panic: assertwaitok: non-zero mutex count: 1 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 466156 49436 0 0 0x4000000 1 syz-executor1470090262 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827bb889) at panic+0x17b sys/kern/subr_prf.c:198 assertwaitok() at assertwaitok+0x132 sys/kern/subr_xxx.c:163 mi_switch() at mi_switch+0x46 sys/kern/sched_bsd.c:360 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 rwsleep(fffffd806e879e88,ffffffff82bf3560,118,ffffffff827aae8e,0) at rwsleep+0xab sys/kern/kern_synch.c:300 sosleep_nsec(fffffd806e879d68,fffffd806e879e88,118,ffffffff827aae8e,ffffffffffffffff) at sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 sblock(fffffd806e879d68,fffffd806e879e38,1) at sblock+0x1c4 sys/kern/uipc_socket2.c:514 soreceive(fffffd806e879d68,ffff80002a22be88,ffff80002a22be48,0,0,ffff80002a22c00c,2c3e90ef4a169b37) at soreceive+0x5fe sys/kern/uipc_socket.c:837 recvit(ffff80002a1862a0,3,ffff80002a22bfe0,0,ffff80002a22bfd8) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a1862a0,ffff80002a22c0e0,ffff80002a22c130) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a22c1b0) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a22c1b0) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x48432e6640, count: 2 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: assertwaitok: non-zero mutex count: 1 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827bb889) at panic+0x17b sys/kern/subr_prf.c:198 assertwaitok() at assertwaitok+0x132 sys/kern/subr_xxx.c:163 mi_switch() at mi_switch+0x46 sys/kern/sched_bsd.c:360 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 rwsleep(fffffd806e879e88,ffffffff82bf3560,118,ffffffff827aae8e,0) at rwsleep+0xab sys/kern/kern_synch.c:300 sosleep_nsec(fffffd806e879d68,fffffd806e879e88,118,ffffffff827aae8e,ffffffffffffffff) at sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 sblock(fffffd806e879d68,fffffd806e879e38,1) at sblock+0x1c4 sys/kern/uipc_socket2.c:514 soreceive(fffffd806e879d68,ffff80002a22be88,ffff80002a22be48,0,0,ffff80002a22c00c,2c3e90ef4a169b37) at soreceive+0x5fe sys/kern/uipc_socket.c:837 recvit(ffff80002a1862a0,3,ffff80002a22bfe0,0,ffff80002a22bfd8) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a1862a0,ffff80002a22c0e0,ffff80002a22c130) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a22c1b0) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a22c1b0) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x48432e6640, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a22b9f0 rbx 0xffffffff82b7eba7 cpu_info_full_primary+0x2ba7 rdx 0x3fd rcx 0 rax 0x2d r8 0x101010101010101 r9 0x8080808080808080 r10 0xc789f94a979f8bfc r11 0x2df57e9e338ad651 r12 0xffffffff82b7e9a8 cpu_info_full_primary+0x29a8 r13 0 r14 0 r15 0x1 rip 0xffffffff81b102fc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002a22b9e0 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor1470090262) tid=31198 pid=49436 tcnt=4 stat=sleep flags process=0 proc=4000080 runpri=24, usrpri=53, slppri=24, nice=20 wchan=0xfffffd806e879e88, wmesg=netlck, ps_single=0x0 forw=0x0, list=0xffff80002a185aa8,0xffff80002a186558 process=0xffff8000ffff6190 user=0xffff80002a227000, vmspace=0xfffffd807eff93a0 estcpu=3, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49436 369212 69515 0 3 0x80 nanoslp syz-executor1470090262 49436 466156 