panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *389760 43791 0 0 0x4000000 0 syz-executor 160631 24544 0 0x2 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834950a6) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd8064dc6a90,2000,fffffd80097fd410,ffff80003c3cdf60) at ffs_inode_alloc+0x94e ufs_makeinode(2000,fffffd80645c0be0,ffff80003c3ce178,ffff80003c3ce1a8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_mknod(ffff80003c3ce020) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 VOP_MKNOD(fffffd80645c0be0,ffff80003c3ce178,ffff80003c3ce1a8,ffff80003c3ce0a8) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 domknodat(ffff8000ffff27e0,ffffff9c,200000000180,2000,d01) at domknodat+0x469 sys/kern/vfs_syscalls.c:1665 syscall(ffff80003c3ce340) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3ce340) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd9318a88640, 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{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(ffffffff834950a6) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd8064dc6a90,2000,fffffd80097fd410,ffff80003c3cdf60) at ffs_inode_alloc+0x94e ufs_makeinode(2000,fffffd80645c0be0,ffff80003c3ce178,ffff80003c3ce1a8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_mknod(ffff80003c3ce020) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 VOP_MKNOD(fffffd80645c0be0,ffff80003c3ce178,ffff80003c3ce1a8,ffff80003c3ce0a8) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 domknodat(ffff8000ffff27e0,ffffff9c,200000000180,2000,d01) at domknodat+0x469 sys/kern/vfs_syscalls.c:1665 syscall(ffff80003c3ce340) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3ce340) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd9318a88640, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c3cdcf0 rbx 0xffffffff8397de07 cpu_info_full_primary+0x2e07 rdx 0xffff8000015d3b00 rcx 0xffff8000ffff27e0 rax 0xffffffff8397cff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x243425cc137f534d r11 0xf1d0b691559d5c6a r12 0xffffffff8397dc08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff82a15865 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c3cdce0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=389760 pid=43791 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff2a78,0xffffffff839f2c18 process=0xffff80003c3d1d00 user=0xffff80003c3c9000, vmspace=0xfffffd806c698018 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 15961 113620 73347 0 2 0 syz-executor 15961 344354 73347 0 2 0x4000000 syz-executor 43791 253849 24544 0 2 0 syz-executor *43791 389760 24544 0 7 0x4000000 syz-executor 13132 282177 34918 0 2 0x2 syz-executor 39080 492429 55340 0 3 0x100082 sbwait arp 55340 388844 11333 0 3 0x10008a sigsusp sh 11333 139794 34918 0 3 0x82 wait syz-executor 84557 488893 34918 0 3 0x82 piperd syz-executor 73347 11524 34918 0 2 0xc82 syz-executor 24544 160631 34918 0 7 0x2 syz-executor 34918 411478 35484 0 2 0xc82 syz-executor 35484 462445 28087 0 3 0x10008a sigsusp ksh 28087 38393 54680 0 3 0x98 kqread sshd-session 54680 346533 91167 0 3 0x92 kqread sshd-session 47863 253477 1 0 3 0x100083 ttyin getty 91167 172119 1 0 3 0x88 kqread sshd 80569 304572 31011 74 3 0x1100092 bpf pflogd 31011 181396 1 0 3 0x80 sbwait pflogd 98350 30729 66551 73 3 0x1100090 kqread syslogd 66551 237122 1 0 3 0x100082 sbwait syslogd 86825 396539 1 0 3 0x100080 kqread resolvd 43775 86630 90497 77 3 0x100092 kqread dhcpleased 44717 116523 90497 77 3 0x100092 kqread dhcpleased 90497 415769 1 0 3 0x80 kqread dhcpleased 40109 522430 0 0 3 0x14200 bored smr 90454 35831 0 0 2 0x14200 zerothread 75781 357006 0 0 3 0x14200 aiodoned aiodoned 20032 50391 0 0 3 0x14200 syncer update 94322 406926 0 0 3 0x14200 cleaner cleaner 23942 329404 0 0 3 0x14200 reaper reaper 85808 174634 0 0 3 0x14200 pgdaemon pagedaemon 89997 49728 0 0 3 0x14200 bored viomb 58834 433569 0 0 3 0x40014200 acpi0 acpi0 10651 456501 0 0 3 0x40014200 idle1 44849 332151 0 0 3 0x14200 bored softnet1 2444 150239 0 0 3 0x14200 bored softnet0 31536 429297 0 0 3 0x14200 smrbar systqmp 68530 491475 0 0 3 0x14200 bored systq 65508 174908 0 0 3 0x14200 tmoslp softclockmp 7498 359524 0 0 3 0x40014200 tmoslp softclock 90242 37336 0 0 3 0x40014200 idle0 1 475093 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 43791 (syz-executor) thread 0xffff8000ffff27e0 (389760) exclusive rrwlock inode r = 0 (0xfffffd8064dc67b8) #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_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 #9 VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 #10 domknodat+0x469 sys/kern/vfs_syscalls.c:1665 #11 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8064dc6b30) #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 domknodat+0xb4 sys/kern/vfs_syscalls.c:1617 #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 (0xffffffff83ad8040) #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 31536 (systqmp) thread 0xffff8000ffffe530 (429297) shared rwlock systqmp r = 0 (0xffffffff839b3908) #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 11050 12082K 12159K 166960K 12161 0 pcb 18 12K 12K 166960K 26 0 rtable 199 5K 6K 166960K 330 0 pf 32 17K 18K 166960K 45 0 ifaddr 37 6K 7K 166960K 43 0 ifgroup 51 2K 2K 166960K 55 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 1487 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1290 81K 81K 166960K 1372 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 14 46K 93K 166960K 139 0 proc 70 115K 180K 166960K 545 0 subproc 63 3K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 78 5K 6K 166960K 89 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 375 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 194 160K 177K 166960K 3099 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 40 80K 106K 166960K 1269 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 11 0K 1K 166960K 26 0 temp 29 9109K 9174K 166960K 4050 0 kqueue 13 20K 22K 166960K 23 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 33 0 29 1 0 1 1 0 8 0 rtentry 176 103 0 12 5 0 5 5 0 8 0 unpcb 144 43 0 26 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 9 0 5 1 0 1 1 0 8 0 arp 136 17 0 2 1 0 1 1 0 8 0 inpcb 328 71 0 63 1 0 1 1 0 8 0 nd6 152 21 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 1 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 pfstitem 24 16 0 0 1 0 1 1 0 8 0 pfstkey 128 16 0 0 1 0 1 1 0 8 0 pfstate 448 16 0 0 2 0 2 2 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 256 411 0 0 26 0 26 26 0 8 0 art_table 40 412 0 0 5 0 5 5 0 8 0 art_node 32 103 0 11 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1583 0 115 92 0 92 92 0 8 0 ffsino 296 1585 0 117 114 0 114 114 0 8 0 nchpl 144 1787 0 85 64 0 64 64 0 8 0 vnodes 216 1679 0 0 94 0 94 94 0 8 0 namei 1024 5371 0 5370 2 0 2 2 0 8 1 percpumem 16 50 0 1 1 0 1 1 0 8 0 kstatmem 264 27 0 2 2 0 2 2 0 8 0 scxspl 216 6219 0 6219 4 3 1 3 1 8 1 plimitpl 152 28 0 11 1 0 1 1 0 8 0 sigapl 424 451 0 407 7 0 7 7 0 8 1 knotepl 120 56 0 0 2 0 2 2 0 8 0 kqueuepl 224 21 0 12 1 0 1 1 0 8 0 pipepl 344 125 0 98 3 0 3 3 0 8 0 fdescpl 528 435 0 407 3 0 3 3 0 8 0 filepl 160 1558 0 1361 10 0 10 10 0 8 1 lockfpl 104 10 0 8 1 0 1 1 0 8 0 lockfspl 48 6 0 4 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 70 0 57 1 0 1 1 0 8 0 zombiepl 144 410 0 407 1 0 1 1 0 8 0 processpl 1232 451 0 407 5 0 5 5 0 8 0 procpl 664 465 0 419 5 0 5 5 0 8 0 sockpl 752 147 0 118 4 0 4 4 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 181 0 0 12 0 12 12 0 8 0 bufpl 280 2310 0 105 158 0 158 158 0 8 0 anonpl 32 5219 0 0 43 0 43 43 0 246 0 amapchunkpl 152 8690 0 8351 20 0 20 20 0 158 5 amappl16 200 2058 0 2044 5 1 4 5 0 8 3 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 460 0 457 1 0 1 1 0 8 0 amappl13 176 118 0 105 1 0 1 1 0 8 0 amappl12 168 688 0 662 2 0 2 2 0 8 0 amappl11 160 9 0 8 1 0 1 1 0 8 0 amappl10 152 134 0 120 1 0 1 1 0 8 0 amappl9 144 278 0 278 1 1 0 1 0 8 0 amappl8 136 100 0 98 1 0 1 1 0 8 0 amappl7 128 152 0 138 1 0 1 1 0 8 0 amappl6 120 154 0 151 1 0 1 1 0 8 0 amappl5 112 133 0 123 1 0 1 1 0 8 0 amappl4 104 283 0 260 1 0 1 1 0 8 0 amappl3 96 1450 0 1369 3 0 3 3 0 8 0 amappl2 88 523 0 462 2 0 2 2 0 8 0 amappl1 80 9267 0 8657 15 0 15 15 0 8 0 amappl 88 2393 0 2275 4 0 4 4 0 92 0 uvmvnodes 80 100 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 24 435 0 407 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 435 0 407 1 0 1 1 0 8 0 vmmpekpl 168 5476 0 5442 2 0 2 2 0 8 0 vmmpepl 168 36549 0 34864 88 0 88 88 0 357 7 vmsppl 488 434 0 407 5 0 5 5 0 8 0 rwobjpl 80 13849 0 12847 24 0 24 24 0 8 1 pdppl 4096 877 0 814 97 22 75 85 0 8 12 pvpl 32 12571 0 0 102 0 102 102 0 265 0 pmappl 256 434 0 407 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 265 0 25 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(ffffffff834950a6) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd8064dc6a90,2000,fffffd80097fd410,ffff80003c3cdf60) at ffs_inode_alloc+0x94e ufs_makeinode(2000,fffffd80645c0be0,ffff80003c3ce178,ffff80003c3ce1a8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_mknod(ffff80003c3ce020) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 VOP_MKNOD(fffffd80645c0be0,ffff80003c3ce178,ffff80003c3ce1a8,ffff80003c3ce0a8) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 domknodat(ffff8000ffff27e0,ffffff9c,200000000180,2000,d01) at domknodat+0x469 sys/kern/vfs_syscalls.c:1665 syscall(ffff80003c3ce340) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3ce340) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd9318a88640, count: -9 ddb{0}> machine ddbcpu 1