login: panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *190715 94756 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834161b0) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c743a30,ffff80002a7367d0) at vgonel+0x663 vrecycle(fffffd806c743a30,ffff80002a7367d0) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a8673c0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c743a30,ffff80002a7367d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c743a30) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c7431c0,fffffd806c743a30,ffff80002a867528) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7367d0,ffffff9c,7f2580460c50,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929 syscall(ffff80002a867690) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a867690) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f2580461100, 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(ffffffff834161b0) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c743a30,ffff80002a7367d0) at vgonel+0x663 vrecycle(fffffd806c743a30,ffff80002a7367d0) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a8673c0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c743a30,ffff80002a7367d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c743a30) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c7431c0,fffffd806c743a30,ffff80002a867528) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7367d0,ffffff9c,7f2580460c50,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929 syscall(ffff80002a867690) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a867690) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f2580461100, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a867200 rbx 0xfffffd806c743a30 rdx 0 rcx 0 rax 0xffff80002a7367d0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x8d009188fe53fe96 r11 0xb6593d2c7b576f43 r12 0 r13 0x6000 __ALIGN_SIZE+0x5000 r14 0 r15 0x1 rip 0xffffffff822fd3c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a8671f0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=190715 pid=94756 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=0xffff80002a736f98,0xffff80002a736d10 process=0xffff80002a79f190 user=0xffff80002a862000, vmspace=0xfffffd807384ca18 estcpu=36, cpticks=7, pctcpu=0.0, user=0, sys=5, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 13331 116436 74689 0 2 0x4000000 syz-executor 13331 138055 74689 0 3 0x4000080 fsleep syz-executor 3068 310466 63532 0 2 0 syz-executor 3068 328800 63532 0 3 0x4000080 fsleep syz-executor 65031 321326 84712 0 2 0 syz-executor 65031 297989 84712 0 3 0x4000080 fsleep syz-executor 89482 421120 1 0 3 0x82 nanoslp getty 6433 334387 10653 0 2 0 syz-executor 6433 156989 10653 0 3 0x4000080 fsleep syz-executor 6433 479160 10653 0 2 0x4000000 syz-executor 45303 481154 44402 0 2 0 syz-executor 45303 147462 44402 0 3 0x4000088 kqpoll syz-executor 45303 452275 44402 0 2 0x4000000 syz-executor 33595 347006 46707 0 2 0 syz-executor 33595 184705 46707 0 2 0x4000000 syz-executor 33595 291098 46707 0 3 0x4000080 fsleep syz-executor 33595 101877 46707 0 3 0x4000080 fsleep syz-executor 55860 286283 23146 -1 2 0x82010 syz-executor 55860 419309 23146 -1 4 0x4082010 syz-executor 55860 325125 23146 -1 3 0x4002010 suspend syz-executor 97705 170201 0 0 3 0x14200 acct acct 44422 306143 0 0 3 0x14280 nfsidl nfsio 30736 388691 0 0 3 0x14280 nfsidl nfsio 51967 418859 0 0 3 0x14280 nfsidl nfsio 16035 70544 0 0 3 0x14280 nfsidl nfsio 33339 468336 0 0 3 0x14280 nfsidl nfsio 69841 490896 0 0 3 0x14280 nfsidl nfsio 66319 399997 0 0 3 0x14280 nfsidl nfsio 32792 399850 0 0 3 0x14280 nfsidl nfsio 3598 152557 0 0 3 0x14280 nfsidl nfsio 89319 141174 0 0 3 0x14280 nfsidl nfsio 97125 371513 0 0 3 0x14280 nfsidl nfsio 47914 92680 0 0 3 0x14280 nfsidl nfsio 23667 214512 0 0 3 0x14280 