panic: ffs_valloc: dup alloc Stopped at db_enter+0x17: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND *375916 74810 0 0x2 0 0K syz-executor db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff84a364e0) at panic+0x296 sys/kern/subr_prf.c:198 ffs_inode_alloc(ffff80000182d730,41c0,ffff8000001195b0,ffff8000299c5dc0) at ffs_inode_alloc+0xd4b ufs_mkdir(ffff8000299c6080) at ufs_mkdir+0x2cd sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(ffff80000180dc00,ffff8000299c6290,ffff8000299c62c0,ffff8000299c6180) at VOP_MKDIR+0x1f3 sys/kern/vfs_vops.c:394 domkdirat(ffff800038ac0a88,ffffff9c,76b2ea6032f0,1c0) at domkdirat+0x26f sys/kern/vfs_syscalls.c:3060 syscall(ffff8000299c6550) at syscall+0x118e mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000299c6550) at syscall+0x118e sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b2ea6032b0, 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}> show kasan kasan: no report recorded this boot ddb{0}> trace db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff84a364e0) at panic+0x296 sys/kern/subr_prf.c:198 ffs_inode_alloc(ffff80000182d730,41c0,ffff8000001195b0,ffff8000299c5dc0) at ffs_inode_alloc+0xd4b ufs_mkdir(ffff8000299c6080) at ufs_mkdir+0x2cd sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(ffff80000180dc00,ffff8000299c6290,ffff8000299c62c0,ffff8000299c6180) at VOP_MKDIR+0x1f3 sys/kern/vfs_vops.c:394 domkdirat(ffff800038ac0a88,ffffff9c,76b2ea6032f0,1c0) at domkdirat+0x26f sys/kern/vfs_syscalls.c:3060 syscall(ffff8000299c6550) at syscall+0x118e mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000299c6550) at syscall+0x118e sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b2ea6032b0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000299c5b30 rbx 0xdfff908000000004 rdx 0 rcx 0xffffffff85214ff0 cpu_info_full_primary+0x1ff0 rax 0 r8 0xffffffff r9 0 r10 0x676 r11 0xffffffff8226a080 x86_bus_space_io_read_1 r12 0xffffffff85215e0f cpu_info_full_primary+0x2e0f r13 0xffffffff85215c10 cpu_info_full_primary+0x2c10 r14 0x1ffff00005338b70 r15 0x1 rip 0xffffffff81169c17 db_enter+0x17 cs 0x8 rflags 0x246 rsp 0xffff8000299c5b30 ss 0x10 db_enter+0x17: popq %rbp ddb{0}> show proc PROC (syz-executor) tid=375916 pid=74810 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800038ac0028,0xffff800038ac14f8 process=0xffff800038ab2bb8 user=0xffff8000299bb000, vmspace=0xffff800001c36030 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 2525 429974 12247 0 2 0 0 syz-executor *74810 375916 12785 0 7 0x2 0 syz-executor 32834 356528 48402 0 3 0x1 0x80 nanoslp syz-executor 32834 56448 48402 0 3 0x1 0x4000080 ttyout syz-executor 32834 80691 48402 0 3 0x1 0x4000080 fsleep syz-executor 53727 152145 12785 0 3 0x2 0 clonelk syz-executor 12247 50492 12785 0 2 0x2 0 syz-executor 73577 220072 12785 0 3 0x2 0x80 piperd syz-executor 20742 140196 12785 0 3 0x2 0x80 piperd syz-executor 3457 293289 12785 0 3 0x2 0x80 nanoslp syz-executor 59728 325473 12785 0 3 0x2 0x80 piperd syz-executor 48402 454753 12785 0 3 0x2 0x80 nanoslp syz-executor 12785 338032 8887 0 2 0x2 0 syz-executor 8887 374612 72533 0 3 0x100002 0x88 sigsusp ksh 72533 248883 32732 0 3 0x10 0x88 kqread sshd-session 32732 265179 62970 0 3 0x12 0x80 kqread sshd-session 25735 67388 1 0 3 0x100003 0x80 ttyin getty 