From: Suman Anna Date: Thu, 17 Sep 2015 00:29:17 +0000 (-0500) Subject: virtio: fix memory leak of virtio ida cache layers X-Git-Tag: v3.10.99~46 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=963e16256e30f627f5c105814a8d9658f2107b7e;p=thirdparty%2Fkernel%2Fstable.git virtio: fix memory leak of virtio ida cache layers 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 Signed-off-by: Michael S. Tsirkin Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index ee59b74768d95..beaa7cc4e857e 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -238,6 +238,7 @@ 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);