panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *468984 48045 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8330f708) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805e6a5eb0,ffff80002a7b9a00) at vgonel+0x663 vrecycle(fffffd805e6a5eb0,ffff80002a7b9a00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a831400) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805e6a5eb0,ffff80002a7b9a00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd805e6a5eb0) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806f8d1cc0,fffffd805e6a5eb0,ffff80002a831568) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7b9a00,ffffff9c,7a2e4de50d40,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8316d0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8316d0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a2e4de511f0, 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(ffffffff8330f708) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805e6a5eb0,ffff80002a7b9a00) at vgonel+0x663 vrecycle(fffffd805e6a5eb0,ffff80002a7b9a00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a831400) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805e6a5eb0,ffff80002a7b9a00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd805e6a5eb0) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806f8d1cc0,fffffd805e6a5eb0,ffff80002a831568) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7b9a00,ffffff9c,7a2e4de50d40,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8316d0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8316d0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a2e4de511f0, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a831240 rbx 0xfffffd805e6a5eb0 rdx 0 rcx 0 rax 0xffff80002a7b9a00 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4b525b49945a6196 r11 0x44176c95fd213e76 r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff82fe5185 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a831230 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=468984 pid=48045 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=82, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7b8a70,0xffff80002a7b9ca8 process=0xffff80002a7dcd90 user=0xffff80002a82c000, vmspace=0xfffffd807e9c1e60 estcpu=36, cpticks=15, pctcpu=0.0, user=5, sys=10, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 88066 305347 63816 0 2 0 syz-executor 88066 175575 63816 0 3 0x4000080 fsleep syz-executor 90017 53931 61883 0 2 0 syz-executor 90017 497419 61883 0 3 0x4000080 fsleep syz-executor 97937 193962 16986 0 2 0 syz-executor 97937 412618 16986 0 3 0x4000080 fsleep syz-executor 97937 496154 16986 0 2 0x4000000 syz-executor 94849 241233 89940 0 2 0 syz-executor 94849 379939 89940 0 3 0x4000080 fsleep syz-executor 44880 457486 605 0 2 0 syz-executor 44880 296710 605 0 3 0x4000080 fsleep syz-executor 44880 102752 605 0 3 0x4000080 fsleep syz-executor 44880 68387 605 0 3 0x4000080 fsleep syz-executor 56585 307989 1 0 3 0x100083 ttyopn getty 16986 63961 9301 0 3 0x82 nanoslp syz-executor 605 111827 9301 0 3 0x82 nanoslp syz-executor 91291 493055 9301 0 3 0x82 wait syz-executor 86183 519675 0 0 3 0x14280 nfsidl nfsio 71288 520234 0 0 3 0x14280 nfsidl nfsio 29522 199498 0 0 3 0x14280 nfsidl nfsio 49670 505048 0 0 3 0x14280 nfsidl nfsio 39858 478696 0 0 3 0x14280 nfsidl nfsio 63339 66847 0 0 3 0x14280 nfsidl nfsio 69378 231051 0 0 3 0x14280 nfsidl nfsio 69634 413498 0 0 3 0x14280 nfsidl nfsio 81329 81711 0 0 3 0x14280 nfsidl nfsio 59702 66683 0 0 3 0x14280 nfsidl nfsio 25485 81142 0 0 3 0x14280 nfsidl nfsio 94054 433771 0 0 3 0x14280 nfsidl nfsio 88760 35671 0 0 3 0x14280 nfsidl nfsio 81951 343133 0 0 3 0x14280 nfsidl nfsio 84456 14641 0 0 3 0x14280 nfsidl nfsio 61555 353655 0 0 3 0x14280 nfsidl nfsio 58506 82522 0 0 3 0x14280 nfsidl nfsio 27908 326869 0 0 3 0x14280 nfsidl nfsio 87172 402934 0 0 3 0x14280 nfsidl nfsio 84905 124678 0 0 3 0x14280 