62970 376555 1 0 3 0 0x88 kqread sshd 63055 250724 603 74 3 0x1100012 0x80 bpf pflogd 603 160907 1 0 3 0 0x80 sbwait pflogd 38911 23092 33322 73 3 0x1100010 0x80 kqread syslogd 33322 357053 1 0 3 0x100002 0x80 sbwait syslogd-parent 3215 38343 1 0 3 0x100000 0x80 kqread resolvd 82886 253871 54003 77 3 0x100012 0x80 kqread dhcpleased 16494 287822 54003 77 3 0x100012 0x80 kqread dhcpleased 54003 301323 1 0 3 0 0x80 kqread dhcpleased 4885 190284 0 0 3 0x14000 0x200 bored smr 38759 353934 0 0 2 0x14000 0x200 zerothread 84675 265003 0 0 3 0x14000 0x200 aiodoned aiodoned 39650 72350 0 0 3 0x14000 0x200 syncer update 56376 28835 0 0 3 0x14000 0x200 cleaner cleaner 17652 237548 0 0 3 0x14000 0x200 reaper reaper 64038 294826 0 0 3 0x14000 0x200 pgdaemon pagedaemon 26683 297768 0 0 3 0x14000 0x200 bored viomb 99307 125725 0 0 3 0x14000 0x40000200 acpi0 acpi0 95010 94111 0 0 7 0x14000 0x40000200 idle1 77247 144354 0 0 3 0x14000 0x200 bored softnet1 89143 378214 0 0 3 0x14000 0x200 bored softnet0 51014 427616 0 0 3 0x14000 0x200 smrbar systqmp 53015 63809 0 0 3 0x14000 0x200 bored systq 25869 295152 0 0 3 0x14000 0x200 tmoslp softclockmp 28631 216351 0 0 3 0x14000 0x40000200 tmoslp softclock 56858 154407 0 0 3 0x14000 0x40000200 idle0 1 150692 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 74810 (syz-executor) thread 0xffff800038ac0a88 (375916) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff85602680) #0 witness_lock+0x534 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x534 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 mi_switch+0x73e sys/kern/sched_bsd.c:443 #3 sleep_finish+0x3dc sys/kern/kern_synch.c:369 #4 biowait+0xe6 sys/kern/vfs_bio.c:1110 #5 ffs_vget+0x508 sys/ufs/ffs/ffs_vfsops.c:1249 #6 ffs_inode_alloc+0x579 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x2cd sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x1f3 sys/kern/vfs_vops.c:394 #9 domkdirat+0x26f sys/kern/vfs_syscalls.c:3060 #10 syscall+0x118e mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0x118e sys/arch/amd64/amd64/trap.c:791 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xffff800001cfab68) #0 witness_lock+0x534 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x534 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x4e4 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xf5 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0x186 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0xdc sys/ufs/ufs/ufs_ihash.c:152 #5 ffs_vget+0x2fc sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x579 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x2cd sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x1f3 sys/kern/vfs_vops.c:394 #9 domkdirat+0x26f sys/kern/vfs_syscalls.c:3060 #10 syscall+0x118e mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0x118e sys/arch/amd64/amd64/trap.c:791 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xffff80000182d7d0) #0 witness_lock+0x534 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x534 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x4e4 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xf5 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0x186 sys/kern/vfs_vops.c:527 #4 vn_lock+0xba sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x1da