Warning: Permanently added '10.128.1.231' (ED25519) to the list of known hosts. 2026/01/12 02:45:56 ignoring optional flag "type"="gce" 2026/01/12 02:45:56 parsed 1 programs 2026/01/12 02:45:57 executed programs: 0 panic: Data modified on freelist: word 4 of object 0xffff800001562000 size 0x494 previous type free (0x6563 != 0xdead4110) Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *522991 99908 0 0 0x4000000 0 syz-executor.7 db_enter() at db_enter+0x25 panic(ffffffff83339e55) at panic+0x1cf malloc(494,2,1) at malloc+0xdb6 readdoslabel(fffffd807b73c8d8,ffffffff82f34020,ffff80000155c800,0,0) at readdoslabel+0x10b readdisklabel(2902,ffffffff82f34020,ffff80000155c800,0) at readdisklabel+0x1f6 vndioctl(2902,20006473,ffff80002a865750,1,ffff80002a80cfb8) at vndioctl+0x5aa VOP_IOCTL(fffffd806ed642e8,20006473,ffff80002a865750,1,fffffd8007bfd4e0,ffff80002a80cfb8) at VOP_IOCTL+0xa3 vn_ioctl(fffffd806c5d0528,20006473,ffff80002a865750,ffff80002a80cfb8) at vn_ioctl+0xea sys_ioctl(ffff80002a80cfb8,ffff80002a865920,ffff80002a865870) at sys_ioctl+0x660 syscall(ffff80002a865920) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x881508596a0, count: 4 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: Data modified on freelist: word 4 of object 0xffff800001562000 size 0x494 previous type free (0x6563 != 0xdead4110) ddb> trace db_enter() at db_enter+0x25 panic(ffffffff83339e55) at panic+0x1cf malloc(494,2,1) at malloc+0xdb6 readdoslabel(fffffd807b73c8d8,ffffffff82f34020,ffff80000155c800,0,0) at readdoslabel+0x10b readdisklabel(2902,ffffffff82f34020,ffff80000155c800,0) at readdisklabel+0x1f6 vndioctl(2902,20006473,ffff80002a865750,1,ffff80002a80cfb8) at vndioctl+0x5aa VOP_IOCTL(fffffd806ed642e8,20006473,ffff80002a865750,1,fffffd8007bfd4e0,ffff80002a80cfb8) at VOP_IOCTL+0xa3 vn_ioctl(fffffd806c5d0528,20006473,ffff80002a865750,ffff80002a80cfb8) at vn_ioctl+0xea sys_ioctl(ffff80002a80cfb8,ffff80002a865920,ffff80002a865870) at sys_ioctl+0x660 syscall(ffff80002a865920) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x881508596a0, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a864aa0 rbx 0xffff800001562000 rdx 0x3fd rcx 0 rax 0x7c r8 0x101010101010101 r9 0x8080808080808080 r10 0x70aafccb06861c57 r11 0x4ed2ecda03441f34 r12 0 r13 0xffffffff83915010 kmemstats+0x80 r14 0 r15 0x1 rip 0xffffffff81cd2e75 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a864a90 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor.7) tid=522991 pid=99908 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=73, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a826a80,0xffffffff838d4098 process=0xffff8000ffffa418 user=0xffff80002a860000, vmspace=0xfffffd8069811b90 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 99908 314401 63364 0 2 0 syz-executor.7 *99908 522991 63364 0 7 0x4000000 syz-executor.7 77020 307258 80078 0 3 0x10000082 nanoslp syz-executor.6 63364 182443 80078 0 3 0x82 nanoslp syz-executor.7 34562 295348 80078 0 2 0x2 syz-executor.3 32610 17325 80078 0 3 0x10000082 nanoslp syz-executor.5 93657 434576 80078 0 3 0x2 biowait syz-executor.4 32903 274492 80078 0 3 0x10000082 nanoslp syz-executor.2 80943 109592 80078 0 3 0x10000082 nanoslp syz-executor.1 84290 10684 80078 0 2 0x2 syz-executor.0 80078 472383 63863 0 3 0x82 wait syz-execprog 80078 193307 63863 0 3 0x4000082 nanoslp syz-execprog 80078 295467 63863 0 3 0x4000082 wait syz-execprog 80078 376425 63863 0 3 