panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *189485 24388 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8331262d) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805fa310f8,ffff80002a7d1200) at vgonel+0x681 sys/kern/vfs_subr.c:1217 vrecycle(fffffd805fa310f8,ffff80002a7d1200) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a8b9648) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805fa310f8,ffff80002a7d1200) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:498 vput(fffffd805fa310f8) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd805fa31da0,fffffd805fa310f8,ffff80002a8b97c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7d1200,ffffff9c,7be0d5922850,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1900 syscall(ffff80002a8b9940) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8b9940) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7be0d5922d00, 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(ffffffff8331262d) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805fa310f8,ffff80002a7d1200) at vgonel+0x681 sys/kern/vfs_subr.c:1217 vrecycle(fffffd805fa310f8,ffff80002a7d1200) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a8b9648) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805fa310f8,ffff80002a7d1200) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:498 vput(fffffd805fa310f8) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd805fa31da0,fffffd805fa310f8,ffff80002a8b97c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7d1200,ffffff9c,7be0d5922850,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1900 syscall(ffff80002a8b9940) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8b9940) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7be0d5922d00, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a8b9490 rbx 0 rdx 0 rcx 0 rax 0xffff80002a7d1200 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb9059f6f3b95b626 r11 0xc783b60889dec9cd r12 0 r13 0x800 r14 0 r15 0x1 rip 0xffffffff83270965 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a8b9480 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=189485 pid=24388 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=0xffff80002a7d07c0,0xffff80002a7e39c8 process=0xffff80002a785fc0 user=0xffff80002a8b4000, vmspace=0xfffffd807e0f4cb0 estcpu=36, cpticks=0, pctcpu=0.0, user=2, sys=7, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 19391 480117 37342 0 2 0 syz-executor 88166 118102 99706 0 2 0x2 syz-executor 89111 21575 97828 0 3 0x80 nanoslp syz-executor 89111 45013 97828 0 3 0x4000080 fsleep syz-executor 89111 31354 97828 0 3 0x4000080 fsleep syz-executor 44300 504696 76294 0 2 0 syz-executor 44300 193971 76294 0 3 0x4000080 fsleep syz-executor 46586 505533 92075 -1 2 0x10 syz-executor 46586 253259 92075 -1 3 0x4000090 fsleep syz-executor 95555 195695 10256 -1 2 0x10 syz-executor 95555 192408 10256 -1 3 0x4000090 fsleep syz-executor 20979 138662 79810 0 2 0 syz-executor 20979 213282 79810 0 3 0x4000080 fsleep syz-executor 20979 170287 79810 0 3 0x4000080 fsleep syz-executor 10256 474820 99706 0 3 0x82 nanoslp syz-executor 77118 41616 0 0 3 0x14200 acct acct 4277 407174 1 0 3 0x100083 ttyin getty 45869 129510 0 0 3 0x14280 nfsidl nfsio 9452 23989 0 0 3 0x14280 nfsidl nfsio 85907 101387 0 0 3 0x14280 nfsidl nfsio 59608 59006 0 0 3 0x14280 nfsidl nfsio 6600 455607 0 0 3 0x14280 nfsidl nfsio 38713 482323 0 0 3 0x14280 nfsidl nfsio 90391 507350 0 0 3 0x14280 nfsidl nfsio 94576 499994 0 0 3 0x14280 nfsidl nfsio 79659 380917 0 0 3 0x14280 nfsidl nfsio 84781 297814 0 0 3 0x14280 nfsidl nfsio 32032 296016 0 0 3 0x14280 nfsidl nfsio 95326 200415 0 0 3 0x14280 nfsidl nfsio 9590 416190 0 0 3 0x14280 nfsidl nfsio 14594 198256 0 0 3 0x14280 nfsidl nfsio 18035 1746 0 0 3 0x14280 nfsidl nfsio 45088 97262 0 0 3 0x14280 nfsidl nfsio 99446 238842 0 0 3 0x14280 nfsidl nfsio 26434 434554 0 0 3 0x14280 nfsidl nfsio 70851 37482 0 0 3 0x14280 nfsidl nfsio 33888 452016 0 0 3 0x14280 nfsidl nfsio 