* [PATCH] PCI: iproc: Fix NULL pointer dereference for BCMA
@ 2018-01-09 19:45 Ray Jui
2018-01-11 17:15 ` Lorenzo Pieralisi
0 siblings, 1 reply; 3+ messages in thread
From: Ray Jui @ 2018-01-09 19:45 UTC (permalink / raw)
To: Bjorn Helgaas, Bjorn Helgaas
Cc: linux-kernel, bcm-kernel-feedback-list, linux-pci, Rafal Milecki,
Ray Jui, stable
With the inbound DMA mapping supported added, the iProc PCIe driver
parses DT property "dma-ranges" through call to
"of_pci_dma_range_parser_init". In the case of BCMA, this results in a
NULL pointer deference due to a missing of_node.
Fix this by adding a guard in pcie-iproc-platform.c to only enable the
inbound DMA mapping logic when DT property "dma-ranges" is present
fixes: dd9d4e7498de3 ("PCI: iproc: Add inbound DMA mapping support")
Reported-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Tested-by: Rafał Miłecki <rafal@milecki.pl>
Cc: <stable@vger.kernel.org> # 4.10+
---
drivers/pci/host/pcie-iproc-platform.c | 3 +++
drivers/pci/host/pcie-iproc.c | 8 +++++---
drivers/pci/host/pcie-iproc.h | 2 ++
3 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c
index a5073a9..235c545 100644
--- a/drivers/pci/host/pcie-iproc-platform.c
+++ b/drivers/pci/host/pcie-iproc-platform.c
@@ -92,6 +92,9 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
pcie->need_ob_cfg = true;
}
+ if (of_property_read_bool(np, "dma-ranges"))
+ pcie->need_ib_cfg = true;
+
/* PHY use is optional */
pcie->phy = devm_phy_get(dev, "pcie-phy");
if (IS_ERR(pcie->phy)) {
diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c
index 935909b..7583606 100644
--- a/drivers/pci/host/pcie-iproc.c
+++ b/drivers/pci/host/pcie-iproc.c
@@ -1378,9 +1378,11 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
}
}
- ret = iproc_pcie_map_dma_ranges(pcie);
- if (ret && ret != -ENOENT)
- goto err_power_off_phy;
+ if (pcie->need_ib_cfg) {
+ ret = iproc_pcie_map_dma_ranges(pcie);
+ if (ret && ret != -ENOENT)
+ goto err_power_off_phy;
+ }
#ifdef CONFIG_ARM
pcie->sysdata.private_data = pcie;
diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h
index a6b55ce..4ac6282 100644
--- a/drivers/pci/host/pcie-iproc.h
+++ b/drivers/pci/host/pcie-iproc.h
@@ -74,6 +74,7 @@ struct iproc_msi;
* @ob: outbound mapping related parameters
* @ob_map: outbound mapping related parameters specific to the controller
*
+ * @need_ib_cfg: indicates SW needs to configure the inbound mapping window
* @ib: inbound mapping related parameters
* @ib_map: outbound mapping region related parameters
*
@@ -101,6 +102,7 @@ struct iproc_pcie {
struct iproc_pcie_ob ob;
const struct iproc_pcie_ob_map *ob_map;
+ bool need_ib_cfg;
struct iproc_pcie_ib ib;
const struct iproc_pcie_ib_map *ib_map;
--
2.1.4
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] PCI: iproc: Fix NULL pointer dereference for BCMA
2018-01-09 19:45 [PATCH] PCI: iproc: Fix NULL pointer dereference for BCMA Ray Jui
@ 2018-01-11 17:15 ` Lorenzo Pieralisi
2018-01-11 20:37 ` Ray Jui
0 siblings, 1 reply; 3+ messages in thread
From: Lorenzo Pieralisi @ 2018-01-11 17:15 UTC (permalink / raw)
To: Ray Jui
Cc: Bjorn Helgaas, Bjorn Helgaas, linux-kernel,
bcm-kernel-feedback-list, linux-pci, Rafal Milecki, stable
On Tue, Jan 09, 2018 at 11:45:40AM -0800, Ray Jui wrote:
> With the inbound DMA mapping supported added, the iProc PCIe driver
> parses DT property "dma-ranges" through call to
> "of_pci_dma_range_parser_init". In the case of BCMA, this results in a
> NULL pointer deference due to a missing of_node.
>
> Fix this by adding a guard in pcie-iproc-platform.c to only enable the
> inbound DMA mapping logic when DT property "dma-ranges" is present
>
> fixes: dd9d4e7498de3 ("PCI: iproc: Add inbound DMA mapping support")
s/fixes/Fixes
> Reported-by: Rafał Miłecki <rafal@milecki.pl>
> Signed-off-by: Ray Jui <ray.jui@broadcom.com>
> Tested-by: Rafał Miłecki <rafal@milecki.pl>
> Cc: <stable@vger.kernel.org> # 4.10+
> ---
> drivers/pci/host/pcie-iproc-platform.c | 3 +++
> drivers/pci/host/pcie-iproc.c | 8 +++++---
> drivers/pci/host/pcie-iproc.h | 2 ++
> 3 files changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c
> index a5073a9..235c545 100644
> --- a/drivers/pci/host/pcie-iproc-platform.c
> +++ b/drivers/pci/host/pcie-iproc-platform.c
> @@ -92,6 +92,9 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
> pcie->need_ob_cfg = true;
> }
>
> + if (of_property_read_bool(np, "dma-ranges"))
> + pcie->need_ib_cfg = true;
Nit:
pci->need_ib_cfg = of_property_read_bool(np, "dma-ranges"));
will do. Add a comment to it to explain why it is needed.
