Re: [PATCH stable <= 3.18] net: add length argument to skb_copy_and_csum_datagram_iovec
From: Sabrina Dubroca <sd@queasysnail.net>
Date: 2015-10-29 10:00:24
Also in:
stable
2015-10-15, 14:25:03 +0200, Sabrina Dubroca wrote:
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 <redacted>Fixes CVE-2015-8019. http://www.openwall.com/lists/oss-security/2015/10/29/1 -- Sabrina