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iommu/vt-d: Fix NULL pointer dereference in prq_event_thread() 

When handling page request without pasid event, go to "no_pasid"
branch instead of "bad_req". Otherwise, a NULL pointer deference
will happen there.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Sohil Mehta <sohil.mehta@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Fixes: a222a7f0bb 'iommu/vt-d: Implement page request handling'
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2018-11-05 10:18:58 +08:00 committed by Joerg Roedel
parent 651022382c
commit 19ed3e2dd8
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/intel-svm.c
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@ -595,7 +595,7 @@ static irqreturn_t prq_event_thread(int irq, void *d)
pr_err("%s: Page request without PASID: %08llx %08llx\n", pr_err("%s: Page request without PASID: %08llx %08llx\n",
iommu->name, ((unsigned long long *)req)[0], iommu->name, ((unsigned long long *)req)[0],
((unsigned long long *)req)[1]); ((unsigned long long *)req)[1]);
goto bad_req; goto no_pasid;
} }
if (!svm || svm->pasid != req->pasid) { if (!svm || svm->pasid != req->pasid) {