nfsidl nfsio 63816 518983 9301 0 3 0x82 nanoslp syz-executor 61883 2384 9301 0 3 0x82 nanoslp syz-executor 29996 210459 9301 0 3 0x82 wait syz-executor *48045 468984 9301 0 7 0x2 syz-executor 89940 20825 9301 0 3 0x82 nanoslp syz-executor 9301 9675 21078 0 3 0x82 kqread syz-executor 21078 181419 81388 0 3 0x10008a sigsusp ksh 81388 208986 66348 0 3 0x98 kqread sshd-session 66348 358850 56024 0 3 0x92 kqread sshd-session 56024 293754 1 0 3 0x88 kqread sshd 95224 485322 83516 73 3 0x1100090 kqread syslogd 83516 257344 1 0 3 0x100082 sbwait syslogd 19580 140430 1 0 3 0x100080 kqread resolvd 77227 52294 83920 77 3 0x100092 kqread dhcpleased 95679 416110 83920 77 3 0x100092 kqread dhcpleased 83920 478830 1 0 3 0x80 kqread dhcpleased 55466 213167 0 0 3 0x14200 bored smr 43266 303292 0 0 2 0x14200 zerothread 48542 157249 0 0 3 0x14200 aiodoned aiodoned 77719 103885 0 0 3 0x14200 syncer update 75198 253435 0 0 3 0x14200 cleaner cleaner 65606 124731 0 0 3 0x14200 reaper reaper 69598 333758 0 0 3 0x14200 pgdaemon pagedaemon 12378 121749 0 0 3 0x14200 bored viomb 91203 489867 0 0 3 0x40014200 acpi0 acpi0 49179 264696 0 0 3 0x14200 bored softnet0 4976 454639 0 0 3 0x14200 bored systqmp 93668 53853 0 0 3 0x14200 bored systq 80712 214644 0 0 3 0x40014200 tmoslp softclock 53561 290326 0 0 3 0x40014200 idle0 1 523967 0 0 3 0x82 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 11078 12191K 12702K 166960K 16443 0 pcb 17 16K 20K 166960K 537 0 rtable 231 11K 12K 166960K 760 0 pf 34 13K 15K 166960K 193 0 ifaddr 36 6K 7K 166960K 137 0 ifgroup 57 2K 2K 166960K 217 0 sysctl 4 1K 9K 166960K 20 0 counters 34 17K 18K 166960K 178 0 ioctlops 0 0K 4K 166960K 625 0 iov 0 0K 24K 166960K 141 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1557 98K 99K 166960K 3833 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 26 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 141 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1933 0 sigio 0 0K 0K 166960K 40 0 proc 60 59K 124K 166960K 773 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 419 0 in_multi 73 5K 7K 166960K 211 0 ether_multi 1 0K 0K 166960K 18 0 mrt 0 0K 0K 166960K 18 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 932 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 236 151K 171K 166960K 18843 0 UVM aobj 87 13K 17K 166960K 92 0 pinsyscall 38 76K 96K 166960K 3151 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 125 0 NDP 12 0K 2K 166960K 98 0 temp 83 8672K 8928K 166960K 86201 0 kqueue 13 20K 32K 166960K 311 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 120 250 0 247 2 1 1 2 0 8 0 rtentry 136 219 0 136 4 0 4 4 0 8 0 unpcb 144 1702 0 1685 9 6 3 7 0 8 2 syncache 336 14 0 14 1 1 0 1 0 8 0 tcpqe 32 4 0 4 1 1 0 1 0 8 0 tcpcb 736 789 0 782 11 6 5 7 0 8 4 arp 96 38 0 23 1 0 1 1 0 8 0 ipq 40 9 0 7 1 0 1 1 0 8 0 ipqe 40 14 0 12 1 0 1 1 0 8 0 inpcb 328 2072 0 2062 10 5 5 7 0 8 3 ip6q 72 71 0 69 1 0 1 1 0 8 0 ip6af 40 141 0 139 1 0 1 1 0 8 0 nd6 112 46 0 26 1 0 1 1 0 8 0 pkpcb 40 12 0 12 1 1 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1072 130 0 130 1 1 0 1 0 8 0 pppxif 1384 6 0 6 1 1 0 1 0 8 0 pfstkey 128 2 0 2 1 1 0 1 0 8 0 pfstate 384 1 0 1 1 1 0 1 0 8 0 pfrule 1344 4 0 4 1 1 0 1 0 8 0 rttmr 136 5 0 5 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 894 0 541 29 5 24 29 0 8 0 art_table 40 898 0 541 5 0 5 5 0 8 0 art_node 32 218 0 147 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 135 0 125 1 0 1 1 0 8 0 shmpl 112 82 0 2 3 0 3 3 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 5147 0 3646 95 0 95 95 0 8 0 ffsino 256 5147 0 3646 95 0 95 95 0 8 0 nchpl 144 7806 0 6110 64 0 64 64 0 8 0 rtmask 32 9 0 9 1 1 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 29276 0 29276 2 1 1 2 0 8 1 vcpupl 3904 6 0 2 1 0 1 1 0 8 0 vmpool 808 7 0 3 1 0 1 1 0 8 0 kstatmem 264 148 0 124 3 1 2 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 7 0 7 1 1 0 1 0 8 0 scxspl 