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tegra: nvmap: Fix overflow CERT defects in nvmap_alloc.c

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Fix addition overflow defects in nvmap_alloc.c by using overflow.h APIs.
Fix 4 CERT INT 08-C and 3 CERT INT 30-C defects.

Bug 4479044

Change-Id: Id4f9d8a5fd15e3ded38d31b58c8ab3693ab1707e
Signed-off-by: N V S Abhishek <nabhishek@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3262969
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Ketan Patil <ketanp@nvidia.com>
This commit is contained in:
N V S Abhishek
2024-12-06 00:14:59 +00:00
committed by Jon Hunter
parent ff48ee63b1
commit 976ca5efb1
1 changed files with 11 additions and 2 deletions
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13
drivers/video/tegra/nvmap/nvmap_alloc.c
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@@ -102,6 +102,7 @@ static int handle_page_alloc(struct nvmap_client *client,
int i = 0, page_index = 0, allocated = 0;
struct page **pages;
gfp_t gfp = GFP_NVMAP | __GFP_ZERO;
u64 result;
#ifdef CONFIG_ARM64_4K_PAGES
#ifdef NVMAP_CONFIG_PAGE_POOLS
int pages_per_big_pg = NVMAP_PP_BIG_PAGE_SIZE >> PAGE_SHIFT;
@@ -152,7 +153,11 @@ static int handle_page_alloc(struct nvmap_client *client,
pages[i + idx] = nth_page(page, idx);
nvmap_clean_cache(&pages[i], pages_per_big_pg);
}
nvmap_big_page_allocs += page_index;
if (check_add_overflow(nvmap_big_page_allocs, (u64)page_index, &result))
goto fail;
nvmap_big_page_allocs = result;
#endif /* CONFIG_ARM64_4K_PAGES */
#ifdef NVMAP_CONFIG_PAGE_POOLS
/* Get as many pages from the pool as possible. */
@@ -174,7 +179,11 @@ static int handle_page_alloc(struct nvmap_client *client,
if (pages[i] == NULL)
goto fail;
}
nvmap_total_page_allocs += nr_page;
if (check_add_overflow(nvmap_big_page_allocs, (u64)nr_page, &result))
goto fail;
nvmap_total_page_allocs = result;
}
/*