panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *104339 80776 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82fb5305) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80618e46f0,ffff800037619460) at vgonel+0x681 sys/kern/vfs_subr.c:1200 vrecycle(fffffd80618e46f0,ffff800037619460) at vrecycle+0x7c sys/kern/vfs_subr.c:1126 ufs_inactive(ffff80002a56f148) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80618e46f0,ffff800037619460) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd80618e46f0) at vput+0xdc sys/kern/vfs_subr.c:779 VOP_REMOVE(fffffd806cbdf618,fffffd80618e46f0,ffff80002a56f2c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff800037619460,ffffff9c,71f742c46870,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff80002a56f440) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71f742c46d20, 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:437 panic(ffffffff82fb5305) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80618e46f0,ffff800037619460) at vgonel+0x681 sys/kern/vfs_subr.c:1200 vrecycle(fffffd80618e46f0,ffff800037619460) at vrecycle+0x7c sys/kern/vfs_subr.c:1126 ufs_inactive(ffff80002a56f148) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80618e46f0,ffff800037619460) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd80618e46f0) at vput+0xdc sys/kern/vfs_subr.c:779 VOP_REMOVE(fffffd806cbdf618,fffffd80618e46f0,ffff80002a56f2c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff800037619460,ffffff9c,71f742c46870,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff80002a56f440) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71f742c46d20, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a56ef90 rbx 0 rdx 0 rcx 0 rax 0xffff800037619460 r8 0x101010101010101 r9 0x8080808080808080 r10 0x66f0285ed5717f43 r11 0xa3a927c8f18c30f1 r12 0 r13 0x800 r14 0 r15 0x1 rip 0xffffffff82441425 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a56ef80 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=104339 pid=80776 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=0xffff80002a4b0010,0xffff80002a4b07b8 process=0xffff80002a5cf390 user=0xffff80002a56a000, vmspace=0xfffffd806c270c28 estcpu=36, cpticks=0, pctcpu=0.26, user=0, sys=37, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 53198 369115 68972 0 2 0 syz-executor 35803 359453 71570 0 2 0 syz-executor 35803 110204 71570 0 3 0x4000080 fsleep syz-executor 78520 413097 87132 0 3 0x10 futex syz-executor 78520 213798 87132 0 3 0x4000090 fsleep syz-executor 78520 44933 87132 0 3 0x4000090 fsleep syz-executor 78520 1139 87132 0 2 0x4000010 syz-executor 27905 159005 36579 0 3 0x3000 suspend syz-executor 27905 264048 36579 0 3 0x4081000 futex syz-executor 27905 106069 36579 0 3 0x4081000 futex syz-executor 27905 401599 36579 0 3 0x4081000 futex syz-executor 437 400335 51497 0 3 0 futex syz-executor 437 401561 51497 0 3 0x4000080 fsleep syz-executor 437 353767 51497 0 3 0x4000080 fsleep syz-executor 437 77065 51497 0 2 0x4000000 syz-executor 87114 191969 7173 0 2 0 syz-executor 87114 265968 7173 0 3 0x4000000 futex syz-executor 87114 497749 7173 0 3 0x4000080 fsleep syz-executor 