0x4000082 wait syz-execprog 80078 347688 63863 0 3 0x4000082 thrsleep syz-execprog 80078 2494 63863 0 3 0x4000082 wait syz-execprog 80078 22999 63863 0 3 0x4000082 thrsleep syz-execprog 80078 296033 63863 0 3 0x4000082 wait syz-execprog 80078 237397 63863 0 3 0x4000082 wait syz-execprog 80078 289618 63863 0 3 0x4000082 thrsleep syz-execprog 80078 135980 63863 0 3 0x4000082 wait syz-execprog 80078 334763 63863 0 3 0x4000082 wait syz-execprog 80078 162450 63863 0 3 0x4000082 kqread syz-execprog 63863 252082 69883 0 3 0x10008a sigsusp ksh 69883 87592 19683 0 3 0x98 kqread sshd-session 19683 106408 21246 0 3 0x92 kqread sshd-session 23835 100445 1 0 3 0x100083 ttyin getty 21246 208324 1 0 3 0x88 kqread sshd 34549 49947 93578 73 3 0x1100090 kqread syslogd 93578 311625 1 0 3 0x100082 sbwait syslogd 48692 217010 1 0 3 0x100080 kqread resolvd 40680 138245 86199 77 3 0x100092 kqread dhcpleased 12011 95879 86199 77 3 0x100092 kqread dhcpleased 86199 125163 1 0 3 0x80 kqread dhcpleased 52456 295778 0 0 3 0x14200 bored smr 36796 518145 0 0 2 0x14200 zerothread 9178 272104 0 0 3 0x14200 aiodoned aiodoned 66103 31109 0 0 3 0x14200 syncer update 14804 258319 0 0 3 0x14200 cleaner cleaner 16863 375200 0 0 3 0x14200 reaper reaper 25761 118886 0 0 3 0x14200 pgdaemon pagedaemon 24427 60984 0 0 3 0x14200 bored viomb 69920 131760 0 0 3 0x40014200 acpi0 acpi0 85557 315167 0 0 3 0x14200 bored softnet0 79380 480608 0 0 3 0x14200 bored systqmp 81329 25979 0 0 3 0x14200 bored systq 16475 432825 0 0 3 0x40014200 tmoslp softclock 31029 414008 0 0 3 0x40014200 idle0 1 345743 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11025 12106K 12118K 166960K 12157 0 pcb 17 12K 12K 166960K 17 0 rtable 237 6K 6K 166960K 385 0 pf 30 12K 12K 166960K 33 0 ifaddr 42 7K 7K 166960K 48 0 ifgroup 50 2K 2K 166960K 55 0 sysctl 1 1K 9K 166960K 5 0 counters 33 17K 17K 166960K 34 0 ioctlops 0 0K 2K 166960K 30 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1263 79K 80K 166960K 1284 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 1692 195K 286K 166960K 12470 0 file desc 11 37K 69K 166960K 212 0 proc 57 58K 75K 166960K 499 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 99 7K 7K 166960K 110 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 431 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 216 151K 206K 166960K 4897 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 33 66K 104K 166960K 1615 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 11 0K 2K 166960K 30 0 temp 2 8658K 8720K 166960K 5013 0 kqueue 13 20K 20K 166960K 46 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 39 0 36 1 0 1 1 0 8 0 rtentry 136 122 0 12 4 0 4 4 0 8 0 unpcb 144 67 0 52 1 0 1 1 0 8 0 syncache 336 9 0 9 1 0 1 1 0 8 1 tcpcb 736 12 0 9 1 0 1 1 0 8 0 arp 96 20 0 2 1 0 1 1 0 8 0 inpcb 328 66 0 60 1 0 1 1 0 8 0 nd6 112 27 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 501 0 48 29 0 29 29 0 8 0 art_table 40 502 0 48 5 0 5 5 0 8 0 art_node 32 122 0 22 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1739 0 207 96 0 96 96 0 8 0 ffsino 256 1739 0 207 96 0 96 96 0 8 0 nchpl 144 2129 0 347 67 0 67 67 0 8 0 vnodes 216 1749 0 0 98 0 98 98 0 8 0 namei 1024 7733 0 7733 3 0 3 3 0 8 3 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 14027 0 14026 8 0 8 8 1 8 7 plimitpl 152 58 0 42 1 0 1 1 0 8 0 sigapl 424 562 0 522 5 0 5 5 0 8 0 knotepl 120 7129 0 7050 3 0 3 3 0 8 0 kqueuepl 184 42 0 33 1 0 1 1 0 8 0 