panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 280799 4180 0 0 0 0 syz-executor *337622 31958 0 0x2 0 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833407b5) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd807ccb1370,ffff8000ffffd760) at vgonel+0x663 vrecycle(fffffd807ccb1370,ffff8000ffffd760) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a2eab00) at ufs_inactive+0x35c sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd807ccb1370,ffff8000ffffd760) at VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498 vput(fffffd807ccb1370) at vput+0xe5 sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd807ca48888,fffffd807ccb1370,ffff80002a2eac68) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff8000ffffd760,ffffff9c,794db5b68440,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a2eade0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2eade0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x794db5b688f0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: missing alias ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833407b5) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd807ccb1370,ffff8000ffffd760) at vgonel+0x663 vrecycle(fffffd807ccb1370,ffff8000ffffd760) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a2eab00) at ufs_inactive+0x35c sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd807ccb1370,ffff8000ffffd760) at VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498 vput(fffffd807ccb1370) at vput+0xe5 sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd807ca48888,fffffd807ccb1370,ffff80002a2eac68) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff8000ffffd760,ffffff9c,794db5b68440,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a2eade0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2eade0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x794db5b688f0, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a2ea930 rbx 0xffff8000299dee07 rdx 0 rcx 0xffff8000ffffd760 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x90a87b97aa954602 r11 0xe47f25869482bea4 r12 0xffff8000299dec08 r13 0 r14 0 r15 0x1 rip 0xffffffff81fd1115 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a2ea920 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=337622 pid=31958 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=0xffff80002a2622a8,0xffff80002a260d20 process=0xffff8000ffff04e0 user=0xffff80002a2e5000, vmspace=0xfffffd806eb101f8 estcpu=36, cpticks=125, pctcpu=0.11, user=2, sys=114, intr=9 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4180 280799 10791 0 7 0 syz-executor 4180 331369 10791 0 2 0x4000080 syz-executor 86322 292508 80254 0 2 0 syz-executor 86322 59692 80254 0 2 0x4000080 syz-executor 43011 125711 21798 0 2 0 syz-executor 43011 257901 21798 0 2 0x4000000 syz-executor 89797 453376 85866 0 2 0 syz-executor 89797 416321 85866 0 3 0x4000080 kqread syz-executor 89797 434769 85866 0 2 0x4000000 syz-executor 3845 43136 132 0 2 0 syz-executor 3845 244659 132 0 3 0x4000080 lockf syz-executor 3845 13263 132 0 3 0x4000080 fsleep syz-executor 3845 336986 132 0 2 0x4000000 syz-executor 57391 521965 29586 0 2 0 syz-executor 57391 352244 29586 0 3 0x4000080 kqsel syz-executor 57391 77140 29586 0 2 0x4000000 syz-executor 8298 373809 54141 0 2 0 syz-executor 8298 500936 54141 0 3 0x4000080 fsleep syz-executor 8298 61677 54141 0 2 0x4000000 syz-executor 29586 396875 25709 0 2 0x3 syz-executor 80254 342648 25709 0 3 0x82 nanoslp syz-executor 51739 373037 1 0 3 0x100083 ttyin getty 98575 154889 0 0 3 0x14280 nfsidl nfsio 37805 371978 0 0 3 0x14280 nfsidl nfsio 56472 161714 0 0 3 0x14280 nfsidl nfsio 75803 137721 0 0 3 0x14280 nfsidl nfsio 69649 203904 0 0 3 0x14280 nfsidl nfsio 6188 272337 0 0 3 0x14280 nfsidl nfsio 72182 43594 0 0 3 0x14280 nfsidl nfsio 74451 234083 0 0 3 0x14280 nfsidl nfsio 35180 490015 0 0 3 0x14280 nfsidl nfsio 81138 490252 0 0 3 0x14280 nfsidl nfsio 96165 399112 0 0 3 0x14280 nfsidl nfsio 3416 473051 0 0 3 0x14280 nfsidl nfsio 79020 403584 0 0 3 0x14280 nfsidl nfsio 43253 501294 0 0 3 0x14280 nfsidl nfsio 12405 420326 0 0 3 0x14280 nfsidl nfsio 30671 23391 0 0 3 0x14280 nfsidl nfsio 51899 419357 0 0 3 0x14280 nfsidl nfsio 97369 97225 0 0 3 0x14280 nfsidl nfsio 86917 97999 0 0 3 0x14280 nfsidl nfsio 48723 156300 0 0 3 0x14280 nfsidl nfsio 21798 392622 25709 0 2 0x3 syz-executor 85866 133178 25709 0 3 0x82 nanoslp syz-executor 132 210903 25709 0 3 0x82 nanoslp syz-executor 