panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *518858 15528 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b0d5f) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a83e210,ffff80002a789a00) at vgonel+0x663 vrecycle(fffffd806a83e210,ffff80002a789a00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a81f170) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a83e210,ffff80002a789a00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806a83e210) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806a83ed08,fffffd806a83e210,ffff80002a81f2d8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a789a00,ffffff9c,739ea3abf8b0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923 syscall(ffff80002a81f440) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a81f440) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x739ea3abfd60, 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(ffffffff833b0d5f) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a83e210,ffff80002a789a00) at vgonel+0x663 vrecycle(fffffd806a83e210,ffff80002a789a00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a81f170) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a83e210,ffff80002a789a00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806a83e210) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806a83ed08,fffffd806a83e210,ffff80002a81f2d8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a789a00,ffffff9c,739ea3abf8b0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923 syscall(ffff80002a81f440) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a81f440) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x739ea3abfd60, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a81efb0 rbx 0xfffffd806a83e210 rdx 0 rcx 0 rax 0xffff80002a789a00 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6749a36e6c78db64 r11 0x569573bfc87ede21 r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff81417c15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a81efa0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=518858 pid=15528 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=0xffff80002a788d08,0xffff80002a746a78 process=0xffff80002a7ac010 user=0xffff80002a81a000, vmspace=0xfffffd807ecda8a0 estcpu=36, cpticks=7, pctcpu=0.0, user=1, sys=6, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 80792 381022 17350 0 2 0 syz-executor 80792 137116 17350 0 3 0x4000080 sbwait syz-executor 80792 172605 17350 0 3 0x4000000 inode syz-executor 58976 238234 64805 0 3 0x82 piperd syz-executor 31400 512608 1 0 3 0x100083 ttyopn getty 63772 27097 64805 0 3 0x82 nanoslp syz-executor 17414 66233 64805 0 3 0x82 piperd syz-executor 87012 355023 64805 0 3 0x82 piperd syz-executor 96103 67548 64805 0 3 0x82 piperd syz-executor *15528 518858 64805 0 7 0x2 syz-executor 17350 278193 64805 0 3 0x82 nanoslp syz-executor 64805 495807 40835 0 3 0x82 wait syz-executor 40835 106271 59849 0 3 0x10008a sigsusp ksh 59849 508985 93786 0 3 0x98 kqread sshd-session 93786 50667 16198 0 3 0x92 kqread sshd-session 16198 361757 1 0 3 0x88 kqread sshd 77825 356774 4302 73 3 0x1100090 kqread syslogd 4302 159628 1 0 3 0x100082 sbwait syslogd 76953 541 1 0 3 0x100080 kqread resolvd 76240 399292 77790 77 3 0x100092 kqread dhcpleased 91697 459608 77790 77 3 0x100092 kqread dhcpleased 77790 265479 1 0 3 0x80 kqread dhcpleased 43156 50148 0 0 3 0x14200 bored smr 75242 158580 0 0 2 0x14200 zerothread 68087 335303 0 0 3 0x14200 aiodoned aiodoned 42503 524196 0 0 3 0x14200 syncer update 21143 431671 0 0 3 0x14200 cleaner cleaner 66233 55160 0 0 3 0x14200 reaper reaper 25956 350941 0 0 3 0x14200 pgdaemon pagedaemon 32890 184268 0 0 3 0x14200 bored viomb 37840 458831 0 0 3 0x40014200 acpi0 acpi0 43100 380000 0 0 3 0x14200 bored softnet0 41901 38609 0 0 3 0x14200 bored systqmp 16752 50959 0 0 3 0x14200 bored systq 99633 176824 0 0 3 0x40014200 tmoslp softclock 81987 373528 0 0 3 0x40014200 idle0 1 285758 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 11050 12237K 12338K 166960K 12561 0 pcb 17 13K 14K 166960K 112 0 rtable 230 6K 8K 166960K 479 0 pf 33 13K 21K 166960K 74 0 ifaddr 44 7K 8K 166960K 62 0 ifgroup 54 2K 2K 166960K 74 0 sysctl 3 1K 9K 166960K 9 0 counters 34 17K 18K 166960K 41 0 ioctlops 0 0K 4K 166960K 94 0 iov 0 0K 16K 166960K 23 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1359 85K 86K 166960K 1930 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 37 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 12 41K 93K 166960K 507 0 sigio 0 0K 0K 166960K 5 0 proc 60 59K 91K 166960K 591 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 46 0 in_multi 102 7K 7K 166960K 142 0 ether_multi 1 0K 0K 166960K 4 0 mrt 2 0K 0K 166960K 24 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 419 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 188 150K 169K 166960K 6451 0 UVM aobj 17 2K 4K 166960K 18 0 pinsyscall 33 66K 95K 166960K 1661 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 18 0 NDP 14 0K 2K 166960K 39 0 temp 49 9068K 9136K 166960K 30962 0 kqueue 13 20K 28K 166960K 94 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 66 0 63 1 0 1 1 0 8 0 rtentry 136 138 0 38 4 0 4 