panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *321877 17582 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832f11d7) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806d18bb18,ffff80002a7cf768) at vgonel+0x663 vrecycle(fffffd806d18bb18,ffff80002a7cf768) at vrecycle+0x7c sys/kern/vfs_subr.c:1137 ufs_inactive(ffff80002a8415b0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806d18bb18,ffff80002a7cf768) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806d18bb18) at vput+0xdc sys/kern/vfs_subr.c:790 VOP_REMOVE(fffffd8065ed3600,fffffd806d18bb18,ffff80002a841718) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7cf768,ffffff9c,7531d4feb790,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a841880) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a841880) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7531d4febc40, 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(ffffffff832f11d7) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806d18bb18,ffff80002a7cf768) at vgonel+0x663 vrecycle(fffffd806d18bb18,ffff80002a7cf768) at vrecycle+0x7c sys/kern/vfs_subr.c:1137 ufs_inactive(ffff80002a8415b0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806d18bb18,ffff80002a7cf768) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806d18bb18) at vput+0xdc sys/kern/vfs_subr.c:790 VOP_REMOVE(fffffd8065ed3600,fffffd806d18bb18,ffff80002a841718) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7cf768,ffffff9c,7531d4feb790,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a841880) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a841880) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7531d4febc40, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a8413f0 rbx 0xfffffd806d18bb18 rdx 0 rcx 0 rax 0xffff80002a7cf768 r8 0x101010101010101 r9 0x8080808080808080 r10 0x990c76ca8c5c1c50 r11 0xf55c52f2be955e2b r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff81b8aa75 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a8413e0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=321877 pid=17582 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=77, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7ce010,0xffff80002a7cfca8 process=0xffff80002a7e8490 user=0xffff80002a83c000, vmspace=0xfffffd8009427cf0 estcpu=36, cpticks=9, pctcpu=0.0, user=0, sys=9, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 31752 132638 22189 0 2 0 syz-executor 31752 285800 22189 0 3 0x4000080 fsleep syz-executor 31752 519078 22189 0 2 0x4000000 syz-executor 51212 186719 36477 60929 2 0x10 syz-executor 51212 153460 36477 60929 2 0x4000010 syz-executor 51212 365337 36477 60929 3 0x4000090 fsleep syz-executor 51212 478968 36477 60929 3 0x4000090 fsleep syz-executor 73959 508153 42613 0 2 0 syz-executor 73959 306552 42613 0 2 0x4000000 syz-executor 73959 76169 42613 0 3 0x4000080 fsleep syz-executor 73959 286568 42613 0 2 0x4000000 syz-executor 60764 515116 32166 0 3 0x80 nanoslp syz-executor 60764 430421 32166 0 3 0x4000080 fsleep syz-executor 60764 208001 32166 0 3 0x4000080 fsleep syz-executor 60764 236521 32166 0 3 0x4000080 fsleep syz-executor 50181 330813 41262 0 2 0 syz-executor 50181 319870 41262 0 3 0x4000080 fsleep syz-executor 43688 45793 0 0 3 0x14280 nfsidl nfsio 80551 334654 0 0 3 0x14280 nfsidl nfsio 60430 478024 0 0 3 0x14280 nfsidl nfsio 89420 400201 0 0 3 0x14280 nfsidl nfsio 49760 335985 0 0 3 0x14280 nfsidl nfsio 62053 468217 0 0 3 0x14280 nfsidl nfsio 7495 190637 0 0 3 0x14280 nfsidl nfsio 48010 517561 0 0 3 0x14280 nfsidl nfsio 75619 458486 0 0 3 0x14280 nfsidl nfsio 60448 192543 0 0 3 0x14280 nfsidl nfsio 67225 466398 0 0 3 0x14280 nfsidl nfsio 75624 467550 0 0 3 0x14280 nfsidl nfsio 943 471911 0 0 3 0x14280 nfsidl nfsio 70525 128688 0 0 3 0x14280 nfsidl nfsio 35235 234348 0 0 3 0x14280 nfsidl