panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *222187 49579 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8330cb25) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8068c26e68,ffff80002a7a4018) at vgonel+0x663 vrecycle(fffffd8068c26e68,ffff80002a7a4018) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a895430) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8068c26e68,ffff80002a7a4018) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd8068c26e68) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806f1eaa68,fffffd8068c26e68,ffff80002a895598) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7a4018,ffffff9c,795e62b55850,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a895700) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a895700) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x795e62b55d00, 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(ffffffff8330cb25) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8068c26e68,ffff80002a7a4018) at vgonel+0x663 vrecycle(fffffd8068c26e68,ffff80002a7a4018) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a895430) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8068c26e68,ffff80002a7a4018) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd8068c26e68) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806f1eaa68,fffffd8068c26e68,ffff80002a895598) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7a4018,ffffff9c,795e62b55850,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a895700) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a895700) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x795e62b55d00, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a895270 rbx 0xfffffd8068c26e68 rdx 0 rcx 0 rax 0xffff80002a7a4018 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4d8293195a3bd59d r11 0x163e7cf85defb614 r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff82f2ebe5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a895260 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=222187 pid=49579 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=0xffff80002a7a4548,0xffff80003c9e02d8 process=0xffff80003c9a56a0 user=0xffff80002a890000, vmspace=0xfffffd807052ee68 estcpu=36, cpticks=10, pctcpu=0.0, user=1, sys=9, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 46196 387699 14599 0 2 0 syz-executor 46196 14505 14599 0 3 0x4000080 fsleep syz-executor 22399 424330 78698 0 2 0 syz-executor 22399 387983 78698 0 3 0x4000080 fsleep syz-executor 89395 490602 46176 -1 2 0x10 syz-executor 89395 341654 46176 -1 3 0x4000090 fsleep syz-executor 6939 191424 24450 0 2 0 syz-executor 6939 5040 24450 0 2 0x4000000 syz-executor 6939 171928 24450 0 2 0x4000000 syz-executor 49527 266067 76800 0 2 0 syz-executor 49527 361754 76800 0 2 0x4000000 syz-executor 49527 2983 76800 0 2 0x4000000 syz-executor 13106 383348 52137 0 2 0 syz-executor 13106 187527 52137 0 3 0x4000080 fsleep syz-executor 13106 326456 52137 0 3 0x4000080 fsleep syz-executor 24450 190712 12708 0 3 0x82 nanoslp syz-executor 46176 140494 12708 0 3 0x82 nanoslp syz-executor 52137 247774 12708 0 3 0x82 nanoslp syz-executor *49579 222187 12708 0 7 0x2 syz-executor 16931 422468 1 0 3 0x100083 ttyin getty 24544 469949 12708 0 2 0x2 syz-executor 78698 359738 12708 0 3 0x82 nanoslp syz-executor 14599 407254 12708 0 3 0x82 nanoslp syz-executor 76800 295082 12708 0 3 0x82 nanoslp syz-executor 12708 86967 13934 0 3 0x82 kqread syz-executor 13934 54999 4670 0 3 0x10008a sigsusp ksh 4670 340263 41441 0 3 0x98 kqread sshd-session 41441 512865 1918 0 3 0x92 kqread sshd-session 1918 156813 1 0 3 0x88 kqread sshd 15050 457996 33356 73 3 0x1100090 kqread syslogd 33356 207399 