4 0 8 0 unpcb 144 186 0 169 1 0 1 1 0 8 0 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpqe 32 3 0 3 1 0 1 1 0 8 1 tcpcb 736 197 0 190 4 0 4 4 0 8 3 arp 96 22 0 4 1 0 1 1 0 8 0 inpcb 328 541 0 530 10 0 10 10 0 8 8 nd6 112 32 0 8 1 0 1 1 0 8 0 pkpcb 40 5 0 5 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1072 4 0 4 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 5 0 0 1 0 1 1 0 482 0 pffrnode 88 5 0 0 1 0 1 1 0 8 0 pffrent 40 9 0 3 1 0 1 1 0 8 0 pfrktable 1344 4 0 4 1 0 1 1 0 8 1 pfanchor 1288 3 0 2 1 0 1 1 0 8 0 pfstkey 128 2 0 2 1 0 1 1 0 8 1 pfstate 384 1 0 1 1 0 1 1 0 8 1 pfrule 1360 1 0 1 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 603 0 157 32 0 32 32 0 8 3 art_table 40 604 0 157 6 0 6 6 0 8 0 art_node 32 137 0 47 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 35 0 25 1 0 1 1 0 8 0 shmpl 112 15 0 1 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2428 0 969 92 0 92 92 0 8 0 ffsino 256 2428 0 969 92 0 92 92 0 8 0 nchpl 144 3106 0 1408 64 0 64 64 0 8 0 vnodes 216 2734 0 0 152 0 152 152 0 8 0 namei 1024 10125 0 10124 4 2 2 2 0 8 1 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 kstatmem 264 39 0 14 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 9408 0 9408 10 2 8 8 1 8 8 plimitpl 152 140 0 124 1 0 1 1 0 8 0 sigapl 424 797 0 760 6 0 6 6 0 8 0 knotepl 120 115440 0 115393 15 4 11 15 0 8 8 kqueuepl 184 124 0 115 1 0 1 1 0 8 0 pipepl 304 151 0 124 3 0 3 3 0 8 0 fdescpl 448 784 0 760 5 0 5 5 0 8 1 filepl 120 4448 0 4236 11 0 11 11 0 8 0 lockfpl 104 272 0 268 2 0 2 2 0 8 1 lockfspl 48 128 0 125 1 0 1 1 0 8 0 sessionpl 144 44 0 35 1 0 1 1 0 8 0 pgrppl 48 58 0 42 1 0 1 1 0 8 0 ucredpl 104 1214 0 1202 1 0 1 1 0 8 0 zombiepl 144 1048 0 1046 2 1 1 1 0 8 0 processpl 1152 797 0 760 4 0 4 4 0 8 0 procpl 664 1456 0 1417 6 0 6 6 0 8 0 sockpl 552 849 0 818 10 0 10 10 0 8 7 mcl64k 65536 18 0 17 1 0 1 1 0 8 0 mcl16k 16384 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 10 0 10 2 1 1 1 0 8 1 mcl4k 4096 3026 0 2974 14 5 9 14 0 8 2 mcl2k 2048 487 0 485 4 1 3 3 0 8 2 mtagpl 96 7 0 5 2 1 1 1 0 8 0 mbufpl 256 7894 0 7714 19 0 19 19 0 8 2 bufpl 280 3048 0 105 211 0 211 211 0 8 0 anonpl 24 142781 0 137579 59 4 55 55 0 187 13 amapchunkpl 152 21039 0 20613 37 1 36 36 0 158 11 amappl16 200 2338 0 2260 9 4 5 5 0 8 0 amappl15 192 7 0 6 2 1 1 1 0 8 0 amappl14 184 430 0 429 1 0 1 1 0 8 0 amappl13 176 124 0 114 1 0 1 1 0 8 0 amappl12 168 1062 0 1038 2 0 2 2 0 8 0 amappl11 160 11 0 11 1 1 0 1 0 8 0 amappl10 152 58 0 48 1 0 1 1 0 8 0 amappl9 144 265 0 264 1 0 1 1 0 8 0 amappl8 136 121 0 119 1 0 1 1 0 8 0 amappl7 128 150 0 138 1 0 1 1 0 8 0 amappl6 120 167 0 165 1 0 1 1 0 8 0 amappl5 112 104 0 96 1 0 1 1 0 8 0 amappl4 104 270 0 254 1 0 1 1 0 8 0 amappl3 96 3933 0 3856 4 0 4 4 0 8 0 amappl2 88 571 0 515 2 0 2 2 0 8 0 amappl1 80 11597 0 11063 15 0 15 15 0 8 2 amappl 88 5635 0 5509 5 0 5 5 0 92 0 uvmvnodes 80 110 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 0 1 1 0 8 1 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 128 254 0 254 2 1 1 1 0 8 1 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 17 0 1 1 0 1 1 0 8 0 uaddrrnd 24 784 0 760 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 784 0 760 1 0 1 1 0 8 0 vmmpekpl 168 8379 0 8337 2 0 2 2 0 8 0 vmmpepl 168 58449 0 56861 95 2 93 93 0 357 7 vmsppl 368 783 0 760 4 1 3 4 0 8 0 rwobjpl 40 19075 0 18082 13 0 13 13 0 8 1 pdppl 4096 1574 0 1520 104 36 68 80 0 8 14 pvpl 32 370747 0 360784 138 2 136 136 0 265 28 pmappl 216 783 0 760 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 389 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(ffffffff833b0d5f) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a83e210,ffff80002a789a00) at vgonel+0x663 vrecycle(fffffd806a83e210,ffff80002a789a00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a81f170) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a83e210,ffff80002a789a00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806a83e210) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806a83ed08,fffffd806a83e210,ffff80002a81f2d8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a789a00,ffffff9c,739ea3abf8b0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923 syscall(ffff80002a81f440) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a81f440) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x739ea3abfd60, 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(ffffffff833b0d5f) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806a83e210,ffff80002a789a00) at vgonel+0x663 vrecycle(fffffd806a83e210,ffff80002a789a00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a81f170) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806a83e210,ffff80002a789a00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806a83e210) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806a83ed08,fffffd806a83e210,ffff80002a81f2d8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a789a00,ffffff9c,739ea3abf8b0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1923 syscall(ffff80002a81f440) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a81f440) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x739ea3abfd60, count: -11