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%3Ba=su...

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