tree d34924a7da4c11c4d06deca3f3371725ffb0ae7a
parent 4b480741060d3eca87c8aea058ede6a26213e5a7
author Mohamed Ghannam <simo.ghannam@gmail.com> 1512877858 +0000
committer Todd Kjos <tkjos@google.com> 1522778217 -0700

net: ipv4: fix for a race condition in raw_sendmsg

[ Upstream commit 8f659a03a0ba9289b9aeb9b4470e6fb263d6f483 ]

inet->hdrincl is racy, and could lead to uninitialized stack pointer
usage, so its value should be read only once.

Change-Id: Ic3e4e1d3f6762e83db06c2bf52dd0923286ce2cc
Fixes: c008ba5bdc9f ("ipv4: Avoid reading user iov twice after raw_probe_proto_opt")
Signed-off-by: Mohamed Ghannam <simo.ghannam@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>