panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 95659 36340 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83413c90) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a6d02c8,ffff80002a7667d8) at vgonel+0x663 vrecycle(fffffd806a6d02c8,ffff80002a7667d8) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a7ef1f0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a6d02c8,ffff80002a7667d8) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806a6d02c8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c996a58,fffffd806a6d02c8,ffff80002a7ef358) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7667d8,ffffff9c,79bcb4bc8b10,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929 syscall(ffff80002a7ef4c0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7ef4c0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79bcb4bc8fc0, 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(ffffffff83413c90) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a6d02c8,ffff80002a7667d8) at vgonel+0x663 vrecycle(fffffd806a6d02c8,ffff80002a7667d8) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a7ef1f0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a6d02c8,ffff80002a7667d8) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806a6d02c8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c996a58,fffffd806a6d02c8,ffff80002a7ef358) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7667d8,ffffff9c,79bcb4bc8b10,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929 syscall(ffff80002a7ef4c0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7ef4c0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79bcb4bc8fc0, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a7ef030 rbx 0xfffffd806a6d02c8 rdx 0 rcx 0 rax 0xffff80002a7667d8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x45eb0afd437ea81d r11 0x941b3586b93e4f73 r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff8131b055 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a7ef020 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=95659 pid=36340 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a766540,0xffff80002a767a10 process=0xffff80002a79c910 user=0xffff80002a7ea000, vmspace=0xfffffd807ec66cf0 estcpu=36, cpticks=3, pctcpu=0.2, user=0, sys=3, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 25842 120616 3264 0 2 0 syz-executor 25842 275891 3264 0 2 0x4000000 syz-executor 81478 25644 98776 0 2 0 syz-executor 81478 95857 98776 0 3 0x4000000 biowait syz-executor 916 162891 62123 0 3 0x80 nanoslp syz-executor 916 240483 62123 0 3 0x4000080 fsleep syz-executor 12706 185747 46533 0 2 0 syz-executor 12706 209938 46533 0 2 0x4000000 syz-executor 12706 429231 46533 0 3 0x4000000 inode syz-executor 12706 150646 46533 0 2 0x4000000 syz-executor 12706 257769 46533 0 3 0x4000080 fsleep syz-executor 9092 217168 87596 0 2 0x2 syz-executor 62123 28326 87596 0 3 0x82 nanoslp syz-executor 6093 192395 87596 0 2 0x2 syz-executor 3264 69024 87596 0 3 0x82 nanoslp syz-executor 46533 10211 87596 0 3 0x82 nanoslp syz-executor 26933 413273 87596 0 2 0x2 syz-executor *36340 95659 87596 0 7 0x2 syz-executor 98776 15332 87596 0 3 0x82 nanoslp syz-executor 87596 351332 4125 0 2 0x2 syz-executor 4125 68859 38521 0 3 0x10008a sigsusp ksh 38521 230001 36583 0 3 0x98 kqread sshd-session 36583 147632 86790 0 3 0x92 kqread sshd-session 63838 80570 1 0 3 0x100083 ttyin getty 86790 433477 1 0 3 0x88 kqread sshd 15181 172343 44045 73 3 0x1100090 kqread syslogd 44045 288649 1 0 3 0x100082 sbwait syslogd 76476 229377 1 0 3 0x100080 kqread resolvd 94851 45893 52248 77 3 0x100092 kqread dhcpleased 46425 101237 52248 77 3 0x100092 kqread dhcpleased 52248 342486 1 0 3 0x80 kqread dhcpleased 49062 408624 0 0 3 0x14200 bored smr 39966 7606 0 0 2 0x14200 zerothread 36728 47562 0 0 3 0x14200 aiodoned aiodoned 36917 467087 0 0 3 0x14200 syncer update 7202 184813 0 0 3 0x14200 cleaner cleaner 73546 173574 0 0 3 0x14200 reaper reaper 44201 275399 0 0 3 0x14200 pgdaemon pagedaemon 19885 321039 0 0 3 0x14200 bored viomb 10840 153480 0 0 3 0x40014200 acpi0 acpi0 85221 87303 0 0 3 0x14200 bored softnet0 77695 439588 0 0 3 0x14200 smrbar systqmp 91683 487883 0 0 3 0x14200 bored systq 55268 227706 0 0 3 0x40014200 tmoslp softclock 56364 468725 0 0 3 0x40014200 idle0 1 521867 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 11032 12171K 12319K 166960K 12228 0 pcb 17 12K 12K 166960K 19 0 rtable 238 7K 7K 166960K 368 0 pf 31 13K 16K 166960K 44 0 ifaddr 42 7K 8K 166960K 51 0 ifgroup 50 2K 2K 166960K 63 0 sysctl 1 1K 9K 166960K 5 0 counters 33 17K 18K 166960K 42 0 ioctlops 0 0K 4K 166960K 44 0 iov 0 0K 2K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1298 82K 82K 166960K 1420 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 97K 166960K 200 0 sigio 0 0K 0K 166960K 4 0 proc 59 59K 124K 166960K 497 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 1 0 in_multi 99 7K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 368 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 