Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ef8aef55ce61fd0e2af798695f7386ac756ae1e7
Commit: ef8aef55ce61fd0e2af798695f7386ac756ae1e7
Parent: 2fbe43f6f631dd7ce19fb1499d6164a5bdb34568
Author: Herbert Xu <[EMAIL PROTECTED]>
AuthorDate: Thu Sep 6 14:06:35 2007 +0100
Committer: David S. Miller <[EMAIL PROTECTED](none)>
CommitDate: Tue Sep 11 10:29:07 2007 +0200
[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 <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
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)
*/
-
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