panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *485824 16894 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833f691a) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806d19c600,41ed,fffffd8007ffd2d8,ffff80002a83b9d8) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a83ba40) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806d0f36f8,ffff80002a83bba0,ffff80002a83bbd0,ffff80002a83bad0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a7462a0,ffffff9c,7cd50dda7a90,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 syscall(ffff80002a83bd40) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a83bd40) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cd50dda7b30, 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(ffffffff833f691a) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806d19c600,41ed,fffffd8007ffd2d8,ffff80002a83b9d8) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a83ba40) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806d0f36f8,ffff80002a83bba0,ffff80002a83bbd0,ffff80002a83bad0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a7462a0,ffffff9c,7cd50dda7a90,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 syscall(ffff80002a83bd40) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a83bd40) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cd50dda7b30, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a83b760 rbx 0x134c7 __ALIGN_SIZE+0x124c7 rdx 0 rcx 0 rax 0xffff80002a7462a0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6861334f3819da2e r11 0xf52b6cb92950a34 r12 0 r13 0xfffffd806ce56000 r14 0 r15 0x1 rip 0xffffffff81fbd7a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a83b750 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=485824 pid=16894 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a777a00,0xffff80002a747ca0 process=0xffff80002a7ac910 user=0xffff80002a836000, vmspace=0xfffffd80721bd5c8 estcpu=36, cpticks=4, pctcpu=0.0, user=3, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 72293 113222 22094 0 3 0x80 nanoslp syz-executor 72293 237921 22094 0 2 0x4000000 syz-executor 72293 395880 22094 0 3 0x4000080 fsleep syz-executor 15188 506649 95856 0 2 0x2 syz-executor 36554 12266 95856 0 2 0x2 syz-executor 22094 499009 95856 0 3 0x82 nanoslp syz-executor *16894 485824 95856 0 7 0x2 syz-executor 95856 493543 144 0 3 0x82 wait syz-executor 144 482430 50670 0 3 0x10008a sigsusp ksh 50670 298174 96429 0 3 0x98 kqread sshd-session 96429 225174 94442 0 3 0x92 kqread sshd-session 51102 33805 1 0 3 0x100083 ttyin getty 94442 430429 1 0 3 0x88 kqread sshd 61855 196205 88438 73 3 0x1100090 kqread syslogd 88438 159639 1 0 3 0x100082 sbwait syslogd 42904 166782 1 0 3 0x100080 kqread resolvd 99201 430585 11581 77 3 0x100092 kqread dhcpleased 930 268132 11581 77 3 0x100092 kqread dhcpleased 11581 135103 1 0 3 0x80 kqread dhcpleased 21425 377823 0 0 3 0x14200 bored smr 53603 252054 0 0 2 0x14200 zerothread 75438 209268 0 0 3 0x14200 aiodoned aiodoned 27968 491915 0 0 3 0x14200 syncer update 51453 27815 0 0 3 0x14200 cleaner cleaner 50244 337930 0 0 3 0x14200 reaper reaper 52800 93133 0 0 3 0x14200 pgdaemon pagedaemon 3576 5526 0 0 3 0x14200 bored viomb 8127 187894 0 0 3 0x40014200 acpi0 acpi0 9391 449567 0 0 3 0x14200 bored softnet0 83121 391564 0 0 3 0x14200 bored systqmp 72094 55896 0 0 3 0x14200 bored systq 56893 523132 0 0 3 0x40014200 tmoslp softclock 31163 76551 0 0 3 0x40014200 idle0 1 508782 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 11044 12233K 12443K 166960K 12443 0 pcb 17 12K 12K 166960K 92 0 rtable 234 9K 9K 166960K 391 0 pf 33 13K 16K 166960K 106 0 ifaddr 42 7K 7K 166960K 47 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 7 0 counters 33 17K 17K 166960K 33 0 ioctlops 0 0K 4K 166960K 96 0 iov 0 0K 0K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1295 81K 82K 166960K 1580 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 12 1K 1K 166960K 12 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 11 37K 97K 166960K 438 0 proc 59 59K 100K 166960K 535 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 81 0 in_multi 99 7K 7K 166960K 114 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 2K 166960K 376 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 173 157K 176K 166960K 5641 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 32 64K 94K 166960K 1549 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 11 0K 2K 166960K 27 0 temp 34 9064K 9128K 166960K 5239 