Re: [Qemu-devel] [PATCH 15/29] 9pfs: local: statfs: don't follow symlinks

[Stefan Hajnoczi]

On Mon, Feb 20, 2017 at 03:41:16PM +0100, Greg Kurz wrote:
> The local_statfs() callback is vulnerable to symlink attacks because it
> calls statfs() which follows symbolic links in all path elements.
> 
> This patch converts local_statfs() to rely on open_nofollow() and fstatfs()
> instead.
> 
> This partly fixes CVE-2016-9602.
> 
> Signed-off-by: Greg Kurz <address@hidden>
> ---
>  hw/9pfs/9p-local.c |   10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)

Reviewed-by: Stefan Hajnoczi <address@hidden>

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