Warning: Permanently added '10.128.0.167' (ED25519) to the list of known hosts. 2026/04/01 20:39:46 ignoring optional flag "type"="gce" 2026/04/01 20:39:46 parsed 1 programs 2026/04/01 20:39:48 executed programs: 0 Data modified on freelist: word -35183672142114 of object 0xffff80000158f000 size 0x528 previous type free (invalid addr 0xcc25ff61339efbea) panic: Data modified on freelist: word 4 of object 0xffff80000158f000 size 0x528 previous type free (0x6563 != 0xdeaf4152) Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *426517 43603 0 0x2 0 0 syz-executor.5 db_enter() at db_enter+0x25 panic(ffffffff833e1c6d) at panic+0x1cf malloc(528,64,1) at malloc+0xdb6 process_new(ffff80002a834a88,ffff80002a7adf90,1) at process_new+0x3cb fork1(ffff80002a7ec548,1,ffffffff81b37860,0,ffff80002a88b1c0,0) at fork1+0x3f2 syscall(ffff80002a88b270) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761277fb3f10, count: 8 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 0xffff80000158f000 size 0x528 previous type free (0x6563 != 0xdeaf4152) ddb> trace db_enter() at db_enter+0x25 panic(ffffffff833e1c6d) at panic+0x1cf malloc(528,64,1) at malloc+0xdb6 process_new(ffff80002a834a88,ffff80002a7adf90,1) at process_new+0x3cb fork1(ffff80002a7ec548,1,ffffffff81b37860,0,ffff80002a88b1c0,0) at fork1+0x3f2 syscall(ffff80002a88b270) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761277fb3f10, count: -7 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a88aee0 rbx 0xffff80000158f000 rdx 0x3fd rcx 0 rax 0x7c r8 0x101010101010101 r9 0x8080808080808080 r10 0x89e268970bac187f r11 0xc66824484487413c r12 0 r13 0xffffffff83a745b0 kmemstats+0x1900 r14 0 r15 0x1 rip 0xffffffff81de7405 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a88aed0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor.5) tid=426517 pid=43603 tcnt=1 stat=onproc flags process=2 proc=0 runpri=51, usrpri=55, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7ecfa8,0xffff80002a746a78 process=0xffff80002a7adf90 user=0xffff80002a886000, vmspace=0xfffffd807ecdf170 estcpu=5, cpticks=3, pctcpu=0.1, user=0, sys=3, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 56510 326671 22353 0 2 0 syz-executor.4 56510 161524 22353 0 3 0x4000080 fsleep syz-executor.4 6066 16144 30016 0 2 0 syz-executor.6 62341 500875 66277 0 2 0 syz-executor.2 62341 174985 66277 0 3 0x4000080 fsleep syz-executor.2 68848 200288 51783 0 2 0 syz-executor.3 68848 280723 51783 0 3 0x4000080 fsleep syz-executor.3 77564 251250 1492 0 2 0 syz-executor.1 77564 194789 1492 0 3 0x4000080 fsleep syz-executor.1 46322 742 28592 0 2 0 syz-executor.7 46322 13823 28592 0 3 0x4000080 fsleep syz-executor.7 6481 52292 31597 0 2 0 syz-executor.0 6481 102492 31597 0 2 0x4000000 syz-executor.0 30016 458258 2721 0 3 0x82 nanoslp syz-executor.6 51783 272566 2721 0 2 0x2 syz-executor.3 66277 139677 2721 0 3 0x82 nanoslp syz-executor.2 28592 471778 2721 0 3 0x82 nanoslp syz-executor.7 *43603 426517 2721 0 7 0x2 syz-executor.5 22353 412923 2721 0 3 0x82 nanoslp syz-executor.4 1492 358795 2721 0 3 0x82 nanoslp syz-executor.1 31597 411257 2721 0 3 0x82 nanoslp syz-executor.0 2721 497161 40870 0 3 0x82 thrsleep syz-execprog 2721 309677 40870 0 3 0x4000082 thrsleep syz-execprog 2721 13954 40870 0 3 0x4000082 wait syz-execprog 2721 457889 40870 0 3 0x4000082 wait syz-execprog 2721 432573 40870 0 3 0x4000082 wait syz-execprog 2721 199329 40870 0 3 0x4000082 wait syz-execprog 2721 109084 40870 0 3 0x4000082 thrsleep syz-execprog 2721 372888 40870 0 3 0x4000082 wait syz-execprog 2721 339448 40870 0 3 0x4000082 wait syz-execprog 2721 353589 40870 0 3 0x4000082 thrsleep syz-execprog 2721 91323 40870 0 3 0x4000082 wait syz-execprog 2721 353545 40870 0 3 0x4000082 wait syz-execprog 2721 166861 40870 0 3 0x4000082 kqread syz-execprog 40870 416263 3795 0 3 0x10008a sigsusp ksh 3795 478755 79644 0 3 0x98 kqread sshd-session 79644 266662 93698 0 3 0x92 kqread sshd-session 84437 146897 1 0 3 0x100083 ttyin getty 93698 117422 1 0 3 0x88 kqread sshd 69519 460681 11772 73 3 0x1100090 kqread syslogd 11772 252953 1 0 3 0x100082 sbwait syslogd 89416 107031 1 0 3 0x100080 kqread resolvd 85126 272590 89639 77 3 0x100092 kqread dhcpleased 87020 495598 89639 77 3 0x100092 kqread dhcpleased 89639 193720 1 0 3 0x80 kqread dhcpleased 40587 55262 0 0 3 0x14200 bored smr 15609 182567 0 0 2 0x14200 zerothread 29420 