Patch "virtio: fix memory leak of virtio ida cache layers" has been added to the 3.14-stable tree

Patch "virtio: fix memory leak of virtio ida cache layers" has been added to the 3.14-stable tree

[gregkh]

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

    virtio: fix memory leak of virtio ida cache layers

to the 3.14-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:
     virtio-fix-memory-leak-of-virtio-ida-cache-layers.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From c13f99b7e945dad5273a8b7ee230f4d1f22d3354 Mon Sep 17 00:00:00 2001
From: Suman Anna <s-anna@ti.com>
Date: Wed, 16 Sep 2015 19:29:17 -0500
Subject: virtio: fix memory leak of virtio ida cache layers

From: Suman Anna <s-anna@ti.com>

commit c13f99b7e945dad5273a8b7ee230f4d1f22d3354 upstream.

The virtio core uses a static ida named virtio_index_ida for
assigning index numbers to virtio devices during registration.
The ida core may allocate some internal idr cache layers and
an ida bitmap upon any ida allocation, and all these layers are
truely freed only upon the ida destruction. The virtio_index_ida
is not destroyed at present, leading to a memory leak when using
the virtio core as a module and atleast one virtio device is
registered and unregistered.

Fix this by invoking ida_destroy() in the virtio core module
exit.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/virtio/virtio.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -249,6 +249,7 @@ static int virtio_init(void)
 static void __exit virtio_exit(void)
 {
 	bus_unregister(&virtio_bus);
+	ida_destroy(&virtio_index_ida);
 }
 core_initcall(virtio_init);
 module_exit(virtio_exit);


Patches currently in stable-queue which might be from s-anna@ti.com are

queue-3.14/virtio-fix-memory-leak-of-virtio-ida-cache-layers.patch