nfsidl nfsio 2211 106016 0 0 3 0x14280 nfsidl nfsio 41286 56220 0 0 3 0x14280 nfsidl nfsio 21822 216829 0 0 3 0x14280 nfsidl nfsio 77788 507714 0 0 3 0x14280 nfsidl nfsio 65989 175041 0 0 3 0x14280 nfsidl nfsio 37991 42852 0 0 3 0x14280 nfsidl nfsio 94694 2865 0 0 3 0x14280 nfsidl nfsio 23146 246061 61048 0 3 0x82 nanoslp syz-executor 63532 32201 61048 0 3 0x82 nanoslp syz-executor *94756 190715 61048 0 7 0x2 syz-executor 74689 316020 61048 0 3 0x82 nanoslp syz-executor 46707 245426 61048 0 3 0x82 nanoslp syz-executor 84712 46813 61048 0 3 0x82 nanoslp syz-executor 10653 461340 61048 0 3 0x82 nanoslp syz-executor 44402 229469 61048 0 3 0x82 nanoslp syz-executor 61048 50308 68310 0 3 0x82 kqread syz-executor 68310 367729 88924 0 3 0x10008a sigsusp ksh 88924 433597 79342 0 3 0x98 kqread sshd-session 79342 472062 24109 0 3 0x92 kqread sshd-session 24109 86209 1 0 3 0x88 kqread sshd 81590 386913 51560 73 3 0x1100090 kqread syslogd 51560 32769 1 0 3 0x100082 sbwait syslogd 87378 213082 1 0 3 0x100080 kqread resolvd 10088 132243 53759 77 3 0x100092 kqread dhcpleased 37517 312246 53759 77 3 0x100092 kqread dhcpleased 53759 73644 1 0 3 0x80 kqread dhcpleased 63309 464124 0 0 3 0x14200 bored smr 3910 380934 0 0 2 0x14200 zerothread 23315 415326 0 0 3 0x14200 aiodoned aiodoned 4940 183748 0 0 3 0x14200 syncer update 47588 67499 0 0 3 0x14200 cleaner cleaner 49787 390821 0 0 3 0x14200 reaper reaper 90889 236165 0 0 3 0x14200 pgdaemon pagedaemon 17858 432520 0 0 3 0x14200 bored viomb 20255 32030 0 0 3 0x40014200 acpi0 acpi0 71890 439057 0 0 3 0x14200 bored softnet0 24931 157724 0 0 3 0x14200 bored systqmp 65207 184774 0 0 3 0x14200 bored systq 15237 47447 0 0 3 0x40014200 tmoslp softclock 57784 268204 0 0 3 0x40014200 idle0 1 53014 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 12111K 12318K 166960K 12233 0 pcb 19 13K 14K 166960K 83 0 rtable 223 6K 6K 166960K 373 0 pf 31 13K 14K 166960K 48 0 ifaddr 38 6K 7K 166960K 47 0 ifgroup 46 2K 2K 166960K 59 0 sysctl 3 1K 9K 166960K 9 0 counters 32 17K 17K 166960K 36 0 ioctlops 0 0K 4K 166960K 52 0 iov 0 0K 13K 166960K 8 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1292 81K 82K 166960K 1467 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 10 0 dirhash 12 2K 3K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 266 0 sigio 0 0K 0K 166960K 1 0 proc 60 59K 116K 166960K 517 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 10 0 in_multi 88 6K 7K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 386 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 221 159K 173K 166960K 4172 0 UVM aobj 11 2K 2K 166960K 11 0 pinsyscall 38 76K 96K 166960K 1374 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 10 0K 2K 166960K 30 0 temp 40 9103K 9170K 166960K 13495 0 kqueue 13 20K 26K 166960K 53 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 42 0 39 1 0 1 1 0 8 0 rtentry 136 112 0 12 4 0 4 4 0 8 0 unpcb 144 90 0 73 1 0 1 1 0 8 0 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 36 0 32 1 0 1 1 0 8 0 arp 96 18 0 2 1 0 1 1 0 8 0 inpcb 328 168 0 159 5 1 4 4 0 8 3 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 112 24 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 3 0 3 1 0 1 1 0 8 1 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfrule 1360 5 0 4 2 1 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 453 0 44 29 0 29 29 0 8 1 art_table 40 455 0 44 5 0 5 5 0 8 0 art_node 32 112 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 0 1 1 0 8 1 semapl 72 8 0 3 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1816 0 356 92 0 92 92 0 8 0 ffsino 256 1816 0 356 92 0 92 92 0 8 0 nchpl 144 2199 0 504 64 0 64 64 0 8 0 vnodes 216 1950 0 0 109 0 109 109 0 8 0 namei 1024 6569 0 6569 4 2 2 2 0 8 2 kstatmem 264 29 0 8 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 7825 0 7825 8 