Warning: Permanently added '10.128.1.25' (ED25519) to the list of known hosts. 2026/09/07 14:39:37 ignoring optional flag "type"="gce" 2026/09/07 14:39:38 parsed 1 programs 2026/09/07 14:39:39 executed programs: 0 panic: Data modified on freelist: word 4 of object 0xffff8000015c4000 size 0x494 previous type free (0x6563 != 0xdeadbeef) Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *139850 34126 0 0 0x4000000 0 syz-executor.5 db_enter() at db_enter+0x25 panic(ffffffff834567f9) at panic+0x1cf malloc(494,2,a) at malloc+0xdb6 disk_attach(ffff800000c44000,ffff800000c44048) at disk_attach+0xc0 vndioctl(2902,c0384600,ffff80002a9192b0,1,ffff80002a871250) at vndioctl+0x1123 VOP_IOCTL(fffff8007372ba80,c0384600,ffff80002a9192b0,1,fffff80007ffd3a8,ffff80002a871250) at VOP_IOCTL+0xa3 vn_ioctl(fffff8000a1f4528,c0384600,ffff80002a9192b0,ffff80002a871250) at vn_ioctl+0xea sys_ioctl(ffff80002a871250,ffff80002a919480,ffff80002a9193d0) at sys_ioctl+0x660 syscall(ffff80002a919480) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4486ce29e80, count: 5 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 0xffff8000015c4000 size 0x494 previous type free (0x6563 != 0xdeadbeef) ddb> show kasan No such command ddb> trace db_enter() at db_enter+0x25 panic(ffffffff834567f9) at panic+0x1cf malloc(494,2,a) at malloc+0xdb6 disk_attach(ffff800000c44000,ffff800000c44048) at disk_attach+0xc0 vndioctl(2902,c0384600,ffff80002a9192b0,1,ffff80002a871250) at vndioctl+0x1123 VOP_IOCTL(fffff8007372ba80,c0384600,ffff80002a9192b0,1,fffff80007ffd3a8,ffff80002a871250) at VOP_IOCTL+0xa3 vn_ioctl(fffff8000a1f4528,c0384600,ffff80002a9192b0,ffff80002a871250) at vn_ioctl+0xea sys_ioctl(ffff80002a871250,ffff80002a919480,ffff80002a9193d0) at sys_ioctl+0x660 syscall(ffff80002a919480) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4486ce29e80, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a9188b0 rbx 0xffff8000015c4000 rdx 0x3fd rcx 0 rax 0x7c r8 0x101010101010101 r9 0x8080808080808080 r10 0x189e8f62def00f7 r11 0x244fc360968bcd6e r12 0 r13 0xffffffff83af27b0 kmemstats+0x80 r14 0 r15 0x1 rip 0xffffffff812d3e05 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a9188a0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor.5) tid=139850 pid=34126 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=67, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a871cb0,0xffff80002a870fc8 process=0xffff80002a8cdb18 user=0xffff80002a914000, vmspace=0xfffff80069fea010 estcpu=17, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 14561 359319 75450 0 2 0 0 syz-executor.4 14561 194151 75450 0 3 0 0x4000080 fsleep syz-executor.4 27874 26779 47890 0 2 0 0 syz-executor.3 27874 522724 47890 0 3 0 0x4000000 biowait syz-executor.3 69497 61235 94995 0 2 0 0 syz-executor.1 69497 382867 94995 0 2 0 0x4000000 syz-executor.1 34126 464351 40897 0 2 0 0 syz-executor.5 *34126 139850 40897 0 7 0 0x4000000 syz-executor.5 82077 330119 74252 0 2 0 0 syz-executor.2 82077 357415 74252 0 3 0 0x4000080 fsleep syz-executor.2 30342 351600 9983 0 2 0 0 syz-executor.0 30342 453859 9983 0 3 0 0x4000080 fsleep syz-executor.0 61739 118514 77107 0 3 0x2 0 biowait syz-executor.7 75450 243131 77107 0 3 0x2 0x80 nanoslp syz-executor.4 40897 40898 77107 0 3 0x2 0x80 nanoslp syz-executor.5 91555 428728 77107 0 3 0x10000002 0x80 nanoslp