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Date: Thu, 15 Jul 2010 22:45:57 +0400 From: Kulikov Vasiliy <segooon@...il.com> To: kernel-janitors@...r.kernel.org Cc: "David S. Miller" <davem@...emloft.net>, Jeff Kirsher <jeffrey.t.kirsher@...el.com>, Greg Rose <gregory.v.rose@...el.com>, Eric Dumazet <eric.dumazet@...il.com>, Joe Perches <joe@...ches.com>, netdev@...r.kernel.org Subject: [PATCH 5/8] 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@...il.com> --- drivers/net/ixgbevf/ixgbevf_main.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) 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 @@ static int ixgbevf_tx_map(struct ixgbevf_adapter *adapter, 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; -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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