pipepl 304 189 0 161 3 0 3 3 0 8 0 fdescpl 448 549 0 526 4 0 4 4 0 8 1 filepl 120 2282 0 2148 5 0 5 5 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 34 0 18 1 0 1 1 0 8 0 pgrppl 48 34 0 18 1 0 1 1 0 8 0 ucredpl 104 176 0 164 1 0 1 1 0 8 0 zombiepl 144 526 0 522 1 0 1 1 0 8 0 processpl 1152 562 0 522 4 0 4 4 0 8 0 procpl 664 649 0 596 6 0 6 6 0 8 0 sockpl 552 172 0 148 2 0 2 2 0 8 0 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 8891 0 8831 17 1 16 17 0 8 8 mcl2k 2048 275 0 275 1 0 1 1 0 8 1 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 12476 0 12321 10 0 10 10 0 8 0 bufpl 280 8864 0 2576 450 0 450 450 0 8 0 anonpl 24 224730 0 220963 59 0 59 59 0 187 26 amapchunkpl 152 15089 0 14643 29 0 29 29 0 158 9 amappl16 200 5176 0 5097 10 0 10 10 0 8 5 amappl15 192 12 0 12 1 0 1 1 0 8 1 amappl14 184 27 0 25 1 0 1 1 0 8 0 amappl13 176 470 0 469 1 0 1 1 0 8 0 amappl12 168 1023 0 988 3 0 3 3 0 8 1 amappl11 160 18 0 18 1 0 1 1 0 8 1 amappl10 152 106 0 86 1 0 1 1 0 8 0 amappl9 144 977 0 977 1 0 1 1 0 8 1 amappl8 136 191 0 163 2 0 2 2 0 8 0 amappl7 128 194 0 188 1 0 1 1 0 8 0 amappl6 120 437 0 422 2 0 2 2 0 8 0 amappl5 112 174 0 166 1 0 1 1 0 8 0 amappl4 104 652 0 624 2 0 2 2 0 8 0 amappl3 96 1921 0 1856 3 0 3 3 0 8 1 amappl2 88 1061 0 1003 5 0 5 5 0 8 2 amappl1 80 17746 0 17204 27 7 20 23 0 8 8 amappl 88 3694 0 3570 5 0 5 5 0 92 1 uvmvnodes 80 115 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 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 24 549 0 526 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 549 0 526 1 0 1 1 0 8 0 vmmpekpl 168 12332 0 12289 3 0 3 3 0 8 0 vmmpepl 168 68938 0 67363 122 0 122 122 0 357 45 vmsppl 368 548 0 526 3 0 3 3 0 8 0 rwobjpl 40 26956 0 25947 19 1 18 19 0 8 4 pdppl 4096 1105 0 1052 115 48 67 69 0 8 14 pvpl 32 602506 0 593605 460 149 311 443 0 265 226 pmappl 216 548 0 526 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 384 0 49 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 panic(ffffffff83339e55) at panic+0x1cf malloc(494,2,1) at malloc+0xdb6 readdoslabel(fffffd807b73c8d8,ffffffff82f34020,ffff80000155c800,0,0) at readdoslabel+0x10b readdisklabel(2902,ffffffff82f34020,ffff80000155c800,0) at readdisklabel+0x1f6 vndioctl(2902,20006473,ffff80002a865750,1,ffff80002a80cfb8) at vndioctl+0x5aa VOP_IOCTL(fffffd806ed642e8,20006473,ffff80002a865750,1,fffffd8007bfd4e0,ffff80002a80cfb8) at VOP_IOCTL+0xa3 vn_ioctl(fffffd806c5d0528,20006473,ffff80002a865750,ffff80002a80cfb8) at vn_ioctl+0xea sys_ioctl(ffff80002a80cfb8,ffff80002a865920,ffff80002a865870) at sys_ioctl+0x660 syscall(ffff80002a865920) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x881508596a0, count: -11 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 panic(ffffffff83339e55) at panic+0x1cf malloc(494,2,1) at malloc+0xdb6 readdoslabel(fffffd807b73c8d8,ffffffff82f34020,ffff80000155c800,0,0) at readdoslabel+0x10b readdisklabel(2902,ffffffff82f34020,ffff80000155c800,0) at readdisklabel+0x1f6 vndioctl(2902,20006473,ffff80002a865750,1,ffff80002a80cfb8) at vndioctl+0x5aa VOP_IOCTL(fffffd806ed642e8,20006473,ffff80002a865750,1,fffffd8007bfd4e0,ffff80002a80cfb8) at VOP_IOCTL+0xa3 vn_ioctl(fffffd806c5d0528,20006473,ffff80002a865750,ffff80002a80cfb8) at vn_ioctl+0xea sys_ioctl(ffff80002a80cfb8,ffff80002a865920,ffff80002a865870) at sys_ioctl+0x660 syscall(ffff80002a865920) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x881508596a0, count: -11