sys/kern/vfs_lookup.c:431 #6 namei+0xcba sys/kern/vfs_lookup.c:250 #7 domkdirat+0x15c sys/kern/vfs_syscalls.c:3045 #8 syscall+0x118e mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0x118e sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 Process 51014 (systqmp) thread 0xffff800045ffe298 (427616) shared rwlock systqmp r = 0 (0xffffffff854c5518) #0 witness_lock+0x534 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x534 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x1da sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11060 12248K 12464K 166960K 12311 0 pcb 18 26K 28K 166960K 40 0 rtable 258 21K 35K 166960K 476 0 pf 39 25K 36K 166960K 77 0 ifaddr 44 12K 14K 166960K 69 0 ifgroup 60 2K 2K 166960K 89 0 sysctl 3 1K 13K 166960K 8 0 counters 72 43K 45K 166960K 90 0 ioctlops 3 1K 197K 166960K 1507 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1375 88K 90K 166960K 1525 0 UFS quota 1 36K 36K 166960K 1 0 UFS mount 5 44K 44K 166960K 5 0 shm 2 2K 6K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 6 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 413K 166960K 11964 0 file desc 15 45K 117K 166960K 270 0 proc 126 131K 180K 166960K 678 0 subproc 81 10K 12K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 20K 20K 166960K 1 0 in_multi 99 7K 8K 166960K 143 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 7 0 ISOFS mount 1 36K 36K 166960K 1 0 MSDOSFS mount 1 20K 20K 166960K 1 0 ttys 55 384K 384K 166960K 55 0 exec 26 6K 18K 166960K 444 0 fusefs mount 1 36K 36K 166960K 1 0 tdb 3 1K 1K 166960K 3 0 VM swap 14 124K 124K 166960K 15 0 UVM amap 429 298K 378K 166960K 3909 0 UVM aobj 3 4K 4K 166960K 4 0 pinsyscall 132 232K 381K 166960K 1516 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 19 0K 2K 166960K 46 0 temp 482 9339K 9469K 166960K 4460 0 kqueue 14 44K 84K 166960K 41 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 42 0 39 1 0 1 1 0 8 0 rtentry 176 156 0 68 6 0 6 6 0 8 0 unpcb 144 147 0 130 4 3 1 4 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 11 0 7 1 0 1 1 0 8 0 arp 136 26 0 12 1 0 1 1 0 8 0 inpcb 328 163 0 153 5 3 2 4 0 8 1 nd6 152 37 0 19 1 0 1 1 0 8 0 kcovpl 48 13 0 6 1 0 1 1 0 8 0 ppxss 1192 4 0 4 1 1 0 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 pfrktable 1344 6 0 2 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 37 0 0 1 0 1 1 0 8 0 pfstkey 128 37 0 0 2 0 2 2 0 8 0 pfstate 448 37 0 0 5 0 5 5 0 8 0 pfrule 1360 24 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 633 0 222 30 4 26 29 0 8 0 art_table 40 634 0 222 5 0 5 5 0 8 0 art_node 32 156 0 76 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 72 4 0 0 1 0 1 1 0 8 0 shmpl 120 1 0 1 1 1 0 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1699 0 215 93 0 93 93 0 8 0 ffsino 296 1699 0 215 115 0 115 115 0 8 0 nchpl 144 1994 0 277 64 0 64 64 0 8 0 vnodes 216 1930 0 0 108 0 108 108 0 8 0 namei 1024 7330 0 7329 4 3 1 2 0 8 0 percpumem 16 61 0 11 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 47 0 22 2 0 2 2 0 8 0 scxspl 216 7258 0 7258 3 2 1 2 1 8 1 plimitpl 152 41 0 24 1 0 1 1 0 8 0 sigapl 424 564 0 521 7 1 6 7 0 8 0 knotepl 120 65 0 0 2 0 2 2 0 8 0 kqueuepl 224 54 0 45 1 0 1 1 0 8 0 pipepl 344 150 0 123 3 0 3 3 0 8 0 fdescpl 528 548 0 521 3 0 3 3 0 8 0 filepl 160 2217 0 2008 16 6 10 16 0 8 0 