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Commit df11500b authored by Lu Baolu's avatar Lu Baolu Committed by Greg Kroah-Hartman
Browse files

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



[ Upstream commit 19ed3e2dd8549c1a34914e8dad01b64e7837645a ]

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: default avatarLu Baolu <baolu.lu@linux.intel.com>
Fixes: a222a7f0 'iommu/vt-d: Implement page request handling'
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent bcdfccfd

drivers/iommu/intel-svm.c

+1 −1
Original line number Diff line number Diff line
@@ -589,7 +589,7 @@ static irqreturn_t prq_event_thread(int irq, void *d) 
			pr_err("%s: Page request without PASID: %08llx %08llx\n",

			       iommu->name, ((unsigned long long *)req)[0],

			       ((unsigned long long *)req)[1]);

			goto bad_req;

			goto no_pasid;

		}



		if (!svm || svm->pasid != req->pasid) {