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drivers: staging: ion: fix error check in check_valid_vmid

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check_valid_vmid makes an incorrect assumption on the return
value of ion_msm_page_pool_alloc causing an incorrect pointer
access later in ion_msm_page_pool_add.

Change-Id: I45dc78978385498366ba729b447ec365a31474d8
Fixes: cae595f476 ("ion: Check for valid vmids for msm system heap")
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
This commit is contained in:
Vinayak Menon 2021-03-17 13:47:55 +05:30
commit 2cc23e8e19
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/android/ion/heaps/ion_msm_system_heap.c
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@ -3,7 +3,7 @@
* ION Memory Allocator system heap exporter
*
* Copyright (C) 2011 Google, Inc.
* Copyright (c) 2011-2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2011-2021, The Linux Foundation. All rights reserved.
*
*/
@ -291,7 +291,7 @@ static bool check_valid_vmid(int dest_vmid, struct ion_msm_system_heap *sys_heap
page = ion_msm_page_pool_alloc(sys_heap->uncached_pools[order_ind],
&from_pool);
if (!page)
if (IS_ERR(page))
return false;
if (!from_pool)