panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 23753 44192 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832ff106) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c4afcc8,ffff80002a7e8a58) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806c4afcc8,ffff80002a7e8a58) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff8000335d9078) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c4afcc8,ffff80002a7e8a58) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd806c4afcc8) at vput+0xdc sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd806574e110,fffffd806c4afcc8,ffff8000335d91f8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7e8a58,ffffff9c,76dfaf102860,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff8000335d9370) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000335d9370) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76dfaf102d10, 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(ffffffff832ff106) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c4afcc8,ffff80002a7e8a58) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806c4afcc8,ffff80002a7e8a58) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff8000335d9078) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c4afcc8,ffff80002a7e8a58) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd806c4afcc8) at vput+0xdc sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd806574e110,fffffd806c4afcc8,ffff8000335d91f8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7e8a58,ffffff9c,76dfaf102860,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff8000335d9370) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000335d9370) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76dfaf102d10, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff8000335d8ec0 rbx 0 rdx 0 rcx 0 rax 0xffff80002a7e8a58 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc13e976247b5085 r11 0xc457e758f4d82fa4 r12 0 r13 0x800 r14 0 r15 0x1 rip 0xffffffff824bdd35 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000335d8eb0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=23753 pid=44192 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=0xffff80002a7e8ce8,0xffff80002a824568 process=0xffff80002a7f6fd8 user=0xffff8000335d4000, vmspace=0xfffffd806e9db710 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 40735 455034 82695 0 2 0 syz-executor 40735 168084 82695 0 2 0x4000000 syz-executor 32691 368622 50075 0 2 0x10 syz-executor 32691 39617 50075 0 2 0x4000010 syz-executor 3301 302920 85299 0 2 0 syz-executor 3301 179363 85299 0 3 0x4000000 vmmaplk syz-executor 3301 14245 85299 0 2 0x4000000 syz-executor 62557 220648 50822 0 3 0 vmmaplk syz-executor 62557 497065 50822 0 3 0x4000080 fsleep syz-executor 62557 95907 50822 0 2 0x4000000 syz-executor 14727 509560 15548 0 2 0 syz-executor 14727 214568 15548 0 3 0x4000080 sbwait syz-executor 14727 35856 15548 0 2 0x4000000 syz-executor 14727 381133 15548 0 3 0x4000080 fsleep syz-executor 40219 291811 39378 0 2 0 syz-executor 40219 482050 39378 0 2 0x4000000 syz-executor *44192 23753 90745 0 7 0x2 syz-executor 50822 12191 90745 0 3 0x82 nanoslp syz-executor 50075 431932 90745 0 3 0x82 nanoslp syz-executor 94869 25210 0 0 3 0x14200 acct acct 82695 216823 90745 0 3 0x82 nanoslp syz-executor 71614 488242 0 0 3 0x14280 nfsidl nfsio 86798 389883 0 0 3 0x14280 nfsidl nfsio 16332 176072 0 0 3 0x14280 nfsidl nfsio 89207 189541 0 0 3 0x14280 nfsidl nfsio 95454 270405 0 0 3 0x14280 nfsidl nfsio 39413 81530 0 0 3 0x14280 nfsidl nfsio 62005 88796 0 0 3 0x14280 nfsidl nfsio 61418 300585 0 0 3 0x14280 nfsidl nfsio 83499 490889 0 0 3 0x14280 nfsidl nfsio 26467 65297 0 0 3 0x14280 nfsidl nfsio 62955 17524 0 0 3 0x14280 nfsidl nfsio 29830 9723 0 0 3 0x14280 nfsidl nfsio 37820 515891 0 0 3 0x14280 nfsidl nfsio 4332 284093 0 0 3 0x14280 nfsidl nfsio 59936 407149 0 0 3 0x14280 nfsidl nfsio 11655 247539 0 0 3 0x14280 nfsidl nfsio 58261 495888 0 0 3 0x14280 nfsidl nfsio 10113 290917 0 0 3 0x14280 nfsidl nfsio 69389 96530 0 0 3 