uvm_fault(0xffffffff82b29970, 0xffff8000114cf032, 0, 2) -> d kernel: page fault trap, code=0 Stopped at memset+0x45: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *333090 21482 73 0x100010 0 0K syslogd memset() at memset+0x45 ffs_write(ffff8000211bc7c0) at ffs_write+0x924 VOP_WRITE(fffffd806e93b050,ffff8000211bc9e0,3,fffffd807f7d8720) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd807081a720,ffff8000211bc9e0,0) at vn_write+0x157 sys/kern/vfs_vnops.c:414 dofilewritev(ffff80002117c010,e,ffff8000211bc9e0,0,ffff8000211bcae0) at dofilewritev+0x19c sys/kern/sys_generic.c:380 sys_writev(ffff80002117c010,ffff8000211bca80,ffff8000211bcae0) at sys_writev+0xa7 sys/kern/sys_generic.c:327 syscall(ffff8000211bcb50) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211bcb50) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2500, 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: uvm_fault(0xffffffff82b29970, 0xffff8000114cf032, 0, 2) -> d ddb{0}> trace memset() at memset+0x45 ffs_write(ffff8000211bc7c0) at ffs_write+0x924 VOP_WRITE(fffffd806e93b050,ffff8000211bc9e0,3,fffffd807f7d8720) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd807081a720,ffff8000211bc9e0,0) at vn_write+0x157 sys/kern/vfs_vnops.c:414 dofilewritev(ffff80002117c010,e,ffff8000211bc9e0,0,ffff8000211bcae0) at dofilewritev+0x19c sys/kern/sys_generic.c:380 sys_writev(ffff80002117c010,ffff8000211bca80,ffff8000211bcae0) at sys_writev+0xa7 sys/kern/sys_generic.c:327 syscall(ffff8000211bcb50) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211bcb50) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2500, count: -8 ddb{0}> show registers rdi 0xffff8000114cf032 rsi 0 rbp 0xffff8000211bc6e0 rbx 0x1 rdx 0x6 rcx 0x6 rax 0 r8 0x3fc8 __ALIGN_SIZE+0x2fc8 r9 0xffff8000211bc638 r10 0xd2843da5f619f496 r11 0xffff8000114cf032 r12 0x168032 acpi_pdirpa+0x153e9a r13 0xfffffd806e738020 r14 0x4000 __ALIGN_SIZE+0x3000 r15 0xfffffd806e738008 rip 0xffffffff81633ba5 memset+0x45 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000211bc4e8 ss 0x10 memset+0x45: repe stosb %es:(%rdi) ddb{0}> show proc PROC (syslogd) pid=333090 stat=onproc flags process=100010 proc=0 pri=17, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80002117c550,0xffff8000211427f8 process=0xffff8000ffffa570 user=0xffff8000211b7000, vmspace=0xfffffd8070ea0a18 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54874 480012 36942 0 2 0 syz-executor.7 54874 281677 36942 0 3 0x4000080 fsleep syz-executor.7 87540 422249 9990 0 2 0 syz-executor.0 87540 115120 9990 0 3 0x4000080 fsleep syz-executor.0 2652 232828 41957 0 2 0 syz-executor.6 2652 223213 41957 0 2 0x4000000 syz-executor.6 75877 117114 53217 0 2 0 syz-executor.2 75877 64105 53217 0 3 0x4000080 fsleep syz-executor.2 2182 116648 50956 0 2 0 syz-executor.4 2182 503274 50956 0 3 0x4000080 lockf syz-executor.4 2182 361910 50956 0 2 0x4000000 syz-executor.4 2182 244803 50956 0 3 0x4000080 fsleep syz-executor.4 69458 335350 21717 0 2 0x480 syz-executor.1 69458 150625 21717 0 3 0x4000080 netio syz-executor.1 69458 187397 21717 0 3 0x4000080 netio syz-executor.1 69458 225894 21717 0 3 0x4000080 