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Add missing UFO initialisations

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This bug was unknowingly fixed the GSO patches (or rather, its effect was
unknown at the time).

Thanks to Marco Berizzi's persistence which is documented in the thread
"ipsec tunnel asymmetrical mtu", we now know that it can have highly
non-obvious symptoms.

What happens is that uninitialised uso_size fields can cause packets to
be incorrectly identified as UFO, which means that it does not get
fragmented even if it's over the MTU.

The fix is simple enough.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Herbert Xu
2006-07-13 19:11:01 +10:00
committed by Greg Kroah-Hartman
parent 949837a9ea
commit cefc30b36a
2 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/core/dev.c
+1
View File
@@ -1246,6 +1246,7 @@ int __skb_linearize(struct sk_buff *skb, gfp_t gfp_mask)
atomic_set(&ninfo->dataref, 1);
ninfo->tso_size = skb_shinfo(skb)->tso_size;
ninfo->tso_segs = skb_shinfo(skb)->tso_segs;
ninfo->ufo_size = skb_shinfo(skb)->ufo_size;
ninfo->nr_frags = 0;
ninfo->frag_list = NULL;
net/core/skbuff.c
+2
View File
@@ -240,6 +240,7 @@ struct sk_buff *alloc_skb_from_cache(kmem_cache_t *cp,
skb_shinfo(skb)->nr_frags = 0;
skb_shinfo(skb)->tso_size = 0;
skb_shinfo(skb)->tso_segs = 0;
skb_shinfo(skb)->ufo_size = 0;
skb_shinfo(skb)->frag_list = NULL;
out:
return skb;
@@ -529,6 +530,7 @@ static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
atomic_set(&new->users, 1);
skb_shinfo(new)->tso_size = skb_shinfo(old)->tso_size;
skb_shinfo(new)->tso_segs = skb_shinfo(old)->tso_segs;
skb_shinfo(new)->ufo_size = skb_shinfo(old)->ufo_size;
}
/**