panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *501314 28203 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832e8dad) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a0eb6c8,ffff80002a787718) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806a0eb6c8,ffff80002a787718) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff80002a833598) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a0eb6c8,ffff80002a787718) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd806a0eb6c8) at vput+0xdc sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd80666b3010,fffffd806a0eb6c8,ffff80002a833718) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a787718,ffffff9c,7f5bd0db2680,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1896 syscall(ffff80002a833890) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f5bd0db2b30, 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(ffffffff832e8dad) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a0eb6c8,ffff80002a787718) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806a0eb6c8,ffff80002a787718) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff80002a833598) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a0eb6c8,ffff80002a787718) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd806a0eb6c8) at vput+0xdc sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd80666b3010,fffffd806a0eb6c8,ffff80002a833718) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a787718,ffffff9c,7f5bd0db2680,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1896 syscall(ffff80002a833890) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f5bd0db2b30, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a8333e0 rbx 0 rdx 0 rcx 0 rax 0xffff80002a787718 r8 0x101010101010101 r9 0x8080808080808080 r10 0x22f5633de2a59d83 r11 0x95158984036e2e5f r12 0 r13 0x800 r14 0 r15 0x1 rip 0xffffffff8161b425 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a8333d0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=501314 pid=28203 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=0xffff80002a7871f8,0xffff80002a7e0cf0 process=0xffff8000ffff8d00 user=0xffff80002a82e000, vmspace=0xfffffd800844e708 estcpu=36, cpticks=0, pctcpu=0.44, user=44, sys=134, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 42803 266207 46900 0 3 0 futex syz-executor 42803 5292 46900 0 3 0x4000000 futex syz-executor 53387 293975 16313 0 2 0x1044 syz-executor 30759 13584 15608 0 2 0 syz-executor 30759 191835 15608 0 2 0x4000000 syz-executor 30759 414796 15608 0 3 0x4000080 fsleep syz-executor 77953 511549 2902 0 2 0 syz-executor 77953 251159 2902 0 2 0x4000000 syz-executor 40139 131848 24 0 2 0 syz-executor 35563 158508 86815 0 2 0 syz-executor 35563 340213 86815 0 2 0x4000000 syz-executor 42215 32768 0 0 3 0x14280 nfsidl nfsio 73903 115495 0 0 3 0x14280 nfsidl nfsio 92644 400873 0 0 3 0x14280 nfsidl nfsio 20809 168819 0 0 3 0x14280 nfsidl nfsio 16319 443296 0 0 3 0x14280 nfsidl nfsio 30478 37255 0 0 3 0x14280 nfsidl nfsio 44775 480518 0 0 3 0x14280 nfsidl nfsio 83429 44101 0 0 3 0x14280 nfsidl nfsio 71604 432551 0 0 3 0x14280 nfsidl nfsio 20924 152426 0 0 3 0x14280 nfsidl nfsio 26416 215862 0 0 3 0x14280 nfsidl nfsio 21906 227029 0 0 3 0x14280 nfsidl nfsio 56529 103 0 0 3 0x14280 nfsidl nfsio 64299 53623 0 0 3 0x14280 nfsidl nfsio 16313 109604 60589 0 3 0x82 ppwait syz-executor 3369 236297 0 0 3 0x14280 nfsidl nfsio 69105 418838 0 0 3 0x14280 nfsidl nfsio 17302 50659 0 0 3 0x14280 nfsidl nfsio 27154 488556 0 0 3 0x14280 nfsidl nfsio 4924 501581 0 0 3 0x14280 nfsidl nfsio 21149 16239 0 0 3 0x14280 nfsidl nfsio 36699 465399 60589 0 2 0x2 syz-executor 24 463386 60589 0 3 0x82 nanoslp syz-executor 86815 414980 60589 0 3 0x82 nanoslp syz-executor 46900 194098 60589 0 3 0x82 nanoslp syz-executor 70327 474918 0 0 3 0x14200 bored sosplice 15608 100557 60589 0 3 0x82 nanoslp syz-executor 2902 381739 60589 0 3 0x82 nanoslp syz-executor *28203 501314 60589 0 7 