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| author | Artem Chernyshev <artem.chernyshev@red-soft.ru> | 2024-07-16 15:55:14 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-08-03 08:54:41 +0200 |
| commit | b62841e49a2b7938f6fdeaaf93fb57e4eb880bdb (patch) | |
| tree | 00c0bf6df935993fb03d70299d89c993db059128 /drivers/iommu | |
| parent | 97dfb89415fd74a9a4bf824a1d556361e3603fdd (diff) | |
| download | linux-b62841e49a2b7938f6fdeaaf93fb57e4eb880bdb.tar.gz linux-b62841e49a2b7938f6fdeaaf93fb57e4eb880bdb.tar.bz2 linux-b62841e49a2b7938f6fdeaaf93fb57e4eb880bdb.zip | |
iommu: sprd: Avoid NULL deref in sprd_iommu_hw_en
[ 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.ru
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/sprd-iommu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/sprd-iommu.c b/drivers/iommu/sprd-iommu.c index 2fa9afebd4f5..c8e79a2d8b4c 100644 --- a/drivers/iommu/sprd-iommu.c +++ b/drivers/iommu/sprd-iommu.c @@ -236,8 +236,8 @@ 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) |