panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *388670 82279 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8330dc30) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805f2a5018,ffff80002a7a7c98) at vgonel+0x663 vrecycle(fffffd805f2a5018,ffff80002a7a7c98) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80003c91d330) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805f2a5018,ffff80002a7a7c98) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd805f2a5018) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd805f2a5888,fffffd805f2a5018,ffff80003c91d498) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7a7c98,ffffff9c,7e66c1484b10,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80003c91d600) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c91d600) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e66c1484fc0, 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(ffffffff8330dc30) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805f2a5018,ffff80002a7a7c98) at vgonel+0x663 vrecycle(fffffd805f2a5018,ffff80002a7a7c98) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80003c91d330) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805f2a5018,ffff80002a7a7c98) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd805f2a5018) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd805f2a5888,fffffd805f2a5018,ffff80003c91d498) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7a7c98,ffffff9c,7e66c1484b10,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80003c91d600) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c91d600) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e66c1484fc0, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c91d170 rbx 0xfffffd805f2a5018 rdx 0 rcx 0 rax 0xffff80002a7a7c98 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc66c169eadbee87e r11 0xc2646f2f97ed85ec r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff8328a315 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c91d160 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=388670 pid=82279 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=0xffff80003c9222b8,0xffff80002f0f1a18 process=0xffff8000ffff8d98 user=0xffff80003c918000, vmspace=0xfffffd806c996a20 estcpu=36, cpticks=35, pctcpu=0.0, user=2, sys=31, intr=2 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 26007 186791 80953 0 2 0 syz-executor 26007 395126 80953 0 3 0x4000080 fsleep syz-executor 45254 44680 71852 0 2 0 syz-executor 45254 432526 71852 0 3 0x4000080 fsleep syz-executor 80302 232466 61439 0 2 0 syz-executor 80302 310785 61439 0 3 0x4000080 piperd syz-executor 80302 81447 61439 0 3 0x4000080 fsleep syz-executor 141 13218 97985 0 2 0 syz-executor 141 123797 97985 0 3 0x4000080 fsleep syz-executor 141 354430 97985 0 3 0x4000080 fsleep syz-executor 77326 344742 9829 0 2 0 syz-executor 77326 86080 9829 0 3 0x4000080 fsleep syz-executor 77326 488960 9829 0 3 0x4000080 fsleep syz-executor 64680 267037 57643 0 2 0 syz-executor 64680 191490 57643 0 3 0x4000080 ttyin syz-executor 64680 483219 57643 0 3 0x4000080 fsleep syz-executor 20053 241109 0 0 3 0x14200 acct acct 71852 504483 65778 0 3 0x82 nanoslp syz-executor 73395 361188 1 0 3 0x100083 ttyin getty 9505 350075 0 0 3 0x14280 nfsidl nfsio 58123 317614 0 0 3 0x14280 nfsidl nfsio 30102 297951 0 0 3 0x14280 nfsidl nfsio 33428 459198 0 0 3 0x14280 nfsidl nfsio 15713 488533 0 0 3 0x14280 nfsidl nfsio 70267 250327 0 0 3 0x14280 nfsidl nfsio 22506 433711 0 0 3 0x14280 nfsidl nfsio 44616 514841 0 0 3 0x14280 nfsidl nfsio 19306 257735 0 0 3 0x14280 nfsidl nfsio 47610 211267 0 0 3 0x14280 nfsidl nfsio 94921 429232 0 0 3 0x14280 nfsidl nfsio 74272 268796 0 0 3 0x14280 nfsidl nfsio 71016 284026 0 0 3 0x14280 nfsidl nfsio 32249 481089 0 0 3 0x14280 nfsidl nfsio 36017 79599 0 0 3 0x14280 nfsidl nfsio 92198 53981 0 0 3 0x14280 nfsidl nfsio 20802 128139 0 0 3 0x14280 nfsidl nfsio 66753 301520 0 0 3 0x14280 nfsidl nfsio 21058 28446 0 0 3 0x14280 nfsidl nfsio 78231 126718 0 0 3 0x14280 nfsidl nfsio *82279 388670 65778 0 7 