0 0 2 0x14200 zerothread 16506 513757 0 0 3 0x14200 aiodoned aiodoned 70202 100101 0 0 3 0x14200 syncer update 60562 487570 0 0 3 0x14200 cleaner cleaner 51861 354017 0 0 3 0x14200 reaper reaper 51335 397543 0 0 3 0x14200 pgdaemon pagedaemon 69629 35630 0 0 3 0x14200 bored viomb 37914 303851 0 0 3 0x40014200 acpi0 acpi0 74262 329314 0 0 3 0x14200 bored softnet7 56209 116851 0 0 3 0x14200 bored softnet6 49603 432400 0 0 3 0x14200 bored softnet5 74137 1676 0 0 3 0x14200 bored softnet4 74285 402642 0 0 3 0x14200 bored softnet3 78094 323176 0 0 3 0x14200 bored softnet2 85659 37244 0 0 3 0x14200 bored softnet1 89313 311425 0 0 3 0x14200 bored softnet0 18169 117227 0 0 3 0x14200 bored systqmp 106 486291 0 0 3 0x14200 bored systq 52658 387122 0 0 3 0x40014200 tmoslp softclock 65044 83227 0 0 3 0x40014200 idle0 1 184287 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 10187 11051K 11339K 166960K 11978 0 pcb 17 12K 12K 166960K 117 0 rtable 163 7K 9K 166960K 367 0 pf 28 12K 19K 166960K 92 0 ifaddr 32 5K 7K 166960K 70 0 ifgroup 46 2K 2K 166960K 102 0 sysctl 4 1K 9K 166960K 13 0 counters 31 17K 18K 166960K 58 0 ioctlops 0 0K 4K 166960K 110 0 iov 0 0K 28K 166960K 35 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1345 85K 85K 166960K 1824 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 3 1K 1K 166960K 3 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 643 0 sigio 0 0K 0K 166960K 11 0 proc 61 59K 116K 166960K 536 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 73 0 in_multi 62 4K 7K 166960K 127 0 ether_multi 1 0K 0K 166960K 6 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 384 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 220 151K 169K 166960K 6999 0 UVM aobj 16 4K 4K 166960K 16 0 pinsyscall 37 74K 96K 166960K 1649 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 37 0 NDP 10 0K 2K 166960K 44 0 temp 76 8644K 8768K 166960K 32781 0 kqueue 13 20K 28K 166960K 119 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 79 0 76 1 0 1 1 0 8 0 rtentry 136 117 0 58 4 0 4 4 0 8 0 unpcb 144 362 0 343 4 3 1 4 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 338 0 334 13 6 7 7 0 8 6 arp 88 13 0 5 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 328 878 0 870 24 15 9 13 0 8 7 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 104 17 0 8 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 20 0 20 2 1 1 1 0 8 1 pppxif 1384 5 0 5 2 1 1 1 0 8 1 pfosfp 40 2 0 0 1 0 1 1 0 8 0 pfosfpen 112 2 0 0 1 0 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfrule 1344 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 4 0 1 4 1 3 4 0 8 0 art_heap4 256 508 0 213 29 7 22 29 0 8 0 art_table 40 512 0 214 5 0 5 5 0 8 0 art_node 32 116 0 64 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 13 0 0 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2590 0 1101 95 0 95 95 0 8 0 ffsino 256 2590 0 1101 95 0 95 95 0 8 0 nchpl 144 3458 0 1778 63 0 63 63 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 uvmvnodes 80 2888 0 0 59 0 59 59 0 8 0 vnodes 216 2888 0 0 161 0 161 161 0 8 0 namei 1024 11250 0 11249 3 2 1 2 0 8 0 kstatmem 264 56 0 36 3 1 2 3 0 8 0 scsiplug 72 8 0 8 2 1 1 1 0 8 1 scxspl 216 16438 0 16438 8 7 1 8 1 8 1 plimitpl 152 202 0 185 1 0 1 1 0 8 0 sigapl 424 922 0 853 9 1 8 8 0 8 0 knotepl 120 53264 0 53217 10 8 2 10 0 8 0 kqueuepl 184 194 0 184 1 0 1 1 0 8 0 pipepl 304 267 0 240 8 5 3 8 0 8 0 fdescpl 448 881 0 853 5 1 4 5 0 8 0 filepl 120 5274 0 5058 16 5 11 13 0 8 3 lockfpl 104 208 0 206 1 0 1 1 0 8 0 lockfspl 48 89 0 87 