diff options
| author | Ofir Bitton <obitton@habana.ai> | 2020-08-11 09:19:53 +0300 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2020-08-22 12:47:58 +0300 |
| commit | bce382a8bb080ed5f2f3a06754526dc58b91cca2 (patch) | |
| tree | eb324ef760a64e0e547472509be01272d9bae437 /drivers/misc | |
| parent | 804d057cfae25c5447b36099fa59682d0d184ed6 (diff) | |
habanalabs: validate FW file size
We must validate FW size in order not to corrupt memory in case
a malicious FW file will be present in system.
Signed-off-by: Ofir Bitton <obitton@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/habanalabs/common/firmware_if.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/common/firmware_if.c b/drivers/misc/habanalabs/common/firmware_if.c index f70302cdab1b..f52bc690dfc5 100644 --- a/drivers/misc/habanalabs/common/firmware_if.c +++ b/drivers/misc/habanalabs/common/firmware_if.c @@ -13,6 +13,7 @@ #include <linux/io-64-nonatomic-lo-hi.h> #include <linux/slab.h> +#define FW_FILE_MAX_SIZE 0x1400000 /* maximum size of 20MB */ /** * hl_fw_load_fw_to_device() - Load F/W code to device's memory. * @@ -48,6 +49,14 @@ int hl_fw_load_fw_to_device(struct hl_device *hdev, const char *fw_name, dev_dbg(hdev->dev, "%s firmware size == %zu\n", fw_name, fw_size); + if (fw_size > FW_FILE_MAX_SIZE) { + dev_err(hdev->dev, + "FW file size %zu exceeds maximum of %u bytes\n", + fw_size, FW_FILE_MAX_SIZE); + rc = -EINVAL; + goto out; + } + fw_data = (const u64 *) fw->data; memcpy_toio(dst, fw_data, fw_size); |