panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 20180 35044 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834a014d) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(ffffef0079863800,2000,ffffef0007ffd888,ffff80002a7db790) at ffs_inode_alloc+0x94e ufs_makeinode(2000,ffffef00634846d0,ffff80002a7db9a8,ffff80002a7db9d8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1760 ufs_mknod(ffff80002a7db850) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 VOP_MKNOD(ffffef00634846d0,ffff80002a7db9a8,ffff80002a7db9d8,ffff80002a7db8d8) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 domknodat(ffff80002a7547f0,ffffff9c,200000000040,2000,412dff) at domknodat+0x457 sys/kern/vfs_syscalls.c:1579 syscall(ffff80002a7dbb60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7dbb60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8ab8c09d850, count: 6 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> show kasan No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834a014d) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(ffffef0079863800,2000,ffffef0007ffd888,ffff80002a7db790) at ffs_inode_alloc+0x94e ufs_makeinode(2000,ffffef00634846d0,ffff80002a7db9a8,ffff80002a7db9d8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1760 ufs_mknod(ffff80002a7db850) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 VOP_MKNOD(ffffef00634846d0,ffff80002a7db9a8,ffff80002a7db9d8,ffff80002a7db8d8) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 domknodat(ffff80002a7547f0,ffffff9c,200000000040,2000,412dff) at domknodat+0x457 sys/kern/vfs_syscalls.c:1579 syscall(ffff80002a7dbb60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7dbb60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8ab8c09d850, count: -9 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a7db530 rbx 0x6a40 __ALIGN_SIZE+0x5a40 rdx 0 rcx 0 rax 0xffff80002a7547f0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe518c9eda7990f27 r11 0x5ac4b0ac8826049e r12 0 r13 0xffffef006d57c900 r14 0 r15 0x1 rip 0xffffffff816da6e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a7db520 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=20180 pid=35044 tcnt=5 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=69, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a754d20,0xffff80002a755260 process=0xffff80002a77c498 user=0xffff80002a7d6000, vmspace=0xffffef006d0b0b90 estcpu=19, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 67656 365545 78955 0 3 0x2 0 clonelk ifconfig 78955 122272 84069 0 3 0x100002 0x88 sigsusp sh 35044 206474 12392 0 2 0 0 syz-executor *35044 20180 12392 0 7 0 0x4000000 syz-executor 35044 436293 12392 0 3 0 0x4000000 inode syz-executor 35044 262530 12392 0 3 0 0x4000000 inode syz-executor 35044 513549 12392 0 3 0 0x4000000 inode syz-executor 84069 437119 58663 0 3 0x2 0x80 wait syz-executor 88380 282808 30598 0 3 0x2 0 clonelk ifconfig 30598 517604 25152 0 3 0x100002 0x88 sigsusp sh 25152 35616 58663 0 3 0x2 0x80 wait syz-executor 12392 229522 58663 0 3 0x2 0x80 nanoslp syz-executor 49278 81625 58663 0 3 0x2 0x80 piperd syz-executor 58231 317431 0 0 3 0x14000 0x200 acct acct 69946 245644 1 0 3 0x100003 0x80 ttyin getty 58663 379779 85740 0 3 0x2 0x80 nanoslp syz-executor 85740 307115 87816 0 3 0x100002 0x88 sigsusp ksh 87816 83816 85792 0 3 0x10 0x88 kqread sshd-session 85792 2178 52679 0 3 0x12 0x80 kqread sshd-session 52679 167414 1 0 3 0 0x88 kqread sshd 90813 113689 87303 73 3 0x1100010 0x80 kqread syslogd 87303 404396 1 0 3 0x100002 0x80 sbwait syslogd-parent 95622 272459 1 0 3 0x100000 0x80 kqread resolvd 71494 341255 58621 77 3 0x100012 0x80 kqread dhcpleased 50090 30870 58621 77 3 0x100012 0x80 kqread dhcpleased 58621 