0x14280 nfsidl nfsio 4194 124361 0 0 3 0x14280 nfsidl nfsio 12553 343865 1 0 3 0x100083 ttyin getty 15548 223440 90745 0 3 0x82 nanoslp syz-executor 85299 136629 90745 0 3 0x82 nanoslp syz-executor 60413 160676 0 0 3 0x14200 bored sosplice 39378 480282 90745 0 3 0x82 nanoslp syz-executor 47420 280362 90745 0 2 0x2 syz-executor 90745 217105 89585 0 3 0x82 kqread syz-executor 89585 383154 12743 0 3 0x10008a sigsusp ksh 12743 90994 89079 0 3 0x98 kqread sshd-session 89079 296756 53550 0 3 0x92 kqread sshd-session 53550 251004 1 0 3 0x88 kqread sshd 50870 118373 33749 73 3 0x1100090 kqread syslogd 33749 291581 1 0 3 0x100082 sbwait syslogd 10608 339602 1 0 3 0x100080 kqread resolvd 64229 473429 2726 77 3 0x100092 kqread dhcpleased 91102 281516 2726 77 3 0x100092 kqread dhcpleased 2726 230479 1 0 3 0x80 kqread dhcpleased 38042 48151 0 0 3 0x14200 bored smr 83944 99673 0 0 2 0x14200 zerothread 87215 411860 0 0 3 0x14200 aiodoned aiodoned 60872 413253 0 0 3 0x14200 syncer update 83612 172600 0 0 3 0x14200 cleaner cleaner 58115 469214 0 0 3 0x14200 reaper reaper 36919 207706 0 0 3 0x14200 pgdaemon pagedaemon 14666 521909 0 0 3 0x14200 bored viomb 94818 102108 0 0 3 0x40014200 acpi0 acpi0 89683 424066 0 0 3 0x14200 bored softnet3 90501 3408 0 0 3 0x14200 bored softnet2 58809 168459 0 0 3 0x14200 bored softnet1 6387 192334 0 0 3 0x14200 bored softnet0 33973 5207 0 0 3 0x14200 bored systqmp 20119 454733 0 0 3 0x14200 bored systq 10773 217350 0 0 3 0x40014200 tmoslp softclock 47527 112259 0 0 3 0x40014200 idle0 1 426005 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 10210 11073K 13218K 166960K 12873 0 pcb 18 17K 20K 166960K 452 0 rtable 231 7K 8K 166960K 853 0 pf 32 13K 20K 166960K 143 0 ifaddr 44 8K 8K 166960K 129 0 ifgroup 52 2K 2K 166960K 200 0 sysctl 4 1K 2K 166960K 7 0 counters 31 17K 17K 166960K 88 0 ioctlops 0 0K 4K 166960K 281 0 iov 0 0K 16K 166960K 158 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1619 102K 102K 166960K 3073 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 40 0 VM map 2 1K 1K 166960K 2 0 sem 20 41K 41K 166960K 133 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 85K 166960K 2137 0 sigio 0 0K 0K 166960K 21 0 proc 61 59K 91K 166960K 907 0 subproc 72 4K 4K 166960K 144 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 340 0 in_multi 98 7K 7K 166960K 253 0 ether_multi 1 0K 0K 166960K 20 0 mrt 2 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 0 0K 1K 166960K 788 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 201 143K 159K 166960K 20912 0 UVM aobj 53 7K 7K 166960K 60 0 pinsyscall 38 76K 90K 166960K 3398 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 103 0 NDP 12 0K 2K 166960K 87 0 temp 76 8686K 8756K 166960K 71694 0 kqueue 14 22K 34K 166960K 321 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 120 216 0 212 2 1 1 2 0 8 0 rtentry 136 267 0 162 4 0 4 4 0 8 0 unpcb 144 1217 0 1200 10 6 4 6 0 8 3 syncache 336 9 0 9 3 3 0 1 0 8 0 tcpqe 32 12 0 12 3 3 0 1 0 8 0 tcpcb 808 611 0 607 13 11 2 7 0 8 1 arp 88 46 0 25 1 0 1 1 0 8 0 ipq 40 9 0 7 2 1 1 1 0 8 0 ipqe 40 12 0 10 2 1 1 1 0 8 0 inpcb 344 2303 0 2293 38 33 5 19 0 8 3 nd6 104 67 0 39 1 0 1 1 0 8 0 pkpcb 40 11 0 11 6 5 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1072 34 0 33 3 2 1 1 0 8 0 pppxif 1384 10 0 10 4 3 1 1 0 8 1 pfrktable 1344 33 0 33 1 1 0 1 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1059 0 598 36 7 29 30 0 8 0 art_table 32 1061 0 598 4 0 4 4 0 8 0 art_node 16 259 0 167 1 0 1 1 0 8 0 sysvmsgpl 40 45 0 40 2 1 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 56 0 38 1 0 1 1 0 8 0 shmpl 112 57 0 7 2 0 2 2 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 5359 0 3851 95 0 95 95 0 8 0 ffsino 248 5359 0 3851 95 0 95 95 0 8 0 nchpl 144 8297 0 6595 64 0 64 64 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 29926 0 29926 7 5 2 2 0 8 2 kstatmem 264 108 0 84 2 0 2 2 0 8 0 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 24382 0 24382 11 10 1 8 1 8 1 plimitpl 152 376 0 360 1 0 1 1 0 8 0 sigapl 424 2430 0 2363 