Please update the patch, send a v2 and I will merge it.
Thanks,
Lorenzo
> +
> /* PHY use is optional */
> pcie->phy = devm_phy_get(dev, "pcie-phy");
> if (IS_ERR(pcie->phy)) {
> diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c
> index 935909b..7583606 100644
> --- a/drivers/pci/host/pcie-iproc.c
> +++ b/drivers/pci/host/pcie-iproc.c
> @@ -1378,9 +1378,11 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
> }
> }
>
> - ret = iproc_pcie_map_dma_ranges(pcie);
> - if (ret && ret != -ENOENT)
> - goto err_power_off_phy;
> + if (pcie->need_ib_cfg) {
> + ret = iproc_pcie_map_dma_ranges(pcie);
> + if (ret && ret != -ENOENT)
> + goto err_power_off_phy;
> + }
>
> #ifdef CONFIG_ARM
> pcie->sysdata.private_data = pcie;
> diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h
> index a6b55ce..4ac6282 100644
> --- a/drivers/pci/host/pcie-iproc.h
> +++ b/drivers/pci/host/pcie-iproc.h
> @@ -74,6 +74,7 @@ struct iproc_msi;
> * @ob: outbound mapping related parameters
> * @ob_map: outbound mapping related parameters specific to the controller
> *
> + * @need_ib_cfg: indicates SW needs to configure the inbound mapping window
> * @ib: inbound mapping related parameters
> * @ib_map: outbound mapping region related parameters
> *
> @@ -101,6 +102,7 @@ struct iproc_pcie {
> struct iproc_pcie_ob ob;
> const struct iproc_pcie_ob_map *ob_map;
>
> + bool need_ib_cfg;
> struct iproc_pcie_ib ib;
> const struct iproc_pcie_ib_map *ib_map;
>
> --
> 2.1.4
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] PCI: iproc: Fix NULL pointer dereference for BCMA
2018-01-11 17:15 ` Lorenzo Pieralisi
@ 2018-01-11 20:37 ` Ray Jui
0 siblings, 0 replies; 3+ messages in thread
From: Ray Jui @ 2018-01-11 20:37 UTC (permalink / raw)
To: Lorenzo Pieralisi
Cc: Bjorn Helgaas, Bjorn Helgaas, linux-kernel,
bcm-kernel-feedback-list, linux-pci, Rafal Milecki, stable
Hi Lorenzo,
On 1/11/2018 9:15 AM, Lorenzo Pieralisi wrote:
> On Tue, Jan 09, 2018 at 11:45:40AM -0800, Ray Jui wrote:
>> With the inbound DMA mapping supported added, the iProc PCIe driver
>> parses DT property "dma-ranges" through call to
>> "of_pci_dma_range_parser_init". In the case of BCMA, this results in a
>> NULL pointer deference due to a missing of_node.
>>
>> Fix this by adding a guard in pcie-iproc-platform.c to only enable the
>> inbound DMA mapping logic when DT property "dma-ranges" is present
>>
>> fixes: dd9d4e7498de3 ("PCI: iproc: Add inbound DMA mapping support")
>
> s/fixes/Fixes >
Will fix.
>> Reported-by: Rafał Miłecki <rafal@milecki.pl>
>> Signed-off-by: Ray Jui <ray.jui@broadcom.com>
>> Tested-by: Rafał Miłecki <rafal@milecki.pl>
>> Cc: <stable@vger.kernel.org> # 4.10+
>> ---
>> drivers/pci/host/pcie-iproc-platform.c | 3 +++
>> drivers/pci/host/pcie-iproc.c | 8 +++++---
>> drivers/pci/host/pcie-iproc.h | 2 ++
>> 3 files changed, 10 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c
>> index a5073a9..235c545 100644
>> --- a/drivers/pci/host/pcie-iproc-platform.c
>> +++ b/drivers/pci/host/pcie-iproc-platform.c
>> @@ -92,6 +92,9 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
>> pcie->need_ob_cfg = true;
>> }
>>
>> + if (of_property_read_bool(np, "dma-ranges"))
>> + pcie->need_ib_cfg = true;
>
> Nit:
> pci->need_ib_cfg = of_property_read_bool(np, "dma-ranges"));
>
> will do. Add a comment to it to explain why it is needed.
Will fix.
>
> Please update the patch, send a v2 and I will merge it.
Okay will send out v2 with comments from you addressed. Thanks!
>
> Thanks,
> Lorenzo
>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2018-01-11 20:37 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-01-09 19:45 [PATCH] PCI: iproc: Fix NULL pointer dereference for BCMA Ray Jui
2018-01-11 17:15 ` Lorenzo Pieralisi
2018-01-11 20:37 ` Ray Jui
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).