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kernel: unregister sysfs for module's ext4 image

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weishu
2025-02-17 21:06:21 +08:00
parent 38dc2eb4f0
commit de291151f1
1 changed files with 19 additions and 0 deletions
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19
kernel/core_hook.c
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@@ -224,6 +224,24 @@ int ksu_handle_rename(struct dentry *old_dentry, struct dentry *new_dentry)
return 0; return 0;
} }
static void nuke_ext4_sysfs() {
struct path path;
int err = kern_path("/data/adb/modules", 0, &path);
if (err) {
pr_err("nuke path err: %d\n", err);
return;
}
struct super_block* sb = path.dentry->d_inode->i_sb;
const char* name = sb->s_type->name;
if (strcmp(name, "ext4") != 0) {
pr_info("nuke but module aren't mounted\n");
return;
}
ext4_unregister_sysfs(sb);
}
int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3, int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
unsigned long arg4, unsigned long arg5) unsigned long arg4, unsigned long arg5)
{ {
@@ -318,6 +336,7 @@ int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
case EVENT_MODULE_MOUNTED: { case EVENT_MODULE_MOUNTED: {
ksu_module_mounted = true; ksu_module_mounted = true;
pr_info("module mounted!\n"); pr_info("module mounted!\n");
nuke_ext4_sysfs();
break; break;
} }
default: default: