panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *509158 68713 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83466ca9) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffb806d29f200,41ed,fffffb8007ffd548,ffff80002a8a3548) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a8a35b0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffb806d18e8b0,ffff80002a8a3710,ffff80002a8a3740,ffff80002a8a3640) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a736f98,ffffff9c,76c0ef253400,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80002a8a38b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a38b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76c0ef2534a0, count: 7 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: ffs_valloc: dup alloc ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83466ca9) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffb806d29f200,41ed,fffffb8007ffd548,ffff80002a8a3548) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a8a35b0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffb806d18e8b0,ffff80002a8a3710,ffff80002a8a3740,ffff80002a8a3640) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a736f98,ffffff9c,76c0ef253400,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80002a8a38b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a38b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76c0ef2534a0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a8a32d0 rbx 0x665a __ALIGN_SIZE+0x565a rdx 0 rcx 0 rax 0xffff80002a736f98 r8 0x101010101010101 r9 0x8080808080808080 r10 0x7d5277e2d09119e8 r11 0x9faddb37d8ee986a r12 0 r13 0xfffffb807479da00 r14 0 r15 0x1 rip 0xffffffff825c7385 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a8a32c0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=509158 pid=68713 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7362a0,0xffff80002f0b0a88 process=0xffff80002a79fa90 user=0xffff80002a89e000, vmspace=0xfffffb8073daa178 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 48868 223292 55218 0 2 0 syz-executor 78379 90246 7953 0 2 0 syz-executor 78379 164452 7953 0 3 0x4000080 fsleep syz-executor 30254 75647 98936 0 2 0 syz-executor 30254 306855 98936 0 2 0x4000000 syz-executor 58150 217873 65972 0 2 0 syz-executor 58150 464986 65972 0 2 0x4000000 syz-executor 58150 25619 65972 0 3 0x4000080 fsleep syz-executor 58150 334651 65972 0 3 0x4000080 fsleep syz-executor 23152 74 93987 0 2 0 syz-executor 23152 135806 93987 0 3 0x4000080 fsleep syz-executor 90848 161369 87368 0 2 0x2 ifconfig 87368 324334 45394 0 3 0x10008a sigsusp sh *68713 509158 87996 0 7 0x2 syz-executor 7953 479705 87996 0 3 0x82 nanoslp syz-executor 98936 334953 87996 0 3 0x82 nanoslp syz-executor 55218 498499 87996 0 2 0x2 syz-executor 45394 408357 87996 0 3 0x82 wait syz-executor 93987 301211 87996 0 3 0x82 nanoslp syz-executor 65972 501919 87996 0 3 0x82 nanoslp syz-executor 87996 397133 94612 0 3 0x82 wait syz-executor 94612 396038 83257 0 3 0x10008a sigsusp ksh 83257 119710 1668 0 3 0x98 kqread sshd-session 1668 129306 66558 0 3 0x92 kqread sshd-session 14787 245223 1 0 3 0x100083 ttyin getty 66558 254519 1 0 3 0x88 kqread sshd 95345 47926 95336 73 3 0x1100090 kqread syslogd 95336 285523 1 0 3 0x100082 sbwait syslogd 55829 270685 1 0 3 0x100080 kqread resolvd 72432 184912 68663 77 3 0x100092 kqread dhcpleased 95123 289033 68663 77 3 0x100092 kqread dhcpleased 68663 39983 1 0 3 0x80 kqread dhcpleased 52085 17072 0 0 3 0x14200 bored smr 51469 484411 0 0 2 0x14200 zerothread 87674 102951 0 0 3 0x14200 aiodoned aiodoned 51803 186058 0 0 3 0x14200 syncer update 350 209282 0 0 3 0x14200 cleaner cleaner 43536 80084 0 0 3 0x14200 reaper reaper 48489 354771 0 0 3 0x14200 pgdaemon pagedaemon 11496 333828 0 0 3 0x14200 bored viomb 47970 119812 0 0 3 0x40014200 acpi0 acpi0 9489 396631 0 0 3 0x14200 bored softnet0 64398 326301 0 0 3 0x14200 smrbar systqmp 74077 432799 0 0 3 0x14200 bored systq 39120 330157 0 0 3 0x40014200 tmoslp softclock 35223 44456 0 0 3 0x40014200 idle0 1 414655 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 11027 12166K 12168K 166960K 12120 0 pcb 17 12K 12K 166960K 17 0 rtable 215 5K 6K 166960K 325 0 pf 30 12K 12K 166960K 30 0 ifaddr 39 6K 6K 166960K 41 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 33 17K 17K 166960K 33 0 ioctlops 0 0K 2K 166960K 29 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1288 81K 81K 166960K 1355 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 61K 93K 166960K 132 0 