* [PATCH] iommu: fix a check in iommu_check_bind_data()
@ 2020-11-03 10:16 Dan Carpenter
2020-11-03 13:56 ` Joerg Roedel
0 siblings, 1 reply; 2+ messages in thread
From: Dan Carpenter @ 2020-11-03 10:16 UTC (permalink / raw)
To: Joerg Roedel, Jacob Pan; +Cc: Jean-Philippe Brucker, iommu, kernel-janitors
The "data->flags" variable is a u64 so if one of the high 32 bits is
set the original code will allow it, but it should be rejected. The
fix is to declare "mask" as a u64 instead of a u32.
Fixes: d90573812eea ("iommu/uapi: Handle data and argsz filled by users")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/iommu/iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 8c470f451a32..b53446bb8c6b 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2071,7 +2071,7 @@ EXPORT_SYMBOL_GPL(iommu_uapi_cache_invalidate);
static int iommu_check_bind_data(struct iommu_gpasid_bind_data *data)
{
- u32 mask;
+ u64 mask;
int i;
if (data->version != IOMMU_GPASID_BIND_VERSION_1)
--
2.28.0
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] iommu: fix a check in iommu_check_bind_data()
2020-11-03 10:16 [PATCH] iommu: fix a check in iommu_check_bind_data() Dan Carpenter
@ 2020-11-03 13:56 ` Joerg Roedel
0 siblings, 0 replies; 2+ messages in thread
From: Joerg Roedel @ 2020-11-03 13:56 UTC (permalink / raw)
To: Dan Carpenter; +Cc: Jean-Philippe Brucker, Jacob Pan, kernel-janitors, iommu
On Tue, Nov 03, 2020 at 01:16:23PM +0300, Dan Carpenter wrote:
> The "data->flags" variable is a u64 so if one of the high 32 bits is
> set the original code will allow it, but it should be rejected. The
> fix is to declare "mask" as a u64 instead of a u32.
>
> Fixes: d90573812eea ("iommu/uapi: Handle data and argsz filled by users")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
> drivers/iommu/iommu.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Applied for v5.10, thanks.
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