syz-executor.6 47890 109915 77107 0 3 0x2 0x80 nanoslp syz-executor.3 74252 496909 77107 0 3 0x2 0x80 nanoslp syz-executor.2 94995 165348 77107 0 3 0x2 0x80 nanoslp syz-executor.1 9983 417276 77107 0 3 0x2 0x80 nanoslp syz-executor.0 77107 131451 3196 0 3 0x2 0x80 wait syz-execprog 77107 338578 3196 0 2 0x2 0x4000000 syz-execprog 77107 301322 3196 0 3 0x2 0x4000080 wait syz-execprog 77107 239782 3196 0 3 0x2 0x4000080 thrsleep syz-execprog 77107 314538 3196 0 3 0x2 0x4000080 wait syz-execprog 77107 521267 3196 0 3 0x2 0x4000080 thrsleep syz-execprog 77107 15899 3196 0 3 0x2 0x4000080 wait syz-execprog 77107 386698 3196 0 3 0x2 0x4000080 wait syz-execprog 77107 509408 3196 0 3 0x2 0x4000080 thrsleep syz-execprog 77107 448418 3196 0 3 0x2 0x4000080 wait syz-execprog 77107 162096 3196 0 3 0x2 0x4000080 wait syz-execprog 77107 519720 3196 0 3 0x2 0x4000080 wait syz-execprog 77107 318706 3196 0 3 0x2 0x4000080 kqread syz-execprog 3196 110164 53602 0 3 0x100002 0x88 sigsusp ksh 53602 507603 29649 0 3 0x10 0x88 kqread sshd-session 29649 86843 74670 0 3 0x12 0x80 kqread sshd-session 89912 58034 1 0 3 0x100003 0x80 ttyin getty 74670 315768 1 0 3 0 0x88 kqread sshd 64988 56500 27707 73 3 0x1100010 0x80 kqread syslogd 27707 265892 1 0 3 0x100002 0x80 sbwait syslogd 87038 344278 1 0 3 0x100000 0x80 kqread resolvd 23033 155025 73220 77 3 0x100012 0x80 kqread dhcpleased 33418 520805 73220 77 3 0x100012 0x80 kqread dhcpleased 73220 430888 1 0 3 0 0x80 kqread dhcpleased 24430 78635 0 0 3 0x14000 0x200 bored smr 88294 97227 0 0 2 0x14000 0x200 zerothread 99496 128039 0 0 3 0x14000 0x200 aiodoned aiodoned 90350 332192 0 0 3 0x14000 0x200 syncer update 62377 127515 0 0 3 0x14000 0x200 cleaner cleaner 54659 414252 0 0 3 0x14000 0x200 reaper reaper 3735 430313 0 0 3 0x14000 0x200 pgdaemon pagedaemon 29631 511330 0 0 3 0x14000 0x200 bored viomb 16990 420979 0 0 3 0x14000 0x40000200 acpi0 acpi0 74 483191 0 0 3 0x14000 0x200 bored softnet0 95072 485784 0 0 3 0x14000 0x200 bored systqmp 85919 371055 0 0 3 0x14000 0x200 bored systq 4836 476485 0 0 3 0x14000 0x40000200 tmoslp softclock 11833 134716 0 0 3 0x14000 0x40000200 idle0 1 329059 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11024 12104K 12118K 166960K 12198 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 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 16 57K 73K 166960K 275 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 6K 6K 166960K 110 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 6 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 459 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 155K 209K 166960K 5400 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 38 76K 104K 166960K 1804 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 11 0K 2K 166960K 30 0 temp 1 9104K 9112K 166960K 4992 0 kqueue 13 20K 20K 166960K 64 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 144 103 0 88 1 0 1 1 0 8 0 syncache 336 15 0 15 1 0 1 1 0 8 1 tcpcb 736 18 0 15 1 0 1 1 0 8 0 arp 96 20 0 2 1 0 1 1 0 8 0 inpcb 328 72 0 66 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 1871 0 385 94 0 94 94 0 8 0 ffsino 256 1871 0 385 94 0 94 94 0 8 0 nchpl 144 2398 0 611 67 0 67 67 0 8 0 vnodes 216 1881 0 0 105 0 105 105 0 8 0 namei 1024 9662 0 9660 3 0 3 3 0 8 2 kstatmem 264 25 0 2 2 0 2 2 0 8 0 scxspl 216 19113 0 