panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *210967 75677 0 0x2 0 1K syz-executor 131543 8646 0 0x14000 0x200 0 zerothread db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349593d) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806cdc9018,41ed,fffffd80097fd6e8,ffff80002a328818) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a328880) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806d812040,ffff80002a3289e0,ffff80002a328a10,ffff80002a328910) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a235a08,ffffff9c,7654783d05b0,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff80002a328b90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a328b90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7654783d0650, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: ffs_valloc: dup alloc ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349593d) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806cdc9018,41ed,fffffd80097fd6e8,ffff80002a328818) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a328880) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806d812040,ffff80002a3289e0,ffff80002a328a10,ffff80002a328910) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a235a08,ffffff9c,7654783d05b0,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff80002a328b90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a328b90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7654783d0650, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a328590 rbx 0xffff80002999ee07 rdx 0 rcx 0xffff80002a235a08 rax 0xffff80002999dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe549294242c027b r11 0xcb3296852abefd53 r12 0xffff80002999ec08 r13 0 r14 0 r15 0x1 rip 0xffffffff82e5bf15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a328580 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=210967 pid=75677 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=0xffff80002a2222a8,0xffff80002a2354e8 process=0xffff8000ffff5818 user=0xffff80002a323000, vmspace=0xfffffd800b063d58 estcpu=36, cpticks=6, pctcpu=0.3, user=1, sys=5, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 67929 59520 72106 0 3 0x80 nanoslp syz-executor 67929 181921 72106 0 3 0x4000080 msgwait syz-executor 67929 398542 72106 0 3 0x4000080 fsleep syz-executor 45148 391109 97181 0 3 0x80 nanoslp syz-executor 45148 485964 97181 0 3 0x4000080 ttyin syz-executor 97181 441052 46139 0 3 0x82 nanoslp syz-executor 744 53904 46139 0 3 0x82 piperd syz-executor *75677 210967 46139 0 7 0x2 syz-executor 72106 183683 46139 0 3 0x82 nanoslp syz-executor 46139 470810 29123 0 3 0x82 wait syz-executor 29123 315575 68403 0 3 0x10008a sigsusp ksh 68403 82974 41913 0 3 0x98 kqread sshd-session 41913 160922 38183 0 3 0x92 kqread sshd-session 28892 130813 1 0 3 0x100083 ttyin getty 38183 124398 1 0 3 0x88 kqread sshd 62382 158616 47663 74 3 0x1100092 bpf pflogd 47663 149175 1 0 3 0x80 sbwait pflogd 71582 82937 60424 73 3 0x1100090 kqread syslogd 60424 408904 1 0 3 0x100082 sbwait syslogd 76399 281677 1 0 3 0x100080 kqread resolvd 35934 498414 58456 77 3 0x100092 kqread dhcpleased 59476 290088 58456 77 3 0x100092 kqread dhcpleased 58456 162427 1 0 3 0x80 kqread dhcpleased 68895 13009 0 0 3 0x14200 bored smr 8646 131543 0 0 7 0x14200 zerothread 2570 293105 0 0 3 0x14200 aiodoned aiodoned 78277 272498 0 0 3 0x14200 syncer update 51313 371017 0 0 3 0x14200 cleaner cleaner 88564 199657 0 0 3 0x14200 reaper reaper 55616 499205 0 0 3 0x14200 pgdaemon pagedaemon 51250 473660 0 0 3 0x14200 bored viomb 42814 390769 0 0 3 0x40014200 acpi0 acpi0 25047 336692 0 0 3 0x40014200 idle1 25859 296017 0 0 3 0x14200 bored softnet1 67681 52218 0 0 3 0x14200 bored softnet0 14829 331578 0 0 3 0x14200 bored systqmp 48273 428128 0 0 3 0x14200 bored systq 66031 155580 0 0 3 0x14200 tmoslp softclockmp 2022 380585 0 0 3 0x40014200 tmoslp softclock 47696 340235 0 0 3 0x40014200 idle0 1 491140 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 75677 (syz-executor) thread 0xffff80002a235a08 (210967) exclusive rrwlock inode r = 0 (0xfffffd806a01a568) #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 (0xfffffd806cdc90b8) #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 (0xffffffff83aaab00) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11053 12082K 12220K 166960K 12199 0 pcb 17 12K 12K 166960K 32 0 rtable 217 6K 6K 166960K 359 0 pf 33 17K 19K 166960K 50 0 ifaddr 39 6K 7K 166960K 46 0 ifgroup 51 2K 2K 166960K 57 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 76 0 ioctlops 0 0K 4K 166960K 1494 0 iov 0 0K 16K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1289 81K 82K 166960K 1396 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 7 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 12 41K 97K 166960K 182 0 proc 72 115K 164K 166960K 560 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 9 0 in_multi 88 6K 6K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 43 201K 201K 166960K 43 0 exec 0 0K 1K 166960K 395 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 192 158K 171K 166960K 3518 