修改android内核反调试标志

第一处 msm/fs/proc/base.c文件 273行 proc_pid_wchan 函数修改为（主要对285行进行了修改）

static int proc_pid_wchan(struct task_struct *task, char *buffer)
{
    unsigned long wchan;
    char symname[KSYM_NAME_LEN];

    wchan = get_wchan(task);

    if (lookup_symbol_name(wchan, symname) < 0)
        if (!ptrace_may_access(task, PTRACE_MODE_READ))
            return 0;
        else
            return sprintf(buffer, "%lu", wchan);
    else{
        if (strstr(symname, "trace")) {
            return sprintf(buffer, "%s", "sys_epoll_wait");
        }
        return sprintf(buffer, "%s", symname);
    }
}

第二处 msm/fs/proc/array.c 文件 134行

static const char * const task_state_array[] = {
    "R (running)",      /*   0 */
    "S (sleeping)",     /*   1 */
    "D (disk sleep)",   /*   2 */
    "T (stopped)",      /*   4 */
    "t (tracing stop)", /*   8 */
    "Z (zombie)",       /*  16 */
    "X (dead)",     /*  32 */
    "x (dead)",     /*  64 */
    "K (wakekill)",     /* 128 */
    "W (waking)",       /* 256 */
};

修改后

static const char * const task_state_array[] = {
    "R (running)",      /*   0 */
    "S (sleeping)",     /*   1 */
    "D (disk sleep)",   /*   2 */
    "S (sleeping)",     /*   4 */
    "S (sleeping)",     /*   8 */
    "Z (zombie)",       /*  16 */
    "X (dead)",     /*  32 */
    "x (dead)",     /*  64 */
    "K (wakekill)",     /* 128 */
    "W (waking)",       /* 256 */
};

第三处 msm/fs/proc/array.c 文件 180行

    seq_printf(m,
        "State:\t%s\n"
        "Tgid:\t%d\n"
        "Pid:\t%d\n"
        "PPid:\t%d\n"
        "TracerPid:\t%d\n"
        "Uid:\t%d\t%d\t%d\t%d\n"
        "Gid:\t%d\t%d\t%d\t%d\n",
        get_task_state(p),
        task_tgid_nr_ns(p, ns),
        pid_nr_ns(pid, ns),
        ppid, /*tpid*/
                0,
        cred->uid, cred->euid, cred->suid, cred->fsuid,
        cred->gid, cred->egid, cred->sgid, cred->fsgid);

原文地址：https://blog.51cto.com/haidragon/2404656