panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *141666 43558 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832d56e9) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806b972368,ffff80002a787760) at vgonel+0x663 vrecycle(fffffd806b972368,ffff80002a787760) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a86cd70) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806b972368,ffff80002a787760) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806b972368) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd806b9725f0,fffffd806b972368,ffff80002a86ced8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a787760,ffffff9c,7c9d701dee30,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86d040) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86d040) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c9d701df2e0, 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(ffffffff832d56e9) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806b972368,ffff80002a787760) at vgonel+0x663 vrecycle(fffffd806b972368,ffff80002a787760) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a86cd70) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806b972368,ffff80002a787760) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806b972368) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd806b9725f0,fffffd806b972368,ffff80002a86ced8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a787760,ffffff9c,7c9d701dee30,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86d040) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86d040) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c9d701df2e0, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a86cbb0 rbx 0xfffffd806b972368 rdx 0 rcx 0 rax 0xffff80002a787760 r8 0x101010101010101 r9 0x8080808080808080 r10 0x8aee6914b4604235 r11 0xc9cc0bd76d64d5b1 r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff813126a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a86cba0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=141666 pid=43558 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=0xffff80002a7dfc98,0xffff80002a81fcb0 process=0xffff80002a7fd210 user=0xffff80002a868000, vmspace=0xfffffd8009427cf0 estcpu=17, cpticks=9, pctcpu=0.0, user=2, sys=7, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 9255 409910 81881 0 2 0 syz-executor 9255 411398 81881 0 2 0x4000000 syz-executor 26452 49274 13890 0 2 0 syz-executor 26452 307600 13890 0 3 0x4000080 fsleep syz-executor 7544 409945 50369 0 2 0 syz-executor 7544 133734 50369 0 3 0x4000080 fsleep syz-executor 3528 439822 12829 0 2 0 syz-executor 3528 332349 12829 0 2 0x4000000 syz-executor 73153 373717 93006 0 2 0 syz-executor 73153 229834 93006 0 3 0x4000080 fsleep syz-executor 73153 451196 93006 0 3 0x4000080 fsleep syz-executor 75060 451106 22525 0 3 0x80 nanoslp syz-executor 75060 469981 22525 0 3 0x4000080 kqpoll syz-executor 75060 476660 22525 0 3 0x4000080 fsleep syz-executor 41606 323198 73674 0 3 0x3000 suspend syz-executor 41606 325063 73674 0 2 0x4081000 syz-executor 81641 398020 0 0 3 0x14200 acct acct 18326 287993 0 0 3 0x14200 bored sosplice 93006 375943 42837 0 3 0x82 nanoslp syz-executor 81881 188893 42837 0 3 0x82 nanoslp syz-executor 22525 12736 42837 0 3 0x82 nanoslp syz-executor 73674 280737 42837 0 3 0x82 nanoslp syz-executor 50369 417280 42837 0 3 0x82 nanoslp syz-executor 13890 466167 42837 0 3 0x82 nanoslp syz-executor *43558 141666 42837 0 7 0x2 syz-executor 12829 56604 42837 0 2 0x3 syz-executor 42837 278762 12609 0 3 0x82 kqread syz-executor 12609 218953 33064 0 3 0x10008a sigsusp ksh 33064 498742 91653 0 3 0x98 kqread