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iommu: Fix a check in iommu_check_bind_data()

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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: d90573812e ("iommu/uapi: Handle data and argsz filled by users")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20201103101623.GA1127762@mwanda
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Dan Carpenter 2020-11-03 13:16:23 +03:00 committed by Joerg Roedel
parent 71cd8e2d16
commit 4dd6ce4780
1 changed files with 1 additions and 1 deletions
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drivers/iommu/iommu.c
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@ -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)