panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *177502 26276 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8331355c) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806966f878,ffff80002ccea558) at vgonel+0x663 vrecycle(fffffd806966f878,ffff80002ccea558) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80003c931560) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806966f878,ffff80002ccea558) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806966f878) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806db23bd0,fffffd806966f878,ffff80003c9316c8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002ccea558,ffffff9c,7e7d14a76960,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80003c931830) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c931830) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7d14a76e10, 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(ffffffff8331355c) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806966f878,ffff80002ccea558) at vgonel+0x663 vrecycle(fffffd806966f878,ffff80002ccea558) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80003c931560) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806966f878,ffff80002ccea558) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806966f878) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806db23bd0,fffffd806966f878,ffff80003c9316c8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002ccea558,ffffff9c,7e7d14a76960,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80003c931830) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c931830) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7d14a76e10, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c9313a0 rbx 0xfffffd806966f878 rdx 0 rcx 0 rax 0xffff80002ccea558 r8 0x101010101010101 r9 0x8080808080808080 r10 0x547fbc8cb98fc7a8 r11 0x2f2226b4a0b55116 r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff82b48a15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c931390 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=177502 pid=26276 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=0xffff80002ccea2c0,0xffff80002ccead30 process=0xffff8000318fd218 user=0xffff80003c92c000, vmspace=0xfffffd806cdc5740 estcpu=36, cpticks=14, pctcpu=0.0, user=3, sys=11, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 2224 214501 32436 0 2 0 syz-executor 2224 169577 32436 0 2 0x4000000 syz-executor 20419 171712 12760 0 2 0 syz-executor 20419 104314 12760 0 3 0x4000080 fsleep syz-executor 57849 253450 37350 0 2 0 syz-executor 57849 395104 37350 0 3 0x4000080 fsleep syz-executor 52168 477246 77950 0 2 0 syz-executor 52168 162953 77950 0 3 0x4000080 kqsel syz-executor 32159 357635 52833 60928 2 0x10 syz-executor 32159 3871 52833 60928 3 0x4000090 lockf syz-executor 32159 289784 52833 60928 3 0x4000090 lockf syz-executor 32159 154621 52833 60928 3 0x4000090 fsleep syz-executor 66978 523109 1 0 3 0x100083 ttyin getty 29359 176193 0 0 3 0x14280 nfsidl nfsio 30320 6184 0 0 3 0x14280 nfsidl nfsio 10999 325258 0 0 3 0x14280 nfsidl nfsio 54761 238844 0 0 3 0x14280 nfsidl nfsio 13783 473135 0 0 3 0x14280 nfsidl nfsio 66751 441814 0 0 3 0x14280 nfsidl nfsio 82038 157898 0 0 3 0x14280 nfsidl nfsio 3246 307073 0 0 3 0x14280 nfsidl nfsio 678 130882 0 0 3 0x14280 nfsidl nfsio 41472 456125 0 0 3 0x14280 nfsidl nfsio 37596 314349 0 0 3 0x14280 nfsidl nfsio 40222 144207 0 0 3 0x14280 nfsidl nfsio 20138 209620 0 0 3 0x14280 nfsidl nfsio 47035 148939 0 0 3 0x14280 nfsidl nfsio 32750 365138 0 0 3 0x14280 nfsidl nfsio 74612 99385 0 0 3 0x14280 nfsidl nfsio *26276 177502 76763 0 7 0x2 syz-executor 26093 239505 0 0 3 0x14200 acct acct 42699 521762 0 0 3 0x14280 nfsidl nfsio 2531 98128 0 0 3 0x14280 nfsidl nfsio 74527 170848 0 0 3 0x14280 nfsidl nfsio 52247 234030 0 0 3 0x14280 nfsidl nfsio 12760 334441 76763 0 3 0x82 nanoslp