From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Lu Baolu , Ashok Raj , Jacob Pan , Sohil Mehta , Joerg Roedel , Sasha Levin , iommu@lists.linux-foundation.org Subject: [PATCH AUTOSEL 4.19 05/68] iommu/vt-d: Fix NULL pointer dereference in prq_event_thread() Date: Thu, 29 Nov 2018 00:54:56 -0500 Message-Id: <20181129055559.159228-5-sashal@kernel.org> In-Reply-To: <20181129055559.159228-1-sashal@kernel.org> References: <20181129055559.159228-1-sashal@kernel.org> List-ID: From: Lu Baolu [ 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 Cc: Jacob Pan Cc: Sohil Mehta Signed-off-by: Lu Baolu Fixes: a222a7f0bb6c9 'iommu/vt-d: Implement page request handling' Signed-off-by: Joerg Roedel Signed-off-by: Sasha Levin --- drivers/iommu/intel-svm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index 4a03e5090952..188f4eaed6e5 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -596,7 +596,7 @@ 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) { -- 2.17.1