panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *389798 66528 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83312bfe) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c51aa78,ffff80002a7767d0) at vgonel+0x663 vrecycle(fffffd806c51aa78,ffff80002a7767d0) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a86dc20) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c51aa78,ffff80002a7767d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c51aa78) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c51a3b8,fffffd806c51aa78,ffff80002a86dd88) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7767d0,ffffff9c,78cbc2eea790,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86def0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86def0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78cbc2eeac40, 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(ffffffff83312bfe) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c51aa78,ffff80002a7767d0) at vgonel+0x663 vrecycle(fffffd806c51aa78,ffff80002a7767d0) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a86dc20) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c51aa78,ffff80002a7767d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c51aa78) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c51a3b8,fffffd806c51aa78,ffff80002a86dd88) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7767d0,ffffff9c,78cbc2eea790,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86def0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86def0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78cbc2eeac40, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a86da60 rbx 0xfffffd806c51aa78 rdx 0 rcx 0 rax 0xffff80002a7767d0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x153db8c928a69d74 r11 0xb53bf8839d82416d r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff81637ef5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a86da50 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=389798 pid=66528 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=0xffff80002a7b3a00,0xffff80002a777770 process=0xffff80002a7dc010 user=0xffff80002a868000, vmspace=0xfffffd807e8ae8a8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 58207 313303 4665 0 2 0 syz-executor 58207 65112 4665 0 3 0x4000080 fsleep syz-executor 51942 403296 24061 0 2 0 syz-executor 51942 65248 24061 0 3 0x4000080 bpf syz-executor 46672 403392 58486 0 2 0 syz-executor 46672 19774 58486 0 3 0x4000080 fsleep syz-executor 75480 39940 82450 0 2 0 syz-executor 75480 85230 82450 0 3 0x4000080 fsleep syz-executor 75480 382463 82450 0 3 0x4000080 fsleep syz-executor 82450 437388 87933 0 3 0x82 nanoslp syz-executor 24061 325428 87933 0 3 0x82 nanoslp syz-executor 52862 252227 87933 0 3 0x82 nanoslp syz-executor 25769 300021 87933 0 2 0x3 syz-executor *66528 389798 87933 0 7 0x2 syz-executor 71067 245295 87933 0 2 0x3 syz-executor 58486 502991 87933 0 3 0x82 nanoslp syz-executor 4665 285850 87933 0 3 0x82 nanoslp syz-executor 87933 413330 54861 0 3 0x82 kqread syz-executor 54861 363288 61920 0 3 0x10008a sigsusp ksh 61920 366974 82182 0 3 0x98 kqread sshd-session 82182 22555 49125 0 3 0x92 kqread sshd-session 93486 330230 1 0 3 0x100083 ttyin getty 49125 197737 1 0 3 0x88 kqread sshd 72938 213910 34222 73 3 0x1100090 kqread syslogd 34222 262764 1 0 3 0x100082 sbwait syslogd 23050 361773 1 0 3 0x100080 kqread resolvd 87757 509644 90603 77 3 0x100092 kqread dhcpleased 64592 377278 90603 77 3 0x100092 kqread dhcpleased 90603 462188 1 0 3 0x80 kqread dhcpleased 55582 458711 0 0 3 0x14200 bored smr 30901 344868 0 0 2 0x14200 zerothread 16691 253030 0 0 3 0x14200 aiodoned aiodoned 26742 258037 0 0 3 0x14200 syncer update 68737 216014 0 0 3 0x14200 cleaner cleaner 46186 517710 0 0 2 0x14200 reaper 81566 193679 0 0 3 0x14200 pgdaemon pagedaemon 30300 368370 0 0 3 0x14200 bored viomb 50594 323569 0 0 3 0x40014200 acpi0 acpi0 64838 167821 0 0 3 0x14200 bored softnet0 33365 464864 0 0 3 0x14200 bored systqmp 25114 178932 0 0 3 0x14200 bored systq 83694 471244 0 0 3 0x40014200 tmoslp softclock 71646 184968 0 0 3 0x40014200 idle0 1 278838 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 11041 12168K 12347K 166960K 12223 0 pcb 18 13K 14K 166960K 86 0 rtable 221 6K 6K 166960K 362 0 pf 30 12K 12K 166960K 30 0 ifaddr 42 7K 7K 166960K 45 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 33 17K 17K 166960K 33 0 ioctlops 0 0K 2K 166960K 37 0 iov 0 0K 0K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1410 89K 89K 166960K 1485 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 12 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 49K 89K 166960K 201 0 proc 60 59K 75K 166960K 483 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 7 0 in_multi 99 7K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 2 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 