proc 59 67K 83K 166960K 476 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 1 0 in_multi 88 6K 6K 166960K 88 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 360 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 194 143K 150K 166960K 2891 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 38 76K 93K 166960K 1224 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 25 1K 1K 166960K 25 0 temp 34 9108K 9112K 166960K 3760 0 kqueue 13 20K 20K 166960K 25 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 35 0 32 1 0 1 1 0 8 0 rtentry 136 100 0 1 4 0 4 4 0 8 0 unpcb 144 39 0 24 1 0 1 1 0 8 0 syncache 336 5 0 4 1 0 1 1 0 8 0 tcpcb 736 11 0 4 1 0 1 1 0 8 0 arp 96 16 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 328 125 0 50 7 0 7 7 0 8 0 nd6 112 21 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 408 0 0 26 0 26 26 0 8 0 art_table 40 409 0 0 5 0 5 5 0 8 0 art_node 32 100 0 9 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1563 0 103 92 0 92 92 0 8 0 ffsino 256 1564 0 104 92 0 92 92 0 8 0 nchpl 144 1765 0 74 64 0 64 64 0 8 0 vnodes 216 1646 0 0 92 0 92 92 0 8 0 namei 1024 5332 0 5331 2 0 2 2 0 8 1 kstatmem 264 23 0 0 2 0 2 2 0 8 0 scxspl 216 5963 0 5963 4 0 4 4 1 8 4 plimitpl 152 30 0 14 1 0 1 1 0 8 0 sigapl 424 430 0 388 6 0 6 6 0 8 0 knotepl 120 1963 0 1916 2 0 2 2 0 8 0 kqueuepl 184 21 0 12 1 0 1 1 0 8 0 pipepl 304 123 0 96 3 0 3 3 0 8 0 fdescpl 448 417 0 388 5 0 5 5 0 8 0 filepl 120 1603 0 1267 11 0 11 11 0 8 0 lockfpl 104 10 0 8 1 0 1 1 0 8 0 lockfspl 48 6 0 4 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 104 81 0 70 1 0 1 1 0 8 0 zombiepl 144 389 0 388 1 0 1 1 0 8 0 processpl 1152 430 0 388 4 0 4 4 0 8 0 procpl 664 441 0 393 5 0 5 5 0 8 0 sockpl 552 199 0 106 7 0 7 7 0 8 0 mcl64k 65536 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 2507 0 2450 15 0 15 15 0 8 7 mcl2k 2048 105 0 105 1 0 1 1 0 8 1 mtagpl 96 5 0 5 1 0 1 1 0 8 1 mbufpl 256 4114 0 3997 9 0 9 9 0 8 1 bufpl 272 2246 0 102 143 0 143 143 0 8 0 anonpl 24 95689 0 92792 22 0 22 22 0 187 3 amapchunkpl 152 7915 0 7525 18 0 18 18 0 158 1 amappl16 200 1889 0 1874 5 0 5 5 0 8 4 amappl15 192 6 0 6 1 0 1 1 0 8 1 amappl14 184 404 0 402 1 0 1 1 0 8 0 amappl13 176 116 0 105 1 0 1 1 0 8 0 amappl12 168 689 0 663 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 0 1 1 0 8 1 amappl10 152 114 0 104 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 0 1 1 0 8 1 amappl8 136 93 0 91 1 0 1 1 0 8 0 amappl7 128 140 0 129 1 0 1 1 0 8 0 amappl6 120 143 0 140 1 0 1 1 0 8 0 amappl5 112 143 0 135 1 0 1 1 0 8 0 amappl4 104 259 0 244 1 0 1 1 0 8 0 amappl3 96 1377 0 1287 3 0 3 3 0 8 0 amappl2 88 524 0 474 2 0 2 2 0 8 0 amappl1 80 10126 0 9585 13 0 13 13 0 8 1 amappl 88 2213 0 2081 4 0 4 4 0 92 0 uvmvnodes 80 97 0 0 2 0 2 2 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 417 0 388 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 417 0 388 1 0 1 1 0 8 0 vmmpekpl 168 5391 0 5358 2 0 2 2 0 8 0 vmmpepl 168 36621 0 34962 79 0 79 79 0 357 1 vmsppl 368 416 0 388 4 0 4 4 0 8 1 rwobjpl 40 14132 0 13228 11 0 11 11 0 8 1 pdppl 4096 840 0 776 94 14 80 80 0 8 16 pvpl 32 215049 0 207472 69 0 69 69 0 265 2 pmappl 216 416 0 388 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 494 0 14 14 0 14 14 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(ffffffff83466ca9) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffb806d29f200,41ed,fffffb8007ffd548,ffff80002a8a3548) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a8a35b0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffb806d18e8b0,ffff80002a8a3710,ffff80002a8a3740,ffff80002a8a3640) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a736f98,ffffff9c,76c0ef253400,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80002a8a38b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a38b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76c0ef2534a0, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83466ca9) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffb806d29f200,41ed,fffffb8007ffd548,ffff80002a8a3548) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a8a35b0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffb806d18e8b0,ffff80002a8a3710,ffff80002a8a3740,ffff80002a8a3640) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a736f98,ffffff9c,76c0ef253400,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80002a8a38b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a38b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76c0ef2534a0, count: -8