panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *358942 30930 0 0 0x4000000 0 syz-executor 53661 19293 0 0x2 0x1 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8342dfde) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806073b968,2000,fffffd80097fd0d0,ffff800039bc06d0) at ffs_inode_alloc+0x94e ufs_makeinode(2000,fffffd806c7bc5f8,ffff800039bc08e8,ffff800039bc0918) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_mknod(ffff800039bc0790) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 VOP_MKNOD(fffffd806c7bc5f8,ffff800039bc08e8,ffff800039bc0918,ffff800039bc0818) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 domknodat(ffff8000ffff27e0,ffffff9c,200000000280,2000,1e5f) at domknodat+0x469 sys/kern/vfs_syscalls.c:1659 syscall(ffff800039bc0ab0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039bc0ab0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1a6936b0da0, 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(ffffffff8342dfde) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806073b968,2000,fffffd80097fd0d0,ffff800039bc06d0) at ffs_inode_alloc+0x94e ufs_makeinode(2000,fffffd806c7bc5f8,ffff800039bc08e8,ffff800039bc0918) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_mknod(ffff800039bc0790) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 VOP_MKNOD(fffffd806c7bc5f8,ffff800039bc08e8,ffff800039bc0918,ffff800039bc0818) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 domknodat(ffff8000ffff27e0,ffffff9c,200000000280,2000,1e5f) at domknodat+0x469 sys/kern/vfs_syscalls.c:1659 syscall(ffff800039bc0ab0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039bc0ab0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1a6936b0da0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800039bc0460 rbx 0xffffffff83933e07 cpu_info_full_primary+0x2e07 rdx 0xffff8000015ed880 rcx 0xffff8000ffff27e0 rax 0xffffffff83932ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xefdbed977c0d87b7 r11 0x227e5fab997160e5 r12 0xffffffff83933c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff831693e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800039bc0450 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=358942 pid=30930 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff3770,0xffff800033b9e800 process=0xffff8000fffed828 user=0xffff800039bbb000, vmspace=0xfffffd806c60d7c0 estcpu=7, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 44297 187380 76528 0 2 0 syz-executor 44297 377012 76528 0 2 0x4000000 syz-executor 44297 39845 76528 0 2 0x4000000 syz-executor 8308 168435 58733 0 2 0 syz-executor 8308 393476 58733 0 3 0x4000080 fsleep syz-executor 50991 140006 10840 60929 2 0x10 syz-executor 50991 517783 10840 60929 2 0x4000010 syz-executor 50991 495112 10840 60929 3 0x4000090 fsleep syz-executor 25598 309507 4365 0 2 0 syz-executor 25598 487856 4365 0 3 0x4000080 fsleep syz-executor 25598 432319 4365 0 3 0x4000080 fsleep syz-executor 30930 265878 19293 0 2 0 syz-executor *30930 358942 19293 0 7 0x4000000 syz-executor 35584 189461 949 0 2 0xc80 syz-executor 35584 371247 949 0 3 0x4000080 fifor syz-executor 35584 239507 949 0 3 0x4000080 fsleep syz-executor 50139 295932 77590 0 2 0x2 syz-executor 949 427 77590 0 3 0x82 nanoslp syz-executor 10840 202516 77590 0 2 0x2 syz-executor 4365 8581 77590 0 2 0xc82 syz-executor 19293 53661 77590 0 7 0x3 syz-executor 76528 218817 77590 0 3 0x82 nanoslp syz-executor 10836 406960 77590 0 3 0x82 nanoslp syz-executor 58733 355700 77590 0 3 0x82 nanoslp syz-executor 77590 365458 81840 0 3 0x82 