At line 600 in drivers/iommu/msm_iommu.c, the ret-val of kzalloc should be
checked to avoid null-ptr-deref bug.
Signed-off-by: tangzhenhao <tz...@mails.tsinghua.edu.cn>
---
drivers/iommu/msm_iommu.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index 3615cd6241c4..e3c576e5babb 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -598,6 +598,10 @@ static void insert_iommu_master(struct device *dev,
if (list_empty(&(*iommu)->ctx_list)) {
master = kzalloc(sizeof(*master), GFP_ATOMIC);
+ if (!master) {
+ dev_err(dev, "Failed to allocate IOMMU context bank
instance\n");
+ return;
+ }
master->of_node = dev->of_node;
list_add(&master->list, &(*iommu)->ctx_list);
dev_iommu_priv_set(dev, master);
--
2.17.1
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