From d13a3e5d1b60cef3ea949f904e86e256829d0a2c Mon Sep 17 00:00:00 2001
From: Rajesh Kemisetti <rajeshk@codeaurora.org>
Date: Tue, 12 Apr 2016 23:17:10 -0700
Subject: [PATCH] msm: kgsl: Add missing checks for alloc size and sglen
In _kgsl_sharedmem_page_alloc():
- Make len of type size_t to be in line with size.
- Check for boundary limits of requested alloc size before honoring.
- Make sure sglen is greater than zero before marking it as end
of sg list.
BUG=27475454
Change-Id: I8e18aad2118f58ce677050ff4c4a4b0823c4b4b3
---
drivers/gpu/msm/kgsl_sharedmem.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/msm/kgsl_sharedmem.c b/drivers/gpu/msm/kgsl_sharedmem.c
index 73c263bcf56a..4aec22b45033 100644
--- a/drivers/gpu/msm/kgsl_sharedmem.c
+++ b/drivers/gpu/msm/kgsl_sharedmem.c
@@ -580,10 +580,15 @@ _kgsl_sharedmem_page_alloc(struct kgsl_memdesc *memdesc,
size_t size)
{
int order, ret = 0;
- int len, sglen_alloc, sglen = 0;
+ int sglen_alloc, sglen = 0;
+ size_t len;
void *ptr;
unsigned int align;
+ size = PAGE_ALIGN(size);
+ if (size == 0 || size > UINT_MAX)
+ return -EINVAL;
+
align = (memdesc->flags & KGSL_MEMALIGN_MASK) >> KGSL_MEMALIGN_SHIFT;
/*
--
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