477143 1 0 3 0 0x80 kqread dhcpleased 78422 265440 0 0 3 0x14000 0x200 bored smr 12119 242085 0 0 2 0x14000 0x200 zerothread 33121 466930 0 0 3 0x14000 0x200 aiodoned aiodoned 63570 436040 0 0 3 0x14000 0x200 syncer update 50111 503798 0 0 3 0x14000 0x200 cleaner cleaner 53956 27455 0 0 3 0x14000 0x200 reaper reaper 26834 321594 0 0 3 0x14000 0x200 pgdaemon pagedaemon 46327 436082 0 0 3 0x14000 0x200 bored viomb 22133 326232 0 0 3 0x14000 0x40000200 acpi0 acpi0 59372 105902 0 0 3 0x14000 0x200 bored softnet0 6019 474654 0 0 3 0x14000 0x200 smrbar systqmp 72747 444425 0 0 3 0x14000 0x200 bored systq 80564 507718 0 0 3 0x14000 0x40000200 tmoslp softclock 67138 302382 0 0 3 0x14000 0x40000200 idle0 1 130625 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10010000 0x200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11018 12100K 12302K 166960K 12541 0 pcb 17 16K 20K 166960K 283 0 rtable 128 4K 7K 166960K 1954 0 pf 20 11K 4176K 166960K 227 0 ifaddr 23 4K 7K 166960K 280 0 ifgroup 27 1K 2K 166960K 313 0 sysctl 2 1K 9K 166960K 7 0 counters 28 17K 18K 166960K 107 0 ioctlops 0 0K 4K 166960K 367 0 iov 0 0K 12K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1295 81K 82K 166960K 2387 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 21 1K 1K 166960K 21 0 dirhash 15 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12472 0 file desc 12 41K 97K 166960K 1390 0 sigio 0 0K 0K 166960K 6 0 proc 74 75K 124K 166960K 2023 0 subproc 45 2K 4K 166960K 756 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 96 0 in_multi 44 2K 6K 166960K 679 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 28 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 1179 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 158 117K 158K 166960K 11001 0 UVM aobj 131 4K 6K 166960K 134 0 pinsyscall 33 66K 96K 166960K 3976 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 10 0K 2K 166960K 200 0 temp 26 9118K 9259K 166960K 24443 0 kqueue 13 20K 28K 166960K 107 0 SYN cache 2 16K 24K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 233 0 230 3 0 3 3 0 8 2 rtentry 136 696 0 640 4 0 4 4 0 8 1 unpcb 144 358 0 343 6 0 6 6 0 8 5 syncache 336 9 0 9 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 149 0 143 4 0 4 4 0 8 3 arp 96 123 0 115 1 0 1 1 0 8 0 ipq 40 4 0 1 1 0 1 1 0 8 0 ipqe 40 7 0 3 1 0 1 1 0 8 0 inpcb 328 834 0 823 7 0 7 7 0 8 5 ip6q 80 1 0 0 1 0 1 1 0 8 0 ip6af 40 2 0 0 1 0 1 1 0 8 0 nd6 112 183 0 174 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 84 0 79 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1072 15 0 15 1 0 1 1 0 8 1 pppxif 1416 5 0 5 1 0 1 1 0 8 1 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 6 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 2 0 0 1 0 1 1 0 8 0 pfrule 1360 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 2830 0 2548 36 12 24 33 0 8 4 art_table 40 2831 0 2548 6 0 6 6 0 8 2 art_node 32 694 0 644 1 0 1 1 0 8 0 sysvmsgpl 40 34 0 1 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 72 19 0 0 1 0 1 1 0 8 0 shmpl 120 129 0 1 4 0 4 4 0 8 0 dirhash 1024 21 0 2 3 0 3 3 0 8 0 dino2pl 256 2465 0 864 101 0 101 101 0 8 0 ffsino 256 2465 0 864 101 0 101 101 0 8 0 nchpl 144 3078 0 1139 72 0 72 72 0 8 0 vnodes 216 3367 0 0 188 0 188 188 0 8 0 namei 1024 17393 0 17389 4 0 4 4 0 8 3 vcpupl 3968 12 0 12 2 0 2 2 0 8 2 vmpool 808 1 0 1 1 0 1 1 0 8 1 kstatmem 264 161 0 148 2 0 2 2 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 10600 0 10600 8 0 8 8 1 8 8 plimitpl 152 267 0 252 1 0 1 1 0 8 0 sigapl 424 1532 0 1492 6 0 6 6 0 8 0 knotepl 120 14933 0 14886 10 0 10 10 0 8 8 kqueuepl 184 217 0 208 4 0 4 4 0 8 3 pipepl 304 549 0 522 3 0 3 3 0 8 0 fdescpl 448 1516 0 1492 5 0 5 5 0 8 1 filepl 120 