habanalabs: prevent user buff overflow

This commit fixes a potential debugfs issue that may occur when
reading the clock gating mask into the user buffer since the
user buffer size was not taken into consideration.

Signed-off-by: Moti Haimovski <mhaimovski@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

diff --git a/drivers/misc/habanalabs/common/debugfs.c b/drivers/misc/habanalabs/common/debugfs.c
index 37701e4f9d5afffb32417fee3824d92dcca82dcb..aa77771635d33fca449c13e8bc7cde97315a3130 100644 (file)
--- a/drivers/misc/habanalabs/common/debugfs.c
+++ b/drivers/misc/habanalabs/common/debugfs.c
@@ -982,7 +982,7 @@ static ssize_t hl_clk_gate_read(struct file *f, char __user *buf,
                return 0;
 
        sprintf(tmp_buf, "0x%llx\n", hdev->clock_gating_mask);
-       rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf,
+       rc = simple_read_from_buffer(buf, count, ppos, tmp_buf,
                        strlen(tmp_buf) + 1);
 
        return rc;