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| author | Jarek Poplawski <jarkao2@gmail.com> | 2010-08-11 02:02:10 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-26 16:43:47 -0700 |
| commit | 7abab52d26329d2e0fe97a12560e6ba44ebe4eff (patch) | |
| tree | 4b037c64bc4ef8922a7277ca8f495e775e27e3b0 | |
| parent | 700aaacee609d03b9c790206468340661e8a908d (diff) | |
net: Fix a memmove bug in dev_gro_receive()
[ Upstream commit e5093aec2e6b60c3df2420057ffab9ed4a6d2792 ]
>Xin Xiaohui wrote:
> I looked into the code dev_gro_receive(), found the code here:
> if the frags[0] is pulled to 0, then the page will be released,
> and memmove() frags left.
> Is that right? I'm not sure if memmove do right or not, but
> frags[0].size is never set after memove at least. what I think
> a simple way is not to do anything if we found frags[0].size == 0.
> The patch is as followed.
...
This version of the patch fixes the bug directly in memmove.
Reported-by: "Xin, Xiaohui" <xiaohui.xin@intel.com>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | net/core/dev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 3427c599549..740e71ff7c3 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2735,7 +2735,7 @@ pull: put_page(skb_shinfo(skb)->frags[0].page); memmove(skb_shinfo(skb)->frags, skb_shinfo(skb)->frags + 1, - --skb_shinfo(skb)->nr_frags); + --skb_shinfo(skb)->nr_frags * sizeof(skb_frag_t)); } } |