6613 0 6416 12 0 12 12 0 8 4 lockfpl 104 110 0 108 1 0 1 1 0 8 0 lockfspl 48 42 0 40 1 0 1 1 0 8 0 sessionpl 144 180 0 172 1 0 1 1 0 8 0 pgrppl 48 330 0 315 1 0 1 1 0 8 0 ucredpl 104 600 0 589 1 0 1 1 0 8 0 zombiepl 144 1495 0 1492 1 0 1 1 0 8 0 processpl 1160 1532 0 1492 4 0 4 4 0 8 0 procpl 664 2179 0 2135 6 0 6 6 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 552 1504 0 1475 12 1 11 12 0 8 7 mcl64k 65536 13 0 12 1 0 1 1 0 8 0 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k128 9344 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 19 0 18 1 0 1 1 0 8 0 mcl4k 4096 3026 0 2976 14 0 14 14 0 8 5 mcl2k 2048 1304 0 1301 3 0 3 3 0 8 2 mextrefs 64 330 0 330 1 0 1 1 0 8 1 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 12881 0 12758 20 1 19 20 0 8 8 bufpl 272 3401 0 93 221 0 221 221 0 8 0 anonpl 24 179552 0 176880 49 0 49 49 0 187 23 amapchunkpl 152 31370 0 31088 31 0 31 31 0 158 17 amappl16 200 1851 0 1843 14 5 9 14 0 8 8 amappl15 192 10 0 9 1 0 1 1 0 8 0 amappl14 184 1035 0 1032 1 0 1 1 0 8 0 amappl13 176 221 0 211 1 0 1 1 0 8 0 amappl12 168 2041 0 2020 2 0 2 2 0 8 0 amappl11 160 10 0 9 1 0 1 1 0 8 0 amappl10 152 60 0 52 1 0 1 1 0 8 0 amappl9 144 278 0 278 1 0 1 1 0 8 1 amappl8 136 299 0 296 1 0 1 1 0 8 0 amappl7 128 248 0 237 1 0 1 1 0 8 0 amappl6 120 428 0 425 1 0 1 1 0 8 0 amappl5 112 341 0 330 1 0 1 1 0 8 0 amappl4 104 465 0 451 1 0 1 1 0 8 0 amappl3 96 6495 0 6422 4 0 4 4 0 8 1 amappl2 88 657 0 609 2 0 2 2 0 8 0 amappl1 80 18828 0 18303 13 0 13 13 0 8 0 amappl 88 9316 0 9216 5 0 5 5 0 92 2 uvmvnodes 80 108 0 0 3 0 3 3 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 1516 0 1492 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1516 0 1492 1 0 1 1 0 8 0 vmmpekpl 168 13856 0 13814 3 0 3 3 0 8 0 vmmpepl 168 106414 0 105020 87 0 87 87 0 357 20 vmsppl 368 1515 0 1492 4 0 4 4 0 8 1 rwobjpl 40 30275 0 29283 13 0 13 13 0 8 0 pdppl 4096 3040 0 2986 146 90 56 82 0 8 2 pvpl 32 548847 0 542073 122 0 122 122 0 265 51 pmappl 216 1516 0 1493 3 0 3 3 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 673 0 103 17 0 17 17 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(ffffffff834a014d) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(ffffef0079863800,2000,ffffef0007ffd888,ffff80002a7db790) at ffs_inode_alloc+0x94e ufs_makeinode(2000,ffffef00634846d0,ffff80002a7db9a8,ffff80002a7db9d8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1760 ufs_mknod(ffff80002a7db850) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 VOP_MKNOD(ffffef00634846d0,ffff80002a7db9a8,ffff80002a7db9d8,ffff80002a7db8d8) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 domknodat(ffff80002a7547f0,ffffff9c,200000000040,2000,412dff) at domknodat+0x457 sys/kern/vfs_syscalls.c:1579 syscall(ffff80002a7dbb60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7dbb60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8ab8c09d850, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834a014d) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_inode_alloc(ffffef0079863800,2000,ffffef0007ffd888,ffff80002a7db790) at ffs_inode_alloc+0x94e ufs_makeinode(2000,ffffef00634846d0,ffff80002a7db9a8,ffff80002a7db9d8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1760 ufs_mknod(ffff80002a7db850) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 VOP_MKNOD(ffffef00634846d0,ffff80002a7db9a8,ffff80002a7db9d8,ffff80002a7db8d8) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 domknodat(ffff80002a7547f0,ffffff9c,200000000040,2000,412dff) at domknodat+0x457 sys/kern/vfs_syscalls.c:1579 syscall(ffff80002a7dbb60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7dbb60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8ab8c09d850, count: -9