panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *300781 48770 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832f0221) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806cd8ab20,ffff80002a786a68) at vgonel+0x663 vrecycle(fffffd806cd8ab20,ffff80002a786a68) at vrecycle+0x7c sys/kern/vfs_subr.c:1137 ufs_inactive(ffff8000365255e0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806cd8ab20,ffff80002a786a68) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806cd8ab20) at vput+0xdc sys/kern/vfs_subr.c:790 VOP_REMOVE(fffffd806c562be8,fffffd806cd8ab20,ffff800036525748) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a786a68,ffffff9c,7e193e6ac860,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff8000365258b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000365258b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e193e6acd10, 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(ffffffff832f0221) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806cd8ab20,ffff80002a786a68) at vgonel+0x663 vrecycle(fffffd806cd8ab20,ffff80002a786a68) at vrecycle+0x7c sys/kern/vfs_subr.c:1137 ufs_inactive(ffff8000365255e0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806cd8ab20,ffff80002a786a68) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806cd8ab20) at vput+0xdc sys/kern/vfs_subr.c:790 VOP_REMOVE(fffffd806c562be8,fffffd806cd8ab20,ffff800036525748) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a786a68,ffffff9c,7e193e6ac860,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff8000365258b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000365258b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e193e6acd10, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800036525420 rbx 0xfffffd806cd8ab20 rdx 0 rcx 0 rax 0xffff80002a786a68 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4e16a1107dd73490 r11 0x864217362c32241c r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff832540c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800036525410 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=300781 pid=48770 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=0xffff80002a7c62d8,0xffff80002a7c7cd8 process=0xffff8000ffff4da0 user=0xffff800036520000, vmspace=0xfffffd8070342008 estcpu=36, cpticks=100, pctcpu=0.16, user=3, sys=97, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 8145 104303 13713 0 2 0 syz-executor 5180 236150 76482 0 2 0 syz-executor 5180 484276 76482 0 2 0x4000000 syz-executor 78739 485750 53663 0 2 0 syz-executor 78739 44103 53663 0 2 0x4000000 syz-executor 506 368819 40454 -1 2 0x10 syz-executor 506 143008 40454 -1 2 0x4000010 syz-executor 57287 29339 2452 0 2 0 syz-executor 57287 206184 2452 0 3 0x4000080 fsleep syz-executor 57287 18763 2452 0 3 0x4000080 fsleep syz-executor 57287 125368 2452 0 3 0x4000080 fsleep syz-executor 93192 96668 65422 0 2 0 syz-executor 93192 115705 65422 0 3 0x4000080 fsleep syz-executor 93192 142682 65422 0 3 0x4000080 fsleep syz-executor 18121 205458 0 0 3 0x14200 acct acct 48936 5185 1 0 3 0x100083 ttyin getty 67680 354631 94495 0 3 0x82 wait syz-executor 65422 505784 94495 0 3 0x82 nanoslp syz-executor *48770 300781 94495 0 7 0x2 syz-executor 76482 184281 94495 0 3 0x82 nanoslp syz-executor 40454 347537 94495 0 3 0x82 nanoslp syz-executor 53663 504461 94495 0 3 0x82 nanoslp syz-executor 2452 298390 94495 0 3 0x82 nanoslp syz-executor 13713 392469 94495 0 2 0x2 syz-executor 94495 397873 58768 0 3 0x82 kqread syz-executor 58768 505677 51787 0 3 0x10008a sigsusp ksh 51787 435755 82598 0 3 0x98 kqread sshd-session 82598 1076 90268 0 3 0x92 kqread sshd-session 90268 64891 1 0 3 0x88 kqread sshd 13276 140415 48119 73 3 0x1100090 kqread syslogd 48119 220742 1 0 3 0x100082 sbwait syslogd 25903 195514 1 0 3 0x100080 kqread resolvd 15154 324551 0 0 3 0x14200 bored smr 91343 448607 0 0 2 0x14200 zerothread 