panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 14179 34935 0 0x2 0 0K syz-executor 446388 83634 0 0x2 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349b02e) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806f677cf0,41c0,fffffd80097fd410,ffff800038facf08) at ffs_inode_alloc+0x94e ufs_mkdir(ffff800038facf70) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd8076aa6468,ffff800038fad0d0,ffff800038fad100,ffff800038fad000) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff800038fa4fb8,ffffff9c,74ba0b287b40,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff800038fad280) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800038fad280) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ba0b287b00, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: ffs_valloc: dup alloc ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349b02e) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806f677cf0,41c0,fffffd80097fd410,ffff800038facf08) at ffs_inode_alloc+0x94e ufs_mkdir(ffff800038facf70) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd8076aa6468,ffff800038fad0d0,ffff800038fad100,ffff800038fad000) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff800038fa4fb8,ffffff9c,74ba0b287b40,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff800038fad280) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800038fad280) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ba0b287b00, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800038facc80 rbx 0xffffffff83985e07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff800038fa4fb8 rax 0xffffffff83984ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6326e7087cc28745 r11 0x419913ef5172a9e r12 0xffffffff83985c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff82079915 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800038facc70 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=14179 pid=34935 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800038faefc0,0xffff800038fa5260 process=0xffff8000fffe7048 user=0xffff800038fa8000, vmspace=0xfffffd800b0635b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 31066 511004 83634 0 2 0 syz-executor 63798 237927 97282 0 2 0 syz-executor *34935 14179 83634 0 7 0x2 syz-executor 71471 454374 0 0 3 0x14280 nfsidl nfsio 18812 215829 0 0 3 0x14280 nfsidl nfsio 80525 184074 0 0 3 0x14280 nfsidl nfsio 50327 39266 0 0 3 0x14280 nfsidl nfsio 90649 174529 0 0 3 0x14280 nfsidl nfsio 14785 473175 0 0 3 0x14280 nfsidl nfsio 60849 39504 0 0 3 0x14280 nfsidl nfsio 15375 15826 0 0 3 0x14280 nfsidl nfsio 9452 43787 0 0 3 0x14280 nfsidl nfsio 52846 380454 0 0 3 0x14280 nfsidl nfsio 49038 36201 0 0 3 0x14280 nfsidl nfsio 1408 329716 0 0 3 0x14280 nfsidl nfsio 7270 147925 0 0 3 0x14280 nfsidl nfsio 6935 257284 0 0 3 0x14280 nfsidl nfsio 51882 190126 0 0 3 0x14280 nfsidl nfsio 62230 145068 0 0 3 0x14280 nfsidl nfsio 62306 149382 0 0 3 0x14280 nfsidl nfsio 23858 101896 0 0 3 0x14280 nfsidl nfsio 39584 62005 0 0 3 0x14280 nfsidl nfsio 87826 256547 0 0 3 0x14280 nfsidl nfsio 14951 107687 0 0 3 0x14200 acct acct 77356 244616 83634 0 2 0x82 syz-executor 97282 24004 83634 0 3 0x82 nanoslp syz-executor 83634 446388 20800 0 7 0x2 syz-executor 20800 327456 36199 0 3 0x10008a sigsusp ksh 36199 409399 63135 0 3 0x98 kqread sshd-session 63135 484509 29190 0 3 0x92 kqread sshd-session 39657 152961 1 0 3 0x100083 ttyin getty 29190 322296 1 0 3 0x88 kqread sshd 54659 56522 97011 74 3 0x1100092 bpf pflogd 97011 304975 1 0 3 0x80 sbwait pflogd 2467 158188 9819 73 3 0x1100090 kqread syslogd 9819 357308 1 0 3 0x100082 sbwait syslogd 50539 102943 1 0 3 0x100080 kqread resolvd 2235 249810 26990 77 3 0x100092 kqread dhcpleased 70255 244468 26990 77 3 0x100092 kqread dhcpleased 26990 519008 1 0 3 0x80 kqread dhcpleased 25720 346308 0 0 3 0x14200 bored smr 42060 18419 0 0 3 0x14200 pgzero zerothread 42714 382690 0 0 3 0x14200 aiodoned aiodoned 11276 447536 0 0 3 0x14200 syncer update 44817 453020 0 0 3 0x14200 cleaner cleaner 60516 19620 0 0 3 0x14200 reaper reaper 13391 142831 0 0 3 0x14200 pgdaemon pagedaemon 1823 88703 0 0 3 0x14200 bored viomb 33318 378369 0 0 3 0x40014200 acpi0 acpi0 62353 319101 0 0 3 0x40014200 idle1 88426 262653 0 0 3 0x14200 bored softnet1 23576 452153 0 0 2 0x14200 softnet0 40402 146468 0 0 3 0x14200 smrbar systqmp 29957 367707 0 0 3 0x14200 bored systq 15230 143725 0 0 3 0x14200 tmoslp softclockmp 99382 486616 0 0 3 0x40014200 tmoslp softclock 76823 177006 0 0 3 0x40014200 idle0 1 434725 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 34935 (syz-executor) thread 0xffff800038fa4fb8 (14179) exclusive rrwlock inode r = 0 (0xfffffd8062c190c8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806f677d90) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3134 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a9f740) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 Process 40402 (systqmp) thread 0xffff8000ffffe298 (146468) shared rwlock systqmp r = 0 (0xffffffff8394e988) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11056 12081K 12290K 166960K 12260 0 pcb 17 12K 12K 166960K 32 0 rtable 185 5K 7K 166960K 396 0 pf 32 17K 24K 166960K 65 0 ifaddr 34 5K 7K 166960K 46 0 ifgroup 47 2K 2K 166960K 57 0 