Patch "drivers: hv: Turn off write permission on the hypercall page" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

drivers: hv: Turn off write permission on the hypercall page

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drivers-hv-turn-off-write-permission-on-the-hypercall-page.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: "K. Y. Srinivasan" <[email protected]>
Date: Wed, 8 Feb 2017 18:30:56 -0700
Subject: drivers: hv: Turn off write permission on the hypercall page

From: K. Y. Srinivasan <[email protected]>

commit 372b1e91343e657a7cc5e2e2bcecd5140ac28119 upstream.

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

---
 drivers/hv/hv.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -219,7 +219,7 @@ int hv_init(void)
 	/* See if the hypercall page is already set */
 	rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
 
-	virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC);
+	virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_RX);
 
 	if (!virtaddr)
 		goto cleanup;

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/drivers-hv-turn-off-write-permission-on-the-hypercall-page.patch