198 158K 168K 166960K 3440 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 36 72K 96K 166960K 1310 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 13 0K 2K 166960K 31 0 temp 35 9098K 9170K 166960K 6139 0 kqueue 14 22K 24K 166960K 37 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 38 0 35 1 0 1 1 0 8 0 rtentry 136 116 0 7 4 0 4 4 0 8 0 unpcb 144 66 0 50 1 0 1 1 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 16 0 12 1 0 1 1 0 8 0 arp 96 19 0 2 1 0 1 1 0 8 0 inpcb 328 79 0 72 2 1 1 2 0 8 0 nd6 112 24 0 0 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 7 0 7 1 0 1 1 0 8 1 pppxif 1416 2 0 2 1 0 1 1 0 8 1 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1360 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 463 0 4 29 0 29 29 0 8 0 art_table 40 464 0 4 5 0 5 5 0 8 0 art_node 32 116 0 16 1 0 1 1 0 8 0 semapl 64 6 0 2 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1682 0 220 92 0 92 92 0 8 0 ffsino 256 1682 0 220 92 0 92 92 0 8 0 nchpl 144 1949 0 258 64 0 64 64 0 8 0 vnodes 216 1798 0 0 100 0 100 100 0 8 0 namei 1024 5705 0 5702 3 2 1 2 0 8 0 kstatmem 264 31 0 8 2 0 2 2 0 8 0 scxspl 216 6801 0 6800 5 4 1 5 1 8 0 plimitpl 152 40 0 23 1 0 1 1 0 8 0 sigapl 424 498 0 458 6 1 5 6 0 8 0 knotepl 120 4431 0 4383 2 0 2 2 0 8 0 kqueuepl 184 36 0 26 1 0 1 1 0 8 0 pipepl 304 125 0 98 3 0 3 3 0 8 0 fdescpl 448 485 0 458 5 1 4 5 0 8 0 filepl 120 1692 0 1483 7 0 7 7 0 8 0 lockfpl 104 37 0 34 1 0 1 1 0 8 0 lockfspl 48 17 0 14 1 0 1 1 0 8 0 sessionpl 144 29 0 21 1 0 1 1 0 8 0 pgrppl 48 38 0 22 1 0 1 1 0 8 0 ucredpl 104 166 0 155 1 0 1 1 0 8 0 zombiepl 144 460 0 460 1 0 1 1 0 8 1 processpl 1152 498 0 458 4 0 4 4 0 8 0 procpl 664 578 0 531 5 0 5 5 0 8 0 sosppl 176 3 0 3 1 1 0 1 0 8 0 sockpl 552 185 0 159 4 1 3 3 0 8 0 mcl64k 65536 53 0 53 2 1 1 1 0 8 1 mcl16k 16384 18 0 18 2 1 1 1 0 8 1 mcl12k 12288 7 0 7 2 1 1 1 0 8 1 mcl9k128 9344 6 0 6 1 1 0 1 0 8 0 mcl8k 8192 22 0 22 2 1 1 1 0 8 1 mcl4k 4096 2630 0 2576 14 7 7 14 0 8 0 mcl2k 2048 139 0 139 2 1 1 1 0 8 1 mtagpl 96 5 0 4 1 0 1 1 0 8 0 mbufpl 256 5087 0 4936 11 0 11 11 0 8 0 bufpl 280 2501 0 102 172 0 172 172 0 8 0 anonpl 24 99697 0 96359 32 9 23 32 0 186 0 amapchunkpl 152 9730 0 9344 25 5 20 23 0 158 0 amappl16 200 1771 0 1720 6 3 3 5 0 8 0 amappl15 192 50 0 50 1 1 0 1 0 8 0 amappl14 184 420 0 418 1 0 1 1 0 8 0 amappl13 176 126 0 116 1 0 1 1 0 8 0 amappl12 168 723 0 698 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 61 0 50 1 0 1 1 0 8 0 amappl9 144 269 0 269 1 1 0 1 0 8 0 amappl8 136 98 0 97 1 0 1 1 0 8 0 amappl7 128 142 0 131 1 0 1 1 0 8 0 amappl6 120 176 0 175 1 0 1 1 0 8 0 amappl5 112 91 0 84 1 0 1 1 0 8 0 amappl4 104 267 0 252 1 0 1 1 0 8 0 amappl3 96 1795 0 1707 3 0 3 3 0 8 0 amappl2 88 520 0 470 2 0 2 2 0 8 0 amappl1 80 10413 0 9874 14 1 13 14 0 8 1 amappl 88 2742 0 2607 4 0 4 4 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 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 6 0 6 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 485 0 458 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 485 0 458 1 0 1 1 0 8 0 vmmpekpl 168 5839 0 5806 2 0 2 2 0 8 0 vmmpepl 168 40179 0 38527 81 0 81 81 0 357 0 vmsppl 368 484 0 458 4 1 3 4 0 8 0 rwobjpl 40 14764 0 13830 11 1 10 11 0 8 0 pdppl 4096 976 0 916 96 30 66 82 0 8 6 pvpl 32 240646 0 232476 101 22 79 99 0 265 0 pmappl 216 484 0 458 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 364 0 49 10 0 10 10 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(ffffffff83413c90) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a6d02c8,ffff80002a7667d8) at vgonel+0x663 vrecycle(fffffd806a6d02c8,ffff80002a7667d8) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a7ef1f0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a6d02c8,ffff80002a7667d8) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806a6d02c8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c996a58,fffffd806a6d02c8,ffff80002a7ef358) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7667d8,ffffff9c,79bcb4bc8b10,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929 syscall(ffff80002a7ef4c0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7ef4c0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79bcb4bc8fc0, 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(ffffffff83413c90) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a6d02c8,ffff80002a7667d8) at vgonel+0x663 vrecycle(fffffd806a6d02c8,ffff80002a7667d8) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a7ef1f0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a6d02c8,ffff80002a7667d8) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806a6d02c8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c996a58,fffffd806a6d02c8,ffff80002a7ef358) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7667d8,ffffff9c,79bcb4bc8b10,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929 syscall(ffff80002a7ef4c0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7ef4c0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79bcb4bc8fc0, count: -11