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video: tegra: nvmap: Fix INT30-C overflow defects

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Adding check for overflow in nvmap_heap.c when two unsigned integers are added and return error in case of overflow condition

JIRA: TMM-5724
Bug 4479044

Change-Id: I4da3f31a508de8e4d6fab033e5a149de6b423ead
Signed-off-by: Surbhi Singh <surbhis@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3241765
Reviewed-by: Ketan Patil <ketanp@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Surbhi Singh
2024-11-04 03:36:56 +00:00
committed by Jon Hunter
parent 238299ffb5
commit 80c3e3003f
1 changed files with 5 additions and 1 deletions
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6
drivers/video/tegra/nvmap/nvmap_heap.c
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@@ -1052,6 +1052,7 @@ void nvmap_heap_destroy(struct nvmap_heap *heap)
int nvmap_heap_init(void) int nvmap_heap_init(void)
{ {
ulong start_time = sched_clock(); ulong start_time = sched_clock();
ulong sum;
heap_block_cache = KMEM_CACHE(list_block, 0); heap_block_cache = KMEM_CACHE(list_block, 0);
if (!heap_block_cache) { if (!heap_block_cache) {
@@ -1059,7 +1060,10 @@ int nvmap_heap_init(void)
return -ENOMEM; return -ENOMEM;
} }
pr_info("%s: created heap block cache\n", __func__); pr_info("%s: created heap block cache\n", __func__);
nvmap_init_time += sched_clock() - start_time; if (check_add_overflow((ulong)sched_clock() - start_time, nvmap_init_time, &sum))
return -EOVERFLOW;
nvmap_init_time = sum;
return 0; return 0;
} }