diff options
| -rw-r--r-- | drivers/pci/switch/switchtec.c | 6 | ||||
| -rw-r--r-- | include/linux/switchtec.h | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c index af85d232d200..92b95e8067c0 100644 --- a/drivers/pci/switch/switchtec.c +++ b/drivers/pci/switch/switchtec.c @@ -479,6 +479,12 @@ static ssize_t switchtec_dev_write(struct file *filp, const char __user *data, rc = -EFAULT; goto out; } + if (((MRPC_CMD_ID(stuser->cmd) == MRPC_GAS_WRITE) || + (MRPC_CMD_ID(stuser->cmd) == MRPC_GAS_READ)) && + !capable(CAP_SYS_ADMIN)) { + rc = -EPERM; + goto out; + } data += sizeof(stuser->cmd); rc = copy_from_user(&stuser->data, data, size - sizeof(stuser->cmd)); diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h index e85155244135..082f1d51957a 100644 --- a/include/linux/switchtec.h +++ b/include/linux/switchtec.h @@ -21,6 +21,11 @@ #define SWITCHTEC_EVENT_FATAL BIT(4) #define SWITCHTEC_DMA_MRPC_EN BIT(0) + +#define MRPC_GAS_READ 0x29 +#define MRPC_GAS_WRITE 0x87 +#define MRPC_CMD_ID(x) ((x) & 0xffff) + enum { SWITCHTEC_GAS_MRPC_OFFSET = 0x0000, SWITCHTEC_GAS_TOP_CFG_OFFSET = 0x1000, |