fsleep syz-executor.1 31010 170583 0 0 3 0x14200 acct acct 76600 202519 13438 0 2 0x2 syz-executor.3 21717 229947 13438 0 2 0x482 syz-executor.1 50956 459031 13438 0 2 0x482 syz-executor.4 9990 345209 13438 0 2 0x482 syz-executor.0 36942 377557 13438 0 3 0x82 nanoslp syz-executor.7 67818 270488 13438 0 2 0x2 syz-executor.5 41957 98138 13438 0 3 0x82 nanoslp syz-executor.6 53217 134579 13438 0 2 0x482 syz-executor.2 33162 228971 0 0 3 0x14280 nfsidl nfsio 85852 424929 0 0 3 0x14280 nfsidl nfsio 28676 99424 0 0 3 0x14200 bored sosplice 13438 63405 36179 0 3 0x82 thrsleep syz-fuzzer 13438 373177 36179 0 2 0x4000482 syz-fuzzer 13438 329311 36179 0 3 0x4000082 thrsleep syz-fuzzer 13438 512148 36179 0 2 0x4000482 syz-fuzzer 13438 187199 36179 0 3 0x4000082 kqread syz-fuzzer 13438 394755 36179 0 3 0x4000082 thrsleep syz-fuzzer 13438 134142 36179 0 3 0x4000082 thrsleep syz-fuzzer 13438 503159 36179 0 3 0x4000082 thrsleep syz-fuzzer 13438 317759 36179 0 3 0x4000082 thrsleep syz-fuzzer 36179 225725 36884 0 3 0x10008a sigsusp ksh 36884 476069 85713 0 3 0x9a poll sshd 66625 255782 1 0 3 0x100083 ttyin getty 85713 167933 1 0 3 0x88 poll sshd 8047 490003 65152 74 3 0x100092 bpf pflogd 65152 271141 1 0 3 0x80 netio pflogd *21482 333090 88375 73 7 0x100010 syslogd 88375 272134 1 0 3 0x100082 netio syslogd 92107 44985 1 0 3 0x100080 kqread resolvd 3767 455513 30132 77 3 0x100092 kqread dhcpleased 90417 307139 30132 77 3 0x100092 kqread dhcpleased 30132 312879 1 0 3 0x80 kqread dhcpleased 44746 404766 0 0 3 0x14200 bored smr 92138 95813 0 0 2 0x14200 zerothread 28653 517239 0 0 3 0x14200 aiodoned aiodoned 45265 58192 0 0 3 0x14200 syncer update 85051 79933 0 0 3 0x14200 cleaner cleaner 69656 145578 0 0 3 0x14200 reaper reaper 53700 469909 0 0 3 0x14200 pgdaemon pagedaemon 1704 469460 0 0 3 0x14200 bored viomb 29249 237871 0 0 3 0x40014200 acpi0 acpi0 79272 372524 0 0 7 0x40014200 idle1 22759 289045 0 0 3 0x14200 bored softnet 47753 315487 0 0 2 0x14200 systqmp 94939 61036 0 0 3 0x14200 bored systq 14072 130710 0 0 3 0x40014200 bored softclock 14867 274697 0 0 3 0x40014200 idle0 1 113615 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 76600 (syz-executor.3) thread 0xffff8000ffff4fd0 (202519) exclusive rrwlock inode r = 0 (0xfffffd807256a098) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3100 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80708e6a30) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3085 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 21482 (syslogd) thread 0xffff80002117c010 (333090) exclusive rrwlock inode r = 0 (0xfffffd806e7380a0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vn_write+0x123 sys/kern/vfs_vnops.c:411 #6 dofilewritev+0x19c sys/kern/sys_generic.c:380 #7 sys_writev+0xa7 sys/kern/sys_generic.c:327 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82aa6758) #0 witness_lock+0x44d #1 vn_write+0x42 sys/kern/vfs_vnops.c:399 #2 dofilewritev+0x19c sys/kern/sys_generic.c:380 #3 sys_writev+0xa7 sys/kern/sys_generic.c:327 #4 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10228 6529K 7107K 78643K 54852 0 pcb 13 20K 25K 78643K 3293 