8 0 8 8 0 8 0 futexpl 64 26889 0 26887 1 0 1 1 0 8 0 knotepl 120 74582 0 74362 51 41 10 17 0 8 3 kqueuepl 184 634 0 624 5 2 3 3 0 8 2 pipepl 296 407 0 380 9 4 5 5 0 8 2 fdescpl 440 2389 0 2360 4 0 4 4 0 8 0 filepl 120 16766 0 16552 30 18 12 16 0 8 2 lockfpl 104 694 0 691 2 1 1 2 0 8 0 lockfspl 48 224 0 221 1 0 1 1 0 8 0 sessionpl 144 35 0 27 1 0 1 1 0 8 0 pgrppl 48 79 0 63 1 0 1 1 0 8 0 ucredpl 104 3452 0 3439 1 0 1 1 0 8 0 zombiepl 144 3361 0 3361 4 3 1 1 0 8 1 processpl 1112 2430 0 2363 5 0 5 5 0 8 0 procpl 656 5803 0 5725 9 1 8 8 0 8 0 sosppl 168 9 0 9 3 3 0 1 0 8 0 sockpl 528 3780 0 3749 36 29 7 16 0 8 4 mcl64k 65536 76 0 75 4 3 1 1 0 8 0 mcl16k 16384 25 0 25 4 3 1 1 0 8 1 mcl12k 12288 9 0 9 3 2 1 1 0 8 1 mcl9k 9216 7 0 7 4 3 1 1 0 8 1 mcl8k 8192 37 0 37 6 5 1 1 0 8 1 mcl4k 4096 5481 0 5428 21 13 8 16 0 8 1 mcl2k 2048 2238 0 2233 9 7 2 7 0 8 1 mtagpl 96 43 0 42 1 0 1 1 0 8 0 mbufpl 256 24641 0 24463 23 10 13 18 0 8 0 bufpl 280 7483 0 1256 446 0 446 446 0 8 0 anonpl 24 308022 0 304949 108 63 45 50 0 187 14 amapchunkpl 152 72901 0 72511 65 35 30 35 0 158 10 amappl16 200 5107 0 5072 54 41 13 15 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 129 0 119 1 0 1 1 0 8 0 amappl13 176 7 0 6 1 0 1 1 0 8 0 amappl12 168 3133 0 3105 2 0 2 2 0 8 0 amappl11 160 47 0 36 1 0 1 1 0 8 0 amappl10 152 7 0 6 1 0 1 1 0 8 0 amappl9 144 242 0 242 1 1 0 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 121 0 111 1 0 1 1 0 8 0 amappl6 120 253 0 249 1 0 1 1 0 8 0 amappl5 112 149 0 142 1 0 1 1 0 8 0 amappl4 104 337 0 320 1 0 1 1 0 8 0 amappl3 96 14665 0 14574 5 1 4 4 0 8 0 amappl2 88 749 0 693 2 0 2 2 0 8 0 amappl1 80 17125 0 16589 13 0 13 13 0 8 0 amappl 88 19671 0 19534 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 2 1 1 0 8 1 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 9 0 9 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 59 0 7 1 0 1 1 0 8 0 uaddrrnd 24 2388 0 2360 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2388 0 2360 1 0 1 1 0 8 0 vmmpekpl 168 18891 0 18830 4 0 4 4 0 8 0 vmmpepl 168 151999 0 150200 128 32 96 96 0 357 10 vmsppl 360 2388 0 2360 4 1 3 4 0 8 0 rwobjpl 32 43907 0 37109 57 0 57 57 0 8 0 pdppl 4096 4785 0 4720 152 85 67 77 0 8 2 pvpl 32 968684 0 960046 198 89 109 117 0 265 13 pmappl 216 2388 0 2360 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 382 0 155 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(ffffffff832ff106) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c4afcc8,ffff80002a7e8a58) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806c4afcc8,ffff80002a7e8a58) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff8000335d9078) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c4afcc8,ffff80002a7e8a58) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd806c4afcc8) at vput+0xdc sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd806574e110,fffffd806c4afcc8,ffff8000335d91f8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7e8a58,ffffff9c,76dfaf102860,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff8000335d9370) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000335d9370) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76dfaf102d10, 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(ffffffff832ff106) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c4afcc8,ffff80002a7e8a58) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806c4afcc8,ffff80002a7e8a58) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff8000335d9078) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c4afcc8,ffff80002a7e8a58) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd806c4afcc8) at vput+0xdc sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd806574e110,fffffd806c4afcc8,ffff8000335d91f8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7e8a58,ffffff9c,76dfaf102860,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff8000335d9370) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000335d9370) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76dfaf102d10, count: -11