website/docs/guide: Enable KernelSU support (CONFIG_KSU) (#1274)
### enable CONFIG_KSU on the website documentation. Added support for KernelSU by enabling CONFIG_KSU in the kernel defconfig located at `arch/arm64/configs/vendor/your_defconfig`. Please ensure to verify the correct location of the file. Note that on some devices, the defconfig may be located in `arch/arm64/configs`. --------- Signed-off-by: 明 <akariondev@gmail.com> Signed-off-by: akari <akariondev@gmail.com>
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明
GitHub
@@ -62,10 +62,17 @@ curl -LSs "https://raw.githubusercontent.com/tiann/KernelSU/main/kernel/setup.sh
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:::
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Then, add KernelSU calls to the kernel source, here is a patch to refer:
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Keep in mind that on some devices, your defconfig may be in `arch/arm64/configs` or in other cases `arch/arm64/configs/vendor/your_defconfig`. For example in your defconfig, Enable `CONFIG_KSU` with y to enable, or n to disable. Your path will be something like:
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`arch/arm64/configs/...`
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```sh
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+# KernelSU
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+CONFIG_KSU=y
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```
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::: code-group
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Then, add KernelSU calls to the kernel source, here is a patch to refer:
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```diff[exec.c]
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diff --git a/fs/exec.c b/fs/exec.c
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index ac59664eaecf..bdd585e1d2cc 100644
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@@ -74,21 +81,25 @@ index ac59664eaecf..bdd585e1d2cc 100644
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@@ -1890,11 +1890,14 @@ static int __do_execve_file(int fd, struct filename *filename,
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return retval;
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}
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+#ifdef CONFIG_KSU
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+extern bool ksu_execveat_hook __read_mostly;
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+extern int ksu_handle_execveat(int *fd, struct filename **filename_ptr, void *argv,
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+ void *envp, int *flags);
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+extern int ksu_handle_execveat_sucompat(int *fd, struct filename **filename_ptr,
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+ void *argv, void *envp, int *flags);
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+#endif
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static int do_execveat_common(int fd, struct filename *filename,
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struct user_arg_ptr argv,
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struct user_arg_ptr envp,
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int flags)
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{
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+ #ifdef CONFIG_KSU
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+ if (unlikely(ksu_execveat_hook))
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+ ksu_handle_execveat(&fd, &filename, &argv, &envp, &flags);
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+ else
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+ ksu_handle_execveat_sucompat(&fd, &filename, &argv, &envp, &flags);
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+ #endif
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return __do_execve_file(fd, filename, argv, envp, flags, NULL);
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}
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```
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@@ -100,9 +111,11 @@ index 05036d819197..965b84d486b8 100644
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@@ -348,6 +348,8 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
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return ksys_fallocate(fd, mode, offset, len);
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}
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+#ifdef CONFIG_KSU
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+extern int ksu_handle_faccessat(int *dfd, const char __user **filename_user, int *mode,
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+ int *flags);
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+#endif
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/*
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* access() needs to use the real uid/gid, not the effective uid/gid.
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* We do this by temporarily clearing all FS-related capabilities and
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@@ -117,8 +130,9 @@ index 05036d819197..965b84d486b8 100644
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struct vfsmount *mnt;
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int res;
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unsigned int lookup_flags = LOOKUP_FOLLOW;
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+ #ifdef CONFIG_KSU
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+ ksu_handle_faccessat(&dfd, &filename, &mode, NULL);
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+ #endif
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if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */
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return -EINVAL;
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@@ -131,16 +145,19 @@ index 650fc7e0f3a6..55be193913b6 100644
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@@ -434,10 +434,14 @@ ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
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}
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EXPORT_SYMBOL(kernel_read);
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+#ifdef CONFIG_KSU
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+extern bool ksu_vfs_read_hook __read_mostly;
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+extern int ksu_handle_vfs_read(struct file **file_ptr, char __user **buf_ptr,
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+ size_t *count_ptr, loff_t **pos);
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+#endif
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ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
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{
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ssize_t ret;
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+ #ifdef CONFIG_KSU
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+ if (unlikely(ksu_vfs_read_hook))
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+ ksu_handle_vfs_read(&file, &buf, &count, &pos);
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+ #endif
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+
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if (!(file->f_mode & FMODE_READ))
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return -EBADF;
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@@ -154,8 +171,10 @@ index 376543199b5a..82adcef03ecc 100644
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@@ -148,6 +148,8 @@ int vfs_statx_fd(unsigned int fd, struct kstat *stat,
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}
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EXPORT_SYMBOL(vfs_statx_fd);
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+#ifdef CONFIG_KSU
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+extern int ksu_handle_stat(int *dfd, const char __user **filename_user, int *flags);
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+#endif
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+
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/**
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* vfs_statx - Get basic and extra attributes by filename
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@@ -163,8 +182,10 @@ index 376543199b5a..82adcef03ecc 100644
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@@ -170,6 +172,7 @@ int vfs_statx(int dfd, const char __user *filename, int flags,
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int error = -EINVAL;
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unsigned int lookup_flags = LOOKUP_FOLLOW | LOOKUP_AUTOMOUNT;
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+ #ifdef CONFIG_KSU
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+ ksu_handle_stat(&dfd, &filename, &flags);
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+ #endif
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if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |
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AT_EMPTY_PATH | KSTAT_QUERY_FLAGS)) != 0)
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return -EINVAL;
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@@ -198,8 +219,9 @@ index 068fdbcc9e26..5348b7bb9db2 100644
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@@ -94,6 +96,8 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat,
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int error = -EINVAL;
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unsigned int lookup_flags = 0;
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+ #ifdef CONFIG_KSU
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+ ksu_handle_stat(&dfd, &filename, &flag);
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+ #endif
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+
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if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |
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AT_EMPTY_PATH)) != 0)
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@@ -216,9 +238,11 @@ index 2ff887661237..e758d7db7663 100644
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@@ -355,6 +355,9 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
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return error;
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}
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+#ifdef CONFIG_KSU
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+extern int ksu_handle_faccessat(int *dfd, const char __user **filename_user, int *mode,
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+ int *flags);
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+#endif
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+
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/*
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* access() needs to use the real uid/gid, not the effective uid/gid.
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@@ -226,8 +250,9 @@ index 2ff887661237..e758d7db7663 100644
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@@ -370,6 +373,8 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)
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int res;
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unsigned int lookup_flags = LOOKUP_FOLLOW;
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+ #ifdef CONFIG_KSU
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+ ksu_handle_faccessat(&dfd, &filename, &mode, NULL);
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+ #endif
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+
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if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */
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return -EINVAL;
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@@ -247,17 +272,20 @@ index 45306f9ef247..815091ebfca4 100755
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@@ -367,10 +367,13 @@ static int input_get_disposition(struct input_dev *dev,
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return disposition;
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}
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+#ifdef CONFIG_KSU
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+extern bool ksu_input_hook __read_mostly;
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+extern int ksu_handle_input_handle_event(unsigned int *type, unsigned int *code, int *value);
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+#endif
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+
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static void input_handle_event(struct input_dev *dev,
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unsigned int type, unsigned int code, int value)
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{
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int disposition = input_get_disposition(dev, type, code, &value);
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+
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+ #ifdef CONFIG_KSU
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+ if (unlikely(ksu_input_hook))
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+ ksu_handle_input_handle_event(&type, &code, &value);
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+ #endif
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if (disposition != INPUT_IGNORE_EVENT && type != EV_SYN)
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add_input_randomness(type, code, value);
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