kernel:Add Huawei hisi check (#1545)

Use huawei_hisi_check.h to determine whether it is an old Huawei
HiSilicon device.
Solve:  
1. Compatible with non-GKI Huawei HiSilicon devices
2. Solve different bugs in EMUI of different system versions
3. Does not affect other devices

kernel/core_hook.c

@@ -618,7 +618,7 @@ static int ksu_task_prctl(int option, unsigned long arg2, unsigned long arg3,
 	return -ENOSYS;
 }
 // kernel 4.4 and 4.9
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) || defined(CONFIG_IS_HW_HISI)
 static int ksu_key_permission(key_ref_t key_ref, const struct cred *cred,
 			      unsigned perm)
 {
@@ -651,7 +651,7 @@ static struct security_hook_list ksu_hooks[] = {
 	LSM_HOOK_INIT(task_prctl, ksu_task_prctl),
 	LSM_HOOK_INIT(inode_rename, ksu_inode_rename),
 	LSM_HOOK_INIT(task_fix_setuid, ksu_task_fix_setuid),
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) || defined(CONFIG_IS_HW_HISI)
 	LSM_HOOK_INIT(key_permission, ksu_key_permission)
 #endif
 };

kernel/kernel_compat.c

@@ -8,8 +8,9 @@
 #endif
 #include "linux/uaccess.h"
 #include "klog.h" // IWYU pragma: keep
+#include "kernel_compat.h" // Add check Huawei Device
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) || defined(CONFIG_IS_HW_HISI)
 #include "linux/key.h"
 #include "linux/errno.h"
 #include "linux/cred.h"
@@ -78,7 +79,7 @@ void ksu_android_ns_fs_check()
 
 struct file *ksu_filp_open_compat(const char *filename, int flags, umode_t mode)
 {
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) || defined(CONFIG_IS_HW_HISI)
 	if (init_session_keyring != NULL && !current_cred()->session_keyring &&
 	    (current->flags & PF_WQ_WORKER)) {
 		pr_info("installing init session keyring for older kernel\n");

kernel/kernel_compat.h

@@ -4,12 +4,27 @@
 #include "linux/fs.h"
 #include "linux/key.h"
 #include "linux/version.h"
+#include "ss/policydb.h"
+
+/*
+ * Adapt to Huawei HISI kernel without affecting other kernels ,
+ * Huawei Hisi Kernel EBITMAP Enable or Disable Flag ,
+ * From ss/ebitmap.h
+ */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0)) &&                           \
+		(LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)) ||               \
+	(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)) &&                      \
+		(LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0))
+#ifdef HISI_SELINUX_EBITMAP_RO
+#define CONFIG_IS_HW_HISI
+#endif
+#endif
 
 extern long ksu_strncpy_from_user_nofault(char *dst,
 					  const void __user *unsafe_addr,
 					  long count);
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) || defined(CONFIG_IS_HW_HISI)
 extern struct key *init_session_keyring;
 #endif
 

kernel/selinux/sepolicy.c

@@ -6,23 +6,10 @@
 
 #include "../klog.h" // IWYU pragma: keep
 #include "ss/symtab.h"
+#include "../kernel_compat.h" // Add check Huawei Device
 
 #define KSU_SUPPORT_ADD_TYPE
 
-/*
- * Adapt to Huawei HISI kernel without affecting other kernels ,
- * Huawei Hisi Kernel EBITMAP Enable or Disable Flag ,
- * From ss/ebitmap.h
- */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0) &&                           \
-		LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) ||               \
-	LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) &&                      \
-		LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
-#ifdef HISI_SELINUX_EBITMAP_RO
-#define CONFIG_IS_HW_HISI
-#endif
-#endif
-
 //////////////////////////////////////////////////////
 // Declaration
 //////////////////////////////////////////////////////