0x2 syz-executor 80953 46442 65778 0 3 0x82 nanoslp syz-executor 61439 281295 65778 0 3 0x82 nanoslp syz-executor 57643 395378 65778 0 3 0x82 nanoslp syz-executor 9829 419403 65778 0 3 0x82 nanoslp syz-executor 97985 150532 65778 0 3 0x82 nanoslp syz-executor 97890 483617 65778 0 3 0x82 nanoslp syz-executor 65778 513911 99377 0 3 0x82 kqread syz-executor 99377 384139 87900 0 3 0x10008a sigsusp ksh 87900 230090 36050 0 3 0x98 kqread sshd-session 36050 498035 98108 0 3 0x92 kqread sshd-session 98108 135862 1 0 3 0x88 kqread sshd 67136 295343 37323 73 3 0x1100090 kqread syslogd 37323 381783 1 0 3 0x100082 sbwait syslogd 94904 183515 1 0 3 0x100080 kqread resolvd 12324 171514 7787 77 3 0x100092 kqread dhcpleased 70697 192125 7787 77 3 0x100092 kqread dhcpleased 7787 394760 1 0 3 0x80 kqread dhcpleased 49066 226661 0 0 3 0x14200 bored smr 61015 364214 0 0 2 0x14200 zerothread 47051 21718 0 0 3 0x14200 aiodoned aiodoned 23449 51963 0 0 3 0x14200 syncer update 6843 290182 0 0 3 0x14200 cleaner cleaner 79233 70023 0 0 2 0x14200 reaper 21443 489111 0 0 3 0x14200 pgdaemon pagedaemon 9834 109893 0 0 3 0x14200 bored viomb 59496 132447 0 0 3 0x40014200 acpi0 acpi0 29164 42278 0 0 3 0x14200 bored softnet0 47624 273473 0 0 3 0x14200 bored systqmp 64801 30853 0 0 3 0x14200 bored systq 17720 156022 0 0 3 0x40014200 tmoslp softclock 6639 441744 0 0 3 0x40014200 idle0 1 510826 0 0 3 0x80082 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 11073 12255K 16361K 166960K 15693 0 pcb 17 16K 18K 166960K 739 0 rtable 236 13K 14K 166960K 828 0 pf 32 13K 16K 166960K 202 0 ifaddr 37 7K 9K 166960K 153 0 ifgroup 53 2K 2K 166960K 259 0 sysctl 4 1K 9K 166960K 27 0 counters 33 17K 18K 166960K 208 0 ioctlops 0 0K 4K 166960K 607 0 iov 1 12K 24K 166960K 181 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1424 90K 91K 166960K 3513 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 6K 166960K 26 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 90 0 dirhash 12 2K 3K 166960K 60 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 106K 166960K 2032 0 sigio 0 0K 0K 166960K 99 0 proc 60 59K 83K 166960K 804 0 subproc 72 4K 4K 166960K 109 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 461 0 in_multi 86 6K 7K 166960K 243 0 ether_multi 1 0K 0K 166960K 25 0 mrt 1 0K 0K 166960K 20 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 756 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 222 150K 169K 166960K 20257 0 UVM aobj 60 20K 22K 166960K 70 0 pinsyscall 37 74K 90K 166960K 3248 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 79 0 NDP 11 0K 2K 166960K 103 0 temp 86 8672K 8768K 166960K 48961 0 kqueue 13 20K 30K 166960K 384 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 120 335 0 332 4 3 1 4 0 8 0 rtentry 136 222 0 137 4 0 4 4 0 8 0 unpcb 144 1366 0 1349 10 9 1 9 0 8 0 syncache 336 11 0 11 2 2 0 1 0 8 0 tcpqe 32 11 0 11 2 2 0 1 0 8 0 tcpcb 736 745 0 739 16 15 1 7 0 8 0 arp 96 34 0 18 1 0 1 1 0 8 0 ipq 40 11 0 11 1 1 0 1 0 8 0 ipqe 40 13 0 13 1 1 0 1 0 8 0 inpcb 328 2476 0 2466 18 16 2 8 0 8 0 ip6q 72 6 0 6 1 0 1 1 0 8 1 ip6af 40 9 0 9 1 0 1 1 0 8 1 nd6 112 48 0 25 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 2 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1072 150 0 150 4 3 1 1 0 8 1 pppxif 1384 44 0 44 2 2 0 1 0 8 0 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 950 0 583 31 4 27 31 0 8 0 art_table 40 954 0 583 5 0 5 5 0 8 0 art_node 32 217 0 140 1 0 1 1 0 8 0 sysvmsgpl 40 110 0 106 2 1 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 84 0 74 1 0 1 1 0 8 0 shmpl 112 53 0 4 2 0 2 2 0 8 0 dirhash 1024 49 0 32 3 0 3 3 0 8 0 dino2pl 256 5357 0 3861 95 0 95 95 0 8 0 ffsino 256 5357 0 3861 95 0 95 95 0 8 0 nchpl 144 8027 0 6325 64 0 64 64 0 8 0 rtmask 32 19 0 19 2 2 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 29553 0 29553 10 6 4 4 0 8 4 vcpupl 3904 8 0 0 1 0 1 1 0 8 0 vmpool 808 14 0 6 1 0 1 1 0 8 0 kstatmem 264 158 0 136 3 1 2 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 9 0 9 4 3 1 1 0 8 1 scxspl 216 27749 0 27749 17 16 1 8 