10791 303409 25709 0 3 0x82 nanoslp syz-executor 54141 421350 25709 0 3 0x82 nanoslp syz-executor *31958 337622 25709 0 7 0x2 syz-executor 25709 313173 61891 0 3 0x82 kqread syz-executor 61891 39297 35706 0 3 0x10008a sigsusp ksh 35706 5945 4225 0 3 0x98 kqread sshd-session 4225 122469 26744 0 3 0x92 kqread sshd-session 26744 25952 1 0 3 0x88 kqread sshd 96136 301699 25072 74 3 0x1100092 bpf pflogd 25072 35159 1 0 3 0x80 sbwait pflogd 73283 391221 70984 73 3 0x1100090 kqread syslogd 70984 454672 1 0 3 0x100082 sbwait syslogd 44069 2674 1 0 3 0x100080 kqread resolvd 85883 256447 64931 77 3 0x100092 kqread dhcpleased 62123 457444 64931 77 3 0x100092 kqread dhcpleased 64931 4259 1 0 3 0x80 kqread dhcpleased 93298 32889 0 0 3 0x14200 bored smr 74118 58707 0 0 2 0x14200 zerothread 97381 432571 0 0 3 0x14200 aiodoned aiodoned 86232 61339 0 0 3 0x14200 syncer update 51195 63363 0 0 3 0x14200 cleaner cleaner 79977 121732 0 0 3 0x14200 reaper reaper 38592 350291 0 0 3 0x14200 pgdaemon pagedaemon 76941 18872 0 0 3 0x14200 bored viomb 48312 345722 0 0 3 0x40014200 acpi0 acpi0 64186 356791 0 0 3 0x40014200 idle1 21173 122638 0 0 3 0x14200 bored softnet1 78280 232916 0 0 3 0x14200 bored softnet0 79759 181530 0 0 3 0x14200 bored systqmp 1925 158345 0 0 3 0x14200 bored systq 98139 344617 0 0 3 0x14200 tmoslp softclockmp 46188 307042 0 0 3 0x40014200 tmoslp softclock 52272 497390 0 0 3 0x40014200 idle0 1 240482 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 89797 (syz-executor) thread 0xffff80002a261770 (434769) Process 31958 (syz-executor) thread 0xffff8000ffffd760 (337622) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11110 12196K 12410K 166960K 13623 0 pcb 17 16K 18K 166960K 816 0 rtable 210 13K 14K 166960K 876 0 pf 44 20K 83K 166960K 355 0 ifaddr 37 7K 9K 166960K 231 0 ifgroup 60 2K 3K 166960K 421 0 sysctl 4 1K 9K 166960K 29 0 counters 70 37K 39K 166960K 534 0 ioctlops 0 0K 8K 166960K 2378 0 iov 0 0K 28K 166960K 173 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1452 91K 92K 166960K 3142 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 6K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 142 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 2535 0 sigio 0 0K 0K 166960K 75 0 proc 72 115K 164K 166960K 933 0 subproc 72 4K 4K 166960K 138 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 431 0 in_multi 59 4K 7K 166960K 312 0 ether_multi 1 0K 0K 166960K 43 0 mrt 1 0K 0K 166960K 30 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 277 1235K 1235K 166960K 277 0 exec 0 0K 1K 166960K 962 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 6 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 238 151K 170K 166960K 25053 0 UVM aobj 52 16K 18K 166960K 56 0 pinsyscall 42 84K 101K 166960K 3819 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 336 0 NDP 12 0K 2K 166960K 164 0 temp 80 8684K 8796K 166960K 120571 0 kqueue 15 24K 32K 166960K 485 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 120 228 0 225 2 1 1 2 0 8 0 rtentry 176 270 0 201 6 1 5 6 0 8 0 unpcb 144 2107 0 2090 26 22 4 6 0 8 3 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 736 963 0 958 28 24 4 10 0 8 3 arp 136 44 0 33 1 0 1 1 0 8 0 inpcb 328 3488 0 3480 43 33 10 16 0 8 8 nd6 152 52 0 37 2 0 2 2 0 8 0 pkpcb 40 55 0 55 9 8 1 1 0 8 1 kcovpl 48 15 0 7 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 186 0 186 4 3 1 1 0 8 1 pppxif 1504 73 0 73 7 6 1 1 0 8 1 pfstscr 40 3 0 3 3 3 0 1 0 8 0 pffrag 232 26 0 15 1 0 1 1 0 482 0 pffrnode 88 22 0 13 1 0 1 1 0 8 0 pffrent 40 39 0 28 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 10 0 6 2 1 1 1 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pftag 88 3 0 1 2 1 1 1 0 8 0 pfstitem 24 7 0 1 1 0 1 1 0 8 0 pfstkey 128 16 0 10 3 2 1 1 0 8 0 pfstate 448 8 0 5 3 2 1 1 0 8 0 pfrule 1360 11 0 6 2 1 1 1 0 8 0 rttmr 136 5 0 5 4 3 1 1 0 8 1 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1208 0 905 39 17 22 31 0 8 0 art_table 40 1213 0 905 5 0 5 5 0 8 0 art_node 32 268 0 214 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 8 2 1 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 138 0 128 1 0 1 1 0 8 0 shmpl 112 42 0 0 2 0 2 2 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 6141 0 4636 96 0 96 96 0 8 0 ffsino 296 6141 0 4636 117 0 117 117 0 8 0 nchpl 144 9639 0 7921 65 0 65 65 0 8 0 rtmask 32 31 0 31 5 5 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 33963 0 33962 5 4 1 4 0 8 0 percpumem 16 282 0 232 1 0 1 1 0 8 0 vcpupl 3968 7 0 0 1 0 1 1 0 8 0 vmpool 848 10 0 3 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 266 0 236 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 6 0 6 3 3 0 1 0 8 0 scxspl 216 79985 0 79985 17 15 2 8 1 8 2 plimitpl 152 649 0 631 1 0 1 1 0 8 0 sigapl 424 2831 0 2764 9 1 8 8 0 8 0 knotepl 120 569 0 0 17 0 17 17 0 8 0 kqueuepl 224 964 0 949 10 9 1 5 0 8 0 pipepl 344 358 0 330 6 3 3 6 0 8 0 fdescpl 528 2788 0 2757 3 0 3 3 0 8 0 filepl 160 19817 0 19597 42 25 17 20 0 8 3 lockfpl 104 837 0 833 1 0 1 1 0 8 0 lockfspl 48 301 0 298 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 226 0 209 1 0 1 1 0 8 0 ucredpl 104 3063 0 3050 1 0 1 1 0 8 0 zombiepl 144 3822 0 3822 1 0 1 1 0 8 1 processpl 1232 2831 0 2764 7 1 6 6 0 8 0 procpl 664 6948 0 6869 8 0 8 8 0 8 0 sosppl 176 19 0 18 6 5 1 1 0 8 0 sockpl 752 6017 0 5989 95 81 14 27 0 8 10 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 38 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1817 0 0 113 0 113 113 0 8 0 bufpl 280 34456 0 28320 439 0 439 439 0 8 0 anonpl 32 11675 0 0 94 0 94 94 0 246 0 amapchunkpl 152 85225 0 84750 70 44 26 34 0 158 3 amappl16 200 11977 0 11942 67 53 14 27 0 8 2 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 511 0 510 1 0 1 1 0 8 0 amappl12 168 3194 0 3152 3 0 3 3 0 8 0 amappl11 160 6 0 5 2 1 1 1 0 8 0 amappl10 152 64 0 50 1 0 1 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 29 0 26 1 0 1 1 0 8 0 amappl7 128 111 0 109 1 0 1 1 0 8 0 amappl6 120 365 0 351 1 0 1 1 0 8 0 amappl5 112 75 0 64 1 0 1 1 0 8 0 amappl4 104 457 0 426 1 0 1 1 0 8 0 amappl3 96 15170 0 15079 5 2 3 4 0 8 0 amappl2 88 2880 0 2802 2 0 2 2 0 8 0 amappl1 80 19089 0 18492 14 1 13 14 0 8 0 amappl 88 23854 0 23693 5 0 5 5 0 92 0 uvmvnodes 80 196 0 0 4 0 4 4 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 dma2048 2048 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 128 255 0 255 3 3 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 55 0 4 1 0 1 1 0 8 0 uaddrrnd 24 2788 0 2757 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2788 0 2757 1 0 1 1 0 8 0 vmmpekpl 168 21206 0 21148 3 0 3 3 0 8 0 vmmpepl 168 180658 0 178720 134 36 98 107 0 357 3 vmsppl 488 2787 0 2757 6 1 5 5 0 8 0 rwobjpl 80 49742 0 48561 36 4 32 33 0 8 0 pdppl 4096 5604 0 5527 126 47 79 84 0 8 2 pvpl 32 19838 0 0 160 0 160 160 0 265 0 pmappl 256 2797 0 2760 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 454 0 102 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f7ff0) 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 end of kernel end trace frame: 0x73a41c634430, count: 12 ddb{0}> trace x86_ipi_db(ffffffff837f7ff0) 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 end of kernel end trace frame: 0x73a41c634430, count: -3 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833407b5) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd807ccb1370,ffff8000ffffd760) at vgonel+0x663 vrecycle(fffffd807ccb1370,ffff8000ffffd760) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a2eab00) at ufs_inactive+0x35c sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd807ccb1370,ffff8000ffffd760) at VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498 vput(fffffd807ccb1370) at vput+0xe5 sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd807ca48888,fffffd807ccb1370,ffff80002a2eac68) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff8000ffffd760,ffffff9c,794db5b68440,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a2eade0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2eade0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x794db5b688f0, count: 4 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833407b5) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd807ccb1370,ffff8000ffffd760) at vgonel+0x663 vrecycle(fffffd807ccb1370,ffff8000ffffd760) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a2eab00) at ufs_inactive+0x35c sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd807ccb1370,ffff8000ffffd760) at VOP_INACTIVE+0x104 sys/kern/vfs_vops.c:498 vput(fffffd807ccb1370) at vput+0xe5 sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd807ca48888,fffffd807ccb1370,ffff80002a2eac68) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff8000ffffd760,ffffff9c,794db5b68440,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a2eade0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2eade0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x794db5b688f0, count: -11