panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *502534 72131 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82fb898a) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8060160d00,ffff80002a4b07a8) at vgonel+0x681 sys/kern/vfs_subr.c:1202 vrecycle(fffffd8060160d00,ffff80002a4b07a8) at vrecycle+0x7c sys/kern/vfs_subr.c:1128 ufs_inactive(ffff80002a57b128) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8060160d00,ffff80002a4b07a8) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd8060160d00) at vput+0xdc sys/kern/vfs_subr.c:781 VOP_REMOVE(fffffd806bdfcb30,fffffd8060160d00,ffff80002a57b2a8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a4b07a8,ffffff9c,749f16120930,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff80002a57b420) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x749f16120de0, 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(ffffffff82fb898a) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8060160d00,ffff80002a4b07a8) at vgonel+0x681 sys/kern/vfs_subr.c:1202 vrecycle(fffffd8060160d00,ffff80002a4b07a8) at vrecycle+0x7c sys/kern/vfs_subr.c:1128 ufs_inactive(ffff80002a57b128) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8060160d00,ffff80002a4b07a8) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd8060160d00) at vput+0xdc sys/kern/vfs_subr.c:781 VOP_REMOVE(fffffd806bdfcb30,fffffd8060160d00,ffff80002a57b2a8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a4b07a8,ffffff9c,749f16120930,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff80002a57b420) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x749f16120de0, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a57af70 rbx 0 rdx 0 rcx 0 rax 0xffff80002a4b07a8 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd05b635e6eaa9856 r11 0xeae4f52206818973 r12 0 r13 0x800 r14 0 r15 0x1 rip 0xffffffff81e543d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a57af60 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=502534 pid=72131 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=0xffff80002a4b11c8,0xffff80002a4c27c0 process=0xffff8000ffffaf28 user=0xffff80002a576000, vmspace=0xfffffd8074bcd588 estcpu=36, cpticks=0, pctcpu=0.0, user=2, sys=81, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 40972 159423 77873 0 3 0 futex syz-executor 40972 232735 77873 0 2 0x4000000 syz-executor 83205 10964 87436 0 2 0 syz-executor 83205 130830 87436 0 3 0x4000000 futex syz-executor 84066 43169 43528 0 3 0 vmmaplk syz-executor 84066 449709 43528 0 3 0x4000080 fsleep syz-executor 84066 306580 43528 0 2 0x4000000 syz-executor 43954 443412 25880 0 2 0 syz-executor 43954 43280 25880 0 2 0x4000000 syz-executor 43954 138475 25880 0 2 0x4000000 syz-executor 43954 39800 25880 0 2 0x4000000 syz-executor 11550 281423 18077 0 2 0 syz-executor 11550 87626 18077 0 3 0x4000080 kqread syz-executor 11550 358835 18077 0 2 0x4000000 syz-executor 11550 458088 18077 0 3 0x4000080 fsleep syz-executor 11550 516965 18077 0 3 0x4000080 fsleep syz-executor 57562 435065 0 0 3 0x14280 nfsidl