0 rtable 289 33K 35K 78643K 8884 0 ifaddr 118 26K 27K 78643K 2653 0 sysctl 3 1K 3K 78643K 78 0 counters 58 35K 36K 78643K 488 0 ioctlops 0 0K 8K 78643K 8300 0 iov 0 0K 28K 78643K 2679 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1622 101K 102K 78643K 14784 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 233 0 VM map 2 1K 1K 78643K 2 0 sem 19 16K 32K 78643K 2646 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 16 57K 93K 78643K 23666 0 sigio 0 0K 0K 78643K 594 0 proc 73 87K 124K 78643K 3604 0 subproc 104 6K 10K 78643K 1216 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1584 0 in_multi 81 5K 7K 78643K 1784 0 ether_multi 1 0K 0K 78643K 246 0 mrt 2 0K 0K 78643K 75 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 4883 0 pfkey data 0 0K 0K 78643K 39 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 858 2212K 2217K 78643K 296025 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1211 0 NDP 16 0K 2K 78643K 457 0 temp 166 4738K 8837K 78643K 209353 0 kqueue 10 14K 24K 78643K 1217 0 SYN cache 2 16K 16K 78643K 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 1455 0 1452 22 21 1 5 0 8 0 rtentry 112 1615 0 1524 4 0 4 4 0 8 0 unpcb 136 16212 0 16196 171 170 1 10 0 8 0 syncache 296 29 0 29 10 10 0 1 0 8 0 tcpqe 32 1033 42 1033 6 6 0 1 0 8 0 tcpcb 736 20086 0 20081 396 389 7 19 0 8 6 arp 120 305 0 287 1 0 1 1 0 8 0 inpcb 304 46718 0 46674 348 339 9 19 0 8 5 rttmr 72 12 0 12 4 4 0 1 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 339 0 318 1 0 1 1 0 8 0 pkpcb 40 135 0 135 14 14 0 1 0 8 0 kcovpl 48 87 0 79 1 0 1 1 0 8 0 ppxss 1248 45 0 45 17 17 0 1 0 8 0 pfstscr 40 42 0 42 8 8 0 1 0 8 0 pffrag 232 44 0 44 7 7 0 1 0 482 0 pffrnode 88 42 0 42 7 7 0 1 0 8 0 pffrent 40 811 0 811 10 10 0 1 0 8 0 pfosfp 40 1431 0 1007 5 0 5 5 0 8 0 pfosfpen 112 1431 0 716 21 0 21 21 0 8 0 pfrke_plain 168 54 0 54 6 6 0 1 0 8 0 pfrktable 1344 1943 0 1910 10 7 3 4 0 8 0 pftag 88 67 0 55 1 0 1 1 0 8 0 pfqueue 264 3 0 3 1 1 0 1 0 8 0 pfstitem 24 37 0 35 1 0 1 1 0 8 0 pfstkey 112 79 0 77 1 0 1 1 0 8 0 pfstate 320 51 0 49 2 1 1 2 0 8 0 pfrule 1360 1295 0 1082 22 4 18 18 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 6400 0 6038 51 28 23 31 0 8 0 art_table 32 6402 0 6039 4 0 4 4 0 8 0 art_node 16 1601 0 1521 1 0 1 1 0 8 0 sysvmsgpl 40 171 0 157 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 2640 0 2623 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 32109 0 30543 98 0 98 98 0 8 0 ffsino 272 32109 0 30543 105 0 105 105 0 8 0 nchpl 144 62572 0 60948 63 0 63 63 0 8 0 rtmask 32 62 0 62 5 5 0 1 0 8 0 uvmvnodes 80 28856 0 0 589 0 589 589 0 8 0 vnodes 224 28856 0 0 1698 0 1698 1698 0 8 0 namei 1024 226234 0 226233 14 13 1 2 0 8 0 percpumem 16 256 0 215 1 0 1 1 0 8 0 vcpupl 2048 380 0 0 48 0 48 48 0 8 0 vmpool 560 395 0 15 30 2 28 28 0 8 0 pfiaddrpl 120 605 0 540 4 2 2 3 0 8 0 scsiplug 72 25 0 25 7 7 0 1 0 8 0 scxspl 216 203512 0 203512 33 32 1 8 0 8 1 plimitpl 152 2925 0 2910 1 0 1 1 0 8 0 sigapl 424 23836 0 23789 8 1 7 8 0 8 0 futexpl 64 220767 0 220762 8 7 1 1 0 8 0 knotepl 112 290 0 0 4 0 4 4 0 8 0 kqueuepl 216 5811 0 5804 121 120 1 8 0 8 0 pipepl 336 5302 0 