panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *245778 74284 0 0x2 0 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833339c6) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd8060a92b20,ffff8000ffffccd8) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd8060a92b20,ffff8000ffffccd8) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff80002a3be8e8) at ufs_inactive+0x360 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8060a92b20,ffff8000ffffccd8) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vput(fffffd8060a92b20) at vput+0xe5 sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd8061f1cbd8,fffffd8060a92b20,ffff80002a3bea68) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff8000ffffccd8,ffffff9c,77ad51e46610,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff80002a3bebe0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bebe0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77ad51e46ac0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: missing alias ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833339c6) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd8060a92b20,ffff8000ffffccd8) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd8060a92b20,ffff8000ffffccd8) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff80002a3be8e8) at ufs_inactive+0x360 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8060a92b20,ffff8000ffffccd8) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vput(fffffd8060a92b20) at vput+0xe5 sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd8061f1cbd8,fffffd8060a92b20,ffff80002a3bea68) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff8000ffffccd8,ffffff9c,77ad51e46610,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff80002a3bebe0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bebe0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77ad51e46ac0, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a3be720 rbx 0xffffffff838b0dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff8000ffffccd8 rax 0xffffffff838afff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0x8080808080808080 r10 0x1d40d4a0fec4befa r11 0xb0947001ca530f5 r12 0xffffffff838b0bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff81b79b05 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a3be710 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=245778 pid=74284 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=0xffff80002a2d8ce8,0xffff8000fffea7e0 process=0xffff8000fffee558 user=0xffff80002a3b9000, vmspace=0xfffffd806eba73c8 estcpu=36, cpticks=0, pctcpu=0.1, user=4, sys=150, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 42527 208202 78851 0 2 0 syz-executor 54281 217395 2673 0 2 0 syz-executor 54281 430764 2673 0 2 0x4000000 syz-executor 54281 448942 2673 0 3 0x4000080 fsleep syz-executor 50988 333665 5372 0 2 0 syz-executor 2673 36663 1069 0 2 0x482 syz-executor 70942 189290 7194 0 2 0x10 syz-executor 70942 427399 7194 0 3 0x4000090 fsleep syz-executor 62538 339214 71448 0 3 0 vmmaplk syz-executor 62538 242936 71448 0 2 0x4000000 syz-executor 80113 477612 1069 0 2 0x2 syz-executor 71448 156153 1069 0 2 0x482 syz-executor 61938 295615 1069 0 2 0x2 syz-executor 7194 422149 1069 0 2 0x482 syz-executor 7838 431116 0 0 3 0x14280 nfsidl nfsio 85315 71670 0 0 3 0x14280 nfsidl nfsio 41103 371595 0 0 3 0x14280 nfsidl nfsio 18690 51352 0 0 3 0x14280 nfsidl nfsio 84701 251291 0 0 3 0x14280 nfsidl nfsio 85629 34908 0 0 3 0x14280 nfsidl nfsio 76141 424161 0 0 3 0x14280 nfsidl nfsio 18443 388202 0 0 3 0x14280 nfsidl nfsio 15895 332808 0 0 3 0x14280 nfsidl nfsio 99762 431286 0 0 3 0x14280 nfsidl nfsio 96863 369298 0 0 3 0x14280 nfsidl nfsio 86017 315798 0 0 3 0x14280 nfsidl nfsio 74648 210617 0 0 3 0x14280 nfsidl nfsio 21144 306048 0 0 3 0x14280 nfsidl nfsio 31972 382744 0 0 3 0x14280 nfsidl nfsio 67042 386732 0 0 3 0x14280 nfsidl nfsio 24943 307130 0 0 3 0x14280 nfsidl nfsio 