sshd-session 91653 267005 905 0 3 0x92 kqread sshd-session 71653 147805 1 0 3 0x100083 ttyin getty 905 213079 1 0 3 0x88 kqread sshd 28206 20416 93968 73 3 0x1100090 kqread syslogd 93968 460416 1 0 3 0x100082 sbwait syslogd 52494 261268 1 0 3 0x100080 kqread resolvd 518 91733 96610 77 3 0x100092 kqread dhcpleased 27948 387615 96610 77 3 0x100092 kqread dhcpleased 96610 162917 1 0 3 0x80 kqread dhcpleased 69232 78487 0 0 3 0x14200 bored smr 25119 321608 0 0 2 0x14200 zerothread 45408 362953 0 0 3 0x14200 aiodoned aiodoned 47675 354300 0 0 3 0x14200 syncer update 45905 263461 0 0 3 0x14200 cleaner cleaner 33298 499965 0 0 3 0x14200 reaper reaper 62594 217424 0 0 3 0x14200 pgdaemon pagedaemon 92875 256711 0 0 3 0x14200 bored viomb 32850 74304 0 0 3 0x40014200 acpi0 acpi0 67723 417538 0 0 3 0x14200 bored softnet7 67704 2664 0 0 3 0x14200 bored softnet6 16489 309699 0 0 3 0x14200 bored softnet5 16266 334201 0 0 3 0x14200 bored softnet4 14765 415534 0 0 3 0x14200 bored softnet3 13837 16881 0 0 3 0x14200 bored softnet2 67943 181347 0 0 3 0x14200 bored softnet1 87594 167263 0 0 3 0x14200 bored softnet0 28161 253471 0 0 3 0x14200 bored systqmp 45645 294299 0 0 3 0x14200 bored systq 24942 453117 0 0 3 0x40014200 tmoslp softclock 95111 84796 0 0 3 0x40014200 idle0 1 512661 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 10183 11043K 11301K 166960K 11630 0 pcb 17 14K 16K 166960K 164 0 rtable 199 6K 7K 166960K 300 0 pf 28 12K 17K 166960K 119 0 ifaddr 38 6K 7K 166960K 55 0 ifgroup 46 2K 2K 166960K 72 0 sysctl 3 1K 9K 166960K 9 0 counters 31 17K 18K 166960K 46 0 ioctlops 0 0K 4K 166960K 152 0 iov 0 0K 28K 166960K 32 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1341 84K 85K 166960K 1794 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 483 0 sigio 0 0K 0K 166960K 5 0 proc 60 59K 91K 166960K 511 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 171 0 in_multi 87 6K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 2 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 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 388 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 223 159K 168K 166960K 5921 0 UVM aobj 6 2K 2K 166960K 8 0 pinsyscall 38 76K 94K 166960K 1515 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 10 0K 2K 166960K 35 0 temp 75 8644K 8712K 166960K 9492 0 kqueue 13 20K 26K 166960K 96 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 120 130 0 127 3 2 1 3 0 8 0 rtentry 136 100 0 14 4 0 4 4 0 8 0 unpcb 144 335 0 320 4 3 1 4 0 8 0 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 366 0 361 13 4 9 13 0 8 8 arp 88 11 0 2 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 328 744 0 736 12 3 9 12 0 8 8 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 104 16 0 2 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 13 0 13 2 1 1 1 0 8 1 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 467 0 76 30 4 26 30 0 8 0 art_table 40 469 0 76 5 0 5 5 0 8 0 art_node 32 100 0 25 1 0 1 1 0 8 0 sysvmsgpl 40 32 0 0 1 0 1 1 0 8 0 semapl 112 7 0 1 1 0 1 1 0 8 0 shmpl 112 5 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2333 0 838 95 0 95 95 0 8 0 ffsino 256 2333 0 838 95 0 95 95 0 8 0 nchpl 144 3005 0 1327 63 0 63 63 0 8 0 rtmask 32 2 0 2 2 1 1 1 0 8 1 uvmvnodes 80 2615 0 0 54 0 54 54 0 8 0 vnodes 216 2615 0 0 146 0 146 146 0 8 0 namei 1024 9561 0 9561 2 1 1 1 0 8 1 kstatmem 264 38 0 18 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 11711 0 11711 8 7 1 8 1 8 1 plimitpl 152 85 0 69 1 0 1 1 0 8 0 sigapl 424 769 0 718 7 1 6 7 0 8 0 knotepl 120 18736 0 18689 31 20 11 17 0 8 8 kqueuepl 184 234 0 224 4 3 1 4 0 8 0 pipepl 304 123 