On Mon, Nov 19, 2018 at 05:27:18PM +0100, Andreas Gruenbacher wrote:
> commit c26b5aa8ef0d46035060fded475e6ab957b9f69f upstream.
>
> GFS2 passes the inode buffer head (dibh) from gfs2_iomap_begin to
> gfs2_iomap_end in iomap->private. It sets that private pointer in
> gfs2_iomap_get. Users of gfs2_iomap_get other than gfs2_iomap_begin
> would have to release iomap->private, but this isn't done correctly,
> leading to a leak of buffer head references.
>
> To fix this, move the code for setting iomap->private from
> gfs2_iomap_get to gfs2_iomap_begin.
>
> Fixes: 64bc06bb32 ("gfs2: iomap buffered write support")
> Cc: stable@xxxxxxxxxxxxxxx # v4.19
Now applied, thanks.
greg k-h
