panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *486379 57321 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83418b05) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffff5006d40aa70,ffff80002a76c540) at vgonel+0x663 vrecycle(fffff5006d40aa70,ffff80002a76c540) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a7d2da0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffff5006d40aa70,ffff80002a76c540) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffff5006d40aa70) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffff5006d40b480,fffff5006d40aa70,ffff80002a7d2f08) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a76c540,ffffff9c,7c8aa1862bc0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1842 syscall(ffff80002a7d3070) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7d3070) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c8aa1863070, 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(ffffffff83418b05) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffff5006d40aa70,ffff80002a76c540) at vgonel+0x663 vrecycle(fffff5006d40aa70,ffff80002a76c540) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a7d2da0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffff5006d40aa70,ffff80002a76c540) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffff5006d40aa70) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffff5006d40b480,fffff5006d40aa70,ffff80002a7d2f08) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a76c540,ffffff9c,7c8aa1862bc0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1842 syscall(ffff80002a7d3070) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7d3070) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c8aa1863070, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a7d2be0 rbx 0xfffff5006d40aa70 rdx 0 rcx 0 rax 0xffff80002a76c540 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc1fecd945d96ef08 r11 0x62063b5b9fa33e3f r12 0 r13 0x4 r14 0 r15 0x1 rip 0xffffffff8169c655 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a7d2bd0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=486379 pid=57321 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=0xffff80002a76c2a8,0xffff80002a76dca8 process=0xffff80002a78c490 user=0xffff80002a7ce000, vmspace=0xfffff5007ec62cf0 estcpu=36, cpticks=5, pctcpu=0.0, user=1, sys=3, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 20342 2396 96913 0 2 0 syz-executor 20342 226442 96913 0 3 0x4000080 fsleep syz-executor 64345 304741 70817 0 2 0x2 ndp 70817 481502 39235 0 3 0x10008a sigsusp sh 39235 313908 91759 0 3 0x82 wait syz-executor 96913 289057 91759 0 3 0x82 nanoslp syz-executor 8286 311354 91759 0 3 0x82 wait syz-executor 97161 407174 91759 0 2 0x2 syz-executor 96014 230127 91759 0 2 0x2 syz-executor 76702 293557 91759 0 2 0x2 syz-executor 86818 175561 91759 0 2 0x2 syz-executor *57321 486379 91759 0 7 0x2 syz-executor 91759 38446 48097 0 3 0x82 kqread syz-executor 48097 176106 15323 0 3 0x10008a sigsusp ksh 15323 291016 42469 0 3 0x98 kqread sshd-session 42469 107415 34665 0 3 0x92 kqread sshd-session 7924 13485 1 0 3 0x100083 ttyin getty 34665 114275 1 0 3 0x88 kqread sshd 61766 433928 2001 73 3 0x1100090 kqread syslogd 2001 18849 1 0 3 0x100082 sbwait syslogd 34940 443988 1 0 3 0x100080 kqread resolvd 45319 314311 47912 77 3 0x100092 kqread dhcpleased 23701 441538 47912 77 3 0x100092 kqread dhcpleased 47912 258570 1 0 3 0x80 kqread dhcpleased 31736 332386 0 0 3 0x14200 bored smr 17736 113974 0 0 2 0x14200 zerothread 45121 397023 0 0 3 0x14200 aiodoned aiodoned 91587 285246 0 0 3 0x14200 syncer update 67137 177369 0 0 3 0x14200 cleaner cleaner 96450 60526 0 0 3 0x14200 reaper reaper 89217 169919 0 0 3 0x14200 pgdaemon pagedaemon 97014 51161 0 0 3 0x14200 bored viomb 80797 64534 0 0 3 0x40014200 acpi0 acpi0 97453 230960 0 0 3 0x14200 bored softnet0 88563 409912 0 0 3 0x14200 smrbar systqmp 8493 522645 0 0 3 0x14200 bored systq 48765 296911 0 0 3 0x40014200 tmoslp softclock 52977 50565 0 0 3 0x40014200 idle0 1 406827 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 11053 12372K 12533K 166960K 12505 0 pcb 17 12K 12K 166960K 63 0 rtable 245 10K 10K 166960K 549 0 pf 35 14K 17K 166960K 64 0 ifaddr 38 6K 7K 166960K 60 0 ifgroup 46 2K 2K 166960K 66 0 sysctl 3 1K 9K 166960K 10 0 counters 32 17K 18K 166960K 42 0 ioctlops 0 0K 4K 166960K 88 0 iov 0 0K 16K 166960K 14 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1366 86K 86K 166960K 1657 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 12 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 49K 93K 166960K 396 0 sigio 0 0K 0K 166960K 9 0 proc 61 59K 116K 166960K 566 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 24 0 in_multi 88 6K 7K 166960K 135 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 407 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 179 150K 166K 166960K 5136 0 UVM aobj 7 2K 2K 166960K 8 0 pinsyscall 35 70K 94K 166960K 1557 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 9 0 NDP 12 0K 2K 166960K 39 0 temp 42 9104K 9166K 166960K 9669 0 kqueue 13 20K 28K 166960K 61 