89485 183379 14945 0 3 0x82 nanoslp syz-executor 87132 523904 14945 0 3 0x82 nanoslp syz-executor 36579 516439 14945 0 3 0x82 nanoslp syz-executor 68972 201900 14945 0 3 0x82 nanoslp syz-executor *80776 104339 14945 0 7 0x2 syz-executor 51497 322232 14945 0 3 0x82 nanoslp syz-executor 7173 492936 14945 0 3 0x82 nanoslp syz-executor 71570 7884 14945 0 3 0x82 nanoslp syz-executor 70667 9961 1 0 3 0x100083 ttyin getty 50574 179594 0 0 3 0x14200 acct acct 13997 103248 0 0 3 0x14200 bored sosplice 76791 27396 0 0 3 0x14280 nfsidl nfsio 45603 7629 0 0 3 0x14280 nfsidl nfsio 8085 312875 0 0 3 0x14280 nfsidl nfsio 39147 125055 0 0 3 0x14280 nfsidl nfsio 75493 48682 0 0 3 0x14280 nfsidl nfsio 99984 61204 0 0 3 0x14280 nfsidl nfsio 89395 10487 0 0 3 0x14280 nfsidl nfsio 42400 29728 0 0 3 0x14280 nfsidl nfsio 52935 143718 0 0 3 0x14280 nfsidl nfsio 91009 210688 0 0 3 0x14280 nfsidl nfsio 14609 438671 0 0 3 0x14280 nfsidl nfsio 76799 301095 0 0 3 0x14280 nfsidl nfsio 44974 126099 0 0 3 0x14280 nfsidl nfsio 80107 117107 0 0 3 0x14280 nfsidl nfsio 42570 210224 0 0 3 0x14280 nfsidl nfsio 49236 411519 0 0 3 0x14280 nfsidl nfsio 78714 338079 0 0 3 0x14280 nfsidl nfsio 11594 268650 0 0 3 0x14280 nfsidl nfsio 23576 289111 0 0 3 0x14280 nfsidl nfsio 36193 367224 0 0 3 0x14280 nfsidl nfsio 14945 179104 58986 0 3 0x82 kqread syz-executor 58986 206532 81478 0 3 0x10008a sigsusp ksh 81478 261706 85464 0 3 0x98 kqread sshd-session 85464 396872 16435 0 3 0x92 kqread sshd-session 16435 4266 1 0 3 0x88 kqread sshd 27850 314064 21950 73 3 0x1100090 kqread syslogd 21950 150683 1 0 3 0x100082 sbwait syslogd 66204 465430 1 0 3 0x100080 kqread resolvd 10743 64934 51619 77 3 0x100092 kqread dhcpleased 70332 236167 51619 77 3 0x100092 kqread dhcpleased 51619 370831 1 0 3 0x80 kqread dhcpleased 24133 198117 0 0 3 0x14200 bored smr 52139 188647 0 0 2 0x14200 zerothread 65876 386534 0 0 3 0x14200 aiodoned aiodoned 24905 64134 0 0 3 0x14200 syncer update 74001 168920 0 0 3 0x14200 cleaner cleaner 35756 250675 0 0 3 0x14200 reaper reaper 99019 378331 0 0 3 0x14200 pgdaemon pagedaemon 21605 409199 0 0 3 0x14200 bored viomb 23688 417143 0 0 3 0x40014200 acpi0 acpi0 48767 455622 0 0 3 0x14200 bored softnet3 40673 164119 0 0 3 0x14200 bored softnet2 26045 384666 0 0 3 0x14200 bored softnet1 72908 358274 0 0 3 0x14200 bored softnet0 37219 179000 0 0 3 0x14200 bored systqmp 42003 193282 0 0 3 0x14200 bored systq 61929 409062 0 0 3 0x40014200 tmoslp softclock 58361 412419 0 0 3 0x40014200 idle0 1 378554 0 0 3 0x80082 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 10227 10105K 10280K 166960K 14704 0 pcb 17 15K 16K 166960K 486 0 rtable 227 11K 11K 166960K 3617 0 pf 37 14K 22K 166960K 338 0 ifaddr 42 9K 9K 166960K 474 0 ifgroup 54 2K 2K 166960K 536 0 sysctl 4 1K 2K 166960K 14 0 counters 31 17K 17K 166960K 155 0 ioctlops 0 0K 4K 166960K 468 0 iov 0 0K 18K 166960K 257 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1474 93K 93K 166960K 4755 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 50 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 181 0 dirhash 15 2K 3K 166960K 48 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 