44891 370485 0 0 3 0x14200 bored sosplice 92075 203839 99706 0 3 0x82 nanoslp syz-executor *24388 189485 99706 0 7 0x2 syz-executor 79810 154685 99706 0 3 0x82 nanoslp syz-executor 37342 382316 99706 0 3 0x82 nanoslp syz-executor 76294 495331 99706 0 3 0x82 nanoslp syz-executor 97828 43322 99706 0 3 0x82 nanoslp syz-executor 99706 350708 50316 0 3 0x82 kqread syz-executor 50316 277301 81327 0 3 0x10008a sigsusp ksh 81327 123417 25602 0 3 0x98 kqread sshd-session 25602 358686 37302 0 3 0x92 kqread sshd-session 37302 12577 1 0 3 0x88 kqread sshd 44620 448805 944 73 3 0x1100090 kqread syslogd 944 321374 1 0 3 0x100082 sbwait syslogd 97038 192267 1 0 3 0x100080 kqread resolvd 72599 333406 44262 77 3 0x100092 kqread dhcpleased 54697 299386 44262 77 3 0x100092 kqread dhcpleased 44262 301993 1 0 3 0x80 kqread dhcpleased 54394 124134 0 0 3 0x14200 bored smr 66368 139446 0 0 2 0x14200 zerothread 51268 392302 0 0 3 0x14200 aiodoned aiodoned 48787 43238 0 0 3 0x14200 syncer update 60965 157868 0 0 3 0x14200 cleaner cleaner 72279 284125 0 0 3 0x14200 reaper reaper 45012 408801 0 0 3 0x14200 pgdaemon pagedaemon 17978 447139 0 0 3 0x14200 bored viomb 31934 261361 0 0 3 0x40014200 acpi0 acpi0 71500 167110 0 0 3 0x14200 bored softnet3 75041 208620 0 0 3 0x14200 bored softnet2 92454 387946 0 0 3 0x14200 bored softnet1 28940 510112 0 0 3 0x14200 bored softnet0 30733 138860 0 0 3 0x14200 bored systqmp 15018 176639 0 0 3 0x14200 bored systq 77159 361901 0 0 3 0x40014200 tmoslp softclock 86820 285352 0 0 3 0x40014200 idle0 1 168212 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 10205 11052K 11541K 166960K 13421 0 pcb 19 14K 15K 166960K 183 0 rtable 173 8K 9K 166960K 560 0 pf 26 12K 20K 166960K 101 0 ifaddr 30 5K 7K 166960K 87 0 ifgroup 42 1K 2K 166960K 139 0 sysctl 3 1K 9K 166960K 16 0 counters 30 17K 18K 166960K 76 0 ioctlops 0 0K 4K 166960K 153 0 iov 0 0K 16K 166960K 61 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1399 88K 89K 166960K 2412 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 34 0 dirhash 12 2K 2K 166960K 48 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 54K 232K 166960K 1230 0 sigio 0 0K 0K 166960K 56 0 proc 60 59K 124K 166960K 623 0 subproc 63 3K 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 102 0 in_multi 60 4K 7K 166960K 149 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 6 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 592 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 205 150K 177K 166960K 12411 0 UVM aobj 80 4K 4K 166960K 82 0 pinsyscall 37 74K 96K 166960K 2286 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 111 0 NDP 9 0K 2K 166960K 58 0 temp 53 8683K 8755K 166960K 43243 0 kqueue 13 20K 34K 166960K 208 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 120 124 0 121 2 0 2 2 0 8 1 rtentry 136 151 0 79 4 0 4 4 0 8 0 unpcb 144 740 0 724 4 0 4 4 0 8 3 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 808 379 0 375 14 7 7 8 0 8 6 arp 88 21 0 7 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 3 0 2 1 0 1 1 0 8 0 inpcb 344 1236 0 1226 16 9 7 11 0 8 5 nd6 104 34 0 17 1 0 1 1 0 8 0 pkpcb 40 12 0 12 2 1 1 1 0 8 1 kcovpl 48 9 0 2 1 0 1 1 0 8 0 ppxss 1072 32 0 32 1 0 1 1 0 8 1 pppxif 1384 5 0 5 2 1 1 1 0 8 1 pfrktable 1344 1 0 1 1 0 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 256 697 0 400 29 3 26 29 0 8 6 art_table 32 699 0 400 4 0 4 4 0 8 0 art_node 16 146 0 81 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 6 1 0 1 1 0 8 0 semapl 112 28 0 18 1 0 1 1 0 8 0 shmpl 112 79 0 2 3 0 3 3 0 8 0 dirhash 1024 42 0 25 3 0 3 3 0 8 0 dino2pl 256 3633 0 2138 95 0 95 95 0 8 0 ffsino 248 3633 0 2138 95 0 95 95 0 8 0 nchpl 144 5298 0 3619 63 0 63 63 0 8 0 rtmask 32 3 0 3 2 1 1 1 0 8 1 uvmvnodes 80 4329 0 0 89 0 89 89 0 8 0 vnodes 216 4329 0 0 241 0 241 241 0 8 0 namei 1024 18716 0 18715 2 1 1 2 0 8 0 kstatmem 264 78 0 60 2 0 2 2 0 8 0 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 16913 0 16913 15 7 8 8 1 8 8 plimitpl 152 291 0 275 1 0 1 1 