1 0 3 0x100082 sbwait syslogd 76468 9454 1 0 3 0x100080 kqread resolvd 2547 436300 53709 77 3 0x100092 kqread dhcpleased 35634 386590 53709 77 3 0x100092 kqread dhcpleased 53709 155887 1 0 3 0x80 kqread dhcpleased 63616 519007 0 0 3 0x14200 bored smr 77162 325851 0 0 2 0x14200 zerothread 78479 480674 0 0 3 0x14200 aiodoned aiodoned 38620 439463 0 0 3 0x14200 syncer update 92475 505537 0 0 3 0x14200 cleaner cleaner 36793 20885 0 0 3 0x14200 reaper reaper 49198 413811 0 0 3 0x14200 pgdaemon pagedaemon 78013 227495 0 0 3 0x14200 bored viomb 11051 474644 0 0 3 0x40014200 acpi0 acpi0 85129 486372 0 0 3 0x14200 bored softnet0 89127 172128 0 0 3 0x14200 bored systqmp 40478 411542 0 0 3 0x14200 bored systq 94013 498061 0 0 3 0x40014200 tmoslp softclock 3828 151546 0 0 3 0x40014200 idle0 1 210429 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11074 12246K 13838K 166960K 17587 0 pcb 18 20K 24K 166960K 813 0 rtable 245 12K 13K 166960K 997 0 pf 32 13K 15K 166960K 250 0 ifaddr 39 7K 7K 166960K 175 0 ifgroup 54 2K 2K 166960K 314 0 sysctl 4 1K 9K 166960K 96 0 counters 34 17K 18K 166960K 161 0 ioctlops 0 0K 4K 166960K 612 0 iov 0 0K 24K 166960K 271 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1613 101K 102K 166960K 4670 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 227 0 dirhash 12 2K 3K 166960K 99 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 233K 166960K 2740 0 sigio 0 0K 0K 166960K 130 0 proc 60 59K 91K 166960K 967 0 subproc 72 4K 4K 166960K 135 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 470 0 in_multi 78 5K 7K 166960K 241 0 ether_multi 1 0K 0K 166960K 21 0 mrt 0 0K 0K 166960K 18 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 842 0 fusefs mount 1 32K 32K 166960K 1 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 228 152K 177K 166960K 26310 0 UVM aobj 140 25K 27K 166960K 152 0 pinsyscall 37 74K 93K 166960K 4056 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 149 0 NDP 12 0K 2K 166960K 132 0 temp 85 8668K 8800K 166960K 92767 0 kqueue 13 20K 34K 166960K 527 0 SYN cache 2 8K 16K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 342 0 339 3 2 1 3 0 8 0 rtentry 136 259 0 168 4 0 4 4 0 8 0 unpcb 144 2366 0 2351 13 7 6 6 0 8 5 syncache 336 22 0 22 3 2 1 1 0 8 1 tcpqe 32 12 0 12 3 2 1 1 0 8 1 tcpcb 736 1088 0 1083 28 21 7 10 0 8 6 arp 96 40 0 24 1 0 1 1 0 8 0 ipq 40 17 0 14 1 0 1 1 0 8 0 ipqe 40 85 0 82 1 0 1 1 0 8 0 inpcb 328 3181 0 3172 37 30 7 16 0 8 5 ip6q 72 44 0 42 1 0 1 1 0 8 0 ip6af 40 82 0 80 2 1 1 1 0 8 0 nd6 112 57 0 34 1 0 1 1 0 8 0 pkpcb 40 28 0 28 3 2 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 1072 98 0 98 2 1 1 1 0 8 1 pppxif 1384 9 0 9 2 1 1 1 0 8 1 pfrktable 1344 4 0 4 3 2 1 1 0 8 1 rttmr 136 3 0 3 2 2 0 1 0 8 0 art_heap8 4096 6 0 0 6 0 6 6 0 8 0 art_heap4 256 1070 0 649 36 9 27 31 0 8 0 art_table 40 1076 0 649 5 0 5 5 0 8 0 art_node 32 251 0 172 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 223 0 213 1 0 1 1 0 8 0 shmpl 112 135 0 7 4 0 4 4 0 8 0 dirhash 1024 75 0 58 3 0 3 3 0 8 0 dino2pl 256 6802 0 5295 95 0 95 95 0 8 0 ffsino 256 6802 0 5295 95 0 95 95 0 8 0 nchpl 144 10462 0 8753 64 0 64 64 0 8 0 rtmask 32 19 0 19 3 2 1 1 0 8 1 vnodes 216 5220 0 0 290 0 290 290 0 8 0 namei 1024 40578 0 40577 2 1 1 2 0 8 0 vcpupl 3904 9 0 0 2 0 2 2 0 8 0 vmpool 808 14 0 5 2 0 2 2 0 8 1 kstatmem 264 202 0 178 3 0 3 3 0 8 1 scsiplug 72 25 0 25 4 3 1 1 0 8 1 scxspl 216 36155 0 36155 10 8 2 8 1 8 2 plimitpl 152 753 0 737 1 0 1 1 0 8 0 sigapl 424 3038 0 2997 8 2 6 8 0 8 0 knotepl 120 155453 0 155406 36 25 11 15 0 8 8 kqueuepl 184 1186 0 1177 10 9 1 7 0 8 0 pipepl 304 500 0 471 5 2 3 5 0 8 0 fdescpl 448 2997 0 2969 5 1 4 5 0 8 0 filepl 120 23410 0 23198 17 6 11 14 