69515 0 7 0x4000000 syz-executor1470090262 *49436 31198 69515 0 3 0x4000080 netlck syz-executor1470090262 49436 253359 69515 0 3 0x4000080 fsleep syz-executor1470090262 69515 319613 77632 0 3 0x82 nanoslp syz-executor1470090262 77632 405956 60447 0 3 0x10008a sigsusp ksh 60447 486606 38809 0 3 0x9a kqread sshd 47164 323829 1 0 3 0x100083 ttyin getty 38809 95761 1 0 3 0x88 kqread sshd 94900 440979 97728 73 3 0x1100090 kqread syslogd 97728 196965 1 0 3 0x100082 netio syslogd 77601 106748 1 0 3 0x100080 kqread resolvd 35916 504448 51871 77 3 0x100092 kqread dhcpleased 37579 418376 51871 77 3 0x100092 kqread dhcpleased 51871 195282 1 0 3 0x80 kqread dhcpleased 63675 54513 0 0 3 0x14200 bored smr 2813 390673 0 0 3 0x14200 pgzero zerothread 95329 105500 0 0 3 0x14200 aiodoned aiodoned 8965 523235 0 0 3 0x14200 syncer update 7107 379343 0 0 3 0x14200 cleaner cleaner 72137 460398 0 0 3 0x14200 reaper reaper 66078 150659 0 0 3 0x14200 pgdaemon pagedaemon 93831 11884 0 0 3 0x14200 bored viomb 83736 312307 0 0 3 0x40014200 acpi0 acpi0 4270 478632 0 0 3 0x40014200 idle1 54986 303955 0 0 3 0x14200 bored softnet3 1198 456182 0 0 3 0x14200 bored softnet2 39624 335984 0 0 3 0x14200 bored softnet1 32558 391435 0 0 3 0x14200 bored softnet0 32929 374629 0 0 3 0x14200 bored systqmp 98548 264436 0 0 3 0x14200 bored systq 95564 431007 0 0 3 0x14200 tmoslp softclockmp 35125 304174 0 0 3 0x40014200 tmoslp softclock 11722 478060 0 0 3 0x40014200 idle0 1 141077 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff82d68d78) #0 witness_lock+0x447 #1 sleep_finish+0x142 sys/kern/kern_synch.c:398 #2 rwsleep+0xab sys/kern/kern_synch.c:300 #3 sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 #4 sblock+0x1c4 sys/kern/uipc_socket2.c:514 #5 soreceive+0x5fe sys/kern/uipc_socket.c:837 #6 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #7 sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 #8 syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] #8 syscall+0x50f sys/arch/amd64/amd64/trap.c:606 #9 Xsyscall+0x128 exclusive mutex &inp->inp_mtx r = 0 (0xfffffd806f29f510) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 soreceive+0x5dc pru_lock sys/sys/protosw.h:288 [inline] #3 soreceive+0x5dc sys/kern/uipc_socket.c:911 #4 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #5 sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 #6 syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] #6 syscall+0x50f sys/arch/amd64/amd64/trap.c:606 #7 Xsyscall+0x128 Process 49436 (syz-executor1470090262) thread 0xffff80002a185aa8 (466156) exclusive rwlock solock r = 0 (0xfffffd806e879d80) #0 witness_lock+0x447 #1 soreceive+0xd05 pru_lock sys/sys/protosw.h:287 [inline] #1 soreceive+0xd05 sys/kern/uipc_socket.c:1062 #2 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #3 sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 #4 syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] #4 syscall+0x50f sys/arch/amd64/amd64/trap.c:606 #5 Xsyscall+0x128 shared rwlock netlock r = 0 (0xffffffff82bf3570) #0 witness_lock+0x447 #1 solock_shared+0x68 sys/kern/uipc_socket2.c:370 #2 soreceive+0xd05 pru_lock sys/sys/protosw.h:287 [inline] #2 soreceive+0xd05 sys/kern/uipc_socket.c:1062 #3 recvit+0x31b sys/kern/uipc_syscalls.c:1082 #4 sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 #5 syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] #5 syscall+0x50f sys/arch/amd64/amd64/trap.c:606 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10159 6390K 6421K 166960K 11237 0 pcb 13 8K 8K 166960K 13 0 rtable 58 1K 2K 166960K 112 0 pf 12 6K 6K 166960K 12 0 ifaddr 12 9K 9K 166960K 12 0 ifgroup 17 1K 1K 166960K 17 0 counters 46 34K 34K 166960K 46 0 ioctlops 0 0K 2K 166960K 21 0 iov 2 8K 8K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1174 73K 74K 166960K 1187 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 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 1 0K 0K 166960K 1 0 proc 55 78K 79K 166960K 246 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 11 0K 0K 166960K 11 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 246 0 tdb 3 0K 0K 166960K 3 0 pagedep 1 8K 8K 166960K 1 0 inodedep 1 32K 32K 166960K 1 0 newblk 1 0K 0K 166960K 1 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 94 4K 5K 166960K 2337 0 UVM aobj 3 2K 2K 166960K 3 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 3 0K 0K 166960K 3 0 temp 1 5904K 5968K 166960K 2809 0 kqueue 11 16K 18K 166960K 24 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 22 0 0 1 0 1 1 0 8 0 rtpcb 120 21 0 18 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 144 33 0 20 1 0 1 1 0 8 0 syncache 312 5 0 5 1 0 1 1 0 8 1 tcpqe 32 73 0 73 1 0 1 1 0 8 1 tcpcb 808 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 368 27 0 20 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1422 0 37 87 0 87 87 0 8 0 ffsino 272 1422 0 37 93 0 93 93 0 8 0 nchpl 144 1606 0 47 58 0 58 58 0 8 0 uvmvnodes 80 1431 0 0 30 0 30 30 0 8 0 vnodes 216 1431 0 0 80 0 80 80 0 8 0 namei 1024 4272 0 4272 1 0 1 1 0 8 1 percpumem 16 36 0 0 1 0 1 1 0 8 0 kstatmem 264 6 0 0 1 0 1 1 0 8 0 scxspl 216 4843 0 4843 3 1 2 2 1 8 2 plimitpl 152 16 0 10 1 0 1 1 0 8 0 sigapl 424 314 0 282 4 0 4 4 0 8 0 futexpl 64 2 0 1 1 0 1 1 0 8 0 knotepl 120 43 0 0 2 0 2 2 0 8 0 kqueuepl 216 20 0 13 1 0 1 1 0 8 0 pipepl 320 88 0 85 1 0 1 1 0 8 0 fdescpl 496 296 0 282 3 1 2 3 0 8 0 filepl 152 1133 0 1079 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 104 66 0 56 1 0 1 1 0 8 0 zombiepl 144 282 0 282 1 0 1 1 0 8 1 processpl 1072 314 0 282 3 0 3 3 0 8 0 procpl 680 317 0 282 3 0 3 3 0 8 0 sockpl 488 81 0 58 3 0 3 3 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 270 0 0 34 0 34 34 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 276 0 0 18 0 18 18 0 8 0 bufpl 288 2412 0 86 167 0 167 167 0 8 0 anonpl 24 168789 0 166920 23 0 23 23 0 186 11 amapchunkpl 152 8171 0 8017 7 0 7 7 0 158 1 amappl16 200 4746 0 4745 5 0 5 5 0 8 4 amappl15 192 13 0 12 1 0 1 1 0 8 0 amappl14 184 102 0 93 1 0 1 1 0 8 0 amappl13 176 16 0 16 1 1 0 1 0 8 0 amappl12 168 856 0 843 1 0 1 1 0 8 0 amappl11 160 50 0 40 1 0 1 1 0 8 0 amappl10 152 16 0 15 1 0 1 1 0 8 0 amappl9 144 163 0 163 1 0 1 1 0 8 1 amappl8 136 42 0 40 1 0 1 1 0 8 0 amappl7 128 156 0 144 1 0 1 1 0 8 0 amappl6 120 107 0 102 1 0 1 1 0 8 0 amappl5 112 93 0 85 1 0 1 1 0 8 0 amappl4 104 338 0 321 1 0 1 1 0 8 0 amappl3 96 2142 0 2106 1 0 1 1 0 8 0 amappl2 88 604 0 556 2 0 2 2 0 8 0 amappl1 80 8818 0 8394 11 0 11 11 0 8 0 amappl 88 2061 0 2005 2 0 2 2 0 92 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 24 296 0 282 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 296 0 282 1 0 1 1 0 8 0 vmmpekpl 168 6887 0 6871 1 0 1 1 0 