binder: fix pointer cast warning

binder_uintptr_t is not the same as uintptr_t, so converting it into a
pointer requires a second cast:

drivers/android/binder.c: In function 'binder_translate_fd_array':
drivers/android/binder.c:2511:28: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
 2511 |         sender_ufda_base = (void __user *)sender_uparent->buffer + fda->parent_offset;
      |                            ^

Fixes: 656e01f3ab54 ("binder: read pre-translated fds from sender buffer")
Acked-by: Todd Kjos <tkjos@google.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20211207122448.1185769-1-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 5497797ab2581e7d937cd86dabb8487d3152763a..182bb4221b06115f72ed626a3b17d3ccbaa3ab6a 100644 (file)
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -2508,7 +2508,8 @@ static int binder_translate_fd_array(struct list_head *pf_head,
         */
        fda_offset = (parent->buffer - (uintptr_t)t->buffer->user_data) +
                fda->parent_offset;
-       sender_ufda_base = (void __user *)sender_uparent->buffer + fda->parent_offset;
+       sender_ufda_base = (void __user *)(uintptr_t)sender_uparent->buffer +
+                               fda->parent_offset;
 
        if (!IS_ALIGNED((unsigned long)fda_offset, sizeof(u32)) ||
            !IS_ALIGNED((unsigned long)sender_ufda_base, sizeof(u32))) {