97K 166960K 4238 0 sigio 0 0K 0K 166960K 79 0 proc 59 67K 124K 166960K 3330 0 subproc 104 6K 7K 166960K 1329 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 469 0 in_multi 91 6K 7K 166960K 1202 0 ether_multi 1 0K 0K 166960K 31 0 mrt 1 0K 0K 166960K 8 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 2252 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 232 72K 106K 166960K 37794 0 UVM aobj 131 4K 4K 166960K 146 0 pinsyscall 38 76K 96K 166960K 7659 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 149 0 NDP 12 0K 2K 166960K 339 0 temp 75 6816K 6897K 166960K 176041 0 kqueue 13 20K 32K 166960K 475 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 120 571 0 568 3 0 3 3 0 8 2 rtentry 112 1272 0 1176 4 0 4 4 0 8 1 unpcb 144 2781 0 2766 9 3 6 6 0 8 5 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 4 0 4 2 1 1 1 0 8 1 tcpcb 808 1352 0 1345 11 3 8 8 0 8 7 arp 88 214 0 194 1 0 1 1 0 8 0 ipq 40 23 0 23 1 0 1 1 0 8 1 ipqe 40 287 0 287 1 0 1 1 0 8 1 inpcb 336 4379 0 4351 16 7 9 10 0 8 6 nd6 104 328 0 304 1 0 1 1 0 8 0 pkpcb 40 18 0 18 1 0 1 1 0 8 1 kcovpl 48 102 0 94 1 0 1 1 0 8 0 ppxss 1072 16 0 16 1 0 1 1 0 8 1 pfstscr 40 30 0 30 1 0 1 1 0 8 1 pfrktable 1344 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 13 0 7 1 0 1 1 0 8 0 pfstkey 128 114 0 102 1 0 1 1 0 8 0 pfstate 344 60 0 57 1 0 1 1 0 8 0 pfrule 1344 30 0 28 2 1 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 4793 0 4411 36 11 25 30 0 8 1 art_table 32 4795 0 4411 4 0 4 4 0 8 0 art_node 16 1198 0 1114 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 15 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 178 0 168 1 0 1 1 0 8 0 shmpl 112 143 0 15 4 0 4 4 0 8 0 dirhash 1024 41 0 22 3 0 3 3 0 8 0 dino2pl 256 6483 0 4807 105 0 105 105 0 8 0 ffsino 240 6483 0 4807 99 0 99 99 0 8 0 nchpl 144 10802 0 8985 68 0 68 68 0 8 0 uvmvnodes 80 7450 0 0 153 0 153 153 0 8 0 vnodes 216 7450 0 0 414 0 414 414 0 8 0 namei 1024 45220 0 45219 5 2 3 3 0 8 2 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 272 0 248 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 12 0 12 2 1 1 1 0 8 1 scxspl 216 69714 0 69714 10 2 8 8 1 8 8 plimitpl 152 1038 0 1022 1 0 1 1 0 8 0 sigapl 424 4355 0 4288 8 0 8 8 0 8 0 futexpl 64 41743 0 41733 1 0 1 1 0 8 0 knotepl 120 106599 0 106552 25 15 10 17 0 8 8 kqueuepl 184 918 0 908 3 0 3 3 0 8 2 pipepl 288 673 0 645 7 0 7 7 0 8 4 fdescpl 432 4315 0 4286 5 1 4 5 0 8 0 filepl 120 24504 0 24256 21 6 15 15 0 8 6 lockfpl 104 1101 0 1098 2 0 2 2 0 8 1 lockfspl 48 476 0 473 1 0 1 1 0 8 0 sessionpl 144 117 0 109 1 0 1 1 0 8 0 pgrppl 48 409 0 393 1 0 1 1 0 8 0 ucredpl 104 3320 0 3307 1 0 1 1 0 8 0 zombiepl 144 6541 0 6539 2 1 1 1 0 8 0 processpl 1096 4355 0 4288 7 1 6 6 0 8 0 procpl 648 9847 0 9766 9 1 8 8 0 8 0 sosppl 168 19 0 19 2 1 1 1 0 8 1 sockpl 504 7807 0 7761 83 70 13 25 0 8 7 mcl64k 65536 180 0 180 2 1 1 1 0 8 1 mcl16k 16384 30 0 30 1 0 1 1 0 8 1 mcl12k 12288 27 0 27 2 1 1 1 0 8 1 mcl9k 9216 13 0 13 1 0 1 1 0 8 1 mcl8k 8192 188 0 188 2 1 1 1 0 8 1 mcl4k 4096 146 0 146 2 1 1 1 0 8 1 mcl2k2 2112 4 0 4 1 0 1 1 0 8 1 mcl2k 2048 14854 0 14760 28 13 15 26 0 8 2 mtagpl 