login: guard_probe: __guard=0xaff handler=0xffffffff80b978c0 (symbol exported, value == compile-time constant 0x00000aff) panic: stack overflow in function guard_panic_smash_test cpuid = 3 Trace beginning at frame 0xfffff8011855b7c8 __stack_smash_handler() at __stack_smash_handler+0x15 0xffffffff80b978d5 __stack_smash_handler() at __stack_smash_handler+0x15 0xffffffff80b978d5 guard_panic_load() at guard_panic_load+0x33 0xffffffff82600033 module_register_init() at module_register_init+0x49 0xffffffff806232e9 linker_load_file.part.3() at linker_load_file.part.3+0x1b9 0xffffffff80624619 linker_load_module() at linker_load_module+0x116 0xffffffff80625e16 Debugger("panic") CPU3 stopping CPUs: 0x00000037 stopped Stopped at Debugger+0x7c: movb $0,0xbdaf09(%rip) db>