17149 270572 0 0 3 0x14200 aiodoned aiodoned 1232 161541 0 0 3 0x14200 syncer update 69172 82648 0 0 3 0x14200 cleaner cleaner 37050 6458 0 0 3 0x14200 reaper reaper 88023 212699 0 0 3 0x14200 pgdaemon pagedaemon 19588 135542 0 0 3 0x14200 bored viomb 20116 455725 0 0 3 0x40014200 acpi0 acpi0 42060 193582 0 0 3 0x14200 bored softnet0 19966 119907 0 0 3 0x14200 bored systqmp 99288 49253 0 0 3 0x14200 bored systq 85475 461590 0 0 3 0x40014200 tmoslp softclock 90346 129311 0 0 3 0x40014200 idle0 1 303031 0 0 3 0x80082 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 10215 11064K 11612K 166960K 15777 0 pcb 17 16K 24K 166960K 1564 0 rtable 247 13K 14K 166960K 1979 0 pf 36 14K 17K 166960K 453 0 ifaddr 37 7K 9K 166960K 329 0 ifgroup 58 2K 2K 166960K 614 0 sysctl 4 1K 9K 166960K 49 0 counters 34 18K 18K 166960K 360 0 ioctlops 0 0K 4K 166960K 1293 0 iov 0 0K 34K 166960K 598 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1513 95K 95K 166960K 5277 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 13K 166960K 76 0 VM map 2 1K 1K 166960K 2 0 sem 12 508K 508K 166960K 220 0 dirhash 12 2K 2K 166960K 72 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 5892 0 sigio 0 0K 0K 166960K 116 0 proc 54 43K 83K 166960K 1691 0 subproc 72 4K 4K 166960K 273 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 807 0 in_multi 70 5K 7K 166960K 523 0 ether_multi 1 0K 0K 166960K 62 0 mrt 0 0K 0K 166960K 37 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 283 1261K 1261K 166960K 283 0 exec 0 0K 1K 166960K 1824 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 13 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 204 129K 168K 166960K 54565 0 UVM aobj 373 19K 19K 166960K 391 0 pinsyscall 32 64K 92K 166960K 7544 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 321 0 NDP 13 0K 1K 166960K 252 0 temp 96 8652K 8748K 166960K 226028 0 kqueue 7 12K 33K 166960K 1115 0 SYN cache 2 8K 16K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 902 0 900 5 2 3 3 0 8 2 rtentry 136 517 0 436 4 0 4 4 0 8 0 unpcb 144 3894 0 3884 10 4 6 6 0 8 5 syncache 336 12 0 12 2 1 1 1 0 8 1 tcpqe 32 11 0 11 2 1 1 1 0 8 1 tcpcb 736 2333 0 2329 13 6 7 7 0 8 6 arp 96 89 0 74 1 0 1 1 0 8 0 ipq 40 25 0 25 1 0 1 1 0 8 1 ipqe 40 67 0 67 1 0 1 1 0 8 1 inpcb 328 5905 0 5901 17 8 9 12 0 8 8 ip6q 72 27 0 26 2 1 1 1 0 8 0 ip6af 40 42 0 42 2 1 1 1 0 8 1 nd6 112 106 0 90 1 0 1 1 0 8 0 pkpcb 40 108 0 108 2 1 1 1 0 8 1 kcovpl 48 30 0 22 1 0 1 1 0 8 0 mppekey 1024 4 0 4 1 1 0 1 0 8 0 ppxss 1072 250 0 250 2 1 1 1 0 8 1 pppxif 1384 25 0 25 2 1 1 1 0 8 1 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 1 1 0 1 1 0 8 0 pfstate 384 2 0 0 1 0 1 1 0 8 0 pfrule 1344 3 0 3 1 1 0 1 0 8 0 rttmr 136 4 0 4 1 1 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 2189 0 1841 42 11 31 31 0 8 4 art_table 40 2194 0 1841 5 0 5 5 0 8 0 art_node 32 504 0 431 1 0 1 1 0 8 0 sysvmsgpl 40 23 0 14 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 214 0 204 1 0 1 1 0 8 0 shmpl 112 388 0 18 11 0 11 11 0 8 0 dirhash 1024 57 0 40 3 0 3 3 0 8 0 dino2pl 256 11947 0 10414 97 0 97 97 0 8 0 ffsino 256 11947 0 10414 97 0 97 97 0 8 0 nchpl 144 20135 0 19513 64 39 25 64 0 8 0 rtmask 32 39 0 39 2 1 1 1 0 8 1 vnodes 216 12517 0 0 696 0 696 696 0 8 0 namei 1024 71035 0 71034 3 1 2 2 0 8 1 kstatmem 264 378 0 352 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 27 0 27 2 1 1 1 0 8 1 scxspl 216 67488 0 67488 15 7 8 8 1 8 8 plimitpl 152 1522 0 1506 1 0 1 1 0 8 0 sigapl 424 6174 0 6134 9 2 7 8 0 8 0 knotepl 120 513233 0 513202 73 61 12 20 0 8 8 kqueuepl 184 2100 0 2092 6 2 4 4 0 8 3 pipepl 304 876 0 848 10 2 8 8 0 8 5 fdescpl 448 6088 0 6062 5 1 4 5 0 8 0 filepl 120 40559 0 40361 16 4 12 13 0 8 4 lockfpl 104 2309 0 2308 1 0 1 1 0 8 0 lockfspl 48 824 0 823 1 0 1 1 0 8 0 sessionpl 144 56 0 49 1 0 1 1 0 8 0 pgrppl 48 145 0 130 1 0 1 1 0 8 0 ucredpl 104 6755 0 6745 1 0 