tree e0493b3d64f73d8b96ecdf8b2a2607d9519850ad
parent 2c230830b9869ca6d497baed3aad5bd7c2536b4e
author Herbert Xu <herbert@gondor.apana.org.au> 1190317296 -0700
committer Willy Tarreau <w@1wt.eu> 1192649439 +0200

[PATCH] Fix datagram recvmsg NULL iov handling regression.

commit ef8aef55ce61fd0e2af798695f7386ac756ae1e7 in mainline

Subject: [PATCH] [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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>