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ANDROID: 16K: ashmem: Fix size check

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In page-compat mode, all VMAs are forced to be a multiple of
the emulated page-size.

Bug: 383389337
Bug: 315325080
Bug: 302403436
Change-Id: I5c083cedc15c6837803efa497450c4df5331968f
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
This commit is contained in:
Kalesh Singh
2023-11-09 23:21:07 -08:00
committed by Carlos Llamas
parent df9123472f
commit a1e630ea0d
1 changed files with 2 additions and 1 deletions
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drivers/staging/android/ashmem.c
+2 -1
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@@ -20,6 +20,7 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/mman.h> #include <linux/mman.h>
#include <linux/uaccess.h> #include <linux/uaccess.h>
#include <linux/page_size_compat.h>
#include <linux/personality.h> #include <linux/personality.h>
#include <linux/bitops.h> #include <linux/bitops.h>
#include <linux/mutex.h> #include <linux/mutex.h>
@@ -386,7 +387,7 @@ static int ashmem_mmap(struct file *file, struct vm_area_struct *vma)
} }
/* requested mapping size larger than object size */ /* requested mapping size larger than object size */
if (vma->vm_end - vma->vm_start > PAGE_ALIGN(asma->size)) { if (vma->vm_end - vma->vm_start > __PAGE_ALIGN(asma->size)) {
ret = -EINVAL; ret = -EINVAL;
goto out; goto out;
} }