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 364 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 203 158K 165K 166960K 3568 0 UVM aobj 7 2K 2K 166960K 8 0 pinsyscall 35 70K 92K 166960K 1279 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 11 0K 2K 166960K 27 0 temp 41 8663K 8727K 166960K 8625 0 kqueue 13 20K 26K 166960K 31 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 43 0 40 1 0 1 1 0 8 0 rtentry 136 114 0 12 4 0 4 4 0 8 0 unpcb 144 130 0 113 3 0 3 3 0 8 2 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 62 0 57 4 3 1 4 0 8 0 arp 96 18 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 183 0 174 8 6 2 7 0 8 0 nd6 112 26 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 488 0 41 31 1 30 31 0 8 0 art_table 40 489 0 41 5 0 5 5 0 8 0 art_node 32 114 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 10 0 2 1 0 1 1 0 8 0 shmpl 112 5 0 1 2 1 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1669 0 162 95 0 95 95 0 8 0 ffsino 256 1669 0 162 95 0 95 95 0 8 0 nchpl 144 1962 0 268 63 0 63 63 0 8 0 vnodes 216 1851 0 0 103 0 103 103 0 8 0 namei 1024 5795 0 5795 2 1 1 1 0 8 1 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6130 0 6130 3 2 1 3 1 8 1 plimitpl 152 38 0 22 1 0 1 1 0 8 0 sigapl 424 490 0 450 6 1 5 6 0 8 0 knotepl 120 21563 0 21516 17 15 2 17 0 8 0 kqueuepl 184 33 0 24 1 0 1 1 0 8 0 pipepl 304 186 0 159 3 0 3 3 0 8 0 fdescpl 448 477 0 451 5 1 4 5 0 8 0 filepl 120 2103 0 1888 12 1 11 11 0 8 3 lockfpl 104 167 0 165 2 0 2 2 0 8 1 lockfspl 48 80 0 78 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 29 0 13 1 0 1 1 0 8 0 ucredpl 104 137 0 125 1 0 1 1 0 8 0 zombiepl 144 484 0 483 3 2 1 1 0 8 0 processpl 1152 490 0 450 4 0 4 4 0 8 0 procpl 664 617 0 571 5 0 5 5 0 8 0 sockpl 552 361 0 332 12 5 7 8 0 8 4 mcl64k 65536 4 0 3 1 0 1 1 0 8 0 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 6 0 6 2 1 1 1 0 8 1 mcl4k 4096 2542 0 2487 15 7 8 15 0 8 0 mcl2k 2048 295 0 291 2 1 1 1 0 8 0 mtagpl 96 7 0 4 2 1 1 1 0 8 0 mbufpl 256 4734 0 4547 13 0 13 13 0 8 1 bufpl 280 3407 0 119 235 0 235 235 0 8 0 anonpl 24 97248 0 94427 47 3 44 44 0 187 24 amapchunkpl 152 9937 0 9551 23 2 21 21 0 158 2 amappl16 200 1745 0 1727 18 8 10 14 0 8 8 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 6 0 6 1 1 0 1 0 8 0 amappl13 176 408 0 407 1 0 1 1 0 8 0 amappl12 168 827 0 792 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 1 0 1 0 8 0 amappl10 152 43 0 33 1 0 1 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 27 0 26 1 0 1 1 0 8 0 amappl7 128 88 0 87 1 0 1 1 0 8 0 amappl6 120 269 0 258 1 0 1 1 0 8 0 amappl5 112 80 0 73 1 0 1 1 0 8 0 amappl4 104 374 0 351 1 0 1 1 0 8 0 amappl3 96 1723 0 1639 3 0 3 3 0 8 0 amappl2 88 524 0 470 2 0 2 2 0 8 0 amappl1 80 9018 0 8497 12 0 12 12 0 8 0 amappl 88 2862 0 2728 4 0 4 4 0 92 0 uvmvnodes 80 96 0 0 2 0 2 2 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 477 0 451 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 477 0 451 1 0 1 1 0 8 0 vmmpekpl 168 5718 0 5685 2 0 2 2 0 8 0 vmmpepl 168 38145 0 36558 93 3 90 90 0 357 11 vmsppl 368 476 0 450 4 1 3 4 0 8 0 rwobjpl 40 13632 0 12741 12 0 12 12 0 8 2 pdppl 4096 960 0 900 92 26 66 78 0 8 6 pvpl 32 228932 0 221384 107 6 101 101 0 265 27 pmappl 216 476 0 450 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 370 0 45 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(ffffffff83312bfe) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c51aa78,ffff80002a7767d0) at vgonel+0x663 vrecycle(fffffd806c51aa78,ffff80002a7767d0) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a86dc20) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c51aa78,ffff80002a7767d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c51aa78) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c51a3b8,fffffd806c51aa78,ffff80002a86dd88) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7767d0,ffffff9c,78cbc2eea790,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86def0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86def0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78cbc2eeac40, 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(ffffffff83312bfe) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd806c51aa78,ffff80002a7767d0) at vgonel+0x663 vrecycle(fffffd806c51aa78,ffff80002a7767d0) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a86dc20) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806c51aa78,ffff80002a7767d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd806c51aa78) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c51a3b8,fffffd806c51aa78,ffff80002a86dd88) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7767d0,ffffff9c,78cbc2eea790,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a86def0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86def0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78cbc2eeac40, count: -11