[PATCH] dma-buf: free dmabuf->name in dma_buf_release()

[Cong Wang]

dma-buff name can be set via DMA_BUF_SET_NAME ioctl, but once set
it never gets freed.

Free it in dma_buf_release().

Fixes: bb2bb9030425 ("dma-buf: add DMA_BUF_SET_NAME ioctls")
Reported-by: syzbot+b2098bc44728a4efb3e9 at syzkaller.appspotmail.com
Acked-by: Chenbo Feng <fengc at google.com>
Cc: Sumit Semwal <sumit.semwal at linaro.org>
Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: Linus Torvalds <torvalds at linux-foundation.org>
Signed-off-by: Cong Wang <xiyou.wangcong at gmail.com>
---
 drivers/dma-buf/dma-buf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index d4097856c86b..c343c7c10b4c 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -108,6 +108,7 @@ static int dma_buf_release(struct inode *inode, struct file *file)
 		dma_resv_fini(dmabuf->resv);
 
 	module_put(dmabuf->owner);
+	kfree(dmabuf->name);
 	kfree(dmabuf);
 	return 0;
 }
-- 
2.21.1