On Mon, Jan 08, 2018 at 02:56:36PM +0000, Jean-Philippe Brucker wrote:
> Hi,
>
> On Sun, Jan 07, 2018 at 08:35:02AM +0000, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
> > The patch below does not apply to the 4.4-stable tree.
> > If someone wants it applied there, or to any other stable or longterm
> > tree, then please email the backport, including the original git commit
> > id to <stable@xxxxxxxxxxxxxxx>.
>
> Please consider applying the updated backport for 4.4-stable, below.
>
> Thanks,
> Jean
>
> --- 8< ---
> >From 36a792dfdaff7fafeb7b870cc0f86a339df9ea25 Mon Sep 17 00:00:00 2001
> From: Jean-Philippe Brucker <jean-philippe.brucker@xxxxxxx>
> Date: Thu, 14 Dec 2017 11:03:01 +0000
> Subject: [PATCH] iommu/arm-smmu-v3: Don't free page table ops twice
>
> commit 57d72e159b60456c8bb281736c02ddd3164037aa upstream.
>
> Kasan reports a double free when finalise_stage_fn fails: the io_pgtable
> ops are freed by arm_smmu_domain_finalise and then again by
> arm_smmu_domain_free. Prevent this by leaving pgtbl_ops empty on failure.
>
> Fixes: 48ec83bcbcf5 ("iommu/arm-smmu: Add initial driver support for ARM SMMUv3 devices")
> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@xxxxxxx>
> ---
> drivers/iommu/arm-smmu-v3.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
This does not apply to the 4.4-stable tree:
checking file drivers/iommu/arm-smmu-v3.c
Hunk #1 FAILED at 1541.
1 out of 1 hunk FAILED
Are you sure you tried it?
thanks,
greg k-h