0x2 syz-executor 60589 502353 65692 0 3 0x82 kqread syz-executor 65692 333915 24290 0 3 0x10008a sigsusp ksh 24290 448164 74105 0 3 0x98 kqread sshd-session 74105 364029 69709 0 3 0x92 kqread sshd-session 66670 61912 1 0 3 0x100083 ttyin getty 69709 120929 1 0 3 0x88 kqread sshd 4594 480241 22629 73 3 0x1100090 kqread syslogd 22629 359965 1 0 3 0x100082 sbwait syslogd 1124 185101 1 0 3 0x100080 kqread resolvd 36514 279122 14257 77 3 0x100092 kqread dhcpleased 57756 117007 14257 77 3 0x100092 kqread dhcpleased 14257 1758 1 0 3 0x80 kqread dhcpleased 49817 358721 0 0 3 0x14200 bored smr 67457 172621 0 0 2 0x14200 zerothread 5595 61608 0 0 3 0x14200 aiodoned aiodoned 42069 270981 0 0 3 0x14200 syncer update 2261 30024 0 0 3 0x14200 cleaner cleaner 8872 211684 0 0 3 0x14200 reaper reaper 77660 375309 0 0 3 0x14200 pgdaemon pagedaemon 87966 382437 0 0 3 0x14200 bored viomb 60158 399371 0 0 3 0x40014200 acpi0 acpi0 77505 393938 0 0 3 0x14200 bored softnet3 69344 444100 0 0 3 0x14200 bored softnet2 16941 214269 0 0 3 0x14200 bored softnet1 54986 363360 0 0 3 0x14200 bored softnet0 69492 108000 0 0 3 0x14200 bored systqmp 72772 108241 0 0 3 0x14200 bored systq 31293 336383 0 0 3 0x40014200 tmoslp softclock 56279 443586 0 0 3 0x40014200 idle0 1 9795 0 0 3 0x80082 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 10217 11068K 11373K 166960K 12272 0 pcb 17 19K 20K 166960K 445 0 rtable 177 8K 10K 166960K 1264 0 pf 35 14K 270K 166960K 278 0 ifaddr 32 5K 8K 166960K 190 0 ifgroup 54 2K 2K 166960K 358 0 sysctl 4 1K 3K 166960K 11 0 counters 31 17K 18K 166960K 142 0 ioctlops 0 0K 4K 166960K 393 0 iov 0 0K 32K 166960K 357 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1383 87K 87K 166960K 2912 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 9K 166960K 37 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 241 0 dirhash 15 2K 2K 166960K 63 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 3032 0 sigio 0 0K 0K 166960K 111 0 proc 61 59K 124K 166960K 1090 0 subproc 72 4K 4K 166960K 182 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 370 0 in_multi 62 4K 7K 166960K 301 0 ether_multi 1 0K 0K 166960K 26 0 mrt 1 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 1 0K 2K 166960K 1288 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 6 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 200 72K 89K 166960K 29548 0 UVM aobj 114 7K 7K 166960K 118 0 pinsyscall 38 76K 98K 166960K 4369 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 123 0 NDP 12 0K 2K 166960K 139 0 temp 76 8636K 8764K 166960K 144101 0 kqueue 13 20K 32K 166960K 513 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 120 262 0 259 1 0 1 1 0 8 0 rtentry 112 432 0 359 4 0 4 4 0 8 0 unpcb 144 2103 0 2088 13 11 2 6 0 8 1 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 693 0 689 15 10 5 8 0 8 4 arp 88 96 0 81 1 0 1 1 0 8 0 ipq 40 13 0 13 1 0 1 1 0 8 1 ipqe 40 134 0 134 1 0 1 1 0 8 1 inpcb 344 3250 0 3243 31 23 8 11 0 8 7 nd6 104 75 0 54 1 0 1 1 0 8 0 pkpcb 40 17 0 17 4 3 1 1 0 8 1 kcovpl 48 20 0 12 1 0 1 1 0 8 0 ppxss 1072 65 0 65 6 5 1 1 0 8 1 pppxif 1376 16 0 16 4 3 1 1 0 8 1 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 4 1 1 0 1 0 8 0 pfstate 344 2 0 2 1 1 0 1 0 8 0 pfrule 1344 9 0 7 2 1 1 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1345 0 1026 34 7 27 29 0 8 1 art_table 32 1348 0 1026 4 0 4 4 0 8 0 art_node 16 416 0 357 1 0 1 1 0 8 0 sysvmsgpl 40 80 0 76 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 236 0 226 1 0 1 1 0 8 0 shmpl 112 115 0 4 4 0 4 4 0 8 0 dirhash 1024 52 0 33 3 0 3 3 0 8 0 dino2pl 256 6789 0 5277 95 0 95 95 0 8 0 ffsino 248 6789 0 5277 96 1 95 95 0 8 0 nchpl 144 11013 0 9318 65 1 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 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 41779 0 41776 8 4 4 4 0 8 3 kstatmem 264 200 0 176 3 1 2 3 0 8 0 scsiplug 72 16 0 16 4 3 1 1 0 8 1 scxspl 216 32669 0 32669 14 12 2 8 1 8 2 plimitpl 152 875 0 858 1 0 1 