tree 015741e7f0bc7bfa815498867db421ea169dcb0c
parent 76b338069f0dbf33ac7a66f167a804b9dcc96b58
author Willy Tarreau <w@1wt.eu> 1536730595 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1538215652 -0700

net/appletalk: fix minor pointer leak to userspace in SIOCFINDIPDDPRT

[ Upstream commit 9824dfae5741275473a23a7ed5756c7b6efacc9d ]

Fields ->dev and ->next of struct ipddp_route may be copied to
userspace on the SIOCFINDIPDDPRT ioctl. This is only accessible
to CAP_NET_ADMIN though. Let's manually copy the relevant fields
instead of using memcpy().

BugLink: http://blog.infosectcbr.com.au/2018/09/linux-kernel-infoleaks.html
Cc: Jann Horn <jannh@google.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>