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Date: Fri, 18 Nov 2022 12:44:02 +0300 From: Denis Arefev <arefev@...mel.ru> To: Joerg Roedel <joro@...tes.org> Cc: Will Deacon <will@...nel.org>, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org, trufanov@...mel.ru, vfh@...mel.ru Subject: [PATCH] iommu: amd: Added value check Аdded a return value check for the function mmu_notifier_register. Return value of a function 'mmu_notifier_register' called at iommu_v2.c:642 is not checked, but it is usually checked for this function Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Denis Arefev <arefev@...mel.ru> --- drivers/iommu/amd/iommu_v2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/amd/iommu_v2.c b/drivers/iommu/amd/iommu_v2.c index 5ecc0bc608ec..88134f34589f 100644 --- a/drivers/iommu/amd/iommu_v2.c +++ b/drivers/iommu/amd/iommu_v2.c @@ -639,7 +639,9 @@ int amd_iommu_bind_pasid(struct pci_dev *pdev, u32 pasid, if (pasid_state->mm == NULL) goto out_free; - mmu_notifier_register(&pasid_state->mn, mm); + ret = mmu_notifier_register(&pasid_state->mn, mm); + if (ret) + goto out_free; ret = set_pasid_state(dev_state, pasid_state, pasid); if (ret) -- 2.25.1
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