216 32552 0 32552 8 7 1 8 1 8 1 plimitpl 152 795 0 779 1 0 1 1 0 8 0 sigapl 424 2234 0 2172 8 0 8 8 0 8 0 knotepl 120 77529 0 77482 22 19 3 17 0 8 0 kqueuepl 184 662 0 653 4 3 1 4 0 8 0 pipepl 304 568 0 541 8 5 3 8 0 8 0 fdescpl 448 2198 0 2169 5 1 4 5 0 8 0 filepl 120 17013 0 16800 21 10 11 19 0 8 2 lockfpl 104 825 0 823 2 0 2 2 0 8 1 lockfspl 48 356 0 354 1 0 1 1 0 8 0 sessionpl 144 34 0 26 1 0 1 1 0 8 0 pgrppl 48 146 0 130 1 0 1 1 0 8 0 ucredpl 104 3329 0 3316 1 0 1 1 0 8 0 zombiepl 144 2200 0 2198 1 0 1 1 0 8 0 processpl 1152 2234 0 2172 5 0 5 5 0 8 0 procpl 664 4864 0 4794 7 0 7 7 0 8 0 sosppl 176 11 0 11 1 1 0 1 0 8 0 sockpl 552 4220 0 4190 21 13 8 16 0 8 5 mcl64k 65536 193 0 193 2 1 1 1 0 8 1 mcl12k 12288 2 0 2 1 1 0 1 0 8 0 mcl9k 9216 3 0 3 1 1 0 1 0 8 0 mcl8k 8192 91 0 91 1 1 0 1 0 8 0 mcl4k 4096 4789 0 4736 14 6 8 14 0 8 1 mcl2k 2048 3045 0 3038 5 3 2 5 0 8 0 mtagpl 96 122 0 82 2 0 2 2 0 8 0 mbufpl 256 26087 0 25930 126 111 15 76 0 8 0 bufpl 280 11677 0 5456 445 0 445 445 0 8 0 anonpl 24 326352 0 323091 60 27 33 60 0 187 0 amapchunkpl 152 64976 0 64477 36 14 22 34 0 158 0 amappl16 200 5574 0 5539 35 31 4 22 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 75 0 75 1 1 0 1 0 8 0 amappl13 176 456 0 455 1 0 1 1 0 8 0 amappl12 168 2589 0 2551 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 71 0 61 1 0 1 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 96 0 95 1 0 1 1 0 8 0 amappl6 120 322 0 309 1 0 1 1 0 8 0 amappl5 112 83 0 74 1 0 1 1 0 8 0 amappl4 104 471 0 445 1 0 1 1 0 8 0 amappl3 96 12826 0 12716 4 1 3 4 0 8 0 amappl2 88 650 0 592 2 0 2 2 0 8 0 amappl1 80 18794 0 18267 15 1 14 15 0 8 0 amappl 88 17681 0 17514 5 0 5 5 0 92 0 uvmvnodes 80 153 0 0 4 0 4 4 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 128 256 0 256 1 1 0 1 0 8 0 dma64 64 8 0 8 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 91 0 5 2 0 2 2 0 8 0 uaddrrnd 24 2198 0 2169 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2198 0 2169 1 0 1 1 0 8 0 vmmpekpl 168 18861 0 18823 2 0 2 2 0 8 0 vmmpepl 168 142938 0 141130 97 14 83 97 0 357 0 vmsppl 368 2197 0 2169 4 1 3 4 0 8 0 rwobjpl 40 37028 0 35938 15 0 15 15 0 8 0 pdppl 4096 4416 0 4348 126 56 70 82 0 8 2 pvpl 32 938403 0 929914 137 45 92 137 0 265 0 pmappl 216 2204 0 2172 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 527 0 195 12 0 12 12 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(ffffffff8330f708) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805e6a5eb0,ffff80002a7b9a00) at vgonel+0x663 vrecycle(fffffd805e6a5eb0,ffff80002a7b9a00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a831400) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805e6a5eb0,ffff80002a7b9a00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd805e6a5eb0) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806f8d1cc0,fffffd805e6a5eb0,ffff80002a831568) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7b9a00,ffffff9c,7a2e4de50d40,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8316d0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8316d0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a2e4de511f0, 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(ffffffff8330f708) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805e6a5eb0,ffff80002a7b9a00) at vgonel+0x663 vrecycle(fffffd805e6a5eb0,ffff80002a7b9a00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a831400) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805e6a5eb0,ffff80002a7b9a00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd805e6a5eb0) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806f8d1cc0,fffffd805e6a5eb0,ffff80002a831568) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7b9a00,ffffff9c,7a2e4de50d40,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8316d0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8316d0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a2e4de511f0, count: -11