98620 416653 0 0 3 0x14280 nfsidl nfsio 76666 379937 0 0 3 0x14280 nfsidl nfsio 24774 322787 0 0 3 0x14280 nfsidl nfsio 5372 100606 1069 0 2 0x482 syz-executor 59513 353696 0 0 3 0x14200 bored sosplice *74284 245778 1069 0 7 0x2 syz-executor 78851 22764 1069 0 3 0x82 nanoslp syz-executor 1069 246612 49056 0 3 0x82 kqread syz-executor 49056 25843 29582 0 3 0x10008a sigsusp ksh 29582 185023 73417 0 3 0x98 kqread sshd-session 73417 226668 14464 0 3 0x92 kqread sshd-session 56564 379793 1 0 3 0x100083 ttyin getty 14464 65956 1 0 3 0x88 kqread sshd 83399 273716 72873 74 3 0x1100092 bpf pflogd 72873 35559 1 0 3 0x80 sbwait pflogd 14517 52735 31396 73 3 0x1100090 kqread syslogd 31396 276052 1 0 3 0x100082 sbwait syslogd 23969 253202 1 0 3 0x100080 kqread resolvd 12492 108831 57228 77 3 0x100092 kqread dhcpleased 2453 66349 57228 77 3 0x100092 kqread dhcpleased 57228 363359 1 0 3 0x80 kqread dhcpleased 40587 481769 0 0 3 0x14200 bored smr 37923 362248 0 0 2 0x14200 zerothread 30392 321761 0 0 3 0x14200 aiodoned aiodoned 44334 475692 0 0 3 0x14200 syncer update 38994 417661 0 0 3 0x14200 cleaner cleaner 66922 210939 0 0 3 0x14200 reaper reaper 9867 230410 0 0 3 0x14200 pgdaemon pagedaemon 30434 85677 0 0 3 0x14200 bored viomb 51506 218458 0 0 3 0x40014200 acpi0 acpi0 59790 311124 0 0 7 0x40014200 idle1 59045 118086 0 0 3 0x14200 bored softnet3 21596 103191 0 0 3 0x14200 bored softnet2 17561 341251 0 0 3 0x14200 bored softnet1 94711 400180 0 0 3 0x14200 bored softnet0 93449 453076 0 0 3 0x14200 bored systqmp 70590 380679 0 0 3 0x14200 bored systq 13931 87286 0 0 3 0x14200 tmoslp softclockmp 63346 176725 0 0 2 0x40014200 softclock 74727 186720 0 0 3 0x40014200 idle0 1 505063 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 62538 (syz-executor) thread 0xffff80003c440038 (242936) Process 80113 (syz-executor) thread 0xffff8000fffea540 (477612) Process 74284 (syz-executor) thread 0xffff8000ffffccd8 (245778) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10245 11052K 11439K 166960K 13907 0 pcb 17 17K 19K 166960K 478 0 rtable 192 11K 12K 166960K 847 0 pf 42 19K 22K 166960K 169 0 ifaddr 38 6K 8K 166960K 144 0 ifgroup 64 2K 2K 166960K 218 0 sysctl 3 1K 1K 166960K 11 0 counters 68 36K 37K 166960K 346 0 ioctlops 0 0K 4K 166960K 1833 0 iov 1 2K 20K 166960K 76 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1464 92K 93K 166960K 3091 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 36K 40K 166960K 25 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 122 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 1838 0 sigio 0 0K 0K 166960K 17 0 proc 73 91K 140K 166960K 999 0 subproc 72 4K 4K 166960K 173 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 294 0 in_multi 71 5K 7K 166960K 267 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 301 1341K 1341K 166960K 301 0 exec 0 0K 1K 166960K 817 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 213 159K 177K 166960K 18531 0 UVM aobj 64 7K 7K 166960K 65 0 pinsyscall 42 84K 108K 166960K 3259 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 109 0 NDP 18 0K 2K 166960K 101 0 temp 76 8692K 8760K 166960K 70266 0 kqueue 13 20K 30K 166960K 286 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 229 0 225 3 2 1 3 0 8 0 rtentry 176 267 0 192 6 0 6 6 0 8 0 unpcb 144 1815 0 1798 19 18 1 6 0 8 0 syncache 336 8 0 8 3 3 0 1 0 8 0 tcpqe 32 3 0 3 3 3 0 1 0 8 0 tcpcb 808 728 0 723 31 24 7 14 0 8 6 arp 128 44 0 28 1 0 1 1 0 8 0 inpcb 384 2244 0 2232 43 35 8 15 0 8 6 nd6 144 63 0 48 2 0 2 2 0 8 0 pkpcb 40 77 0 77 7 6 1 1 0 8 1 kcovpl 48 19 0 11 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 114 0 114 5 4 1 1 0 8 1 pppxif 1504 7 0 7 2 2 0 1 0 8 0 pffrag 232 11 0 6 1 0 1 1 0 482 0 pffrnode 88 11 0 6 1 0 1 1 0 8 0 pffrent 40 18 0 13 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 3 0 1 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 97 0 74 1 0 1 1 0 8 0 pfstkey 128 98 0 75 2 0 2 2 0 8 0 pfstate 384 