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 33 0 17 1 0 1 1 0 8 0 ucredpl 104 816 0 804 1 0 1 1 0 8 0 zombiepl 144 905 0 905 2 1 1 1 0 8 1 processpl 1152 922 0 853 7 1 6 6 0 8 0 procpl 664 1700 0 1623 8 0 8 8 0 8 0 sosppl 168 3 0 3 2 1 1 1 0 8 1 sockpl 552 1375 0 1345 25 15 10 16 0 8 7 mcl64k 65536 139 0 139 2 1 1 1 0 8 1 mcl16k 16384 5 0 5 1 1 0 1 0 8 0 mcl12k 12288 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 8 0 8 1 1 0 1 0 8 0 mcl4k 4096 3114 0 3065 15 8 7 15 0 8 0 mcl2k 2048 1024 0 1022 3 2 1 3 0 8 0 mtagpl 96 9 0 6 1 0 1 1 0 8 0 mbufpl 256 40804 0 40688 13 0 13 13 0 8 1 bufpl 280 7655 0 1427 446 0 446 446 0 8 0 anonpl 24 139437 0 135582 62 10 52 52 0 187 12 amapchunkpl 152 22786 0 22302 32 7 25 28 0 158 3 amappl16 200 2039 0 2005 24 8 16 16 0 8 8 amappl14 184 100 0 90 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 0 1 1 0 8 1 amappl12 168 1490 0 1462 3 1 2 3 0 8 0 amappl11 160 43 0 32 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 255 0 255 1 1 0 1 0 8 0 amappl8 136 15 0 13 1 0 1 1 0 8 0 amappl7 128 97 0 86 1 0 1 1 0 8 0 amappl6 120 165 0 162 1 0 1 1 0 8 0 amappl5 112 111 0 104 1 0 1 1 0 8 0 amappl4 104 258 0 243 1 0 1 1 0 8 0 amappl3 96 4456 0 4353 4 0 4 4 0 8 1 amappl2 88 606 0 551 2 0 2 2 0 8 0 amappl1 80 9853 0 9306 13 1 12 13 0 8 0 amappl 88 6265 0 6110 5 0 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 6 0 6 1 1 0 1 0 8 0 dma128 128 256 0 256 2 1 1 1 0 8 1 dma64 64 7 0 7 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 15 0 0 1 0 1 1 0 8 0 uaddrrnd 24 881 0 853 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 881 0 853 1 0 1 1 0 8 0 vmmpekpl 168 8719 0 8684 2 0 2 2 0 8 0 vmmpepl 168 59101 0 57294 108 11 97 97 0 357 9 vmsppl 368 880 0 853 4 1 3 4 0 8 0 rwobjpl 40 19788 0 16039 40 0 40 40 0 8 1 pdppl 4096 1768 0 1706 102 36 66 82 0 8 4 pvpl 32 389512 0 380163 137 23 114 122 0 265 17 pmappl 216 880 0 853 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 392 0 70 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(ffffffff832d0dd7) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80676cce70,ffff80002a81b770) at vgonel+0x663 vrecycle(fffffd80676cce70,ffff80002a81b770) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a8a7130) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80676cce70,ffff80002a81b770) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd80676cce70) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd806ce606d0,fffffd80676cce70,ffff80002a8a7298) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a81b770,ffffff9c,741e1b0919b0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8a7400) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a7400) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x741e1b091e60, count: -11 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832d0dd7) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80676cce70,ffff80002a81b770) at vgonel+0x663 vrecycle(fffffd80676cce70,ffff80002a81b770) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a8a7130) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80676cce70,ffff80002a81b770) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd80676cce70) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd806ce606d0,fffffd80676cce70,ffff80002a8a7298) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a81b770,ffffff9c,741e1b0919b0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8a7400) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a7400) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x741e1b091e60, count: -11