panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 42186 81479 0 0 0 1 syz-executor *185293 14185 60929 0x10 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8348641e) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd80741d05f0,4000,fffffd80097fd410,ffff80003c3e8f48) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80003c3e8fb0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806a643128,ffff80003c3e9110,ffff80003c3e9140,ffff80003c3e9040) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff800037ba8028,ffffff9c,200000000100,0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 syscall(ffff80003c3e92c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e92c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2ca79046d30, 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(ffffffff8348641e) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd80741d05f0,4000,fffffd80097fd410,ffff80003c3e8f48) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80003c3e8fb0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806a643128,ffff80003c3e9110,ffff80003c3e9140,ffff80003c3e9040) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff800037ba8028,ffffff9c,200000000100,0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 syscall(ffff80003c3e92c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e92c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2ca79046d30, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c3e8cc0 rbx 0xffffffff83995e07 cpu_info_full_primary+0x2e07 rdx 0xffff8000015f5900 rcx 0xffff800037ba8028 rax 0xffffffff83994ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xeb443006207729bf r11 0x979a1370616f17b2 r12 0xffffffff83995c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff8194f6b5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c3e8cb0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=185293 pid=14185 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=56, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800037ba8a88,0xffff800037ba9260 process=0xffff800037ba79e0 user=0xffff80003c3e4000, vmspace=0xfffffd806bfaf208 estcpu=6, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 81479 42186 18117 0 7 0 syz-executor 81479 280834 18117 0 2 0x4000000 syz-executor 81479 8410 18117 0 2 0x4000000 syz-executor 68842 284817 72647 0 3 0x80 nanoslp syz-executor 68842 161058 72647 0 3 0x4000080 lockf syz-executor 68842 143924 72647 0 3 0x4000080 fsleep syz-executor 14185 89401 14286 60929 2 0x10 syz-executor *14185 185293 14286 60929 7 0x4000010 syz-executor 62448 44825 40334 0 2 0x4000000 syz-executor 62448 271877 40334 0 2 0x4000000 syz-executor 62448 12959 40334 0 3 0x4000080 fsleep syz-executor 62448 216821 40334 0 3 0x4000080 fsleep syz-executor 85799 201346 32739 0 2 0 syz-executor 85799 180278 32739 0 3 0x4000080 fsleep syz-executor 85799 491057 32739 0 3 0x4000080 fsleep syz-executor 73164 462187 49407 0 2 0 syz-executor 73164 50472 49407 0 2 0x4000000 syz-executor 18117 229541 72157 0 3 0x82 nanoslp syz-executor 72647 158604 72157 0 3 0x82 nanoslp syz-executor 14286 274363 72157 0 2 0x2 syz-executor 13486 524213 72157 0 2 0x10000002 syz-executor 40334 48310 72157 0 3 0x82 nanoslp syz-executor 49407 344028 72157 0 2 0x2 syz-executor 32739 32786 72157 0 3 0x82 nanoslp syz-executor 72157 189568 13528 0 3 0x82 wait syz-executor 13528 148709 94217 0 3 0x10008a sigsusp ksh 94217 113109 85663 0 3 0x98 kqread sshd-session 85663 242802 48066 0 3 0x92 kqread sshd-session 81569 23714 1 0 3 0x100083 ttyin getty 48066 310389 1 0 3 0x88 kqread sshd 32363 328361 6492 74 3 0x1100092 bpf pflogd 6492 126689 1 0 3 0x80 sbwait pflogd 82277 485060 46182 73 3 0x1100090 kqread syslogd 46182 181585 1 0 3 0x100082 sbwait syslogd 48199 29320 1 0 3 0x100080 kqread resolvd 44942 462777 52433 77 3 0x100092 kqread dhcpleased 9888 138907 52433 77 3 0x100092 kqread dhcpleased 52433 44375 1 0 3 0x80 kqread dhcpleased 44021 512565 0 0 3 0x14200 bored smr 6097 16286 0 0 2 0x14200 zerothread 55570 53422 0 0 3 0x14200 aiodoned aiodoned 53997 152871 0 0 3 0x14200 syncer update 61557 337631 0 0 3 0x14200 cleaner cleaner 2458 268394 0 0 3 0x14200 reaper reaper 90670 49367 0 0 3 0x14200 pgdaemon pagedaemon 94133 213216 0 0 3 0x14200 bored viomb 20722 2844 0 0 3 0x40014200 acpi0 acpi0 63703 232877 0 0 3 0x40014200 idle1 56452 281405 0 0 3 0x14200 bored softnet1 67691 54571 0 0 3 0x14200 bored softnet0 38012 435843 0 0 3 0x14200 bored systqmp 11268 505439 0 0 3 0x14200 bored systq 28181 233125 0 0 3 0x14200 tmoslp softclockmp 50880 257905 0 0 3 0x40014200 tmoslp softclock 99479 5627 0 0 3 0x40014200 idle0 1 77475 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 14185 (syz-executor) thread 0xffff800037ba8028 (185293) exclusive rrwlock inode r = 0 (0xfffffd80741d08e0) #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:3143 #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 (0xfffffd80741d0690) #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+0x10f sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3128 #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 (0xffffffff83ac9940) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11067 12224K 12278K 166960K 12258 0 pcb 17 12K 12K 166960K 35 0 rtable 217 6K 7K 166960K 356 0 pf 34 17K 24K 166960K 68 0 ifaddr 39 6K 7K 166960K 47 0 ifgroup 51 2K 2K 166960K 65 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 74 0 ioctlops 0 0K 4K 166960K 1564 0 iov 0 0K 4K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1295 81K 82K 166960K 1430 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 11 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 216 0 sigio 0 0K 0K 166960K 1 0 proc 71 115K 180K 166960K 566 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 5 0 in_multi 88 6K 7K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 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 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 392 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 227 161K 182K 166960K 3839 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 41 82K 108K 166960K 1363 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 11 0K 2K 166960K 30 0 temp 34 9098K 9166K 166960K 10095 0 kqueue 14 22K 26K 166960K 40 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 44 0 41 1 0 1 1 0 8 0 rtentry 176 112 0 12 6 0 6 6 0 8 0 unpcb 144 61 0 42 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 27 0 21 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 116 0 107 2 0 2 2 0 8 0 nd6 152 25 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 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 4 0 0 1 0 1 1 0 8 0 pfstitem 24 24 0 0 1 0 1 1 0 8 0 pfstkey 128 24 0 0 1 0 1 1 0 8 0 pfstate 448 23 0 0 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 256 463 0 44 29 0 29 29 0 8 1 art_table 40 464 0 44 5 0 5 5 0 8 0 art_node 32 112 0 21 1 0 1 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1721 0 252 93 0 93 93 0 8 0 ffsino 296 1722 0 253 114 0 114 114 0 8 0 nchpl 144 2023 0 318 64 0 64 64 0 8 0 vnodes 216 1853 0 0 103 0 103 103 0 8 0 namei 1024 6256 0 6255 1 0 1 1 0 8 0 percpumem 16 52 0 3 1 0 1 1 0 8 0 kstatmem 264 31 0 6 2 0 2 2 0 8 0 scxspl 216 7421 0 7421 9 1 8 8 1 8 8 plimitpl 152 104 0 85 1 0 1 1 0 8 0 sigapl 424 530 0 483 7 0 7 7 0 8 1 knotepl 120 312 0 0 10 0 10 10 0 8 0 kqueuepl 224 49 0 37 2 0 2 2 0 8 1 pipepl 344 130 0 102 3 0 3 3 0 8 0 fdescpl 528 514 0 484 3 0 3 3 0 8 0 filepl 160 2031 0 1803 12 0 12 12 0 8 1 lockfpl 104 58 0 52 1 0 1 1 0 8 0 lockfspl 48 24 0 20 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 179 0 164 1 0 1 1 0 8 0 zombiepl 144 485 0 483 1 0 1 1 0 8 0 processpl 1232 530 0 483 5 0 5 5 0 8 0 procpl 664 679 0 621 6 0 6 6 0 8 0 sockpl 752 225 0 194 5 0 5 5 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 187 0 0 12 0 12 12 0 8 0 bufpl 280 2641 0 106 182 0 182 182 0 8 0 anonpl 32 3887 0 0 32 0 32 32 0 246 0 amapchunkpl 152 11320 0 10674 28 0 28 28 0 158 0 amappl16 200 1967 0 1943 5 2 3 5 0 8 1 amappl15 192 13 0 12 1 0 1 1 0 8 0 amappl14 184 428 0 427 1 0 1 1 0 8 0 amappl13 176 120 0 108 1 0 1 1 0 8 0 amappl12 168 778 0 748 2 0 2 2 0 8 0 amappl11 160 33 0 33 1 1 0 1 0 8 0 amappl10 152 70 0 56 1 0 1 1 0 8 0 amappl9 144 262 0 262 1 1 0 1 0 8 0 amappl8 136 142 0 140 1 0 1 1 0 8 0 amappl7 128 154 0 140 1 0 1 1 0 8 0 amappl6 120 162 0 160 1 0 1 1 0 8 0 amappl5 112 95 0 85 1 0 1 1 0 8 0 amappl4 104 299 0 281 1 0 1 1 0 8 0 amappl3 96 1988 0 1883 4 0 4 4 0 8 1 amappl2 88 537 0 473 2 0 2 2 0 8 0 amappl1 80 10170 0 9566 18 0 18 18 0 8 3 amappl 88 3094 0 2940 5 0 5 5 0 92 0 uvmvnodes 80 106 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 7 0 7 2 1 1 1 0 8 1 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 514 0 484 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 514 0 484 1 0 1 1 0 8 0 vmmpekpl 168 6157 0 6122 2 0 2 2 0 8 0 vmmpepl 168 41608 0 39749 96 0 96 96 0 357 10 vmsppl 488 513 0 484 5 0 5 5 0 8 1 rwobjpl 80 15093 0 14062 27 0 27 27 0 8 3 pdppl 4096 1035 0 968 99 28 71 87 0 8 4 pvpl 32 12028 0 0 98 1 97 98 0 265 0 pmappl 256 513 0 484 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 274 0 31 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(ffffffff8348641e) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd80741d05f0,4000,fffffd80097fd410,ffff80003c3e8f48) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80003c3e8fb0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806a643128,ffff80003c3e9110,ffff80003c3e9140,ffff80003c3e9040) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff800037ba8028,ffffff9c,200000000100,0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 syscall(ffff80003c3e92c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e92c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2ca79046d30, 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 end of kernel end trace frame: 0x75d3f4e505d0, count: 12 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 end of kernel end trace frame: 0x75d3f4e505d0, count: -3