panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 955 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 357181 20353 0 0 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834b75bd) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f735b,ffffffff835078cd,3bb,ffffffff83530857) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c3b3778,ffffffff834ad9d2) at refcnt_finalize+0x1db sys/kern/kern_synch.c:956 pppx_if_destroy(285b9e,ffff80003c3b3770) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(285b9e,41,2000,ffff80002a23c800) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003c3d75a0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffff08076c897c0,41,fffff080097fd0d0,ffff80002a23c800) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffff0806f327468,ffff80002a23c800) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffff0806f327468,ffff80002a23c800) at vn_closefile+0x12b sys/kern/vfs_vnops.c:621 fdrop(fffff0806f327468,ffff80002a23c800) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffff0806f327468,ffff80002a23c800) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a23c800) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff80002a23c800,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a23c800,ffff80003c3d7910,ffff80003c3d7860) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80003c3d7900, count: 0 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: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 955 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834b75bd) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f735b,ffffffff835078cd,3bb,ffffffff83530857) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c3b3778,ffffffff834ad9d2) at refcnt_finalize+0x1db sys/kern/kern_synch.c:956 pppx_if_destroy(285b9e,ffff80003c3b3770) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(285b9e,41,2000,ffff80002a23c800) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80003c3d75a0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffff08076c897c0,41,fffff080097fd0d0,ffff80002a23c800) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffff0806f327468,ffff80002a23c800) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffff0806f327468,ffff80002a23c800) at vn_closefile+0x12b sys/kern/vfs_vnops.c:621 fdrop(fffff0806f327468,ffff80002a23c800) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffff0806f327468,ffff80002a23c800) at closef+0x192 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a23c800) at fdfree+0x116 sys/kern/kern_descrip.c:1196 exit1(ffff80002a23c800,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a23c800,ffff80003c3d7910,ffff80003c3d7860) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3d7910) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d7910) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d2ad3768ce0, count: -16 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c3d7370 rbx 0xffff80002999ee07 rdx 0 rcx 0xffff80002a23c800 rax 0xffff80002999dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x868da7069abf7d85 r11 0x2f917a3b5c28928e r12 0xffff80002999ec08 r13 0 r14 0 r15 0x1 rip 0xffffffff821d1f05 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c3d7360 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=37739 pid=902 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a23c800 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800030f90a90,0xffff80002a23d270 process=0xffff80002a22c4f8 user=0xffff80003c3d2000, vmspace=0xfffff08077c4a9a0 estcpu=31, cpticks=6, pctcpu=0.5, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20353 357181 34550 0 7 0 syz-executor 20611 300615 31402 0 2 0 syz-executor 49805 430658 15190 0 2 0x2 ifconfig 57652 230748 16576 0 2 0x100002 sh 15190 176347 92578 0 3 0x10008a sigsusp sh 92970 391548 66711 0 2 0 syz-executor 92970 422388 66711 0 3 0x4000000 smrbar syz-executor 92970 34229 66711 0 3 0x4000080 fsleep syz-executor 16576 141602 47063 0 3 0x82 wait syz-executor 92578 163554 