Re: [PATCH] scsi: sg: Prevent potential double frees in sg driver

[Greg KH]

On Thu, Aug 03, 2017 at 12:02:47PM -0700, Nick Desaulniers wrote:
> From: Robb Glasser <rglasser@xxxxxxxxxx>
> 
> sg_ioctl could be spammed by requests, leading to a double free in
> __free_pages. This protects the entry points of sg_ioctl where the
> memory could be corrupted by a double call to __free_pages if multiple
> requests are happening concurrently.
> 
> Signed-off-by: Robb Glasser <rglasser@xxxxxxxxxx>
> Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
> ---
>  drivers/scsi/sg.c | 2 ++
>  1 file changed, 2 insertions(+)

Why no one on the to: line?

And do you want this in the stable kernel trees?  If so, please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

thanks,

greg k-h