+ dma-buf-free-dmabuf-name-in-dma_buf_release.patch added to -mm tree

[Sumit Semwal]

Hello Andrew,


On Wed, 26 Feb 2020 at 07:25, Andrew Morton <akpm at linux-foundation.org> wrote:
>
>
> The patch titled
>      Subject: dma-buf: free dmabuf->name in dma_buf_release()
> has been added to the -mm tree.  Its filename is
>      dma-buf-free-dmabuf-name-in-dma_buf_release.patch

Thanks for taking this patch via -mm during my absence (I'm just
returning from a bit of an illness). If there are other dma-buf
patches on your radar that you'd like to take via the mm tree, please
let me know and I can provide the necessary Acks.
Else I will take them in via drm-misc as usual.


>
> This patch should soon appear at
>     http://ozlabs.org/~akpm/mmots/broken-out/dma-buf-free-dmabuf-name-in-dma_buf_release.patch
> and later at
>     http://ozlabs.org/~akpm/mmotm/broken-out/dma-buf-free-dmabuf-name-in-dma_buf_release.patch
>
> Before you just go and hit "reply", please:
>    a) Consider who else should be cc'ed
>    b) Prefer to cc a suitable mailing list as well
>    c) Ideally: find the original patch on the mailing list and do a
>       reply-to-all to that, adding suitable additional cc's
>
> *** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
>
> The -mm tree is included into linux-next and is updated
> there every 3-4 working days
>
> ------------------------------------------------------
> From: Cong Wang <xiyou.wangcong at gmail.com>
> Subject: 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().
>
> Link: http://lkml.kernel.org/r/20200225204446.11378-1-xiyou.wangcong@gmail.com
> Fixes: bb2bb9030425 ("dma-buf: add DMA_BUF_SET_NAME ioctls")
> Reported-by: syzbot+b2098bc44728a4efb3e9 at syzkaller.appspotmail.com
> Signed-off-by: Cong Wang <xiyou.wangcong at gmail.com>
> Reviewed-by: Andrew Morton <akpm at linux-foundation.org>
> Acked-by: Chenbo Feng <fengc at google.com>
> Cc: Sumit Semwal <sumit.semwal at linaro.org>
> Cc: Greg Hackmann <ghackmann at google.com>
> Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
> ---
>
>  drivers/dma-buf/dma-buf.c |    1 +
>  1 file changed, 1 insertion(+)
>
> --- a/drivers/dma-buf/dma-buf.c~dma-buf-free-dmabuf-name-in-dma_buf_release
> +++ a/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;
>  }
> _
>
> Patches currently in -mm which might be from xiyou.wangcong at gmail.com are
>
> dma-buf-free-dmabuf-name-in-dma_buf_release.patch
>
Thanks and best regards,
Sumit.