1 1 0 8 0 zombiepl 144 8929 0 8928 1 0 1 1 0 8 0 processpl 1152 6174 0 6134 5 0 5 5 0 8 0 procpl 664 16044 0 15996 9 2 7 7 0 8 1 sosppl 176 29 0 29 2 1 1 1 0 8 1 sockpl 552 11104 0 11088 21 11 10 12 0 8 8 mcl64k 65536 809 0 809 5 3 2 3 0 8 2 mcl16k 16384 10 0 10 2 1 1 1 0 8 1 mcl12k 12288 8 0 7 2 1 1 1 0 8 0 mcl9k 9216 9 0 9 2 1 1 1 0 8 1 mcl8k 8192 75 0 75 2 1 1 1 0 8 1 mcl4k 4096 10724 0 10672 15 7 8 14 0 8 1 mcl2k2 2112 2 0 2 1 1 0 1 0 8 0 mcl2k 2048 8208 0 8205 9 4 5 7 0 8 4 mtagpl 96 15 0 15 2 1 1 1 0 8 1 mbufpl 256 73902 0 73514 429 378 51 308 0 8 8 bufpl 280 25374 0 19152 445 0 445 445 0 8 0 anonpl 24 832103 0 824278 85 0 85 85 0 187 12 amapchunkpl 152 194869 0 194347 50 15 35 38 0 158 11 amappl16 200 15417 0 15157 65 35 30 30 0 8 3 amappl15 192 10 0 10 2 1 1 1 0 8 1 amappl14 184 5 0 5 2 1 1 1 0 8 1 amappl13 176 670 0 669 1 0 1 1 0 8 0 amappl12 168 6613 0 6582 2 0 2 2 0 8 0 amappl11 160 62 0 62 1 1 0 1 0 8 0 amappl10 152 47 0 42 1 0 1 1 0 8 0 amappl9 144 254 0 253 1 0 1 1 0 8 0 amappl8 136 35 0 32 1 0 1 1 0 8 0 amappl7 128 215 0 213 1 0 1 1 0 8 0 amappl6 120 552 0 543 1 0 1 1 0 8 0 amappl5 112 76 0 71 1 0 1 1 0 8 0 amappl4 104 545 0 523 1 0 1 1 0 8 0 amappl3 96 34227 0 34147 3 0 3 3 0 8 0 amappl2 88 6183 0 6130 2 0 2 2 0 8 0 amappl1 80 35019 0 34571 14 2 12 13 0 8 1 amappl 88 52410 0 52257 5 0 5 5 0 92 0 uvmvnodes 80 12517 0 0 256 0 256 256 0 8 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma32768 32768 3 0 3 2 1 1 1 0 8 1 dma16384 16384 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 5 0 5 2 1 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 9 0 9 2 1 1 1 0 8 1 dma128 128 262 0 262 2 1 1 1 0 8 1 dma64 64 11 0 11 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 84 0 83 1 0 1 1 0 8 0 aobjpl 72 390 0 18 7 0 7 7 0 8 0 uaddrrnd 24 6088 0 6062 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6088 0 6062 1 0 1 1 0 8 0 vmmpekpl 168 45393 0 45340 3 0 3 3 0 8 0 vmmpepl 168 384118 0 382337 101 5 96 96 0 357 9 vmsppl 368 6087 0 6062 4 1 3 4 0 8 0 rwobjpl 40 103881 0 90042 141 0 141 141 0 8 0 pdppl 4096 12182 0 12124 212 152 60 78 0 8 2 pvpl 32 2535106 0 2522389 174 9 165 165 0 265 24 pmappl 216 6087 0 6062 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 956 0 572 19 0 19 19 0 8 4 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832f0221) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806cd8ab20,ffff80002a786a68) at vgonel+0x663 vrecycle(fffffd806cd8ab20,ffff80002a786a68) at vrecycle+0x7c sys/kern/vfs_subr.c:1137 ufs_inactive(ffff8000365255e0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806cd8ab20,ffff80002a786a68) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806cd8ab20) at vput+0xdc sys/kern/vfs_subr.c:790 VOP_REMOVE(fffffd806c562be8,fffffd806cd8ab20,ffff800036525748) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a786a68,ffffff9c,7e193e6ac860,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff8000365258b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000365258b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e193e6acd10, 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(ffffffff832f0221) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806cd8ab20,ffff80002a786a68) at vgonel+0x663 vrecycle(fffffd806cd8ab20,ffff80002a786a68) at vrecycle+0x7c sys/kern/vfs_subr.c:1137 ufs_inactive(ffff8000365255e0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806cd8ab20,ffff80002a786a68) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806cd8ab20) at vput+0xdc sys/kern/vfs_subr.c:790 VOP_REMOVE(fffffd806c562be8,fffffd806cd8ab20,ffff800036525748) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a786a68,ffffff9c,7e193e6ac860,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff8000365258b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000365258b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e193e6acd10, count: -11