panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 186450 18998 0 0 0 0 syz-executor *432858 83824 0 0x2 0 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349b02e) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806f64b978,41c0,fffffd80097fd820,ffff80003bfb1a78) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80003bfb1ae0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806f558978,ffff80003bfb1c40,ffff80003bfb1c70,ffff80003bfb1b70) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80003c3e1cb0,ffffff9c,7b1670c7b2d0,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff80003bfb1df0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bfb1df0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b1670c7b290, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: ffs_valloc: dup alloc ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349b02e) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806f64b978,41c0,fffffd80097fd820,ffff80003bfb1a78) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80003bfb1ae0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806f558978,ffff80003bfb1c40,ffff80003bfb1c70,ffff80003bfb1b70) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80003c3e1cb0,ffffff9c,7b1670c7b2d0,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff80003bfb1df0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bfb1df0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b1670c7b290, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003bfb17f0 rbx 0xffff80002999ee07 rdx 0 rcx 0xffff80003c3e1cb0 rax 0xffff80002999dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4452ff8ffce67e32 r11 0x29abe5839c1f03c9 r12 0xffff80002999ec08 r13 0 r14 0 r15 0x1 rip 0xffffffff82079915 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003bfb17e0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=432858 pid=83824 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c3e0a88,0xffff80003c3e1260 process=0xffff80003bfcf9e0 user=0xffff80003bfac000, vmspace=0xfffffd806c604208 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18998 186450 9519 0 7 0 syz-executor 67376 220345 93396 0 2 0 syz-executor 96204 394098 66150 0 2 0 syz-executor 47716 277791 37988 0 2 0 syz-executor *83824 432858 10283 0 7 0x2 syz-executor 76500 310958 25270 0 3 0x90 nanoslp syz-executor 76500 263440 25270 0 3 0x4000090 sbwait syz-executor 76500 70458 25270 0 3 0x4000090 fsleep syz-executor 4630 8734 37342 0 3 0x90 nanoslp syz-executor 4630 209137 37342 0 3 0x4000090 lockf syz-executor 4630 448757 37342 0 3 0x4000090 fsleep syz-executor 9519 384323 10283 0 2 0x2 syz-executor 25270 126466 10283 0 3 0x82 nanoslp syz-executor 93396 3471 10283 0 3 0x82 nanoslp syz-executor 37342 47285 10283 0 3 0x82 nanoslp syz-executor 66150 86579 10283 0 2 0x2 syz-executor 17241 242553 10283 0 2 0x2 syz-executor 37988 259411 10283 0 3 0x82 nanoslp syz-executor 10283 40548 76788 0 3 0x82 kqread syz-executor 76788 370722 43533 0 3 0x10008a sigsusp ksh 43533 332620 65740 0 3 0x98 kqread sshd-session 65740 247440 75531 0 3 0x92 kqread sshd-session 76319 18662 1 0 3 0x100083 ttyopn getty 75531 162802 1 0 3 0x88 kqread sshd 39006 250133 44770 74 3 0x1100092 bpf pflogd 44770 110591 1 0 3 0x80 sbwait pflogd 50036 209880 40221 73 3 0x1100090 kqread syslogd 40221 485897 1 0 3 0x100082 sbwait syslogd 41182 188979 1 0 3 0x100080 kqread resolvd 59976 413234 1058 77 3 0x100092 kqread dhcpleased 43668 227535 1058 77 3 0x100092 kqread dhcpleased 1058 490400 1 0 3 0x80 kqread dhcpleased 68709 60986 0 0 3 0x14200 bored smr 39395 473525 0 0 2 0x14200 zerothread 53927 243603 0 0 3 0x14200 aiodoned aiodoned 46939 508053 0 0 3 0x14200 syncer update 40658 325348 0 0 3 0x14200 cleaner cleaner 71268 15010 0 0 3 0x14200 reaper reaper 97003 476760 0 0 3 0x14200 pgdaemon pagedaemon 52296 467555 0 0 3 0x14200 bored viomb 87062 281427 0 0 3 0x40014200 acpi0 acpi0 64556 388842 0 0 3 0x40014200 idle1 59956 143812 0 0 3 0x14200 bored softnet1 30601 133287 