Re: [PATCH net-next] net: Check frag_lists first to prevent data out of order

[Weilong Chen]

From: Weilong Chen <chenweil...@huawei.com>
Date: Fri, 28 Aug 2015 11:35:40 +0800

In my test, @to has a fraglist, but skb_tailroom(to) is not 0!
The test is about tipc, the function tipc_buf_append will merge 3 skbs
to one:
packet 1: len = 1420 skb_tailroom = 190
packet 2: len = 1420
        packet 2 will be add to 1' fraglist, but not update skb_tailroom

This operation is illegal.

Once there are frags, tailroom is not permitted.

.

Agree

Thanks

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