[PATCH] i40e: fix integer overflow in i40e_dbg_command_write()

[rivaldihormat-debug]

Signed-off-by: rivaldihormat-debug <rivaldihor...@gmail.com>
---
 drivers/net/ethernet/intel/i40e/i40e_debugfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c 
b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
index 0b52509cb14c..ca77636bf3de 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -722,6 +722,8 @@ static ssize_t i40e_dbg_command_write(struct file *filp,
        int cnt;
 
        /* don't allow partial writes */
+       if (count == 0 || count > PAGE_SIZE)
+               return -EINVAL;
        if (*ppos != 0)
                return 0;
 
-- 
2.53.0