8 0 vmmpepl 168 33437 0 32495 46 0 46 46 0 357 5 vmsppl 464 295 0 282 3 1 2 3 0 8 0 rwobjpl 56 17959 0 15902 31 0 31 31 0 8 1 pdppl 4096 600 0 564 52 16 36 42 0 8 0 pvpl 32 264298 0 260014 52 0 52 52 0 265 14 pmappl 248 295 0 282 2 1 1 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 474 0 18 14 0 14 14 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827bb889) at panic+0x17b sys/kern/subr_prf.c:198 assertwaitok() at assertwaitok+0x132 sys/kern/subr_xxx.c:163 mi_switch() at mi_switch+0x46 sys/kern/sched_bsd.c:360 sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414 rwsleep(fffffd806e879e88,ffffffff82bf3560,118,ffffffff827aae8e,0) at rwsleep+0xab sys/kern/kern_synch.c:300 sosleep_nsec(fffffd806e879d68,fffffd806e879e88,118,ffffffff827aae8e,ffffffffffffffff) at sosleep_nsec+0xff sys/kern/uipc_socket2.c:468 sblock(fffffd806e879d68,fffffd806e879e38,1) at sblock+0x1c4 sys/kern/uipc_socket2.c:514 soreceive(fffffd806e879d68,ffff80002a22be88,ffff80002a22be48,0,0,ffff80002a22c00c,2c3e90ef4a169b37) at soreceive+0x5fe sys/kern/uipc_socket.c:837 recvit(ffff80002a1862a0,3,ffff80002a22bfe0,0,ffff80002a22bfd8) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a1862a0,ffff80002a22c0e0,ffff80002a22c130) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a22c1b0) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a22c1b0) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x48432e6640, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82d68b70) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d68b70) at __mp_lock+0x122 sys/kern/kern_lock.c:147 wakeup_n(fffffd806e879e88,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:541 soreceive(fffffd806e879d68,ffff80002a226a78,ffff80002a226a38,0,0,ffff80002a226bfc,2c3e90ef4a169b37) at soreceive+0x1857 pru_unlock sys/sys/protosw.h:294 [inline] soreceive(fffffd806e879d68,ffff80002a226a78,ffff80002a226a38,0,0,ffff80002a226bfc,2c3e90ef4a169b37) at soreceive+0x1857 sys/kern/uipc_socket.c:1194 recvit(ffff80002a185aa8,3,ffff80002a226bd0,0,ffff80002a226bc8) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a185aa8,ffff80002a226cd0,ffff80002a226d20) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a226da0) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a226da0) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4815837170, count: 5 ddb{1}> trace x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82d68b70) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d68b70) at __mp_lock+0x122 sys/kern/kern_lock.c:147 wakeup_n(fffffd806e879e88,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:541 soreceive(fffffd806e879d68,ffff80002a226a78,ffff80002a226a38,0,0,ffff80002a226bfc,2c3e90ef4a169b37) at soreceive+0x1857 pru_unlock sys/sys/protosw.h:294 [inline] soreceive(fffffd806e879d68,ffff80002a226a78,ffff80002a226a38,0,0,ffff80002a226bfc,2c3e90ef4a169b37) at soreceive+0x1857 sys/kern/uipc_socket.c:1194 recvit(ffff80002a185aa8,3,ffff80002a226bd0,0,ffff80002a226bc8) at recvit+0x31b sys/kern/uipc_syscalls.c:1082 sys_recvmmsg(ffff80002a185aa8,ffff80002a226cd0,ffff80002a226d20) at sys_recvmmsg+0x320 sys/kern/uipc_syscalls.c:973 syscall(ffff80002a226da0) at syscall+0x50f mi_syscall sys/sys/syscall_mi.h:103 [inline] syscall(ffff80002a226da0) at syscall+0x50f sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4815837170, count: -10 ddb{1}>