5274 128 125 3 9 0 8 0 fdescpl 496 23797 0 23768 9 5 4 5 0 8 0 filepl 152 179613 0 179334 283 267 16 24 0 8 5 lockfpl 104 6800 0 6790 18 17 1 4 0 8 0 lockfspl 48 1866 0 1859 1 0 1 1 0 8 0 sessionpl 144 103 0 86 1 0 1 1 0 8 0 pgrppl 48 216 0 199 1 0 1 1 0 8 0 ucredpl 96 19504 0 19489 1 0 1 1 0 8 0 zombiepl 144 23789 0 23789 3 2 1 1 0 8 1 processpl 1064 23836 0 23789 5 0 5 5 0 8 0 procpl 672 64700 0 64635 25 18 7 9 0 8 0 srpgc 96 80 0 80 24 24 0 1 0 8 0 sosppl 168 183 0 183 32 31 1 1 0 8 1 sockpl 480 64581 0 64518 1178 1166 12 40 0 8 4 mcl64k 65536 33 0 0 4 1 3 3 0 8 0 mcl16k 16384 25 0 0 4 2 2 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 20 0 0 2 0 2 2 0 8 0 mcl8k 8192 27 0 0 3 0 3 3 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 17 0 0 2 0 2 2 0 8 0 mcl2k 2048 563 0 0 27 5 22 27 0 8 0 mtagpl 96 1399 0 0 19 1 18 18 0 8 0 mbufpl 256 5646 0 0 343 0 343 343 0 8 0 bufpl 288 43415 0 36932 535 13 522 535 0 8 0 anonpl 24 6754798 0 6732609 408 250 158 183 0 186 0 amapchunkpl 152 781356 0 780381 220 169 51 58 0 158 9 amappl16 200 66075 0 65197 267 214 53 69 0 8 3 amappl15 192 7563 0 7555 1 0 1 1 0 8 0 amappl14 184 3993 0 3989 1 0 1 1 0 8 0 amappl13 176 2131 0 2127 1 0 1 1 0 8 0 amappl12 168 1439 0 1432 1 0 1 1 0 8 0 amappl11 160 1318 0 1300 1 0 1 1 0 8 0 amappl10 152 2675 0 2665 1 0 1 1 0 8 0 amappl9 144 3012 0 3006 1 0 1 1 0 8 0 amappl8 136 6120 0 5949 8 1 7 7 0 8 0 amappl7 128 4049 0 4037 1 0 1 1 0 8 0 amappl6 120 3092 0 3063 3 1 2 2 0 8 0 amappl5 112 22432 0 22397 2 0 2 2 0 8 0 amappl4 104 6408 0 6368 5 3 2 2 0 8 0 amappl3 96 3538 0 3509 1 0 1 1 0 8 0 amappl2 88 5036 0 4929 5 2 3 3 0 8 0 amappl1 80 424324 0 423727 22 8 14 19 0 8 0 amappl 88 293515 0 293058 14 3 11 11 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 24192 0 23783 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 24192 0 23783 3 0 3 3 0 8 0 vmmpekpl 168 173332 0 173233 5 0 5 5 0 8 0 vmmpepl 168 2172846 0 2168977 720 498 222 294 0 357 40 vmsppl 368 24191 0 23783 40 2 38 38 0 8 0 rwobjpl 56 539669 0 508425 460 19 441 441 0 8 0 pdppl 4096 48391 0 47946 1221 772 449 449 0 8 4 pvpl 32 11439604 0 11413842 850 613 237 292 0 265 7 pmappl 248 24191 0 23783 28 2 26 26 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 3050 0 1357 49 0 49 49 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace memset() at memset+0x45 ffs_write(ffff8000211bc7c0) at ffs_write+0x924 VOP_WRITE(fffffd806e93b050,ffff8000211bc9e0,3,fffffd807f7d8720) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd807081a720,ffff8000211bc9e0,0) at vn_write+0x157 sys/kern/vfs_vnops.c:414 dofilewritev(ffff80002117c010,e,ffff8000211bc9e0,0,ffff8000211bcae0) at dofilewritev+0x19c sys/kern/sys_generic.c:380 sys_writev(ffff80002117c010,ffff8000211bca80,ffff8000211bcae0) at sys_writev+0xa7 sys/kern/sys_generic.c:327 syscall(ffff8000211bcb50) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211bcb50) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2500, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a 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+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> tace No such command