drivers: ixgbevf: fix unsigned underflow
'count' is unsigned. It is initialized to zero, then it can be increased
multiple times, and finally it is used in such a way:
>>>> count--;
|
| /* clear timestamp and dma mappings for remaining portion of packet */
| while (count >= 0) {
| count--;
| ...
^
If count is zero here (so, it was never increased), we would have a very
long loop :)
Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ixgbevf/ixgbevf_main.c b/drivers/net/ixgbevf/ixgbevf_main.c
index 73f1e75..af49135 100644
--- a/drivers/net/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ixgbevf/ixgbevf_main.c
@@ -2935,7 +2935,8 @@
struct ixgbevf_tx_buffer *tx_buffer_info;
unsigned int len;
unsigned int total = skb->len;
- unsigned int offset = 0, size, count = 0;
+ unsigned int offset = 0, size;
+ int count = 0;
unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
unsigned int f;
int i;