linux-kernel - [PATCH] dma-buf: free dmabuf->name in dma_buf

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 26 Dec 2019 22:32:04 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        Cong Wang <xiyou.wangcong@...il.com>,
        syzbot+b2098bc44728a4efb3e9@...kaller.appspotmail.com,
        Greg Hackmann <ghackmann@...gle.com>,
        Chenbo Feng <fengc@...gle.com>,
        Sumit Semwal <sumit.semwal@...aro.org>
Subject: [PATCH] dma-buf: free dmabuf->name in dma_buf_release()

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@...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>
---
 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 ce41cd9b758a..2427398ff22a 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;
 }
-- 
2.21.0