95 0 72 5 1 4 5 0 8 0 pfrule 1344 26 0 20 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1142 0 820 35 11 24 29 0 8 3 art_table 32 1144 0 820 4 0 4 4 0 8 0 art_node 16 260 0 194 1 0 1 1 0 8 0 sysvmsgpl 40 65 0 54 1 0 1 1 0 8 0 semupl 112 4 0 4 3 3 0 1 0 8 0 semapl 112 119 0 109 1 0 1 1 0 8 0 shmpl 112 62 0 1 2 0 2 2 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 4516 0 2996 96 0 96 96 0 8 0 ffsino 288 4516 0 2996 109 0 109 109 0 8 0 nchpl 144 6875 0 5156 64 0 64 64 0 8 0 rtmask 32 10 0 10 4 4 0 1 0 8 0 uvmvnodes 80 4961 0 0 102 0 102 102 0 8 0 vnodes 216 4961 0 0 276 0 276 276 0 8 0 namei 1024 26602 0 26602 3 2 1 2 0 8 1 percpumem 16 188 0 139 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 124 0 96 6 4 2 3 0 8 0 scsiplug 72 7 0 7 3 3 0 1 0 8 0 scxspl 216 20740 0 20740 15 13 2 8 1 8 2 plimitpl 152 384 0 367 1 0 1 1 0 8 0 sigapl 424 2151 0 2081 10 1 9 9 0 8 0 futexpl 64 24617 0 24615 1 0 1 1 0 8 0 knotepl 120 596 0 0 18 0 18 18 0 8 0 kqueuepl 224 744 0 735 14 9 5 5 0 8 4 pipepl 336 310 0 283 8 5 3 8 0 8 0 fdescpl 520 2112 0 2081 3 0 3 3 0 8 0 filepl 160 15232 0 15018 41 28 13 22 0 8 0 lockfpl 104 428 0 418 1 0 1 1 0 8 0 lockfspl 48 189 0 179 1 0 1 1 0 8 0 sessionpl 144 38 0 29 1 0 1 1 0 8 0 pgrppl 48 73 0 56 1 0 1 1 0 8 0 ucredpl 104 2516 0 2502 1 0 1 1 0 8 0 zombiepl 144 2968 0 2968 1 0 1 1 0 8 1 processpl 1192 2151 0 2081 6 0 6 6 0 8 0 procpl 656 4900 0 4826 8 0 8 8 0 8 0 srpgc 96 16 0 16 4 3 1 1 0 8 1 sosppl 168 9 0 9 5 4 1 1 0 8 1 sockpl 728 4455 0 4425 60 51 9 27 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 99 0 0 3 0 3 3 0 8 0 mbufpl 256 321 0 0 18 0 18 18 0 8 0 bufpl 280 6552 0 409 439 0 439 439 0 8 0 anonpl 32 11674 0 0 94 0 94 94 0 246 0 amapchunkpl 152 61445 0 60981 50 24 26 32 0 158 1 amappl16 200 6314 0 6055 76 62 14 18 0 8 0 amappl14 184 146 0 134 1 0 1 1 0 8 0 amappl13 176 8 0 8 3 3 0 1 0 8 0 amappl12 168 2948 0 2920 3 1 2 2 0 8 0 amappl11 160 54 0 39 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 136 0 123 1 0 1 1 0 8 0 amappl6 120 293 0 289 1 0 1 1 0 8 0 amappl5 112 173 0 163 1 0 1 1 0 8 0 amappl4 104 453 0 434 1 0 1 1 0 8 0 amappl3 96 12475 0 12385 4 0 4 4 0 8 0 amappl2 88 846 0 784 2 0 2 2 0 8 0 amappl1 80 17066 0 16466 17 3 14 15 0 8 0 amappl 88 17297 0 17156 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 9 0 9 3 3 0 1 0 8 0 dma128 128 256 0 256 3 3 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 64 0 1 2 0 2 2 0 8 0 uaddrrnd 24 2111 0 2081 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2111 0 2081 1 0 1 1 0 8 0 vmmpekpl 168 18390 0 18331 3 0 3 3 0 8 0 vmmpepl 168 137894 0 135787 129 28 101 104 0 357 0 vmsppl 480 2110 0 2081 6 1 5 5 0 8 0 rwobjpl 72 42104 0 35944 115 1 114 115 0 8 0 pdppl 4096 4230 0 4162 126 52 74 88 0 8 6 pvpl 32 20309 0 0 166 2 164 164 0 265 0 pmappl 256 2110 0 2081 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 466 0 103 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833339c6) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd8060a92b20,ffff8000ffffccd8) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd8060a92b20,ffff8000ffffccd8) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff80002a3be8e8) at ufs_inactive+0x360 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8060a92b20,ffff8000ffffccd8) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vput(fffffd8060a92b20) at vput+0xe5 sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd8061f1cbd8,fffffd8060a92b20,ffff80002a3bea68) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff8000ffffccd8,ffffff9c,77ad51e46610,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff80002a3bebe0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bebe0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77ad51e46ac0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff8000299edff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff8000299edff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5