panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *236577 52767 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8330e3ed) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80696fd898,ffff80002a776a68) at vgonel+0x663 vrecycle(fffffd80696fd898,ffff80002a776a68) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a8e3570) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80696fd898,ffff80002a776a68) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd80696fd898) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c893a40,fffffd80696fd898,ffff80002a8e36d8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a776a68,ffffff9c,78a5adb7d8f0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8e3840) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8e3840) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78a5adb7dda0, 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(ffffffff8330e3ed) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80696fd898,ffff80002a776a68) at vgonel+0x663 vrecycle(fffffd80696fd898,ffff80002a776a68) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a8e3570) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80696fd898,ffff80002a776a68) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd80696fd898) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c893a40,fffffd80696fd898,ffff80002a8e36d8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a776a68,ffffff9c,78a5adb7d8f0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8e3840) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8e3840) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78a5adb7dda0, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a8e33b0 rbx 0xfffffd80696fd898 rdx 0 rcx 0 rax 0xffff80002a776a68 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd0fe732963311ac9 r11 0x29d86f1052d5a582 r12 0 r13 0x2909 __ALIGN_SIZE+0x1909 r14 0 r15 0x1 rip 0xffffffff824d60c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a8e33a0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=236577 pid=52767 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=0xffff80002a7762a0,0xffff80002a776018 process=0xffff80002a7dfa90 user=0xffff80002a8de000, vmspace=0xfffffd8079c07178 estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=5, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 8425 414660 21062 0 2 0 syz-executor 8425 398307 21062 0 3 0x4000080 fsleep syz-executor 98390 196135 47419 0 2 0 syz-executor 98390 488023 47419 0 3 0x4000080 fsleep syz-executor 29027 251988 55750 0 2 0 syz-executor 29027 435217 55750 0 3 0x4000080 fsleep syz-executor 2496 115320 33093 0 2 0 syz-executor 48226 125903 93277 0 2 0 syz-executor 48226 384702 93277 0 2 0x4000000 syz-executor 56674 220939 96603 0 2 0 syz-executor 56674 315757 96603 0 3 0x4000080 fsleep syz-executor 71133 91813 17481 0 2 0 syz-executor 71133 154446 17481 0 3 0x4000080 fsleep syz-executor *52767 236577 74659 0 7 0x2 syz-executor 33093 84534 74659 0 3 0x82 nanoslp syz-executor 55750 377253 74659 0 3 0x82 nanoslp syz-executor 96603 420548 74659 0 3 0x82 nanoslp syz-executor 47419 171157 74659 0 3 0x82 nanoslp syz-executor 93277 162626 74659 0 3 0x82 nanoslp syz-executor 21062 500397 74659 0 3 0x82 nanoslp syz-executor 17481 107235 74659 0 3 0x82 nanoslp syz-executor 74659 428452 34892 0 3 0x82 kqread syz-executor 34892 110340 83958 0 3 0x10008a sigsusp ksh 83958 314140 28430 0 3 0x98 kqread sshd-session 28430 428561 77302 0 3 0x92 kqread sshd-session 1555 353245 1 0 3 0x100083 ttyopn getty 77302 178363 1 0 3 0x88 kqread sshd 28724 2019 20133 73 3 0x1100090 kqread syslogd 20133 302513 1 0 3 0x100082 sbwait syslogd 50446 27553 1 0 3 0x100080 kqread resolvd 51441 485704 8068 77 3 0x100092 kqread dhcpleased 99634 376220 8068 77 3 0x100092 kqread dhcpleased 8068 398918 1 0 3 0x80 kqread dhcpleased 48534 214110 0 0 3 0x14200 bored smr 96977 38799 0 0 2 0x14200 zerothread 81175 85881 0 0 3 0x14200 aiodoned aiodoned 68651 172246 0 0 3 0x14200 syncer update 73071 273671 0 0 3 0x14200 cleaner cleaner 29955 7407 0 0 3 0x14200 reaper reaper 60553 327272 0 0 3 0x14200 pgdaemon pagedaemon 71025 306077 0 0 3 0x14200 bored viomb 74875 108848 0 0 3 0x40014200 acpi0 acpi0 97824 522277 0 0 3 0x14200 bored softnet0 77473 165856 0 0 3 0x14200 bored systqmp 60085 355839 0 0 3 0x14200 bored systq 42737 25844 0 0 3 0x40014200 tmoslp softclock 81391 464033 0 0 3 0x40014200 idle0 1 230499 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 11034 12113K 12319K 166960K 12509 0 pcb 17 12K 12K 166960K 64 0 rtable 249 7K 7K 166960K 388 0 pf 30 12K 13K 166960K 48 0 ifaddr 42 7K 7K 166960K 54 0 ifgroup 50 2K 2K 166960K 75 0 sysctl 3 1K 9K 166960K 8 0 counters 33 17K 18K 166960K 41 0 ioctlops 0 0K 4K 166960K 41 0 iov 0 0K 12K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1345 85K 85K 166960K 1478 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 74 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 287 0 sigio 0 0K 0K 166960K 1 0 proc 60 59K 91K 166960K 488 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 18 0 in_multi 99 7K 7K 166960K 105 