[Virtio-fs] [PATCH 2/5] virtiofsd: prevent lo_lookup() NULL pointer dereference

[Stefan Hajnoczi]

On Fri, Jul 26, 2019 at 02:26:14PM -0700, Liu Bo wrote:
> On Fri, Jul 26, 2019 at 10:11:00AM +0100, Stefan Hajnoczi wrote:
> > Most lo_do_lookup() have already checked that the parent inode exists.
> > lo_lookup() hasn't and can therefore hit a NULL pointer dereference when
> > lo_inode(req, parent) returns NULL.
> >
> 
> Sigh...this one has been fixed by 3 different developers...Me, Pengtao and Stefan.
> 
> The following one on the ML did the exactly same thing.
> ---
> Subject: [Virtio-fs] [PATCH] virtiofsd: fix lo_do_lookup panic
> 
> It needs to check for invalid parent dir.
> 
> Signed-off-by: Peng Tao <tao.peng at linux.alibaba.com>
> ---

One of the previously posted patches will be merged before mine.  It's a
shame that work has been duplicated.  As a contributor I will send a
ping email if there has been no response to a patch after a few days.

Stefan
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