panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *417892 61370 0 0x2 0 0K syz-executor 133806 76622 0 0 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83436fb8) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806f6a9aa0,41c0,fffffd80097fd7b8,ffff80003c3d0c78) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80003c3d0ce0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd80701c41e0,ffff80003c3d0e40,ffff80003c3d0e70,ffff80003c3d0d70) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80003c3d2a80,ffffff9c,74ba599f3e60,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 syscall(ffff80003c3d0ff0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d0ff0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ba599f3e20, 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}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83436fb8) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806f6a9aa0,41c0,fffffd80097fd7b8,ffff80003c3d0c78) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80003c3d0ce0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd80701c41e0,ffff80003c3d0e40,ffff80003c3d0e70,ffff80003c3d0d70) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80003c3d2a80,ffffff9c,74ba599f3e60,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 syscall(ffff80003c3d0ff0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d0ff0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ba599f3e20, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c3d09f0 rbx 0xffffffff83941e07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff80003c3d2a80 rax 0xffffffff83940ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc118b422342f3789 r11 0x64a41d7914deaaef r12 0xffffffff83941c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff81238435 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c3d09e0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=417892 pid=61370 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c3d3ca8,0xffff80003c3d3258 process=0xffff80002a39d358 user=0xffff80003c3cc000, vmspace=0xfffffd800f8b1d78 estcpu=15, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74472 87250 96797 0 2 0x1 syz-executor 87891 325020 96797 0 2 0x1 syz-executor *61370 417892 96797 0 7 0x2 syz-executor 25804 362287 31718 0 2 0 syz-executor 25804 204817 31718 0 2 0x4000000 syz-executor 25804 463030 31718 0 3 0x4000080 fsleep syz-executor 25804 77580 31718 0 2 0x4000000 syz-executor 76622 133806 32110 0 7 0 syz-executor 76622 238738 32110 0 2 0x4000001 syz-executor 76622 385882 32110 0 3 0x4000080 fsleep syz-executor 37500 139095 96797 0 2 0x2 syz-executor 39546 408360 96797 0 2 0x2 syz-executor 89880 340882 96797 0 2 0x2 syz-executor 32110 252684 96797 0 2 0x3 syz-executor 31718 383950 96797 0 3 0x82 nanoslp syz-executor 96797 383834 91067 0 3 0x82 kqread syz-executor 91067 297258 75921 0 3 0x10008a sigsusp ksh 75921 128029 47377 0 3 0x98 kqread sshd-session 47377 440267 5879 0 3 0x92 kqread sshd-session 37986 385948 1 0 3 0x100083 ttyin getty 5879 519069 1 0 3 0x88 kqread sshd 93618 354042 30844 74 3 0x1100092 bpf pflogd 30844 132236 1 0 3 0x80 sbwait pflogd 74962 100238 43244 73 3 0x1100090 kqread syslogd 43244 367681 1 0 3 0x100082 sbwait syslogd 79146 418547 1 0 3 0x100080 kqread resolvd 2031 379089 20445 77 3 0x100092 kqread dhcpleased 28453 160131 20445 77 3 0x100092 kqread dhcpleased 20445 455382 1 0 3 0x80 kqread dhcpleased 98690 517018 0 0 3 0x14200 bored smr 33025 520361 0 0 2 0x14200 zerothread 14460 446079 0 0 3 0x14200 aiodoned aiodoned 77175 286406 0 0 3 0x14200 syncer update 29305 57457 0 0 3 0x14200 cleaner cleaner 37573 309979 0 0 3 0x14200 reaper reaper 73799 437776 0 0 3 0x14200 pgdaemon pagedaemon 50080 371638 0 0 3 0x14200 bored viomb 8652 175406 0 0 3 0x40014200 acpi0 acpi0 73726 121300 0 0 3 0x40014200 idle1 12491 432922 0 0 3 0x14200 bored softnet1 99715 151892 0 0 3 0x14200 bored softnet0 55941 515243 0 0 3 0x14200 smrbar systqmp 97443 231139 0 0 3 0x14200 bored systq 3378 52319 0 0 3 0x14200 tmoslp softclockmp 80413 401565 0 0 3 0x40014200 tmoslp softclock 31790 405695 0 0 3 0x40014200 idle0 1 8430 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 61370 (syz-executor) thread 0xffff80003c3d2a80 (417892) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839d2f80) #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 malloc+0xe3 sys/kern/kern_malloc.c:175 #3 checkalias+0x21c sys/kern/vfs_subr.c:594 #4 ffs_vinit+0x111 sys/ufs/ffs/ffs_subr.c:-1 #5 ffs_vget+0x40e sys/ufs/ffs/ffs_vfsops.c:1285 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 #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 (0xfffffd806c6a3b28) #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_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 #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 (0xfffffd806f6a9b40) #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+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3128 #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 Process 39546 (syz-executor) thread 0xffff8000fffee2b0 (408360) exclusive rrwlock inode r = 0 (0xfffffd806c6a30c0) #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 sys_getdents+0x254 sys/kern/vfs_syscalls.c:3198 