drivers: hv: Turn off write permission on the hypercall page
authorK. Y. Srinivasan <kys@microsoft.com>
Thu, 9 Feb 2017 01:30:56 +0000 (18:30 -0700)
committerBen Hutchings <ben@decadent.org.uk>
Mon, 5 Jun 2017 20:13:48 +0000 (21:13 +0100)
commit 372b1e91343e657a7cc5e2e2bcecd5140ac28119 upstream.

The hypercall page only needs to be executable but currently it is setup to
be writable as well. Fix the issue.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Acked-by: Kees Cook <keescook@chromium.org>
Reported-by: Stephen Hemminger <stephen@networkplumber.org>
Tested-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: adjust filename, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
drivers/hv/hv.c

diff --cc drivers/hv/hv.c
Simple merge