1 8 1 plimitpl 152 859 0 842 1 0 1 1 0 8 0 sigapl 424 2369 0 2306 10 2 8 8 0 8 0 knotepl 120 106247 0 106200 69 59 10 23 0 8 6 kqueuepl 184 821 0 811 4 3 1 4 0 8 0 pipepl 304 564 0 536 19 16 3 12 0 8 0 fdescpl 448 2301 0 2273 4 0 4 4 0 8 0 filepl 120 16785 0 16566 20 10 10 16 0 8 1 lockfpl 104 798 0 796 2 1 1 2 0 8 0 lockfspl 48 255 0 253 1 0 1 1 0 8 0 sessionpl 144 36 0 28 1 0 1 1 0 8 0 pgrppl 48 82 0 66 1 0 1 1 0 8 0 ucredpl 104 2928 0 2917 1 0 1 1 0 8 0 zombiepl 144 2889 0 2888 3 2 1 1 0 8 0 processpl 1152 2369 0 2306 6 1 5 5 0 8 0 procpl 664 5469 0 5396 10 2 8 8 0 8 1 sosppl 176 16 0 16 3 3 0 1 0 8 0 sockpl 552 4279 0 4249 25 21 4 18 0 8 1 mcl64k 65536 180 0 180 3 3 0 1 0 8 0 mcl16k 16384 17 0 17 3 3 0 1 0 8 0 mcl12k 12288 5 0 5 2 2 0 1 0 8 0 mcl9k 9216 6 0 6 2 2 0 1 0 8 0 mcl8k 8192 81 0 81 4 3 1 1 0 8 1 mcl4k 4096 5117 0 5065 18 10 8 16 0 8 1 mcl2k2 2112 4 0 4 3 2 1 1 0 8 1 mcl2k 2048 3176 0 3173 9 7 2 9 0 8 0 mtagpl 96 106 0 28 2 0 2 2 0 8 0 mbufpl 256 32868 0 32626 371 350 21 370 0 8 0 bufpl 280 9848 0 3627 445 0 445 445 0 8 0 anonpl 24 338146 0 335041 76 44 32 59 0 187 0 amapchunkpl 152 70248 0 69793 54 29 25 35 0 158 2 amappl16 200 6037 0 6001 39 35 4 16 0 8 0 amappl15 192 3 0 2 1 0 1 1 0 8 0 amappl14 184 3 0 3 2 2 0 1 0 8 0 amappl13 176 456 0 455 1 0 1 1 0 8 0 amappl12 168 2690 0 2653 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 48 0 37 1 0 1 1 0 8 0 amappl9 144 284 0 284 1 1 0 1 0 8 0 amappl8 136 21 0 20 1 0 1 1 0 8 0 amappl7 128 119 0 117 1 0 1 1 0 8 0 amappl6 120 319 0 308 1 0 1 1 0 8 0 amappl5 112 77 0 69 1 0 1 1 0 8 0 amappl4 104 443 0 419 1 0 1 1 0 8 0 amappl3 96 14026 0 13926 4 0 4 4 0 8 0 amappl2 88 638 0 584 2 0 2 2 0 8 0 amappl1 80 18837 0 18300 13 1 12 13 0 8 0 amappl 88 19081 0 18926 5 0 5 5 0 92 0 uvmvnodes 80 146 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 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 8 0 8 2 2 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 69 0 10 2 0 2 2 0 8 0 uaddrrnd 24 2301 0 2273 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2301 0 2273 1 0 1 1 0 8 0 vmmpekpl 168 20314 0 20256 5 1 4 4 0 8 0 vmmpepl 168 150853 0 149106 104 20 84 98 0 357 0 vmsppl 368 2300 0 2272 4 1 3 4 0 8 0 rwobjpl 40 39360 0 38313 15 1 14 14 0 8 0 pdppl 4096 4636 0 4564 127 53 74 76 0 8 2 pvpl 32 1009345 0 1000836 170 72 98 146 0 265 5 pmappl 216 2314 0 2278 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 810 0 466 20 5 15 20 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(ffffffff8330dc30) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805f2a5018,ffff80002a7a7c98) at vgonel+0x663 vrecycle(fffffd805f2a5018,ffff80002a7a7c98) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80003c91d330) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805f2a5018,ffff80002a7a7c98) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd805f2a5018) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd805f2a5888,fffffd805f2a5018,ffff80003c91d498) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7a7c98,ffffff9c,7e66c1484b10,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80003c91d600) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c91d600) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e66c1484fc0, 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(ffffffff8330dc30) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805f2a5018,ffff80002a7a7c98) at vgonel+0x663 vrecycle(fffffd805f2a5018,ffff80002a7a7c98) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80003c91d330) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805f2a5018,ffff80002a7a7c98) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd805f2a5018) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd805f2a5888,fffffd805f2a5018,ffff80003c91d498) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7a7c98,ffffff9c,7e66c1484b10,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80003c91d600) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c91d600) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e66c1484fc0, count: -11