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| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2022-02-07 23:50:48 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-02-08 15:55:05 +0000 |
| commit | 98b64741d61124a12fb05a7595acb1fd6c1dc55d (patch) | |
| tree | 8e1989026ee6aea4cd4ed24b3fedd4186cb3f818 /drivers/iommu/arm | |
| parent | 26291c54e111ff6ba87a164d85d4a4e134b7315c (diff) | |
| download | linux-98b64741d61124a12fb05a7595acb1fd6c1dc55d.tar.gz linux-98b64741d61124a12fb05a7595acb1fd6c1dc55d.tar.bz2 linux-98b64741d61124a12fb05a7595acb1fd6c1dc55d.zip | |
iommu/arm-smmu-v3: Avoid open coded arithmetic in memory allocation
kmalloc_array()/kcalloc() should be used to avoid potential overflow when
a multiplication is needed to compute the size of the requested memory.
So turn a devm_kzalloc()+explicit size computation into an equivalent
devm_kcalloc().
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/3f7b9b202c6b6f5edc234ab7af5f208fbf8bc944.1644274051.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/iommu/arm')
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 6dc6d8b6b368..14d06aad0726 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2981,10 +2981,10 @@ static int arm_smmu_init_l1_strtab(struct arm_smmu_device *smmu) { unsigned int i; struct arm_smmu_strtab_cfg *cfg = &smmu->strtab_cfg; - size_t size = sizeof(*cfg->l1_desc) * cfg->num_l1_ents; void *strtab = smmu->strtab_cfg.strtab; - cfg->l1_desc = devm_kzalloc(smmu->dev, size, GFP_KERNEL); + cfg->l1_desc = devm_kcalloc(smmu->dev, cfg->num_l1_ents, + sizeof(*cfg->l1_desc), GFP_KERNEL); if (!cfg->l1_desc) return -ENOMEM; |