nfsio 97229 163328 0 0 3 0x14280 nfsidl nfsio 89175 30310 0 0 3 0x14280 nfsidl nfsio 48204 447621 0 0 3 0x14280 nfsidl nfsio 55644 295630 0 0 3 0x14280 nfsidl nfsio 41243 393072 0 0 3 0x14280 nfsidl nfsio 62885 247091 0 0 3 0x14280 nfsidl nfsio 70933 415546 0 0 3 0x14280 nfsidl nfsio 40396 53385 0 0 3 0x14280 nfsidl nfsio 75932 427893 0 0 3 0x14280 nfsidl nfsio 60686 344497 0 0 3 0x14280 nfsidl nfsio 69051 478611 0 0 3 0x14280 nfsidl nfsio 49771 362156 0 0 3 0x14280 nfsidl nfsio 33425 295500 0 0 3 0x14280 nfsidl nfsio 83051 156021 0 0 3 0x14280 nfsidl nfsio 63880 347793 0 0 3 0x14280 nfsidl nfsio 19942 48142 0 0 3 0x14280 nfsidl nfsio 32276 363872 0 0 3 0x14280 nfsidl nfsio 30274 319799 0 0 3 0x14280 nfsidl nfsio 7463 196418 0 0 3 0x14280 nfsidl nfsio 25880 427187 85401 0 3 0x82 nanoslp syz-executor 65144 7034 85401 0 2 0x2 syz-executor 87827 235003 1 0 3 0x100083 ttyopn getty 18077 442392 85401 0 3 0x82 nanoslp syz-executor 87436 48310 85401 0 3 0x82 nanoslp syz-executor 77873 356834 85401 0 3 0x82 nanoslp syz-executor 17398 124940 0 0 3 0x14200 bored sosplice *72131 502534 85401 0 7 0x2 syz-executor 70103 216239 85401 0 2 0x2 syz-executor 43528 328174 85401 0 3 0x82 nanoslp syz-executor 85401 403796 16417 0 2 0x2 syz-executor 16417 459937 31397 0 3 0x10008a sigsusp ksh 31397 508001 89357 0 3 0x98 kqread sshd-session 89357 51142 35285 0 3 0x92 kqread sshd-session 35285 294743 1 0 3 0x88 kqread sshd 92224 326824 40350 73 3 0x1100090 kqread syslogd 40350 516600 1 0 3 0x100082 sbwait syslogd 15877 250864 1 0 3 0x100080 kqread resolvd 6707 248367 47058 77 3 0x100092 kqread dhcpleased 53631 330609 47058 77 3 0x100092 kqread dhcpleased 47058 29444 1 0 3 0x80 kqread dhcpleased 31574 431178 0 0 3 0x14200 bored smr 59469 516877 0 0 2 0x14200 zerothread 34333 457065 0 0 3 0x14200 aiodoned aiodoned 79606 37545 0 0 3 0x14200 syncer update 99150 110865 0 0 3 0x14200 cleaner cleaner 97912 160710 0 0 3 0x14200 reaper reaper 63729 232094 0 0 3 0x14200 pgdaemon pagedaemon 51793 242662 0 0 3 0x14200 bored viomb 43799 32718 0 0 3 0x40014200 acpi0 acpi0 18324 148726 0 0 3 0x14200 bored softnet3 76710 425547 0 0 3 0x14200 bored softnet2 60707 491160 0 0 3 0x14200 bored softnet1 24381 465907 0 0 3 0x14200 bored softnet0 77879 215180 0 0 3 0x14200 bored systqmp 91053 424971 0 0 3 0x14200 bored systq 63402 87671 0 0 3 0x40014200 tmoslp softclock 51666 310822 0 0 3 0x40014200 idle0 1 490794 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 10195 11141K 15228K 166960K 14478 0 pcb 17 20K 23K 166960K 709 0 rtable 229 9K 11K 166960K 811 0 pf 40 14K 268K 166960K 156 0 ifaddr 44 7K 7K 166960K 115 0 ifgroup 61 2K 2K 166960K 169 0 sysctl 4 1K 1K 166960K 9 0 counters 33 17K 18K 166960K 70 0 ioctlops 0 0K 4K 166960K 212 0 iov 0 0K 24K 166960K 255 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1490 94K 94K 166960K 3343 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 54 0 VM map 2 1K 1K 166960K 2 0 sem 27 52K 52K 166960K 62 0 dirhash 12 2K 3K 166960K 48 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 