0 96 3 0 3 3 0 8 0 fdescpl 448 746 0 717 5 1 4 5 0 8 0 filepl 120 4624 0 4418 12 1 11 12 0 8 4 lockfpl 104 154 0 152 1 0 1 1 0 8 0 lockfspl 48 63 0 61 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 67 0 51 1 0 1 1 0 8 0 ucredpl 104 835 0 824 1 0 1 1 0 8 0 zombiepl 144 755 0 754 1 0 1 1 0 8 0 processpl 1152 769 0 718 5 1 4 5 0 8 0 procpl 664 1339 0 1279 6 0 6 6 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 552 1265 0 1239 14 3 11 12 0 8 8 mcl64k 65536 20 0 20 2 1 1 1 0 8 1 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl12k 12288 1 0 1 1 1 0 1 0 8 0 mcl9k 9216 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 4 0 4 1 1 0 1 0 8 0 mcl4k 4096 2914 0 2861 15 7 8 14 0 8 0 mcl2k 2048 736 0 731 3 1 2 2 0 8 1 mtagpl 96 6 0 5 1 0 1 1 0 8 0 mbufpl 256 8155 0 7993 21 8 13 21 0 8 1 bufpl 280 5748 0 121 402 0 402 402 0 8 0 anonpl 24 143525 0 140412 62 30 32 57 0 187 3 amapchunkpl 152 19319 0 18846 36 11 25 31 0 158 5 amappl16 200 2540 0 2509 15 12 3 14 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 109 0 99 1 0 1 1 0 8 0 amappl13 176 21 0 20 1 0 1 1 0 8 0 amappl12 168 1350 0 1321 2 0 2 2 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 261 0 261 1 1 0 1 0 8 0 amappl8 136 20 0 19 1 0 1 1 0 8 0 amappl7 128 122 0 111 1 0 1 1 0 8 0 amappl6 120 178 0 174 1 0 1 1 0 8 0 amappl5 112 127 0 120 1 0 1 1 0 8 0 amappl4 104 280 0 265 1 0 1 1 0 8 0 amappl3 96 3541 0 3432 4 1 3 4 0 8 0 amappl2 88 623 0 568 2 0 2 2 0 8 0 amappl1 80 9854 0 9306 15 1 14 14 0 8 1 amappl 88 5202 0 5044 5 0 5 5 0 92 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 7 0 2 1 0 1 1 0 8 0 uaddrrnd 24 746 0 717 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 746 0 717 1 0 1 1 0 8 0 vmmpekpl 168 7383 0 7357 2 0 2 2 0 8 0 vmmpepl 168 53367 0 51530 95 6 89 91 0 357 5 vmsppl 368 745 0 717 4 1 3 4 0 8 0 rwobjpl 40 19212 0 15748 36 0 36 36 0 8 0 pdppl 4096 1499 0 1434 101 34 67 81 0 8 2 pvpl 32 353160 0 344444 153 59 94 143 0 265 9 pmappl 216 745 0 717 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 398 0 67 11 0 11 11 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(ffffffff832d56e9) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806b972368,ffff80002a787760) at vgonel+0x663 vrecycle(fffffd806b972368,ffff80002a787760) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a86cd70) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806b972368,ffff80002a787760) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806b972368) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd806b9725f0,fffffd806b972368,ffff80002a86ced8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a787760,ffffff9c,7c9d701dee30,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86d040) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86d040) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c9d701df2e0, 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(ffffffff832d56e9) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806b972368,ffff80002a787760) at vgonel+0x663 vrecycle(fffffd806b972368,ffff80002a787760) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a86cd70) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806b972368,ffff80002a787760) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806b972368) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd806b9725f0,fffffd806b972368,ffff80002a86ced8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a787760,ffffff9c,7c9d701dee30,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86d040) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86d040) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c9d701df2e0, count: -11