96 67 0 65 2 1 1 1 0 8 0 mbufpl 256 49911 0 49687 74 52 22 61 0 8 7 bufpl 280 13251 0 5802 533 0 533 533 0 8 0 anonpl 24 544565 0 541218 107 28 79 79 0 187 47 amapchunkpl 152 122346 0 121836 53 13 40 40 0 158 17 amappl16 200 8145 0 8128 29 21 8 15 0 8 6 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 357 0 347 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 6394 0 6366 3 1 2 3 0 8 0 amappl11 160 63 0 53 1 0 1 1 0 8 0 amappl10 152 11 0 11 1 1 0 1 0 8 0 amappl9 144 116 0 116 1 1 0 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 281 0 270 1 0 1 1 0 8 0 amappl6 120 1093 0 1091 1 0 1 1 0 8 0 amappl5 112 504 0 495 1 0 1 1 0 8 0 amappl4 104 569 0 551 1 0 1 1 0 8 0 amappl3 96 21818 0 21714 3 0 3 3 0 8 0 amappl2 88 4735 0 4661 2 0 2 2 0 8 0 amappl1 80 25394 0 24861 15 2 13 14 0 8 1 amappl 88 36577 0 36400 6 1 5 5 0 92 0 dma16384 16384 1 0 1 1 0 1 1 0 8 1 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 7 0 7 2 1 1 1 0 8 1 dma128 128 255 0 255 2 1 1 1 0 8 1 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 145 0 15 3 0 3 3 0 8 0 uaddrrnd 24 4315 0 4286 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4315 0 4286 1 0 1 1 0 8 0 vmmpekpl 168 35294 0 35235 4 0 4 4 0 8 0 vmmpepl 168 263563 0 261793 94 3 91 91 0 357 10 vmsppl 344 4314 0 4286 4 1 3 4 0 8 0 rwobjpl 24 77319 0 68859 52 0 52 52 0 8 0 pdppl 4096 8636 0 8572 295 229 66 82 0 8 2 pvpl 32 1971305 0 1961277 490 143 347 347 0 265 247 pmappl 216 4314 0 4286 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 779 0 393 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:437 panic(ffffffff82fb5305) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80618e46f0,ffff800037619460) at vgonel+0x681 sys/kern/vfs_subr.c:1200 vrecycle(fffffd80618e46f0,ffff800037619460) at vrecycle+0x7c sys/kern/vfs_subr.c:1126 ufs_inactive(ffff80002a56f148) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80618e46f0,ffff800037619460) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd80618e46f0) at vput+0xdc sys/kern/vfs_subr.c:779 VOP_REMOVE(fffffd806cbdf618,fffffd80618e46f0,ffff80002a56f2c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff800037619460,ffffff9c,71f742c46870,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff80002a56f440) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71f742c46d20, count: -11 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82fb5305) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80618e46f0,ffff800037619460) at vgonel+0x681 sys/kern/vfs_subr.c:1200 vrecycle(fffffd80618e46f0,ffff800037619460) at vrecycle+0x7c sys/kern/vfs_subr.c:1126 ufs_inactive(ffff80002a56f148) at ufs_inactive+0x35d sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80618e46f0,ffff800037619460) at VOP_INACTIVE+0xfe sys/kern/vfs_vops.c:495 vput(fffffd80618e46f0) at vput+0xdc sys/kern/vfs_subr.c:779 VOP_REMOVE(fffffd806cbdf618,fffffd80618e46f0,ffff80002a56f2c8) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff800037619460,ffffff9c,71f742c46870,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1888 syscall(ffff80002a56f440) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71f742c46d20, count: -11