7 1 8 1 8 1 plimitpl 152 49 0 33 1 0 1 1 0 8 0 sigapl 424 584 0 521 8 0 8 8 0 8 0 knotepl 120 6902 0 6855 3 0 3 3 0 8 1 kqueuepl 184 63 0 51 1 0 1 1 0 8 0 pipepl 304 136 0 109 3 0 3 3 0 8 0 fdescpl 448 550 0 521 5 1 4 5 0 8 0 filepl 120 2197 0 1961 8 0 8 8 0 8 0 lockfpl 104 65 0 61 1 0 1 1 0 8 0 lockfspl 48 28 0 24 1 0 1 1 0 8 0 sessionpl 144 27 0 20 1 0 1 1 0 8 0 pgrppl 48 35 0 20 1 0 1 1 0 8 0 ucredpl 104 263 0 251 1 0 1 1 0 8 0 zombiepl 144 632 0 632 2 1 1 1 0 8 1 processpl 1152 584 0 521 5 0 5 5 0 8 0 procpl 664 848 0 772 8 0 8 8 0 8 1 sockpl 552 309 0 278 6 1 5 5 0 8 2 mcl64k 65536 19 0 19 2 1 1 1 0 8 1 mcl16k 16384 12 0 12 2 1 1 1 0 8 1 mcl12k 12288 3 0 3 2 1 1 1 0 8 1 mcl9k128 9344 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 11 0 11 2 1 1 1 0 8 1 mcl4k 4096 2723 0 2674 15 7 8 14 0 8 1 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 227 0 226 1 0 1 1 0 8 0 mtagpl 96 5 0 5 2 1 1 1 0 8 1 mbufpl 256 5530 0 5359 12 1 11 11 0 8 0 bufpl 280 2728 0 103 188 0 188 188 0 8 0 anonpl 24 107921 0 104510 33 2 31 31 0 186 9 amapchunkpl 152 12506 0 12043 28 0 28 28 0 158 9 amappl16 200 1933 0 1893 6 3 3 5 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 503 0 502 1 0 1 1 0 8 0 amappl13 176 118 0 108 1 0 1 1 0 8 0 amappl12 168 868 0 840 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 65 0 54 1 0 1 1 0 8 0 amappl9 144 270 0 270 1 1 0 1 0 8 0 amappl8 136 91 0 90 1 0 1 1 0 8 0 amappl7 128 146 0 135 1 0 1 1 0 8 0 amappl6 120 151 0 149 1 0 1 1 0 8 0 amappl5 112 93 0 85 1 0 1 1 0 8 0 amappl4 104 263 0 245 1 0 1 1 0 8 0 amappl3 96 2355 0 2248 4 0 4 4 0 8 0 amappl2 88 619 0 565 2 0 2 2 0 8 0 amappl1 80 10766 0 10224 13 0 13 13 0 8 0 amappl 88 3447 0 3289 5 0 5 5 0 92 0 uvmvnodes 80 101 0 0 3 0 3 3 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 550 0 521 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 550 0 521 1 0 1 1 0 8 0 vmmpekpl 168 6515 0 6482 3 0 3 3 0 8 1 vmmpepl 168 44411 0 42630 83 2 81 81 0 357 1 vmsppl 368 549 0 521 4 1 3 4 0 8 0 rwobjpl 40 15830 0 14870 11 0 11 11 0 8 0 pdppl 4096 1106 0 1042 100 34 66 82 0 8 2 pvpl 32 268592 0 259447 86 3 83 83 0 265 6 pmappl 216 549 0 521 3 1 2 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 373 0 53 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(ffffffff834161b0) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c743a30,ffff80002a7367d0) at vgonel+0x663 vrecycle(fffffd806c743a30,ffff80002a7367d0) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a8673c0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c743a30,ffff80002a7367d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c743a30) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c7431c0,fffffd806c743a30,ffff80002a867528) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7367d0,ffffff9c,7f2580460c50,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929 syscall(ffff80002a867690) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a867690) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f2580461100, 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(ffffffff834161b0) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c743a30,ffff80002a7367d0) at vgonel+0x663 vrecycle(fffffd806c743a30,ffff80002a7367d0) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a8673c0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c743a30,ffff80002a7367d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c743a30) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c7431c0,fffffd806c743a30,ffff80002a867528) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7367d0,ffffff9c,7f2580460c50,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1929 syscall(ffff80002a867690) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a867690) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f2580461100, count: -11