0 8 1 lockfpl 104 1529 0 1527 2 1 1 2 0 8 0 lockfspl 48 525 0 523 1 0 1 1 0 8 0 sessionpl 144 46 0 38 1 0 1 1 0 8 0 pgrppl 48 155 0 139 1 0 1 1 0 8 0 ucredpl 104 4118 0 4105 1 0 1 1 0 8 0 zombiepl 144 3601 0 3601 1 0 1 1 0 8 1 processpl 1152 3038 0 2997 5 0 5 5 0 8 0 procpl 664 7093 0 7043 7 1 6 7 0 8 0 sosppl 176 16 0 16 3 2 1 1 0 8 1 sockpl 552 6006 0 5979 40 29 11 15 0 8 8 mcl64k 65536 321 0 321 2 0 2 2 0 8 2 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl9k 9216 68 0 68 3 2 1 1 0 8 1 mcl8k 8192 36 0 36 3 2 1 1 0 8 1 mcl4k 4096 6108 0 6054 17 8 9 14 0 8 1 mcl2k2 2112 2 0 2 1 1 0 1 0 8 0 mcl2k 2048 4455 0 4449 17 7 10 10 0 8 8 mtagpl 96 231 0 163 3 1 2 3 0 8 0 mbufpl 256 37209 0 37013 257 236 21 199 0 8 3 bufpl 280 10532 0 4311 445 0 445 445 0 8 0 anonpl 24 450941 0 445974 112 56 56 68 0 187 13 amapchunkpl 152 93883 0 93347 81 34 47 47 0 158 22 amappl16 200 8003 0 7933 46 29 17 17 0 8 8 amappl15 192 6 0 5 2 1 1 1 0 8 0 amappl14 184 11 0 11 2 2 0 1 0 8 0 amappl13 176 488 0 487 1 0 1 1 0 8 0 amappl12 168 3424 0 3387 2 0 2 2 0 8 0 amappl11 160 9 0 9 1 1 0 1 0 8 0 amappl10 152 45 0 34 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 112 0 110 1 0 1 1 0 8 0 amappl6 120 372 0 360 1 0 1 1 0 8 0 amappl5 112 81 0 73 1 0 1 1 0 8 0 amappl4 104 498 0 473 1 0 1 1 0 8 0 amappl3 96 18270 0 18169 4 0 4 4 0 8 0 amappl2 88 720 0 664 2 0 2 2 0 8 0 amappl1 80 23970 0 23429 13 0 13 13 0 8 0 amappl 88 24879 0 24719 6 1 5 5 0 92 0 uvmvnodes 80 169 0 0 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 268 0 268 4 3 1 1 0 8 1 dma64 64 7 0 7 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 72 151 0 12 3 0 3 3 0 8 0 uaddrrnd 24 2997 0 2969 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2997 0 2969 1 0 1 1 0 8 0 vmmpekpl 168 24662 0 24605 3 0 3 3 0 8 0 vmmpepl 168 194312 0 192519 109 18 91 97 0 357 4 vmsppl 368 2996 0 2969 4 1 3 4 0 8 0 rwobjpl 40 49927 0 48729 16 1 15 15 0 8 0 pdppl 4096 6028 0 5957 153 78 75 80 0 8 4 pvpl 32 1310377 0 1299856 231 96 135 163 0 265 33 pmappl 216 3010 0 2974 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 736 0 373 16 3 13 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(ffffffff8330cb25) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8068c26e68,ffff80002a7a4018) at vgonel+0x663 vrecycle(fffffd8068c26e68,ffff80002a7a4018) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a895430) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8068c26e68,ffff80002a7a4018) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd8068c26e68) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806f1eaa68,fffffd8068c26e68,ffff80002a895598) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7a4018,ffffff9c,795e62b55850,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a895700) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a895700) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x795e62b55d00, 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(ffffffff8330cb25) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd8068c26e68,ffff80002a7a4018) at vgonel+0x663 vrecycle(fffffd8068c26e68,ffff80002a7a4018) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a895430) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd8068c26e68,ffff80002a7a4018) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd8068c26e68) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806f1eaa68,fffffd8068c26e68,ffff80002a895598) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7a4018,ffffff9c,795e62b55850,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a895700) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a895700) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x795e62b55d00, count: -11