kqread syz-executor 81840 347273 91469 0 3 0x10008a sigsusp ksh 91469 308557 23332 0 3 0x98 kqread sshd-session 23332 425286 90849 0 3 0x92 kqread sshd-session 22820 187071 1 0 3 0x100083 ttyin getty 90849 239709 1 0 3 0x88 kqread sshd 31760 462801 34173 74 3 0x1100092 bpf pflogd 34173 523969 1 0 3 0x80 sbwait pflogd 87435 515726 17142 73 3 0x1100090 kqread syslogd 17142 388295 1 0 3 0x100082 sbwait syslogd 31716 124600 1 0 3 0x100080 kqread resolvd 38056 474810 1893 77 3 0x100092 kqread dhcpleased 15419 394684 1893 77 3 0x100092 kqread dhcpleased 1893 161542 1 0 3 0x80 kqread dhcpleased 41457 22389 0 0 3 0x14200 bored smr 83106 254673 0 0 2 0x14200 zerothread 50513 160380 0 0 3 0x14200 aiodoned aiodoned 68278 40989 0 0 3 0x14200 syncer update 84629 331660 0 0 3 0x14200 cleaner cleaner 16523 12379 0 0 3 0x14200 reaper reaper 98677 234554 0 0 3 0x14200 pgdaemon pagedaemon 54144 10477 0 0 3 0x14200 bored viomb 93725 514692 0 0 3 0x40014200 acpi0 acpi0 13406 438291 0 0 3 0x40014200 idle1 3720 350731 0 0 3 0x14200 bored softnet1 729 517871 0 0 3 0x14200 bored softnet0 42451 294746 0 0 3 0x14200 bored systqmp 29759 422584 0 0 3 0x14200 bored systq 64596 328288 0 0 3 0x14200 tmoslp softclockmp 57927 219811 0 0 3 0x40014200 tmoslp softclock 85343 418833 0 0 3 0x40014200 idle0 1 456421 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 30930 (syz-executor) thread 0xffff8000ffff27e0 (358942) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839f7f40) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 biowait+0xc6 sys/kern/vfs_bio.c:1242 #4 ffs_vget+0x283 sys/ufs/ffs/ffs_vfsops.c:1249 #5 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #6 ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #7 ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 #8 VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 #9 domknodat+0x469 sys/kern/vfs_syscalls.c:1659 #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 (0xfffffd806073b440) #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:1659 #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 (0xfffffd806073ba08) #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:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domknodat+0xb4 sys/kern/vfs_syscalls.c:1611 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11060 12090K 12163K 166960K 12182 0 pcb 19 12K 12K 166960K 27 0 rtable 238 7K 8K 166960K 364 0 pf 37 18K 25K 166960K 74 0 ifaddr 44 7K 7K 166960K 46 0 ifgroup 60 2K 2K 166960K 60 0 sysctl 1 1K 9K 166960K 5 0 counters 72 37K 37K 166960K 72 0 ioctlops 0 0K 4K 166960K 1498 0 iov 0 0K 4K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1296 81K 82K 166960K 1375 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 5 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 157 0 proc 71 115K 164K 166960K 554 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 3 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 37 175K 175K 166960K 37 0 exec 0 0K 1K 166960K 393 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 239 159K 168K 166960K 3417 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 42 84K 107K 166960K 1324 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 13 0K 2K 166960K 29 0 temp 37 9080K 9146K 166960K 6359 0 kqueue 13 20K 22K 166960K 25 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 36 0 33 1 0 1 1 0 8 0 rtentry 176 111 0 1 5 0 5 5 0 8 0 unpcb 144 47 0 23 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 12 0 8 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 90 0 79 2 0 2 2 