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iommu/vt-d: shift wrapping bug in prq_event_thread()

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The "req->addr" variable is a bit field declared as "u64 addr:52;".
The "address" variable is a u64.  We need to cast "req->addr" to a u64
before the shift or the result is truncated to 52 bits.

Fixes: a222a7f0bb6c ('iommu/vt-d: Implement page request handling')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Dan Carpenter 2015-10-15 21:25:15 +03:00 committed by David Woodhouse
parent 26322ab55a
commit 95fb6144bb
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/intel-svm.c
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@ -490,7 +490,7 @@ static irqreturn_t prq_event_thread(int irq, void *d)
req = &iommu->prq[head / sizeof(*req)];
result = QI_RESP_FAILURE;
address = req->addr << PAGE_SHIFT;
address = (u64)req->addr << PAGE_SHIFT;
if (!req->pasid_present) {
pr_err("%s: Page request without PASID: %08llx %08llx\n",
iommu->name, ((unsigned long long *)req)[0],