lockfpl 104 177 0 175 2 1 1 2 0 8 0 lockfspl 48 85 0 83 1 0 1 1 0 8 0 sessionpl 144 31 0 21 1 0 1 1 0 8 0 pgrppl 48 45 0 27 1 0 1 1 0 8 0 ucredpl 104 186 0 173 1 0 1 1 0 8 0 zombiepl 144 522 0 521 2 1 1 1 0 8 0 processpl 1240 564 0 521 5 1 4 5 0 8 0 procpl 664 676 0 631 6 1 5 6 0 8 0 sockpl 752 354 0 324 14 10 4 13 0 8 0 mcl64k 65536 8 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 mcl9k128 9344 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mextrefs 64 20 0 0 1 0 1 1 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 207 0 0 13 0 13 13 0 8 0 bufpl 272 2480 0 91 160 0 160 160 0 8 0 anonpl 32 5424 0 0 44 0 44 44 0 222 0 amapchunkpl 152 11040 0 10712 28 9 19 26 0 158 2 amappl16 200 1807 0 1792 5 3 2 5 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 464 0 463 1 0 1 1 0 8 0 amappl13 176 141 0 129 1 0 1 1 0 8 0 amappl12 168 824 0 800 2 0 2 2 0 8 0 amappl11 160 84 0 84 1 1 0 1 0 8 0 amappl10 152 112 0 100 1 0 1 1 0 8 0 amappl9 144 295 0 295 1 1 0 1 0 8 0 amappl8 136 107 0 104 1 0 1 1 0 8 0 amappl7 128 157 0 145 1 0 1 1 0 8 0 amappl6 120 155 0 154 1 0 1 1 0 8 0 amappl5 112 163 0 152 1 0 1 1 0 8 0 amappl4 104 303 0 285 1 0 1 1 0 8 0 amappl3 96 2128 0 2046 4 1 3 4 0 8 0 amappl2 88 466 0 409 2 0 2 2 0 8 0 amappl1 80 11291 0 10710 16 2 14 15 0 8 1 amappl 88 3136 0 3019 4 0 4 4 0 92 0 uvmvnodes 80 104 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 3 0 1 1 0 1 1 0 8 0 uaddrrnd 24 548 0 521 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 548 0 521 1 0 1 1 0 8 0 vmmpekpl 168 6240 0 6192 3 0 3 3 0 8 0 vmmpepl 168 44846 0 43202 90 6 84 87 0 357 4 vmsppl 488 547 0 521 7 2 5 5 0 8 0 rwobjpl 80 15999 0 15045 26 3 23 25 0 8 1 pdppl 4096 1105 0 1042 103 28 75 89 0 8 12 pvpl 32 12525 0 0 102 0 102 102 0 265 0 pmappl 256 547 0 521 4 1 3 3 0 8 0 extentpl 40 47 0 29 1 0 1 1 0 8 0 phpool 120 445 0 40 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff84a364e0) at panic+0x296 sys/kern/subr_prf.c:198 ffs_inode_alloc(ffff80000182d730,41c0,ffff8000001195b0,ffff8000299c5dc0) at ffs_inode_alloc+0xd4b ufs_mkdir(ffff8000299c6080) at ufs_mkdir+0x2cd sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(ffff80000180dc00,ffff8000299c6290,ffff8000299c62c0,ffff8000299c6180) at VOP_MKDIR+0x1f3 sys/kern/vfs_vops.c:394 domkdirat(ffff800038ac0a88,ffffff9c,76b2ea6032f0,1c0) at domkdirat+0x26f sys/kern/vfs_syscalls.c:3060 syscall(ffff8000299c6550) at syscall+0x118e mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000299c6550) at syscall+0x118e sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76b2ea6032b0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1f: addq $0x8,%rsp x86_ipi_db(ffff800028f93ff0) at x86_ipi_db+0x1f sys/arch/amd64/amd64/db_interface.c:412 x86_ipi_handler() at x86_ipi_handler+0xfd sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x65e sys/dev/acpi/acpicpu_x86.c:-1 sched_idle(ffff800028f93ff0) at sched_idle+0x742 sys/kern/kern_sched.c:204 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800028f93ff0) at x86_ipi_db+0x1f sys/arch/amd64/amd64/db_interface.c:412 x86_ipi_handler() at x86_ipi_handler+0xfd sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x65e sys/dev/acpi/acpicpu_x86.c:-1 sched_idle(ffff800028f93ff0) at sched_idle+0x742 sys/kern/kern_sched.c:204 end trace frame: 0x0, count: -5