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 37 74K 105K 166960K 1368 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 3 0 NDP 11 0K 1K 166960K 29 0 temp 39 9111K 9177K 166960K 4446 0 kqueue 13 20K 28K 166960K 44 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 39 0 36 1 0 1 1 0 8 0 rtentry 176 111 0 12 5 0 5 5 0 8 0 unpcb 144 62 0 45 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 31 0 27 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 119 0 111 2 0 2 2 0 8 0 nd6 152 24 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 3 0 3 1 0 1 1 0 8 1 pfstscr 40 1 0 1 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 pfstlim 224 1 0 1 1 0 1 1 0 8 1 pfstitem 24 19 0 0 1 0 1 1 0 8 0 pfstkey 128 21 0 2 1 0 1 1 0 8 0 pfstate 448 20 0 1 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 453 0 44 29 0 29 29 0 8 1 art_table 40 454 0 44 5 0 5 5 0 8 0 art_node 32 111 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 72 7 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1656 0 194 93 0 93 93 0 8 0 ffsino 296 1659 0 197 114 0 114 114 0 8 0 nchpl 144 1917 0 222 64 0 64 64 0 8 0 vnodes 216 1764 0 0 98 0 98 98 0 8 0 namei 1024 5877 0 5876 2 0 2 2 0 8 1 percpumem 16 53 0 4 1 0 1 1 0 8 0 kstatmem 264 29 0 4 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6538 0 6538 4 3 1 3 1 8 1 plimitpl 152 32 0 15 1 0 1 1 0 8 0 sigapl 424 508 0 466 7 0 7 7 0 8 1 knotepl 120 310 0 0 10 0 10 10 0 8 0 kqueuepl 224 44 0 35 1 0 1 1 0 8 0 pipepl 344 133 0 106 3 0 3 3 0 8 0 fdescpl 528 492 0 466 3 0 3 3 0 8 0 filepl 160 1834 0 1627 10 0 10 10 0 8 0 lockfpl 104 26 0 24 1 0 1 1 0 8 0 lockfspl 48 14 0 12 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 34 0 17 1 0 1 1 0 8 0 ucredpl 104 135 0 122 1 0 1 1 0 8 0 zombiepl 144 470 0 466 1 0 1 1 0 8 0 processpl 1232 508 0 466 5 0 5 5 0 8 1 procpl 664 600 0 555 6 0 6 6 0 8 1 sockpl 752 221 0 193 4 0 4 4 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 176 0 0 11 0 11 11 0 8 0 bufpl 280 2362 0 105 162 0 162 162 0 8 0 anonpl 32 3794 0 0 31 0 31 31 0 246 0 amapchunkpl 152 9629 0 9285 20 0 20 20 0 158 3 amappl16 200 1818 0 1799 5 1 4 5 0 8 2 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 443 0 440 1 0 1 1 0 8 0 amappl13 176 128 0 116 1 0 1 1 0 8 0 amappl12 168 746 0 721 2 0 2 2 0 8 0 amappl11 160 8 0 7 1 0 1 1 0 8 0 amappl10 152 130 0 116 1 0 1 1 0 8 0 amappl9 144 282 0 282 1 1 0 1 0 8 0 amappl8 136 102 0 99 1 0 1 1 0 8 0 amappl7 128 152 0 139 1 0 1 1 0 8 0 amappl6 120 171 0 170 1 0 1 1 0 8 0 amappl5 112 97 0 87 1 0 1 1 0 8 0 amappl4 104 292 0 274 1 0 1 1 0 8 0 amappl3 96 1775 0 1692 3 0 3 3 0 8 0 amappl2 88 569 0 505 2 0 2 2 0 8 0 amappl1 80 10740 0 10156 15 0 15 15 0 8 1 amappl 88 2765 0 2644 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 492 0 466 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 492 0 466 1 0 1 1 0 8 0 vmmpekpl 168 6086 0 6048 2 0 2 2 0 8 0 vmmpepl 168 41002 0 39369 88 0 88 88 0 357 4 vmsppl 488 491 0 466 5 0 5 5 0 8 1 rwobjpl 80 15246 0 14263 24 0 24 24 0 8 1 pdppl 4096 991 0 932 101 30 71 87 0 8 12 pvpl 32 10117 0 0 82 0 82 82 0 265 0 pmappl 256 491 0 466 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 274 0 33 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83991ff0) 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(ffffffff83aaa300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83aaa300) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 uvm_pagezero_thread(ffff8000ffffc7d0) at uvm_pagezero_thread+0x7b sys/uvm/uvm_pmemrange.c:2232 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff83991ff0) 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(ffffffff83aaa300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83aaa300) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 uvm_pagezero_thread(ffff8000ffffc7d0) at uvm_pagezero_thread+0x7b sys/uvm/uvm_pmemrange.c:2232 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349593d) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806cdc9018,41ed,fffffd80097fd6e8,ffff80002a328818) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a328880) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806d812040,ffff80002a3289e0,ffff80002a328a10,ffff80002a328910) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a235a08,ffffff9c,7654783d05b0,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff80002a328b90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a328b90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7654783d0650, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349593d) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806cdc9018,41ed,fffffd80097fd6e8,ffff80002a328818) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a328880) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806d812040,ffff80002a3289e0,ffff80002a328a10,ffff80002a328910) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a235a08,ffffff9c,7654783d05b0,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff80002a328b90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a328b90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7654783d0650, count: -8