syz-executor 14491 214176 76763 0 2 0x2 syz-executor 77950 57093 76763 0 3 0x82 nanoslp syz-executor 52833 961 76763 0 3 0x82 nanoslp syz-executor 37350 26565 76763 0 3 0x82 nanoslp syz-executor 32436 224049 76763 0 3 0x82 nanoslp syz-executor 12536 140687 76763 0 3 0x82 nanoslp syz-executor 76763 204149 81769 0 2 0x2 syz-executor 81769 439514 95928 0 3 0x10008a sigsusp ksh 95928 491198 44104 0 3 0x98 kqread sshd-session 44104 394156 99226 0 3 0x92 kqread sshd-session 99226 238736 1 0 3 0x88 kqread sshd 23451 52557 99136 73 3 0x1100090 kqread syslogd 99136 59587 1 0 3 0x100082 sbwait syslogd 126 140564 1 0 3 0x100080 kqread resolvd 84898 175610 85247 77 3 0x100092 kqread dhcpleased 63208 287784 85247 77 3 0x100092 kqread dhcpleased 85247 165648 1 0 3 0x80 kqread dhcpleased 67495 433387 0 0 3 0x14200 bored smr 43295 223246 0 0 2 0x14200 zerothread 6678 268909 0 0 3 0x14200 aiodoned aiodoned 33077 395008 0 0 3 0x14200 syncer update 61703 157704 0 0 3 0x14200 cleaner cleaner 5115 28802 0 0 3 0x14200 reaper reaper 99420 311824 0 0 3 0x14200 pgdaemon pagedaemon 73718 302831 0 0 3 0x14200 bored viomb 56388 149369 0 0 3 0x40014200 acpi0 acpi0 51677 445642 0 0 3 0x14200 bored softnet0 47225 513256 0 0 3 0x14200 bored systqmp 73326 285431 0 0 3 0x14200 bored systq 84511 482057 0 0 3 0x40014200 tmoslp softclock 28114 270093 0 0 3 0x40014200 idle0 1 149582 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 11052 12246K 12788K 166960K 14843 0 pcb 18 16K 18K 166960K 339 0 rtable 240 11K 11K 166960K 538 0 pf 27 12K 15K 166960K 97 0 ifaddr 36 6K 7K 166960K 84 0 ifgroup 43 1K 2K 166960K 121 0 sysctl 4 1K 9K 166960K 9 0 counters 32 17K 18K 166960K 110 0 ioctlops 0 0K 4K 166960K 295 0 iov 0 0K 14K 166960K 116 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1494 94K 94K 166960K 2513 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 66 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 236K 166960K 1131 0 sigio 0 0K 0K 166960K 24 0 proc 60 59K 100K 166960K 631 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 116 0 in_multi 84 6K 7K 166960K 151 0 ether_multi 1 0K 0K 166960K 10 0 mrt 2 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 121 546K 546K 166960K 121 0 exec 0 0K 1K 166960K 528 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 224 160K 178K 166960K 11620 0 UVM aobj 121 8K 10K 166960K 129 0 pinsyscall 37 74K 92K 166960K 2213 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 53 0 NDP 10 0K 2K 166960K 54 0 temp 83 8676K 8775K 166960K 46134 0 kqueue 13 20K 30K 166960K 217 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 120 201 0 198 3 2 1 3 0 8 0 rtentry 136 147 0 55 4 0 4 4 0 8 0 unpcb 144 810 0 792 5 4 1 5 0 8 0 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpcb 736 625 0 621 13 6 7 7 0 8 6 arp 96 20 0 6 1 0 1 1 0 8 0 ipq 40 8 0 3 1 0 1 1 0 8 0 ipqe 40 21 0 15 1 0 1 1 0 8 0 inpcb 328 1447 0 1439 12 5 7 7 0 8 5 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 33 0 7 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 69 0 69 1 0 1 1 0 8 1 pppxif 1384 4 0 4 2 1 1 1 0 8 1 pfrule 1360 1 0 1 1 1 0 1 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 656 0 256 31 4 27 31 0 8 1 art_table 40 659 0 256 5 0 5 5 0 8 0 art_node 32 147 0 64 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 60 0 50 1 0 1 1 0 8 0 shmpl 112 122 0 6 4 0 4 4 0 8 0 dirhash 1024 28 0 11 3 0 3 3 0 8 0 dino2pl 256 3431 0 1933 95 0 95 95 0 8 0 ffsino 256 3431 0 1933 95 0 95 95 0 8 0 nchpl 144 5001 0 3315 63 0 63 63 0 8 0 rtmask 32 15 0 15 1 0 1 1 0 8 1 vnodes 216 4251 0 0 237 0 237 237 0 8 0 namei 1024 17744 0 17744 2 1 1 2 0 8 1 vcpupl 3904 2 0 0 1 0 1 1 0 8 0 vmpool 808 4 0 2 1 0 1 1 0 8 0 kstatmem 264 70 0 50 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 20790 0 20790 8 7 1 8 1 8 1 plimitpl 152 334 0 317 1 0 1 1 0 8 0 sigapl 424 1415 0 1353 8 0 8 8 0 8 0 knotepl 120 168732 