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48 lines
1.6 KiB
Diff
48 lines
1.6 KiB
Diff
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From 37b3cefe6c01bed2e048d7a42b1c4021f4ba279d Mon Sep 17 00:00:00 2001
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From: Liam Mark <lmark@codeaurora.org>
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Date: Wed, 12 Oct 2016 14:22:56 -0700
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Subject: ion: disable system contig heap
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A malicious application can take advantage of the ION contig heap to
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create a specific memory chunk size to exercise a rowhammer attack on the
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physical hardware.
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So remove support for the ION contig heap.
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Change-Id: I9cb454cebb74df291479cecc3533d2c684363f77
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Signed-off-by: Liam Mark <lmark@codeaurora.org>
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Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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Signed-off-by: Meghana Ashok <meghanaa@codeaurora.org>
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---
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drivers/gpu/ion/ion_heap.c | 8 +++++---
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1 file changed, 5 insertions(+), 3 deletions(-)
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diff --git a/drivers/gpu/ion/ion_heap.c b/drivers/gpu/ion/ion_heap.c
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index 98c1a8c..061e22a 100644
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--- a/drivers/gpu/ion/ion_heap.c
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+++ b/drivers/gpu/ion/ion_heap.c
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@@ -26,8 +26,9 @@ struct ion_heap *ion_heap_create(struct ion_platform_heap *heap_data)
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switch ((int) heap_data->type) {
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case ION_HEAP_TYPE_SYSTEM_CONTIG:
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- heap = ion_system_contig_heap_create(heap_data);
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- break;
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+ pr_err("%s: Heap type is disabled: %d\n", __func__,
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+ heap_data->type);
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+ return ERR_PTR(-EINVAL);
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case ION_HEAP_TYPE_SYSTEM:
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heap = ion_system_heap_create(heap_data);
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break;
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@@ -71,7 +72,8 @@ void ion_heap_destroy(struct ion_heap *heap)
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switch ((int) heap->type) {
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case ION_HEAP_TYPE_SYSTEM_CONTIG:
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- ion_system_contig_heap_destroy(heap);
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+ pr_err("%s: Heap type is disabled: %d\n", __func__,
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+ heap->type);
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break;
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case ION_HEAP_TYPE_SYSTEM:
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ion_system_heap_destroy(heap);
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--
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cgit v1.1
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