sysctl 1 1K 9K 166960K 5 0 counters 66 36K 37K 166960K 72 0 ioctlops 0 0K 4K 166960K 1542 0 iov 0 0K 12K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1295 81K 82K 166960K 1464 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 1692 195K 286K 166960K 12470 0 file desc 11 31K 93K 166960K 251 0 sigio 0 0K 0K 166960K 3 0 proc 71 115K 164K 166960K 571 0 subproc 54 3K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 9 0 in_multi 74 5K 7K 166960K 102 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 13 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 400 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 169 157K 183K 166960K 4151 0 UVM aobj 5 2K 4K 166960K 6 0 pinsyscall 36 72K 108K 166960K 1439 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 10 0K 2K 166960K 29 0 temp 29 9114K 9178K 166960K 4773 0 kqueue 13 20K 30K 166960K 48 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 43 0 40 1 0 1 1 0 8 0 rtentry 176 119 0 39 6 0 6 6 0 8 0 unpcb 144 78 0 61 1 0 1 1 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpcb 736 31 0 27 1 0 1 1 0 8 0 arp 136 19 0 5 1 0 1 1 0 8 0 inpcb 328 122 0 115 2 0 2 2 0 8 1 nd6 152 25 0 6 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 9 0 3 1 0 1 1 0 8 0 ppxss 1192 1 0 1 1 0 1 1 0 8 1 pfstscr 40 8 0 8 1 0 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pfstitem 24 25 0 2 1 0 1 1 0 8 0 pfstkey 128 31 0 8 1 0 1 1 0 8 0 pfstate 448 29 0 6 3 0 3 3 0 8 0 pfrule 1360 21 0 15 2 0 2 2 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 524 0 149 30 0 30 30 0 8 2 art_table 40 526 0 149 5 0 5 5 0 8 0 art_node 32 119 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 shmpl 112 3 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1768 0 301 93 0 93 93 0 8 0 ffsino 296 1769 0 302 114 0 114 114 0 8 0 nchpl 144 2129 0 427 64 0 64 64 0 8 0 vnodes 216 1922 0 0 107 0 107 107 0 8 0 namei 1024 6916 0 6915 2 0 2 2 0 8 1 percpumem 16 51 0 3 1 0 1 1 0 8 0 kstatmem 264 29 0 6 2 0 2 2 0 8 0 scxspl 216 7218 0 7218 4 3 1 3 1 8 1 plimitpl 152 46 0 30 1 0 1 1 0 8 0 sigapl 424 596 0 534 8 0 8 8 0 8 0 knotepl 120 566 0 0 18 0 18 18 0 8 0 kqueuepl 224 49 0 40 1 0 1 1 0 8 0 pipepl 344 146 0 116 3 0 3 3 0 8 0 fdescpl 528 559 0 534 3 0 3 3 0 8 1 filepl 160 2369 0 2182 13 0 13 13 0 8 4 lockfpl 104 47 0 45 1 0 1 1 0 8 0 lockfspl 48 22 0 20 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 41 0 25 1 0 1 1 0 8 0 ucredpl 104 207 0 194 1 0 1 1 0 8 0 zombiepl 144 538 0 534 1 0 1 1 0 8 0 processpl 1232 596 0 534 6 0 6 6 0 8 0 procpl 664 801 0 739 8 0 8 8 0 8 1 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 247 0 220 5 0 5 5 0 8 2 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 133 0 0 9 0 9 9 0 8 0 bufpl 280 2573 0 105 177 0 177 177 0 8 0 anonpl 32 11822 0 0 96 0 96 96 0 246 0 amapchunkpl 152 11750 0 11481 22 0 22 22 0 158 9 amappl16 200 2515 0 2500 29 18 11 28 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 445 0 444 1 0 1 1 0 8 0 amappl13 176 127 0 115 1 0 1 1 0 8 0 amappl12 168 813 0 791 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 62 0 48 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 171 0 168 1 0 1 1 0 8 0 amappl7 128 146 0 133 1 0 1 1 0 8 0 amappl6 120 156 0 154 1 0 1 1 0 8 0 amappl5 112 126 0 115 1 0 1 1 0 8 0 amappl4 104 300 0 279 1 0 1 1 0 8 0 amappl3 96 2265 0 2200 4 0 4 4 0 8 0 amappl2 88 558 0 497 2 0 2 2 0 8 0 amappl1 80 11021 0 10451 15 0 15 15 0 8 2 amappl 88 3380 0 3282 5 0 5 5 0 92 1 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 5 0 1 1 0 1 1 0 8 0 uaddrrnd 24 559 0 534 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 559 0 534 1 0 1 1 0 8 0 vmmpekpl 168 6705 0 6661 3 0 3 3 0 8 0 vmmpepl 168 45440 0 43887 107 0 107 107 0 357 28 vmsppl 488 558 0 534 5 0 5 5 0 8 2 rwobjpl 80 16607 0 15684 32 1 31 32 0 8 8 pdppl 4096 1125 0 1068 101 30 71 85 0 8 14 pvpl 32 18886 0 0 153 0 153 153 0 265 0 pmappl 256 558 0 534 3 0 3 3 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 273 0 32 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349b02e) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806f677cf0,41c0,fffffd80097fd410,ffff800038facf08) at ffs_inode_alloc+0x94e ufs_mkdir(ffff800038facf70) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd8076aa6468,ffff800038fad0d0,ffff800038fad100,ffff800038fad000) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff800038fa4fb8,ffffff9c,74ba0b287b40,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff800038fad280) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800038fad280) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ba0b287b00, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83a9ef40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a9ef40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80002a294d90) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a294d90) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f08adb20b60, count: 9 ddb{1}> trace x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83a9ef40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a9ef40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80002a294d90) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a294d90) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f08adb20b60, count: -6