0 168685 31 21 10 17 0 8 8 kqueuepl 184 358 0 348 3 1 2 3 0 8 1 pipepl 304 262 0 235 8 5 3 8 0 8 0 fdescpl 448 1380 0 1352 5 1 4 5 0 8 0 filepl 120 9491 0 9267 12 3 9 12 0 8 1 lockfpl 104 380 0 372 2 1 1 2 0 8 0 lockfspl 48 170 0 164 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 81 0 65 1 0 1 1 0 8 0 ucredpl 104 1166 0 1154 1 0 1 1 0 8 0 zombiepl 144 1388 0 1386 1 0 1 1 0 8 0 processpl 1152 1415 0 1353 5 0 5 5 0 8 0 procpl 664 2891 0 2820 7 0 7 7 0 8 0 sosppl 176 7 0 7 1 1 0 1 0 8 0 sockpl 552 2497 0 2467 18 10 8 15 0 8 5 mcl64k 65536 184 0 182 1 0 1 1 0 8 0 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 121 0 121 2 1 1 1 0 8 1 mcl4k 4096 3762 0 3706 13 5 8 13 0 8 0 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 1309 0 1306 6 5 1 6 0 8 0 mtagpl 96 136 0 14 3 0 3 3 0 8 0 mbufpl 256 23423 0 23156 192 171 21 91 0 8 0 bufpl 280 7220 0 999 445 0 445 445 0 8 0 anonpl 24 242808 0 236888 60 12 48 52 0 187 0 amapchunkpl 152 39543 0 39030 34 8 26 33 0 158 0 amappl16 200 4420 0 4287 32 22 10 18 0 8 0 amappl15 192 47 0 47 1 1 0 1 0 8 0 amappl14 184 9 0 9 1 1 0 1 0 8 0 amappl13 176 420 0 418 1 0 1 1 0 8 0 amappl12 168 1739 0 1702 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 44 0 34 1 0 1 1 0 8 0 amappl9 144 246 0 244 1 0 1 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 142 0 139 1 0 1 1 0 8 0 amappl6 120 276 0 265 1 0 1 1 0 8 0 amappl5 112 74 0 66 1 0 1 1 0 8 0 amappl4 104 396 0 372 1 0 1 1 0 8 0 amappl3 96 6736 0 6658 3 0 3 3 0 8 0 amappl2 88 1496 0 1427 2 0 2 2 0 8 0 amappl1 80 12986 0 12451 13 1 12 13 0 8 0 amappl 88 10725 0 10571 5 0 5 5 0 92 0 uvmvnodes 80 124 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 7 0 7 1 1 0 1 0 8 0 dma128 128 254 0 254 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 72 128 0 8 3 0 3 3 0 8 0 uaddrrnd 24 1380 0 1352 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1380 0 1352 1 0 1 1 0 8 0 vmmpekpl 168 11899 0 11855 3 0 3 3 0 8 0 vmmpepl 168 91759 0 89917 100 12 88 95 0 357 0 vmsppl 368 1379 0 1352 4 1 3 4 0 8 0 rwobjpl 40 25465 0 24294 14 0 14 14 0 8 0 pdppl 4096 2774 0 2710 111 43 68 78 0 8 4 pvpl 32 646532 0 635274 144 23 121 132 0 265 7 pmappl 216 1383 0 1354 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 583 0 243 13 0 13 13 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(ffffffff8331355c) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806966f878,ffff80002ccea558) at vgonel+0x663 vrecycle(fffffd806966f878,ffff80002ccea558) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80003c931560) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806966f878,ffff80002ccea558) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806966f878) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806db23bd0,fffffd806966f878,ffff80003c9316c8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002ccea558,ffffff9c,7e7d14a76960,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80003c931830) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c931830) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7d14a76e10, 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(ffffffff8331355c) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806966f878,ffff80002ccea558) at vgonel+0x663 vrecycle(fffffd806966f878,ffff80002ccea558) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80003c931560) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806966f878,ffff80002ccea558) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806966f878) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806db23bd0,fffffd806966f878,ffff80003c9316c8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002ccea558,ffffff9c,7e7d14a76960,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80003c931830) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c931830) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7d14a76e10, count: -11