O"'n+xmRj~s7cubHj#¨\$–BNBC@$panic: malloc: allocation too large, type = 2, size = 18446744073709550976 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *283521 59729 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 malloc(fffffffffffffd80,2,a) at malloc+0x9c9 sys/kern/kern_malloc.c:344 vm_get_info(ffff800015942be0) at vm_get_info+0x9a VOP_IOCTL(fffffd80361be4e0,c0185603,ffff800015942be0,b,fffffd803f7c6960,ffff80001595e9f8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802ec4b628,c0185603,ffff800015942be0,ffff80001595e9f8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 sys_ioctl(ffff80001595e9f8,ffff800015942cf8,ffff800015942d40) at sys_ioctl+0x5b9 syscall(ffff800015942dc0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff53,0,3,877b6368010) at Xsyscall+0x128 end of kernel end trace frame: 0x87a4f818020, count: 6 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.