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author | Herbert Xu <herbert@gondor.apana.org.au> | 2007-09-06 13:06:35 (GMT) |
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committer | David S. Miller <davem@kimchee.(none)> | 2007-09-11 08:29:07 (GMT) |
commit | ef8aef55ce61fd0e2af798695f7386ac756ae1e7 (patch) | |
tree | dd3d30a25e69fa94dcffa024e5a87758c0f6ba24 /net | |
parent | 2fbe43f6f631dd7ce19fb1499d6164a5bdb34568 (diff) | |
download | linux-fsl-qoriq-ef8aef55ce61fd0e2af798695f7386ac756ae1e7.tar.xz |
[NET]: Do not dereference iov if length is zero
When msg_iovlen is zero we shouldn't try to dereference
msg_iov. Right now the only thing that tries to do so
is skb_copy_and_csum_datagram_iovec. Since the total
length should also be zero if msg_iovlen is zero, it's
sufficient to check the total length there and simply
return if it's zero.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r-- | net/core/datagram.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/core/datagram.c b/net/core/datagram.c index cb056f4..029b93e 100644 --- a/net/core/datagram.c +++ b/net/core/datagram.c @@ -450,6 +450,9 @@ int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb, __wsum csum; int chunk = skb->len - hlen; + if (!chunk) + return 0; + /* Skip filled elements. * Pretty silly, look at memcpy_toiovec, though 8) */ |