16 57K 97K 166960K 2236 0 sigio 1 0K 0K 166960K 82 0 proc 60 59K 124K 166960K 847 0 subproc 104 6K 6K 166960K 172 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 541 0 in_multi 91 6K 7K 166960K 247 0 ether_multi 1 0K 0K 166960K 15 0 mrt 1 0K 0K 166960K 12 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 675 0 fusefs mount 1 32K 32K 166960K 1 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 206 71K 88K 166960K 23056 0 UVM aobj 59 3K 3K 166960K 62 0 pinsyscall 37 74K 98K 166960K 3393 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 124 0 NDP 14 0K 2K 166960K 86 0 temp 78 6816K 6924K 166960K 84708 0 kqueue 15 24K 32K 166960K 391 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 120 281 0 278 4 3 1 3 0 8 0 rtentry 112 221 0 120 4 0 4 4 0 8 0 unpcb 144 1606 0 1591 8 2 6 6 0 8 5 syncache 336 6 0 6 4 4 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 877 0 872 29 20 9 14 0 8 8 arp 88 37 0 16 1 0 1 1 0 8 0 ipq 40 13 0 13 2 1 1 1 0 8 1 ipqe 40 251 0 251 2 1 1 1 0 8 1 inpcb 336 3015 0 3006 42 33 9 15 0 8 7 nd6 104 59 0 36 1 0 1 1 0 8 0 pkpcb 40 17 0 17 4 3 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 ppxss 1072 24 0 23 5 4 1 1 0 8 0 pfrktable 1344 3 0 3 1 0 1 1 0 8 1 pfanchor 1288 1 0 1 1 0 1 1 0 8 1 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 2 1 0 1 1 0 8 0 pfstate 344 4 0 2 1 0 1 1 0 8 0 pfrule 1344 8 0 8 4 3 1 1 0 8 1 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 833 0 390 36 7 29 29 0 8 1 art_table 32 838 0 390 4 0 4 4 0 8 0 art_node 16 214 0 126 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 55 0 30 1 0 1 1 0 8 0 shmpl 112 59 0 3 2 0 2 2 0 8 0 dirhash 1024 42 0 25 3 0 3 3 0 8 0 dino2pl 256 5580 0 4080 95 0 95 95 0 8 0 ffsino 240 5580 0 4080 89 0 89 89 0 8 0 nchpl 144 8884 0 8368 63 41 22 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 31483 0 31482 8 6 2 3 0 8 1 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 102 0 74 3 0 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 10 0 10 5 4 1 1 0 8 1 scxspl 216 24581 0 24581 14 12 2 8 1 8 2 plimitpl 152 396 0 380 1 0 1 1 0 8 0 sigapl 424 2553 0 2488 11 3 8 8 0 8 0 futexpl 64 32433 0 32429 1 0 1 1 0 8 0 knotepl 120 111492 0 111437 73 63 10 17 0 8 7 kqueuepl 184 678 0 666 5 4 1 3 0 8 0 pipepl 288 300 0 272 6 3 3 5 0 8 0 fdescpl 432 2490 0 2462 5 1 4 5 0 8 0 filepl 120 17940 0 17697 30 16 14 16 0 8 3 lockfpl 104 765 0 763 1 0 1 1 0 8 0 lockfspl 48 248 0 246 1 0 1 1 0 8 0 sessionpl 144 29 0 21 1 0 1 1 0 8 0 pgrppl 48 63 0 47 1 0 1 1 0 8 0 ucredpl 104 4251 0 4239 1 0 1 1 0 8 0 zombiepl 144 3380 0 3380 4 3 1 1 0 8 1 processpl 1096 2553 0 2488 6 1 5 5 0 8 0 procpl 648 6125 0 6049 9 1 8 8 0 8 0 sosppl 168 13 0 13 5 4 1 1 0 8 1 sockpl 504 4951 0 4924 99 87 12 29 0 8 8 mcl64k 65536 31 0 31 7 6 1 1 0 8 1 mcl16k 16384 2 0 2 2 1 1 1 0 8 1 mcl9k 9216 3 0 3 2 2 0 1 0 8 0 mcl8k 8192 36 0 36 7 6 1 1 0 8 1 mcl4k 4096 5700 0 5650 21 13 8 15 0 8 1 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 2307 0 2303 7 5 2 5 0 8 0 mtagpl 96 145 0 109 3 1 2 3 0 8 0 mbufpl 256 31888 0 