panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *388883 50443 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8346bc9b) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffff8806d28c800,41ed,fffff88007ffd680,ffff80002a867938) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a8679a0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffff8806d3e9620,ffff80002a867b00,ffff80002a867b30,ffff80002a867a30) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a737230,ffffff9c,797528345520,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80002a867ca0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a867ca0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7975283455c0, 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(ffffffff8346bc9b) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffff8806d28c800,41ed,fffff88007ffd680,ffff80002a867938) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a8679a0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffff8806d3e9620,ffff80002a867b00,ffff80002a867b30,ffff80002a867a30) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a737230,ffffff9c,797528345520,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80002a867ca0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a867ca0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7975283455c0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a8676c0 rbx 0x6655 __ALIGN_SIZE+0x5655 rdx 0 rcx 0 rax 0xffff80002a737230 r8 0x101010101010101 r9 0x8080808080808080 r10 0x882e6d57f0429539 r11 0x1e9bbee6f0aa2723 r12 0 r13 0xfffff88071dce400 r14 0 r15 0x1 rip 0xffffffff82edcfd5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a8676b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=388883 pid=50443 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=0xffff80002a736d00,0xffff80002a736a78 process=0xffff80002a792410 user=0xffff80002a862000, vmspace=0xfffff8806fa86008 estcpu=36, cpticks=2, pctcpu=0.1, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 48797 110663 58704 0 2 0x100002 sh 74668 298251 77844 0 2 0 syz-executor 74668 65289 77844 0 3 0x4000080 fsleep syz-executor 97846 403013 23220 0 2 0 syz-executor 97846 65243 23220 0 3 0x4000080 fsleep syz-executor 58704 177688 96941 0 2 0x10000002 syz-executor 77844 161001 96941 0 3 0x82 nanoslp syz-executor *50443 388883 96941 0 7 0x2 syz-executor 23220 521184 96941 0 3 0x82 nanoslp syz-executor 96941 493016 1 0 3 0x82 wait syz-executor 66440 31226 8853 0 3 0x98 kqread sshd-session 8853 377797 28818 0 3 0x92 kqread sshd-session 75606 456531 1 0 3 0x100083 ttyin getty 28818 452141 1 0 3 0x88 kqread sshd 61293 458926 8329 73 3 0x1100090 kqread syslogd 8329 355972 1 0 3 0x100082 sbwait syslogd 63278 1965 1 0 3 0x100080 kqread resolvd 11072 180535 12010 77 3 0x100092 kqread dhcpleased 78337 16202 12010 77 3 0x100092 kqread dhcpleased 12010 131566 1 0 3 0x80 kqread dhcpleased 35921 69432 0 0 3 0x14200 bored smr 8226 33131 0 0 2 0x14200 zerothread 41179 328281 0 0 3 0x14200 aiodoned aiodoned 96731 77465 0 0 3 0x14200 syncer update 58175 288230 0 0 3 0x14200 cleaner cleaner 41239 306654 0 0 3 0x14200 reaper reaper 79534 7607 0 0 3 0x14200 pgdaemon pagedaemon 15211 212806 0 0 3 0x14200 bored viomb 50879 17697 0 0 3 0x40014200 acpi0 acpi0 22528 285485 0 0 3 0x14200 bored softnet0 74584 290782 0 0 3 0x14200 smrbar systqmp 45102 43208 0 0 3 0x14200 bored systq 9392 137256 0 0 3 0x40014200 tmoslp softclock 76158 219172 0 0 3 0x40014200 idle0 1 440331 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 11024 12098K 12118K 166960K 12120 0 pcb 17 12K 12K 166960K 18 0 rtable 238 7K 7K 166960K 352 0 pf 30 12K 13K 166960K 32 0 ifaddr 42 7K 7K 166960K 45 0 ifgroup 50 2K 2K 166960K 52 0 sysctl 1 1K 9K 166960K 5 0 counters 33 17K 18K 166960K 35 0 ioctlops 0 0K 4K 166960K 34 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1293 81K 81K 166960K 1364 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 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 13 45K 93K 166960K 137 0 proc 58 59K 83K 166960K 496 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 99 7K 7K 166960K 99 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 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 369 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 