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 377 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 214 150K 164K 166960K 4427 0 UVM aobj 6 4K 4K 166960K 6 0 pinsyscall 38 76K 98K 166960K 1365 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 11 0K 2K 166960K 34 0 temp 38 8663K 8730K 166960K 4564 0 kqueue 14 22K 33K 166960K 55 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 120 113 0 110 3 0 3 3 0 8 2 rtentry 136 116 0 4 4 0 4 4 0 8 0 unpcb 144 139 0 124 2 0 2 2 0 8 1 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 60 0 56 2 0 2 2 0 8 1 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 328 190 0 183 2 0 2 2 0 8 1 nd6 112 27 0 1 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 4 0 4 1 0 1 1 0 8 1 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 464 0 8 29 0 29 29 0 8 0 art_table 40 465 0 8 5 0 5 5 0 8 0 art_node 32 116 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 72 0 62 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1838 0 335 95 0 95 95 0 8 0 ffsino 256 1838 0 335 95 0 95 95 0 8 0 nchpl 144 2215 0 529 64 1 63 64 0 8 0 vnodes 216 1980 0 0 110 0 110 110 0 8 0 namei 1024 7028 0 7026 3 2 1 2 0 8 0 vcpupl 3904 1 0 0 1 0 1 1 0 8 0 vmpool 808 1 0 0 1 0 1 1 0 8 0 kstatmem 264 36 0 14 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 7356 0 7356 9 1 8 8 1 8 8 plimitpl 152 47 0 31 1 0 1 1 0 8 0 sigapl 424 576 0 534 6 1 5 6 0 8 0 knotepl 120 9519 0 9470 24 14 10 17 0 8 8 kqueuepl 184 63 0 53 1 0 1 1 0 8 0 pipepl 304 129 0 102 3 0 3 3 0 8 0 fdescpl 448 563 0 534 5 1 4 5 0 8 0 filepl 120 2507 0 2298 9 0 9 9 0 8 1 lockfpl 104 56 0 53 1 0 1 1 0 8 0 lockfspl 48 26 0 23 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 104 207 0 196 1 0 1 1 0 8 0 zombiepl 144 629 0 629 1 0 1 1 0 8 1 processpl 1152 576 0 534 4 0 4 4 0 8 0 procpl 664 856 0 808 6 0 6 6 0 8 1 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 552 488 0 463 8 0 8 8 0 8 6 mcl64k 65536 8 0 8 2 1 1 1 0 8 1 mcl8k 8192 5 0 5 2 1 1 1 0 8 1 mcl4k 4096 2649 0 2595 15 7 8 14 0 8 0 mcl2k 2048 274 0 272 3 0 3 3 0 8 2 mtagpl 96 13 0 5 1 0 1 1 0 8 0 mbufpl 256 5928 0 5747 18 1 17 17 0 8 2 bufpl 280 2600 0 118 178 0 178 178 0 8 0 anonpl 24 107820 0 104870 34 2 32 32 0 187 9 amapchunkpl 152 12998 0 12571 26 0 26 26 0 158 7 amappl16 200 1767 0 1740 5 3 2 5 0 8 0 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 9 0 9 1 1 0 1 0 8 0 amappl13 176 409 0 408 1 0 1 1 0 8 0 amappl12 168 923 0 885 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 39 0 29 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 20 0 18 1 0 1 1 0 8 0 amappl7 128 83 0 82 1 0 1 1 0 8 0 amappl6 120 262 0 251 1 0 1 1 0 8 0 amappl5 112 71 0 63 1 0 1 1 0 8 0 amappl4 104 390 0 366 1 0 1 1 0 8 0 amappl3 96 2133 0 2055 3 0 3 3 0 8 0 amappl2 88 682 0 612 2 0 2 2 0 8 0 amappl1 80 9334 0 8791 14 2 12 14 0 8 0 amappl 88 3705 0 3559 5 0 5 5 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 0 8 0 dma16384 16384 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 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 563 0 534 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 563 0 534 1 0 1 1 0 8 0 vmmpekpl 168 6265 0 6230 3 0 3 3 0 8 1 vmmpepl 168 43019 0 41267 83 1 82 82 0 357 2 vmsppl 368 562 0 534 4 1 3 4 0 8 0 rwobjpl 40 14515 0 13597 11 0 11 11 0 8 0 pdppl 4096 1135 0 1069 95 27 68 81 0 8 2 pvpl 32 262006 0 254102 99 1 98 98 0 265 23 pmappl 216 563 0 534 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 378 0 44 11 0 11 11 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(ffffffff8330e3ed) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80696fd898,ffff80002a776a68) at vgonel+0x663 vrecycle(fffffd80696fd898,ffff80002a776a68) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a8e3570) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80696fd898,ffff80002a776a68) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd80696fd898) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c893a40,fffffd80696fd898,ffff80002a8e36d8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a776a68,ffffff9c,78a5adb7d8f0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8e3840) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8e3840) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78a5adb7dda0, 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(ffffffff8330e3ed) at panic+0x1cf sys/kern/subr_prf.c:198 vgonel(fffffd80696fd898,ffff80002a776a68) at vgonel+0x663 vrecycle(fffffd80696fd898,ffff80002a776a68) at vrecycle+0x7c sys/kern/vfs_subr.c:1136 ufs_inactive(ffff80002a8e3570) at ufs_inactive+0x359 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd80696fd898,ffff80002a776a68) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffffd80696fd898) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffffd806c893a40,fffffd80696fd898,ffff80002a8e36d8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a776a68,ffffff9c,78a5adb7d8f0,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1904 syscall(ffff80002a8e3840) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8e3840) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78a5adb7dda0, count: -11