KernelSU.patch

diff --git a/fs/exec.c b/fs/exec.c
index ac59664eaecf..bdd585e1d2cc 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1890,11 +1890,14 @@ static int __do_execve_file(int fd, struct filename *filename,
 	return retval;
 }

+#ifdef CONFIG_KSU
+extern bool ksu_execveat_hook __read_mostly;
+extern int ksu_handle_execveat(int *fd, struct filename **filename_ptr, void *argv,
+			void *envp, int *flags);
+extern int ksu_handle_execveat_sucompat(int *fd, struct filename **filename_ptr,
+				 void *argv, void *envp, int *flags);
+#endif
 static int do_execveat_common(int fd, struct filename *filename,
 			      struct user_arg_ptr argv,
 			      struct user_arg_ptr envp,
 			      int flags)
 {
+   #ifdef CONFIG_KSU
+	if (unlikely(ksu_execveat_hook))
+		ksu_handle_execveat(&fd, &filename, &argv, &envp, &flags);
+	else
+		ksu_handle_execveat_sucompat(&fd, &filename, &argv, &envp, &flags);
+   #endif
 	return __do_execve_file(fd, filename, argv, envp, flags, NULL);
 }


diff --git a/fs/open.c b/fs/open.c
index 05036d819197..965b84d486b8 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -348,6 +348,8 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
 	return ksys_fallocate(fd, mode, offset, len);
 }

+#ifdef CONFIG_KSU
+extern int ksu_handle_faccessat(int *dfd, const char __user **filename_user, int *mode,
+			 int *flags);
+#endif
 /*
  * access() needs to use the real uid/gid, not the effective uid/gid.
  * We do this by temporarily clearing all FS-related capabilities and
@@ -355,6 +357,7 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
  */
 long do_faccessat(int dfd, const char __user *filename, int mode)
 {
 	const struct cred *old_cred;
 	struct cred *override_cred;
 	struct path path;
 	struct inode *inode;
 	struct vfsmount *mnt;
 	int res;
 	unsigned int lookup_flags = LOOKUP_FOLLOW;
+   #ifdef CONFIG_KSU
+	ksu_handle_faccessat(&dfd, &filename, &mode, NULL);
+   #endif
 
 	if (mode & ~S_IRWXO)	/* where's F_OK, X_OK, W_OK, R_OK? */
 		return -EINVAL;


diff --git a/fs/read_write.c b/fs/read_write.c
index 650fc7e0f3a6..55be193913b6 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -434,10 +434,14 @@ ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
 }
 EXPORT_SYMBOL(kernel_read);

+#ifdef CONFIG_KSU
+extern bool ksu_vfs_read_hook __read_mostly;
+extern int ksu_handle_vfs_read(struct file **file_ptr, char __user **buf_ptr,
+			size_t *count_ptr, loff_t **pos);
+#endif
 ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
 {
 	ssize_t ret;
+   #ifdef CONFIG_KSU 
+	if (unlikely(ksu_vfs_read_hook))
+		ksu_handle_vfs_read(&file, &buf, &count, &pos);
+   #endif
+
 	if (!(file->f_mode & FMODE_READ))
 		return -EBADF;
 	if (!(file->f_mode & FMODE_CAN_READ))


diff --git a/fs/stat.c b/fs/stat.c
index 376543199b5a..82adcef03ecc 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -148,6 +148,8 @@ int vfs_statx_fd(unsigned int fd, struct kstat *stat,
 }
 EXPORT_SYMBOL(vfs_statx_fd);

+#ifdef CONFIG_KSU
+extern int ksu_handle_stat(int *dfd, const char __user **filename_user, int *flags);
+#endif
+
 /**
  * vfs_statx - Get basic and extra attributes by filename
  * @dfd: A file descriptor representing the base dir for a relative filename
@@ -170,6 +172,7 @@ int vfs_statx(int dfd, const char __user *filename, int flags,
 	int error = -EINVAL;
 	unsigned int lookup_flags = LOOKUP_FOLLOW | LOOKUP_AUTOMOUNT;

+   #ifdef CONFIG_KSU
+	ksu_handle_stat(&dfd, &filename, &flags);
+   #endif
 	if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |
 		       AT_EMPTY_PATH | KSTAT_QUERY_FLAGS)) != 0)
 		return -EINVAL;