panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *293174 51538 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8330de70) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8068657bf8,ffff80002a776d00) at vgonel+0x663 vrecycle(fffffd8068657bf8,ffff80002a776d00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a86d510) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8068657bf8,ffff80002a776d00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd8068657bf8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd8068657970,fffffd8068657bf8,ffff80002a86d678) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a776d00,ffffff9c,758ec3f0e6e0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86d7e0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86d7e0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x758ec3f0eb90, 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(ffffffff8330de70) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8068657bf8,ffff80002a776d00) at vgonel+0x663 vrecycle(fffffd8068657bf8,ffff80002a776d00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a86d510) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8068657bf8,ffff80002a776d00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd8068657bf8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd8068657970,fffffd8068657bf8,ffff80002a86d678) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a776d00,ffffff9c,758ec3f0e6e0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86d7e0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86d7e0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x758ec3f0eb90, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a86d350 rbx 0xfffffd8068657bf8 rdx 0 rcx 0 rax 0xffff80002a776d00 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd65e8223f56cf392 r11 0x9e00d7d4c0ac196a r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff82171825 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a86d340 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=293174 pid=51538 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=0xffff80002a7b9c98,0xffff80002a776018 process=0xffff80002a7ddb10 user=0xffff80002a868000, vmspace=0xfffffd807118a738 estcpu=36, cpticks=4, pctcpu=0.0, user=1, sys=3, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 54834 90253 13458 0 2 0 syz-executor 54736 504038 64478 0 2 0 syz-executor 54736 515361 64478 0 2 0x4000000 syz-executor 3160 248873 47938 0 2 0 syz-executor 3160 376612 47938 0 3 0x4000080 fsleep syz-executor 5436 490296 98306 0 2 0 syz-executor 5436 499298 98306 0 3 0x4000080 fsleep syz-executor 14596 254204 66911 0 2 0 syz-executor 14596 198853 66911 0 3 0x4000080 fsleep syz-executor 83186 425603 85433 0 2 0 syz-executor 83186 280718 85433 0 3 0x4000080 fsleep syz-executor 83186 229875 85433 0 3 0x4000080 fsleep syz-executor 90604 19765 83168 0 2 0 syz-executor 90604 45500 83168 0 3 0x4000080 fsleep syz-executor 90604 5234 83168 0 3 0x4000080 fsleep syz-executor 90604 129196 83168 0 3 0x4000080 fsleep syz-executor 66911 381071 72580 0 3 0x82 nanoslp syz-executor 13458 253859 72580 0 2 0x2 syz-executor 64478 373500 72580 0 3 0x82 nanoslp syz-executor 83168 221671 72580 0 3 0x82 nanoslp syz-executor *51538 293174 72580 0 7 0x2 syz-executor 98306 4739 72580 0 3 0x82 nanoslp syz-executor 85433 466005 72580 0 3 0x82 nanoslp syz-executor 47938 479456 72580 0 3 0x82 nanoslp syz-executor 72580 328795 77286 0 3 0x82 kqread syz-executor 77286 43245 41516 0 3 0x10008a sigsusp ksh 41516 124623 18238 0 3 0x98 kqread sshd-session 18238 224581 34337 0 3 0x92 kqread sshd-session 47187 332043 1 0 3 0x100083 ttyin getty 34337 466736 1 0 3 0x88 kqread sshd 2473 62367 58257 73 3 0x1100090 kqread syslogd 58257 385063 1 0 3 0x100082 sbwait syslogd 1833 82 1 0 3 0x100080 kqread resolvd 32328 30109 52917 77 3 0x100092 kqread dhcpleased 39462 283441 52917 77 3 0x100092 kqread dhcpleased 52917 188419 1 0 3 0x80 kqread dhcpleased 3582 399209 0 0 3 0x14200 bored smr 99582 180457 0 0 2 0x14200 zerothread 80650 325849 0 0 3 0x14200 aiodoned aiodoned 25186 136218 0 0 3 0x14200 syncer update 63112 426063 0 0 3 0x14200 cleaner cleaner 75207 133347 0 0 3 0x14200 reaper reaper 99887 510418 0 0 3 0x14200 pgdaemon pagedaemon 74983 121636 0 0 3 0x14200 bored viomb 90820 93175 0 0 3 0x40014200 acpi0 acpi0 5847 51777 0 0 3 0x14200 bored softnet0 72724 299023 0 0 3 0x14200 bored systqmp 11785 507970 0 0 3 0x14200 bored systq 57487 20321 0 0 3 0x40014200 tmoslp softclock 30163 43928 0 0 3 0x40014200 idle0 1 390132 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 11048 12299K 12380K 166960K 12380 0 pcb 18 14K 16K 166960K 115 0 rtable 205 7K 7K 166960K 378 0 pf 33 13K 14K 166960K 48 0 ifaddr 39 6K 7K 166960K 54 0 ifgroup 54 2K 2K 166960K 71 0 sysctl 1 1K 9K 166960K 71 0 counters 34 17K 18K 166960K 44 0 ioctlops 0 0K 4K 166960K 73 0 iov 1 12K 20K 166960K 43 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1408 89K 89K 166960K 1533 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 253 0 sigio 0 0K 0K 166960K 1 0 proc 60 59K 83K 166960K 486 