142K 159K 166960K 2951 0 UVM aobj 3 2K 2K 166960K 4 0 pinsyscall 33 66K 94K 166960K 1247 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 27 2K 2K 166960K 28 0 temp 33 9106K 9112K 166960K 3597 0 kqueue 13 20K 22K 166960K 28 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 36 0 33 1 0 1 1 0 8 0 rtentry 136 110 0 1 4 0 4 4 0 8 0 unpcb 144 39 0 24 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 74 0 70 7 0 7 7 0 8 6 arp 96 18 0 0 1 0 1 1 0 8 0 inpcb 328 125 0 118 7 0 7 7 0 8 6 nd6 112 23 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 451 0 0 29 0 29 29 0 8 0 art_table 40 452 0 0 5 0 5 5 0 8 0 art_node 32 110 0 9 1 0 1 1 0 8 0 shmpl 112 1 0 1 1 0 1 1 0 8 1 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1564 0 107 92 0 92 92 0 8 0 ffsino 256 1566 0 109 92 0 92 92 0 8 0 nchpl 144 1760 0 73 63 0 63 63 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 1653 0 0 92 0 92 92 0 8 0 namei 1024 5195 0 5194 1 0 1 1 0 8 0 kstatmem 264 25 0 2 2 0 2 2 0 8 0 scxspl 216 5852 0 5852 3 0 3 3 1 8 3 plimitpl 152 28 0 13 1 0 1 1 0 8 0 sigapl 424 436 0 399 6 0 6 6 0 8 1 knotepl 120 2058 0 2011 2 0 2 2 0 8 0 kqueuepl 184 24 0 15 1 0 1 1 0 8 0 pipepl 304 124 0 97 3 0 3 3 0 8 0 fdescpl 448 423 0 399 5 0 5 5 0 8 1 filepl 120 1527 0 1327 9 0 9 9 0 8 1 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 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 144 403 0 399 1 0 1 1 0 8 0 processpl 1152 436 0 399 4 0 4 4 0 8 0 procpl 664 446 0 407 5 0 5 5 0 8 0 sockpl 552 200 0 175 7 0 7 7 0 8 5 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 2496 0 2441 14 0 14 14 0 8 6 mcl2k 2048 115 0 115 1 0 1 1 0 8 1 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 4128 0 4032 9 0 9 9 0 8 1 bufpl 272 2237 0 102 143 0 143 143 0 8 0 anonpl 24 92250 0 89640 22 0 22 22 0 187 3 amapchunkpl 152 8026 0 7724 18 0 18 18 0 158 2 amappl16 200 1673 0 1660 5 0 5 5 0 8 4 amappl15 192 10 0 10 1 0 1 1 0 8 1 amappl14 184 483 0 482 1 0 1 1 0 8 0 amappl13 176 124 0 114 1 0 1 1 0 8 0 amappl12 168 676 0 653 2 0 2 2 0 8 0 amappl11 160 9 0 9 1 0 1 1 0 8 1 amappl10 152 61 0 49 1 0 1 1 0 8 0 amappl9 144 285 0 285 1 0 1 1 0 8 1 amappl8 136 122 0 121 1 0 1 1 0 8 0 amappl7 128 139 0 128 1 0 1 1 0 8 0 amappl6 120 154 0 151 1 0 1 1 0 8 0 amappl5 112 104 0 97 1 0 1 1 0 8 0 amappl4 104 283 0 268 1 0 1 1 0 8 0 amappl3 96 1365 0 1295 3 0 3 3 0 8 0 amappl2 88 520 0 469 2 0 2 2 0 8 0 amappl1 80 10082 0 9554 13 0 13 13 0 8 1 amappl 88 2257 0 2149 4 0 4 4 0 92 0 uvmvnodes 80 98 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 3 0 1 1 0 1 1 0 8 0 uaddrrnd 24 423 0 399 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 423 0 399 1 0 1 1 0 8 0 vmmpekpl 168 5452 0 5411 2 0 2 2 0 8 0 vmmpepl 168 36739 0 35272 77 0 77 77 0 357 4 vmsppl 368 422 0 399 4 0 4 4 0 8 1 rwobjpl 40 14062 0 13197 11 0 11 11 0 8 1 pdppl 4096 852 0 798 98 18 80 80 0 8 26 pvpl 32 212599 0 205783 67 0 67 67 0 265 1 pmappl 216 422 0 399 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 504 0 18 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(ffffffff8346bc9b) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffff8806d28c800,41ed,fffff88007ffd680,ffff80002a867938) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a8679a0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffff8806d3e9620,ffff80002a867b00,ffff80002a867b30,ffff80002a867a30) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a737230,ffffff9c,797528345520,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80002a867ca0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a867ca0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7975283455c0, 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(ffffffff8346bc9b) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(fffff8806d28c800,41ed,fffff88007ffd680,ffff80002a867938) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80002a8679a0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffff8806d3e9620,ffff80002a867b00,ffff80002a867b30,ffff80002a867a30) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a737230,ffffff9c,797528345520,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80002a867ca0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a867ca0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7975283455c0, count: -8