47063 0 3 0x82 wait syz-executor 6864 39370 0 0 3 0x14280 nfsidl nfsio 61604 147609 0 0 3 0x14280 nfsidl nfsio 24827 227121 0 0 3 0x14280 nfsidl nfsio 32080 424171 0 0 3 0x14280 nfsidl nfsio 42102 85826 0 0 3 0x14280 nfsidl nfsio 38725 6007 0 0 3 0x14280 nfsidl nfsio 27449 14337 0 0 3 0x14280 nfsidl nfsio 58564 333639 0 0 3 0x14280 nfsidl nfsio 54679 228636 0 0 3 0x14280 nfsidl nfsio 45189 294683 0 0 3 0x14280 nfsidl nfsio 64970 378477 0 0 3 0x14280 nfsidl nfsio 51882 302500 0 0 3 0x14280 nfsidl nfsio 16228 79716 0 0 3 0x14280 nfsidl nfsio 28636 152273 0 0 3 0x14280 nfsidl nfsio 26253 473683 0 0 3 0x14280 nfsidl nfsio 403 206537 0 0 3 0x14280 nfsidl nfsio 6506 501290 0 0 3 0x14280 nfsidl nfsio 44631 143230 0 0 3 0x14280 nfsidl nfsio 82724 295812 0 0 3 0x14280 nfsidl nfsio 12394 505080 0 0 3 0x14280 nfsidl nfsio 31402 280559 47063 0 3 0x82 nanoslp syz-executor 66186 215190 47063 0 3 0x82 piperd syz-executor 58659 501119 47063 0 3 0x82 nanoslp syz-executor 66711 229938 47063 0 3 0x82 nanoslp syz-executor 12586 365982 47063 0 3 0x2 biowait syz-executor 34550 51496 47063 0 3 0x82 nanoslp syz-executor 47063 124184 1 0 2 0x2 syz-executor 62531 101487 0 0 3 0x14200 bored smr 84368 251658 0 0 2 0x14200 zerothread 1679 118435 0 0 3 0x14200 aiodoned aiodoned 59578 152776 0 0 3 0x14200 syncer update 3149 143697 0 0 3 0x14200 cleaner cleaner 19688 424302 0 0 3 0x14200 reaper reaper 57781 447602 0 0 3 0x14200 pgdaemon pagedaemon 27025 327918 0 0 3 0x14200 bored viomb 51378 143991 0 0 3 0x40014200 acpi0 acpi0 6194 22408 0 0 3 0x40014200 idle1 5553 201198 0 0 3 0x14200 bored softnet1 43256 108243 0 0 3 0x14200 bored softnet0 43568 165978 0 0 3 0x14200 smrbar systqmp 32900 398382 0 0 3 0x14200 bored systq 63539 468147 0 0 3 0x14200 tmoslp softclockmp 49754 113736 0 0 3 0x40014200 tmoslp softclock 90227 257063 0 0 3 0x40014200 idle0 1 460166 0 0 4 0x58000082 init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 12586 (syz-executor) thread 0xffff8000ffffc7d0 (365982) exclusive rrwlock inode r = 0 (0xfffff0806e5d9120) #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:3062 #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 (0xfffff0806d553b18) #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+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 #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 43568 (systqmp) thread 0xffff8000ffffe7c8 (165978) shared rwlock systqmp r = 0 (0xffffffff83943138) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11093 12216K 12404K 166960K 12987 0 pcb 17 14K 16K 166960K 226 0 rtable 179 12K 13K 166960K 519 0 pf 41 19K 24K 166960K 165 0 ifaddr 34 5K 7K 166960K 86 0 ifgroup 52 2K 2K 166960K 130 0 sysctl 4 1K 9K 166960K 14 0 counters 70 36K 37K 166960K 136 0 ioctlops 0 0K 4K 166960K 1688 0 iov 0 0K 20K 166960K 34 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1475 93K 93K 166960K 2195 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 20K 32K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 31 0 dirhash 12 2K 3K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 61K 93K 166960K 793 0 sigio 0 0K 0K 166960K 8 0 proc 20 33K 180K 166960K 726 0 subproc 72 4K 4K 166960K 109 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 70 0 in_multi 67 5K 6K 166960K 146 0 ether_multi 1 0K 0K 166960K 8 0 mrt 1 0K 0K 166960K 30 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 493 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 98 79K 176K 166960K 8825 0 UVM aobj 36 2K 2K 166960K 37 0 pinsyscall 17 34K 104K 166960K 2081 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 11 0K 1K 166960K 56 0 temp 54 9118K 9175K 166960K 39838 0 kqueue 1 2K 34K 166960K 158 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 72 0 72 1 0 1 1 0 8 1 rtentry 176 152 0 84 5 0 5 5 0 8 0 unpcb 144 588 0 588 4 1 3 3 0 8 3 syncache 336 10 0 10 1 1 0 1 0 8 0 tcpcb 736 222 0 221 4 3 1 4 0 8 0 arp 136 23 0 11 1 0 1 1 0 8 0 inpcb 328 772 0 770 7 3 4 7 0 8 3 nd6 152 34 0 19 1 0 1 1 0 8 0 