31704 115 89 26 81 0 8 8 bufpl 280 8187 0 1940 447 0 447 447 0 8 0 anonpl 24 389636 0 386511 138 92 46 57 0 187 14 amapchunkpl 152 76702 0 76277 67 32 35 35 0 158 14 amappl16 200 9173 0 9139 68 55 13 15 0 8 8 amappl15 192 12 0 12 1 1 0 1 0 8 0 amappl14 184 117 0 107 1 0 1 1 0 8 0 amappl13 176 10 0 9 1 0 1 1 0 8 0 amappl12 168 3183 0 3156 3 1 2 3 0 8 0 amappl11 160 72 0 62 1 0 1 1 0 8 0 amappl10 152 16 0 15 4 3 1 1 0 8 0 amappl9 144 125 0 124 1 0 1 1 0 8 0 amappl8 136 21 0 20 1 0 1 1 0 8 0 amappl7 128 131 0 120 1 0 1 1 0 8 0 amappl6 120 220 0 218 1 0 1 1 0 8 0 amappl5 112 151 0 142 1 0 1 1 0 8 0 amappl4 104 312 0 296 1 0 1 1 0 8 0 amappl3 96 14009 0 13928 3 0 3 3 0 8 0 amappl2 88 2804 0 2728 2 0 2 2 0 8 0 amappl1 80 14419 0 13909 15 3 12 13 0 8 0 amappl 88 22401 0 22249 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 0 1 1 0 8 1 dma16384 16384 1 0 1 1 1 0 1 0 8 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 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 61 0 3 2 0 2 2 0 8 0 uaddrrnd 24 2490 0 2462 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2490 0 2462 1 0 1 1 0 8 0 vmmpekpl 168 19518 0 19469 4 1 3 3 0 8 0 vmmpepl 168 158326 0 156655 136 46 90 90 0 357 10 vmsppl 352 2489 0 2462 4 1 3 4 0 8 0 rwobjpl 24 48832 0 42008 43 0 43 43 0 8 0 pdppl 4096 4987 0 4924 150 83 67 83 0 8 4 pvpl 32 1041651 0 1033709 238 128 110 123 0 265 20 pmappl 216 2489 0 2462 3 1 2 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 731 0 367 15 3 12 12 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(ffffffff82fb898a) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8060160d00,ffff80002a4b07a8) at vgonel+0x681 sys/kern/vfs_subr.c:1202 vrecycle(fffffd8060160d00,ffff80002a4b07a8) at vrecycle+0x7c sys/kern/vfs_subr.c:1128 ufs_inactive(ffff80002a57b128) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8060160d00,ffff80002a4b07a8) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd8060160d00) at vput+0xdc sys/kern/vfs_subr.c:781 VOP_REMOVE(fffffd806bdfcb30,fffffd8060160d00,ffff80002a57b2a8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a4b07a8,ffffff9c,749f16120930,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff80002a57b420) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x749f16120de0, 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(ffffffff82fb898a) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8060160d00,ffff80002a4b07a8) at vgonel+0x681 sys/kern/vfs_subr.c:1202 vrecycle(fffffd8060160d00,ffff80002a4b07a8) at vrecycle+0x7c sys/kern/vfs_subr.c:1128 ufs_inactive(ffff80002a57b128) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8060160d00,ffff80002a4b07a8) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd8060160d00) at vput+0xdc sys/kern/vfs_subr.c:781 VOP_REMOVE(fffffd806bdfcb30,fffffd8060160d00,ffff80002a57b2a8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a4b07a8,ffffff9c,749f16120930,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff80002a57b420) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x749f16120de0, count: -11