nfsio 96012 183614 0 0 3 0x14280 nfsidl nfsio 49872 193820 0 0 3 0x14280 nfsidl nfsio 94993 282116 0 0 3 0x14280 nfsidl nfsio 81704 501328 0 0 3 0x14280 nfsidl nfsio 34535 334618 0 0 3 0x14280 nfsidl nfsio 79580 342416 0 0 3 0x14200 acct acct 43710 254520 48228 0 3 0x82 wait syz-executor 41262 341673 48228 0 3 0x82 nanoslp syz-executor 12802 191930 48228 0 3 0x82 nanoslp syz-executor 36477 105845 48228 0 3 0x82 nanoslp syz-executor 32166 213923 48228 0 3 0x82 nanoslp syz-executor 22189 50996 48228 0 3 0x82 nanoslp syz-executor *17582 321877 48228 0 7 0x2 syz-executor 42613 245051 48228 0 3 0x82 nanoslp syz-executor 48228 190725 77431 0 3 0x82 kqread syz-executor 77431 259867 21286 0 3 0x10008a sigsusp ksh 21286 212060 29698 0 3 0x98 kqread sshd-session 29698 30798 37429 0 3 0x92 kqread sshd-session 9441 191844 1 0 3 0x100083 ttyopn getty 37429 432934 1 0 3 0x88 kqread sshd 20367 8386 12270 73 3 0x1100090 kqread syslogd 12270 279777 1 0 3 0x100082 sbwait syslogd 58483 415694 1 0 3 0x100080 kqread resolvd 44334 63258 98891 77 3 0x100092 kqread dhcpleased 87695 319357 98891 77 3 0x100092 kqread dhcpleased 98891 164499 1 0 3 0x80 kqread dhcpleased 84791 345644 0 0 3 0x14200 bored smr 39649 9859 0 0 2 0x14200 zerothread 19237 76205 0 0 3 0x14200 aiodoned aiodoned 7456 430198 0 0 3 0x14200 syncer update 50208 245149 0 0 3 0x14200 cleaner cleaner 97880 157230 0 0 3 0x14200 reaper reaper 12023 251782 0 0 3 0x14200 pgdaemon pagedaemon 2229 22322 0 0 3 0x14200 bored viomb 5406 405654 0 0 3 0x40014200 acpi0 acpi0 72303 143977 0 0 3 0x14200 bored softnet0 13300 49665 0 0 3 0x14200 bored systqmp 76648 30128 0 0 3 0x14200 bored systq 82870 126225 0 0 3 0x40014200 tmoslp softclock 53374 21875 0 0 3 0x40014200 idle0 1 264903 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 10177 11049K 11383K 166960K 11650 0 pcb 17 14K 15K 166960K 73 0 rtable 238 8K 8K 166960K 410 0 pf 33 13K 14K 166960K 59 0 ifaddr 44 7K 8K 166960K 58 0 ifgroup 52 2K 2K 166960K 82 0 sysctl 1 1K 9K 166960K 7 0 counters 33 17K 18K 166960K 43 0 ioctlops 0 0K 4K 166960K 171 0 iov 0 0K 16K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1341 84K 85K 166960K 1551 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 377 0 sigio 0 0K 0K 166960K 7 0 proc 63 67K 100K 166960K 501 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 32 0 in_multi 99 7K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 377 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 237 143K 157K 166960K 5128 0 UVM aobj 11 2K 2K 166960K 13 0 pinsyscall 38 76K 94K 166960K 1455 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 17 0 NDP 12 0K 2K 166960K 36 0 temp 37 8642K 8706K 166960K 18883 0 kqueue 13 20K 29K 166960K 78 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 62 0 59 1 0 1 1 0 8 0 rtentry 136 121 0 18 4 0 4 4 0 8 0 unpcb 144 315 0 299 1 0 1 1 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 87 0 83 1 0 1 1 0 8 0 arp 96 20 0 1 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 35 0 33 1 0 1 1 0 8 0 inpcb 328 352 0 344 7 5 2 7 0 8 0 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 112 25 0 1 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1072 6 0 5 1 0 1 1 0 8 0 pppxif 1384 1 0 1 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfrule 1344 68 0 67 1 0 1 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 507 0 63 29 1 28 29 0 8 0 art_table 40 509 0 64 5 0 5 5 0 8 0 art_node 32 121 0 30 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 10 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2022 0 522 95 0 95 95 0 8 0 ffsino 256 2022 0 522 95 0 95 95 0 8 0 nchpl 144 2555 0 861 64 0 64 64 0 8 0 vnodes 216 2193 0 0 122 0 122 122 0 8 0 namei 1024 7897 0 7895 3 2 1 2 0 8 0 kstatmem 264 40 0 16 2 0 2 2 0 8 0 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 8152 0 