0 0 3 0x14200 bored softnet0 50147 364408 0 0 3 0x14200 smrbar systqmp 61854 298668 0 0 3 0x14200 bored systq 95056 82147 0 0 3 0x14200 tmoslp softclockmp 68813 230706 0 0 3 0x40014200 tmoslp softclock 39440 113947 0 0 3 0x40014200 idle0 1 316451 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 18998 (syz-executor) thread 0xffff80003c3e0d20 (186450) Process 83824 (syz-executor) thread 0xffff80003c3e1cb0 (432858) Process 50147 (systqmp) thread 0xffff8000ffffe000 (364408) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11104 12182K 12478K 166960K 12402 0 pcb 19 12K 12K 166960K 60 0 rtable 194 7K 8K 166960K 409 0 pf 33 17K 18K 166960K 73 0 ifaddr 33 5K 7K 166960K 63 0 ifgroup 51 2K 2K 166960K 93 0 sysctl 1 1K 9K 166960K 7 0 counters 68 36K 38K 166960K 108 0 ioctlops 0 0K 4K 166960K 1515 0 iov 0 0K 16K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1296 82K 82K 166960K 1480 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 10 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 58K 89K 166960K 300 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 147K 166960K 568 0 subproc 63 3K 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 8 0 in_multi 66 4K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 390 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 206 166K 193K 166960K 4473 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 42 84K 100K 166960K 1458 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 11 0K 2K 166960K 39 0 temp 40 9112K 9178K 166960K 8186 0 kqueue 15 24K 34K 166960K 63 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 40 0 37 1 0 1 1 0 8 0 rtentry 176 120 0 41 6 0 6 6 0 8 0 unpcb 144 104 0 85 1 0 1 1 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpcb 736 51 0 46 1 0 1 1 0 8 0 arp 136 18 0 6 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 200 0 190 3 0 3 3 0 8 1 nd6 152 27 0 11 1 0 1 1 0 8 0 kcovpl 48 8 0 1 1 0 1 1 0 8 0 ppxss 1192 13 0 13 1 0 1 1 0 8 1 pppxif 1576 4 0 4 1 0 1 1 0 8 1 pffrent 40 1 0 1 1 0 1 1 0 8 1 pfosfp 40 1428 0 1428 5 0 5 5 0 8 5 pfosfpen 112 1428 0 1428 21 0 21 21 0 8 21 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 2 1 0 1 1 0 8 1 pfstitem 24 26 0 0 1 0 1 1 0 8 0 pfstkey 128 26 0 0 1 0 1 1 0 8 0 pfstate 448 25 0 0 3 0 3 3 0 8 0 pfrule 1360 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 489 0 122 29 0 29 29 0 8 4 art_table 40 491 0 122 5 0 5 5 0 8 0 art_node 32 120 0 37 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 64 8 0 2 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1883 0 415 93 0 93 93 0 8 0 ffsino 296 1883 0 415 114 0 114 114 0 8 0 nchpl 144 2324 0 624 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 0 1 1 0 8 1 vnodes 216 2030 0 0 113 0 113 113 0 8 0 namei 1024 7478 0 7477 2 0 2 2 0 8 1 percpumem 16 69 0 20 1 0 1 1 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 kstatmem 264 51 0 24 3 0 3 3 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 9678 0 9678 4 3 1 3 1 8 1 plimitpl 152 108 0 91 1 0 1 1 0 8 0 sigapl 424 617 0 570 7 0 7 7 0 8 1 knotepl 120 314 0 0 10 0 10 10 0 8 0 kqueuepl 224 76 0 64 1 0 1 1 0 8 0 pipepl 344 139 0 112 3 0 3 3 0 8 0 fdescpl 528 601 0 570 3 0 3 3 0 8 0 filepl 160 2678 0 2462 12 0 12 12 0 8 2 lockfpl 104 63 0 58 1 0 1 1 0 8 0 lockfspl 48 30 0 26 1 0 1 1 0 8 0 sessionpl 144 29 0 19 1 0 1 1 0 8 0 pgrppl 48 38 0 20 1 0 1 1 0 8 0 ucredpl 104 314 0 299 1 0 1 1 0 8 0 zombiepl 144 571 0 570 1 0 1 1 0 8 0 processpl 1232 617 0 570 5 0 5 5 0 8 0 procpl 664 879 0 828 6 0 6 6 0 8 0 sockpl 752 354 0 322 5 0 5 5 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 166 0 0 11 0 11 11 0 8 0 bufpl 280 3686 0 107 256 0 256 256 0 8 0 anonpl 32 7763 0 0 63 0 63 63 0 246 0 amapchunkpl 152 13209 0 12830 30 0 30 30 0 158 6 amappl16 200 2274 0 2251 16 0 16 16 0 8 9 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 436 0 435 1 0 1 1 0 8 0 amappl13 176 122 0 110 1 0 1 1 0 8 0 amappl12 168 847 0 822 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 