19111 8 0 8 8 1 8 7 plimitpl 152 70 0 54 1 0 1 1 0 8 0 sigapl 424 660 0 618 6 0 6 6 0 8 0 knotepl 120 5685 0 5606 4 0 4 4 0 8 0 kqueuepl 184 60 0 51 1 0 1 1 0 8 0 pipepl 304 219 0 191 3 0 3 3 0 8 0 fdescpl 448 647 0 619 4 0 4 4 0 8 0 filepl 120 2772 0 2629 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 46 0 30 1 0 1 1 0 8 0 pgrppl 48 46 0 30 1 0 1 1 0 8 0 ucredpl 104 300 0 288 1 0 1 1 0 8 0 zombiepl 144 619 0 618 1 0 1 1 0 8 0 processpl 1152 660 0 618 4 0 4 4 0 8 0 procpl 664 819 0 759 6 0 6 6 0 8 0 sockpl 552 214 0 190 2 0 2 2 0 8 0 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 9055 0 8997 23 7 16 19 0 8 8 mcl2k 2048 200 0 200 1 0 1 1 0 8 1 mextrefs 64 70 0 70 1 0 1 1 0 8 1 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 13317 0 13152 11 0 11 11 0 8 0 bufpl 272 12973 0 6692 419 0 419 419 0 8 0 anonpl 24 217916 0 212993 60 0 60 60 0 187 28 amapchunkpl 152 15866 0 15264 30 0 30 30 0 158 5 amappl16 200 5204 0 5084 9 0 9 9 0 8 1 amappl15 192 75 0 75 1 0 1 1 0 8 1 amappl14 184 478 0 476 1 0 1 1 0 8 0 amappl13 176 278 0 267 2 0 2 2 0 8 0 amappl12 168 1006 0 977 2 0 2 2 0 8 0 amappl11 160 36 0 35 1 0 1 1 0 8 0 amappl10 152 122 0 102 1 0 1 1 0 8 0 amappl9 144 1104 0 1104 1 0 1 1 0 8 1 amappl8 136 206 0 179 1 0 1 1 0 8 0 amappl7 128 281 0 264 2 0 2 2 0 8 0 amappl6 120 245 0 239 1 0 1 1 0 8 0 amappl5 112 191 0 184 1 0 1 1 0 8 0 amappl4 104 558 0 539 2 0 2 2 0 8 1 amappl3 96 2500 0 2402 3 0 3 3 0 8 0 amappl2 88 1270 0 1211 5 0 5 5 0 8 2 amappl1 80 25479 0 24909 26 7 19 23 0 8 6 amappl 88 4162 0 3991 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 24 647 0 619 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 647 0 619 1 0 1 1 0 8 0 vmmpekpl 168 14533 0 14499 2 0 2 2 0 8 0 vmmpepl 168 83620 0 81772 124 0 124 124 0 357 41 vmsppl 368 646 0 619 3 0 3 3 0 8 0 rwobjpl 40 33963 0 32866 19 1 18 19 0 8 2 pdppl 4096 1300 0 1238 112 46 66 70 0 8 4 pvpl 32 626614 0 616232 458 150 308 445 0 265 221 pmappl 216 646 0 619 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 803 0 53 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 panic(ffffffff834567f9) at panic+0x1cf malloc(494,2,a) at malloc+0xdb6 disk_attach(ffff800000c44000,ffff800000c44048) at disk_attach+0xc0 vndioctl(2902,c0384600,ffff80002a9192b0,1,ffff80002a871250) at vndioctl+0x1123 VOP_IOCTL(fffff8007372ba80,c0384600,ffff80002a9192b0,1,fffff80007ffd3a8,ffff80002a871250) at VOP_IOCTL+0xa3 vn_ioctl(fffff8000a1f4528,c0384600,ffff80002a9192b0,ffff80002a871250) at vn_ioctl+0xea sys_ioctl(ffff80002a871250,ffff80002a919480,ffff80002a9193d0) at sys_ioctl+0x660 syscall(ffff80002a919480) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4486ce29e80, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 panic(ffffffff834567f9) at panic+0x1cf malloc(494,2,a) at malloc+0xdb6 disk_attach(ffff800000c44000,ffff800000c44048) at disk_attach+0xc0 vndioctl(2902,c0384600,ffff80002a9192b0,1,ffff80002a871250) at vndioctl+0x1123 VOP_IOCTL(fffff8007372ba80,c0384600,ffff80002a9192b0,1,fffff80007ffd3a8,ffff80002a871250) at VOP_IOCTL+0xa3 vn_ioctl(fffff8000a1f4528,c0384600,ffff80002a9192b0,ffff80002a871250) at vn_ioctl+0xea sys_ioctl(ffff80002a871250,ffff80002a919480,ffff80002a9193d0) at sys_ioctl+0x660 syscall(ffff80002a919480) at syscall+0x962 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4486ce29e80, count: -10