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path: root/drivers/android/binder_alloc.c
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Diffstat (limited to 'drivers/android/binder_alloc.c')
-rw-r--r--drivers/android/binder_alloc.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c
index 6d79a1b0d446..eb76a823fbb2 100644
--- a/drivers/android/binder_alloc.c
+++ b/drivers/android/binder_alloc.c
@@ -22,6 +22,7 @@
#include <asm/cacheflush.h>
#include <linux/uaccess.h>
#include <linux/highmem.h>
+#include <linux/sizes.h>
#include "binder_alloc.h"
#include "binder_trace.h"
@@ -156,7 +157,7 @@ static struct binder_buffer *binder_alloc_prepare_to_free_locked(
}
/**
- * binder_alloc_buffer_lookup() - get buffer given user ptr
+ * binder_alloc_prepare_to_free() - get buffer given user ptr
* @alloc: binder_alloc for this proc
* @user_ptr: User pointer to buffer data
*
@@ -689,7 +690,9 @@ int binder_alloc_mmap_handler(struct binder_alloc *alloc,
alloc->buffer = (void __user *)vma->vm_start;
mutex_unlock(&binder_alloc_mmap_lock);
- alloc->pages = kcalloc((vma->vm_end - vma->vm_start) / PAGE_SIZE,
+ alloc->buffer_size = min_t(unsigned long, vma->vm_end - vma->vm_start,
+ SZ_4M);
+ alloc->pages = kcalloc(alloc->buffer_size / PAGE_SIZE,
sizeof(alloc->pages[0]),
GFP_KERNEL);
if (alloc->pages == NULL) {
@@ -697,7 +700,6 @@ int binder_alloc_mmap_handler(struct binder_alloc *alloc,
failure_string = "alloc page array";
goto err_alloc_pages_failed;
}
- alloc->buffer_size = vma->vm_end - vma->vm_start;
buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
if (!buffer) {