333842 0 0 3 0x14200 aiodoned aiodoned 48079 205017 0 0 3 0x14200 syncer update 50492 484408 0 0 3 0x14200 cleaner cleaner 23439 308181 0 0 3 0x14200 reaper reaper 50218 506738 0 0 3 0x14200 pgdaemon pagedaemon 6050 490243 0 0 3 0x14200 bored viomb 43209 175627 0 0 3 0x40014200 acpi0 acpi0 70348 84853 0 0 3 0x14200 bored softnet0 49286 346680 0 0 3 0x14200 bored systqmp 5337 401499 0 0 3 0x14200 bored systq 98561 488797 0 0 3 0x40014200 tmoslp softclock 80129 255434 0 0 3 0x40014200 idle0 1 56465 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 11027 12102K 12119K 166960K 12137 0 pcb 17 12K 12K 166960K 17 0 rtable 237 6K 6K 166960K 383 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 1215 76K 77K 166960K 1281 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 17 61K 69K 166960K 177 0 proc 57 58K 75K 166960K 523 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 mrt 0 0K 0K 166960K 2 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 432 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 254 153K 207K 166960K 4666 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 39 80K 104K 166960K 1582 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 25 1K 2K 166960K 30 0 temp 1 9060K 9128K 166960K 4984 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 38 0 35 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 256 500 0 48 29 0 29 29 0 8 0 art_table 40 501 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 1673 0 189 93 0 93 93 0 8 0 ffsino 256 1673 0 189 93 0 93 93 0 8 0 nchpl 144 1999 0 221 67 0 67 67 0 8 0 vnodes 216 1683 0 0 94 0 94 94 0 8 0 namei 1024 7496 0 7496 3 0 3 3 0 8 3 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 11445 0 11445 8 0 8 8 1 8 8 plimitpl 152 58 0 42 1 0 1 1 0 8 0 sigapl 424 529 0 487 5 0 5 5 0 8 0 knotepl 120 7291 0 7212 3 0 3 3 0 8 0 kqueuepl 184 42 0 33 1 0 1 1 0 8 0 pipepl 304 194 0 166 3 0 3 3 0 8 0 fdescpl 448 516 0 487 4 0 4 4 0 8 0 filepl 120 2206 0 2063 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 104 159 0 148 1 0 1 1 0 8 0 zombiepl 144 487 0 487 1 0 1 1 0 8 1 processpl 1152 530 0 487 4 0 4 4 0 8 0 procpl 664 584 0 523 6 0 6 6 0 8 0 sockpl 552 171 0 147 2 0 2 2 0 8 0 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 8994 0 8936 17 1 16 17 0 8 8 mcl2k 2048 156 0 156 1 0 1 1 0 8 1 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 12710 0 12571 9 0 9 9 0 8 0 bufpl 280 6345 0 176 441 0 441 441 0 8 0 anonpl 24 214932 0 210313 59 0 59 59 0 187 28 amapchunkpl 152 14140 0 13558 30 0 30 30 0 158 7 amappl16 200 4530 0 4404 9 0 9 9 0 8 2 amappl15 192 14 0 14 1 0 1 1 0 8 1 amappl14 184 442 0 439 1 0 1 1 0 8 0 amappl13 176 253 0 242 2 0 2 2 0 8 1 amappl12 168 827 0 798 2 0 2 2 0 8 0 amappl11 160 48 0 47 1 0 1 1 0 8 0 amappl10 152 106 0 88 1 0 1 1 0 8 0 amappl9 144 971 0 971 1 0 1 1 0 8 1 amappl8 136 260 0 235 1 0 1 1 0 8 0 amappl7 128 280 0 265 2 0 2 2 0 8 0 amappl6 120 270 0 268 1 0 1 1 0 8 0 amappl5 112 181 0 174 1 0 1 1 0 8 0 amappl4 104 518 0 495 2 0 2 2 0 8 1 amappl3 96 1801 0 1701 3 0 3 3 0 8 0 amappl2 88 1114 0 1056 5 0 5 5 0 8 2 amappl1 80 17995 0 17428 28 8 20 23 0 8 8 amappl 88 3500 0 3335 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 24 516 0 487 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 516 0 487 1 0 1 1 0 8 0 vmmpekpl 168 12111 0 12073 2 0 2 2 0 8 0 vmmpepl 168 67663 0 65808 122 0 122 122 0 357 41 vmsppl 368 515 0 487 3 0 3 3 0 8 0 rwobjpl 40 26486 0 25393 19 1 18 19 0 8 3 pdppl 4096 1038 0 974 112 44 68 68 0 8 4 pvpl 32 591127 0 581062 471 149 322 444 0 265 240 pmappl 216 515 0 487 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 374 0 45 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 panic(ffffffff833e1c6d) at panic+0x1cf malloc(528,64,1) at malloc+0xdb6 process_new(ffff80002a834a88,ffff80002a7adf90,1) at process_new+0x3cb fork1(ffff80002a7ec548,1,ffffffff81b37860,0,ffff80002a88b1c0,0) at fork1+0x3f2 syscall(ffff80002a88b270) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761277fb3f10, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 panic(ffffffff833e1c6d) at panic+0x1cf malloc(528,64,1) at malloc+0xdb6 process_new(ffff80002a834a88,ffff80002a7adf90,1) at process_new+0x3cb fork1(ffff80002a7ec548,1,ffffffff81b37860,0,ffff80002a88b1c0,0) at fork1+0x3f2 syscall(ffff80002a88b270) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761277fb3f10, count: -7