error-inject.c

 1// SPDX-License-Identifier: GPL-2.0
 2
 3#include <linux/error-injection.h>
 4#include <linux/kprobes.h>
 5
 6void override_function_with_return(struct pt_regs *regs)
 7{
 8	/*
 9	 * 'regs' represents the state on entry of a predefined function in
10	 * the kernel/module and which is captured on a kprobe.
11	 *
12	 * When kprobe returns back from exception it will override the end
13	 * of probed function and directly return to the predefined
14	 * function's caller.
15	 */
16	instruction_pointer_set(regs, procedure_link_pointer(regs));
17}
18NOKPROBE_SYMBOL(override_function_with_return);