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 56 0 53 1 0 1 1 0 8 0 rtentry 136 147 0 44 4 0 4 4 0 8 0 unpcb 144 256 0 241 6 5 1 6 0 8 0 syncache 336 8 0 8 1 1 0 1 0 8 0 tcpcb 736 126 0 122 7 6 1 7 0 8 0 arp 96 22 0 6 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 328 387 0 380 7 5 2 7 0 8 1 ip6q 72 3 0 3 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 112 36 0 14 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1072 7 0 7 1 0 1 1 0 8 1 pfstscr 40 7 0 3 1 0 1 1 0 8 0 pfrktable 1344 4 0 1 1 0 1 1 0 8 0 pfsrclim 320 2 0 2 1 1 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 3 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 3 1 0 1 1 0 8 0 pfstate 384 4 0 2 1 0 1 1 0 8 0 pfrule 1360 3 0 1 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 617 0 195 31 4 27 30 0 8 0 art_table 40 619 0 195 5 0 5 5 0 8 0 art_node 32 147 0 52 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semapl 72 10 0 1 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2001 0 544 92 0 92 92 0 8 0 ffsino 256 2001 0 544 92 0 92 92 0 8 0 nchpl 144 2513 0 824 64 0 64 64 0 8 0 vnodes 216 2297 0 0 128 0 128 128 0 8 0 namei 1024 8278 0 8277 3 1 2 2 0 8 1 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 35 0 14 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 8691 0 8691 8 7 1 8 1 8 1 plimitpl 152 209 0 193 1 0 1 1 0 8 0 sigapl 424 690 0 651 6 1 5 6 0 8 0 knotepl 120 12659 0 12612 10 8 2 10 0 8 0 kqueuepl 184 88 0 79 1 0 1 1 0 8 0 pipepl 304 175 0 147 5 2 3 5 0 8 0 fdescpl 448 677 0 651 5 1 4 5 0 8 0 filepl 120 3467 0 3258 14 5 9 13 0 8 1 lockfpl 104 243 0 241 2 0 2 2 0 8 1 lockfspl 48 52 0 50 1 0 1 1 0 8 0 sessionpl 144 96 0 88 1 0 1 1 0 8 0 pgrppl 48 107 0 91 1 0 1 1 0 8 0 ucredpl 104 442 0 430 1 0 1 1 0 8 0 zombiepl 144 681 0 680 1 0 1 1 0 8 0 processpl 1152 690 0 651 4 0 4 4 0 8 0 procpl 664 1064 0 1024 6 1 5 6 0 8 0 sockpl 552 708 0 683 16 12 4 16 0 8 2 mcl64k 65536 16 0 16 2 1 1 1 0 8 1 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 9 0 9 2 1 1 1 0 8 1 mcl4k 4096 2834 0 2780 14 6 8 14 0 8 0 mcl2k2 2112 2 0 2 1 1 0 1 0 8 0 mcl2k 2048 366 0 363 1 0 1 1 0 8 0 mtagpl 96 6 0 4 1 0 1 1 0 8 0 mbufpl 256 7071 0 6894 18 6 12 18 0 8 0 bufpl 272 2859 0 104 184 0 184 184 0 8 0 anonpl 24 111652 0 108788 51 19 32 45 0 186 5 amapchunkpl 152 16203 0 15886 48 18 30 38 0 158 10 amappl16 200 1377 0 1358 5 2 3 5 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 438 0 436 1 0 1 1 0 8 0 amappl13 176 117 0 107 1 0 1 1 0 8 0 amappl12 168 921 0 897 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 55 0 45 1 0 1 1 0 8 0 amappl9 144 273 0 272 1 0 1 1 0 8 0 amappl8 136 100 0 99 1 0 1 1 0 8 0 amappl7 128 163 0 150 1 0 1 1 0 8 0 amappl6 120 184 0 181 1 0 1 1 0 8 0 amappl5 112 93 0 86 1 0 1 1 0 8 0 amappl4 104 263 0 247 1 0 1 1 0 8 0 amappl3 96 3029 0 2955 5 1 4 4 0 8 0 amappl2 88 546 0 486 2 0 2 2 0 8 0 amappl1 80 11533 0 10976 13 1 12 13 0 8 0 amappl 88 4372 0 4257 5 0 5 5 0 92 0 uvmvnodes 80 104 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 677 0 651 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 677 0 651 1 0 1 1 0 8 0 vmmpekpl 168 7264 0 7224 3 0 3 3 0 8 0 vmmpepl 168 50680 0 49124 85 3 82 83 0 357 2 vmsppl 368 676 0 651 4 1 3 4 0 8 0 rwobjpl 40 16605 0 15678 11 0 11 11 0 8 0 pdppl 4096 1360 0 1302 96 28 68 80 0 8 10 pvpl 32 308714 0 301455 139 42 97 123 0 265 16 pmappl 216 676 0 651 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 562 0 59 16 0 16 16 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(ffffffff83418b05) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffff5006d40aa70,ffff80002a76c540) at vgonel+0x663 vrecycle(fffff5006d40aa70,ffff80002a76c540) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a7d2da0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffff5006d40aa70,ffff80002a76c540) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffff5006d40aa70) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffff5006d40b480,fffff5006d40aa70,ffff80002a7d2f08) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a76c540,ffffff9c,7c8aa1862bc0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1842 syscall(ffff80002a7d3070) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7d3070) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c8aa1863070, 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(ffffffff83418b05) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffff5006d40aa70,ffff80002a76c540) at vgonel+0x663 vrecycle(fffff5006d40aa70,ffff80002a76c540) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a7d2da0) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffff5006d40aa70,ffff80002a76c540) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffff5006d40aa70) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffff5006d40b480,fffff5006d40aa70,ffff80002a7d2f08) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a76c540,ffffff9c,7c8aa1862bc0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1842 syscall(ffff80002a7d3070) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7d3070) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c8aa1863070, count: -11