panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *147621 41309 0 0x2 0 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83329b76) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd80631f2a78,ffff80003c4c47e0) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd80631f2a78,ffff80003c4c47e0) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff8000360a9f48) at ufs_inactive+0x360 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80631f2a78,ffff80003c4c47e0) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vput(fffffd80631f2a78) at vput+0xe5 sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd80796f17d8,fffffd80631f2a78,ffff8000360aa0c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80003c4c47e0,ffffff9c,7edd4cce2e10,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff8000360aa240) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000360aa240) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7edd4cce32c0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: missing alias ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83329b76) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd80631f2a78,ffff80003c4c47e0) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd80631f2a78,ffff80003c4c47e0) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff8000360a9f48) at ufs_inactive+0x360 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80631f2a78,ffff80003c4c47e0) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vput(fffffd80631f2a78) at vput+0xe5 sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd80796f17d8,fffffd80631f2a78,ffff8000360aa0c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80003c4c47e0,ffffff9c,7edd4cce2e10,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff8000360aa240) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000360aa240) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7edd4cce32c0, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000360a9d80 rbx 0xffffffff837fbdc7 cpu_info_full_primary+0x2dc7 rdx 0 rcx 0xffff80003c4c47e0 rax 0xffffffff837faff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb55cd6f2ed6ef9e2 r11 0x59e4d9b54f76eb3c r12 0xffffffff837fbbc8 cpu_info_full_primary+0x2bc8 r13 0 r14 0 r15 0x1 rip 0xffffffff82b64975 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000360a9d70 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=147621 pid=41309 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=0xffff80002a33bc50,0xffff80003c4eb760 process=0xffff80003c57d288 user=0xffff8000360a5000, vmspace=0xfffffd807eb8cab0 estcpu=36, cpticks=0, pctcpu=0.1, user=1, sys=22, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55596 337248 84348 0 2 0 syz-executor 55596 42156 84348 0 3 0x4000080 fsleep syz-executor 29217 124998 25367 0 3 0x80 nanoslp syz-executor 29217 412157 25367 0 3 0x4000080 fsleep syz-executor 29217 446121 25367 0 2 0x4000000 syz-executor 29217 120458 25367 0 3 0x4000080 fsleep syz-executor 33731 488177 91761 0 2 0 syz-executor 33731 3922 91761 0 2 0x4000000 syz-executor 33731 52706 91761 0 3 0x4000080 fsleep syz-executor 33731 433218 91761 0 3 0x4000080 fsleep syz-executor 29389 313883 69031 0 3 0x82 nanoslp syz-executor 76845 427040 42462 60929 2 0x10 syz-executor 76845 277710 42462 60929 2 0x4000010 syz-executor 76845 400818 42462 60929 3 0x4000090 fsleep syz-executor 25367 512296 69031 0 3 0x82 nanoslp syz-executor 37823 262984 69031 0 2 0x2 syz-executor 42462 122035 69031 0 3 0x82 nanoslp syz-executor 30020 127805 1 0 3 0x100083 ttyin getty *41309 147621 69031 0 7 0x2 syz-executor 91761 160892 69031 0 3 0x82 nanoslp syz-executor 84348 256609 69031 0 3 0x82 nanoslp syz-executor 55998 347514 0 0 3 0x14280 nfsidl nfsio 33986 329489 0 0 3 0x14280 nfsidl nfsio 68850 348151 0 0 3 0x14280 nfsidl nfsio 62645 312637 0 0 3 0x14280 nfsidl nfsio 2562 458173 0 0 3 0x14280 nfsidl nfsio 97364 326569 0 0 3 0x14280 nfsidl nfsio 86671 39787 0 0 3 0x14280 nfsidl nfsio 32106 354412 0 0 3 0x14280 nfsidl nfsio 28536 209185 0 0 3 0x14280 nfsidl nfsio 92383 100816 0 0 3 0x14280 nfsidl nfsio 66664 327272 0 0 3 0x14280 