From: Barak Biber <bbiber@nvidia.com>
Date: Thu, 1 Aug 2024 09:26:04 -0300
Subject: iommu: Restore lost return in iommu_report_device_fault()
Git-commit: fca5b78511e98bdff2cdd55c172b23200a7b3404
Patch-mainline: v6.11-rc4
References: jsc#PED-10539 CVE-2024-44994 bsc#1230198

When iommu_report_device_fault gets called with a partial fault it is
supposed to collect the fault into the group and then return.

Instead the return was accidently deleted which results in trying to
process the fault and an eventual crash.

Deleting the return was a typo, put it back.

Fixes: 3dfa64aecbaf ("iommu: Make iommu_report_device_fault() return void")
Signed-off-by: Barak Biber <bbiber@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/0-v1-e7153d9c8cee+1c6-iommu_fault_fix_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/io-pgfault.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/io-pgfault.c b/drivers/iommu/io-pgfault.c
index cd679c13752e..81e9cc6e3164 100644
--- a/drivers/iommu/io-pgfault.c
+++ b/drivers/iommu/io-pgfault.c
@@ -170,6 +170,7 @@ void iommu_report_device_fault(struct device *dev, struct iopf_fault *evt)
 		report_partial_fault(iopf_param, fault);
 		iopf_put_dev_fault_param(iopf_param);
 		/* A request that is not the last does not need to be ack'd */
+		return;
 	}
 
 	/*

