Android 12 hook 后 cfi_check 崩溃显著增加

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
android, c
Domain
mobile-dev, operating-systems

Research direction

Review the bytehook_hook_partial calls for libc sendto and recvfrom, the allow_filter function, and the difference between delayed hooking and the Application.onCreate timing used by the example. Reproduce on Android 12 with armeabi-v7a if possible; done means identifying the conditions associated with the increased cfi_check crashes and documenting a confirmed cause or a minimal reproduction.

Written by the indexing model from the issue text.

Description

bug
bytehook Version

1.0.10

Android OS Version

12

Android ABIs

armeabi-v7a

Device Manufacturers and Models

定制安卓设备

Describe the Bug

image
目前遇到的情况是，启用hook后，极易出现 cfi_check 崩溃，关闭后则几乎不会出现 cfi_check 崩溃。希望获得大佬的指定和帮助。

hook代码如下，对libc的socket接口进行了hook。其他一切配置都是按照例子里面的调用方法。
有一点疑惑的点：调用hook的时机不是在 Application.onCreate. 而是在App启动后的一段时间才hook的，和例子有些不同，不知道这样调用会有什么影响。

static bool allow_filter(const char *caller_path_name, void *arg) {
    (void)arg;

    if (NULL != strstr(caller_path_name, "libc.so")) return false;
    if (NULL != strstr(caller_path_name, "libbase.so")) return false;
    if (NULL != strstr(caller_path_name, "liblog.so")) return false;
    if (NULL != strstr(caller_path_name, "libunwindstack.so")) return false;
    if (NULL != strstr(caller_path_name, "libutils.so")) return false;
    // ......

    return true;
}

if (!sock_sendto_stub) {
        sock_sendto_stub = bytehook_hook_partial(allow_filter, NULL, "libc.so", "sendto" , sock_sendto_proxy_auto, sock_sendto_hooked_callback, NULL);
    }
    if (!sock_recvfrom_stub) {
        sock_recvfrom_stub = bytehook_hook_partial(allow_filter, NULL, "libc.so", "recvfrom" , sock_recvfrom_proxy_auto, sock_recvfrom_hooked_callback, NULL);
    }
Dominant language
C
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