0 8 0 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 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 pfrktable 1344 3 0 3 1 0 1 1 0 8 1 pfanchor 1288 5 0 1 1 0 1 1 0 8 0 pfstitem 24 18 0 0 1 0 1 1 0 8 0 pfstkey 128 18 0 0 1 0 1 1 0 8 0 pfstate 448 18 0 0 2 0 2 2 0 8 0 pfrule 1360 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 40 453 0 0 5 0 5 5 0 8 0 art_node 32 111 0 11 1 0 1 1 0 8 0 semapl 112 3 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1601 0 129 93 0 93 93 0 8 0 ffsino 296 1601 0 129 114 0 114 114 0 8 0 nchpl 144 1830 0 127 64 0 64 64 0 8 0 vnodes 216 1698 0 0 95 0 95 95 0 8 0 namei 1024 5693 0 5692 2 0 2 2 0 8 1 percpumem 16 51 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 28 0 0 2 0 2 2 0 8 0 scxspl 216 6170 0 6170 4 3 1 3 1 8 1 plimitpl 152 27 0 10 1 0 1 1 0 8 0 sigapl 424 478 0 431 7 0 7 7 0 8 1 knotepl 120 54 0 0 2 0 2 2 0 8 0 kqueuepl 224 22 0 13 1 0 1 1 0 8 0 pipepl 344 128 0 101 3 0 3 3 0 8 0 fdescpl 528 462 0 431 3 0 3 3 0 8 0 filepl 160 1792 0 1501 13 0 13 13 0 8 0 lockfpl 104 22 0 17 1 0 1 1 0 8 0 lockfspl 48 11 0 6 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 81 0 67 1 0 1 1 0 8 0 zombiepl 144 432 0 431 1 0 1 1 0 8 0 processpl 1232 478 0 431 5 0 5 5 0 8 1 procpl 664 519 0 462 6 0 6 6 0 8 0 sockpl 752 175 0 137 5 0 5 5 0 8 0 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 13 0 0 2 0 2 2 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 149 0 0 10 0 10 10 0 8 0 bufpl 280 2371 0 105 162 0 162 162 0 8 0 anonpl 32 3683 0 0 30 0 30 30 0 246 0 amapchunkpl 152 9125 0 8629 20 0 20 20 0 158 0 amappl16 200 1376 0 1356 4 1 3 4 0 8 1 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 437 0 436 1 0 1 1 0 8 0 amappl13 176 122 0 110 1 0 1 1 0 8 0 amappl12 168 718 0 688 2 0 2 2 0 8 0 amappl11 160 18 0 18 1 1 0 1 0 8 0 amappl10 152 67 0 53 1 0 1 1 0 8 0 amappl9 144 302 0 302 1 1 0 1 0 8 0 amappl8 136 101 0 99 1 0 1 1 0 8 0 amappl7 128 147 0 133 1 0 1 1 0 8 0 amappl6 120 157 0 155 1 0 1 1 0 8 0 amappl5 112 91 0 81 1 0 1 1 0 8 0 amappl4 104 290 0 270 1 0 1 1 0 8 0 amappl3 96 1594 0 1478 3 0 3 3 0 8 0 amappl2 88 533 0 472 2 0 2 2 0 8 0 amappl1 80 9443 0 8834 15 0 15 15 0 8 2 amappl 88 2678 0 2510 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 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 462 0 431 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 462 0 431 1 0 1 1 0 8 0 vmmpekpl 168 5622 0 5589 2 0 2 2 0 8 0 vmmpepl 168 37267 0 35353 88 0 88 88 0 357 2 vmsppl 488 461 0 431 5 0 5 5 0 8 1 rwobjpl 80 13526 0 12491 24 0 24 24 0 8 1 pdppl 4096 931 0 862 101 26 75 85 0 8 6 pvpl 32 9893 0 0 80 0 80 80 0 265 0 pmappl 256 461 0 431 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 272 0 29 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(ffffffff8342dfde) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806073b968,2000,fffffd80097fd0d0,ffff800039bc06d0) at ffs_inode_alloc+0x94e ufs_makeinode(2000,fffffd806c7bc5f8,ffff800039bc08e8,ffff800039bc0918) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_mknod(ffff800039bc0790) at ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 VOP_MKNOD(fffffd806c7bc5f8,ffff800039bc08e8,ffff800039bc0918,ffff800039bc0818) at VOP_MKNOD+0x101 sys/kern/vfs_vops.c:121 domknodat(ffff8000ffff27e0,ffffff9c,200000000280,2000,1e5f) at domknodat+0x469 sys/kern/vfs_syscalls.c:1659 syscall(ffff800039bc0ab0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039bc0ab0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1a6936b0da0, count: -9 ddb{0}> machine ddbcpu 1