pkpcb 40 70 0 70 1 1 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1192 22 0 21 1 0 1 1 0 8 0 pppxif 1576 5 0 4 2 1 1 1 0 8 0 pfstscr 40 75 0 73 1 0 1 1 0 8 0 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 1 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 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 10 0 7 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 59 0 15 1 0 1 1 0 8 0 pfstkey 128 197 0 153 2 0 2 2 0 8 0 pfstate 448 130 0 86 6 0 6 6 0 8 0 pfrule 1360 29 0 23 2 1 1 2 0 8 0 rttmr 136 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 745 0 399 29 2 27 29 0 8 2 art_table 40 747 0 399 5 0 5 5 0 8 0 art_node 32 152 0 91 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 72 27 0 17 1 0 1 1 0 8 0 shmpl 112 34 0 1 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2723 0 1247 93 0 93 93 0 8 0 ffsino 296 2723 0 1247 115 0 115 115 0 8 0 nchpl 144 3804 0 2097 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 vnodes 216 3461 0 0 193 0 193 193 0 8 0 namei 1024 12648 0 12647 2 1 1 2 0 8 0 percpumem 16 83 0 33 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 75 0 50 3 1 2 3 0 8 0 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 16834 0 16833 13 5 8 8 1 8 7 plimitpl 152 184 0 166 1 0 1 1 0 8 0 sigapl 424 1140 0 1073 8 0 8 8 0 8 0 knotepl 120 701 0 0 22 0 22 22 0 8 0 kqueuepl 224 236 0 235 3 2 1 3 0 8 0 pipepl 344 177 0 150 3 0 3 3 0 8 0 fdescpl 528 1103 0 1085 3 0 3 3 0 8 0 filepl 160 6183 0 6030 18 3 15 18 0 8 5 lockfpl 104 310 0 309 1 0 1 1 0 8 0 lockfspl 48 134 0 133 1 0 1 1 0 8 0 sessionpl 144 53 0 44 1 0 1 1 0 8 0 pgrppl 48 70 0 53 1 0 1 1 0 8 0 ucredpl 104 965 0 951 1 0 1 1 0 8 0 zombiepl 144 1087 0 1073 1 0 1 1 0 8 0 processpl 1232 1140 0 1073 6 0 6 6 0 8 0 procpl 664 2184 0 2115 8 0 8 8 0 8 1 sosppl 176 3 0 3 1 1 0 1 0 8 0 sockpl 752 1528 0 1526 11 3 8 11 0 8 7 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 11 0 0 2 0 2 2 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 212 0 0 13 0 13 13 0 8 0 bufpl 272 7002 0 871 409 0 409 409 0 8 0 anonpl 32 7677 0 0 62 0 62 62 0 246 0 amapchunkpl 152 28258 0 28017 37 9 28 36 0 158 13 amappl16 200 2485 0 2467 21 14 7 15 0 8 4 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 466 0 464 1 0 1 1 0 8 0 amappl13 176 143 0 143 1 0 1 1 0 8 1 amappl12 168 1374 0 1360 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 65 0 65 1 0 1 1 0 8 1 amappl9 144 275 0 275 1 1 0 1 0 8 0 amappl8 136 109 0 107 1 0 1 1 0 8 0 amappl7 128 174 0 172 1 0 1 1 0 8 0 amappl6 120 185 0 181 1 0 1 1 0 8 0 amappl5 112 121 0 120 1 0 1 1 0 8 0 amappl4 104 330 0 327 1 0 1 1 0 8 0 amappl3 96 5787 0 5732 4 0 4 4 0 8 0 amappl2 88 638 0 629 2 0 2 2 0 8 0 amappl1 80 15501 0 15409 17 3 14 17 0 8 5 amappl 88 7850 0 7764 5 0 5 5 0 92 0 uvmvnodes 80 125 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 128 254 0 254 2 2 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 36 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1103 0 1085 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1103 0 1085 1 0 1 1 0 8 0 vmmpekpl 168 11324 0 11278 3 0 3 3 0 8 0 vmmpepl 168 79460 0 78796 101 7 94 101 0 357 52 vmsppl 488 1102 0 1085 5 1 4 5 0 8 0 rwobjpl 80 24123 0 23695 28 2 26 27 0 8 2 pdppl 4096 2213 0 2170 113 66 47 85 0 8 4 pvpl 32 14446 0 0 118 1 117 117 0 265 0 pmappl 256 1102 0 1085 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 707 0 76 19 0 19 19 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838d9ff0) 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(ffffffff839e6d40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839e6d40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a24e720,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839e6d40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839e6d40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80002a24e8f0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a24e8f0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7edfbaf2cdc0, count: 6 ddb{0}>