8152 9 1 8 8 1 8 8 plimitpl 152 51 0 35 1 0 1 1 0 8 0 sigapl 424 687 0 624 9 1 8 8 0 8 0 knotepl 120 12015 0 11968 21 12 9 15 0 8 6 kqueuepl 184 163 0 154 4 3 1 4 0 8 0 pipepl 304 149 0 122 3 0 3 3 0 8 0 fdescpl 448 653 0 624 5 1 4 5 0 8 0 filepl 120 3348 0 3135 12 4 8 12 0 8 0 lockfpl 104 237 0 234 2 1 1 2 0 8 0 lockfspl 48 50 0 47 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 41 0 25 1 0 1 1 0 8 0 ucredpl 104 312 0 300 1 0 1 1 0 8 0 zombiepl 144 678 0 676 1 0 1 1 0 8 0 processpl 1152 687 0 624 5 0 5 5 0 8 0 procpl 664 1101 0 1024 7 0 7 7 0 8 0 sosppl 176 7 0 7 2 1 1 1 0 8 1 sockpl 552 744 0 716 8 4 4 7 0 8 1 mcl64k 65536 10 0 10 2 1 1 1 0 8 1 mcl8k 8192 13 0 13 2 1 1 1 0 8 1 mcl4k 4096 2802 0 2752 16 8 8 15 0 8 1 mcl2k 2048 584 0 582 3 1 2 2 0 8 1 mtagpl 96 5 0 5 2 1 1 1 0 8 1 mbufpl 256 6931 0 6748 19 5 14 18 0 8 1 bufpl 280 2734 0 119 187 0 187 187 0 8 0 anonpl 24 124770 0 121663 54 10 44 44 0 187 20 amapchunkpl 152 15914 0 15411 33 7 26 31 0 158 6 amappl16 200 2348 0 2320 18 7 11 15 0 8 8 amappl15 192 70 0 69 1 0 1 1 0 8 0 amappl14 184 13 0 13 1 1 0 1 0 8 0 amappl13 176 409 0 408 1 0 1 1 0 8 0 amappl12 168 993 0 955 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 44 0 34 1 0 1 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 26 0 25 1 0 1 1 0 8 0 amappl7 128 80 0 78 1 0 1 1 0 8 0 amappl6 120 275 0 263 1 0 1 1 0 8 0 amappl5 112 73 0 66 1 0 1 1 0 8 0 amappl4 104 382 0 358 1 0 1 1 0 8 0 amappl3 96 2647 0 2553 3 0 3 3 0 8 0 amappl2 88 761 0 692 2 0 2 2 0 8 0 amappl1 80 9767 0 9230 13 1 12 13 0 8 0 amappl 88 4385 0 4215 5 0 5 5 0 92 1 uvmvnodes 80 2193 0 0 45 0 45 45 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 128 254 0 254 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 12 0 2 1 0 1 1 0 8 0 uaddrrnd 24 653 0 624 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 653 0 624 1 0 1 1 0 8 0 vmmpekpl 168 6820 0 6792 2 0 2 2 0 8 0 vmmpepl 168 48458 0 46669 90 1 89 89 0 357 9 vmsppl 368 652 0 624 4 1 3 4 0 8 0 rwobjpl 40 18167 0 15118 33 0 33 33 0 8 1 pdppl 4096 1312 0 1248 96 30 66 80 0 8 2 pvpl 32 302148 0 293878 124 15 109 109 0 265 30 pmappl 216 652 0 624 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 380 0 55 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(ffffffff832f11d7) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806d18bb18,ffff80002a7cf768) at vgonel+0x663 vrecycle(fffffd806d18bb18,ffff80002a7cf768) at vrecycle+0x7c sys/kern/vfs_subr.c:1137 ufs_inactive(ffff80002a8415b0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806d18bb18,ffff80002a7cf768) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806d18bb18) at vput+0xdc sys/kern/vfs_subr.c:790 VOP_REMOVE(fffffd8065ed3600,fffffd806d18bb18,ffff80002a841718) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7cf768,ffffff9c,7531d4feb790,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a841880) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a841880) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7531d4febc40, 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(ffffffff832f11d7) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806d18bb18,ffff80002a7cf768) at vgonel+0x663 vrecycle(fffffd806d18bb18,ffff80002a7cf768) at vrecycle+0x7c sys/kern/vfs_subr.c:1137 ufs_inactive(ffff80002a8415b0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806d18bb18,ffff80002a7cf768) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806d18bb18) at vput+0xdc sys/kern/vfs_subr.c:790 VOP_REMOVE(fffffd8065ed3600,fffffd806d18bb18,ffff80002a841718) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7cf768,ffffff9c,7531d4feb790,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a841880) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a841880) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7531d4febc40, count: -11