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authorJarek Poplawski <jarkao2@gmail.com>2010-08-11 02:02:10 +0000
committerDavid S. Miller <davem@davemloft.net>2010-08-17 17:37:28 -0700
commite5093aec2e6b60c3df2420057ffab9ed4a6d2792 (patch)
treef48c2c26c632adc44e5664bdea213b2f173f39f6 /net
parent1c40be12f7d8ca1d387510d39787b12e512a7ce8 (diff)
net: Fix a memmove bug in dev_gro_receive()
>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>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 1ae654391442..3721fbb9a83c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3143,7 +3143,7 @@ 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));
}
}