5.15-stable review patch. If anyone has any objections, please let me know.
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From: Artem Chernyshev artem.chernyshev@red-soft.ru
[ Upstream commit 630482ee0653decf9e2482ac6181897eb6cde5b8 ]
In sprd_iommu_cleanup() before calling function sprd_iommu_hw_en() dom->sdev is equal to NULL, which leads to null dereference.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 9afea57384d4 ("iommu/sprd: Release dma buffer to avoid memory leak") Signed-off-by: Artem Chernyshev artem.chernyshev@red-soft.ru Reviewed-by: Chunyan Zhang zhang.lyra@gmail.com Link: https://lore.kernel.org/r/20240716125522.3690358-1-artem.chernyshev@red-soft... Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iommu/sprd-iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/sprd-iommu.c b/drivers/iommu/sprd-iommu.c index 6b11770e3d75a..f9392dbe6511e 100644 --- a/drivers/iommu/sprd-iommu.c +++ b/drivers/iommu/sprd-iommu.c @@ -234,8 +234,8 @@ static void sprd_iommu_cleanup(struct sprd_iommu_domain *dom)
pgt_size = sprd_iommu_pgt_size(&dom->domain); dma_free_coherent(dom->sdev->dev, pgt_size, dom->pgt_va, dom->pgt_pa); - dom->sdev = NULL; sprd_iommu_hw_en(dom->sdev, false); + dom->sdev = NULL; }
static void sprd_iommu_domain_free(struct iommu_domain *domain)