nfsidl nfsio 22756 208717 0 0 3 0x14280 nfsidl nfsio 71582 122112 0 0 3 0x14280 nfsidl nfsio 88380 147015 0 0 3 0x14280 nfsidl nfsio 70642 120442 0 0 3 0x14280 nfsidl nfsio 90464 115308 0 0 3 0x14280 nfsidl nfsio 67795 103128 0 0 3 0x14280 nfsidl nfsio 14927 104847 0 0 3 0x14280 nfsidl nfsio 4790 294608 0 0 3 0x14280 nfsidl nfsio 15091 491648 0 0 3 0x14280 nfsidl nfsio 81394 71912 0 0 3 0x14200 bored sosplice 80849 120991 25983 0 3 0x100082 sbwait ndp 25983 446987 34554 0 3 0x10008a sigsusp sh 34554 284442 69031 0 3 0x82 wait syz-executor 69031 346350 57010 0 3 0x82 kqread syz-executor 57010 299308 56386 0 3 0x10008a sigsusp ksh 56386 110543 8913 0 3 0x98 kqread sshd-session 8913 413954 22293 0 3 0x92 kqread sshd-session 22293 509907 1 0 3 0x88 kqread sshd 8910 103240 65276 74 3 0x1100092 bpf pflogd 65276 416135 1 0 3 0x80 sbwait pflogd 64711 544 67117 73 3 0x1100090 kqread syslogd 67117 333471 1 0 3 0x100082 sbwait syslogd 4547 56682 1 0 3 0x100080 kqread resolvd 80821 310285 29578 77 3 0x100092 kqread dhcpleased 66837 451162 29578 77 3 0x100092 kqread dhcpleased 29578 343049 1 0 3 0x80 kqread dhcpleased 48243 337307 0 0 3 0x14200 bored smr 51545 328893 0 0 2 0x14200 zerothread 47419 259390 0 0 3 0x14200 aiodoned aiodoned 20456 495372 0 0 3 0x14200 syncer update 54965 86539 0 0 3 0x14200 cleaner cleaner 93503 10985 0 0 3 0x14200 reaper reaper 34495 249632 0 0 3 0x14200 pgdaemon pagedaemon 42364 504472 0 0 3 0x14200 bored viomb 85145 435880 0 0 3 0x40014200 acpi0 acpi0 49619 305248 0 0 7 0x40014200 idle1 22753 23931 0 0 3 0x14200 bored softnet3 33721 359040 0 0 3 0x14200 bored softnet2 5430 428838 0 0 3 0x14200 bored softnet1 68226 220170 0 0 3 0x14200 bored softnet0 87423 394296 0 0 3 0x14200 bored systqmp 70834 302634 0 0 3 0x14200 bored systq 22950 57161 0 0 3 0x14200 tmoslp softclockmp 98253 89965 0 0 3 0x40014200 tmoslp softclock 42622 405063 0 0 3 0x40014200 idle0 1 68850 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 41309 (syz-executor) thread 0xffff80003c4c47e0 (147621) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10193 11026K 11601K 166960K 13589 0 pcb 17 17K 18K 166960K 229 0 rtable 185 8K 10K 166960K 723 0 pf 36 18K 22K 166960K 175 0 ifaddr 35 6K 7K 166960K 121 0 ifgroup 47 2K 2K 166960K 190 0 sysctl 4 1K 1K 166960K 6 0 counters 60 35K 37K 166960K 178 0 ioctlops 0 0K 4K 166960K 1836 0 iov 0 0K 16K 166960K 112 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1459 92K 92K 166960K 2799 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 21 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 152 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 114K 166960K 1726 0 sigio 1 0K 0K 166960K 25 0 proc 74 91K 128K 166960K 899 0 subproc 72 4K 4K 166960K 145 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 220 0 in_multi 74 5K 7K 166960K 226 0 ether_multi 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 727 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 244 162K 184K 166960K 15847 0 UVM aobj 42 6K 6K 166960K 46 0 pinsyscall 43 86K 103K 166960K 2988 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 64 0 NDP 10 0K 2K 166960K 85 0 temp 76 8691K 8815K 166960K 36736 0 kqueue 14 22K 32K 166960K 235 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 202 0 198 3 2 1 3 0 8 0 rtentry 168 225 0 148 5 0 5 5 0 8 0 unpcb 144 1424 0 1405 8 6 2 6 0 8 1 syncache 336 22 0 22 3 3 0 1 0 8 0 tcpqe 32 4 0 4 2 2 0 1 0 8 0 tcpcb 808 486 0 477 14 12 2 8 0 8 0 arp 120 38 0 24 1 0 1 1 0 8 0 inpcb 376 1811 0 1798 31 29 2 15 0 8 0 nd6 136 52 0 35 1 0 1 1 0 8 0 pkpcb 40 7 0 7 3 3 0 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1168 35 0 35 3 2 1 1 0 8 1 pppxif 1480 6 0 6 3 3 0 1 0 8 0 pfstscr 40 2 0 1 2 1 1 1 0 8 0 pffrag 232 10 0 0 1 0 1 1 0 482 0 pffrnode 88 8 0 0 1 0 1 1 0 8 0 pffrent 40 14 0 4 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 6 0 5 2 1 1 1 0 8 0 pfanchor 1288 3 0 1 1 0 1 1 0 8 0 pftag 88 4 0 2 1 0 1 1 0 8 0 pfstitem 24 88 0 37 1 0 1 1 0 8 0 pfstkey 128 94 0 43 2 0 2 2 0 8 0 pfstate 376 89 0 40 6 0 6 6 0 8 0 pfrule 1344 64 0 21 5 1 4 4 0 8 0 art_heap8 4096 