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 Process 55941 (systqmp) thread 0xffff8000ffffecf8 (515243) shared rwlock systqmp r = 0 (0xffffffff839253f8) #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 11080 12098K 12315K 166960K 12437 0 pcb 17 12K 12K 166960K 25 0 rtable 173 5K 7K 166960K 371 0 pf 29 16K 20K 166960K 61 0 ifaddr 31 5K 8K 166960K 54 0 ifgroup 43 2K 2K 166960K 71 0 sysctl 1 1K 9K 166960K 5 0 counters 64 36K 37K 166960K 84 0 ioctlops 0 0K 4K 166960K 1503 0 iov 0 0K 2K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1295 81K 82K 166960K 1433 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 8 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 12 32K 93K 166960K 223 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 164K 166960K 578 0 subproc 45 2K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 4 0 in_multi 66 4K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 211 943K 943K 166960K 211 0 exec 0 0K 1K 166960K 383 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 183 133K 168K 166960K 3840 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 37 74K 103K 166960K 1362 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 9 0K 2K 166960K 33 0 temp 25 9074K 9140K 166960K 12107 0 kqueue 13 20K 23K 166960K 34 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 41 0 38 1 0 1 1 0 8 0 rtentry 176 117 0 40 6 0 6 6 0 8 1 unpcb 144 79 0 62 1 0 1 1 0 8 0 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 29 0 25 1 0 1 1 0 8 0 arp 136 19 0 7 1 0 1 1 0 8 0 inpcb 328 111 0 104 2 0 2 2 0 8 1 nd6 152 25 0 10 1 0 1 1 0 8 0 kcovpl 48 9 0 4 1 0 1 1 0 8 0 ppxss 1192 5 0 5 1 0 1 1 0 8 1 pppxif 1576 2 0 2 1 1 0 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 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 29 0 0 1 0 1 1 0 8 0 pfstkey 128 29 0 0 1 0 1 1 0 8 0 pfstate 448 28 0 0 4 0 4 4 0 8 0 pfrule 1360 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 471 0 104 29 0 29 29 0 8 4 art_table 40 472 0 104 5 0 5 5 0 8 0 art_node 32 117 0 28 1 0 1 1 0 8 0 semapl 112 7 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1721 0 253 93 0 93 93 0 8 0 ffsino 296 1722 0 254 114 0 114 114 0 8 0 nchpl 144 2030 0 334 64 0 64 64 0 8 0 vnodes 216 1853 0 0 103 0 103 103 0 8 0 namei 1024 6467 0 6466 2 1 1 2 0 8 0 percpumem 16 57 0 10 1 0 1 1 0 8 0 kstatmem 264 36 0 16 4 1 3 3 0 8 1 scxspl 216 7014 0 7014 4 3 1 3 1 8 1 plimitpl 152 38 0 23 1 0 1 1 0 8 0 sigapl 424 533 0 491 7 1 6 7 0 8 1 knotepl 120 55 0 0 2 0 2 2 0 8 0 kqueuepl 224 42 0 33 1 0 1 1 0 8 0 pipepl 344 139 0 109 3 0 3 3 0 8 0 fdescpl 528 517 0 491 3 0 3 3 0 8 1 filepl 160 2162 0 1977 13 0 13 13 0 8 3 lockfpl 104 29 0 27 1 0 1 1 0 8 0 lockfspl 48 13 0 11 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 226 0 213 1 0 1 1 0 8 0 zombiepl 144 528 0 528 2 1 1 1 0 8 1 processpl 1232 533 0 491 5 1 4 5 0 8 0 procpl 664 694 0 645 6 0 6 6 0 8 1 sockpl 752 231 0 204 6 1 5 5 0 8 2 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 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 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 141 0 0 9 0 9 9 0 8 0 bufpl 280 2576 0 105 177 0 177 177 0 8 0 anonpl 32 5455 0 0 44 0 44 44 0 246 0 amapchunkpl 152 11408 0 11061 26 4 22 26 0 158 7 amappl16 200 2011 0 1995 5 3 2 5 0 8 0 amappl15 192 4 0 3 1 0 1 1 0 8 0 amappl14 184 434 0 433 1 0 1 1 0 8 0 amappl13 176 120 0 108 1 0 1 1 0 8 0 amappl12 168 771 0 747 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 65 0 51 1 0 1 1 0 8 0 amappl9 144 275 0 275 1 1 0 1 0 8 0 amappl8 136 102 0 100 1 0 1 1 0 8 0 amappl7 128 163 0 150 1 0 1 1 0 8 0 amappl6 120 258 0 257 1 0 1 1 0 8 0 amappl5 112 98 0 87 1 0 1 1 0 8 0 amappl4 104 292 0 269 1 0 1 1 0 8 0 amappl3 96 2002 0 1923 4 0 4 4 0 8 1 amappl2 88 524 0 462 2 0 2 2 0 8 0 amappl1 80 9532 0 8963 14 1 13 14 0 8 0 amappl 88 3110 0 2995 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 517 0 491 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 517 0 491 1 0 1 1 0 8 0 vmmpekpl 168 6082 0 6020 3 0 3 3 0 8 0 vmmpepl 168 40927 0 39283 89 2 87 87 0 357 9 vmsppl 488 516 0 491 5 1 4 5 0 8 0 rwobjpl 80 14651 0 13719 23 1 22 23 0 8 0 pdppl 4096 1041 0 982 101 36 65 85 0 8 6 pvpl 32 12736 0 0 103 0 103 103 0 265 0 pmappl 256 516 0 491 3 0 3 3 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 275 0 41 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(ffffffff83436fb8) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806f6a9aa0,41c0,fffffd80097fd7b8,ffff80003c3d0c78) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80003c3d0ce0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd80701c41e0,ffff80003c3d0e40,ffff80003c3d0e70,ffff80003c3d0d70) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80003c3d2a80,ffffff9c,74ba599f3e60,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 syscall(ffff80003c3d0ff0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d0ff0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ba599f3e20, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299bdff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x7d76b4811660, count: 12 ddb{1}> trace x86_ipi_db(ffff8000299bdff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x7d76b4811660, count: -3