linux-kernel - [PATCH 5.4 160/168] dma-buf: free dmabuf->name in dma_buf

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Message-Id: <20200310123651.733901630@linuxfoundation.org>
Date:   Tue, 10 Mar 2020 13:40:06 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        syzbot+b2098bc44728a4efb3e9@...kaller.appspotmail.com,
        Greg Hackmann <ghackmann@...gle.com>,
        Chenbo Feng <fengc@...gle.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Cong Wang <xiyou.wangcong@...il.com>
Subject: [PATCH 5.4 160/168] dma-buf: free dmabuf->name in dma_buf_release()

From: Cong Wang <xiyou.wangcong@...il.com>

commit d1f37226431f5d9657aa144a40f2383adbcf27e1 upstream.

dma-buf 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@...kaller.appspotmail.com
Cc: Greg Hackmann <ghackmann@...gle.com>
Cc: Chenbo Feng <fengc@...gle.com>
Cc: Sumit Semwal <sumit.semwal@...aro.org>
Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
Acked-by: Chenbo Feng <fengc@...gle.com>
Signed-off-by: Sumit Semwal <sumit.semwal@...aro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191227063204.5813-1-xiyou.wangcong@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/dma-buf/dma-buf.c |    1 +
 1 file changed, 1 insertion(+)

--- 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
 		dma_resv_fini(dmabuf->resv);
 
 	module_put(dmabuf->owner);
+	kfree(dmabuf->name);
 	kfree(dmabuf);
 	return 0;
 }