63 0 48 1 0 1 1 0 8 0 amappl9 144 288 0 288 1 1 0 1 0 8 0 amappl8 136 98 0 96 1 0 1 1 0 8 0 amappl7 128 151 0 137 1 0 1 1 0 8 0 amappl6 120 292 0 290 1 0 1 1 0 8 0 amappl5 112 98 0 87 1 0 1 1 0 8 0 amappl4 104 301 0 283 1 0 1 1 0 8 0 amappl3 96 2533 0 2447 4 0 4 4 0 8 0 amappl2 88 543 0 481 2 0 2 2 0 8 0 amappl1 80 11079 0 10485 15 0 15 15 0 8 2 amappl 88 3716 0 3583 5 0 5 5 0 92 0 uvmvnodes 80 107 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 601 0 570 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 601 0 570 1 0 1 1 0 8 0 vmmpekpl 168 6811 0 6767 3 0 3 3 0 8 0 vmmpepl 168 47579 0 45743 99 0 99 99 0 357 7 vmsppl 488 600 0 570 5 0 5 5 0 8 1 rwobjpl 80 16653 0 15658 28 0 28 28 0 8 1 pdppl 4096 1209 0 1140 95 24 71 83 0 8 2 pvpl 32 13810 0 0 112 0 112 112 0 265 0 pmappl 256 600 0 570 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 268 0 27 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83984ff0) 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 __mp_lock(ffffffff83a9ef40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a9ef40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 pmap_enter(fffffd806c63ba00,774908286000,6c63a000,1,21) at pmap_enter+0xc3f pmap_unmap_ptes sys/arch/amd64/amd64/pmap.c:456 [inline] pmap_enter(fffffd806c63ba00,774908286000,6c63a000,1,21) at pmap_enter+0xc3f sys/arch/amd64/amd64/pmap.c:2954 uvm_fault_upper(ffff80003bfcaf70,ffff80003bfcafa8,ffff80003bfcae70) at uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1131 uvm_fault(fffffd806c6047c0,774908286000,0,1) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635 upageflttrap(ffff80003bfcb110,774908286220) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003bfcb110) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x774908286250, count: 2 ddb{0}> trace x86_ipi_db(ffffffff83984ff0) 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 __mp_lock(ffffffff83a9ef40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a9ef40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 pmap_enter(fffffd806c63ba00,774908286000,6c63a000,1,21) at pmap_enter+0xc3f pmap_unmap_ptes sys/arch/amd64/amd64/pmap.c:456 [inline] pmap_enter(fffffd806c63ba00,774908286000,6c63a000,1,21) at pmap_enter+0xc3f sys/arch/amd64/amd64/pmap.c:2954 uvm_fault_upper(ffff80003bfcaf70,ffff80003bfcafa8,ffff80003bfcae70) at uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1131 uvm_fault(fffffd806c6047c0,774908286000,0,1) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635 upageflttrap(ffff80003bfcb110,774908286220) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003bfcb110) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x774908286250, count: -13 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349b02e) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806f64b978,41c0,fffffd80097fd820,ffff80003bfb1a78) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80003bfb1ae0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806f558978,ffff80003bfb1c40,ffff80003bfb1c70,ffff80003bfb1b70) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80003c3e1cb0,ffffff9c,7b1670c7b2d0,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff80003bfb1df0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bfb1df0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b1670c7b290, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349b02e) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806f64b978,41c0,fffffd80097fd820,ffff80003bfb1a78) at ffs_inode_alloc+0x94e ufs_mkdir(ffff80003bfb1ae0) at ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 VOP_MKDIR(fffffd806f558978,ffff80003bfb1c40,ffff80003bfb1c70,ffff80003bfb1b70) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80003c3e1cb0,ffffff9c,7b1670c7b2d0,1c0) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3149 syscall(ffff80003bfb1df0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bfb1df0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b1670c7b290, count: -8