Re: [PATCH] smb: client: avoid NULL resp_iov dereference

[Philip Li]

On Sun, Sep 27, 2026 at 05:54:30PM +0300, Dan Carpenter wrote:
> On Sat, Sep 26, 2026 at 01:22:08PM +0000, Zihan Xi wrote:
> > compound_send_recv() only populates response vectors when resp_iov is
> > non-NULL. The final pre-authentication hash update nevertheless
> > dereferences resp_iov[0] whenever all compound requests complete.
> > 
> > Guard the update with resp_iov to match the response-buffer handling and
> > avoid a NULL pointer dereference on callers that do not request response
> > vectors.
> > 
> > Fixes: 62432a3f5145 ("cifs: Clean up some places where an extra kvec[] was required for rfc1002")
> > Cc: stable@xxxxxxxxxxxxxxx
> > Reported-by: kernel test robot <lkp@xxxxxxxxx>
> > Reported-by: Dan Carpenter <error27@xxxxxxxxx>
> > Closes: https://lore.kernel.org/all/202609241449.HlHmnZFZ-lkp@xxxxxxxxx/
> 
> Originally the idea was that I would review these and filter out
> the false positives, but these days people use lei to read email so
> they recieve the unfiltered warnings.  The zero day bot should
> probably put a "Unfiltered warning" note at the top to let people
> know the warning hasn't been reviewed.

Got it, I will add this note to the bot report for unfiltered warnings.

Thanks

> 
> regards,
> dan carpenter
> 
> 
>