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gpu: nvgpu: mm: fix CERT-C INT32 violations for page_table

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CERT-C INT32 states to ensure that operations on signed integers do not
overflow. In page_table.c, the parameter lvl was triggering INT32
violations when adding to the value.

To address these violations, do two things. First, since this is
really an unsigned value, make it a u32. And rather than just make the
INT32 violations INT30 violations, use the safe operations.

JIRA NVGPU-3515

Change-Id: Iabd5e239813c695638988143ee901b1c19a0df5d
Signed-off-by: Philip Elcan <pelcan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2125028
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vinod Gopalakrishnakurup <vinodg@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Philip Elcan
2019-05-24 11:56:56 -04:00
committed by mobile promotions
parent 49739b9ee4
commit 62c5ff5241
1 changed files with 12 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/gpu/nvgpu/common/mm/gmmu/page_table.c
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@@ -384,7 +384,7 @@ static int pd_allocate_children(struct vm_gk20a *vm,
*/
static int nvgpu_set_pd_level(struct vm_gk20a *vm,
struct nvgpu_gmmu_pd *pd,
int lvl,
u32 lvl,
u64 phys_addr,
u64 virt_addr, u64 length,
struct nvgpu_gmmu_attrs *attrs)
@@ -394,7 +394,8 @@ static int nvgpu_set_pd_level(struct vm_gk20a *vm,
struct gk20a *g = gk20a_from_vm(vm);
struct nvgpu_gmmu_pd *next_pd = NULL;
const struct gk20a_mmu_level *l = &vm->mmu_levels[lvl];
const struct gk20a_mmu_level *next_l = &vm->mmu_levels[lvl + 1];
const struct gk20a_mmu_level *next_l =
&vm->mmu_levels[nvgpu_safe_add_u32(lvl, 1)];
/*
* 5 levels for Pascal+. For pre-pascal we only have 2. This puts
@@ -483,7 +484,7 @@ static int nvgpu_set_pd_level(struct vm_gk20a *vm,
if (next_l->update_entry != NULL) {
err = nvgpu_set_pd_level(vm, next_pd,
lvl + 1,
nvgpu_safe_add_u32(lvl, 1U),
phys_addr,
virt_addr,
chunk_size,
@@ -532,7 +533,7 @@ static int nvgpu_gmmu_do_update_page_table(struct vm_gk20a *vm,
* address for the entire GPU range.
*/
err = nvgpu_set_pd_level(vm, &vm->pdb,
0,
0U,
0,
virt_addr, length,
attrs);
@@ -564,7 +565,7 @@ static int nvgpu_gmmu_do_update_page_table(struct vm_gk20a *vm,
io_addr = nvgpu_safe_add_u64(io_addr, space_to_skip);
err = nvgpu_set_pd_level(vm, &vm->pdb,
0,
0U,
io_addr,
virt_addr,
length,
@@ -657,7 +658,7 @@ static int nvgpu_gmmu_do_update_page_table(struct vm_gk20a *vm,
space_to_skip);
err = nvgpu_set_pd_level(vm, &vm->pdb,
0,
0U,
phys_addr,
virt_addr,
mapped_sgl_length,
@@ -959,7 +960,7 @@ u32 nvgpu_pte_words(struct gk20a *g)
*/
static int nvgpu_locate_pte(struct gk20a *g, struct vm_gk20a *vm,
struct nvgpu_gmmu_pd *pd,
u64 vaddr, int lvl,
u64 vaddr, u32 lvl,
struct nvgpu_gmmu_attrs *attrs,
u32 *data,
struct nvgpu_gmmu_pd **pd_out, u32 *pd_idx_out,
@@ -975,7 +976,7 @@ static int nvgpu_locate_pte(struct gk20a *g, struct vm_gk20a *vm,
do {
l = &vm->mmu_levels[lvl];
next_l = &vm->mmu_levels[lvl + 1];
next_l = &vm->mmu_levels[nvgpu_safe_add_u32(lvl, 1)];
pd_idx = pd_index(l, vaddr, attrs);
/*
* If this isn't the final level (i.e there's a valid next level)
@@ -996,7 +997,7 @@ static int nvgpu_locate_pte(struct gk20a *g, struct vm_gk20a *vm,
}
pd = pd_next;
lvl++;
lvl = nvgpu_safe_add_u32(lvl, 1);
} else {
if (pd->mem == NULL) {
return -EINVAL;
@@ -1047,7 +1048,7 @@ int nvgpu_get_pte(struct gk20a *g, struct vm_gk20a *vm, u64 vaddr, u32 *pte)
};
return nvgpu_locate_pte(g, vm, &vm->pdb,
vaddr, 0, &attrs,
vaddr, 0U, &attrs,
pte, NULL, NULL, NULL);
}
@@ -1064,7 +1065,7 @@ int nvgpu_set_pte(struct gk20a *g, struct vm_gk20a *vm, u64 vaddr, u32 *pte)
struct nvgpu_gmmu_attrs *attrs_ptr = &attrs;
err = nvgpu_locate_pte(g, vm, &vm->pdb,
vaddr, 0, &attrs,
vaddr, 0U, &attrs,
NULL, &pd, &pd_idx, &pd_offs);
if (err != 0) {
return err;