Patch "vfio/spapr_tce: Check kzalloc() return when preregistering memory" has been added to the 4.9-stable tree

Patch "vfio/spapr_tce: Check kzalloc() return when preregistering memory" has been added to the 4.9-stable tree

[gregkh]

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

    vfio/spapr_tce: Check kzalloc() return when preregistering memory

to the 4.9-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:
     vfio-spapr_tce-check-kzalloc-return-when-preregistering-memory.patch
and it can be found in the queue-4.9 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 foo@baz Sun Mar 18 16:55:33 CET 2018
From: Alexey Kardashevskiy <aik@ozlabs.ru>
Date: Mon, 27 Mar 2017 14:23:40 +1100
Subject: vfio/spapr_tce: Check kzalloc() return when preregistering memory

From: Alexey Kardashevskiy <aik@ozlabs.ru>


[ Upstream commit 3393af24b665cb0aea7353b05e522b03ab1e7d73 ]

This adds missing checking for kzalloc() return value.

Fixes: 4b6fad7097f8 ("powerpc/mm/iommu, vfio/spapr: Put pages on VFIO container shutdown")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/vfio/vfio_iommu_spapr_tce.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -195,6 +195,11 @@ static long tce_iommu_register_pages(str
 		return ret;
 
 	tcemem = kzalloc(sizeof(*tcemem), GFP_KERNEL);
+	if (!tcemem) {
+		mm_iommu_put(container->mm, mem);
+		return -ENOMEM;
+	}
+
 	tcemem->mem = mem;
 	list_add(&tcemem->next, &container->prereg_list);
 


Patches currently in stable-queue which might be from aik@ozlabs.ru are

queue-4.9/vfio-spapr_tce-check-kzalloc-return-when-preregistering-memory.patch
queue-4.9/vfio-powerpc-spapr_tce-enforce-iommu-type-compatibility-check.patch