0 kqueue 13 20K 27K 166960K 94 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 61 0 57 1 0 1 1 0 8 0 rtentry 136 118 0 16 4 0 4 4 0 8 0 unpcb 144 96 0 81 1 0 1 1 0 8 0 syncache 336 16 0 16 3 3 0 1 0 8 0 tcpcb 736 126 0 122 3 2 1 2 0 8 0 arp 96 18 0 0 1 0 1 1 0 8 0 inpcb 328 316 0 309 4 2 2 2 0 8 1 ip6q 72 7 0 1 1 0 1 1 0 8 0 ip6af 40 8 0 2 1 0 1 1 0 8 0 nd6 112 26 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pfrktable 1344 11 0 5 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfrule 1360 29 0 9 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 542 0 96 33 3 30 33 0 8 0 art_table 40 543 0 96 6 0 6 6 0 8 0 art_node 32 118 0 26 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1988 0 534 92 0 92 92 0 8 0 ffsino 256 1989 0 534 92 0 92 92 0 8 0 nchpl 144 2601 0 916 63 0 63 63 0 8 0 vnodes 216 2228 0 0 124 0 124 124 0 8 0 namei 1024 7461 0 7459 4 3 1 2 0 8 0 pfiaddrpl 120 32 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scsiplug 72 12 0 12 4 3 1 1 0 8 1 scxspl 216 8823 0 8823 3 2 1 3 1 8 1 plimitpl 152 58 0 42 1 0 1 1 0 8 0 sigapl 424 734 0 698 6 1 5 6 0 8 0 knotepl 120 13015 0 12968 9 0 9 9 0 8 7 kqueuepl 184 78 0 69 1 0 1 1 0 8 0 pipepl 304 133 0 106 3 0 3 3 0 8 0 fdescpl 448 721 0 698 5 1 4 5 0 8 0 filepl 120 2782 0 2576 8 0 8 8 0 8 1 lockfpl 104 111 0 109 1 0 1 1 0 8 0 lockfspl 48 55 0 53 1 0 1 1 0 8 0 sessionpl 144 27 0 19 1 0 1 1 0 8 0 pgrppl 48 59 0 43 1 0 1 1 0 8 0 ucredpl 104 311 0 300 1 0 1 1 0 8 0 zombiepl 144 733 0 729 4 3 1 1 0 8 0 processpl 1152 734 0 698 4 0 4 4 0 8 0 procpl 664 1092 0 1054 6 0 6 6 0 8 1 sockpl 552 476 0 450 4 1 3 3 0 8 0 mcl64k 65536 28 0 28 4 3 1 1 0 8 1 mcl16k 16384 11 0 11 2 1 1 1 0 8 1 mcl12k 12288 1 0 1 1 1 0 1 0 8 0 mcl9k 9216 3 0 3 1 1 0 1 0 8 0 mcl8k 8192 45 0 45 5 4 1 1 0 8 1 mcl4k 4096 3091 0 3038 13 5 8 13 0 8 0 mcl2k 2048 404 0 398 6 4 2 2 0 8 1 mtagpl 96 19 0 13 1 0 1 1 0 8 0 mbufpl 256 7322 0 7206 11 0 11 11 0 8 0 bufpl 280 3169 0 103 219 0 219 219 0 8 0 anonpl 24 129436 0 126758 39 7 32 32 0 187 5 amapchunkpl 152 17183 0 16889 32 8 24 25 0 158 7 amappl16 200 2148 0 2127 5 1 4 5 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 408 0 407 1 0 1 1 0 8 0 amappl13 176 122 0 112 1 0 1 1 0 8 0 amappl12 168 960 0 938 2 0 2 2 0 8 0 amappl11 160 9 0 9 1 1 0 1 0 8 0 amappl10 152 59 0 48 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 98 0 97 1 0 1 1 0 8 0 amappl7 128 145 0 134 1 0 1 1 0 8 0 amappl6 120 154 0 153 1 0 1 1 0 8 0 amappl5 112 105 0 98 1 0 1 1 0 8 0 amappl4 104 271 0 257 1 0 1 1 0 8 0 amappl3 96 3334 0 3267 3 0 3 3 0 8 0 amappl2 88 553 0 501 2 0 2 2 0 8 0 amappl1 80 11589 0 11060 15 1 14 15 0 8 0 amappl 88 4913 0 4803 4 0 4 4 0 92 0 uvmvnodes 80 102 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 721 0 698 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 721 0 698 1 0 1 1 0 8 0 vmmpekpl 168 7508 0 7466 2 0 2 2 0 8 0 vmmpepl 168 54078 0 52643 94 14 80 93 0 357 3 vmsppl 368 720 0 698 4 1 3 4 0 8 0 rwobjpl 40 17709 0 16830 12 0 12 12 0 8 0 pdppl 4096 1448 0 1396 104 38 66 82 0 8 14 pvpl 32 338287 0 331325 120 30 90 104 0 265 7 pmappl 216 720 0 698 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 390 0 70 10 0 10 10 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(ffffffff833f691a) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806d19c600,41ed,fffffd8007ffd2d8,ffff80002a83b9d8) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a83ba40) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806d0f36f8,ffff80002a83bba0,ffff80002a83bbd0,ffff80002a83bad0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a7462a0,ffffff9c,7cd50dda7a90,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 syscall(ffff80002a83bd40) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a83bd40) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cd50dda7b30, 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(ffffffff833f691a) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806d19c600,41ed,fffffd8007ffd2d8,ffff80002a83b9d8) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a83ba40) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806d0f36f8,ffff80002a83bba0,ffff80002a83bbd0,ffff80002a83bad0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a7462a0,ffffff9c,7cd50dda7a90,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 syscall(ffff80002a83bd40) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a83bd40) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cd50dda7b30, count: -8