1 0 8 0 sigapl 424 3338 0 3273 9 1 8 8 0 8 0 futexpl 64 41964 0 41962 1 0 1 1 0 8 0 knotepl 120 801841 0 801794 42 32 10 11 0 8 7 kqueuepl 184 1001 0 992 8 7 1 4 0 8 0 pipepl 296 559 0 532 8 0 8 8 0 8 5 fdescpl 440 3272 0 3244 5 1 4 5 0 8 0 filepl 120 23193 0 22981 25 11 14 14 0 8 5 lockfpl 104 1183 0 1181 3 1 2 2 0 8 1 lockfspl 48 303 0 301 1 0 1 1 0 8 0 sessionpl 144 33 0 25 1 0 1 1 0 8 0 pgrppl 48 136 0 120 1 0 1 1 0 8 0 ucredpl 104 4534 0 4522 1 0 1 1 0 8 0 zombiepl 144 4157 0 4157 4 3 1 1 0 8 1 processpl 1104 3338 0 3273 6 1 5 5 0 8 0 procpl 656 7987 0 7917 8 1 7 7 0 8 0 sosppl 168 10 0 10 4 3 1 1 0 8 1 sockpl 528 5746 0 5721 28 21 7 11 0 8 5 mcl64k 65536 98 0 98 5 4 1 1 0 8 1 mcl16k 16384 6 0 6 2 1 1 1 0 8 1 mcl12k 12288 6 0 6 4 3 1 1 0 8 1 mcl9k 9216 3 0 3 2 1 1 1 0 8 1 mcl8k 8192 72 0 72 5 4 1 1 0 8 1 mcl4k 4096 6501 0 6451 21 12 9 15 0 8 1 mcl2k2 2112 6 0 6 3 3 0 1 0 8 0 mcl2k 2048 3434 0 3428 10 5 5 6 0 8 4 mtagpl 96 19 0 18 1 0 1 1 0 8 0 mbufpl 256 34099 0 33976 24 4 20 20 0 8 6 bufpl 280 9270 0 3042 446 0 446 446 0 8 0 anonpl 24 395614 0 381182 118 4 114 114 0 187 1 amapchunkpl 152 99933 0 99390 66 29 37 40 0 158 11 amappl16 200 7482 0 6880 54 9 45 45 0 8 1 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 124 0 114 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 4104 0 4076 3 1 2 3 0 8 0 amappl11 160 69 0 58 1 0 1 1 0 8 0 amappl10 152 6 0 6 2 2 0 1 0 8 0 amappl9 144 322 0 321 1 0 1 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 118 0 107 1 0 1 1 0 8 0 amappl6 120 286 0 282 1 0 1 1 0 8 0 amappl5 112 158 0 151 1 0 1 1 0 8 0 amappl4 104 340 0 324 1 0 1 1 0 8 0 amappl3 96 20296 0 20201 4 0 4 4 0 8 0 amappl2 88 801 0 743 2 0 2 2 0 8 0 amappl1 80 16866 0 16350 13 1 12 13 0 8 0 amappl 88 28914 0 28763 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 262 0 262 5 4 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 117 0 4 3 0 3 3 0 8 0 uaddrrnd 24 3272 0 3244 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3272 0 3244 1 0 1 1 0 8 0 vmmpekpl 168 24472 0 24407 4 0 4 4 0 8 1 vmmpepl 168 203230 0 201008 147 16 131 131 0 357 16 vmsppl 360 3271 0 3244 4 1 3 4 0 8 0 rwobjpl 32 54510 0 47060 63 0 63 63 0 8 1 pdppl 4096 6550 0 6488 166 98 68 82 0 8 6 pvpl 32 1290516 0 1270950 238 44 194 194 0 265 11 pmappl 216 3271 0 3244 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 401 0 157 7 0 7 7 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(ffffffff832e8dad) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a0eb6c8,ffff80002a787718) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806a0eb6c8,ffff80002a787718) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff80002a833598) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a0eb6c8,ffff80002a787718) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd806a0eb6c8) at vput+0xdc sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd80666b3010,fffffd806a0eb6c8,ffff80002a833718) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a787718,ffffff9c,7f5bd0db2680,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1896 syscall(ffff80002a833890) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f5bd0db2b30, 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(ffffffff832e8dad) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a0eb6c8,ffff80002a787718) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806a0eb6c8,ffff80002a787718) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff80002a833598) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a0eb6c8,ffff80002a787718) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd806a0eb6c8) at vput+0xdc sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd80666b3010,fffffd806a0eb6c8,ffff80002a833718) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a787718,ffffff9c,7f5bd0db2680,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1896 syscall(ffff80002a833890) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f5bd0db2b30, count: -11