From: Lv Ruyi <lv.r...@zte.com.cn>
kmem_cache_zalloc is a memory allocation function which can return NULL
when some internal memory errors happen. Add null pointer check to avoid
dereferencing null pointer.
Reported-by: Zeal Robot <zea...@zte.com.cn>
Signed-off-by: Lv Ruyi <lv.r...@zte.com.cn>
---
drivers/iommu/fsl_pamu_domain.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index 69a4a62dc3b9..43849c027298 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -152,6 +152,10 @@ static void attach_device(struct fsl_dma_domain
*dma_domain, int liodn, struct d
}
info = kmem_cache_zalloc(iommu_devinfo_cache, GFP_ATOMIC);
+ if (!info) {
+ spin_unlock_irqrestore(&device_domain_lock, flags);
+ return;
+ }
info->dev = dev;
info->liodn = liodn;
--
2.25.1
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