0 8 0 sigapl 424 1522 0 1456 8 0 8 8 0 8 0 knotepl 120 44560 0 44513 13 3 10 12 0 8 7 kqueuepl 184 466 0 457 7 3 4 4 0 8 3 pipepl 296 268 0 241 7 2 5 5 0 8 2 fdescpl 440 1481 0 1453 5 1 4 5 0 8 0 filepl 120 9112 0 8911 13 2 11 11 0 8 3 lockfpl 104 241 0 239 1 0 1 1 0 8 0 lockfspl 48 101 0 99 1 0 1 1 0 8 0 sessionpl 144 24 0 16 1 0 1 1 0 8 0 pgrppl 48 48 0 32 1 0 1 1 0 8 0 ucredpl 104 1525 0 1512 1 0 1 1 0 8 0 zombiepl 144 1705 0 1705 1 0 1 1 0 8 1 processpl 1160 1522 0 1456 5 0 5 5 0 8 0 procpl 656 3170 0 3097 9 1 8 8 0 8 0 sosppl 168 2 0 2 2 1 1 1 0 8 1 sockpl 528 2136 0 2107 14 7 7 10 0 8 4 mcl64k 65536 78 0 78 1 0 1 1 0 8 1 mcl16k 16384 8 0 8 1 1 0 1 0 8 0 mcl9k 9216 65 0 65 1 1 0 1 0 8 0 mcl8k 8192 17 0 17 2 1 1 1 0 8 1 mcl4k 4096 3924 0 3872 14 6 8 13 0 8 1 mcl2k2 2112 19 0 19 2 1 1 1 0 8 1 mcl2k 2048 1188 0 1184 4 2 2 3 0 8 1 mtagpl 96 56 0 34 2 0 2 2 0 8 1 mbufpl 256 17912 0 17780 133 111 22 76 0 8 8 bufpl 280 5260 0 123 367 0 367 367 0 8 0 anonpl 24 206047 0 203032 73 28 45 52 0 187 17 amapchunkpl 152 41693 0 41278 44 14 30 35 0 158 12 amappl16 200 3904 0 3873 35 20 15 19 0 8 11 amappl15 192 17 0 17 2 1 1 1 0 8 1 amappl14 184 114 0 103 1 0 1 1 0 8 0 amappl13 176 20 0 20 1 1 0 1 0 8 0 amappl12 168 2112 0 2085 3 1 2 3 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 34 0 33 1 0 1 1 0 8 0 amappl7 128 147 0 136 1 0 1 1 0 8 0 amappl6 120 183 0 179 1 0 1 1 0 8 0 amappl5 112 121 0 114 1 0 1 1 0 8 0 amappl4 104 292 0 276 1 0 1 1 0 8 0 amappl3 96 8397 0 8300 4 0 4 4 0 8 0 amappl2 88 655 0 599 2 0 2 2 0 8 0 amappl1 80 12809 0 12265 13 0 13 13 0 8 0 amappl 88 11507 0 11365 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 2 0 2 1 1 0 1 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 8 0 8 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 81 0 2 2 0 2 2 0 8 0 uaddrrnd 24 1481 0 1453 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1481 0 1453 1 0 1 1 0 8 0 vmmpekpl 168 12584 0 12540 3 0 3 3 0 8 0 vmmpepl 168 95908 0 94146 102 8 94 97 0 357 7 vmsppl 360 1480 0 1453 4 1 3 4 0 8 0 rwobjpl 32 29560 0 24335 45 0 45 45 0 8 1 pdppl 4096 2968 0 2906 110 44 66 82 0 8 4 pvpl 32 629445 0 621394 159 44 115 132 0 265 27 pmappl 216 1480 0 1453 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 416 0 181 10 1 9 9 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(ffffffff8331262d) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805fa310f8,ffff80002a7d1200) at vgonel+0x681 sys/kern/vfs_subr.c:1217 vrecycle(fffffd805fa310f8,ffff80002a7d1200) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a8b9648) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805fa310f8,ffff80002a7d1200) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:498 vput(fffffd805fa310f8) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd805fa31da0,fffffd805fa310f8,ffff80002a8b97c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7d1200,ffffff9c,7be0d5922850,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1900 syscall(ffff80002a8b9940) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8b9940) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7be0d5922d00, 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(ffffffff8331262d) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd805fa310f8,ffff80002a7d1200) at vgonel+0x681 sys/kern/vfs_subr.c:1217 vrecycle(fffffd805fa310f8,ffff80002a7d1200) at vrecycle+0x7c sys/kern/vfs_subr.c:1143 ufs_inactive(ffff80002a8b9648) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd805fa310f8,ffff80002a7d1200) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:498 vput(fffffd805fa310f8) at vput+0xdc sys/kern/vfs_subr.c:796 VOP_REMOVE(fffffd805fa31da0,fffffd805fa310f8,ffff80002a8b97c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7d1200,ffffff9c,7be0d5922850,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1900 syscall(ffff80002a8b9940) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8b9940) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7be0d5922d00, count: -11