Patch "IB/core: Fix missing RDMA cgroups release in case of failure to register device" has been added to the 4.15-stable tree

[<gregkh@linuxfoundation.org>]

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

    IB/core: Fix missing RDMA cgroups release in case of failure to register device

to the 4.15-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:
     ib-core-fix-missing-rdma-cgroups-release-in-case-of-failure-to-register-device.patch
and it can be found in the queue-4.15 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 2fb4f4eadd180a50112618dd9c5fef7fc50d4f08 Mon Sep 17 00:00:00 2001
From: Parav Pandit <parav@mellanox.com>
Date: Sun, 25 Feb 2018 13:39:56 +0200
Subject: IB/core: Fix missing RDMA cgroups release in case of failure to register device

From: Parav Pandit <parav@mellanox.com>

commit 2fb4f4eadd180a50112618dd9c5fef7fc50d4f08 upstream.

During IB device registration process, if query_device() fails or if
ib_core fails to registers sysfs entries, rdma cgroup cleanup is
skipped.

Cc: <stable@vger.kernel.org> # v4.2+
Fixes: 4be3a4fa51f4 ("IB/core: Fix kernel crash during fail to initialize device")
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/core/device.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -534,14 +534,14 @@ int ib_register_device(struct ib_device
 	ret = device->query_device(device, &device->attrs, &uhw);
 	if (ret) {
 		pr_warn("Couldn't query the device attributes\n");
-		goto cache_cleanup;
+		goto cg_cleanup;
 	}
 
 	ret = ib_device_register_sysfs(device, port_callback);
 	if (ret) {
 		pr_warn("Couldn't register device %s with driver model\n",
 			device->name);
-		goto cache_cleanup;
+		goto cg_cleanup;
 	}
 
 	device->reg_state = IB_DEV_REGISTERED;
@@ -557,6 +557,8 @@ int ib_register_device(struct ib_device
 	mutex_unlock(&device_mutex);
 	return 0;
 
+cg_cleanup:
+	ib_device_unregister_rdmacg(device);
 cache_cleanup:
 	ib_cache_cleanup_one(device);
 	ib_cache_release_one(device);


Patches currently in stable-queue which might be from parav@mellanox.com are

queue-4.15/ib-core-fix-missing-rdma-cgroups-release-in-case-of-failure-to-register-device.patch