From: Mateusz Polrola <mateuszx.potrola@xxxxxxxxx>
Added error checking on the result of function call,
dma_buf_map_attachment
Signed-off-by: Dongwon Kim <dongwon.kim@xxxxxxxxx>
---
drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c
index c0048d9..476c0d7 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c
@@ -149,6 +149,11 @@ static int hyper_dmabuf_export_remote(struct file *filp, void *data)
sgt = dma_buf_map_attachment(attachment, DMA_BIDIRECTIONAL);
+ if (IS_ERR(sgt)) {
+ dev_err(hyper_dmabuf_private.device, "Cannot map attachment\n");
+ return PTR_ERR(sgt);
+ }
+
sgt_info = kcalloc(1, sizeof(*sgt_info), GFP_KERNEL);
if(!sgt_info) {
--
2.7.4
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