Re: [PATCH, 3.18-stable regression] gadgetfs: fix uninitialized variable in error handling

[Greg KH]

On Fri, Apr 21, 2017 at 03:06:12PM +0200, Arnd Bergmann wrote:
> gcc warns about a bug in 3.18.y:
> 
> drivers/usb/gadget/legacy/inode.c:648:10: warning: 'value' may be used
> 
> This is caused by the backport of f01d35a15fa0416 from 4.0 to 3.18:
> c81fc59be42c6e0 gadgetfs: use-after-free in ->aio_read()
> 
> The backported patch was buggy, but the mainline code was rewritten
> in a larger patch directly following this one in a way that fixed the
> bug.
> 
> For stable, we should need only a one-line change to make sure we
> return an proper error code. It is very unlikely that anybody ever
> ran into the out-of-memory case here in practice, but the compiler
> is right in theory.
> 
> Fixes: c81fc59be42c ("gadgetfs: use-after-free in ->aio_read()")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
>  drivers/usb/gadget/legacy/inode.c | 1 +
>  1 file changed, 1 insertion(+)

Now queued up, thanks!

greg k-h