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habanalabs: proper handling of alloc size in coresight 

Allocation size can go up to 64bit but truncated to 32bit,
we should make sure it is not truncated and validate no address
overflow.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Ofir Bitton 2020-08-06 11:33:27 +03:00 committed by Oded Gabbay
parent f44d23b909
commit 36545279f0
3 changed files with 15 additions and 3 deletions
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2
drivers/misc/habanalabs/common/habanalabs.h
View File

@ -1651,7 +1651,7 @@ struct hl_ioctl_desc {
*
* Return: true if the area is inside the valid range, false otherwise.
*/
static inline bool hl_mem_area_inside_range(u64 address, u32 size,
static inline bool hl_mem_area_inside_range(u64 address, u64 size,
u64 range_start_address, u64 range_end_address)
{
u64 end_address = address + size;

8
drivers/misc/habanalabs/gaudi/gaudi_coresight.c
View File

@ -527,7 +527,7 @@ static int gaudi_config_etf(struct hl_device *hdev,
}
static bool gaudi_etr_validate_address(struct hl_device *hdev, u64 addr,
u32 size, bool *is_host)
u64 size, bool *is_host)
{
struct asic_fixed_properties *prop = &hdev->asic_prop;
struct gaudi_device *gaudi = hdev->asic_specific;
@ -539,6 +539,12 @@ static bool gaudi_etr_validate_address(struct hl_device *hdev, u64 addr,
return false;
}
if (addr > (addr + size)) {
dev_err(hdev->dev,
"ETR buffer size %llu overflow\n", size);
return false;
}
/* PMMU and HPMMU addresses are equal, check only one of them */
if ((gaudi->hw_cap_initialized & HW_CAP_MMU) &&
hl_mem_area_inside_range(addr, size,

8
drivers/misc/habanalabs/goya/goya_coresight.c
View File

@ -362,11 +362,17 @@ static int goya_config_etf(struct hl_device *hdev,
}
static int goya_etr_validate_address(struct hl_device *hdev, u64 addr,
u32 size)
u64 size)
{
struct asic_fixed_properties *prop = &hdev->asic_prop;
u64 range_start, range_end;
if (addr > (addr + size)) {
dev_err(hdev->dev,
"ETR buffer size %llu overflow\n", size);
return false;
}
if (hdev->mmu_enable) {
range_start = prop->dmmu.start_addr;
range_end = prop->dmmu.end_addr;