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 23 0 in_multi 85 6K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 373 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 219 159K 168K 166960K 4142 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 38 76K 92K 166960K 1336 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 12 0K 2K 166960K 35 0 temp 38 8659K 8786K 166960K 10057 0 kqueue 13 20K 32K 166960K 54 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 78 0 75 2 0 2 2 0 8 1 rtentry 136 112 0 23 4 0 4 4 0 8 0 unpcb 144 121 0 103 1 0 1 1 0 8 0 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 51 0 42 1 0 1 1 0 8 0 arp 96 18 0 2 1 0 1 1 0 8 0 inpcb 328 225 0 209 7 0 7 7 0 8 5 ip6q 72 1 0 0 1 0 1 1 0 8 0 nd6 112 25 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 9 0 9 1 0 1 1 0 8 1 pfstkey 128 1 0 1 1 0 1 1 0 8 1 pfstate 384 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 454 0 85 29 0 29 29 0 8 3 art_table 40 455 0 85 5 0 5 5 0 8 0 art_node 32 112 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1795 0 291 95 0 95 95 0 8 0 ffsino 256 1795 0 291 95 0 95 95 0 8 0 nchpl 144 2137 0 445 63 0 63 63 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 vnodes 216 1999 0 0 112 0 112 112 0 8 0 namei 1024 6739 0 6739 6 2 4 4 0 8 4 kstatmem 264 38 0 14 3 0 3 3 0 8 1 scxspl 216 6741 0 6741 3 2 1 3 1 8 1 plimitpl 152 41 0 24 1 0 1 1 0 8 0 sigapl 424 543 0 501 6 1 5 6 0 8 0 knotepl 120 7672 0 7625 17 7 10 17 0 8 8 kqueuepl 184 122 0 113 4 0 4 4 0 8 3 pipepl 304 124 0 97 3 0 3 3 0 8 0 fdescpl 448 530 0 501 5 1 4 5 0 8 0 filepl 120 2552 0 2325 11 0 11 11 0 8 4 lockfpl 104 119 0 116 1 0 1 1 0 8 0 lockfspl 48 27 0 24 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 32 0 16 1 0 1 1 0 8 0 ucredpl 104 174 0 163 1 0 1 1 0 8 0 zombiepl 144 605 0 605 2 1 1 1 0 8 1 processpl 1152 543 0 501 4 0 4 4 0 8 0 procpl 664 779 0 728 7 1 6 6 0 8 1 sockpl 552 431 0 394 8 1 7 7 0 8 4 mcl64k 65536 12 0 12 1 0 1 1 0 8 1 mcl16k 16384 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 6 0 6 2 1 1 1 0 8 1 mcl4k 4096 2607 0 2551 14 4 10 14 0 8 2 mcl2k 2048 378 0 375 2 1 1 1 0 8 0 mtagpl 96 11 0 5 2 1 1 1 0 8 0 mbufpl 256 5445 0 5247 14 1 13 13 0 8 0 bufpl 280 2548 0 119 174 0 174 174 0 8 0 anonpl 24 105987 0 102912 36 4 32 32 0 187 11 amapchunkpl 152 12042 0 11611 25 0 25 25 0 158 5 amappl16 200 1736 0 1707 7 4 3 5 0 8 1 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 407 0 406 1 0 1 1 0 8 0 amappl12 168 874 0 837 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 1 0 1 0 8 0 amappl10 152 47 0 37 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 33 0 32 1 0 1 1 0 8 0 amappl7 128 77 0 76 1 0 1 1 0 8 0 amappl6 120 274 0 263 1 0 1 1 0 8 0 amappl5 112 73 0 66 1 0 1 1 0 8 0 amappl4 104 377 0 353 1 0 1 1 0 8 0 amappl3 96 2154 0 2058 3 0 3 3 0 8 0 amappl2 88 518 0 464 2 0 2 2 0 8 0 amappl1 80 9532 0 8997 13 0 13 13 0 8 1 amappl 88 3414 0 3266 5 0 5 5 0 92 0 uvmvnodes 80 101 0 0 3 0 3 3 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 128 253 0 253 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 530 0 501 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 530 0 501 1 0 1 1 0 8 0 vmmpekpl 168 6074 0 6049 2 0 2 2 0 8 0 vmmpepl 168 41676 0 39922 87 3 84 84 0 357 4 vmsppl 368 529 0 501 4 1 3 4 0 8 0 rwobjpl 40 14559 0 13631 12 1 11 11 0 8 1 pdppl 4096 1067 0 1002 99 32 67 79 0 8 2 pvpl 32 257472 0 249004 100 1 99 99 0 265 25 pmappl 216 529 0 501 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 377 0 46 10 0 10 10 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(ffffffff8330de70) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8068657bf8,ffff80002a776d00) at vgonel+0x663 vrecycle(fffffd8068657bf8,ffff80002a776d00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a86d510) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8068657bf8,ffff80002a776d00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd8068657bf8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd8068657970,fffffd8068657bf8,ffff80002a86d678) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a776d00,ffffff9c,758ec3f0e6e0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86d7e0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86d7e0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x758ec3f0eb90, 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(ffffffff8330de70) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8068657bf8,ffff80002a776d00) at vgonel+0x663 vrecycle(fffffd8068657bf8,ffff80002a776d00) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a86d510) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8068657bf8,ffff80002a776d00) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd8068657bf8) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd8068657970,fffffd8068657bf8,ffff80002a86d678) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a776d00,ffffff9c,758ec3f0e6e0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86d7e0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86d7e0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x758ec3f0eb90, count: -11