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kernel: properly pad the allocated headroom in skb_cow to NET_SKB_PAD

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31906 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2012-05-27 15:16:37 +00:00
parent fe77f5d922
commit 95d801c59d
1 changed files with 2 additions and 1 deletions
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3
target/linux/generic/patches-3.3/654-avoid_skb_cow_realloc.patch
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@ -10,10 +10,11 @@
if (headroom < NET_SKB_PAD)
- headroom = NET_SKB_PAD;
- if (headroom > skb_headroom(skb))
- delta = headroom - skb_headroom(skb);
+ alloc_headroom = NET_SKB_PAD;
+ if (headroom > skb_headroom(skb) ||
+ (cloned && alloc_headroom > skb_headroom(skb))) {
delta = headroom - skb_headroom(skb);
+ delta = alloc_headroom - skb_headroom(skb);
+ }
if (delta || cloned)