From: Xiaoke Wang <[email protected]> kzalloc() is a memory allocation function which can return NULL when some internal memory errors happen. So it is better to check it to prevent potential wrong memory access.
Signed-off-by: Xiaoke Wang <[email protected]> --- 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 3a38352..697ad63 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -597,6 +597,10 @@ 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_master\n"); + return; + } master->of_node = dev->of_node; list_add(&master->list, &(*iommu)->ctx_list); dev_iommu_priv_set(dev, master); -- _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