3 0 1 3 1 2 3 0 8 0 art_heap4 256 872 0 541 30 8 22 29 0 8 1 art_table 32 875 0 542 4 0 4 4 0 8 0 art_node 16 221 0 153 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 17 2 1 1 1 0 8 0 semapl 112 148 0 138 1 0 1 1 0 8 0 shmpl 112 43 0 4 2 0 2 2 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 4100 0 2586 95 0 95 95 0 8 0 ffsino 280 4100 0 2586 109 0 109 109 0 8 0 nchpl 144 6225 0 4508 64 0 64 64 0 8 0 rtmask 32 5 0 5 3 3 0 1 0 8 0 uvmvnodes 80 5127 0 0 105 0 105 105 0 8 0 vnodes 216 5127 0 0 285 0 285 285 0 8 0 namei 1024 23634 0 23631 3 2 1 2 0 8 0 percpumem 16 103 0 59 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 106 0 86 2 0 2 2 0 8 0 scsiplug 72 7 0 7 4 4 0 1 0 8 0 scxspl 216 20391 0 20391 12 11 1 8 1 8 1 plimitpl 152 437 0 420 1 0 1 1 0 8 0 sigapl 424 1927 0 1857 10 1 9 9 0 8 0 futexpl 64 20816 0 20810 1 0 1 1 0 8 0 knotepl 120 579 0 0 18 0 18 18 0 8 0 kqueuepl 216 561 0 551 8 7 1 5 0 8 0 pipepl 328 234 0 205 3 0 3 3 0 8 0 fdescpl 504 1885 0 1854 5 0 5 5 0 8 0 filepl 152 12737 0 12512 22 9 13 17 0 8 2 lockfpl 104 468 0 462 2 1 1 2 0 8 0 lockfspl 48 213 0 208 1 0 1 1 0 8 0 sessionpl 144 51 0 42 1 0 1 1 0 8 0 pgrppl 48 188 0 171 1 0 1 1 0 8 0 ucredpl 104 2396 0 2381 1 0 1 1 0 8 0 zombiepl 144 2157 0 2156 1 0 1 1 0 8 0 processpl 1176 1927 0 1857 6 0 6 6 0 8 0 procpl 656 4125 0 4045 9 1 8 8 0 8 0 srpgc 96 18 0 18 4 3 1 1 0 8 1 sosppl 168 8 0 8 3 2 1 1 0 8 1 sockpl 688 3466 0 3430 36 30 6 16 0 8 1 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 33 0 0 5 0 5 5 0 8 0 mtagpl 96 23 0 0 1 0 1 1 0 8 0 mbufpl 256 3576 0 0 222 0 222 222 0 8 0 bufpl 280 5900 0 125 413 0 413 413 0 8 0 anonpl 24 248429 0 243312 106 61 45 58 0 184 0 amapchunkpl 152 51823 0 51296 36 10 26 31 0 158 0 amappl16 200 4436 0 4377 46 40 6 16 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 204 0 191 1 0 1 1 0 8 0 amappl13 176 7 0 7 2 2 0 1 0 8 0 amappl12 168 2681 0 2649 4 2 2 3 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 144 0 131 1 0 1 1 0 8 0 amappl6 120 367 0 363 1 0 1 1 0 8 0 amappl5 112 160 0 151 1 0 1 1 0 8 0 amappl4 104 411 0 388 1 0 1 1 0 8 0 amappl3 96 10641 0 10539 6 2 4 4 0 8 0 amappl2 88 906 0 838 2 0 2 2 0 8 0 amappl1 80 19122 0 18501 15 0 15 15 0 8 0 amappl 88 14636 0 14471 6 1 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 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 128 255 0 255 2 2 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 45 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1885 0 1854 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1885 0 1854 1 0 1 1 0 8 0 vmmpekpl 168 16577 0 16506 4 0 4 4 0 8 0 vmmpepl 168 126602 0 124591 125 25 100 107 0 357 1 vmsppl 456 1884 0 1854 5 0 5 5 0 8 0 rwobjpl 64 39389 0 33227 104 4 100 100 0 8 0 pdppl 4096 3778 0 3708 128 52 76 84 0 8 6 pvpl 32 16703 0 0 135 0 135 135 0 265 0 pmappl 248 1884 0 1854 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 540 0 87 14 0 14 14 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83329b76) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd80631f2a78,ffff80003c4c47e0) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd80631f2a78,ffff80003c4c47e0) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff8000360a9f48) at ufs_inactive+0x360 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80631f2a78,ffff80003c4c47e0) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vput(fffffd80631f2a78) at vput+0xe5 sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd80796f17d8,fffffd80631f2a78,ffff8000360aa0c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80003c4c47e0,ffffff9c,7edd4cce2e10,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff8000360aa240) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000360aa240) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7edd4cce32c0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029a9bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029a9bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029a9bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029a9bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5