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| author | Sabrina Dubroca <sd@queasysnail.net> | 2015-10-15 14:25:03 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-11-17 15:54:45 +0000 |
| commit | 127500d724f8c43f452610c9080444eedb5eaa6c (patch) | |
| tree | c2667b2ad3456bc39a3b1b3c3e61951a203521f0 /include/linux | |
| parent | 4421196453ad90ff54c97b5d600d65464a3965b2 (diff) | |
| download | lwn-127500d724f8c43f452610c9080444eedb5eaa6c.tar.gz lwn-127500d724f8c43f452610c9080444eedb5eaa6c.zip | |
net: add length argument to skb_copy_and_csum_datagram_iovec
Without this length argument, we can read past the end of the iovec in
memcpy_toiovec because we have no way of knowing the total length of the
iovec's buffers.
This is needed for stable kernels where 89c22d8c3b27 ("net: Fix skb
csum races when peeking") has been backported but that don't have the
ioviter conversion, which is almost all the stable trees <= 3.18.
This also fixes a kernel crash for NFS servers when the client uses
-onfsvers=3,proto=udp to mount the export.
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
[bwh: Backported to 3.2: adjust context in include/linux/skbuff.h]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/skbuff.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 1b4ea29d3943..d38c2eebf1be 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2131,7 +2131,8 @@ extern int skb_copy_datagram_iovec(const struct sk_buff *from, int size); extern int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb, int hlen, - struct iovec *iov); + struct iovec *iov, + int len); extern int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset, const struct iovec *from, |